./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/recursive-simple/fibo_5-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 20ed64ec 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_5-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(F end) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 66ecdb3150790d7b9fa430121dbc9b6f1f7ee64a .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-20ed64e [2021-08-27 16:28:57,353 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-27 16:28:57,355 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-27 16:28:57,382 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-27 16:28:57,382 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-27 16:28:57,385 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-27 16:28:57,385 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-27 16:28:57,389 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-27 16:28:57,391 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-27 16:28:57,397 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-27 16:28:57,398 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-27 16:28:57,401 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-27 16:28:57,401 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-27 16:28:57,403 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-27 16:28:57,404 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-27 16:28:57,406 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-27 16:28:57,407 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-27 16:28:57,407 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-27 16:28:57,409 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-27 16:28:57,414 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-27 16:28:57,415 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-27 16:28:57,415 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-27 16:28:57,416 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-27 16:28:57,417 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-27 16:28:57,420 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-27 16:28:57,421 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-27 16:28:57,421 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-27 16:28:57,422 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-27 16:28:57,423 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-27 16:28:57,423 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-27 16:28:57,424 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-27 16:28:57,424 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-27 16:28:57,425 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-27 16:28:57,426 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-27 16:28:57,427 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-27 16:28:57,427 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-27 16:28:57,427 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-27 16:28:57,427 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-27 16:28:57,428 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-27 16:28:57,429 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-27 16:28:57,429 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-27 16:28:57,430 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-32bit-Automizer_Default.epf [2021-08-27 16:28:57,461 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-27 16:28:57,461 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-27 16:28:57,462 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-27 16:28:57,462 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-27 16:28:57,463 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-27 16:28:57,463 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-27 16:28:57,463 INFO L138 SettingsManager]: * Use SBE=true [2021-08-27 16:28:57,463 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2021-08-27 16:28:57,464 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2021-08-27 16:28:57,464 INFO L138 SettingsManager]: * Use old map elimination=false [2021-08-27 16:28:57,464 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2021-08-27 16:28:57,464 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2021-08-27 16:28:57,464 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2021-08-27 16:28:57,464 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-27 16:28:57,465 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-27 16:28:57,465 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-08-27 16:28:57,465 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-27 16:28:57,465 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-27 16:28:57,465 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-27 16:28:57,465 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2021-08-27 16:28:57,465 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2021-08-27 16:28:57,465 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2021-08-27 16:28:57,465 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-27 16:28:57,465 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-27 16:28:57,466 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2021-08-27 16:28:57,466 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-27 16:28:57,466 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2021-08-27 16:28:57,466 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-27 16:28:57,466 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-27 16:28:57,466 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-27 16:28:57,466 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-27 16:28:57,466 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-27 16:28:57,467 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-08-27 16:28:57,467 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 66ecdb3150790d7b9fa430121dbc9b6f1f7ee64a [2021-08-27 16:28:57,735 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-27 16:28:57,751 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-27 16:28:57,753 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-27 16:28:57,753 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-27 16:28:57,754 INFO L275 PluginConnector]: CDTParser initialized [2021-08-27 16:28:57,755 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/fibo_5-1.c [2021-08-27 16:28:57,803 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/25f23d927/a030b4554d2b4f88a42624b5550a0d77/FLAGae3e68b37 [2021-08-27 16:28:58,140 INFO L306 CDTParser]: Found 1 translation units. [2021-08-27 16:28:58,140 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_5-1.c [2021-08-27 16:28:58,144 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/25f23d927/a030b4554d2b4f88a42624b5550a0d77/FLAGae3e68b37 [2021-08-27 16:28:58,579 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/25f23d927/a030b4554d2b4f88a42624b5550a0d77 [2021-08-27 16:28:58,581 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-27 16:28:58,582 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-27 16:28:58,584 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-27 16:28:58,584 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-27 16:28:58,586 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-27 16:28:58,586 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 04:28:58" (1/1) ... [2021-08-27 16:28:58,587 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22fb2aea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:28:58, skipping insertion in model container [2021-08-27 16:28:58,587 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 04:28:58" (1/1) ... [2021-08-27 16:28:58,592 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-27 16:28:58,600 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-27 16:28:58,670 WARN L228 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_5-1.c[740,753] [2021-08-27 16:28:58,671 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 16:28:58,676 INFO L203 MainTranslator]: Completed pre-run [2021-08-27 16:28:58,687 WARN L228 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_5-1.c[740,753] [2021-08-27 16:28:58,688 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 16:28:58,696 INFO L208 MainTranslator]: Completed translation [2021-08-27 16:28:58,696 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:28:58 WrapperNode [2021-08-27 16:28:58,697 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-27 16:28:58,697 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-27 16:28:58,697 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-27 16:28:58,698 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-27 16:28:58,723 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:28:58" (1/1) ... [2021-08-27 16:28:58,730 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:28:58" (1/1) ... [2021-08-27 16:28:58,741 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-27 16:28:58,742 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-27 16:28:58,742 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-27 16:28:58,742 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-27 16:28:58,747 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:28:58" (1/1) ... [2021-08-27 16:28:58,747 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:28:58" (1/1) ... [2021-08-27 16:28:58,748 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:28:58" (1/1) ... [2021-08-27 16:28:58,748 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:28:58" (1/1) ... [2021-08-27 16:28:58,752 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:28:58" (1/1) ... [2021-08-27 16:28:58,753 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:28:58" (1/1) ... [2021-08-27 16:28:58,757 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:28:58" (1/1) ... [2021-08-27 16:28:58,758 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-27 16:28:58,759 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-27 16:28:58,759 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-27 16:28:58,759 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-27 16:28:58,760 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:28:58" (1/1) ... [2021-08-27 16:28:58,765 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 16:28:58,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 16:28:58,785 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 16:28:58,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2021-08-27 16:28:58,816 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-27 16:28:58,816 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-27 16:28:58,816 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-27 16:28:58,816 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-27 16:28:58,816 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2021-08-27 16:28:58,816 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2021-08-27 16:28:58,963 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-27 16:28:58,963 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-08-27 16:28:58,964 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 04:28:58 BoogieIcfgContainer [2021-08-27 16:28:58,964 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-27 16:28:58,965 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2021-08-27 16:28:58,965 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2021-08-27 16:28:58,966 INFO L275 PluginConnector]: BuchiAutomizer initialized [2021-08-27 16:28:58,967 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-08-27 16:28:58,967 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 27.08 04:28:58" (1/3) ... [2021-08-27 16:28:58,967 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@70ea215f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 27.08 04:28:58, skipping insertion in model container [2021-08-27 16:28:58,967 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-08-27 16:28:58,968 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:28:58" (2/3) ... [2021-08-27 16:28:58,968 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@70ea215f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 27.08 04:28:58, skipping insertion in model container [2021-08-27 16:28:58,968 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-08-27 16:28:58,968 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 04:28:58" (3/3) ... [2021-08-27 16:28:58,969 INFO L389 chiAutomizerObserver]: Analyzing ICFG fibo_5-1.c [2021-08-27 16:28:59,027 INFO L359 BuchiCegarLoop]: Interprodecural is true [2021-08-27 16:28:59,027 INFO L360 BuchiCegarLoop]: Hoare is false [2021-08-27 16:28:59,027 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2021-08-27 16:28:59,027 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-27 16:28:59,028 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-27 16:28:59,028 INFO L364 BuchiCegarLoop]: Difference is false [2021-08-27 16:28:59,028 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-27 16:28:59,028 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2021-08-27 16:28:59,057 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-27 16:28:59,069 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-08-27 16:28:59,070 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-08-27 16:28:59,070 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-08-27 16:28:59,090 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2021-08-27 16:28:59,090 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2021-08-27 16:28:59,090 INFO L425 BuchiCegarLoop]: ======== Iteration 1============ [2021-08-27 16:28:59,091 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-27 16:28:59,092 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-08-27 16:28:59,093 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-08-27 16:28:59,093 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-08-27 16:28:59,093 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2021-08-27 16:28:59,093 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2021-08-27 16:28:59,097 INFO L791 eck$LassoCheckResult]: Stem: 4#ULTIMATE.startENTRYtrue #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(11);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 13#L-1true havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 5; 6#L27true call main_#t~ret9 := fibo(main_~x~0);< 7#fiboENTRYtrue [2021-08-27 16:28:59,098 INFO L793 eck$LassoCheckResult]: Loop: 7#fiboENTRYtrue ~n := #in~n; 8#L8true assume !(~n < 1); 10#L10true assume !(1 == ~n); 15#L13true call #t~ret7 := fibo(~n - 1);< 7#fiboENTRYtrue [2021-08-27 16:28:59,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 16:28:59,101 INFO L82 PathProgramCache]: Analyzing trace with hash 29883, now seen corresponding path program 1 times [2021-08-27 16:28:59,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 16:28:59,107 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604321395] [2021-08-27 16:28:59,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 16:28:59,108 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 16:28:59,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 16:28:59,207 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 16:28:59,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 16:28:59,251 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 16:28:59,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 16:28:59,255 INFO L82 PathProgramCache]: Analyzing trace with hash 1450956, now seen corresponding path program 1 times [2021-08-27 16:28:59,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 16:28:59,256 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372661637] [2021-08-27 16:28:59,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 16:28:59,256 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 16:28:59,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 16:28:59,266 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 16:28:59,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 16:28:59,277 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 16:28:59,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 16:28:59,280 INFO L82 PathProgramCache]: Analyzing trace with hash 1828301702, now seen corresponding path program 1 times [2021-08-27 16:28:59,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 16:28:59,281 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91476204] [2021-08-27 16:28:59,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 16:28:59,281 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 16:28:59,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 16:28:59,295 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 16:28:59,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 16:28:59,320 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 16:28:59,425 INFO L210 LassoAnalysis]: Preferences: [2021-08-27 16:28:59,425 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-08-27 16:28:59,425 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-08-27 16:28:59,425 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-08-27 16:28:59,426 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-08-27 16:28:59,426 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 16:28:59,426 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-08-27 16:28:59,426 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-08-27 16:28:59,426 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-1.c_Iteration1_Loop [2021-08-27 16:28:59,427 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-08-27 16:28:59,427 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-08-27 16:28:59,437 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:28:59,441 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:28:59,443 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:28:59,446 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:28:59,448 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:28:59,493 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-08-27 16:28:59,494 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-08-27 16:28:59,495 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 16:28:59,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 16:28:59,496 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 16:28:59,503 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-27 16:28:59,503 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 16:28:59,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Waiting until timeout for monitored process [2021-08-27 16:28:59,532 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-08-27 16:28:59,532 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_~n=0} Honda state: {fibo_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-08-27 16:28:59,553 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Forceful destruction successful, exit code 0 [2021-08-27 16:28:59,553 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 16:28:59,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 16:28:59,554 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 16:28:59,562 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-27 16:28:59,562 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 16:28:59,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Waiting until timeout for monitored process [2021-08-27 16:28:59,581 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-08-27 16:28:59,581 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-08-27 16:28:59,597 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Forceful destruction successful, exit code 0 [2021-08-27 16:28:59,597 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 16:28:59,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 16:28:59,598 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 16:28:59,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Waiting until timeout for monitored process [2021-08-27 16:28:59,607 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-27 16:28:59,609 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 16:28:59,621 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-08-27 16:28:59,622 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret7=0} Honda state: {fibo_#t~ret7=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-08-27 16:28:59,637 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Forceful destruction successful, exit code 0 [2021-08-27 16:28:59,637 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 16:28:59,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 16:28:59,640 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 16:28:59,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Waiting until timeout for monitored process [2021-08-27 16:28:59,642 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-27 16:28:59,642 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 16:28:59,665 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-08-27 16:28:59,666 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret8=0} Honda state: {fibo_#t~ret8=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-08-27 16:28:59,682 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Forceful destruction successful, exit code 0 [2021-08-27 16:28:59,682 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 16:28:59,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 16:28:59,683 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 16:28:59,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Waiting until timeout for monitored process [2021-08-27 16:28:59,686 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-27 16:28:59,686 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 16:28:59,718 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Forceful destruction successful, exit code 0 [2021-08-27 16:28:59,718 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 16:28:59,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 16:28:59,719 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 16:28:59,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Waiting until timeout for monitored process [2021-08-27 16:28:59,737 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-08-27 16:28:59,737 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 16:28:59,792 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-08-27 16:28:59,800 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Forceful destruction successful, exit code 0 [2021-08-27 16:28:59,801 INFO L210 LassoAnalysis]: Preferences: [2021-08-27 16:28:59,801 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-08-27 16:28:59,801 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-08-27 16:28:59,801 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-08-27 16:28:59,801 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-08-27 16:28:59,801 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 16:28:59,801 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-08-27 16:28:59,801 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-08-27 16:28:59,801 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-1.c_Iteration1_Loop [2021-08-27 16:28:59,801 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-08-27 16:28:59,801 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-08-27 16:28:59,802 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:28:59,804 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:28:59,806 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:28:59,809 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:28:59,811 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:28:59,854 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-08-27 16:28:59,856 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-08-27 16:28:59,857 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 16:28:59,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 16:28:59,861 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 16:28:59,871 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-08-27 16:28:59,878 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 16:28:59,878 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-08-27 16:28:59,878 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 16:28:59,879 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 16:28:59,879 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 16:28:59,880 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-08-27 16:28:59,880 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-08-27 16:28:59,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Waiting until timeout for monitored process [2021-08-27 16:28:59,897 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-08-27 16:28:59,912 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Forceful destruction successful, exit code 0 [2021-08-27 16:28:59,913 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 16:28:59,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 16:28:59,913 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 16:28:59,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Waiting until timeout for monitored process [2021-08-27 16:28:59,915 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-08-27 16:28:59,921 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 16:28:59,921 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-08-27 16:28:59,921 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 16:28:59,921 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 16:28:59,921 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 16:28:59,922 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-08-27 16:28:59,922 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-08-27 16:28:59,928 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-08-27 16:28:59,945 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Forceful destruction successful, exit code 0 [2021-08-27 16:28:59,946 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 16:28:59,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 16:28:59,947 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 16:28:59,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Waiting until timeout for monitored process [2021-08-27 16:28:59,949 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-08-27 16:28:59,955 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 16:28:59,955 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-08-27 16:28:59,955 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 16:28:59,955 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 16:28:59,955 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 16:28:59,955 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-08-27 16:28:59,956 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-08-27 16:28:59,960 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-08-27 16:28:59,977 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Forceful destruction successful, exit code 0 [2021-08-27 16:28:59,978 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 16:28:59,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 16:28:59,978 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 16:28:59,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Waiting until timeout for monitored process [2021-08-27 16:28:59,980 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-08-27 16:28:59,986 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 16:28:59,986 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-08-27 16:28:59,986 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 16:28:59,986 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 16:28:59,986 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 16:28:59,987 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-08-27 16:28:59,987 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-08-27 16:28:59,990 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-08-27 16:29:00,010 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Ended with exit code 0 [2021-08-27 16:29:00,010 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 16:29:00,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 16:29:00,011 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 16:29:00,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Waiting until timeout for monitored process [2021-08-27 16:29:00,013 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-08-27 16:29:00,019 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 16:29:00,019 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-08-27 16:29:00,019 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 16:29:00,019 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 16:29:00,019 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 16:29:00,020 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-08-27 16:29:00,020 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-08-27 16:29:00,027 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-08-27 16:29:00,030 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-08-27 16:29:00,030 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-08-27 16:29:00,031 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 16:29:00,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 16:29:00,033 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 16:29:00,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Waiting until timeout for monitored process [2021-08-27 16:29:00,035 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-08-27 16:29:00,035 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-08-27 16:29:00,035 INFO L513 LassoAnalysis]: Proved termination. [2021-08-27 16:29:00,036 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_#in~n) = 1*fibo_#in~n Supporting invariants [] [2021-08-27 16:29:00,051 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Forceful destruction successful, exit code 0 [2021-08-27 16:29:00,053 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-08-27 16:29:00,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 16:29:00,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:29:00,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-27 16:29:00,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 16:29:00,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:29:00,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-27 16:29:00,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 16:29:00,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 16:29:00,160 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2021-08-27 16:29:00,165 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 16:29:00,218 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Forceful destruction successful, exit code 0 [2021-08-27 16:29:00,260 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3). Second operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 48 states and 60 transitions. Complement of second has 12 states. [2021-08-27 16:29:00,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2021-08-27 16:29:00,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 16:29:00,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 11 transitions. [2021-08-27 16:29:00,263 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 3 letters. Loop has 4 letters. [2021-08-27 16:29:00,264 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 16:29:00,264 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 7 letters. Loop has 4 letters. [2021-08-27 16:29:00,264 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 16:29:00,264 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 3 letters. Loop has 8 letters. [2021-08-27 16:29:00,265 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 16:29:00,265 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 48 states and 60 transitions. [2021-08-27 16:29:00,267 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-08-27 16:29:00,271 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 48 states to 25 states and 34 transitions. [2021-08-27 16:29:00,271 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 17 [2021-08-27 16:29:00,271 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 18 [2021-08-27 16:29:00,271 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 34 transitions. [2021-08-27 16:29:00,272 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-08-27 16:29:00,272 INFO L681 BuchiCegarLoop]: Abstraction has 25 states and 34 transitions. [2021-08-27 16:29:00,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states and 34 transitions. [2021-08-27 16:29:00,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 20. [2021-08-27 16:29:00,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-08-27 16:29:00,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 26 transitions. [2021-08-27 16:29:00,305 INFO L704 BuchiCegarLoop]: Abstraction has 20 states and 26 transitions. [2021-08-27 16:29:00,305 INFO L587 BuchiCegarLoop]: Abstraction has 20 states and 26 transitions. [2021-08-27 16:29:00,305 INFO L425 BuchiCegarLoop]: ======== Iteration 2============ [2021-08-27 16:29:00,306 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 20 states and 26 transitions. [2021-08-27 16:29:00,306 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-08-27 16:29:00,306 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-08-27 16:29:00,306 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-08-27 16:29:00,307 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 16:29:00,307 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 16:29:00,307 INFO L791 eck$LassoCheckResult]: Stem: 122#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(11);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 123#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 5; 128#L27 call main_#t~ret9 := fibo(main_~x~0);< 132#fiboENTRY ~n := #in~n; 133#L8 assume !(~n < 1); 138#L10 assume !(1 == ~n); 127#L13 call #t~ret7 := fibo(~n - 1);< 129#fiboENTRY ~n := #in~n; 134#L8 assume ~n < 1;#res := 0; 135#fiboFINAL assume true; 136#fiboEXIT >#33#return; 125#L13-1 [2021-08-27 16:29:00,307 INFO L793 eck$LassoCheckResult]: Loop: 125#L13-1 call #t~ret8 := fibo(~n - 2);< 126#fiboENTRY ~n := #in~n; 141#L8 assume !(~n < 1); 140#L10 assume !(1 == ~n); 124#L13 call #t~ret7 := fibo(~n - 1);< 126#fiboENTRY ~n := #in~n; 141#L8 assume ~n < 1;#res := 0; 131#fiboFINAL assume true; 139#fiboEXIT >#33#return; 125#L13-1 [2021-08-27 16:29:00,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 16:29:00,307 INFO L82 PathProgramCache]: Analyzing trace with hash -1181449843, now seen corresponding path program 1 times [2021-08-27 16:29:00,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 16:29:00,308 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324294659] [2021-08-27 16:29:00,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 16:29:00,308 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 16:29:00,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:29:00,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 16:29:00,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:29:00,360 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 16:29:00,361 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 16:29:00,361 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324294659] [2021-08-27 16:29:00,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324294659] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 16:29:00,361 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 16:29:00,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-27 16:29:00,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944885925] [2021-08-27 16:29:00,363 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-08-27 16:29:00,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 16:29:00,363 INFO L82 PathProgramCache]: Analyzing trace with hash 246097683, now seen corresponding path program 1 times [2021-08-27 16:29:00,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 16:29:00,364 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9375829] [2021-08-27 16:29:00,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 16:29:00,364 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 16:29:00,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:29:00,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-08-27 16:29:00,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:29:00,392 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 16:29:00,392 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 16:29:00,392 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9375829] [2021-08-27 16:29:00,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9375829] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 16:29:00,392 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 16:29:00,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-27 16:29:00,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739044491] [2021-08-27 16:29:00,393 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-08-27 16:29:00,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 16:29:00,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-27 16:29:00,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-08-27 16:29:00,395 INFO L87 Difference]: Start difference. First operand 20 states and 26 transitions. cyclomatic complexity: 8 Second operand has 6 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 16:29:00,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 16:29:00,447 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2021-08-27 16:29:00,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-27 16:29:00,448 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 26 states and 32 transitions. [2021-08-27 16:29:00,449 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-08-27 16:29:00,449 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 26 states to 24 states and 30 transitions. [2021-08-27 16:29:00,449 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 20 [2021-08-27 16:29:00,450 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 20 [2021-08-27 16:29:00,450 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 30 transitions. [2021-08-27 16:29:00,450 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-08-27 16:29:00,450 INFO L681 BuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2021-08-27 16:29:00,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states and 30 transitions. [2021-08-27 16:29:00,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-08-27 16:29:00,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 16 states have (on average 1.1875) internal successors, (19), 18 states have internal predecessors, (19), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2021-08-27 16:29:00,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2021-08-27 16:29:00,452 INFO L704 BuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2021-08-27 16:29:00,452 INFO L587 BuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2021-08-27 16:29:00,452 INFO L425 BuchiCegarLoop]: ======== Iteration 3============ [2021-08-27 16:29:00,452 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 24 states and 30 transitions. [2021-08-27 16:29:00,453 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-08-27 16:29:00,453 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-08-27 16:29:00,453 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-08-27 16:29:00,454 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 16:29:00,454 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1] [2021-08-27 16:29:00,454 INFO L791 eck$LassoCheckResult]: Stem: 195#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(11);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 196#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 5; 201#L27 call main_#t~ret9 := fibo(main_~x~0);< 205#fiboENTRY ~n := #in~n; 207#L8 assume !(~n < 1); 211#L10 assume !(1 == ~n); 200#L13 call #t~ret7 := fibo(~n - 1);< 202#fiboENTRY ~n := #in~n; 208#L8 assume !(~n < 1); 210#L10 assume 1 == ~n;#res := 1; 212#fiboFINAL assume true; 214#fiboEXIT >#33#return; 198#L13-1 [2021-08-27 16:29:00,454 INFO L793 eck$LassoCheckResult]: Loop: 198#L13-1 call #t~ret8 := fibo(~n - 2);< 199#fiboENTRY ~n := #in~n; 217#L8 assume !(~n < 1); 215#L10 assume !(1 == ~n); 197#L13 call #t~ret7 := fibo(~n - 1);< 199#fiboENTRY ~n := #in~n; 217#L8 assume !(~n < 1); 215#L10 assume 1 == ~n;#res := 1; 216#fiboFINAL assume true; 213#fiboEXIT >#33#return; 198#L13-1 [2021-08-27 16:29:00,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 16:29:00,454 INFO L82 PathProgramCache]: Analyzing trace with hash 2029785426, now seen corresponding path program 1 times [2021-08-27 16:29:00,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 16:29:00,454 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439098402] [2021-08-27 16:29:00,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 16:29:00,455 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 16:29:00,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:29:00,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 16:29:00,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:29:00,506 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 16:29:00,506 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 16:29:00,509 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439098402] [2021-08-27 16:29:00,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439098402] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 16:29:00,509 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696364717] [2021-08-27 16:29:00,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 16:29:00,509 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 16:29:00,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 16:29:00,513 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 16:29:00,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-27 16:29:00,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:29:00,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-27 16:29:00,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 16:29:00,608 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 16:29:00,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696364717] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 16:29:00,609 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 16:29:00,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-08-27 16:29:00,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463471854] [2021-08-27 16:29:00,609 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-08-27 16:29:00,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 16:29:00,610 INFO L82 PathProgramCache]: Analyzing trace with hash -960881524, now seen corresponding path program 1 times [2021-08-27 16:29:00,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 16:29:00,610 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685601046] [2021-08-27 16:29:00,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 16:29:00,610 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 16:29:00,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 16:29:00,613 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 16:29:00,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 16:29:00,619 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 16:29:00,734 INFO L210 LassoAnalysis]: Preferences: [2021-08-27 16:29:00,734 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-08-27 16:29:00,734 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-08-27 16:29:00,734 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-08-27 16:29:00,734 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-08-27 16:29:00,734 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 16:29:00,734 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-08-27 16:29:00,735 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-08-27 16:29:00,735 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-1.c_Iteration3_Loop [2021-08-27 16:29:00,735 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-08-27 16:29:00,735 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-08-27 16:29:00,736 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:29:00,737 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:29:00,747 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:29:00,750 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:29:00,779 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-08-27 16:29:00,779 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-08-27 16:29:00,780 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 16:29:00,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 16:29:00,781 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 16:29:00,796 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-27 16:29:00,796 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 16:29:00,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Waiting until timeout for monitored process [2021-08-27 16:29:00,813 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-08-27 16:29:00,813 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret8=0} Honda state: {fibo_#t~ret8=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-08-27 16:29:00,831 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Forceful destruction successful, exit code 0 [2021-08-27 16:29:00,831 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 16:29:00,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 16:29:00,832 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 16:29:00,839 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-27 16:29:00,839 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 16:29:00,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Waiting until timeout for monitored process [2021-08-27 16:29:00,862 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Forceful destruction successful, exit code 0 [2021-08-27 16:29:00,863 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 16:29:00,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 16:29:00,863 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 16:29:00,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Waiting until timeout for monitored process [2021-08-27 16:29:00,865 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-08-27 16:29:00,865 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 16:29:01,651 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-08-27 16:29:01,656 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Ended with exit code 0 [2021-08-27 16:29:01,656 INFO L210 LassoAnalysis]: Preferences: [2021-08-27 16:29:01,656 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-08-27 16:29:01,657 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-08-27 16:29:01,657 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-08-27 16:29:01,657 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-08-27 16:29:01,657 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 16:29:01,657 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-08-27 16:29:01,657 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-08-27 16:29:01,657 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-1.c_Iteration3_Loop [2021-08-27 16:29:01,657 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-08-27 16:29:01,657 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-08-27 16:29:01,658 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:29:01,667 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:29:01,673 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:29:01,676 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:29:01,717 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-08-27 16:29:01,718 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-08-27 16:29:01,718 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 16:29:01,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 16:29:01,719 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 16:29:01,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Waiting until timeout for monitored process [2021-08-27 16:29:01,722 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-08-27 16:29:01,728 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 16:29:01,728 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-08-27 16:29:01,729 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 16:29:01,729 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 16:29:01,729 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 16:29:01,729 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-08-27 16:29:01,729 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-08-27 16:29:01,730 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-08-27 16:29:01,747 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Forceful destruction successful, exit code 0 [2021-08-27 16:29:01,747 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 16:29:01,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 16:29:01,748 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 16:29:01,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Waiting until timeout for monitored process [2021-08-27 16:29:01,750 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-08-27 16:29:01,756 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 16:29:01,756 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-08-27 16:29:01,756 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 16:29:01,756 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 16:29:01,756 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 16:29:01,758 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-08-27 16:29:01,758 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-08-27 16:29:01,776 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-08-27 16:29:01,781 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-08-27 16:29:01,781 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-08-27 16:29:01,781 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 16:29:01,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 16:29:01,782 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 16:29:01,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Waiting until timeout for monitored process [2021-08-27 16:29:01,784 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-08-27 16:29:01,784 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-08-27 16:29:01,784 INFO L513 LassoAnalysis]: Proved termination. [2021-08-27 16:29:01,784 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2021-08-27 16:29:01,799 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Forceful destruction successful, exit code 0 [2021-08-27 16:29:01,799 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-08-27 16:29:01,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 16:29:01,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:29:01,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-27 16:29:01,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 16:29:01,979 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 [2021-08-27 16:29:01,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:29:01,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-27 16:29:01,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 16:29:02,089 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 16:29:02,090 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 6 loop predicates [2021-08-27 16:29:02,090 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 24 states and 30 transitions. cyclomatic complexity: 8 Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 16:29:02,253 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 24 states and 30 transitions. cyclomatic complexity: 8. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Result 135 states and 183 transitions. Complement of second has 36 states. [2021-08-27 16:29:02,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 9 states 2 stem states 6 non-accepting loop states 1 accepting loop states [2021-08-27 16:29:02,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 16:29:02,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 37 transitions. [2021-08-27 16:29:02,255 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 37 transitions. Stem has 12 letters. Loop has 10 letters. [2021-08-27 16:29:02,255 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 16:29:02,255 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 37 transitions. Stem has 22 letters. Loop has 10 letters. [2021-08-27 16:29:02,255 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 16:29:02,255 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 37 transitions. Stem has 12 letters. Loop has 20 letters. [2021-08-27 16:29:02,256 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 16:29:02,256 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 135 states and 183 transitions. [2021-08-27 16:29:02,259 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2021-08-27 16:29:02,262 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 135 states to 108 states and 152 transitions. [2021-08-27 16:29:02,262 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 64 [2021-08-27 16:29:02,262 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 69 [2021-08-27 16:29:02,262 INFO L73 IsDeterministic]: Start isDeterministic. Operand 108 states and 152 transitions. [2021-08-27 16:29:02,263 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-08-27 16:29:02,263 INFO L681 BuchiCegarLoop]: Abstraction has 108 states and 152 transitions. [2021-08-27 16:29:02,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states and 152 transitions. [2021-08-27 16:29:02,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 94. [2021-08-27 16:29:02,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 58 states have (on average 1.2241379310344827) internal successors, (71), 64 states have internal predecessors, (71), 21 states have call successors, (22), 11 states have call predecessors, (22), 15 states have return successors, (33), 18 states have call predecessors, (33), 19 states have call successors, (33) [2021-08-27 16:29:02,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 126 transitions. [2021-08-27 16:29:02,271 INFO L704 BuchiCegarLoop]: Abstraction has 94 states and 126 transitions. [2021-08-27 16:29:02,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 16:29:02,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-27 16:29:02,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-08-27 16:29:02,272 INFO L87 Difference]: Start difference. First operand 94 states and 126 transitions. Second operand has 8 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 16:29:02,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 16:29:02,327 INFO L93 Difference]: Finished difference Result 109 states and 147 transitions. [2021-08-27 16:29:02,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-27 16:29:02,332 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 109 states and 147 transitions. [2021-08-27 16:29:02,335 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2021-08-27 16:29:02,337 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 109 states to 106 states and 144 transitions. [2021-08-27 16:29:02,337 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 69 [2021-08-27 16:29:02,337 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 69 [2021-08-27 16:29:02,337 INFO L73 IsDeterministic]: Start isDeterministic. Operand 106 states and 144 transitions. [2021-08-27 16:29:02,337 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-08-27 16:29:02,337 INFO L681 BuchiCegarLoop]: Abstraction has 106 states and 144 transitions. [2021-08-27 16:29:02,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states and 144 transitions. [2021-08-27 16:29:02,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 94. [2021-08-27 16:29:02,343 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, (32), 18 states have call predecessors, (32), 19 states have call successors, (32) [2021-08-27 16:29:02,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 125 transitions. [2021-08-27 16:29:02,344 INFO L704 BuchiCegarLoop]: Abstraction has 94 states and 125 transitions. [2021-08-27 16:29:02,344 INFO L587 BuchiCegarLoop]: Abstraction has 94 states and 125 transitions. [2021-08-27 16:29:02,344 INFO L425 BuchiCegarLoop]: ======== Iteration 4============ [2021-08-27 16:29:02,344 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 94 states and 125 transitions. [2021-08-27 16:29:02,345 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2021-08-27 16:29:02,345 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-08-27 16:29:02,345 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-08-27 16:29:02,346 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [5, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 16:29:02,346 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [6, 5, 5, 3, 3, 3, 3, 2, 2, 2, 1] [2021-08-27 16:29:02,347 INFO L791 eck$LassoCheckResult]: Stem: 736#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(11);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 737#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 5; 743#L27 call main_#t~ret9 := fibo(main_~x~0);< 754#fiboENTRY ~n := #in~n; 798#L8 assume !(~n < 1); 778#L10 assume !(1 == ~n); 742#L13 call #t~ret7 := fibo(~n - 1);< 744#fiboENTRY ~n := #in~n; 759#L8 assume !(~n < 1); 775#L10 assume !(1 == ~n); 758#L13 call #t~ret7 := fibo(~n - 1);< 744#fiboENTRY ~n := #in~n; 759#L8 assume !(~n < 1); 775#L10 assume !(1 == ~n); 758#L13 call #t~ret7 := fibo(~n - 1);< 744#fiboENTRY ~n := #in~n; 760#L8 assume !(~n < 1); 797#L10 assume 1 == ~n;#res := 1; 796#fiboFINAL assume true; 795#fiboEXIT >#33#return; 756#L13-1 call #t~ret8 := fibo(~n - 2);< 755#fiboENTRY ~n := #in~n; 757#L8 assume ~n < 1;#res := 0; 774#fiboFINAL assume true; 825#fiboEXIT >#35#return; 821#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 819#fiboFINAL assume true; 817#fiboEXIT >#33#return; 739#L13-1 [2021-08-27 16:29:02,347 INFO L793 eck$LassoCheckResult]: Loop: 739#L13-1 call #t~ret8 := fibo(~n - 2);< 741#fiboENTRY ~n := #in~n; 799#L8 assume !(~n < 1); 776#L10 assume !(1 == ~n); 738#L13 call #t~ret7 := fibo(~n - 1);< 741#fiboENTRY ~n := #in~n; 799#L8 assume !(~n < 1); 776#L10 assume !(1 == ~n); 738#L13 call #t~ret7 := fibo(~n - 1);< 741#fiboENTRY ~n := #in~n; 799#L8 assume !(~n < 1); 776#L10 assume 1 == ~n;#res := 1; 777#fiboFINAL assume true; 815#fiboEXIT >#33#return; 739#L13-1 call #t~ret8 := fibo(~n - 2);< 741#fiboENTRY ~n := #in~n; 799#L8 assume !(~n < 1); 776#L10 assume !(1 == ~n); 738#L13 call #t~ret7 := fibo(~n - 1);< 741#fiboENTRY ~n := #in~n; 799#L8 assume !(~n < 1); 776#L10 assume 1 == ~n;#res := 1; 777#fiboFINAL assume true; 815#fiboEXIT >#33#return; 739#L13-1 call #t~ret8 := fibo(~n - 2);< 741#fiboENTRY ~n := #in~n; 799#L8 assume ~n < 1;#res := 0; 800#fiboFINAL assume true; 824#fiboEXIT >#35#return; 816#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 820#fiboFINAL assume true; 818#fiboEXIT >#35#return; 816#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 820#fiboFINAL assume true; 818#fiboEXIT >#33#return; 739#L13-1 [2021-08-27 16:29:02,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 16:29:02,347 INFO L82 PathProgramCache]: Analyzing trace with hash 1557778097, now seen corresponding path program 1 times [2021-08-27 16:29:02,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 16:29:02,347 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661946070] [2021-08-27 16:29:02,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 16:29:02,347 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 16:29:02,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:29:02,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-08-27 16:29:02,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:29:02,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-08-27 16:29:02,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:29:02,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-08-27 16:29:02,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:29:02,439 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-27 16:29:02,439 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 16:29:02,439 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661946070] [2021-08-27 16:29:02,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661946070] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 16:29:02,440 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914384679] [2021-08-27 16:29:02,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 16:29:02,440 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 16:29:02,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 16:29:02,441 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 16:29:02,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-08-27 16:29:02,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:29:02,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-27 16:29:02,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 16:29:02,584 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-27 16:29:02,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914384679] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 16:29:02,584 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 16:29:02,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-08-27 16:29:02,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862754310] [2021-08-27 16:29:02,585 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-08-27 16:29:02,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 16:29:02,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1616897917, now seen corresponding path program 1 times [2021-08-27 16:29:02,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 16:29:02,585 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937001684] [2021-08-27 16:29:02,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 16:29:02,585 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 16:29:02,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:29:02,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-08-27 16:29:02,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:29:02,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-08-27 16:29:02,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:29:02,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-08-27 16:29:02,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:29:02,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-08-27 16:29:02,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:29:02,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-08-27 16:29:02,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:29:02,676 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 26 proven. 13 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-08-27 16:29:02,677 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 16:29:02,677 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937001684] [2021-08-27 16:29:02,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937001684] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 16:29:02,677 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531963198] [2021-08-27 16:29:02,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 16:29:02,677 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 16:29:02,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 16:29:02,678 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 16:29:02,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-08-27 16:29:02,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:29:02,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-27 16:29:02,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 16:29:02,860 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 25 proven. 15 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-08-27 16:29:02,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531963198] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 16:29:02,861 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 16:29:02,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-08-27 16:29:02,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669770844] [2021-08-27 16:29:02,861 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-08-27 16:29:02,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 16:29:02,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-27 16:29:02,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-08-27 16:29:02,862 INFO L87 Difference]: Start difference. First operand 94 states and 125 transitions. cyclomatic complexity: 36 Second operand has 12 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2021-08-27 16:29:03,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 16:29:03,003 INFO L93 Difference]: Finished difference Result 116 states and 159 transitions. [2021-08-27 16:29:03,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-27 16:29:03,005 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 116 states and 159 transitions. [2021-08-27 16:29:03,007 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 15 [2021-08-27 16:29:03,008 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 116 states to 114 states and 157 transitions. [2021-08-27 16:29:03,008 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 77 [2021-08-27 16:29:03,009 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 77 [2021-08-27 16:29:03,009 INFO L73 IsDeterministic]: Start isDeterministic. Operand 114 states and 157 transitions. [2021-08-27 16:29:03,009 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-08-27 16:29:03,009 INFO L681 BuchiCegarLoop]: Abstraction has 114 states and 157 transitions. [2021-08-27 16:29:03,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states and 157 transitions. [2021-08-27 16:29:03,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2021-08-27 16:29:03,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 70 states have (on average 1.2142857142857142) internal successors, (85), 76 states have internal predecessors, (85), 26 states have call successors, (27), 13 states have call predecessors, (27), 18 states have return successors, (45), 24 states have call predecessors, (45), 24 states have call successors, (45) [2021-08-27 16:29:03,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 157 transitions. [2021-08-27 16:29:03,015 INFO L704 BuchiCegarLoop]: Abstraction has 114 states and 157 transitions. [2021-08-27 16:29:03,015 INFO L587 BuchiCegarLoop]: Abstraction has 114 states and 157 transitions. [2021-08-27 16:29:03,015 INFO L425 BuchiCegarLoop]: ======== Iteration 5============ [2021-08-27 16:29:03,015 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 114 states and 157 transitions. [2021-08-27 16:29:03,017 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 15 [2021-08-27 16:29:03,017 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-08-27 16:29:03,017 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-08-27 16:29:03,018 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [6, 5, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 16:29:03,018 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [8, 7, 6, 4, 4, 4, 4, 3, 3, 2, 2] [2021-08-27 16:29:03,018 INFO L791 eck$LassoCheckResult]: Stem: 1247#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(11);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 1248#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 5; 1265#L27 call main_#t~ret9 := fibo(main_~x~0);< 1266#fiboENTRY ~n := #in~n; 1312#L8 assume !(~n < 1); 1311#L10 assume !(1 == ~n); 1254#L13 call #t~ret7 := fibo(~n - 1);< 1273#fiboENTRY ~n := #in~n; 1274#L8 assume !(~n < 1); 1284#L10 assume !(1 == ~n); 1253#L13 call #t~ret7 := fibo(~n - 1);< 1255#fiboENTRY ~n := #in~n; 1309#L8 assume !(~n < 1); 1307#L10 assume !(1 == ~n); 1257#L13 call #t~ret7 := fibo(~n - 1);< 1255#fiboENTRY ~n := #in~n; 1309#L8 assume !(~n < 1); 1307#L10 assume !(1 == ~n); 1257#L13 call #t~ret7 := fibo(~n - 1);< 1255#fiboENTRY ~n := #in~n; 1310#L8 assume !(~n < 1); 1308#L10 assume 1 == ~n;#res := 1; 1306#fiboFINAL assume true; 1305#fiboEXIT >#33#return; 1280#L13-1 call #t~ret8 := fibo(~n - 2);< 1304#fiboENTRY ~n := #in~n; 1282#L8 assume ~n < 1;#res := 0; 1283#fiboFINAL assume true; 1279#fiboEXIT >#35#return; 1256#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 1258#fiboFINAL assume true; 1275#fiboEXIT >#33#return; 1269#L13-1 [2021-08-27 16:29:03,018 INFO L793 eck$LassoCheckResult]: Loop: 1269#L13-1 call #t~ret8 := fibo(~n - 2);< 1267#fiboENTRY ~n := #in~n; 1272#L8 assume !(~n < 1); 1346#L10 assume !(1 == ~n); 1268#L13 call #t~ret7 := fibo(~n - 1);< 1267#fiboENTRY ~n := #in~n; 1272#L8 assume !(~n < 1); 1346#L10 assume !(1 == ~n); 1268#L13 call #t~ret7 := fibo(~n - 1);< 1267#fiboENTRY ~n := #in~n; 1272#L8 assume !(~n < 1); 1346#L10 assume !(1 == ~n); 1268#L13 call #t~ret7 := fibo(~n - 1);< 1267#fiboENTRY ~n := #in~n; 1272#L8 assume !(~n < 1); 1346#L10 assume 1 == ~n;#res := 1; 1286#fiboFINAL assume true; 1337#fiboEXIT >#33#return; 1251#L13-1 call #t~ret8 := fibo(~n - 2);< 1252#fiboENTRY ~n := #in~n; 1313#L8 assume ~n < 1;#res := 0; 1314#fiboFINAL assume true; 1349#fiboEXIT >#35#return; 1340#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 1347#fiboFINAL assume true; 1343#fiboEXIT >#33#return; 1269#L13-1 call #t~ret8 := fibo(~n - 2);< 1267#fiboENTRY ~n := #in~n; 1272#L8 assume !(~n < 1); 1346#L10 assume !(1 == ~n); 1268#L13 call #t~ret7 := fibo(~n - 1);< 1267#fiboENTRY ~n := #in~n; 1272#L8 assume !(~n < 1); 1346#L10 assume 1 == ~n;#res := 1; 1286#fiboFINAL assume true; 1337#fiboEXIT >#33#return; 1251#L13-1 call #t~ret8 := fibo(~n - 2);< 1252#fiboENTRY ~n := #in~n; 1313#L8 assume ~n < 1;#res := 0; 1314#fiboFINAL assume true; 1349#fiboEXIT >#35#return; 1340#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 1347#fiboFINAL assume true; 1343#fiboEXIT >#35#return; 1338#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 1345#fiboFINAL assume true; 1341#fiboEXIT >#33#return; 1269#L13-1 [2021-08-27 16:29:03,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 16:29:03,019 INFO L82 PathProgramCache]: Analyzing trace with hash -1730264506, now seen corresponding path program 2 times [2021-08-27 16:29:03,019 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 16:29:03,019 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207539709] [2021-08-27 16:29:03,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 16:29:03,019 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 16:29:03,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 16:29:03,027 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 16:29:03,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 16:29:03,044 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 16:29:03,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 16:29:03,045 INFO L82 PathProgramCache]: Analyzing trace with hash 564146419, now seen corresponding path program 2 times [2021-08-27 16:29:03,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 16:29:03,045 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034327097] [2021-08-27 16:29:03,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 16:29:03,045 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 16:29:03,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:29:03,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-08-27 16:29:03,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:29:03,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-08-27 16:29:03,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:29:03,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-08-27 16:29:03,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:29:03,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-08-27 16:29:03,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:29:03,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-08-27 16:29:03,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:29:03,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-08-27 16:29:03,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:29:03,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-08-27 16:29:03,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:29:03,170 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 45 proven. 31 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-08-27 16:29:03,171 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 16:29:03,171 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034327097] [2021-08-27 16:29:03,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034327097] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 16:29:03,171 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840576290] [2021-08-27 16:29:03,171 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-27 16:29:03,171 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 16:29:03,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 16:29:03,177 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 16:29:03,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-08-27 16:29:03,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-27 16:29:03,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 16:29:03,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-27 16:29:03,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 16:29:03,417 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 49 proven. 38 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-08-27 16:29:03,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840576290] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 16:29:03,418 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 16:29:03,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-08-27 16:29:03,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448702125] [2021-08-27 16:29:03,418 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-08-27 16:29:03,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 16:29:03,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-27 16:29:03,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-08-27 16:29:03,419 INFO L87 Difference]: Start difference. First operand 114 states and 157 transitions. cyclomatic complexity: 49 Second operand has 13 states, 10 states have (on average 2.9) internal successors, (29), 11 states have internal predecessors, (29), 9 states have call successors, (11), 1 states have call predecessors, (11), 6 states have return successors, (11), 6 states have call predecessors, (11), 9 states have call successors, (11) [2021-08-27 16:29:03,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 16:29:03,529 INFO L93 Difference]: Finished difference Result 65 states and 84 transitions. [2021-08-27 16:29:03,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-27 16:29:03,530 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 65 states and 84 transitions. [2021-08-27 16:29:03,531 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2021-08-27 16:29:03,536 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 65 states to 59 states and 77 transitions. [2021-08-27 16:29:03,536 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 48 [2021-08-27 16:29:03,537 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 48 [2021-08-27 16:29:03,537 INFO L73 IsDeterministic]: Start isDeterministic. Operand 59 states and 77 transitions. [2021-08-27 16:29:03,538 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-08-27 16:29:03,538 INFO L681 BuchiCegarLoop]: Abstraction has 59 states and 77 transitions. [2021-08-27 16:29:03,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states and 77 transitions. [2021-08-27 16:29:03,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 56. [2021-08-27 16:29:03,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 37 states have internal predecessors, (41), 11 states have call successors, (11), 8 states have call predecessors, (11), 8 states have return successors, (18), 10 states have call predecessors, (18), 9 states have call successors, (18) [2021-08-27 16:29:03,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 70 transitions. [2021-08-27 16:29:03,549 INFO L704 BuchiCegarLoop]: Abstraction has 56 states and 70 transitions. [2021-08-27 16:29:03,549 INFO L587 BuchiCegarLoop]: Abstraction has 56 states and 70 transitions. [2021-08-27 16:29:03,549 INFO L425 BuchiCegarLoop]: ======== Iteration 6============ [2021-08-27 16:29:03,549 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 56 states and 70 transitions. [2021-08-27 16:29:03,549 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2021-08-27 16:29:03,549 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-08-27 16:29:03,549 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-08-27 16:29:03,550 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [8, 6, 5, 5, 5, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2021-08-27 16:29:03,550 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [6, 5, 4, 3, 3, 3, 3, 2, 2, 2, 1] [2021-08-27 16:29:03,550 INFO L791 eck$LassoCheckResult]: Stem: 1684#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(11);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 1685#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 5; 1697#L27 call main_#t~ret9 := fibo(main_~x~0);< 1698#fiboENTRY ~n := #in~n; 1725#L8 assume !(~n < 1); 1723#L10 assume !(1 == ~n); 1692#L13 call #t~ret7 := fibo(~n - 1);< 1702#fiboENTRY ~n := #in~n; 1703#L8 assume !(~n < 1); 1709#L10 assume !(1 == ~n); 1691#L13 call #t~ret7 := fibo(~n - 1);< 1693#fiboENTRY ~n := #in~n; 1719#L8 assume !(~n < 1); 1724#L10 assume !(1 == ~n); 1695#L13 call #t~ret7 := fibo(~n - 1);< 1693#fiboENTRY ~n := #in~n; 1719#L8 assume !(~n < 1); 1724#L10 assume !(1 == ~n); 1695#L13 call #t~ret7 := fibo(~n - 1);< 1693#fiboENTRY ~n := #in~n; 1719#L8 assume !(~n < 1); 1724#L10 assume !(1 == ~n); 1695#L13 call #t~ret7 := fibo(~n - 1);< 1693#fiboENTRY ~n := #in~n; 1715#L8 assume !(~n < 1); 1716#L10 assume 1 == ~n;#res := 1; 1735#fiboFINAL assume true; 1734#fiboEXIT >#33#return; 1700#L13-1 call #t~ret8 := fibo(~n - 2);< 1699#fiboENTRY ~n := #in~n; 1701#L8 assume ~n < 1;#res := 0; 1708#fiboFINAL assume true; 1733#fiboEXIT >#35#return; 1731#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 1728#fiboFINAL assume true; 1722#fiboEXIT >#33#return; 1706#L13-1 call #t~ret8 := fibo(~n - 2);< 1717#fiboENTRY ~n := #in~n; 1718#L8 assume ~n < 1;#res := 0; 1732#fiboFINAL assume true; 1729#fiboEXIT >#35#return; 1694#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 1696#fiboFINAL assume true; 1704#fiboEXIT >#33#return; 1688#L13-1 [2021-08-27 16:29:03,550 INFO L793 eck$LassoCheckResult]: Loop: 1688#L13-1 call #t~ret8 := fibo(~n - 2);< 1712#fiboENTRY ~n := #in~n; 1736#L8 assume !(~n < 1); 1713#L10 assume !(1 == ~n); 1686#L13 call #t~ret7 := fibo(~n - 1);< 1690#fiboENTRY ~n := #in~n; 1714#L8 assume !(~n < 1); 1713#L10 assume !(1 == ~n); 1686#L13 call #t~ret7 := fibo(~n - 1);< 1690#fiboENTRY ~n := #in~n; 1714#L8 assume !(~n < 1); 1713#L10 assume !(1 == ~n); 1686#L13 call #t~ret7 := fibo(~n - 1);< 1690#fiboENTRY ~n := #in~n; 1714#L8 assume !(~n < 1); 1713#L10 assume 1 == ~n;#res := 1; 1711#fiboFINAL assume true; 1705#fiboEXIT >#33#return; 1707#L13-1 call #t~ret8 := fibo(~n - 2);< 1730#fiboENTRY ~n := #in~n; 1737#L8 assume ~n < 1;#res := 0; 1732#fiboFINAL assume true; 1729#fiboEXIT >#35#return; 1727#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 1726#fiboFINAL assume true; 1720#fiboEXIT >#33#return; 1706#L13-1 call #t~ret8 := fibo(~n - 2);< 1717#fiboENTRY ~n := #in~n; 1718#L8 assume ~n < 1;#res := 0; 1732#fiboFINAL assume true; 1729#fiboEXIT >#35#return; 1694#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 1696#fiboFINAL assume true; 1704#fiboEXIT >#33#return; 1688#L13-1 [2021-08-27 16:29:03,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 16:29:03,551 INFO L82 PathProgramCache]: Analyzing trace with hash -2124338928, now seen corresponding path program 3 times [2021-08-27 16:29:03,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 16:29:03,551 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493976759] [2021-08-27 16:29:03,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 16:29:03,551 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 16:29:03,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:29:03,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-08-27 16:29:03,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:29:03,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-08-27 16:29:03,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:29:03,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-08-27 16:29:03,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:29:03,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-08-27 16:29:03,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:29:03,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-08-27 16:29:03,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:29:03,732 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 35 proven. 51 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-08-27 16:29:03,732 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 16:29:03,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493976759] [2021-08-27 16:29:03,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493976759] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 16:29:03,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546011053] [2021-08-27 16:29:03,733 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-27 16:29:03,733 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 16:29:03,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 16:29:03,734 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 16:29:03,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-08-27 16:29:03,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-27 16:29:03,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 16:29:03,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-27 16:29:03,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 16:29:03,991 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 40 proven. 11 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-08-27 16:29:03,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546011053] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 16:29:03,991 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 16:29:03,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8] total 18 [2021-08-27 16:29:03,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769820844] [2021-08-27 16:29:03,992 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-08-27 16:29:03,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 16:29:03,992 INFO L82 PathProgramCache]: Analyzing trace with hash -176759904, now seen corresponding path program 3 times [2021-08-27 16:29:03,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 16:29:03,992 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667207631] [2021-08-27 16:29:03,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 16:29:03,993 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 16:29:03,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:29:04,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-08-27 16:29:04,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:29:04,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-08-27 16:29:04,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:29:04,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-08-27 16:29:04,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:29:04,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-08-27 16:29:04,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:29:04,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-08-27 16:29:04,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:29:04,056 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 29 proven. 6 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-08-27 16:29:04,056 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 16:29:04,056 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667207631] [2021-08-27 16:29:04,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667207631] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 16:29:04,056 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971719046] [2021-08-27 16:29:04,057 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-27 16:29:04,057 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 16:29:04,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 16:29:04,060 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 16:29:04,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-08-27 16:29:04,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-27 16:29:04,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 16:29:04,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-27 16:29:04,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 16:29:04,293 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 30 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-08-27 16:29:04,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971719046] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 16:29:04,294 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 16:29:04,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-27 16:29:04,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539559402] [2021-08-27 16:29:04,294 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-08-27 16:29:04,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 16:29:04,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-27 16:29:04,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-08-27 16:29:04,295 INFO L87 Difference]: Start difference. First operand 56 states and 70 transitions. cyclomatic complexity: 16 Second operand has 11 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 10 states have internal predecessors, (23), 5 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (7), 4 states have call predecessors, (7), 5 states have call successors, (7) [2021-08-27 16:29:04,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 16:29:04,372 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions. [2021-08-27 16:29:04,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-27 16:29:04,373 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 56 states and 66 transitions. [2021-08-27 16:29:04,375 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2021-08-27 16:29:04,380 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 56 states to 56 states and 66 transitions. [2021-08-27 16:29:04,380 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 45 [2021-08-27 16:29:04,381 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 45 [2021-08-27 16:29:04,381 INFO L73 IsDeterministic]: Start isDeterministic. Operand 56 states and 66 transitions. [2021-08-27 16:29:04,381 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-08-27 16:29:04,381 INFO L681 BuchiCegarLoop]: Abstraction has 56 states and 66 transitions. [2021-08-27 16:29:04,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states and 66 transitions. [2021-08-27 16:29:04,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 54. [2021-08-27 16:29:04,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 36 states have internal predecessors, (37), 11 states have call successors, (11), 7 states have call predecessors, (11), 8 states have return successors, (16), 10 states have call predecessors, (16), 9 states have call successors, (16) [2021-08-27 16:29:04,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2021-08-27 16:29:04,383 INFO L704 BuchiCegarLoop]: Abstraction has 54 states and 64 transitions. [2021-08-27 16:29:04,383 INFO L587 BuchiCegarLoop]: Abstraction has 54 states and 64 transitions. [2021-08-27 16:29:04,383 INFO L425 BuchiCegarLoop]: ======== Iteration 7============ [2021-08-27 16:29:04,383 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 54 states and 64 transitions. [2021-08-27 16:29:04,383 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2021-08-27 16:29:04,384 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-08-27 16:29:04,384 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-08-27 16:29:04,390 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [8, 7, 5, 5, 5, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2021-08-27 16:29:04,390 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [6, 5, 5, 3, 3, 3, 3, 2, 2, 2, 1] [2021-08-27 16:29:04,391 INFO L791 eck$LassoCheckResult]: Stem: 2177#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(11);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 2178#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 5; 2190#L27 call main_#t~ret9 := fibo(main_~x~0);< 2191#fiboENTRY ~n := #in~n; 2214#L8 assume !(~n < 1); 2212#L10 assume !(1 == ~n); 2185#L13 call #t~ret7 := fibo(~n - 1);< 2195#fiboENTRY ~n := #in~n; 2196#L8 assume !(~n < 1); 2200#L10 assume !(1 == ~n); 2184#L13 call #t~ret7 := fibo(~n - 1);< 2186#fiboENTRY ~n := #in~n; 2209#L8 assume !(~n < 1); 2213#L10 assume !(1 == ~n); 2188#L13 call #t~ret7 := fibo(~n - 1);< 2186#fiboENTRY ~n := #in~n; 2209#L8 assume !(~n < 1); 2213#L10 assume !(1 == ~n); 2188#L13 call #t~ret7 := fibo(~n - 1);< 2186#fiboENTRY ~n := #in~n; 2209#L8 assume !(~n < 1); 2213#L10 assume !(1 == ~n); 2188#L13 call #t~ret7 := fibo(~n - 1);< 2186#fiboENTRY ~n := #in~n; 2208#L8 assume !(~n < 1); 2227#L10 assume 1 == ~n;#res := 1; 2226#fiboFINAL assume true; 2225#fiboEXIT >#33#return; 2193#L13-1 call #t~ret8 := fibo(~n - 2);< 2192#fiboENTRY ~n := #in~n; 2194#L8 assume ~n < 1;#res := 0; 2199#fiboFINAL assume true; 2223#fiboEXIT >#35#return; 2221#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 2217#fiboFINAL assume true; 2211#fiboEXIT >#33#return; 2202#L13-1 call #t~ret8 := fibo(~n - 2);< 2207#fiboENTRY ~n := #in~n; 2206#L8 assume !(~n < 1); 2201#L10 assume 1 == ~n;#res := 1; 2203#fiboFINAL assume true; 2230#fiboEXIT >#35#return; 2187#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 2189#fiboFINAL assume true; 2197#fiboEXIT >#33#return; 2181#L13-1 [2021-08-27 16:29:04,391 INFO L793 eck$LassoCheckResult]: Loop: 2181#L13-1 call #t~ret8 := fibo(~n - 2);< 2183#fiboENTRY ~n := #in~n; 2205#L8 assume !(~n < 1); 2204#L10 assume !(1 == ~n); 2179#L13 call #t~ret7 := fibo(~n - 1);< 2183#fiboENTRY ~n := #in~n; 2205#L8 assume !(~n < 1); 2204#L10 assume !(1 == ~n); 2179#L13 call #t~ret7 := fibo(~n - 1);< 2183#fiboENTRY ~n := #in~n; 2205#L8 assume !(~n < 1); 2204#L10 assume !(1 == ~n); 2179#L13 call #t~ret7 := fibo(~n - 1);< 2183#fiboENTRY ~n := #in~n; 2205#L8 assume !(~n < 1); 2204#L10 assume 1 == ~n;#res := 1; 2203#fiboFINAL assume true; 2230#fiboEXIT >#33#return; 2219#L13-1 call #t~ret8 := fibo(~n - 2);< 2220#fiboENTRY ~n := #in~n; 2224#L8 assume ~n < 1;#res := 0; 2222#fiboFINAL assume true; 2218#fiboEXIT >#35#return; 2216#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 2215#fiboFINAL assume true; 2210#fiboEXIT >#33#return; 2202#L13-1 call #t~ret8 := fibo(~n - 2);< 2207#fiboENTRY ~n := #in~n; 2206#L8 assume !(~n < 1); 2201#L10 assume 1 == ~n;#res := 1; 2203#fiboFINAL assume true; 2230#fiboEXIT >#35#return; 2187#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 2189#fiboFINAL assume true; 2197#fiboEXIT >#33#return; 2181#L13-1 [2021-08-27 16:29:04,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 16:29:04,391 INFO L82 PathProgramCache]: Analyzing trace with hash -690973043, now seen corresponding path program 4 times [2021-08-27 16:29:04,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 16:29:04,391 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956031151] [2021-08-27 16:29:04,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 16:29:04,391 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 16:29:04,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:29:04,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-08-27 16:29:04,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:29:04,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-08-27 16:29:04,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:29:04,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-08-27 16:29:04,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:29:04,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-08-27 16:29:04,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:29:04,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-08-27 16:29:04,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:29:04,539 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 28 proven. 60 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-08-27 16:29:04,540 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 16:29:04,540 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956031151] [2021-08-27 16:29:04,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956031151] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 16:29:04,540 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571617896] [2021-08-27 16:29:04,540 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-27 16:29:04,540 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 16:29:04,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 16:29:04,545 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 16:29:04,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-08-27 16:29:04,678 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-27 16:29:04,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 16:29:04,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-27 16:29:04,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 16:29:04,841 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 26 proven. 65 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-08-27 16:29:04,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571617896] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 16:29:04,841 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 16:29:04,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 16 [2021-08-27 16:29:04,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052355503] [2021-08-27 16:29:04,842 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-08-27 16:29:04,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 16:29:04,842 INFO L82 PathProgramCache]: Analyzing trace with hash -445565443, now seen corresponding path program 4 times [2021-08-27 16:29:04,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 16:29:04,843 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543686526] [2021-08-27 16:29:04,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 16:29:04,843 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 16:29:04,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 16:29:04,847 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 16:29:04,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 16:29:04,851 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 16:29:05,270 INFO L210 LassoAnalysis]: Preferences: [2021-08-27 16:29:05,270 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-08-27 16:29:05,270 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-08-27 16:29:05,270 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-08-27 16:29:05,270 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-08-27 16:29:05,270 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 16:29:05,270 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-08-27 16:29:05,270 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-08-27 16:29:05,270 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-1.c_Iteration7_Loop [2021-08-27 16:29:05,271 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-08-27 16:29:05,271 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-08-27 16:29:05,271 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:29:05,280 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:29:05,282 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:29:05,283 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:29:05,341 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-08-27 16:29:05,341 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-08-27 16:29:05,341 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 16:29:05,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 16:29:05,342 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 16:29:05,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Waiting until timeout for monitored process [2021-08-27 16:29:05,344 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-27 16:29:05,344 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 16:29:05,372 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Forceful destruction successful, exit code 0 [2021-08-27 16:29:05,372 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 16:29:05,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 16:29:05,373 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 16:29:05,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Waiting until timeout for monitored process [2021-08-27 16:29:05,376 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-08-27 16:29:05,376 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 16:29:05,871 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-08-27 16:29:05,875 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Ended with exit code 0 [2021-08-27 16:29:05,875 INFO L210 LassoAnalysis]: Preferences: [2021-08-27 16:29:05,875 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-08-27 16:29:05,876 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-08-27 16:29:05,876 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-08-27 16:29:05,876 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-08-27 16:29:05,876 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 16:29:05,876 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-08-27 16:29:05,877 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-08-27 16:29:05,877 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-1.c_Iteration7_Loop [2021-08-27 16:29:05,877 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-08-27 16:29:05,877 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-08-27 16:29:05,877 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:29:05,889 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:29:05,891 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:29:05,895 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:29:05,943 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-08-27 16:29:05,943 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-08-27 16:29:05,943 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 16:29:05,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 16:29:05,944 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 16:29:05,956 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-08-27 16:29:05,964 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 16:29:05,964 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-08-27 16:29:05,964 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 16:29:05,964 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 16:29:05,964 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 16:29:05,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Waiting until timeout for monitored process [2021-08-27 16:29:05,967 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-08-27 16:29:05,967 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-08-27 16:29:05,982 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-08-27 16:29:05,985 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2021-08-27 16:29:05,985 INFO L444 ModelExtractionUtils]: 2 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. [2021-08-27 16:29:05,985 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 16:29:05,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 16:29:05,986 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 16:29:05,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Waiting until timeout for monitored process [2021-08-27 16:29:05,988 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-08-27 16:29:05,988 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-08-27 16:29:05,988 INFO L513 LassoAnalysis]: Proved termination. [2021-08-27 16:29:05,988 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2021-08-27 16:29:06,006 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Forceful destruction successful, exit code 0 [2021-08-27 16:29:06,007 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-08-27 16:29:06,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 16:29:06,038 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 [2021-08-27 16:29:06,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:29:06,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-27 16:29:06,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 16:29:06,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:29:06,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-27 16:29:06,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 16:29:06,836 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 14 proven. 35 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-08-27 16:29:06,837 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 8 loop predicates [2021-08-27 16:29:06,837 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 54 states and 64 transitions. cyclomatic complexity: 12 Second operand has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 7 states have call successors, (10), 4 states have call predecessors, (10), 5 states have return successors, (8), 4 states have call predecessors, (8), 6 states have call successors, (8) [2021-08-27 16:29:06,930 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 54 states and 64 transitions. cyclomatic complexity: 12. Second operand has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 7 states have call successors, (10), 4 states have call predecessors, (10), 5 states have return successors, (8), 4 states have call predecessors, (8), 6 states have call successors, (8) Result 61 states and 71 transitions. Complement of second has 11 states. [2021-08-27 16:29:06,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2021-08-27 16:29:06,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 7 states have call successors, (10), 4 states have call predecessors, (10), 5 states have return successors, (8), 4 states have call predecessors, (8), 6 states have call successors, (8) [2021-08-27 16:29:06,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 17 transitions. [2021-08-27 16:29:06,931 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 17 transitions. Stem has 45 letters. Loop has 35 letters. [2021-08-27 16:29:06,932 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 16:29:06,932 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-08-27 16:29:06,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 16:29:07,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:29:07,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-27 16:29:07,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 16:29:07,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:29:07,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-27 16:29:07,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 16:29:07,728 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 14 proven. 35 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-08-27 16:29:07,730 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 8 loop predicates [2021-08-27 16:29:07,730 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 54 states and 64 transitions. cyclomatic complexity: 12 Second operand has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 7 states have call successors, (10), 4 states have call predecessors, (10), 5 states have return successors, (8), 4 states have call predecessors, (8), 6 states have call successors, (8) [2021-08-27 16:29:07,809 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 54 states and 64 transitions. cyclomatic complexity: 12. Second operand has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 7 states have call successors, (10), 4 states have call predecessors, (10), 5 states have return successors, (8), 4 states have call predecessors, (8), 6 states have call successors, (8) Result 61 states and 71 transitions. Complement of second has 11 states. [2021-08-27 16:29:07,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2021-08-27 16:29:07,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 7 states have call successors, (10), 4 states have call predecessors, (10), 5 states have return successors, (8), 4 states have call predecessors, (8), 6 states have call successors, (8) [2021-08-27 16:29:07,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 17 transitions. [2021-08-27 16:29:07,810 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 17 transitions. Stem has 45 letters. Loop has 35 letters. [2021-08-27 16:29:07,810 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 16:29:07,810 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-08-27 16:29:07,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 16:29:07,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:29:07,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-27 16:29:07,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 16:29:08,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:29:08,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-27 16:29:08,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 16:29:08,602 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 14 proven. 35 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-08-27 16:29:08,603 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 8 loop predicates [2021-08-27 16:29:08,604 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 54 states and 64 transitions. cyclomatic complexity: 12 Second operand has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 7 states have call successors, (10), 4 states have call predecessors, (10), 5 states have return successors, (8), 4 states have call predecessors, (8), 6 states have call successors, (8) [2021-08-27 16:29:08,904 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 54 states and 64 transitions. cyclomatic complexity: 12. Second operand has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 7 states have call successors, (10), 4 states have call predecessors, (10), 5 states have return successors, (8), 4 states have call predecessors, (8), 6 states have call successors, (8) Result 353 states and 439 transitions. Complement of second has 142 states. [2021-08-27 16:29:08,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 11 states 2 stem states 8 non-accepting loop states 1 accepting loop states [2021-08-27 16:29:08,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 7 states have call successors, (10), 4 states have call predecessors, (10), 5 states have return successors, (8), 4 states have call predecessors, (8), 6 states have call successors, (8) [2021-08-27 16:29:08,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 52 transitions. [2021-08-27 16:29:08,905 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 52 transitions. Stem has 45 letters. Loop has 35 letters. [2021-08-27 16:29:08,910 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 16:29:08,910 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 52 transitions. Stem has 80 letters. Loop has 35 letters. [2021-08-27 16:29:08,910 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 16:29:08,910 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 52 transitions. Stem has 45 letters. Loop has 70 letters. [2021-08-27 16:29:08,913 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 16:29:08,913 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 353 states and 439 transitions. [2021-08-27 16:29:08,917 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2021-08-27 16:29:08,923 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 353 states to 221 states and 281 transitions. [2021-08-27 16:29:08,923 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 78 [2021-08-27 16:29:08,924 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 105 [2021-08-27 16:29:08,924 INFO L73 IsDeterministic]: Start isDeterministic. Operand 221 states and 281 transitions. [2021-08-27 16:29:08,925 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-08-27 16:29:08,925 INFO L681 BuchiCegarLoop]: Abstraction has 221 states and 281 transitions. [2021-08-27 16:29:08,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states and 281 transitions. [2021-08-27 16:29:08,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 213. [2021-08-27 16:29:08,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 134 states have (on average 1.1044776119402986) internal successors, (148), 140 states have internal predecessors, (148), 43 states have call successors, (43), 28 states have call predecessors, (43), 36 states have return successors, (68), 44 states have call predecessors, (68), 40 states have call successors, (68) [2021-08-27 16:29:08,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 259 transitions. [2021-08-27 16:29:08,944 INFO L704 BuchiCegarLoop]: Abstraction has 213 states and 259 transitions. [2021-08-27 16:29:08,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 16:29:08,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-27 16:29:08,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-08-27 16:29:08,945 INFO L87 Difference]: Start difference. First operand 213 states and 259 transitions. Second operand has 17 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 10 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (9), 5 states have call predecessors, (9), 7 states have call successors, (9) [2021-08-27 16:29:09,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 16:29:09,187 INFO L93 Difference]: Finished difference Result 124 states and 131 transitions. [2021-08-27 16:29:09,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-27 16:29:09,187 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 124 states and 131 transitions. [2021-08-27 16:29:09,188 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2021-08-27 16:29:09,188 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 124 states to 63 states and 66 transitions. [2021-08-27 16:29:09,189 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 49 [2021-08-27 16:29:09,189 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 52 [2021-08-27 16:29:09,189 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 66 transitions. [2021-08-27 16:29:09,189 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-08-27 16:29:09,189 INFO L681 BuchiCegarLoop]: Abstraction has 63 states and 66 transitions. [2021-08-27 16:29:09,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states and 66 transitions. [2021-08-27 16:29:09,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2021-08-27 16:29:09,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 43 states have internal predecessors, (45), 11 states have call successors, (11), 9 states have call predecessors, (11), 9 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2021-08-27 16:29:09,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 65 transitions. [2021-08-27 16:29:09,191 INFO L704 BuchiCegarLoop]: Abstraction has 62 states and 65 transitions. [2021-08-27 16:29:09,191 INFO L587 BuchiCegarLoop]: Abstraction has 62 states and 65 transitions. [2021-08-27 16:29:09,191 INFO L425 BuchiCegarLoop]: ======== Iteration 8============ [2021-08-27 16:29:09,191 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 62 states and 65 transitions. [2021-08-27 16:29:09,191 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2021-08-27 16:29:09,191 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-08-27 16:29:09,191 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-08-27 16:29:09,192 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [9, 8, 6, 5, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1] [2021-08-27 16:29:09,192 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2021-08-27 16:29:09,192 INFO L791 eck$LassoCheckResult]: Stem: 4227#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(11);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 4228#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 5; 4239#L27 call main_#t~ret9 := fibo(main_~x~0);< 4240#fiboENTRY ~n := #in~n; 4255#L8 assume !(~n < 1); 4261#L10 assume !(1 == ~n); 4233#L13 call #t~ret7 := fibo(~n - 1);< 4242#fiboENTRY ~n := #in~n; 4243#L8 assume !(~n < 1); 4251#L10 assume !(1 == ~n); 4232#L13 call #t~ret7 := fibo(~n - 1);< 4234#fiboENTRY ~n := #in~n; 4258#L8 assume !(~n < 1); 4263#L10 assume !(1 == ~n); 4257#L13 call #t~ret7 := fibo(~n - 1);< 4234#fiboENTRY ~n := #in~n; 4258#L8 assume !(~n < 1); 4263#L10 assume !(1 == ~n); 4257#L13 call #t~ret7 := fibo(~n - 1);< 4234#fiboENTRY ~n := #in~n; 4259#L8 assume !(~n < 1); 4272#L10 assume 1 == ~n;#res := 1; 4270#fiboFINAL assume true; 4269#fiboEXIT >#33#return; 4267#L13-1 call #t~ret8 := fibo(~n - 2);< 4268#fiboENTRY ~n := #in~n; 4273#L8 assume ~n < 1;#res := 0; 4271#fiboFINAL assume true; 4266#fiboEXIT >#35#return; 4265#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 4264#fiboFINAL assume true; 4262#fiboEXIT >#33#return; 4245#L13-1 call #t~ret8 := fibo(~n - 2);< 4260#fiboENTRY ~n := #in~n; 4256#L8 assume !(~n < 1); 4252#L10 assume 1 == ~n;#res := 1; 4244#fiboFINAL assume true; 4246#fiboEXIT >#35#return; 4286#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 4284#fiboFINAL assume true; 4282#fiboEXIT >#33#return; 4236#L13-1 call #t~ret8 := fibo(~n - 2);< 4253#fiboENTRY ~n := #in~n; 4281#L8 assume !(~n < 1); 4280#L10 assume !(1 == ~n); 4231#L13 call #t~ret7 := fibo(~n - 1);< 4276#fiboENTRY ~n := #in~n; 4279#L8 assume !(~n < 1); 4278#L10 assume !(1 == ~n); 4229#L13 [2021-08-27 16:29:09,192 INFO L793 eck$LassoCheckResult]: Loop: 4229#L13 call #t~ret7 := fibo(~n - 1);< 4230#fiboENTRY ~n := #in~n; 4241#L8 assume !(~n < 1); 4254#L10 assume !(1 == ~n); 4229#L13 [2021-08-27 16:29:09,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 16:29:09,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1327795734, now seen corresponding path program 5 times [2021-08-27 16:29:09,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 16:29:09,193 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080152341] [2021-08-27 16:29:09,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 16:29:09,193 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 16:29:09,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:29:09,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-08-27 16:29:09,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:29:09,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-08-27 16:29:09,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:29:09,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-08-27 16:29:09,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:29:09,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-08-27 16:29:09,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:29:09,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-08-27 16:29:09,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:29:09,273 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 53 proven. 32 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-08-27 16:29:09,273 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 16:29:09,273 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080152341] [2021-08-27 16:29:09,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080152341] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 16:29:09,273 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124428852] [2021-08-27 16:29:09,273 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-27 16:29:09,273 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 16:29:09,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 16:29:09,274 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 16:29:09,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-08-27 16:29:09,662 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-27 16:29:09,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 16:29:09,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-27 16:29:09,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 16:29:09,856 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 58 proven. 35 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-08-27 16:29:09,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124428852] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 16:29:09,857 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 16:29:09,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 14 [2021-08-27 16:29:09,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502852073] [2021-08-27 16:29:09,857 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-08-27 16:29:09,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 16:29:09,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1893846, now seen corresponding path program 2 times [2021-08-27 16:29:09,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 16:29:09,858 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143027706] [2021-08-27 16:29:09,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 16:29:09,858 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 16:29:09,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 16:29:09,862 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 16:29:09,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 16:29:09,863 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 16:29:09,905 INFO L210 LassoAnalysis]: Preferences: [2021-08-27 16:29:09,905 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-08-27 16:29:09,905 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-08-27 16:29:09,905 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-08-27 16:29:09,905 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-08-27 16:29:09,905 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 16:29:09,905 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-08-27 16:29:09,905 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-08-27 16:29:09,906 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-1.c_Iteration8_Loop [2021-08-27 16:29:09,906 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-08-27 16:29:09,906 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-08-27 16:29:09,906 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:29:09,912 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:29:09,914 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:29:09,915 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:29:09,955 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-08-27 16:29:09,955 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-08-27 16:29:09,956 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 16:29:09,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 16:29:09,957 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 16:29:09,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (32)] Waiting until timeout for monitored process [2021-08-27 16:29:09,960 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-08-27 16:29:09,960 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 16:29:09,988 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (32)] Forceful destruction successful, exit code 0 [2021-08-27 16:29:09,989 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 16:29:09,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 16:29:09,989 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 16:29:09,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (33)] Waiting until timeout for monitored process [2021-08-27 16:29:09,991 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-08-27 16:29:09,991 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-08-27 16:29:11,658 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-08-27 16:29:11,662 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (33)] Ended with exit code 0 [2021-08-27 16:29:11,663 INFO L210 LassoAnalysis]: Preferences: [2021-08-27 16:29:11,663 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-08-27 16:29:11,663 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-08-27 16:29:11,663 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-08-27 16:29:11,663 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-08-27 16:29:11,663 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 16:29:11,663 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-08-27 16:29:11,663 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-08-27 16:29:11,663 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-1.c_Iteration8_Loop [2021-08-27 16:29:11,663 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-08-27 16:29:11,663 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-08-27 16:29:11,663 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:29:11,671 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:29:11,672 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:29:11,674 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-08-27 16:29:11,710 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-08-27 16:29:11,710 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-08-27 16:29:11,710 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 16:29:11,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 16:29:11,711 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 16:29:11,715 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-08-27 16:29:11,717 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (34)] Waiting until timeout for monitored process [2021-08-27 16:29:11,722 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-08-27 16:29:11,722 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-08-27 16:29:11,722 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-08-27 16:29:11,722 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-08-27 16:29:11,722 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-08-27 16:29:11,723 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-08-27 16:29:11,723 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-08-27 16:29:11,724 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-08-27 16:29:11,726 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-08-27 16:29:11,726 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-08-27 16:29:11,726 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-08-27 16:29:11,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 16:29:11,727 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-08-27 16:29:11,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (35)] Waiting until timeout for monitored process [2021-08-27 16:29:11,729 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-08-27 16:29:11,729 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-08-27 16:29:11,729 INFO L513 LassoAnalysis]: Proved termination. [2021-08-27 16:29:11,729 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2021-08-27 16:29:11,744 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (34)] Ended with exit code 0 [2021-08-27 16:29:11,744 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-08-27 16:29:11,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 16:29:11,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:29:11,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-27 16:29:11,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 16:29:11,921 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (35)] Forceful destruction successful, exit code 0 [2021-08-27 16:29:12,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:29:12,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-27 16:29:12,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 16:29:12,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 16:29:12,367 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 4 loop predicates [2021-08-27 16:29:12,367 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 62 states and 65 transitions. cyclomatic complexity: 5 Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-08-27 16:29:12,412 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 62 states and 65 transitions. cyclomatic complexity: 5. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Result 71 states and 75 transitions. Complement of second has 18 states. [2021-08-27 16:29:12,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2021-08-27 16:29:12,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-08-27 16:29:12,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 13 transitions. [2021-08-27 16:29:12,413 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 13 transitions. Stem has 49 letters. Loop has 4 letters. [2021-08-27 16:29:12,413 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 16:29:12,413 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-08-27 16:29:12,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 16:29:12,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:29:12,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-27 16:29:12,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 16:29:12,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:29:12,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-27 16:29:12,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 16:29:13,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 16:29:13,018 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 4 loop predicates [2021-08-27 16:29:13,018 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 62 states and 65 transitions. cyclomatic complexity: 5 Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-08-27 16:29:13,091 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 62 states and 65 transitions. cyclomatic complexity: 5. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Result 77 states and 81 transitions. Complement of second has 17 states. [2021-08-27 16:29:13,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2021-08-27 16:29:13,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-08-27 16:29:13,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 16 transitions. [2021-08-27 16:29:13,095 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 49 letters. Loop has 4 letters. [2021-08-27 16:29:13,095 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 16:29:13,095 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-08-27 16:29:13,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 16:29:13,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:29:13,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-27 16:29:13,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 16:29:13,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 16:29:13,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-27 16:29:13,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 16:29:13,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 16:29:13,716 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 4 loop predicates [2021-08-27 16:29:13,716 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 62 states and 65 transitions. cyclomatic complexity: 5 Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-08-27 16:29:13,783 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 62 states and 65 transitions. cyclomatic complexity: 5. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Result 86 states and 93 transitions. Complement of second has 27 states. [2021-08-27 16:29:13,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2021-08-27 16:29:13,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-08-27 16:29:13,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 22 transitions. [2021-08-27 16:29:13,784 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 49 letters. Loop has 4 letters. [2021-08-27 16:29:13,785 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 16:29:13,785 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 53 letters. Loop has 4 letters. [2021-08-27 16:29:13,786 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 16:29:13,787 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 49 letters. Loop has 8 letters. [2021-08-27 16:29:13,787 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-08-27 16:29:13,787 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 86 states and 93 transitions. [2021-08-27 16:29:13,788 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-08-27 16:29:13,788 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 86 states to 0 states and 0 transitions. [2021-08-27 16:29:13,788 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2021-08-27 16:29:13,788 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2021-08-27 16:29:13,788 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2021-08-27 16:29:13,788 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-27 16:29:13,788 INFO L681 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-27 16:29:13,788 INFO L704 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-27 16:29:13,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 16:29:13,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-27 16:29:13,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-08-27 16:29:13,789 INFO L87 Difference]: Start difference. First operand 0 states and 0 transitions. Second operand has 15 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 7 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2021-08-27 16:29:13,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 16:29:13,789 INFO L93 Difference]: Finished difference Result 0 states and 0 transitions. [2021-08-27 16:29:13,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-27 16:29:13,790 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 0 states and 0 transitions. [2021-08-27 16:29:13,790 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-08-27 16:29:13,790 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 0 states to 0 states and 0 transitions. [2021-08-27 16:29:13,790 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2021-08-27 16:29:13,790 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2021-08-27 16:29:13,790 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2021-08-27 16:29:13,791 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-27 16:29:13,791 INFO L681 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-27 16:29:13,791 INFO L704 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-27 16:29:13,791 INFO L587 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-27 16:29:13,791 INFO L425 BuchiCegarLoop]: ======== Iteration 9============ [2021-08-27 16:29:13,791 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2021-08-27 16:29:13,791 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-08-27 16:29:13,791 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2021-08-27 16:29:13,796 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 27.08 04:29:13 BoogieIcfgContainer [2021-08-27 16:29:13,796 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2021-08-27 16:29:13,796 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-27 16:29:13,796 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-27 16:29:13,797 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-27 16:29:13,797 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 04:28:58" (3/4) ... [2021-08-27 16:29:13,800 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-08-27 16:29:13,800 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-27 16:29:13,801 INFO L168 Benchmark]: Toolchain (without parser) took 15218.74 ms. Allocated memory was 58.7 MB in the beginning and 264.2 MB in the end (delta: 205.5 MB). Free memory was 36.8 MB in the beginning and 97.5 MB in the end (delta: -60.7 MB). Peak memory consumption was 143.7 MB. Max. memory is 16.1 GB. [2021-08-27 16:29:13,801 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 58.7 MB. Free memory was 40.1 MB in the beginning and 40.0 MB in the end (delta: 29.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 16:29:13,802 INFO L168 Benchmark]: CACSL2BoogieTranslator took 113.31 ms. Allocated memory is still 58.7 MB. Free memory was 36.5 MB in the beginning and 27.5 MB in the end (delta: 9.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-08-27 16:29:13,802 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.95 ms. Allocated memory is still 58.7 MB. Free memory was 27.5 MB in the beginning and 41.9 MB in the end (delta: -14.4 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-08-27 16:29:13,802 INFO L168 Benchmark]: Boogie Preprocessor took 16.38 ms. Allocated memory is still 58.7 MB. Free memory was 41.9 MB in the beginning and 41.0 MB in the end (delta: 898.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 16:29:13,802 INFO L168 Benchmark]: RCFGBuilder took 205.19 ms. Allocated memory is still 58.7 MB. Free memory was 41.0 MB in the beginning and 29.1 MB in the end (delta: 11.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-08-27 16:29:13,803 INFO L168 Benchmark]: BuchiAutomizer took 14831.46 ms. Allocated memory was 58.7 MB in the beginning and 264.2 MB in the end (delta: 205.5 MB). Free memory was 28.9 MB in the beginning and 97.5 MB in the end (delta: -68.6 MB). Peak memory consumption was 138.7 MB. Max. memory is 16.1 GB. [2021-08-27 16:29:13,803 INFO L168 Benchmark]: Witness Printer took 3.47 ms. Allocated memory is still 264.2 MB. Free memory is still 97.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 16:29:13,804 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 58.7 MB. Free memory was 40.1 MB in the beginning and 40.0 MB in the end (delta: 29.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 113.31 ms. Allocated memory is still 58.7 MB. Free memory was 36.5 MB in the beginning and 27.5 MB in the end (delta: 9.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 43.95 ms. Allocated memory is still 58.7 MB. Free memory was 27.5 MB in the beginning and 41.9 MB in the end (delta: -14.4 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 16.38 ms. Allocated memory is still 58.7 MB. Free memory was 41.9 MB in the beginning and 41.0 MB in the end (delta: 898.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 205.19 ms. Allocated memory is still 58.7 MB. Free memory was 41.0 MB in the beginning and 29.1 MB in the end (delta: 11.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * BuchiAutomizer took 14831.46 ms. Allocated memory was 58.7 MB in the beginning and 264.2 MB in the end (delta: 205.5 MB). Free memory was 28.9 MB in the beginning and 97.5 MB in the end (delta: -68.6 MB). Peak memory consumption was 138.7 MB. Max. memory is 16.1 GB. * Witness Printer took 3.47 ms. Allocated memory is still 264.2 MB. Free memory is still 97.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 11 terminating modules (7 trivial, 2 deterministic, 2 nondeterministic). One deterministic module has affine ranking function \old(n) and consists of 4 locations. One deterministic module has affine ranking function n and consists of 9 locations. One nondeterministic module has affine ranking function n and consists of 11 locations. One nondeterministic module has affine ranking function n and consists of 6 locations. 7 modules have a trivial ranking function, the largest among these consists of 17 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 14.7s and 9 iterations. TraceHistogramMax:9. Analysis of lassos took 8.2s. Construction of modules took 0.6s. Büchi inclusion checks took 5.6s. Highest rank in rank-based complementation 3. Minimization of det autom 2. Minimization of nondet autom 9. Automata minimization 65.1ms AutomataMinimizationTime, 9 MinimizatonAttempts, 45 StatesRemovedByMinimization, 7 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 114 states and ocurred in iteration 4. Nontrivial modules had stage [2, 0, 2, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 32/70 HoareTripleCheckerStatistics: 178 SDtfs, 374 SDslu, 262 SDs, 0 SdLazy, 857 SolverSat, 256 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 606.5ms Time LassoAnalysisResults: nont0 unkn0 SFLI1 SFLT1 conc0 concLT0 SILN0 SILU0 SILI3 SILT3 lasso0 LassoPreprocessingBenchmarks: Lassos: inital18 mio100 ax100 hnf96 lsp92 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq182 hnf93 smp80 dnf100 smp100 tf109 neg96 sie108 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 40ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 5 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 4 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 3.3s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! [2021-08-27 16:29:13,833 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-08-27 16:29:14,045 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-08-27 16:29:14,245 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-08-27 16:29:14,445 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-08-27 16:29:14,645 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-08-27 16:29:14,845 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-08-27 16:29:15,045 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-08-27 16:29:15,246 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-08-27 16:29:15,449 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...