./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 791161d1 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-?-791161d [2022-07-23 15:28:42,688 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-23 15:28:42,690 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-23 15:28:42,742 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-23 15:28:42,742 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-23 15:28:42,744 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-23 15:28:42,745 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-23 15:28:42,747 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-23 15:28:42,748 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-23 15:28:42,751 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-23 15:28:42,752 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-23 15:28:42,754 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-23 15:28:42,754 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-23 15:28:42,755 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-23 15:28:42,756 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-23 15:28:42,758 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-23 15:28:42,759 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-23 15:28:42,760 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-23 15:28:42,761 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-23 15:28:42,765 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-23 15:28:42,767 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-23 15:28:42,767 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-23 15:28:42,768 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-23 15:28:42,769 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-23 15:28:42,770 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-23 15:28:42,775 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-23 15:28:42,775 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-23 15:28:42,775 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-23 15:28:42,776 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-23 15:28:42,776 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-23 15:28:42,777 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-23 15:28:42,777 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-23 15:28:42,779 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-23 15:28:42,779 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-23 15:28:42,780 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-23 15:28:42,780 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-23 15:28:42,780 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-23 15:28:42,781 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-23 15:28:42,781 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-23 15:28:42,782 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-23 15:28:42,782 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-23 15:28:42,784 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-23 15:28:42,784 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-32bit-Automizer_Default.epf [2022-07-23 15:28:42,806 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-23 15:28:42,807 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-23 15:28:42,807 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-23 15:28:42,807 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-23 15:28:42,809 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-23 15:28:42,809 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-23 15:28:42,809 INFO L138 SettingsManager]: * Use SBE=true [2022-07-23 15:28:42,809 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2022-07-23 15:28:42,809 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2022-07-23 15:28:42,810 INFO L138 SettingsManager]: * Use old map elimination=false [2022-07-23 15:28:42,810 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2022-07-23 15:28:42,810 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2022-07-23 15:28:42,811 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2022-07-23 15:28:42,811 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-23 15:28:42,811 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-23 15:28:42,811 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-23 15:28:42,811 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-23 15:28:42,812 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-23 15:28:42,812 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-23 15:28:42,812 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2022-07-23 15:28:42,813 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2022-07-23 15:28:42,813 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2022-07-23 15:28:42,813 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-23 15:28:42,813 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-23 15:28:42,813 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2022-07-23 15:28:42,813 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-23 15:28:42,813 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2022-07-23 15:28:42,814 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-23 15:28:42,814 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-23 15:28:42,814 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-23 15:28:42,814 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-23 15:28:42,815 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-07-23 15:28:42,815 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> acde98dd01af02b5a508b32116f1b2c3612f1f84e6ba2fe02fc76c333a1d32d3 [2022-07-23 15:28:42,981 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-23 15:28:42,995 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-23 15:28:42,996 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-23 15:28:42,997 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-23 15:28:42,998 INFO L275 PluginConnector]: CDTParser initialized [2022-07-23 15:28:42,998 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/fibo_10-1.c [2022-07-23 15:28:43,037 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7736d91a5/7f0beedd570247349eace18bc2c6c78c/FLAG4ccc8efdd [2022-07-23 15:28:43,389 INFO L306 CDTParser]: Found 1 translation units. [2022-07-23 15:28:43,390 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_10-1.c [2022-07-23 15:28:43,394 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7736d91a5/7f0beedd570247349eace18bc2c6c78c/FLAG4ccc8efdd [2022-07-23 15:28:43,401 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7736d91a5/7f0beedd570247349eace18bc2c6c78c [2022-07-23 15:28:43,403 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-23 15:28:43,404 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-23 15:28:43,405 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-23 15:28:43,405 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-23 15:28:43,407 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-23 15:28:43,408 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.07 03:28:43" (1/1) ... [2022-07-23 15:28:43,408 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79101def and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 03:28:43, skipping insertion in model container [2022-07-23 15:28:43,409 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.07 03:28:43" (1/1) ... [2022-07-23 15:28:43,413 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-23 15:28:43,419 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-23 15:28:43,582 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] [2022-07-23 15:28:43,583 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-23 15:28:43,608 INFO L203 MainTranslator]: Completed pre-run [2022-07-23 15:28:43,617 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] [2022-07-23 15:28:43,619 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-23 15:28:43,643 INFO L208 MainTranslator]: Completed translation [2022-07-23 15:28:43,644 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 03:28:43 WrapperNode [2022-07-23 15:28:43,644 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-23 15:28:43,645 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-23 15:28:43,645 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-23 15:28:43,645 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-23 15:28:43,650 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 03:28:43" (1/1) ... [2022-07-23 15:28:43,654 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 03:28:43" (1/1) ... [2022-07-23 15:28:43,678 INFO L137 Inliner]: procedures = 13, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 20 [2022-07-23 15:28:43,679 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-23 15:28:43,679 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-23 15:28:43,680 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-23 15:28:43,680 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-23 15:28:43,684 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 03:28:43" (1/1) ... [2022-07-23 15:28:43,684 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 03:28:43" (1/1) ... [2022-07-23 15:28:43,692 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 03:28:43" (1/1) ... [2022-07-23 15:28:43,693 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 03:28:43" (1/1) ... [2022-07-23 15:28:43,695 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 03:28:43" (1/1) ... [2022-07-23 15:28:43,696 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 03:28:43" (1/1) ... [2022-07-23 15:28:43,699 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 03:28:43" (1/1) ... [2022-07-23 15:28:43,700 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-23 15:28:43,701 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-23 15:28:43,701 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-23 15:28:43,702 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-23 15:28:43,702 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 03:28:43" (1/1) ... [2022-07-23 15:28:43,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-23 15:28:43,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 15:28:43,768 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) [2022-07-23 15:28:43,804 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 [2022-07-23 15:28:43,830 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-23 15:28:43,830 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-23 15:28:43,830 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-23 15:28:43,830 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-23 15:28:43,831 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2022-07-23 15:28:43,831 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2022-07-23 15:28:43,873 INFO L234 CfgBuilder]: Building ICFG [2022-07-23 15:28:43,874 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-23 15:28:43,963 INFO L275 CfgBuilder]: Performing block encoding [2022-07-23 15:28:43,966 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-23 15:28:43,967 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-07-23 15:28:43,968 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 03:28:43 BoogieIcfgContainer [2022-07-23 15:28:43,968 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-23 15:28:43,968 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2022-07-23 15:28:43,968 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2022-07-23 15:28:43,971 INFO L275 PluginConnector]: BuchiAutomizer initialized [2022-07-23 15:28:43,972 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2022-07-23 15:28:43,972 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 23.07 03:28:43" (1/3) ... [2022-07-23 15:28:43,973 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@37f2466d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 23.07 03:28:43, skipping insertion in model container [2022-07-23 15:28:43,973 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2022-07-23 15:28:43,973 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 03:28:43" (2/3) ... [2022-07-23 15:28:43,973 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@37f2466d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 23.07 03:28:43, skipping insertion in model container [2022-07-23 15:28:43,973 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2022-07-23 15:28:43,974 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 03:28:43" (3/3) ... [2022-07-23 15:28:43,975 INFO L354 chiAutomizerObserver]: Analyzing ICFG fibo_10-1.c [2022-07-23 15:28:44,018 INFO L255 stractBuchiCegarLoop]: Interprodecural is true [2022-07-23 15:28:44,018 INFO L256 stractBuchiCegarLoop]: Hoare is false [2022-07-23 15:28:44,018 INFO L257 stractBuchiCegarLoop]: Compute interpolants for ForwardPredicates [2022-07-23 15:28:44,018 INFO L258 stractBuchiCegarLoop]: Backedges is STRAIGHT_LINE [2022-07-23 15:28:44,018 INFO L259 stractBuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2022-07-23 15:28:44,018 INFO L260 stractBuchiCegarLoop]: Difference is false [2022-07-23 15:28:44,018 INFO L261 stractBuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2022-07-23 15:28:44,018 INFO L265 stractBuchiCegarLoop]: ======== Iteration 0 == of CEGAR loop == BuchiAutomatonCegarLoop ======== [2022-07-23 15:28:44,021 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) [2022-07-23 15:28:44,044 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2022-07-23 15:28:44,044 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-07-23 15:28:44,044 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-07-23 15:28:44,048 INFO L179 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1] [2022-07-23 15:28:44,048 INFO L180 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2022-07-23 15:28:44,048 INFO L287 stractBuchiCegarLoop]: ======== Iteration 1 ============ [2022-07-23 15:28:44,048 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) [2022-07-23 15:28:44,050 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2022-07-23 15:28:44,050 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-07-23 15:28:44,050 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-07-23 15:28:44,051 INFO L179 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1] [2022-07-23 15:28:44,051 INFO L180 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2022-07-23 15:28:44,058 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 [2022-07-23 15:28:44,058 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 [2022-07-23 15:28:44,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 15:28:44,063 INFO L85 PathProgramCache]: Analyzing trace with hash 29883, now seen corresponding path program 1 times [2022-07-23 15:28:44,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 15:28:44,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251370355] [2022-07-23 15:28:44,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 15:28:44,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 15:28:44,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-23 15:28:44,124 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-23 15:28:44,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-23 15:28:44,143 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-23 15:28:44,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 15:28:44,145 INFO L85 PathProgramCache]: Analyzing trace with hash 1450956, now seen corresponding path program 1 times [2022-07-23 15:28:44,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 15:28:44,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506298428] [2022-07-23 15:28:44,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 15:28:44,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 15:28:44,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-23 15:28:44,151 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-23 15:28:44,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-23 15:28:44,155 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-23 15:28:44,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 15:28:44,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1828301702, now seen corresponding path program 1 times [2022-07-23 15:28:44,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 15:28:44,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4977088] [2022-07-23 15:28:44,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 15:28:44,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 15:28:44,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-23 15:28:44,180 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-23 15:28:44,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-23 15:28:44,188 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-23 15:28:44,257 INFO L210 LassoAnalysis]: Preferences: [2022-07-23 15:28:44,257 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-07-23 15:28:44,258 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-07-23 15:28:44,258 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-07-23 15:28:44,258 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2022-07-23 15:28:44,258 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-23 15:28:44,258 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-07-23 15:28:44,258 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-07-23 15:28:44,258 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration1_Loop [2022-07-23 15:28:44,259 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-07-23 15:28:44,259 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-07-23 15:28:44,267 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-23 15:28:44,275 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-23 15:28:44,277 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-23 15:28:44,279 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-23 15:28:44,285 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-23 15:28:44,318 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-07-23 15:28:44,319 INFO L404 LassoAnalysis]: Checking for nontermination... [2022-07-23 15:28:44,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-23 15:28:44,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 15:28:44,321 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) [2022-07-23 15:28:44,322 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 [2022-07-23 15:28:44,324 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-23 15:28:44,324 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-23 15:28:44,344 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-07-23 15:28:44,344 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret5=0} Honda state: {fibo_#t~ret5=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-07-23 15:28:44,360 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 [2022-07-23 15:28:44,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-23 15:28:44,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 15:28:44,362 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) [2022-07-23 15:28:44,363 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 [2022-07-23 15:28:44,364 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-23 15:28:44,364 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-23 15:28:44,385 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-07-23 15:28:44,385 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-07-23 15:28:44,402 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 [2022-07-23 15:28:44,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-23 15:28:44,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 15:28:44,404 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) [2022-07-23 15:28:44,405 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 [2022-07-23 15:28:44,406 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-23 15:28:44,406 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-23 15:28:44,435 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-07-23 15:28:44,435 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_~n=0} Honda state: {fibo_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-07-23 15:28:44,451 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 [2022-07-23 15:28:44,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-23 15:28:44,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 15:28:44,452 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) [2022-07-23 15:28:44,454 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 [2022-07-23 15:28:44,455 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-23 15:28:44,455 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-23 15:28:44,491 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 [2022-07-23 15:28:44,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-23 15:28:44,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 15:28:44,492 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) [2022-07-23 15:28:44,493 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 [2022-07-23 15:28:44,494 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2022-07-23 15:28:44,494 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-23 15:28:44,552 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2022-07-23 15:28:44,557 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Ended with exit code 0 [2022-07-23 15:28:44,557 INFO L210 LassoAnalysis]: Preferences: [2022-07-23 15:28:44,557 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-07-23 15:28:44,558 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-07-23 15:28:44,558 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-07-23 15:28:44,558 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2022-07-23 15:28:44,558 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-23 15:28:44,558 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-07-23 15:28:44,558 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-07-23 15:28:44,558 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration1_Loop [2022-07-23 15:28:44,558 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-07-23 15:28:44,558 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-07-23 15:28:44,559 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-23 15:28:44,564 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-23 15:28:44,566 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-23 15:28:44,569 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-23 15:28:44,581 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-23 15:28:44,612 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-07-23 15:28:44,615 INFO L490 LassoAnalysis]: Using template 'affine'. [2022-07-23 15:28:44,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-23 15:28:44,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 15:28:44,617 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) [2022-07-23 15:28:44,622 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 [2022-07-23 15:28:44,623 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 [2022-07-23 15:28:44,629 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-23 15:28:44,629 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-23 15:28:44,630 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-23 15:28:44,630 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-23 15:28:44,630 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-23 15:28:44,631 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-23 15:28:44,631 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-23 15:28:44,648 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-07-23 15:28:44,665 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 [2022-07-23 15:28:44,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-23 15:28:44,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 15:28:44,667 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) [2022-07-23 15:28:44,668 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 [2022-07-23 15:28:44,669 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 [2022-07-23 15:28:44,676 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-23 15:28:44,676 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-23 15:28:44,676 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-23 15:28:44,676 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-23 15:28:44,676 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-23 15:28:44,678 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-23 15:28:44,678 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-23 15:28:44,690 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-07-23 15:28:44,706 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 [2022-07-23 15:28:44,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-23 15:28:44,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 15:28:44,708 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) [2022-07-23 15:28:44,708 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 [2022-07-23 15:28:44,709 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 [2022-07-23 15:28:44,716 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-23 15:28:44,716 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-23 15:28:44,716 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-23 15:28:44,716 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-23 15:28:44,716 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-23 15:28:44,717 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-23 15:28:44,717 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-23 15:28:44,720 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-07-23 15:28:44,735 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Ended with exit code 0 [2022-07-23 15:28:44,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-23 15:28:44,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 15:28:44,737 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) [2022-07-23 15:28:44,738 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 [2022-07-23 15:28:44,739 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 [2022-07-23 15:28:44,745 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-23 15:28:44,745 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-23 15:28:44,745 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-23 15:28:44,745 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-23 15:28:44,745 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-23 15:28:44,746 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-23 15:28:44,746 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-23 15:28:44,761 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2022-07-23 15:28:44,764 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2022-07-23 15:28:44,764 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2022-07-23 15:28:44,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-23 15:28:44,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 15:28:44,766 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) [2022-07-23 15:28:44,767 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 [2022-07-23 15:28:44,795 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2022-07-23 15:28:44,795 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2022-07-23 15:28:44,796 INFO L513 LassoAnalysis]: Proved termination. [2022-07-23 15:28:44,796 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_#in~n) = 1*fibo_#in~n Supporting invariants [] [2022-07-23 15:28:44,812 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Ended with exit code 0 [2022-07-23 15:28:44,815 INFO L293 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2022-07-23 15:28:44,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 15:28:44,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 15:28:44,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-23 15:28:44,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 15:28:44,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 15:28:44,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-23 15:28:44,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 15:28:44,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 15:28:44,898 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 [2022-07-23 15:28:44,899 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) [2022-07-23 15:28:44,956 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. [2022-07-23 15:28:44,958 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 [2022-07-23 15:28:44,961 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) [2022-07-23 15:28:44,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 11 transitions. [2022-07-23 15:28:44,962 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 3 letters. Loop has 4 letters. [2022-07-23 15:28:44,963 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-23 15:28:44,963 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 7 letters. Loop has 4 letters. [2022-07-23 15:28:44,963 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-23 15:28:44,963 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 3 letters. Loop has 8 letters. [2022-07-23 15:28:44,964 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-23 15:28:44,964 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 48 states and 60 transitions. [2022-07-23 15:28:44,967 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2022-07-23 15:28:44,971 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 48 states to 25 states and 34 transitions. [2022-07-23 15:28:44,971 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 17 [2022-07-23 15:28:44,972 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 18 [2022-07-23 15:28:44,972 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 34 transitions. [2022-07-23 15:28:44,972 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-07-23 15:28:44,972 INFO L369 hiAutomatonCegarLoop]: Abstraction has 25 states and 34 transitions. [2022-07-23 15:28:44,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states and 34 transitions. [2022-07-23 15:28:44,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 20. [2022-07-23 15:28:44,988 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) [2022-07-23 15:28:44,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 26 transitions. [2022-07-23 15:28:44,989 INFO L392 hiAutomatonCegarLoop]: Abstraction has 20 states and 26 transitions. [2022-07-23 15:28:44,989 INFO L374 stractBuchiCegarLoop]: Abstraction has 20 states and 26 transitions. [2022-07-23 15:28:44,989 INFO L287 stractBuchiCegarLoop]: ======== Iteration 2 ============ [2022-07-23 15:28:44,989 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 20 states and 26 transitions. [2022-07-23 15:28:44,990 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2022-07-23 15:28:44,990 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-07-23 15:28:44,990 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-07-23 15:28:44,991 INFO L179 hiAutomatonCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 15:28:44,991 INFO L180 hiAutomatonCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 15:28:44,991 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 [2022-07-23 15:28:44,991 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 [2022-07-23 15:28:44,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 15:28:44,992 INFO L85 PathProgramCache]: Analyzing trace with hash -1181449843, now seen corresponding path program 1 times [2022-07-23 15:28:44,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 15:28:44,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200691789] [2022-07-23 15:28:44,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 15:28:44,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 15:28:45,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 15:28:45,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-23 15:28:45,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 15:28:45,043 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 15:28:45,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 15:28:45,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200691789] [2022-07-23 15:28:45,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200691789] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 15:28:45,044 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 15:28:45,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-23 15:28:45,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140051422] [2022-07-23 15:28:45,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 15:28:45,047 INFO L757 eck$LassoCheckResult]: stem already infeasible [2022-07-23 15:28:45,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 15:28:45,047 INFO L85 PathProgramCache]: Analyzing trace with hash 246097683, now seen corresponding path program 1 times [2022-07-23 15:28:45,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 15:28:45,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459774509] [2022-07-23 15:28:45,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 15:28:45,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 15:28:45,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 15:28:45,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-23 15:28:45,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 15:28:45,078 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 15:28:45,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 15:28:45,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459774509] [2022-07-23 15:28:45,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459774509] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 15:28:45,079 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 15:28:45,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-23 15:28:45,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588993107] [2022-07-23 15:28:45,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 15:28:45,080 INFO L769 eck$LassoCheckResult]: loop already infeasible [2022-07-23 15:28:45,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 15:28:45,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-23 15:28:45,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-23 15:28:45,082 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) [2022-07-23 15:28:45,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 15:28:45,123 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2022-07-23 15:28:45,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-23 15:28:45,124 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 26 states and 32 transitions. [2022-07-23 15:28:45,125 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2022-07-23 15:28:45,126 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 26 states to 24 states and 30 transitions. [2022-07-23 15:28:45,126 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 20 [2022-07-23 15:28:45,126 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 20 [2022-07-23 15:28:45,126 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 30 transitions. [2022-07-23 15:28:45,126 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-07-23 15:28:45,126 INFO L369 hiAutomatonCegarLoop]: Abstraction has 24 states and 30 transitions. [2022-07-23 15:28:45,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states and 30 transitions. [2022-07-23 15:28:45,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-07-23 15:28:45,128 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) [2022-07-23 15:28:45,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2022-07-23 15:28:45,129 INFO L392 hiAutomatonCegarLoop]: Abstraction has 24 states and 30 transitions. [2022-07-23 15:28:45,129 INFO L374 stractBuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2022-07-23 15:28:45,129 INFO L287 stractBuchiCegarLoop]: ======== Iteration 3 ============ [2022-07-23 15:28:45,129 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 24 states and 30 transitions. [2022-07-23 15:28:45,130 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2022-07-23 15:28:45,130 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-07-23 15:28:45,130 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-07-23 15:28:45,131 INFO L179 hiAutomatonCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 15:28:45,131 INFO L180 hiAutomatonCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1] [2022-07-23 15:28:45,131 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 [2022-07-23 15:28:45,131 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 [2022-07-23 15:28:45,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 15:28:45,132 INFO L85 PathProgramCache]: Analyzing trace with hash 2029785426, now seen corresponding path program 1 times [2022-07-23 15:28:45,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 15:28:45,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721115209] [2022-07-23 15:28:45,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 15:28:45,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 15:28:45,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 15:28:45,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-23 15:28:45,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 15:28:45,167 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 15:28:45,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 15:28:45,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721115209] [2022-07-23 15:28:45,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721115209] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 15:28:45,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78258828] [2022-07-23 15:28:45,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 15:28:45,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 15:28:45,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 15:28:45,169 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) [2022-07-23 15:28:45,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-23 15:28:45,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 15:28:45,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-23 15:28:45,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 15:28:45,216 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 15:28:45,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 15:28:45,272 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 15:28:45,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78258828] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 15:28:45,272 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 15:28:45,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2022-07-23 15:28:45,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401634050] [2022-07-23 15:28:45,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 15:28:45,273 INFO L757 eck$LassoCheckResult]: stem already infeasible [2022-07-23 15:28:45,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 15:28:45,273 INFO L85 PathProgramCache]: Analyzing trace with hash -960881524, now seen corresponding path program 1 times [2022-07-23 15:28:45,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 15:28:45,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170676564] [2022-07-23 15:28:45,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 15:28:45,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 15:28:45,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-23 15:28:45,278 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-23 15:28:45,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-23 15:28:45,282 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-23 15:28:45,389 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 [2022-07-23 15:28:45,395 INFO L210 LassoAnalysis]: Preferences: [2022-07-23 15:28:45,395 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-07-23 15:28:45,395 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-07-23 15:28:45,395 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-07-23 15:28:45,395 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2022-07-23 15:28:45,395 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-23 15:28:45,395 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-07-23 15:28:45,395 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-07-23 15:28:45,399 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration3_Loop [2022-07-23 15:28:45,399 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-07-23 15:28:45,399 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-07-23 15:28:45,400 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-23 15:28:45,402 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-23 15:28:45,404 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-23 15:28:45,409 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-23 15:28:45,436 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-07-23 15:28:45,436 INFO L404 LassoAnalysis]: Checking for nontermination... [2022-07-23 15:28:45,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-23 15:28:45,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 15:28:45,438 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) [2022-07-23 15:28:45,438 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 [2022-07-23 15:28:45,440 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-23 15:28:45,440 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-23 15:28:45,461 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-07-23 15:28:45,461 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-07-23 15:28:45,478 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 [2022-07-23 15:28:45,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-23 15:28:45,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 15:28:45,479 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) [2022-07-23 15:28:45,494 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-23 15:28:45,494 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-23 15:28:45,500 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 [2022-07-23 15:28:45,517 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-07-23 15:28:45,517 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret4=1} Honda state: {fibo_#t~ret4=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-07-23 15:28:45,534 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 [2022-07-23 15:28:45,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-23 15:28:45,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 15:28:45,536 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) [2022-07-23 15:28:45,566 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-23 15:28:45,566 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-23 15:28:45,574 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 [2022-07-23 15:28:45,595 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 [2022-07-23 15:28:45,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-23 15:28:45,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 15:28:45,596 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) [2022-07-23 15:28:45,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Waiting until timeout for monitored process [2022-07-23 15:28:45,603 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2022-07-23 15:28:45,604 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-23 15:28:46,409 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2022-07-23 15:28:46,415 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 [2022-07-23 15:28:46,415 INFO L210 LassoAnalysis]: Preferences: [2022-07-23 15:28:46,416 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-07-23 15:28:46,416 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-07-23 15:28:46,416 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-07-23 15:28:46,416 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2022-07-23 15:28:46,416 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-23 15:28:46,416 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-07-23 15:28:46,416 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-07-23 15:28:46,416 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration3_Loop [2022-07-23 15:28:46,416 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-07-23 15:28:46,416 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-07-23 15:28:46,417 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-23 15:28:46,426 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-23 15:28:46,427 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-23 15:28:46,444 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-23 15:28:46,475 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-07-23 15:28:46,475 INFO L490 LassoAnalysis]: Using template 'affine'. [2022-07-23 15:28:46,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-23 15:28:46,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 15:28:46,476 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) [2022-07-23 15:28:46,481 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 [2022-07-23 15:28:46,487 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-23 15:28:46,487 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-23 15:28:46,487 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-23 15:28:46,487 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-23 15:28:46,487 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-23 15:28:46,488 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-23 15:28:46,488 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-23 15:28:46,491 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 [2022-07-23 15:28:46,511 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-07-23 15:28:46,539 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 [2022-07-23 15:28:46,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-23 15:28:46,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 15:28:46,540 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) [2022-07-23 15:28:46,542 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 [2022-07-23 15:28:46,544 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 [2022-07-23 15:28:46,549 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-23 15:28:46,549 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-23 15:28:46,550 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-23 15:28:46,550 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-23 15:28:46,550 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-23 15:28:46,552 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-23 15:28:46,552 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-23 15:28:46,558 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-07-23 15:28:46,575 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Forceful destruction successful, exit code 0 [2022-07-23 15:28:46,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-23 15:28:46,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 15:28:46,576 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) [2022-07-23 15:28:46,577 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 [2022-07-23 15:28:46,579 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 [2022-07-23 15:28:46,584 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-23 15:28:46,584 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-23 15:28:46,584 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-23 15:28:46,584 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-23 15:28:46,585 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-23 15:28:46,586 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-23 15:28:46,586 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-23 15:28:46,588 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2022-07-23 15:28:46,608 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2022-07-23 15:28:46,608 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2022-07-23 15:28:46,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-23 15:28:46,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 15:28:46,610 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) [2022-07-23 15:28:46,615 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2022-07-23 15:28:46,615 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2022-07-23 15:28:46,615 INFO L513 LassoAnalysis]: Proved termination. [2022-07-23 15:28:46,615 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2022-07-23 15:28:46,629 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 [2022-07-23 15:28:46,631 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Ended with exit code 0 [2022-07-23 15:28:46,631 INFO L293 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2022-07-23 15:28:46,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 15:28:46,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 15:28:46,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-23 15:28:46,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 15:28:46,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 15:28:46,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-23 15:28:46,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 15:28:46,790 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 15:28:46,791 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 [2022-07-23 15:28:46,791 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) [2022-07-23 15:28:46,911 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. [2022-07-23 15:28:46,911 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 [2022-07-23 15:28:46,912 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) [2022-07-23 15:28:46,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 37 transitions. [2022-07-23 15:28:46,913 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 37 transitions. Stem has 12 letters. Loop has 10 letters. [2022-07-23 15:28:46,913 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-23 15:28:46,913 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 37 transitions. Stem has 22 letters. Loop has 10 letters. [2022-07-23 15:28:46,914 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-23 15:28:46,914 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 37 transitions. Stem has 12 letters. Loop has 20 letters. [2022-07-23 15:28:46,914 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-23 15:28:46,914 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 135 states and 183 transitions. [2022-07-23 15:28:46,918 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2022-07-23 15:28:46,920 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 135 states to 108 states and 152 transitions. [2022-07-23 15:28:46,921 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 64 [2022-07-23 15:28:46,921 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 69 [2022-07-23 15:28:46,921 INFO L73 IsDeterministic]: Start isDeterministic. Operand 108 states and 152 transitions. [2022-07-23 15:28:46,921 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-07-23 15:28:46,921 INFO L369 hiAutomatonCegarLoop]: Abstraction has 108 states and 152 transitions. [2022-07-23 15:28:46,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states and 152 transitions. [2022-07-23 15:28:46,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 94. [2022-07-23 15:28:46,929 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) [2022-07-23 15:28:46,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 126 transitions. [2022-07-23 15:28:46,930 INFO L392 hiAutomatonCegarLoop]: Abstraction has 94 states and 126 transitions. [2022-07-23 15:28:46,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 15:28:46,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-23 15:28:46,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-07-23 15:28:46,931 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) [2022-07-23 15:28:47,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 15:28:47,009 INFO L93 Difference]: Finished difference Result 123 states and 165 transitions. [2022-07-23 15:28:47,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-23 15:28:47,010 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 123 states and 165 transitions. [2022-07-23 15:28:47,012 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2022-07-23 15:28:47,014 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 123 states to 118 states and 160 transitions. [2022-07-23 15:28:47,014 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 77 [2022-07-23 15:28:47,014 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 77 [2022-07-23 15:28:47,014 INFO L73 IsDeterministic]: Start isDeterministic. Operand 118 states and 160 transitions. [2022-07-23 15:28:47,015 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-07-23 15:28:47,015 INFO L369 hiAutomatonCegarLoop]: Abstraction has 118 states and 160 transitions. [2022-07-23 15:28:47,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states and 160 transitions. [2022-07-23 15:28:47,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 106. [2022-07-23 15:28:47,021 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) [2022-07-23 15:28:47,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 141 transitions. [2022-07-23 15:28:47,023 INFO L392 hiAutomatonCegarLoop]: Abstraction has 106 states and 141 transitions. [2022-07-23 15:28:47,023 INFO L374 stractBuchiCegarLoop]: Abstraction has 106 states and 141 transitions. [2022-07-23 15:28:47,023 INFO L287 stractBuchiCegarLoop]: ======== Iteration 4 ============ [2022-07-23 15:28:47,023 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 106 states and 141 transitions. [2022-07-23 15:28:47,024 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2022-07-23 15:28:47,024 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-07-23 15:28:47,024 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-07-23 15:28:47,025 INFO L179 hiAutomatonCegarLoop]: Counterexample stem histogram [6, 5, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 15:28:47,025 INFO L180 hiAutomatonCegarLoop]: Counterexample loop histogram [6, 5, 5, 3, 3, 3, 3, 2, 2, 2, 1] [2022-07-23 15:28:47,026 INFO L752 eck$LassoCheckResult]: Stem: 789#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(12, 2);call #Ultimate.allocInit(12, 3); 790#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~ret6#1, main_~x~0#1, main_~result~0#1;main_~x~0#1 := 10; 804#L27 call main_#t~ret6#1 := fibo(main_~x~0#1);< 806#fiboENTRY ~n := #in~n; 854#L8 assume !(~n < 1); 853#L10 assume !(1 == ~n); 803#L13 call #t~ret4 := fibo(~n - 1);< 805#fiboENTRY ~n := #in~n; 815#L8 assume !(~n < 1); 820#L10 assume !(1 == ~n); 826#L13 call #t~ret4 := fibo(~n - 1);< 847#fiboENTRY ~n := #in~n; 851#L8 assume !(~n < 1); 849#L10 assume !(1 == ~n); 843#L13 call #t~ret4 := fibo(~n - 1);< 847#fiboENTRY ~n := #in~n; 851#L8 assume !(~n < 1); 849#L10 assume !(1 == ~n); 843#L13 call #t~ret4 := fibo(~n - 1);< 847#fiboENTRY ~n := #in~n; 852#L8 assume !(~n < 1); 850#L10 assume 1 == ~n;#res := 1; 848#fiboFINAL assume true; 846#fiboEXIT >#33#return; 792#L13-1 call #t~ret5 := fibo(~n - 2);< 844#fiboENTRY ~n := #in~n; 892#L8 assume ~n < 1;#res := 0; 891#fiboFINAL assume true; 890#fiboEXIT >#35#return; 889#L13-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 887#fiboFINAL assume true; 879#fiboEXIT >#33#return; 824#L13-1 [2022-07-23 15:28:47,026 INFO L754 eck$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 [2022-07-23 15:28:47,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 15:28:47,026 INFO L85 PathProgramCache]: Analyzing trace with hash -1730264506, now seen corresponding path program 1 times [2022-07-23 15:28:47,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 15:28:47,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267517973] [2022-07-23 15:28:47,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 15:28:47,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 15:28:47,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 15:28:47,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-23 15:28:47,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 15:28:47,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-23 15:28:47,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 15:28:47,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-23 15:28:47,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 15:28:47,112 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 45 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-23 15:28:47,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 15:28:47,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267517973] [2022-07-23 15:28:47,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267517973] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 15:28:47,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133822061] [2022-07-23 15:28:47,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 15:28:47,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 15:28:47,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 15:28:47,114 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) [2022-07-23 15:28:47,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 15:28:47,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-23 15:28:47,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-23 15:28:47,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 15:28:47,189 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 45 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-23 15:28:47,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 15:28:47,357 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 47 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-23 15:28:47,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133822061] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 15:28:47,357 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 15:28:47,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 12] total 22 [2022-07-23 15:28:47,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900237616] [2022-07-23 15:28:47,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 15:28:47,358 INFO L757 eck$LassoCheckResult]: stem already infeasible [2022-07-23 15:28:47,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 15:28:47,358 INFO L85 PathProgramCache]: Analyzing trace with hash 1616897917, now seen corresponding path program 1 times [2022-07-23 15:28:47,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 15:28:47,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222665605] [2022-07-23 15:28:47,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 15:28:47,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 15:28:47,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 15:28:47,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-23 15:28:47,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 15:28:47,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-23 15:28:47,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 15:28:47,410 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 [2022-07-23 15:28:47,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-23 15:28:47,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 15:28:47,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-23 15:28:47,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 15:28:47,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-23 15:28:47,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 15:28:47,442 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 26 proven. 13 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-23 15:28:47,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 15:28:47,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222665605] [2022-07-23 15:28:47,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222665605] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 15:28:47,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061021380] [2022-07-23 15:28:47,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 15:28:47,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 15:28:47,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 15:28:47,444 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) [2022-07-23 15:28:47,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-23 15:28:47,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 15:28:47,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-23 15:28:47,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 15:28:47,505 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 25 proven. 15 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-23 15:28:47,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 15:28:47,601 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 25 proven. 15 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-23 15:28:47,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061021380] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 15:28:47,602 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 15:28:47,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-07-23 15:28:47,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664582718] [2022-07-23 15:28:47,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 15:28:47,602 INFO L769 eck$LassoCheckResult]: loop already infeasible [2022-07-23 15:28:47,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 15:28:47,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-23 15:28:47,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2022-07-23 15:28:47,603 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) [2022-07-23 15:28:47,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 15:28:47,890 INFO L93 Difference]: Finished difference Result 174 states and 225 transitions. [2022-07-23 15:28:47,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-23 15:28:47,891 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 174 states and 225 transitions. [2022-07-23 15:28:47,893 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 15 [2022-07-23 15:28:47,895 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 174 states to 163 states and 214 transitions. [2022-07-23 15:28:47,895 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 110 [2022-07-23 15:28:47,895 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 110 [2022-07-23 15:28:47,895 INFO L73 IsDeterministic]: Start isDeterministic. Operand 163 states and 214 transitions. [2022-07-23 15:28:47,896 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-07-23 15:28:47,896 INFO L369 hiAutomatonCegarLoop]: Abstraction has 163 states and 214 transitions. [2022-07-23 15:28:47,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states and 214 transitions. [2022-07-23 15:28:47,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2022-07-23 15:28:47,903 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) [2022-07-23 15:28:47,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 214 transitions. [2022-07-23 15:28:47,904 INFO L392 hiAutomatonCegarLoop]: Abstraction has 163 states and 214 transitions. [2022-07-23 15:28:47,904 INFO L374 stractBuchiCegarLoop]: Abstraction has 163 states and 214 transitions. [2022-07-23 15:28:47,904 INFO L287 stractBuchiCegarLoop]: ======== Iteration 5 ============ [2022-07-23 15:28:47,904 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 163 states and 214 transitions. [2022-07-23 15:28:47,907 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 15 [2022-07-23 15:28:47,907 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-07-23 15:28:47,907 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-07-23 15:28:47,908 INFO L179 hiAutomatonCegarLoop]: Counterexample stem histogram [10, 9, 8, 8, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 15:28:47,908 INFO L180 hiAutomatonCegarLoop]: Counterexample loop histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2022-07-23 15:28:47,908 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 [2022-07-23 15:28:47,909 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 [2022-07-23 15:28:47,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 15:28:47,909 INFO L85 PathProgramCache]: Analyzing trace with hash -1960159334, now seen corresponding path program 2 times [2022-07-23 15:28:47,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 15:28:47,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807840712] [2022-07-23 15:28:47,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 15:28:47,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 15:28:47,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 15:28:48,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-23 15:28:48,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 15:28:48,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-23 15:28:48,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 15:28:48,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-23 15:28:48,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 15:28:48,137 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 2 proven. 153 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-23 15:28:48,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 15:28:48,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807840712] [2022-07-23 15:28:48,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807840712] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 15:28:48,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480473188] [2022-07-23 15:28:48,137 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-23 15:28:48,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 15:28:48,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 15:28:48,163 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) [2022-07-23 15:28:48,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-23 15:28:48,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-23 15:28:48,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 15:28:48,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-23 15:28:48,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 15:28:48,261 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 2 proven. 153 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-23 15:28:48,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 15:28:48,433 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 2 proven. 155 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-23 15:28:48,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480473188] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 15:28:48,434 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 15:28:48,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 20] total 23 [2022-07-23 15:28:48,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979350710] [2022-07-23 15:28:48,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 15:28:48,436 INFO L757 eck$LassoCheckResult]: stem already infeasible [2022-07-23 15:28:48,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 15:28:48,439 INFO L85 PathProgramCache]: Analyzing trace with hash 780094678, now seen corresponding path program 2 times [2022-07-23 15:28:48,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 15:28:48,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457421493] [2022-07-23 15:28:48,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 15:28:48,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 15:28:48,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-23 15:28:48,455 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-23 15:28:48,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-23 15:28:48,487 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-23 15:28:48,645 INFO L210 LassoAnalysis]: Preferences: [2022-07-23 15:28:48,645 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-07-23 15:28:48,645 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-07-23 15:28:48,645 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-07-23 15:28:48,645 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2022-07-23 15:28:48,645 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-23 15:28:48,645 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-07-23 15:28:48,645 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-07-23 15:28:48,645 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration5_Loop [2022-07-23 15:28:48,645 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-07-23 15:28:48,645 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-07-23 15:28:48,646 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-23 15:28:48,647 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-23 15:28:48,648 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-23 15:28:48,660 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-23 15:28:48,684 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-07-23 15:28:48,684 INFO L404 LassoAnalysis]: Checking for nontermination... [2022-07-23 15:28:48,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-23 15:28:48,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 15:28:48,712 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) [2022-07-23 15:28:48,718 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 [2022-07-23 15:28:48,719 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-23 15:28:48,719 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-23 15:28:48,727 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-07-23 15:28:48,727 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret4=1} Honda state: {fibo_#t~ret4=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-07-23 15:28:48,743 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 [2022-07-23 15:28:48,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-23 15:28:48,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 15:28:48,745 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) [2022-07-23 15:28:48,746 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 [2022-07-23 15:28:48,747 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-23 15:28:48,747 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-23 15:28:48,767 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-07-23 15:28:48,767 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-07-23 15:28:48,782 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 [2022-07-23 15:28:48,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-23 15:28:48,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 15:28:48,784 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) [2022-07-23 15:28:48,785 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 [2022-07-23 15:28:48,786 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-23 15:28:48,786 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-23 15:28:48,824 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Forceful destruction successful, exit code 0 [2022-07-23 15:28:48,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-23 15:28:48,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 15:28:48,825 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) [2022-07-23 15:28:48,826 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 [2022-07-23 15:28:48,827 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2022-07-23 15:28:48,827 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-23 15:28:49,751 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2022-07-23 15:28:49,755 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Forceful destruction successful, exit code 0 [2022-07-23 15:28:49,755 INFO L210 LassoAnalysis]: Preferences: [2022-07-23 15:28:49,755 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-07-23 15:28:49,755 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-07-23 15:28:49,755 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-07-23 15:28:49,755 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2022-07-23 15:28:49,756 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-23 15:28:49,756 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-07-23 15:28:49,756 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-07-23 15:28:49,756 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration5_Loop [2022-07-23 15:28:49,756 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-07-23 15:28:49,756 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-07-23 15:28:49,756 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-23 15:28:49,758 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-23 15:28:49,760 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-23 15:28:49,761 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-23 15:28:49,787 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-07-23 15:28:49,787 INFO L490 LassoAnalysis]: Using template 'affine'. [2022-07-23 15:28:49,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-23 15:28:49,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 15:28:49,788 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) [2022-07-23 15:28:49,789 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 [2022-07-23 15:28:49,790 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 [2022-07-23 15:28:49,795 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-23 15:28:49,795 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-23 15:28:49,795 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-23 15:28:49,795 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-23 15:28:49,795 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-23 15:28:49,796 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-23 15:28:49,796 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-23 15:28:49,811 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-07-23 15:28:49,826 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Forceful destruction successful, exit code 0 [2022-07-23 15:28:49,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-23 15:28:49,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 15:28:49,827 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) [2022-07-23 15:28:49,834 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2022-07-23 15:28:49,840 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-23 15:28:49,840 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-23 15:28:49,840 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-23 15:28:49,840 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-23 15:28:49,840 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-23 15:28:49,841 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-23 15:28:49,841 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-23 15:28:49,844 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 [2022-07-23 15:28:49,851 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-07-23 15:28:49,866 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 [2022-07-23 15:28:49,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-23 15:28:49,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 15:28:49,867 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) [2022-07-23 15:28:49,879 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 [2022-07-23 15:28:49,880 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 [2022-07-23 15:28:49,885 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-23 15:28:49,885 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-23 15:28:49,885 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-23 15:28:49,885 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-23 15:28:49,885 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-23 15:28:49,886 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-23 15:28:49,886 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-23 15:28:49,895 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-07-23 15:28:49,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Forceful destruction successful, exit code 0 [2022-07-23 15:28:49,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-23 15:28:49,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 15:28:49,913 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) [2022-07-23 15:28:49,925 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 [2022-07-23 15:28:49,925 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 [2022-07-23 15:28:49,931 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-23 15:28:49,931 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-23 15:28:49,931 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-23 15:28:49,931 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-23 15:28:49,931 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-23 15:28:49,933 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-23 15:28:49,933 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-23 15:28:49,934 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2022-07-23 15:28:49,936 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2022-07-23 15:28:49,937 INFO L444 ModelExtractionUtils]: 2 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. [2022-07-23 15:28:49,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-23 15:28:49,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 15:28:49,938 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) [2022-07-23 15:28:49,940 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2022-07-23 15:28:49,940 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2022-07-23 15:28:49,940 INFO L513 LassoAnalysis]: Proved termination. [2022-07-23 15:28:49,940 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2022-07-23 15:28:49,953 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 [2022-07-23 15:28:49,954 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 [2022-07-23 15:28:49,955 INFO L293 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2022-07-23 15:28:49,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 15:28:50,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 15:28:50,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-23 15:28:50,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 15:28:50,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 15:28:50,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-23 15:28:50,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 15:28:50,288 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-23 15:28:50,289 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 [2022-07-23 15:28:50,289 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) [2022-07-23 15:28:50,431 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. [2022-07-23 15:28:50,432 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 [2022-07-23 15:28:50,432 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) [2022-07-23 15:28:50,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 41 transitions. [2022-07-23 15:28:50,433 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 41 transitions. Stem has 48 letters. Loop has 22 letters. [2022-07-23 15:28:50,433 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-23 15:28:50,433 INFO L577 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2022-07-23 15:28:50,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 15:28:50,463 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 [2022-07-23 15:28:50,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 15:28:50,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-23 15:28:50,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 15:28:50,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 15:28:50,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-23 15:28:50,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 15:28:50,725 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-23 15:28:50,725 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 [2022-07-23 15:28:50,725 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) [2022-07-23 15:28:50,798 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. [2022-07-23 15:28:50,798 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 [2022-07-23 15:28:50,798 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) [2022-07-23 15:28:50,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 24 transitions. [2022-07-23 15:28:50,799 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 24 transitions. Stem has 48 letters. Loop has 22 letters. [2022-07-23 15:28:50,799 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-23 15:28:50,799 INFO L577 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2022-07-23 15:28:50,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 15:28:50,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 15:28:50,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-23 15:28:50,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 15:28:50,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 15:28:50,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-23 15:28:50,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 15:28:51,039 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-23 15:28:51,040 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 [2022-07-23 15:28:51,040 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) [2022-07-23 15:28:51,168 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. [2022-07-23 15:28:51,193 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 [2022-07-23 15:28:51,194 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) [2022-07-23 15:28:51,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 46 transitions. [2022-07-23 15:28:51,194 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 46 transitions. Stem has 48 letters. Loop has 22 letters. [2022-07-23 15:28:51,195 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-23 15:28:51,195 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 46 transitions. Stem has 70 letters. Loop has 22 letters. [2022-07-23 15:28:51,195 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-23 15:28:51,195 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 46 transitions. Stem has 48 letters. Loop has 44 letters. [2022-07-23 15:28:51,196 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-23 15:28:51,196 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1282 states and 1787 transitions. [2022-07-23 15:28:51,217 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 58 [2022-07-23 15:28:51,229 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1282 states to 770 states and 1148 transitions. [2022-07-23 15:28:51,239 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 300 [2022-07-23 15:28:51,240 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 338 [2022-07-23 15:28:51,240 INFO L73 IsDeterministic]: Start isDeterministic. Operand 770 states and 1148 transitions. [2022-07-23 15:28:51,241 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-07-23 15:28:51,241 INFO L369 hiAutomatonCegarLoop]: Abstraction has 770 states and 1148 transitions. [2022-07-23 15:28:51,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 770 states and 1148 transitions. [2022-07-23 15:28:51,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 770 to 615. [2022-07-23 15:28:51,298 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) [2022-07-23 15:28:51,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 615 states to 615 states and 867 transitions. [2022-07-23 15:28:51,302 INFO L392 hiAutomatonCegarLoop]: Abstraction has 615 states and 867 transitions. [2022-07-23 15:28:51,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 15:28:51,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-23 15:28:51,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2022-07-23 15:28:51,303 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) [2022-07-23 15:28:51,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 15:28:51,571 INFO L93 Difference]: Finished difference Result 747 states and 1037 transitions. [2022-07-23 15:28:51,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-23 15:28:51,571 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 747 states and 1037 transitions. [2022-07-23 15:28:51,578 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2022-07-23 15:28:51,585 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 747 states to 739 states and 1022 transitions. [2022-07-23 15:28:51,585 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 309 [2022-07-23 15:28:51,585 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 312 [2022-07-23 15:28:51,586 INFO L73 IsDeterministic]: Start isDeterministic. Operand 739 states and 1022 transitions. [2022-07-23 15:28:51,586 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-07-23 15:28:51,586 INFO L369 hiAutomatonCegarLoop]: Abstraction has 739 states and 1022 transitions. [2022-07-23 15:28:51,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 739 states and 1022 transitions. [2022-07-23 15:28:51,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 739 to 713. [2022-07-23 15:28:51,599 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) [2022-07-23 15:28:51,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 994 transitions. [2022-07-23 15:28:51,628 INFO L392 hiAutomatonCegarLoop]: Abstraction has 713 states and 994 transitions. [2022-07-23 15:28:51,628 INFO L374 stractBuchiCegarLoop]: Abstraction has 713 states and 994 transitions. [2022-07-23 15:28:51,628 INFO L287 stractBuchiCegarLoop]: ======== Iteration 6 ============ [2022-07-23 15:28:51,628 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 713 states and 994 transitions. [2022-07-23 15:28:51,631 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2022-07-23 15:28:51,631 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-07-23 15:28:51,632 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-07-23 15:28:51,632 INFO L179 hiAutomatonCegarLoop]: Counterexample stem histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 15:28:51,632 INFO L180 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2022-07-23 15:28:51,633 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 [2022-07-23 15:28:51,633 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 [2022-07-23 15:28:51,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 15:28:51,633 INFO L85 PathProgramCache]: Analyzing trace with hash 134483699, now seen corresponding path program 1 times [2022-07-23 15:28:51,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 15:28:51,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983325885] [2022-07-23 15:28:51,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 15:28:51,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 15:28:51,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 15:28:51,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-07-23 15:28:51,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 15:28:51,788 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 70 proven. 136 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-23 15:28:51,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 15:28:51,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983325885] [2022-07-23 15:28:51,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983325885] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 15:28:51,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794815458] [2022-07-23 15:28:51,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 15:28:51,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 15:28:51,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 15:28:51,790 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) [2022-07-23 15:28:51,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-07-23 15:28:51,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 15:28:51,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-23 15:28:51,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 15:28:51,888 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 70 proven. 136 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-23 15:28:51,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 15:28:51,972 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 70 proven. 136 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-23 15:28:51,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794815458] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 15:28:51,973 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 15:28:51,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 23 [2022-07-23 15:28:51,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115047631] [2022-07-23 15:28:51,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 15:28:51,974 INFO L757 eck$LassoCheckResult]: stem already infeasible [2022-07-23 15:28:51,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 15:28:51,974 INFO L85 PathProgramCache]: Analyzing trace with hash 1450956, now seen corresponding path program 2 times [2022-07-23 15:28:51,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 15:28:51,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338169808] [2022-07-23 15:28:51,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 15:28:51,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 15:28:51,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-23 15:28:51,976 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-23 15:28:51,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-23 15:28:51,978 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-23 15:28:51,999 INFO L210 LassoAnalysis]: Preferences: [2022-07-23 15:28:51,999 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-07-23 15:28:51,999 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-07-23 15:28:51,999 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-07-23 15:28:51,999 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2022-07-23 15:28:52,000 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-23 15:28:52,000 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-07-23 15:28:52,000 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-07-23 15:28:52,000 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration6_Loop [2022-07-23 15:28:52,000 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-07-23 15:28:52,000 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-07-23 15:28:52,000 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-23 15:28:52,002 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-23 15:28:52,003 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-23 15:28:52,005 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-23 15:28:52,006 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-23 15:28:52,036 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-07-23 15:28:52,036 INFO L404 LassoAnalysis]: Checking for nontermination... [2022-07-23 15:28:52,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-23 15:28:52,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 15:28:52,037 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) [2022-07-23 15:28:52,039 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-23 15:28:52,039 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-23 15:28:52,048 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 [2022-07-23 15:28:52,056 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-07-23 15:28:52,057 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret4=0} Honda state: {fibo_#t~ret4=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-07-23 15:28:52,071 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (34)] Ended with exit code 0 [2022-07-23 15:28:52,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-23 15:28:52,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 15:28:52,077 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) [2022-07-23 15:28:52,078 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 [2022-07-23 15:28:52,079 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-23 15:28:52,079 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-23 15:28:52,085 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-07-23 15:28:52,085 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_~n=0} Honda state: {fibo_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-07-23 15:28:52,102 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 [2022-07-23 15:28:52,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-23 15:28:52,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 15:28:52,103 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) [2022-07-23 15:28:52,104 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 [2022-07-23 15:28:52,105 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-23 15:28:52,105 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-23 15:28:52,126 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-07-23 15:28:52,126 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-07-23 15:28:52,143 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (36)] Forceful destruction successful, exit code 0 [2022-07-23 15:28:52,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-23 15:28:52,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 15:28:52,144 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) [2022-07-23 15:28:52,145 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 [2022-07-23 15:28:52,147 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-23 15:28:52,147 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-23 15:28:52,153 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-07-23 15:28:52,153 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret5=0} Honda state: {fibo_#t~ret5=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-07-23 15:28:52,168 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (37)] Forceful destruction successful, exit code 0 [2022-07-23 15:28:52,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-23 15:28:52,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 15:28:52,169 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) [2022-07-23 15:28:52,170 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 [2022-07-23 15:28:52,171 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-23 15:28:52,171 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-23 15:28:52,204 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (38)] Forceful destruction successful, exit code 0 [2022-07-23 15:28:52,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-23 15:28:52,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 15:28:52,206 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) [2022-07-23 15:28:52,207 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 [2022-07-23 15:28:52,207 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2022-07-23 15:28:52,208 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-23 15:28:52,258 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2022-07-23 15:28:52,262 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 [2022-07-23 15:28:52,262 INFO L210 LassoAnalysis]: Preferences: [2022-07-23 15:28:52,263 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-07-23 15:28:52,263 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-07-23 15:28:52,263 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-07-23 15:28:52,263 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2022-07-23 15:28:52,263 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-23 15:28:52,263 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-07-23 15:28:52,263 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-07-23 15:28:52,263 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration6_Loop [2022-07-23 15:28:52,263 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-07-23 15:28:52,263 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-07-23 15:28:52,263 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-23 15:28:52,265 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-23 15:28:52,266 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-23 15:28:52,275 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-23 15:28:52,276 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-23 15:28:52,304 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-07-23 15:28:52,307 INFO L490 LassoAnalysis]: Using template 'affine'. [2022-07-23 15:28:52,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-23 15:28:52,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 15:28:52,308 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) [2022-07-23 15:28:52,313 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 [2022-07-23 15:28:52,314 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 [2022-07-23 15:28:52,320 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-23 15:28:52,320 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-23 15:28:52,320 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-23 15:28:52,320 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-23 15:28:52,320 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-23 15:28:52,321 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-23 15:28:52,321 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-23 15:28:52,323 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-07-23 15:28:52,347 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (40)] Forceful destruction successful, exit code 0 [2022-07-23 15:28:52,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-23 15:28:52,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 15:28:52,348 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) [2022-07-23 15:28:52,349 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 [2022-07-23 15:28:52,350 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 [2022-07-23 15:28:52,355 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-23 15:28:52,355 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-23 15:28:52,355 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-23 15:28:52,355 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-23 15:28:52,356 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-23 15:28:52,356 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-23 15:28:52,356 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-23 15:28:52,371 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-07-23 15:28:52,388 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 [2022-07-23 15:28:52,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-23 15:28:52,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 15:28:52,389 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) [2022-07-23 15:28:52,391 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 [2022-07-23 15:28:52,391 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 [2022-07-23 15:28:52,397 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-23 15:28:52,397 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-23 15:28:52,397 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-23 15:28:52,397 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-23 15:28:52,397 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-23 15:28:52,398 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-23 15:28:52,398 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-23 15:28:52,399 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-07-23 15:28:52,414 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 [2022-07-23 15:28:52,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-23 15:28:52,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 15:28:52,415 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) [2022-07-23 15:28:52,416 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 [2022-07-23 15:28:52,417 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 [2022-07-23 15:28:52,422 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-23 15:28:52,422 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-23 15:28:52,422 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-23 15:28:52,422 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-23 15:28:52,422 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-23 15:28:52,423 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-23 15:28:52,423 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-23 15:28:52,424 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-07-23 15:28:52,439 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (43)] Forceful destruction successful, exit code 0 [2022-07-23 15:28:52,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-23 15:28:52,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 15:28:52,440 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) [2022-07-23 15:28:52,441 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 [2022-07-23 15:28:52,441 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 [2022-07-23 15:28:52,446 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-23 15:28:52,447 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-23 15:28:52,447 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-23 15:28:52,447 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-23 15:28:52,447 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-23 15:28:52,448 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-23 15:28:52,448 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-23 15:28:52,449 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2022-07-23 15:28:52,452 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2022-07-23 15:28:52,453 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2022-07-23 15:28:52,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-23 15:28:52,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 15:28:52,454 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) [2022-07-23 15:28:52,454 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 [2022-07-23 15:28:52,455 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2022-07-23 15:28:52,455 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2022-07-23 15:28:52,455 INFO L513 LassoAnalysis]: Proved termination. [2022-07-23 15:28:52,455 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_#in~n) = 1*fibo_#in~n Supporting invariants [] [2022-07-23 15:28:52,470 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 [2022-07-23 15:28:52,470 INFO L293 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2022-07-23 15:28:52,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 15:28:52,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 15:28:52,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-23 15:28:52,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 15:28:52,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 15:28:52,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-23 15:28:52,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 15:28:52,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 15:28:52,629 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 [2022-07-23 15:28:52,630 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) [2022-07-23 15:28:52,673 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. [2022-07-23 15:28:52,674 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 [2022-07-23 15:28:52,674 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) [2022-07-23 15:28:52,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 13 transitions. [2022-07-23 15:28:52,674 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 13 transitions. Stem has 49 letters. Loop has 4 letters. [2022-07-23 15:28:52,674 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-23 15:28:52,675 INFO L577 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2022-07-23 15:28:52,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 15:28:52,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 15:28:52,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-23 15:28:52,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 15:28:52,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 15:28:52,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-23 15:28:52,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 15:28:52,834 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 [2022-07-23 15:28:52,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 15:28:52,852 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 [2022-07-23 15:28:52,852 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) [2022-07-23 15:28:52,894 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. [2022-07-23 15:28:52,894 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 [2022-07-23 15:28:52,895 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) [2022-07-23 15:28:52,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 13 transitions. [2022-07-23 15:28:52,895 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 13 transitions. Stem has 49 letters. Loop has 4 letters. [2022-07-23 15:28:52,895 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-23 15:28:52,895 INFO L577 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2022-07-23 15:28:52,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 15:28:52,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 15:28:52,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-23 15:28:52,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 15:28:53,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 15:28:53,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-23 15:28:53,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 15:28:53,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 15:28:53,063 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 [2022-07-23 15:28:53,063 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) [2022-07-23 15:28:53,116 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. [2022-07-23 15:28:53,116 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 [2022-07-23 15:28:53,117 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) [2022-07-23 15:28:53,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 21 transitions. [2022-07-23 15:28:53,117 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 49 letters. Loop has 4 letters. [2022-07-23 15:28:53,117 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-23 15:28:53,117 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 53 letters. Loop has 4 letters. [2022-07-23 15:28:53,118 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-23 15:28:53,118 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 49 letters. Loop has 8 letters. [2022-07-23 15:28:53,118 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-23 15:28:53,118 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 959 states and 1259 transitions. [2022-07-23 15:28:53,125 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2022-07-23 15:28:53,131 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 959 states to 770 states and 1058 transitions. [2022-07-23 15:28:53,131 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 254 [2022-07-23 15:28:53,132 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 263 [2022-07-23 15:28:53,132 INFO L73 IsDeterministic]: Start isDeterministic. Operand 770 states and 1058 transitions. [2022-07-23 15:28:53,132 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-07-23 15:28:53,132 INFO L369 hiAutomatonCegarLoop]: Abstraction has 770 states and 1058 transitions. [2022-07-23 15:28:53,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 770 states and 1058 transitions. [2022-07-23 15:28:53,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 770 to 737. [2022-07-23 15:28:53,143 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) [2022-07-23 15:28:53,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 1018 transitions. [2022-07-23 15:28:53,146 INFO L392 hiAutomatonCegarLoop]: Abstraction has 737 states and 1018 transitions. [2022-07-23 15:28:53,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 15:28:53,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-23 15:28:53,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2022-07-23 15:28:53,147 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) [2022-07-23 15:28:53,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 15:28:53,392 INFO L93 Difference]: Finished difference Result 879 states and 1234 transitions. [2022-07-23 15:28:53,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-23 15:28:53,392 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 879 states and 1234 transitions. [2022-07-23 15:28:53,399 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2022-07-23 15:28:53,405 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 879 states to 857 states and 1204 transitions. [2022-07-23 15:28:53,405 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 298 [2022-07-23 15:28:53,405 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 301 [2022-07-23 15:28:53,405 INFO L73 IsDeterministic]: Start isDeterministic. Operand 857 states and 1204 transitions. [2022-07-23 15:28:53,405 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-07-23 15:28:53,405 INFO L369 hiAutomatonCegarLoop]: Abstraction has 857 states and 1204 transitions. [2022-07-23 15:28:53,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 857 states and 1204 transitions. [2022-07-23 15:28:53,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 857 to 789. [2022-07-23 15:28:53,417 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) [2022-07-23 15:28:53,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 789 states to 789 states and 1073 transitions. [2022-07-23 15:28:53,420 INFO L392 hiAutomatonCegarLoop]: Abstraction has 789 states and 1073 transitions. [2022-07-23 15:28:53,420 INFO L374 stractBuchiCegarLoop]: Abstraction has 789 states and 1073 transitions. [2022-07-23 15:28:53,420 INFO L287 stractBuchiCegarLoop]: ======== Iteration 7 ============ [2022-07-23 15:28:53,420 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 789 states and 1073 transitions. [2022-07-23 15:28:53,423 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2022-07-23 15:28:53,423 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-07-23 15:28:53,423 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-07-23 15:28:53,424 INFO L179 hiAutomatonCegarLoop]: Counterexample stem histogram [13, 13, 12, 11, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 15:28:53,424 INFO L180 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2022-07-23 15:28:53,424 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 [2022-07-23 15:28:53,424 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 [2022-07-23 15:28:53,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 15:28:53,424 INFO L85 PathProgramCache]: Analyzing trace with hash -486527177, now seen corresponding path program 2 times [2022-07-23 15:28:53,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 15:28:53,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512670433] [2022-07-23 15:28:53,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 15:28:53,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 15:28:53,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 15:28:53,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-23 15:28:53,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 15:28:53,594 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 256 proven. 27 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-23 15:28:53,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 15:28:53,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512670433] [2022-07-23 15:28:53,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512670433] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 15:28:53,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722381022] [2022-07-23 15:28:53,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-23 15:28:53,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 15:28:53,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 15:28:53,612 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) [2022-07-23 15:28:53,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-07-23 15:28:53,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-23 15:28:53,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 15:28:53,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-23 15:28:53,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 15:28:53,721 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 256 proven. 27 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-23 15:28:53,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 15:28:53,765 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 256 proven. 27 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-23 15:28:53,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722381022] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 15:28:53,765 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 15:28:53,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 23 [2022-07-23 15:28:53,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376072331] [2022-07-23 15:28:53,765 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 15:28:53,766 INFO L757 eck$LassoCheckResult]: stem already infeasible [2022-07-23 15:28:53,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 15:28:53,766 INFO L85 PathProgramCache]: Analyzing trace with hash 1893846, now seen corresponding path program 3 times [2022-07-23 15:28:53,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 15:28:53,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417656800] [2022-07-23 15:28:53,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 15:28:53,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 15:28:53,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-23 15:28:53,768 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-23 15:28:53,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-23 15:28:53,769 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-23 15:28:53,798 INFO L210 LassoAnalysis]: Preferences: [2022-07-23 15:28:53,798 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-07-23 15:28:53,798 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-07-23 15:28:53,798 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-07-23 15:28:53,798 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2022-07-23 15:28:53,798 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-23 15:28:53,798 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-07-23 15:28:53,798 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-07-23 15:28:53,798 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration7_Loop [2022-07-23 15:28:53,798 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-07-23 15:28:53,799 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-07-23 15:28:53,799 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-23 15:28:53,804 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-23 15:28:53,805 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-23 15:28:53,806 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-23 15:28:53,835 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-07-23 15:28:53,835 INFO L404 LassoAnalysis]: Checking for nontermination... [2022-07-23 15:28:53,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-23 15:28:53,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 15:28:53,845 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) [2022-07-23 15:28:53,845 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 [2022-07-23 15:28:53,847 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-23 15:28:53,847 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-23 15:28:53,872 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 [2022-07-23 15:28:53,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-23 15:28:53,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 15:28:53,874 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) [2022-07-23 15:28:53,875 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 [2022-07-23 15:28:53,876 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2022-07-23 15:28:53,876 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-23 15:28:55,534 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2022-07-23 15:28:55,537 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (48)] Forceful destruction successful, exit code 0 [2022-07-23 15:28:55,538 INFO L210 LassoAnalysis]: Preferences: [2022-07-23 15:28:55,538 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-07-23 15:28:55,538 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-07-23 15:28:55,538 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-07-23 15:28:55,538 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2022-07-23 15:28:55,538 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-23 15:28:55,538 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-07-23 15:28:55,538 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-07-23 15:28:55,538 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-1.c_Iteration7_Loop [2022-07-23 15:28:55,538 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-07-23 15:28:55,538 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-07-23 15:28:55,538 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-23 15:28:55,540 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-23 15:28:55,541 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-23 15:28:55,543 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-23 15:28:55,576 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-07-23 15:28:55,576 INFO L490 LassoAnalysis]: Using template 'affine'. [2022-07-23 15:28:55,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-23 15:28:55,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 15:28:55,577 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) [2022-07-23 15:28:55,578 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 [2022-07-23 15:28:55,579 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 [2022-07-23 15:28:55,584 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-23 15:28:55,584 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-23 15:28:55,584 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-23 15:28:55,584 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-23 15:28:55,584 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-23 15:28:55,585 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-23 15:28:55,585 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-23 15:28:55,600 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-07-23 15:28:55,615 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 [2022-07-23 15:28:55,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-23 15:28:55,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 15:28:55,616 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) [2022-07-23 15:28:55,617 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 [2022-07-23 15:28:55,618 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2022-07-23 15:28:55,623 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-23 15:28:55,623 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-23 15:28:55,623 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-23 15:28:55,623 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-23 15:28:55,623 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-23 15:28:55,624 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-23 15:28:55,624 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-23 15:28:55,630 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-07-23 15:28:55,645 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 [2022-07-23 15:28:55,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-23 15:28:55,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 15:28:55,646 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) [2022-07-23 15:28:55,646 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 [2022-07-23 15:28:55,648 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 [2022-07-23 15:28:55,652 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-23 15:28:55,653 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-23 15:28:55,653 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-23 15:28:55,653 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-23 15:28:55,653 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-23 15:28:55,653 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-23 15:28:55,653 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-23 15:28:55,669 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-07-23 15:28:55,683 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (51)] Ended with exit code 0 [2022-07-23 15:28:55,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-23 15:28:55,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 15:28:55,684 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) [2022-07-23 15:28:55,685 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 [2022-07-23 15:28:55,686 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 [2022-07-23 15:28:55,691 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-23 15:28:55,691 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-23 15:28:55,691 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-23 15:28:55,691 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-23 15:28:55,691 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-23 15:28:55,692 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-23 15:28:55,692 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-23 15:28:55,694 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2022-07-23 15:28:55,698 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2022-07-23 15:28:55,698 INFO L444 ModelExtractionUtils]: 2 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. [2022-07-23 15:28:55,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-23 15:28:55,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 15:28:55,699 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) [2022-07-23 15:28:55,700 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 [2022-07-23 15:28:55,700 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2022-07-23 15:28:55,701 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2022-07-23 15:28:55,701 INFO L513 LassoAnalysis]: Proved termination. [2022-07-23 15:28:55,701 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2022-07-23 15:28:55,715 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 [2022-07-23 15:28:55,715 INFO L293 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2022-07-23 15:28:55,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 15:28:55,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 15:28:55,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-23 15:28:55,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 15:28:55,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 15:28:55,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-23 15:28:55,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 15:28:55,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 15:28:55,883 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 [2022-07-23 15:28:55,883 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) [2022-07-23 15:28:55,919 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. [2022-07-23 15:28:55,919 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 [2022-07-23 15:28:55,919 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) [2022-07-23 15:28:55,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 13 transitions. [2022-07-23 15:28:55,920 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 13 transitions. Stem has 56 letters. Loop has 4 letters. [2022-07-23 15:28:55,920 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-23 15:28:55,920 INFO L577 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2022-07-23 15:28:55,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 15:28:55,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 15:28:55,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-23 15:28:55,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 15:28:56,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 15:28:56,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-23 15:28:56,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 15:28:56,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 15:28:56,087 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 [2022-07-23 15:28:56,087 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) [2022-07-23 15:28:56,142 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. [2022-07-23 15:28:56,142 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 [2022-07-23 15:28:56,142 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) [2022-07-23 15:28:56,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 16 transitions. [2022-07-23 15:28:56,143 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 56 letters. Loop has 4 letters. [2022-07-23 15:28:56,143 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-23 15:28:56,143 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 60 letters. Loop has 4 letters. [2022-07-23 15:28:56,143 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-23 15:28:56,143 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 56 letters. Loop has 8 letters. [2022-07-23 15:28:56,143 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-23 15:28:56,143 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1046 states and 1417 transitions. [2022-07-23 15:28:56,149 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2022-07-23 15:28:56,154 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1046 states to 967 states and 1333 transitions. [2022-07-23 15:28:56,154 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 299 [2022-07-23 15:28:56,155 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 327 [2022-07-23 15:28:56,155 INFO L73 IsDeterministic]: Start isDeterministic. Operand 967 states and 1333 transitions. [2022-07-23 15:28:56,155 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-07-23 15:28:56,155 INFO L369 hiAutomatonCegarLoop]: Abstraction has 967 states and 1333 transitions. [2022-07-23 15:28:56,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 967 states and 1333 transitions. [2022-07-23 15:28:56,181 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 [2022-07-23 15:28:56,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 967 to 950. [2022-07-23 15:28:56,188 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) [2022-07-23 15:28:56,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 950 states to 950 states and 1308 transitions. [2022-07-23 15:28:56,196 INFO L392 hiAutomatonCegarLoop]: Abstraction has 950 states and 1308 transitions. [2022-07-23 15:28:56,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 15:28:56,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-23 15:28:56,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=373, Unknown=0, NotChecked=0, Total=506 [2022-07-23 15:28:56,197 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) [2022-07-23 15:28:56,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 15:28:56,415 INFO L93 Difference]: Finished difference Result 565 states and 661 transitions. [2022-07-23 15:28:56,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-23 15:28:56,416 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 565 states and 661 transitions. [2022-07-23 15:28:56,419 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2022-07-23 15:28:56,419 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 565 states to 0 states and 0 transitions. [2022-07-23 15:28:56,419 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2022-07-23 15:28:56,419 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2022-07-23 15:28:56,419 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2022-07-23 15:28:56,419 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-23 15:28:56,419 INFO L369 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-07-23 15:28:56,419 INFO L392 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-07-23 15:28:56,419 INFO L374 stractBuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-07-23 15:28:56,419 INFO L287 stractBuchiCegarLoop]: ======== Iteration 8 ============ [2022-07-23 15:28:56,420 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2022-07-23 15:28:56,420 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2022-07-23 15:28:56,420 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2022-07-23 15:28:56,427 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 23.07 03:28:56 BoogieIcfgContainer [2022-07-23 15:28:56,427 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2022-07-23 15:28:56,427 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-23 15:28:56,427 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-23 15:28:56,428 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-23 15:28:56,428 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 03:28:43" (3/4) ... [2022-07-23 15:28:56,430 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-07-23 15:28:56,430 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-23 15:28:56,432 INFO L158 Benchmark]: Toolchain (without parser) took 13026.35ms. Allocated memory was 134.2MB in the beginning and 197.1MB in the end (delta: 62.9MB). Free memory was 103.1MB in the beginning and 131.9MB in the end (delta: -28.8MB). Peak memory consumption was 33.9MB. Max. memory is 16.1GB. [2022-07-23 15:28:56,433 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 88.1MB. Free memory was 45.7MB in the beginning and 45.7MB in the end (delta: 36.4kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-23 15:28:56,434 INFO L158 Benchmark]: CACSL2BoogieTranslator took 239.42ms. Allocated memory is still 134.2MB. Free memory was 103.1MB in the beginning and 109.9MB in the end (delta: -6.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-23 15:28:56,434 INFO L158 Benchmark]: Boogie Procedure Inliner took 33.82ms. Allocated memory is still 134.2MB. Free memory was 109.9MB in the beginning and 108.3MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-23 15:28:56,434 INFO L158 Benchmark]: Boogie Preprocessor took 20.59ms. Allocated memory is still 134.2MB. Free memory was 108.3MB in the beginning and 107.5MB in the end (delta: 801.2kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-23 15:28:56,435 INFO L158 Benchmark]: RCFGBuilder took 266.64ms. Allocated memory is still 134.2MB. Free memory was 107.5MB in the beginning and 99.1MB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-23 15:28:56,435 INFO L158 Benchmark]: BuchiAutomizer took 12458.50ms. Allocated memory was 134.2MB in the beginning and 197.1MB in the end (delta: 62.9MB). Free memory was 98.7MB in the beginning and 131.9MB in the end (delta: -33.2MB). Peak memory consumption was 32.8MB. Max. memory is 16.1GB. [2022-07-23 15:28:56,436 INFO L158 Benchmark]: Witness Printer took 2.70ms. Allocated memory is still 197.1MB. Free memory is still 131.9MB. There was no memory consumed. Max. memory is 16.1GB. [2022-07-23 15:28:56,438 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 88.1MB. Free memory was 45.7MB in the beginning and 45.7MB in the end (delta: 36.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 239.42ms. Allocated memory is still 134.2MB. Free memory was 103.1MB in the beginning and 109.9MB in the end (delta: -6.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 33.82ms. Allocated memory is still 134.2MB. Free memory was 109.9MB in the beginning and 108.3MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 20.59ms. Allocated memory is still 134.2MB. Free memory was 108.3MB in the beginning and 107.5MB in the end (delta: 801.2kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 266.64ms. Allocated memory is still 134.2MB. Free memory was 107.5MB in the beginning and 99.1MB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * BuchiAutomizer took 12458.50ms. Allocated memory was 134.2MB in the beginning and 197.1MB in the end (delta: 62.9MB). Free memory was 98.7MB in the beginning and 131.9MB in the end (delta: -33.2MB). Peak memory consumption was 32.8MB. Max. memory is 16.1GB. * Witness Printer took 2.70ms. Allocated memory is still 197.1MB. Free memory is still 131.9MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 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 12.4s and 8 iterations. TraceHistogramMax:13. Analysis of lassos took 8.1s. Construction of modules took 0.8s. Büchi inclusion checks took 3.0s. 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, 1.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 671 mSDsluCounter, 812 SdHoareTripleChecker+Invalid, 0.8s 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: 32ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 11 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 5 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 4.0s InitialAbstractionConstructionTime: 0.0s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! [2022-07-23 15:28:56,467 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-07-23 15:28:56,668 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-07-23 15:28:56,868 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-07-23 15:28:57,068 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-07-23 15:28:57,268 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-23 15:28:57,469 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-23 15:28:57,670 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