./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/recursive-simple/fibo_10-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 35987657 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerTermination.xml -i ../sv-benchmarks/c/recursive-simple/fibo_10-2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(F end) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a6546395432109233bf3e1991428a566548dd822bb23ca198622322bf4db5a8a --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-22 02:40:09,173 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 02:40:09,176 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 02:40:09,203 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 02:40:09,203 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 02:40:09,205 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 02:40:09,208 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 02:40:09,211 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 02:40:09,212 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 02:40:09,216 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 02:40:09,217 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 02:40:09,219 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 02:40:09,219 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 02:40:09,220 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 02:40:09,222 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 02:40:09,226 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 02:40:09,227 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 02:40:09,228 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 02:40:09,230 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 02:40:09,235 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 02:40:09,236 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 02:40:09,237 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 02:40:09,239 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 02:40:09,240 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 02:40:09,241 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 02:40:09,243 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 02:40:09,243 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 02:40:09,244 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 02:40:09,245 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 02:40:09,245 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 02:40:09,246 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 02:40:09,246 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 02:40:09,247 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 02:40:09,248 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 02:40:09,249 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 02:40:09,250 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 02:40:09,250 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 02:40:09,250 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 02:40:09,250 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 02:40:09,251 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 02:40:09,251 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 02:40:09,252 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 02:40:09,259 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-32bit-Automizer_Default.epf [2022-07-22 02:40:09,281 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 02:40:09,282 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 02:40:09,282 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 02:40:09,282 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 02:40:09,283 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 02:40:09,283 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 02:40:09,284 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 02:40:09,284 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2022-07-22 02:40:09,284 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2022-07-22 02:40:09,285 INFO L138 SettingsManager]: * Use old map elimination=false [2022-07-22 02:40:09,285 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2022-07-22 02:40:09,285 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2022-07-22 02:40:09,285 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2022-07-22 02:40:09,293 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 02:40:09,293 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 02:40:09,293 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-22 02:40:09,293 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 02:40:09,293 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 02:40:09,293 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 02:40:09,293 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2022-07-22 02:40:09,294 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2022-07-22 02:40:09,294 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2022-07-22 02:40:09,294 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 02:40:09,294 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 02:40:09,294 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2022-07-22 02:40:09,294 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 02:40:09,295 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2022-07-22 02:40:09,295 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 02:40:09,295 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 02:40:09,295 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 02:40:09,295 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 02:40:09,297 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-07-22 02:40:09,298 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a6546395432109233bf3e1991428a566548dd822bb23ca198622322bf4db5a8a [2022-07-22 02:40:09,593 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 02:40:09,618 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 02:40:09,620 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 02:40:09,620 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 02:40:09,621 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 02:40:09,622 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/fibo_10-2.c [2022-07-22 02:40:09,667 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c8af6f92c/4756ebf6309d498ba050f57ac74afb2f/FLAGda4ff06f8 [2022-07-22 02:40:10,008 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 02:40:10,009 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_10-2.c [2022-07-22 02:40:10,013 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c8af6f92c/4756ebf6309d498ba050f57ac74afb2f/FLAGda4ff06f8 [2022-07-22 02:40:10,462 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c8af6f92c/4756ebf6309d498ba050f57ac74afb2f [2022-07-22 02:40:10,464 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 02:40:10,465 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 02:40:10,468 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 02:40:10,468 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 02:40:10,470 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 02:40:10,471 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 02:40:10" (1/1) ... [2022-07-22 02:40:10,474 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44e8d081 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 02:40:10, skipping insertion in model container [2022-07-22 02:40:10,474 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 02:40:10" (1/1) ... [2022-07-22 02:40:10,479 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 02:40:10,489 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 02:40:10,574 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_10-2.c[743,756] [2022-07-22 02:40:10,575 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 02:40:10,580 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 02:40:10,589 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_10-2.c[743,756] [2022-07-22 02:40:10,589 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 02:40:10,598 INFO L208 MainTranslator]: Completed translation [2022-07-22 02:40:10,598 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 02:40:10 WrapperNode [2022-07-22 02:40:10,598 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 02:40:10,599 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 02:40:10,599 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 02:40:10,599 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 02:40:10,619 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 02:40:10" (1/1) ... [2022-07-22 02:40:10,624 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 02:40:10" (1/1) ... [2022-07-22 02:40:10,645 INFO L137 Inliner]: procedures = 13, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 20 [2022-07-22 02:40:10,645 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 02:40:10,646 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 02:40:10,646 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 02:40:10,646 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 02:40:10,651 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 02:40:10" (1/1) ... [2022-07-22 02:40:10,651 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 02:40:10" (1/1) ... [2022-07-22 02:40:10,652 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 02:40:10" (1/1) ... [2022-07-22 02:40:10,652 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 02:40:10" (1/1) ... [2022-07-22 02:40:10,654 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 02:40:10" (1/1) ... [2022-07-22 02:40:10,655 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 02:40:10" (1/1) ... [2022-07-22 02:40:10,656 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 02:40:10" (1/1) ... [2022-07-22 02:40:10,657 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 02:40:10,657 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 02:40:10,657 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 02:40:10,657 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 02:40:10,658 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 02:40:10" (1/1) ... [2022-07-22 02:40:10,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 02:40:10,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 02:40:10,696 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 02:40:10,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2022-07-22 02:40:10,738 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 02:40:10,738 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 02:40:10,738 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 02:40:10,738 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 02:40:10,739 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2022-07-22 02:40:10,739 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2022-07-22 02:40:10,791 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 02:40:10,792 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 02:40:10,878 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 02:40:10,883 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 02:40:10,884 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-07-22 02:40:10,885 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 02:40:10 BoogieIcfgContainer [2022-07-22 02:40:10,885 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 02:40:10,886 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2022-07-22 02:40:10,886 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2022-07-22 02:40:10,888 INFO L275 PluginConnector]: BuchiAutomizer initialized [2022-07-22 02:40:10,888 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2022-07-22 02:40:10,888 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 22.07 02:40:10" (1/3) ... [2022-07-22 02:40:10,889 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@702c6c4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 22.07 02:40:10, skipping insertion in model container [2022-07-22 02:40:10,890 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2022-07-22 02:40:10,890 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 02:40:10" (2/3) ... [2022-07-22 02:40:10,890 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@702c6c4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 22.07 02:40:10, skipping insertion in model container [2022-07-22 02:40:10,890 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2022-07-22 02:40:10,890 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 02:40:10" (3/3) ... [2022-07-22 02:40:10,892 INFO L354 chiAutomizerObserver]: Analyzing ICFG fibo_10-2.c [2022-07-22 02:40:10,949 INFO L255 stractBuchiCegarLoop]: Interprodecural is true [2022-07-22 02:40:10,949 INFO L256 stractBuchiCegarLoop]: Hoare is false [2022-07-22 02:40:10,949 INFO L257 stractBuchiCegarLoop]: Compute interpolants for ForwardPredicates [2022-07-22 02:40:10,950 INFO L258 stractBuchiCegarLoop]: Backedges is STRAIGHT_LINE [2022-07-22 02:40:10,950 INFO L259 stractBuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2022-07-22 02:40:10,950 INFO L260 stractBuchiCegarLoop]: Difference is false [2022-07-22 02:40:10,950 INFO L261 stractBuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2022-07-22 02:40:10,950 INFO L265 stractBuchiCegarLoop]: ======== Iteration 0 == of CEGAR loop == BuchiAutomatonCegarLoop ======== [2022-07-22 02:40:10,957 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-22 02:40:10,970 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2022-07-22 02:40:10,970 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-07-22 02:40:10,970 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-07-22 02:40:10,991 INFO L179 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1] [2022-07-22 02:40:10,991 INFO L180 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2022-07-22 02:40:10,992 INFO L287 stractBuchiCegarLoop]: ======== Iteration 1 ============ [2022-07-22 02:40:10,992 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-22 02:40:10,994 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2022-07-22 02:40:10,994 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-07-22 02:40:10,994 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-07-22 02:40:10,994 INFO L179 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1] [2022-07-22 02:40:10,994 INFO L180 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2022-07-22 02:40:11,000 INFO L752 eck$LassoCheckResult]: Stem: 3#ULTIMATE.startENTRYtrue assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(12, 2);call #Ultimate.allocInit(12, 3); 12#L-1true assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~ret6#1, main_~x~0#1, main_~result~0#1;main_~x~0#1 := 10; 5#L27true call main_#t~ret6#1 := fibo(main_~x~0#1);< 6#fiboENTRYtrue [2022-07-22 02:40:11,000 INFO L754 eck$LassoCheckResult]: Loop: 6#fiboENTRYtrue ~n := #in~n; 7#L8true assume !(~n < 1); 9#L10true assume !(1 == ~n); 14#L13true call #t~ret4 := fibo(~n - 1);< 6#fiboENTRYtrue [2022-07-22 02:40:11,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 02:40:11,005 INFO L85 PathProgramCache]: Analyzing trace with hash 29883, now seen corresponding path program 1 times [2022-07-22 02:40:11,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 02:40:11,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061778219] [2022-07-22 02:40:11,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 02:40:11,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 02:40:11,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 02:40:11,089 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 02:40:11,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 02:40:11,119 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 02:40:11,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 02:40:11,123 INFO L85 PathProgramCache]: Analyzing trace with hash 1450956, now seen corresponding path program 1 times [2022-07-22 02:40:11,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 02:40:11,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817849744] [2022-07-22 02:40:11,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 02:40:11,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 02:40:11,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 02:40:11,133 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 02:40:11,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 02:40:11,138 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 02:40:11,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 02:40:11,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1828301702, now seen corresponding path program 1 times [2022-07-22 02:40:11,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 02:40:11,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842410610] [2022-07-22 02:40:11,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 02:40:11,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 02:40:11,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 02:40:11,163 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 02:40:11,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 02:40:11,176 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 02:40:11,277 INFO L210 LassoAnalysis]: Preferences: [2022-07-22 02:40:11,278 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-07-22 02:40:11,278 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-07-22 02:40:11,278 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-07-22 02:40:11,279 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2022-07-22 02:40:11,279 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 02:40:11,279 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-07-22 02:40:11,279 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-07-22 02:40:11,279 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-2.c_Iteration1_Loop [2022-07-22 02:40:11,280 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-07-22 02:40:11,280 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-07-22 02:40:11,290 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 02:40:11,296 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 02:40:11,299 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 02:40:11,303 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 02:40:11,311 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 02:40:11,359 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-07-22 02:40:11,361 INFO L404 LassoAnalysis]: Checking for nontermination... [2022-07-22 02:40:11,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 02:40:11,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 02:40:11,366 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 02:40:11,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Waiting until timeout for monitored process [2022-07-22 02:40:11,371 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-22 02:40:11,372 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-22 02:40:11,393 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-07-22 02:40:11,394 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret5=0} Honda state: {fibo_#t~ret5=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-07-22 02:40:11,423 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Ended with exit code 0 [2022-07-22 02:40:11,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 02:40:11,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 02:40:11,427 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 02:40:11,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Waiting until timeout for monitored process [2022-07-22 02:40:11,430 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-22 02:40:11,430 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-22 02:40:11,454 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-07-22 02:40:11,454 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-07-22 02:40:11,479 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Forceful destruction successful, exit code 0 [2022-07-22 02:40:11,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 02:40:11,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 02:40:11,482 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 02:40:11,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Waiting until timeout for monitored process [2022-07-22 02:40:11,484 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-22 02:40:11,485 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-22 02:40:11,506 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-07-22 02:40:11,506 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_~n=0} Honda state: {fibo_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-07-22 02:40:11,526 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Forceful destruction successful, exit code 0 [2022-07-22 02:40:11,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 02:40:11,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 02:40:11,528 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 02:40:11,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Waiting until timeout for monitored process [2022-07-22 02:40:11,530 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-22 02:40:11,531 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-22 02:40:11,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Forceful destruction successful, exit code 0 [2022-07-22 02:40:11,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 02:40:11,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 02:40:11,580 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 02:40:11,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Waiting until timeout for monitored process [2022-07-22 02:40:11,599 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2022-07-22 02:40:11,599 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-22 02:40:11,660 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2022-07-22 02:40:11,663 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Forceful destruction successful, exit code 0 [2022-07-22 02:40:11,664 INFO L210 LassoAnalysis]: Preferences: [2022-07-22 02:40:11,664 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-07-22 02:40:11,664 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-07-22 02:40:11,664 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-07-22 02:40:11,664 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2022-07-22 02:40:11,664 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 02:40:11,664 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-07-22 02:40:11,664 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-07-22 02:40:11,664 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-2.c_Iteration1_Loop [2022-07-22 02:40:11,664 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-07-22 02:40:11,664 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-07-22 02:40:11,665 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 02:40:11,668 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 02:40:11,671 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 02:40:11,676 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 02:40:11,686 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 02:40:11,717 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-07-22 02:40:11,720 INFO L490 LassoAnalysis]: Using template 'affine'. [2022-07-22 02:40:11,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 02:40:11,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 02:40:11,723 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 02:40:11,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Waiting until timeout for monitored process [2022-07-22 02:40:11,726 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2022-07-22 02:40:11,732 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-22 02:40:11,733 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-22 02:40:11,733 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-22 02:40:11,733 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-22 02:40:11,733 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-22 02:40:11,735 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-22 02:40:11,735 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-22 02:40:11,751 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-07-22 02:40:11,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Forceful destruction successful, exit code 0 [2022-07-22 02:40:11,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 02:40:11,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 02:40:11,769 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 02:40:11,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Waiting until timeout for monitored process [2022-07-22 02:40:11,772 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2022-07-22 02:40:11,778 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-22 02:40:11,778 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-22 02:40:11,778 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-22 02:40:11,778 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-22 02:40:11,778 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-22 02:40:11,779 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-22 02:40:11,779 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-22 02:40:11,794 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-07-22 02:40:11,812 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Ended with exit code 0 [2022-07-22 02:40:11,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 02:40:11,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 02:40:11,814 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 02:40:11,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Waiting until timeout for monitored process [2022-07-22 02:40:11,817 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2022-07-22 02:40:11,823 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-22 02:40:11,823 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-22 02:40:11,824 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-22 02:40:11,824 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-22 02:40:11,824 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-22 02:40:11,825 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-22 02:40:11,825 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-22 02:40:11,826 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-07-22 02:40:11,843 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Forceful destruction successful, exit code 0 [2022-07-22 02:40:11,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 02:40:11,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 02:40:11,846 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 02:40:11,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Waiting until timeout for monitored process [2022-07-22 02:40:11,848 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2022-07-22 02:40:11,854 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-22 02:40:11,854 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-22 02:40:11,855 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-22 02:40:11,855 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-22 02:40:11,855 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-22 02:40:11,856 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-22 02:40:11,856 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-22 02:40:11,871 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2022-07-22 02:40:11,874 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2022-07-22 02:40:11,874 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2022-07-22 02:40:11,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 02:40:11,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 02:40:11,898 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 02:40:11,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Waiting until timeout for monitored process [2022-07-22 02:40:11,900 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2022-07-22 02:40:11,901 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2022-07-22 02:40:11,901 INFO L513 LassoAnalysis]: Proved termination. [2022-07-22 02:40:11,901 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_#in~n) = 1*fibo_#in~n Supporting invariants [] [2022-07-22 02:40:11,928 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 [2022-07-22 02:40:11,930 INFO L293 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2022-07-22 02:40:11,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 02:40:11,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 02:40:11,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 02:40:11,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 02:40:12,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 02:40:12,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-22 02:40:12,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 02:40:12,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 02:40:12,069 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2022-07-22 02:40:12,070 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 02:40:12,156 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3). Second operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 48 states and 60 transitions. Complement of second has 12 states. [2022-07-22 02:40:12,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2022-07-22 02:40:12,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 02:40:12,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 11 transitions. [2022-07-22 02:40:12,170 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 3 letters. Loop has 4 letters. [2022-07-22 02:40:12,171 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-22 02:40:12,171 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 7 letters. Loop has 4 letters. [2022-07-22 02:40:12,171 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-22 02:40:12,171 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 3 letters. Loop has 8 letters. [2022-07-22 02:40:12,172 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-22 02:40:12,172 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 48 states and 60 transitions. [2022-07-22 02:40:12,179 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2022-07-22 02:40:12,185 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 48 states to 25 states and 34 transitions. [2022-07-22 02:40:12,186 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 17 [2022-07-22 02:40:12,186 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 18 [2022-07-22 02:40:12,187 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 34 transitions. [2022-07-22 02:40:12,187 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-07-22 02:40:12,187 INFO L369 hiAutomatonCegarLoop]: Abstraction has 25 states and 34 transitions. [2022-07-22 02:40:12,202 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Forceful destruction successful, exit code 0 [2022-07-22 02:40:12,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states and 34 transitions. [2022-07-22 02:40:12,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 20. [2022-07-22 02:40:12,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-22 02:40:12,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 26 transitions. [2022-07-22 02:40:12,229 INFO L392 hiAutomatonCegarLoop]: Abstraction has 20 states and 26 transitions. [2022-07-22 02:40:12,229 INFO L374 stractBuchiCegarLoop]: Abstraction has 20 states and 26 transitions. [2022-07-22 02:40:12,229 INFO L287 stractBuchiCegarLoop]: ======== Iteration 2 ============ [2022-07-22 02:40:12,229 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 20 states and 26 transitions. [2022-07-22 02:40:12,230 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2022-07-22 02:40:12,230 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-07-22 02:40:12,230 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-07-22 02:40:12,231 INFO L179 hiAutomatonCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 02:40:12,231 INFO L180 hiAutomatonCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 02:40:12,231 INFO L752 eck$LassoCheckResult]: Stem: 122#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(12, 2);call #Ultimate.allocInit(12, 3); 123#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~ret6#1, main_~x~0#1, main_~result~0#1;main_~x~0#1 := 10; 128#L27 call main_#t~ret6#1 := fibo(main_~x~0#1);< 132#fiboENTRY ~n := #in~n; 133#L8 assume !(~n < 1); 138#L10 assume !(1 == ~n); 127#L13 call #t~ret4 := fibo(~n - 1);< 129#fiboENTRY ~n := #in~n; 134#L8 assume ~n < 1;#res := 0; 135#fiboFINAL assume true; 136#fiboEXIT >#33#return; 125#L13-1 [2022-07-22 02:40:12,232 INFO L754 eck$LassoCheckResult]: Loop: 125#L13-1 call #t~ret5 := fibo(~n - 2);< 126#fiboENTRY ~n := #in~n; 141#L8 assume !(~n < 1); 140#L10 assume !(1 == ~n); 124#L13 call #t~ret4 := fibo(~n - 1);< 126#fiboENTRY ~n := #in~n; 141#L8 assume ~n < 1;#res := 0; 131#fiboFINAL assume true; 139#fiboEXIT >#33#return; 125#L13-1 [2022-07-22 02:40:12,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 02:40:12,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1181449843, now seen corresponding path program 1 times [2022-07-22 02:40:12,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 02:40:12,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395916752] [2022-07-22 02:40:12,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 02:40:12,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 02:40:12,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 02:40:12,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-22 02:40:12,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 02:40:12,331 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 02:40:12,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 02:40:12,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395916752] [2022-07-22 02:40:12,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395916752] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 02:40:12,333 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 02:40:12,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 02:40:12,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221859884] [2022-07-22 02:40:12,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 02:40:12,338 INFO L757 eck$LassoCheckResult]: stem already infeasible [2022-07-22 02:40:12,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 02:40:12,339 INFO L85 PathProgramCache]: Analyzing trace with hash 246097683, now seen corresponding path program 1 times [2022-07-22 02:40:12,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 02:40:12,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077007979] [2022-07-22 02:40:12,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 02:40:12,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 02:40:12,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 02:40:12,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 02:40:12,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 02:40:12,389 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 02:40:12,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 02:40:12,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077007979] [2022-07-22 02:40:12,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077007979] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 02:40:12,389 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 02:40:12,390 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 02:40:12,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934940805] [2022-07-22 02:40:12,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 02:40:12,390 INFO L769 eck$LassoCheckResult]: loop already infeasible [2022-07-22 02:40:12,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 02:40:12,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 02:40:12,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-22 02:40:12,393 INFO L87 Difference]: Start difference. First operand 20 states and 26 transitions. cyclomatic complexity: 8 Second operand has 6 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-22 02:40:12,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 02:40:12,459 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2022-07-22 02:40:12,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 02:40:12,460 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 26 states and 32 transitions. [2022-07-22 02:40:12,464 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2022-07-22 02:40:12,468 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 26 states to 24 states and 30 transitions. [2022-07-22 02:40:12,468 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 20 [2022-07-22 02:40:12,469 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 20 [2022-07-22 02:40:12,469 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 30 transitions. [2022-07-22 02:40:12,469 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-07-22 02:40:12,469 INFO L369 hiAutomatonCegarLoop]: Abstraction has 24 states and 30 transitions. [2022-07-22 02:40:12,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states and 30 transitions. [2022-07-22 02:40:12,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-07-22 02:40:12,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 16 states have (on average 1.1875) internal successors, (19), 18 states have internal predecessors, (19), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-07-22 02:40:12,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2022-07-22 02:40:12,473 INFO L392 hiAutomatonCegarLoop]: Abstraction has 24 states and 30 transitions. [2022-07-22 02:40:12,473 INFO L374 stractBuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2022-07-22 02:40:12,473 INFO L287 stractBuchiCegarLoop]: ======== Iteration 3 ============ [2022-07-22 02:40:12,473 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 24 states and 30 transitions. [2022-07-22 02:40:12,474 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2022-07-22 02:40:12,474 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-07-22 02:40:12,474 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-07-22 02:40:12,474 INFO L179 hiAutomatonCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 02:40:12,474 INFO L180 hiAutomatonCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1] [2022-07-22 02:40:12,475 INFO L752 eck$LassoCheckResult]: Stem: 195#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(12, 2);call #Ultimate.allocInit(12, 3); 196#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~ret6#1, main_~x~0#1, main_~result~0#1;main_~x~0#1 := 10; 201#L27 call main_#t~ret6#1 := fibo(main_~x~0#1);< 205#fiboENTRY ~n := #in~n; 207#L8 assume !(~n < 1); 211#L10 assume !(1 == ~n); 200#L13 call #t~ret4 := fibo(~n - 1);< 202#fiboENTRY ~n := #in~n; 208#L8 assume !(~n < 1); 210#L10 assume 1 == ~n;#res := 1; 212#fiboFINAL assume true; 214#fiboEXIT >#33#return; 198#L13-1 [2022-07-22 02:40:12,475 INFO L754 eck$LassoCheckResult]: Loop: 198#L13-1 call #t~ret5 := fibo(~n - 2);< 199#fiboENTRY ~n := #in~n; 217#L8 assume !(~n < 1); 215#L10 assume !(1 == ~n); 197#L13 call #t~ret4 := fibo(~n - 1);< 199#fiboENTRY ~n := #in~n; 217#L8 assume !(~n < 1); 215#L10 assume 1 == ~n;#res := 1; 216#fiboFINAL assume true; 213#fiboEXIT >#33#return; 198#L13-1 [2022-07-22 02:40:12,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 02:40:12,475 INFO L85 PathProgramCache]: Analyzing trace with hash 2029785426, now seen corresponding path program 1 times [2022-07-22 02:40:12,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 02:40:12,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289577218] [2022-07-22 02:40:12,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 02:40:12,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 02:40:12,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 02:40:12,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-07-22 02:40:12,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 02:40:12,513 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 02:40:12,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 02:40:12,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289577218] [2022-07-22 02:40:12,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289577218] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 02:40:12,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440495935] [2022-07-22 02:40:12,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 02:40:12,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 02:40:12,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 02:40:12,532 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 02:40:12,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-22 02:40:12,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 02:40:12,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-22 02:40:12,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 02:40:12,592 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 02:40:12,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 02:40:12,698 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 02:40:12,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440495935] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 02:40:12,698 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 02:40:12,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2022-07-22 02:40:12,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760731695] [2022-07-22 02:40:12,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 02:40:12,699 INFO L757 eck$LassoCheckResult]: stem already infeasible [2022-07-22 02:40:12,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 02:40:12,700 INFO L85 PathProgramCache]: Analyzing trace with hash -960881524, now seen corresponding path program 1 times [2022-07-22 02:40:12,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 02:40:12,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027778336] [2022-07-22 02:40:12,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 02:40:12,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 02:40:12,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 02:40:12,711 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 02:40:12,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 02:40:12,716 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 02:40:12,824 INFO L210 LassoAnalysis]: Preferences: [2022-07-22 02:40:12,824 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-07-22 02:40:12,824 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-07-22 02:40:12,824 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-07-22 02:40:12,824 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2022-07-22 02:40:12,824 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 02:40:12,825 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-07-22 02:40:12,825 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-07-22 02:40:12,825 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-2.c_Iteration3_Loop [2022-07-22 02:40:12,825 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-07-22 02:40:12,825 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-07-22 02:40:12,826 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 02:40:12,828 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 02:40:12,830 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 02:40:12,835 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 02:40:12,866 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-07-22 02:40:12,866 INFO L404 LassoAnalysis]: Checking for nontermination... [2022-07-22 02:40:12,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 02:40:12,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 02:40:12,880 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 02:40:12,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Waiting until timeout for monitored process [2022-07-22 02:40:12,883 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-22 02:40:12,883 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-22 02:40:12,902 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-07-22 02:40:12,902 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-07-22 02:40:12,921 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Forceful destruction successful, exit code 0 [2022-07-22 02:40:12,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 02:40:12,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 02:40:12,922 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 02:40:12,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Waiting until timeout for monitored process [2022-07-22 02:40:12,925 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-22 02:40:12,925 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-22 02:40:12,955 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-07-22 02:40:12,956 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret4=1} Honda state: {fibo_#t~ret4=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-07-22 02:40:12,974 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Forceful destruction successful, exit code 0 [2022-07-22 02:40:12,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 02:40:12,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 02:40:12,976 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 02:40:12,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Waiting until timeout for monitored process [2022-07-22 02:40:12,985 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-22 02:40:12,985 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-22 02:40:13,031 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Forceful destruction successful, exit code 0 [2022-07-22 02:40:13,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 02:40:13,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 02:40:13,033 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 02:40:13,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Waiting until timeout for monitored process [2022-07-22 02:40:13,035 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2022-07-22 02:40:13,035 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-22 02:40:13,875 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2022-07-22 02:40:13,881 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Forceful destruction successful, exit code 0 [2022-07-22 02:40:13,881 INFO L210 LassoAnalysis]: Preferences: [2022-07-22 02:40:13,881 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-07-22 02:40:13,881 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-07-22 02:40:13,881 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-07-22 02:40:13,881 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2022-07-22 02:40:13,881 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 02:40:13,881 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-07-22 02:40:13,881 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-07-22 02:40:13,881 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-2.c_Iteration3_Loop [2022-07-22 02:40:13,881 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-07-22 02:40:13,881 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-07-22 02:40:13,882 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 02:40:13,893 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 02:40:13,894 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 02:40:13,900 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 02:40:13,951 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-07-22 02:40:13,951 INFO L490 LassoAnalysis]: Using template 'affine'. [2022-07-22 02:40:13,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 02:40:13,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 02:40:13,964 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 02:40:13,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Waiting until timeout for monitored process [2022-07-22 02:40:13,981 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2022-07-22 02:40:13,987 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-22 02:40:13,987 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-22 02:40:13,987 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-22 02:40:13,987 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-22 02:40:13,987 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-22 02:40:13,988 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-22 02:40:13,988 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-22 02:40:14,003 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-07-22 02:40:14,020 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Forceful destruction successful, exit code 0 [2022-07-22 02:40:14,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 02:40:14,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 02:40:14,021 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 02:40:14,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Waiting until timeout for monitored process [2022-07-22 02:40:14,064 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2022-07-22 02:40:14,071 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-22 02:40:14,071 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-22 02:40:14,071 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-22 02:40:14,071 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-22 02:40:14,071 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-22 02:40:14,072 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-22 02:40:14,072 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-22 02:40:14,073 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-07-22 02:40:14,091 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 [2022-07-22 02:40:14,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 02:40:14,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 02:40:14,092 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 02:40:14,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Waiting until timeout for monitored process [2022-07-22 02:40:14,095 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2022-07-22 02:40:14,101 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-22 02:40:14,101 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-22 02:40:14,102 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-22 02:40:14,102 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-22 02:40:14,102 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-22 02:40:14,104 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-22 02:40:14,104 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-22 02:40:14,106 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2022-07-22 02:40:14,125 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2022-07-22 02:40:14,125 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2022-07-22 02:40:14,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 02:40:14,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 02:40:14,127 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 02:40:14,129 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2022-07-22 02:40:14,129 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2022-07-22 02:40:14,130 INFO L513 LassoAnalysis]: Proved termination. [2022-07-22 02:40:14,130 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2022-07-22 02:40:14,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Waiting until timeout for monitored process [2022-07-22 02:40:14,148 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Forceful destruction successful, exit code 0 [2022-07-22 02:40:14,148 INFO L293 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2022-07-22 02:40:14,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 02:40:14,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 02:40:14,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-22 02:40:14,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 02:40:14,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 02:40:14,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-22 02:40:14,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 02:40:14,280 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Forceful destruction successful, exit code 0 [2022-07-22 02:40:14,342 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 02:40:14,342 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 6 loop predicates [2022-07-22 02:40:14,343 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 24 states and 30 transitions. cyclomatic complexity: 8 Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 02:40:14,496 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 24 states and 30 transitions. cyclomatic complexity: 8. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Result 135 states and 183 transitions. Complement of second has 36 states. [2022-07-22 02:40:14,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 9 states 2 stem states 6 non-accepting loop states 1 accepting loop states [2022-07-22 02:40:14,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 02:40:14,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 37 transitions. [2022-07-22 02:40:14,498 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 37 transitions. Stem has 12 letters. Loop has 10 letters. [2022-07-22 02:40:14,498 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-22 02:40:14,498 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 37 transitions. Stem has 22 letters. Loop has 10 letters. [2022-07-22 02:40:14,499 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-22 02:40:14,499 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 37 transitions. Stem has 12 letters. Loop has 20 letters. [2022-07-22 02:40:14,499 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-22 02:40:14,499 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 135 states and 183 transitions. [2022-07-22 02:40:14,503 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2022-07-22 02:40:14,505 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 135 states to 108 states and 152 transitions. [2022-07-22 02:40:14,505 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 64 [2022-07-22 02:40:14,506 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 69 [2022-07-22 02:40:14,506 INFO L73 IsDeterministic]: Start isDeterministic. Operand 108 states and 152 transitions. [2022-07-22 02:40:14,506 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-07-22 02:40:14,506 INFO L369 hiAutomatonCegarLoop]: Abstraction has 108 states and 152 transitions. [2022-07-22 02:40:14,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states and 152 transitions. [2022-07-22 02:40:14,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 94. [2022-07-22 02:40:14,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 58 states have (on average 1.2241379310344827) internal successors, (71), 64 states have internal predecessors, (71), 21 states have call successors, (22), 11 states have call predecessors, (22), 15 states have return successors, (33), 18 states have call predecessors, (33), 19 states have call successors, (33) [2022-07-22 02:40:14,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 126 transitions. [2022-07-22 02:40:14,514 INFO L392 hiAutomatonCegarLoop]: Abstraction has 94 states and 126 transitions. [2022-07-22 02:40:14,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 02:40:14,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-22 02:40:14,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-07-22 02:40:14,515 INFO L87 Difference]: Start difference. First operand 94 states and 126 transitions. Second operand has 12 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 02:40:14,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 02:40:14,604 INFO L93 Difference]: Finished difference Result 123 states and 165 transitions. [2022-07-22 02:40:14,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-22 02:40:14,605 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 123 states and 165 transitions. [2022-07-22 02:40:14,607 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2022-07-22 02:40:14,609 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 123 states to 118 states and 160 transitions. [2022-07-22 02:40:14,609 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 77 [2022-07-22 02:40:14,609 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 77 [2022-07-22 02:40:14,609 INFO L73 IsDeterministic]: Start isDeterministic. Operand 118 states and 160 transitions. [2022-07-22 02:40:14,609 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-07-22 02:40:14,610 INFO L369 hiAutomatonCegarLoop]: Abstraction has 118 states and 160 transitions. [2022-07-22 02:40:14,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states and 160 transitions. [2022-07-22 02:40:14,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 106. [2022-07-22 02:40:14,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 66 states have (on average 1.196969696969697) internal successors, (79), 72 states have internal predecessors, (79), 24 states have call successors, (25), 13 states have call predecessors, (25), 16 states have return successors, (37), 20 states have call predecessors, (37), 22 states have call successors, (37) [2022-07-22 02:40:14,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 141 transitions. [2022-07-22 02:40:14,617 INFO L392 hiAutomatonCegarLoop]: Abstraction has 106 states and 141 transitions. [2022-07-22 02:40:14,617 INFO L374 stractBuchiCegarLoop]: Abstraction has 106 states and 141 transitions. [2022-07-22 02:40:14,617 INFO L287 stractBuchiCegarLoop]: ======== Iteration 4 ============ [2022-07-22 02:40:14,617 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 106 states and 141 transitions. [2022-07-22 02:40:14,618 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2022-07-22 02:40:14,618 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-07-22 02:40:14,619 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-07-22 02:40:14,620 INFO L179 hiAutomatonCegarLoop]: Counterexample stem histogram [6, 5, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 02:40:14,620 INFO L180 hiAutomatonCegarLoop]: Counterexample loop histogram [6, 5, 5, 3, 3, 3, 3, 2, 2, 2, 1] [2022-07-22 02:40:14,620 INFO L752 eck$LassoCheckResult]: Stem: 789#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(12, 2);call #Ultimate.allocInit(12, 3); 790#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~ret6#1, main_~x~0#1, main_~result~0#1;main_~x~0#1 := 10; 804#L27 call main_#t~ret6#1 := fibo(main_~x~0#1);< 806#fiboENTRY ~n := #in~n; 854#L8 assume !(~n < 1); 853#L10 assume !(1 == ~n); 803#L13 call #t~ret4 := fibo(~n - 1);< 805#fiboENTRY ~n := #in~n; 815#L8 assume !(~n < 1); 820#L10 assume !(1 == ~n); 826#L13 call #t~ret4 := fibo(~n - 1);< 847#fiboENTRY ~n := #in~n; 851#L8 assume !(~n < 1); 849#L10 assume !(1 == ~n); 843#L13 call #t~ret4 := fibo(~n - 1);< 847#fiboENTRY ~n := #in~n; 851#L8 assume !(~n < 1); 849#L10 assume !(1 == ~n); 843#L13 call #t~ret4 := fibo(~n - 1);< 847#fiboENTRY ~n := #in~n; 852#L8 assume !(~n < 1); 850#L10 assume 1 == ~n;#res := 1; 848#fiboFINAL assume true; 846#fiboEXIT >#33#return; 792#L13-1 call #t~ret5 := fibo(~n - 2);< 844#fiboENTRY ~n := #in~n; 892#L8 assume ~n < 1;#res := 0; 891#fiboFINAL assume true; 890#fiboEXIT >#35#return; 889#L13-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 887#fiboFINAL assume true; 879#fiboEXIT >#33#return; 824#L13-1 [2022-07-22 02:40:14,620 INFO L754 eck$LassoCheckResult]: Loop: 824#L13-1 call #t~ret5 := fibo(~n - 2);< 802#fiboENTRY ~n := #in~n; 884#L8 assume !(~n < 1); 821#L10 assume !(1 == ~n); 822#L13 call #t~ret4 := fibo(~n - 1);< 802#fiboENTRY ~n := #in~n; 884#L8 assume !(~n < 1); 821#L10 assume !(1 == ~n); 822#L13 call #t~ret4 := fibo(~n - 1);< 802#fiboENTRY ~n := #in~n; 884#L8 assume !(~n < 1); 821#L10 assume 1 == ~n;#res := 1; 825#fiboFINAL assume true; 876#fiboEXIT >#33#return; 824#L13-1 call #t~ret5 := fibo(~n - 2);< 802#fiboENTRY ~n := #in~n; 884#L8 assume !(~n < 1); 821#L10 assume !(1 == ~n); 822#L13 call #t~ret4 := fibo(~n - 1);< 802#fiboENTRY ~n := #in~n; 884#L8 assume !(~n < 1); 821#L10 assume 1 == ~n;#res := 1; 825#fiboFINAL assume true; 876#fiboEXIT >#33#return; 824#L13-1 call #t~ret5 := fibo(~n - 2);< 802#fiboENTRY ~n := #in~n; 884#L8 assume ~n < 1;#res := 0; 885#fiboFINAL assume true; 883#fiboEXIT >#35#return; 878#L13-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 886#fiboFINAL assume true; 880#fiboEXIT >#35#return; 878#L13-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 886#fiboFINAL assume true; 880#fiboEXIT >#33#return; 824#L13-1 [2022-07-22 02:40:14,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 02:40:14,621 INFO L85 PathProgramCache]: Analyzing trace with hash -1730264506, now seen corresponding path program 1 times [2022-07-22 02:40:14,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 02:40:14,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481537580] [2022-07-22 02:40:14,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 02:40:14,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 02:40:14,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 02:40:14,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-22 02:40:14,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 02:40:14,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 02:40:14,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 02:40:14,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 02:40:14,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 02:40:14,723 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 45 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 02:40:14,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 02:40:14,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481537580] [2022-07-22 02:40:14,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481537580] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 02:40:14,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284798197] [2022-07-22 02:40:14,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 02:40:14,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 02:40:14,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 02:40:14,726 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 02:40:14,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-22 02:40:14,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 02:40:14,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-22 02:40:14,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 02:40:14,799 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 45 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 02:40:14,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 02:40:14,980 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 47 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-22 02:40:14,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284798197] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 02:40:14,981 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 02:40:14,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 12] total 22 [2022-07-22 02:40:14,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929724524] [2022-07-22 02:40:14,981 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 02:40:14,982 INFO L757 eck$LassoCheckResult]: stem already infeasible [2022-07-22 02:40:14,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 02:40:14,982 INFO L85 PathProgramCache]: Analyzing trace with hash 1616897917, now seen corresponding path program 1 times [2022-07-22 02:40:14,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 02:40:14,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246616004] [2022-07-22 02:40:14,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 02:40:14,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 02:40:14,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 02:40:14,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 02:40:15,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 02:40:15,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 02:40:15,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 02:40:15,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 02:40:15,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 02:40:15,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 02:40:15,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 02:40:15,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 02:40:15,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 02:40:15,059 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 26 proven. 13 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-22 02:40:15,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 02:40:15,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246616004] [2022-07-22 02:40:15,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246616004] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 02:40:15,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593742901] [2022-07-22 02:40:15,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 02:40:15,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 02:40:15,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 02:40:15,071 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 02:40:15,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-22 02:40:15,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 02:40:15,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-22 02:40:15,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 02:40:15,149 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 25 proven. 15 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-22 02:40:15,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 02:40:15,262 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 25 proven. 15 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-22 02:40:15,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593742901] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 02:40:15,263 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 02:40:15,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-07-22 02:40:15,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692008972] [2022-07-22 02:40:15,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 02:40:15,264 INFO L769 eck$LassoCheckResult]: loop already infeasible [2022-07-22 02:40:15,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 02:40:15,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-22 02:40:15,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2022-07-22 02:40:15,265 INFO L87 Difference]: Start difference. First operand 106 states and 141 transitions. cyclomatic complexity: 40 Second operand has 23 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 15 states have internal predecessors, (41), 13 states have call successors, (13), 7 states have call predecessors, (13), 3 states have return successors, (7), 3 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-22 02:40:15,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 02:40:15,546 INFO L93 Difference]: Finished difference Result 174 states and 225 transitions. [2022-07-22 02:40:15,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-22 02:40:15,547 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 174 states and 225 transitions. [2022-07-22 02:40:15,549 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 15 [2022-07-22 02:40:15,552 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 174 states to 163 states and 214 transitions. [2022-07-22 02:40:15,552 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 110 [2022-07-22 02:40:15,552 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 110 [2022-07-22 02:40:15,552 INFO L73 IsDeterministic]: Start isDeterministic. Operand 163 states and 214 transitions. [2022-07-22 02:40:15,553 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-07-22 02:40:15,553 INFO L369 hiAutomatonCegarLoop]: Abstraction has 163 states and 214 transitions. [2022-07-22 02:40:15,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states and 214 transitions. [2022-07-22 02:40:15,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2022-07-22 02:40:15,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 102 states have (on average 1.1470588235294117) internal successors, (117), 108 states have internal predecessors, (117), 39 states have call successors, (40), 21 states have call predecessors, (40), 22 states have return successors, (57), 33 states have call predecessors, (57), 36 states have call successors, (57) [2022-07-22 02:40:15,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 214 transitions. [2022-07-22 02:40:15,567 INFO L392 hiAutomatonCegarLoop]: Abstraction has 163 states and 214 transitions. [2022-07-22 02:40:15,567 INFO L374 stractBuchiCegarLoop]: Abstraction has 163 states and 214 transitions. [2022-07-22 02:40:15,567 INFO L287 stractBuchiCegarLoop]: ======== Iteration 5 ============ [2022-07-22 02:40:15,567 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 163 states and 214 transitions. [2022-07-22 02:40:15,569 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 15 [2022-07-22 02:40:15,569 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-07-22 02:40:15,569 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-07-22 02:40:15,570 INFO L179 hiAutomatonCegarLoop]: Counterexample stem histogram [10, 9, 8, 8, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 02:40:15,570 INFO L180 hiAutomatonCegarLoop]: Counterexample loop histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2022-07-22 02:40:15,570 INFO L752 eck$LassoCheckResult]: Stem: 1602#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(12, 2);call #Ultimate.allocInit(12, 3); 1603#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~ret6#1, main_~x~0#1, main_~result~0#1;main_~x~0#1 := 10; 1611#L27 call main_#t~ret6#1 := fibo(main_~x~0#1);< 1618#fiboENTRY ~n := #in~n; 1630#L8 assume !(~n < 1); 1631#L10 assume !(1 == ~n); 1610#L13 call #t~ret4 := fibo(~n - 1);< 1612#fiboENTRY ~n := #in~n; 1625#L8 assume !(~n < 1); 1683#L10 assume !(1 == ~n); 1679#L13 call #t~ret4 := fibo(~n - 1);< 1682#fiboENTRY ~n := #in~n; 1681#L8 assume !(~n < 1); 1680#L10 assume !(1 == ~n); 1675#L13 call #t~ret4 := fibo(~n - 1);< 1678#fiboENTRY ~n := #in~n; 1677#L8 assume !(~n < 1); 1676#L10 assume !(1 == ~n); 1671#L13 call #t~ret4 := fibo(~n - 1);< 1674#fiboENTRY ~n := #in~n; 1673#L8 assume !(~n < 1); 1672#L10 assume !(1 == ~n); 1667#L13 call #t~ret4 := fibo(~n - 1);< 1670#fiboENTRY ~n := #in~n; 1669#L8 assume !(~n < 1); 1668#L10 assume !(1 == ~n); 1654#L13 call #t~ret4 := fibo(~n - 1);< 1660#fiboENTRY ~n := #in~n; 1666#L8 assume !(~n < 1); 1665#L10 assume !(1 == ~n); 1653#L13 call #t~ret4 := fibo(~n - 1);< 1660#fiboENTRY ~n := #in~n; 1666#L8 assume !(~n < 1); 1665#L10 assume !(1 == ~n); 1653#L13 call #t~ret4 := fibo(~n - 1);< 1660#fiboENTRY ~n := #in~n; 1664#L8 assume !(~n < 1); 1663#L10 assume 1 == ~n;#res := 1; 1661#fiboFINAL assume true; 1659#fiboEXIT >#33#return; 1635#L13-1 call #t~ret5 := fibo(~n - 2);< 1655#fiboENTRY ~n := #in~n; 1739#L8 assume ~n < 1;#res := 0; 1737#fiboFINAL assume true; 1736#fiboEXIT >#35#return; 1735#L13-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 1734#fiboFINAL assume true; 1716#fiboEXIT >#33#return; 1709#L13-1 [2022-07-22 02:40:15,571 INFO L754 eck$LassoCheckResult]: Loop: 1709#L13-1 call #t~ret5 := fibo(~n - 2);< 1729#fiboENTRY ~n := #in~n; 1744#L8 assume !(~n < 1); 1742#L10 assume !(1 == ~n); 1706#L13 call #t~ret4 := fibo(~n - 1);< 1729#fiboENTRY ~n := #in~n; 1744#L8 assume !(~n < 1); 1742#L10 assume !(1 == ~n); 1706#L13 call #t~ret4 := fibo(~n - 1);< 1729#fiboENTRY ~n := #in~n; 1744#L8 assume !(~n < 1); 1742#L10 assume 1 == ~n;#res := 1; 1743#fiboFINAL assume true; 1705#fiboEXIT >#33#return; 1713#L13-1 call #t~ret5 := fibo(~n - 2);< 1730#fiboENTRY ~n := #in~n; 1747#L8 assume ~n < 1;#res := 0; 1745#fiboFINAL assume true; 1750#fiboEXIT >#35#return; 1715#L13-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 1738#fiboFINAL assume true; 1717#fiboEXIT >#33#return; 1709#L13-1 [2022-07-22 02:40:15,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 02:40:15,571 INFO L85 PathProgramCache]: Analyzing trace with hash -1960159334, now seen corresponding path program 2 times [2022-07-22 02:40:15,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 02:40:15,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696669183] [2022-07-22 02:40:15,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 02:40:15,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 02:40:15,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 02:40:15,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-07-22 02:40:15,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 02:40:15,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 02:40:15,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 02:40:15,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 02:40:15,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 02:40:15,750 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 2 proven. 153 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 02:40:15,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 02:40:15,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696669183] [2022-07-22 02:40:15,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696669183] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 02:40:15,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154857141] [2022-07-22 02:40:15,750 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 02:40:15,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 02:40:15,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 02:40:15,752 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 02:40:15,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-22 02:40:15,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 02:40:15,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 02:40:15,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-22 02:40:15,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 02:40:15,838 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 2 proven. 153 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 02:40:15,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 02:40:16,009 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 2 proven. 155 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-22 02:40:16,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154857141] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 02:40:16,010 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 02:40:16,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 20] total 23 [2022-07-22 02:40:16,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752066728] [2022-07-22 02:40:16,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 02:40:16,011 INFO L757 eck$LassoCheckResult]: stem already infeasible [2022-07-22 02:40:16,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 02:40:16,011 INFO L85 PathProgramCache]: Analyzing trace with hash 780094678, now seen corresponding path program 2 times [2022-07-22 02:40:16,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 02:40:16,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782985605] [2022-07-22 02:40:16,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 02:40:16,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 02:40:16,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 02:40:16,016 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 02:40:16,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 02:40:16,020 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 02:40:16,211 INFO L210 LassoAnalysis]: Preferences: [2022-07-22 02:40:16,211 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-07-22 02:40:16,211 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-07-22 02:40:16,211 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-07-22 02:40:16,211 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2022-07-22 02:40:16,211 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 02:40:16,211 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-07-22 02:40:16,211 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-07-22 02:40:16,211 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-2.c_Iteration5_Loop [2022-07-22 02:40:16,211 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-07-22 02:40:16,211 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-07-22 02:40:16,212 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 02:40:16,213 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 02:40:16,215 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 02:40:16,218 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 02:40:16,239 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-07-22 02:40:16,240 INFO L404 LassoAnalysis]: Checking for nontermination... [2022-07-22 02:40:16,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 02:40:16,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 02:40:16,257 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 02:40:16,259 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-22 02:40:16,259 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-22 02:40:16,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Waiting until timeout for monitored process [2022-07-22 02:40:16,277 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-07-22 02:40:16,277 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret4=1} Honda state: {fibo_#t~ret4=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-07-22 02:40:16,301 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Forceful destruction successful, exit code 0 [2022-07-22 02:40:16,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 02:40:16,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 02:40:16,304 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 02:40:16,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Waiting until timeout for monitored process [2022-07-22 02:40:16,307 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-22 02:40:16,307 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-22 02:40:16,339 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-07-22 02:40:16,340 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-07-22 02:40:16,359 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Forceful destruction successful, exit code 0 [2022-07-22 02:40:16,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 02:40:16,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 02:40:16,360 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 02:40:16,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Waiting until timeout for monitored process [2022-07-22 02:40:16,363 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-22 02:40:16,363 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-22 02:40:16,438 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 [2022-07-22 02:40:16,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 02:40:16,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 02:40:16,440 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 02:40:16,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Waiting until timeout for monitored process [2022-07-22 02:40:16,442 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2022-07-22 02:40:16,443 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-22 02:40:17,498 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2022-07-22 02:40:17,503 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 [2022-07-22 02:40:17,503 INFO L210 LassoAnalysis]: Preferences: [2022-07-22 02:40:17,503 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-07-22 02:40:17,503 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-07-22 02:40:17,503 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-07-22 02:40:17,503 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2022-07-22 02:40:17,503 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 02:40:17,503 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-07-22 02:40:17,504 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-07-22 02:40:17,504 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-2.c_Iteration5_Loop [2022-07-22 02:40:17,504 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-07-22 02:40:17,504 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-07-22 02:40:17,505 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 02:40:17,507 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 02:40:17,524 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 02:40:17,527 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 02:40:17,569 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-07-22 02:40:17,569 INFO L490 LassoAnalysis]: Using template 'affine'. [2022-07-22 02:40:17,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 02:40:17,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 02:40:17,578 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 02:40:17,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Waiting until timeout for monitored process [2022-07-22 02:40:17,581 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2022-07-22 02:40:17,587 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-22 02:40:17,587 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-22 02:40:17,587 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-22 02:40:17,587 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-22 02:40:17,587 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-22 02:40:17,588 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-22 02:40:17,588 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-22 02:40:17,589 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-07-22 02:40:17,630 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 [2022-07-22 02:40:17,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 02:40:17,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 02:40:17,632 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 02:40:17,648 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 [2022-07-22 02:40:17,654 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-22 02:40:17,654 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-22 02:40:17,654 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-22 02:40:17,654 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-22 02:40:17,654 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-22 02:40:17,655 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-22 02:40:17,655 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-22 02:40:17,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Waiting until timeout for monitored process [2022-07-22 02:40:17,667 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-07-22 02:40:17,697 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Forceful destruction successful, exit code 0 [2022-07-22 02:40:17,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 02:40:17,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 02:40:17,699 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 02:40:17,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Waiting until timeout for monitored process [2022-07-22 02:40:17,702 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2022-07-22 02:40:17,707 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-22 02:40:17,707 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-22 02:40:17,708 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-22 02:40:17,708 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-22 02:40:17,708 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-22 02:40:17,708 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-22 02:40:17,708 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-22 02:40:17,727 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-07-22 02:40:17,757 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 [2022-07-22 02:40:17,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 02:40:17,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 02:40:17,759 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 02:40:17,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (31)] Waiting until timeout for monitored process [2022-07-22 02:40:17,773 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2022-07-22 02:40:17,778 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-22 02:40:17,778 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-22 02:40:17,779 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-22 02:40:17,779 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-22 02:40:17,779 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-22 02:40:17,781 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-22 02:40:17,781 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-22 02:40:17,784 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2022-07-22 02:40:17,786 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2022-07-22 02:40:17,786 INFO L444 ModelExtractionUtils]: 2 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. [2022-07-22 02:40:17,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 02:40:17,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 02:40:17,824 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 02:40:17,826 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2022-07-22 02:40:17,826 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2022-07-22 02:40:17,826 INFO L513 LassoAnalysis]: Proved termination. [2022-07-22 02:40:17,826 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2022-07-22 02:40:17,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (32)] Waiting until timeout for monitored process [2022-07-22 02:40:17,843 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (31)] Ended with exit code 0 [2022-07-22 02:40:17,843 INFO L293 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2022-07-22 02:40:17,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 02:40:17,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 02:40:17,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-22 02:40:17,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 02:40:18,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (32)] Forceful destruction successful, exit code 0 [2022-07-22 02:40:18,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 02:40:18,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-22 02:40:18,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 02:40:18,230 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-22 02:40:18,232 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 7 loop predicates [2022-07-22 02:40:18,233 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 163 states and 214 transitions. cyclomatic complexity: 57 Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-22 02:40:18,416 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 163 states and 214 transitions. cyclomatic complexity: 57. Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Result 296 states and 402 transitions. Complement of second has 45 states. [2022-07-22 02:40:18,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 10 states 2 stem states 7 non-accepting loop states 1 accepting loop states [2022-07-22 02:40:18,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-22 02:40:18,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 41 transitions. [2022-07-22 02:40:18,419 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 41 transitions. Stem has 48 letters. Loop has 22 letters. [2022-07-22 02:40:18,420 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-22 02:40:18,420 INFO L577 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2022-07-22 02:40:18,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 02:40:18,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 02:40:18,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-22 02:40:18,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 02:40:18,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 02:40:18,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-22 02:40:18,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 02:40:18,754 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-22 02:40:18,755 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 7 loop predicates [2022-07-22 02:40:18,755 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 163 states and 214 transitions. cyclomatic complexity: 57 Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-22 02:40:18,864 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 163 states and 214 transitions. cyclomatic complexity: 57. Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Result 357 states and 475 transitions. Complement of second has 25 states. [2022-07-22 02:40:18,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2022-07-22 02:40:18,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-22 02:40:18,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 24 transitions. [2022-07-22 02:40:18,868 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 24 transitions. Stem has 48 letters. Loop has 22 letters. [2022-07-22 02:40:18,868 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-22 02:40:18,868 INFO L577 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2022-07-22 02:40:18,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 02:40:18,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 02:40:18,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-22 02:40:18,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 02:40:19,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 02:40:19,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-22 02:40:19,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 02:40:19,181 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-22 02:40:19,182 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 7 loop predicates [2022-07-22 02:40:19,182 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 163 states and 214 transitions. cyclomatic complexity: 57 Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-22 02:40:19,381 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 163 states and 214 transitions. cyclomatic complexity: 57. Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Result 1282 states and 1787 transitions. Complement of second has 138 states. [2022-07-22 02:40:19,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 10 states 2 stem states 7 non-accepting loop states 1 accepting loop states [2022-07-22 02:40:19,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 6 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-22 02:40:19,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 46 transitions. [2022-07-22 02:40:19,384 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 46 transitions. Stem has 48 letters. Loop has 22 letters. [2022-07-22 02:40:19,388 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-22 02:40:19,388 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 46 transitions. Stem has 70 letters. Loop has 22 letters. [2022-07-22 02:40:19,389 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-22 02:40:19,389 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 46 transitions. Stem has 48 letters. Loop has 44 letters. [2022-07-22 02:40:19,390 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-22 02:40:19,391 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1282 states and 1787 transitions. [2022-07-22 02:40:19,405 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 58 [2022-07-22 02:40:19,423 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1282 states to 770 states and 1148 transitions. [2022-07-22 02:40:19,423 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 300 [2022-07-22 02:40:19,425 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 338 [2022-07-22 02:40:19,425 INFO L73 IsDeterministic]: Start isDeterministic. Operand 770 states and 1148 transitions. [2022-07-22 02:40:19,428 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-07-22 02:40:19,429 INFO L369 hiAutomatonCegarLoop]: Abstraction has 770 states and 1148 transitions. [2022-07-22 02:40:19,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 770 states and 1148 transitions. [2022-07-22 02:40:19,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 770 to 615. [2022-07-22 02:40:19,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 615 states, 375 states have (on average 1.1653333333333333) internal successors, (437), 399 states have internal predecessors, (437), 146 states have call successors, (160), 74 states have call predecessors, (160), 94 states have return successors, (270), 141 states have call predecessors, (270), 136 states have call successors, (270) [2022-07-22 02:40:19,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 615 states to 615 states and 867 transitions. [2022-07-22 02:40:19,473 INFO L392 hiAutomatonCegarLoop]: Abstraction has 615 states and 867 transitions. [2022-07-22 02:40:19,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 02:40:19,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-22 02:40:19,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2022-07-22 02:40:19,474 INFO L87 Difference]: Start difference. First operand 615 states and 867 transitions. Second operand has 24 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 15 states have internal predecessors, (43), 13 states have call successors, (13), 8 states have call predecessors, (13), 3 states have return successors, (6), 3 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-22 02:40:19,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 02:40:19,785 INFO L93 Difference]: Finished difference Result 747 states and 1037 transitions. [2022-07-22 02:40:19,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-22 02:40:19,786 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 747 states and 1037 transitions. [2022-07-22 02:40:19,792 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2022-07-22 02:40:19,801 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 747 states to 739 states and 1022 transitions. [2022-07-22 02:40:19,801 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 309 [2022-07-22 02:40:19,802 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 312 [2022-07-22 02:40:19,802 INFO L73 IsDeterministic]: Start isDeterministic. Operand 739 states and 1022 transitions. [2022-07-22 02:40:19,802 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-07-22 02:40:19,802 INFO L369 hiAutomatonCegarLoop]: Abstraction has 739 states and 1022 transitions. [2022-07-22 02:40:19,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 739 states and 1022 transitions. [2022-07-22 02:40:19,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 739 to 713. [2022-07-22 02:40:19,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 713 states, 436 states have (on average 1.1490825688073394) internal successors, (501), 461 states have internal predecessors, (501), 172 states have call successors, (186), 87 states have call predecessors, (186), 105 states have return successors, (307), 164 states have call predecessors, (307), 160 states have call successors, (307) [2022-07-22 02:40:19,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 994 transitions. [2022-07-22 02:40:19,822 INFO L392 hiAutomatonCegarLoop]: Abstraction has 713 states and 994 transitions. [2022-07-22 02:40:19,822 INFO L374 stractBuchiCegarLoop]: Abstraction has 713 states and 994 transitions. [2022-07-22 02:40:19,822 INFO L287 stractBuchiCegarLoop]: ======== Iteration 6 ============ [2022-07-22 02:40:19,822 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 713 states and 994 transitions. [2022-07-22 02:40:19,825 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2022-07-22 02:40:19,826 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-07-22 02:40:19,826 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-07-22 02:40:19,828 INFO L179 hiAutomatonCegarLoop]: Counterexample stem histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 02:40:19,828 INFO L180 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2022-07-22 02:40:19,828 INFO L752 eck$LassoCheckResult]: Stem: 6320#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(12, 2);call #Ultimate.allocInit(12, 3); 6321#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~ret6#1, main_~x~0#1, main_~result~0#1;main_~x~0#1 := 10; 6337#L27 call main_#t~ret6#1 := fibo(main_~x~0#1);< 6338#fiboENTRY ~n := #in~n; 6392#L8 assume !(~n < 1); 6391#L10 assume !(1 == ~n); 6387#L13 call #t~ret4 := fibo(~n - 1);< 6390#fiboENTRY ~n := #in~n; 6389#L8 assume !(~n < 1); 6388#L10 assume !(1 == ~n); 6383#L13 call #t~ret4 := fibo(~n - 1);< 6386#fiboENTRY ~n := #in~n; 6385#L8 assume !(~n < 1); 6384#L10 assume !(1 == ~n); 6379#L13 call #t~ret4 := fibo(~n - 1);< 6382#fiboENTRY ~n := #in~n; 6381#L8 assume !(~n < 1); 6380#L10 assume !(1 == ~n); 6375#L13 call #t~ret4 := fibo(~n - 1);< 6378#fiboENTRY ~n := #in~n; 6377#L8 assume !(~n < 1); 6376#L10 assume !(1 == ~n); 6371#L13 call #t~ret4 := fibo(~n - 1);< 6374#fiboENTRY ~n := #in~n; 6373#L8 assume !(~n < 1); 6372#L10 assume !(1 == ~n); 6359#L13 call #t~ret4 := fibo(~n - 1);< 6370#fiboENTRY ~n := #in~n; 6369#L8 assume !(~n < 1); 6368#L10 assume !(1 == ~n); 6364#L13 call #t~ret4 := fibo(~n - 1);< 6363#fiboENTRY ~n := #in~n; 6367#L8 assume !(~n < 1); 6648#L10 assume !(1 == ~n); 6365#L13 call #t~ret4 := fibo(~n - 1);< 6363#fiboENTRY ~n := #in~n; 6366#L8 assume !(~n < 1); 6875#L10 assume 1 == ~n;#res := 1; 6874#fiboFINAL assume true; 6730#fiboEXIT >#33#return; 6671#L13-1 call #t~ret5 := fibo(~n - 2);< 6676#fiboENTRY ~n := #in~n; 6942#L8 assume !(~n < 1); 6884#L10 assume !(1 == ~n); 6886#L13 call #t~ret4 := fibo(~n - 1);< 6920#fiboENTRY ~n := #in~n; 6947#L8 assume !(~n < 1); 6922#L10 assume !(1 == ~n); 6923#L13 call #t~ret4 := fibo(~n - 1);< 6938#fiboENTRY [2022-07-22 02:40:19,829 INFO L754 eck$LassoCheckResult]: Loop: 6938#fiboENTRY ~n := #in~n; 6944#L8 assume !(~n < 1); 6943#L10 assume !(1 == ~n); 6937#L13 call #t~ret4 := fibo(~n - 1);< 6938#fiboENTRY [2022-07-22 02:40:19,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 02:40:19,829 INFO L85 PathProgramCache]: Analyzing trace with hash 134483699, now seen corresponding path program 1 times [2022-07-22 02:40:19,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 02:40:19,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279777156] [2022-07-22 02:40:19,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 02:40:19,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 02:40:19,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 02:40:19,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-07-22 02:40:19,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 02:40:20,017 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 70 proven. 136 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-22 02:40:20,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 02:40:20,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279777156] [2022-07-22 02:40:20,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279777156] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 02:40:20,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685403403] [2022-07-22 02:40:20,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 02:40:20,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 02:40:20,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 02:40:20,020 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 02:40:20,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-07-22 02:40:20,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 02:40:20,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-22 02:40:20,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 02:40:20,111 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 70 proven. 136 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-22 02:40:20,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 02:40:20,196 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 70 proven. 136 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-22 02:40:20,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685403403] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 02:40:20,196 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 02:40:20,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 23 [2022-07-22 02:40:20,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146078448] [2022-07-22 02:40:20,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 02:40:20,197 INFO L757 eck$LassoCheckResult]: stem already infeasible [2022-07-22 02:40:20,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 02:40:20,197 INFO L85 PathProgramCache]: Analyzing trace with hash 1450956, now seen corresponding path program 2 times [2022-07-22 02:40:20,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 02:40:20,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731583108] [2022-07-22 02:40:20,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 02:40:20,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 02:40:20,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 02:40:20,200 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 02:40:20,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 02:40:20,202 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 02:40:20,224 INFO L210 LassoAnalysis]: Preferences: [2022-07-22 02:40:20,224 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-07-22 02:40:20,225 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-07-22 02:40:20,225 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-07-22 02:40:20,225 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2022-07-22 02:40:20,225 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 02:40:20,225 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-07-22 02:40:20,225 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-07-22 02:40:20,225 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-2.c_Iteration6_Loop [2022-07-22 02:40:20,225 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-07-22 02:40:20,225 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-07-22 02:40:20,226 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 02:40:20,228 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 02:40:20,229 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 02:40:20,231 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 02:40:20,232 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 02:40:20,259 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-07-22 02:40:20,260 INFO L404 LassoAnalysis]: Checking for nontermination... [2022-07-22 02:40:20,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 02:40:20,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 02:40:20,273 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 02:40:20,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (34)] Waiting until timeout for monitored process [2022-07-22 02:40:20,275 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-22 02:40:20,276 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-22 02:40:20,297 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-07-22 02:40:20,297 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret4=0} Honda state: {fibo_#t~ret4=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-07-22 02:40:20,316 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (34)] Forceful destruction successful, exit code 0 [2022-07-22 02:40:20,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 02:40:20,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 02:40:20,328 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 02:40:20,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (35)] Waiting until timeout for monitored process [2022-07-22 02:40:20,331 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-22 02:40:20,331 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-22 02:40:20,363 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-07-22 02:40:20,364 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_~n=0} Honda state: {fibo_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-07-22 02:40:20,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (35)] Forceful destruction successful, exit code 0 [2022-07-22 02:40:20,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 02:40:20,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 02:40:20,391 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 02:40:20,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (36)] Waiting until timeout for monitored process [2022-07-22 02:40:20,396 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-22 02:40:20,396 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-22 02:40:20,410 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-07-22 02:40:20,410 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-07-22 02:40:20,428 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 [2022-07-22 02:40:20,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 02:40:20,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 02:40:20,431 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 02:40:20,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (37)] Waiting until timeout for monitored process [2022-07-22 02:40:20,433 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-22 02:40:20,434 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-22 02:40:20,440 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-07-22 02:40:20,440 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret5=0} Honda state: {fibo_#t~ret5=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-07-22 02:40:20,458 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 [2022-07-22 02:40:20,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 02:40:20,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 02:40:20,460 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 02:40:20,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (38)] Waiting until timeout for monitored process [2022-07-22 02:40:20,462 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-22 02:40:20,462 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-22 02:40:20,487 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 [2022-07-22 02:40:20,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 02:40:20,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 02:40:20,490 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 02:40:20,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (39)] Waiting until timeout for monitored process [2022-07-22 02:40:20,493 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2022-07-22 02:40:20,493 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-22 02:40:20,552 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2022-07-22 02:40:20,557 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (39)] Forceful destruction successful, exit code 0 [2022-07-22 02:40:20,557 INFO L210 LassoAnalysis]: Preferences: [2022-07-22 02:40:20,558 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-07-22 02:40:20,558 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-07-22 02:40:20,558 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-07-22 02:40:20,558 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2022-07-22 02:40:20,558 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 02:40:20,558 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-07-22 02:40:20,558 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-07-22 02:40:20,558 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-2.c_Iteration6_Loop [2022-07-22 02:40:20,558 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-07-22 02:40:20,558 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-07-22 02:40:20,558 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 02:40:20,568 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 02:40:20,569 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 02:40:20,574 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 02:40:20,575 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 02:40:20,620 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-07-22 02:40:20,621 INFO L490 LassoAnalysis]: Using template 'affine'. [2022-07-22 02:40:20,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 02:40:20,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 02:40:20,628 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 02:40:20,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (40)] Waiting until timeout for monitored process [2022-07-22 02:40:20,636 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2022-07-22 02:40:20,641 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-22 02:40:20,642 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-22 02:40:20,642 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-22 02:40:20,642 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-22 02:40:20,642 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-22 02:40:20,642 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-22 02:40:20,643 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-22 02:40:20,658 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-07-22 02:40:20,676 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 [2022-07-22 02:40:20,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 02:40:20,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 02:40:20,678 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 02:40:20,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (41)] Waiting until timeout for monitored process [2022-07-22 02:40:20,683 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2022-07-22 02:40:20,688 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-22 02:40:20,689 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-22 02:40:20,689 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-22 02:40:20,689 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-22 02:40:20,689 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-22 02:40:20,689 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-22 02:40:20,689 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-22 02:40:20,691 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-07-22 02:40:20,707 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (41)] Ended with exit code 0 [2022-07-22 02:40:20,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 02:40:20,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 02:40:20,708 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 02:40:20,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (42)] Waiting until timeout for monitored process [2022-07-22 02:40:20,711 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2022-07-22 02:40:20,716 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-22 02:40:20,716 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-22 02:40:20,716 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-22 02:40:20,716 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-22 02:40:20,717 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-22 02:40:20,717 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-22 02:40:20,717 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-22 02:40:20,732 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-07-22 02:40:20,748 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (42)] Forceful destruction successful, exit code 0 [2022-07-22 02:40:20,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 02:40:20,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 02:40:20,749 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 02:40:20,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (43)] Waiting until timeout for monitored process [2022-07-22 02:40:20,752 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2022-07-22 02:40:20,757 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-22 02:40:20,757 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-22 02:40:20,757 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-22 02:40:20,757 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-22 02:40:20,757 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-22 02:40:20,758 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-22 02:40:20,758 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-22 02:40:20,773 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-07-22 02:40:20,791 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 [2022-07-22 02:40:20,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 02:40:20,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 02:40:20,793 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 02:40:20,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (44)] Waiting until timeout for monitored process [2022-07-22 02:40:20,795 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2022-07-22 02:40:20,801 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-22 02:40:20,801 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-22 02:40:20,801 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-22 02:40:20,801 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-22 02:40:20,801 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-22 02:40:20,802 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-22 02:40:20,802 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-22 02:40:20,817 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2022-07-22 02:40:20,819 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2022-07-22 02:40:20,819 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2022-07-22 02:40:20,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 02:40:20,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 02:40:20,821 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 02:40:20,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (45)] Waiting until timeout for monitored process [2022-07-22 02:40:20,823 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2022-07-22 02:40:20,823 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2022-07-22 02:40:20,823 INFO L513 LassoAnalysis]: Proved termination. [2022-07-22 02:40:20,823 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_#in~n) = 1*fibo_#in~n Supporting invariants [] [2022-07-22 02:40:20,839 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (44)] Ended with exit code 0 [2022-07-22 02:40:20,840 INFO L293 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2022-07-22 02:40:20,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 02:40:20,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 02:40:20,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-22 02:40:20,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 02:40:20,974 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (45)] Forceful destruction successful, exit code 0 [2022-07-22 02:40:21,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 02:40:21,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-22 02:40:21,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 02:40:21,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 02:40:21,044 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2022-07-22 02:40:21,044 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 713 states and 994 transitions. cyclomatic complexity: 291 Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-22 02:40:21,089 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 713 states and 994 transitions. cyclomatic complexity: 291. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Result 738 states and 1019 transitions. Complement of second has 13 states. [2022-07-22 02:40:21,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2022-07-22 02:40:21,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-22 02:40:21,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 13 transitions. [2022-07-22 02:40:21,091 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 13 transitions. Stem has 49 letters. Loop has 4 letters. [2022-07-22 02:40:21,091 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-22 02:40:21,091 INFO L577 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2022-07-22 02:40:21,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 02:40:21,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 02:40:21,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-22 02:40:21,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 02:40:21,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 02:40:21,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-22 02:40:21,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 02:40:21,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 02:40:21,246 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 3 loop predicates [2022-07-22 02:40:21,246 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 713 states and 994 transitions. cyclomatic complexity: 291 Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-22 02:40:21,292 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 713 states and 994 transitions. cyclomatic complexity: 291. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Result 738 states and 1019 transitions. Complement of second has 13 states. [2022-07-22 02:40:21,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2022-07-22 02:40:21,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-22 02:40:21,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 13 transitions. [2022-07-22 02:40:21,294 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 13 transitions. Stem has 49 letters. Loop has 4 letters. [2022-07-22 02:40:21,294 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-22 02:40:21,294 INFO L577 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2022-07-22 02:40:21,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 02:40:21,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 02:40:21,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-22 02:40:21,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 02:40:21,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 02:40:21,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-22 02:40:21,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 02:40:21,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 02:40:21,500 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2022-07-22 02:40:21,500 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 713 states and 994 transitions. cyclomatic complexity: 291 Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-22 02:40:21,576 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 713 states and 994 transitions. cyclomatic complexity: 291. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Result 959 states and 1259 transitions. Complement of second has 14 states. [2022-07-22 02:40:21,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2022-07-22 02:40:21,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-22 02:40:21,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 21 transitions. [2022-07-22 02:40:21,577 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 49 letters. Loop has 4 letters. [2022-07-22 02:40:21,578 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-22 02:40:21,578 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 53 letters. Loop has 4 letters. [2022-07-22 02:40:21,578 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-22 02:40:21,578 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 49 letters. Loop has 8 letters. [2022-07-22 02:40:21,579 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-22 02:40:21,579 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 959 states and 1259 transitions. [2022-07-22 02:40:21,586 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2022-07-22 02:40:21,593 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 959 states to 770 states and 1058 transitions. [2022-07-22 02:40:21,593 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 254 [2022-07-22 02:40:21,593 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 263 [2022-07-22 02:40:21,594 INFO L73 IsDeterministic]: Start isDeterministic. Operand 770 states and 1058 transitions. [2022-07-22 02:40:21,594 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-07-22 02:40:21,594 INFO L369 hiAutomatonCegarLoop]: Abstraction has 770 states and 1058 transitions. [2022-07-22 02:40:21,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 770 states and 1058 transitions. [2022-07-22 02:40:21,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 770 to 737. [2022-07-22 02:40:21,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 737 states, 459 states have (on average 1.1416122004357299) internal successors, (524), 484 states have internal predecessors, (524), 173 states have call successors, (187), 88 states have call predecessors, (187), 105 states have return successors, (307), 164 states have call predecessors, (307), 160 states have call successors, (307) [2022-07-22 02:40:21,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 1018 transitions. [2022-07-22 02:40:21,609 INFO L392 hiAutomatonCegarLoop]: Abstraction has 737 states and 1018 transitions. [2022-07-22 02:40:21,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 02:40:21,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-22 02:40:21,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2022-07-22 02:40:21,610 INFO L87 Difference]: Start difference. First operand 737 states and 1018 transitions. Second operand has 23 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 15 states have internal predecessors, (39), 10 states have call successors, (11), 10 states have call predecessors, (11), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-22 02:40:21,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 02:40:21,864 INFO L93 Difference]: Finished difference Result 879 states and 1234 transitions. [2022-07-22 02:40:21,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-22 02:40:21,864 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 879 states and 1234 transitions. [2022-07-22 02:40:21,872 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2022-07-22 02:40:21,879 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 879 states to 857 states and 1204 transitions. [2022-07-22 02:40:21,880 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 298 [2022-07-22 02:40:21,880 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 301 [2022-07-22 02:40:21,880 INFO L73 IsDeterministic]: Start isDeterministic. Operand 857 states and 1204 transitions. [2022-07-22 02:40:21,880 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-07-22 02:40:21,881 INFO L369 hiAutomatonCegarLoop]: Abstraction has 857 states and 1204 transitions. [2022-07-22 02:40:21,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 857 states and 1204 transitions. [2022-07-22 02:40:21,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 857 to 789. [2022-07-22 02:40:21,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 789 states, 492 states have (on average 1.136178861788618) internal successors, (559), 517 states have internal predecessors, (559), 192 states have call successors, (208), 99 states have call predecessors, (208), 105 states have return successors, (306), 172 states have call predecessors, (306), 179 states have call successors, (306) [2022-07-22 02:40:21,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 789 states to 789 states and 1073 transitions. [2022-07-22 02:40:21,902 INFO L392 hiAutomatonCegarLoop]: Abstraction has 789 states and 1073 transitions. [2022-07-22 02:40:21,902 INFO L374 stractBuchiCegarLoop]: Abstraction has 789 states and 1073 transitions. [2022-07-22 02:40:21,903 INFO L287 stractBuchiCegarLoop]: ======== Iteration 7 ============ [2022-07-22 02:40:21,903 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 789 states and 1073 transitions. [2022-07-22 02:40:21,907 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2022-07-22 02:40:21,907 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-07-22 02:40:21,907 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-07-22 02:40:21,910 INFO L179 hiAutomatonCegarLoop]: Counterexample stem histogram [13, 13, 12, 11, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 02:40:21,910 INFO L180 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2022-07-22 02:40:21,911 INFO L752 eck$LassoCheckResult]: Stem: 11970#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(12, 2);call #Ultimate.allocInit(12, 3); 11971#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~ret6#1, main_~x~0#1, main_~result~0#1;main_~x~0#1 := 10; 11985#L27 call main_#t~ret6#1 := fibo(main_~x~0#1);< 11986#fiboENTRY ~n := #in~n; 12101#L8 assume !(~n < 1); 12099#L10 assume !(1 == ~n); 12071#L13 call #t~ret4 := fibo(~n - 1);< 12096#fiboENTRY ~n := #in~n; 12547#L8 assume !(~n < 1); 12468#L10 assume !(1 == ~n); 12074#L13 call #t~ret4 := fibo(~n - 1);< 12075#fiboENTRY ~n := #in~n; 12112#L8 assume !(~n < 1); 12111#L10 assume !(1 == ~n); 12104#L13 call #t~ret4 := fibo(~n - 1);< 12110#fiboENTRY ~n := #in~n; 12409#L8 assume !(~n < 1); 12408#L10 assume !(1 == ~n); 12143#L13 call #t~ret4 := fibo(~n - 1);< 12162#fiboENTRY ~n := #in~n; 12171#L8 assume !(~n < 1); 12165#L10 assume !(1 == ~n); 12132#L13 call #t~ret4 := fibo(~n - 1);< 12144#fiboENTRY ~n := #in~n; 12261#L8 assume !(~n < 1); 12258#L10 assume !(1 == ~n); 12234#L13 call #t~ret4 := fibo(~n - 1);< 12240#fiboENTRY ~n := #in~n; 12239#L8 assume !(~n < 1); 12237#L10 assume !(1 == ~n); 12154#L13 call #t~ret4 := fibo(~n - 1);< 12235#fiboENTRY ~n := #in~n; 12263#L8 assume !(~n < 1); 12262#L10 assume !(1 == ~n); 12251#L13 call #t~ret4 := fibo(~n - 1);< 12260#fiboENTRY ~n := #in~n; 12440#L8 assume !(~n < 1); 12438#L10 assume !(1 == ~n); 12252#L13 call #t~ret4 := fibo(~n - 1);< 12260#fiboENTRY ~n := #in~n; 12441#L8 assume !(~n < 1); 12625#L10 assume 1 == ~n;#res := 1; 12624#fiboFINAL assume true; 12622#fiboEXIT >#33#return; 12618#L13-1 call #t~ret5 := fibo(~n - 2);< 12619#fiboENTRY ~n := #in~n; 12642#L8 assume !(~n < 1); 12643#L10 assume !(1 == ~n); 12648#L13 call #t~ret4 := fibo(~n - 1);< 12657#fiboENTRY ~n := #in~n; 12712#L8 assume !(~n < 1); 12714#L10 assume !(1 == ~n); 12029#L13 call #t~ret4 := fibo(~n - 1);< 12026#fiboENTRY ~n := #in~n; 12030#L8 assume !(~n < 1); 12718#L10 assume !(1 == ~n); 12027#L13 [2022-07-22 02:40:21,912 INFO L754 eck$LassoCheckResult]: Loop: 12027#L13 call #t~ret4 := fibo(~n - 1);< 12026#fiboENTRY ~n := #in~n; 12030#L8 assume !(~n < 1); 12718#L10 assume !(1 == ~n); 12027#L13 [2022-07-22 02:40:21,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 02:40:21,912 INFO L85 PathProgramCache]: Analyzing trace with hash -486527177, now seen corresponding path program 2 times [2022-07-22 02:40:21,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 02:40:21,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003312223] [2022-07-22 02:40:21,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 02:40:21,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 02:40:21,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 02:40:22,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-07-22 02:40:22,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 02:40:22,108 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 256 proven. 27 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-22 02:40:22,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 02:40:22,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003312223] [2022-07-22 02:40:22,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003312223] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 02:40:22,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438802417] [2022-07-22 02:40:22,109 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 02:40:22,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 02:40:22,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 02:40:22,132 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 02:40:22,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-07-22 02:40:22,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 02:40:22,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 02:40:22,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-22 02:40:22,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 02:40:22,228 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 256 proven. 27 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-22 02:40:22,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 02:40:22,286 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 256 proven. 27 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-22 02:40:22,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438802417] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 02:40:22,286 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 02:40:22,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 23 [2022-07-22 02:40:22,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133423761] [2022-07-22 02:40:22,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 02:40:22,286 INFO L757 eck$LassoCheckResult]: stem already infeasible [2022-07-22 02:40:22,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 02:40:22,287 INFO L85 PathProgramCache]: Analyzing trace with hash 1893846, now seen corresponding path program 3 times [2022-07-22 02:40:22,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 02:40:22,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052849242] [2022-07-22 02:40:22,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 02:40:22,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 02:40:22,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 02:40:22,289 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 02:40:22,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 02:40:22,291 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 02:40:22,324 INFO L210 LassoAnalysis]: Preferences: [2022-07-22 02:40:22,324 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-07-22 02:40:22,324 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-07-22 02:40:22,324 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-07-22 02:40:22,324 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2022-07-22 02:40:22,324 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 02:40:22,324 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-07-22 02:40:22,324 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-07-22 02:40:22,324 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-2.c_Iteration7_Loop [2022-07-22 02:40:22,324 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-07-22 02:40:22,324 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-07-22 02:40:22,325 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 02:40:22,330 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 02:40:22,331 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 02:40:22,333 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 02:40:22,363 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-07-22 02:40:22,363 INFO L404 LassoAnalysis]: Checking for nontermination... [2022-07-22 02:40:22,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 02:40:22,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 02:40:22,365 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 02:40:22,392 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-07-22 02:40:22,392 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-22 02:40:22,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (47)] Waiting until timeout for monitored process [2022-07-22 02:40:22,452 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (47)] Forceful destruction successful, exit code 0 [2022-07-22 02:40:22,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 02:40:22,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 02:40:22,468 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 02:40:22,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (48)] Waiting until timeout for monitored process [2022-07-22 02:40:22,471 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2022-07-22 02:40:22,471 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-07-22 02:40:24,325 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2022-07-22 02:40:24,329 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 [2022-07-22 02:40:24,329 INFO L210 LassoAnalysis]: Preferences: [2022-07-22 02:40:24,329 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-07-22 02:40:24,329 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-07-22 02:40:24,329 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-07-22 02:40:24,329 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2022-07-22 02:40:24,330 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 02:40:24,330 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-07-22 02:40:24,330 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-07-22 02:40:24,330 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-2.c_Iteration7_Loop [2022-07-22 02:40:24,330 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-07-22 02:40:24,330 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-07-22 02:40:24,330 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 02:40:24,332 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 02:40:24,334 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 02:40:24,335 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-07-22 02:40:24,359 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-07-22 02:40:24,359 INFO L490 LassoAnalysis]: Using template 'affine'. [2022-07-22 02:40:24,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 02:40:24,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 02:40:24,362 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 02:40:24,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (49)] Waiting until timeout for monitored process [2022-07-22 02:40:24,365 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2022-07-22 02:40:24,371 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-22 02:40:24,371 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-22 02:40:24,371 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-22 02:40:24,371 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-22 02:40:24,371 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-22 02:40:24,372 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-22 02:40:24,372 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-22 02:40:24,373 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-07-22 02:40:24,388 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (49)] Forceful destruction successful, exit code 0 [2022-07-22 02:40:24,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 02:40:24,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 02:40:24,390 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 02:40:24,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (50)] Waiting until timeout for monitored process [2022-07-22 02:40:24,393 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2022-07-22 02:40:24,399 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-22 02:40:24,399 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-22 02:40:24,399 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-22 02:40:24,400 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-22 02:40:24,400 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-22 02:40:24,400 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-22 02:40:24,400 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-22 02:40:24,401 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-07-22 02:40:24,417 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (50)] Forceful destruction successful, exit code 0 [2022-07-22 02:40:24,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 02:40:24,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 02:40:24,420 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 02:40:24,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (51)] Waiting until timeout for monitored process [2022-07-22 02:40:24,422 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2022-07-22 02:40:24,428 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-22 02:40:24,428 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-22 02:40:24,428 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-22 02:40:24,428 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-22 02:40:24,428 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-22 02:40:24,430 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-22 02:40:24,430 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-22 02:40:24,432 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-07-22 02:40:24,448 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 [2022-07-22 02:40:24,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 02:40:24,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 02:40:24,449 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 02:40:24,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (52)] Waiting until timeout for monitored process [2022-07-22 02:40:24,452 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2022-07-22 02:40:24,458 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-07-22 02:40:24,458 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-07-22 02:40:24,458 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-07-22 02:40:24,458 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-07-22 02:40:24,458 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-07-22 02:40:24,459 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-07-22 02:40:24,459 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-07-22 02:40:24,474 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2022-07-22 02:40:24,475 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2022-07-22 02:40:24,476 INFO L444 ModelExtractionUtils]: 2 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. [2022-07-22 02:40:24,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-07-22 02:40:24,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 02:40:24,477 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-07-22 02:40:24,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (53)] Waiting until timeout for monitored process [2022-07-22 02:40:24,479 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2022-07-22 02:40:24,479 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2022-07-22 02:40:24,479 INFO L513 LassoAnalysis]: Proved termination. [2022-07-22 02:40:24,479 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2022-07-22 02:40:24,495 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (52)] Ended with exit code 0 [2022-07-22 02:40:24,495 INFO L293 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2022-07-22 02:40:24,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 02:40:24,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 02:40:24,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-22 02:40:24,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 02:40:24,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 02:40:24,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-22 02:40:24,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 02:40:24,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 02:40:24,705 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 4 loop predicates [2022-07-22 02:40:24,706 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 789 states and 1073 transitions. cyclomatic complexity: 294 Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-22 02:40:24,756 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 789 states and 1073 transitions. cyclomatic complexity: 294. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Result 816 states and 1101 transitions. Complement of second has 18 states. [2022-07-22 02:40:24,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2022-07-22 02:40:24,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-22 02:40:24,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 13 transitions. [2022-07-22 02:40:24,790 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 13 transitions. Stem has 56 letters. Loop has 4 letters. [2022-07-22 02:40:24,790 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-22 02:40:24,790 INFO L577 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2022-07-22 02:40:24,797 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (53)] Forceful destruction successful, exit code 0 [2022-07-22 02:40:24,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 02:40:24,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 02:40:24,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-22 02:40:24,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 02:40:24,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 02:40:24,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-22 02:40:24,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 02:40:24,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 02:40:24,965 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 4 loop predicates [2022-07-22 02:40:24,965 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 789 states and 1073 transitions. cyclomatic complexity: 294 Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-22 02:40:25,024 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 789 states and 1073 transitions. cyclomatic complexity: 294. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Result 1046 states and 1417 transitions. Complement of second has 22 states. [2022-07-22 02:40:25,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2022-07-22 02:40:25,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-22 02:40:25,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 16 transitions. [2022-07-22 02:40:25,025 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 56 letters. Loop has 4 letters. [2022-07-22 02:40:25,026 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-22 02:40:25,026 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 60 letters. Loop has 4 letters. [2022-07-22 02:40:25,026 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-22 02:40:25,026 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 56 letters. Loop has 8 letters. [2022-07-22 02:40:25,026 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-07-22 02:40:25,026 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1046 states and 1417 transitions. [2022-07-22 02:40:25,034 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2022-07-22 02:40:25,048 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1046 states to 967 states and 1333 transitions. [2022-07-22 02:40:25,049 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 299 [2022-07-22 02:40:25,049 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 327 [2022-07-22 02:40:25,049 INFO L73 IsDeterministic]: Start isDeterministic. Operand 967 states and 1333 transitions. [2022-07-22 02:40:25,050 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-07-22 02:40:25,050 INFO L369 hiAutomatonCegarLoop]: Abstraction has 967 states and 1333 transitions. [2022-07-22 02:40:25,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 967 states and 1333 transitions. [2022-07-22 02:40:25,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 967 to 950. [2022-07-22 02:40:25,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 950 states, 600 states have (on average 1.125) internal successors, (675), 631 states have internal predecessors, (675), 225 states have call successors, (259), 126 states have call predecessors, (259), 125 states have return successors, (374), 192 states have call predecessors, (374), 212 states have call successors, (374) [2022-07-22 02:40:25,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 950 states to 950 states and 1308 transitions. [2022-07-22 02:40:25,075 INFO L392 hiAutomatonCegarLoop]: Abstraction has 950 states and 1308 transitions. [2022-07-22 02:40:25,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 02:40:25,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-22 02:40:25,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=373, Unknown=0, NotChecked=0, Total=506 [2022-07-22 02:40:25,075 INFO L87 Difference]: Start difference. First operand 950 states and 1308 transitions. Second operand has 23 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 13 states have internal predecessors, (38), 11 states have call successors, (12), 12 states have call predecessors, (12), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-22 02:40:25,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 02:40:25,400 INFO L93 Difference]: Finished difference Result 565 states and 661 transitions. [2022-07-22 02:40:25,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-22 02:40:25,401 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 565 states and 661 transitions. [2022-07-22 02:40:25,406 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2022-07-22 02:40:25,406 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 565 states to 0 states and 0 transitions. [2022-07-22 02:40:25,406 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2022-07-22 02:40:25,406 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2022-07-22 02:40:25,407 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2022-07-22 02:40:25,407 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 02:40:25,407 INFO L369 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-07-22 02:40:25,407 INFO L392 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-07-22 02:40:25,407 INFO L374 stractBuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-07-22 02:40:25,407 INFO L287 stractBuchiCegarLoop]: ======== Iteration 8 ============ [2022-07-22 02:40:25,407 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2022-07-22 02:40:25,407 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2022-07-22 02:40:25,407 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2022-07-22 02:40:25,413 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 22.07 02:40:25 BoogieIcfgContainer [2022-07-22 02:40:25,413 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2022-07-22 02:40:25,414 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-22 02:40:25,414 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-22 02:40:25,414 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-22 02:40:25,414 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 02:40:10" (3/4) ... [2022-07-22 02:40:25,417 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-07-22 02:40:25,417 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-22 02:40:25,417 INFO L158 Benchmark]: Toolchain (without parser) took 14951.84ms. Allocated memory was 54.5MB in the beginning and 146.8MB in the end (delta: 92.3MB). Free memory was 32.9MB in the beginning and 49.1MB in the end (delta: -16.2MB). Peak memory consumption was 75.0MB. Max. memory is 16.1GB. [2022-07-22 02:40:25,417 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 54.5MB. Free memory was 36.2MB in the beginning and 36.1MB in the end (delta: 52.0kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-22 02:40:25,418 INFO L158 Benchmark]: CACSL2BoogieTranslator took 130.95ms. Allocated memory is still 54.5MB. Free memory was 32.6MB in the beginning and 23.4MB in the end (delta: 9.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-22 02:40:25,418 INFO L158 Benchmark]: Boogie Procedure Inliner took 46.29ms. Allocated memory was 54.5MB in the beginning and 69.2MB in the end (delta: 14.7MB). Free memory was 23.4MB in the beginning and 52.4MB in the end (delta: -29.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-07-22 02:40:25,418 INFO L158 Benchmark]: Boogie Preprocessor took 10.67ms. Allocated memory is still 69.2MB. Free memory was 52.4MB in the beginning and 51.7MB in the end (delta: 782.1kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-22 02:40:25,418 INFO L158 Benchmark]: RCFGBuilder took 227.98ms. Allocated memory is still 69.2MB. Free memory was 51.5MB in the beginning and 43.3MB in the end (delta: 8.2MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-07-22 02:40:25,419 INFO L158 Benchmark]: BuchiAutomizer took 14527.40ms. Allocated memory was 69.2MB in the beginning and 146.8MB in the end (delta: 77.6MB). Free memory was 43.1MB in the beginning and 50.1MB in the end (delta: -7.0MB). Peak memory consumption was 71.8MB. Max. memory is 16.1GB. [2022-07-22 02:40:25,419 INFO L158 Benchmark]: Witness Printer took 2.99ms. Allocated memory is still 146.8MB. Free memory was 50.1MB in the beginning and 49.1MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-22 02:40:25,420 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 54.5MB. Free memory was 36.2MB in the beginning and 36.1MB in the end (delta: 52.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 130.95ms. Allocated memory is still 54.5MB. Free memory was 32.6MB in the beginning and 23.4MB in the end (delta: 9.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 46.29ms. Allocated memory was 54.5MB in the beginning and 69.2MB in the end (delta: 14.7MB). Free memory was 23.4MB in the beginning and 52.4MB in the end (delta: -29.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 10.67ms. Allocated memory is still 69.2MB. Free memory was 52.4MB in the beginning and 51.7MB in the end (delta: 782.1kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 227.98ms. Allocated memory is still 69.2MB. Free memory was 51.5MB in the beginning and 43.3MB in the end (delta: 8.2MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * BuchiAutomizer took 14527.40ms. Allocated memory was 69.2MB in the beginning and 146.8MB in the end (delta: 77.6MB). Free memory was 43.1MB in the beginning and 50.1MB in the end (delta: -7.0MB). Peak memory consumption was 71.8MB. Max. memory is 16.1GB. * Witness Printer took 2.99ms. Allocated memory is still 146.8MB. Free memory was 50.1MB in the beginning and 49.1MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 11 terminating modules (6 trivial, 3 deterministic, 2 nondeterministic). One deterministic module has affine ranking function \old(n) and consists of 4 locations. One deterministic module has affine ranking function n and consists of 9 locations. One deterministic module has affine ranking function n and consists of 7 locations. One nondeterministic module has affine ranking function n and consists of 10 locations. One nondeterministic module has affine ranking function \old(n) and consists of 5 locations. 6 modules have a trivial ranking function, the largest among these consists of 24 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 14.4s and 8 iterations. TraceHistogramMax:13. Analysis of lassos took 9.2s. Construction of modules took 0.9s. Büchi inclusion checks took 3.7s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 10. Automata minimization 0.2s AutomataMinimizationTime, 10 MinimizatonAttempts, 330 StatesRemovedByMinimization, 8 NontrivialMinimizations. Non-live state removal took 0.1s Buchi closure took 0.0s. Biggest automaton had -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, 1.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 671 mSDsluCounter, 812 SdHoareTripleChecker+Invalid, 1.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 564 mSDsCounter, 525 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1963 IncrementalHoareTripleChecker+Invalid, 2488 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 525 mSolverCounterUnsat, 248 mSDtfsCounter, 1963 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: 29ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 11 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 5 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 4.5s InitialAbstractionConstructionTime: 0.0s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! [2022-07-22 02:40:25,455 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-07-22 02:40:25,661 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-07-22 02:40:25,861 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-07-22 02:40:26,062 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-07-22 02:40:26,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-22 02:40:26,461 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-22 02:40:26,662 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE