./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/recursive-simple/fibo_2calls_8-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerTermination.xml -i ../sv-benchmarks/c/recursive-simple/fibo_2calls_8-1.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 50f60fa428d099767eedeaaecff58f84e68d960030ff43c7eae2dbdfbde6f992 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-19 19:14:01,339 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-19 19:14:01,341 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-19 19:14:01,394 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-19 19:14:01,395 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-19 19:14:01,397 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-19 19:14:01,398 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-19 19:14:01,402 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-19 19:14:01,403 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-19 19:14:01,406 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-19 19:14:01,407 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-19 19:14:01,408 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-19 19:14:01,408 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-19 19:14:01,410 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-19 19:14:01,411 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-19 19:14:01,414 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-19 19:14:01,415 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-19 19:14:01,415 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-19 19:14:01,417 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-19 19:14:01,420 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-19 19:14:01,422 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-19 19:14:01,424 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-19 19:14:01,424 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-19 19:14:01,425 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-19 19:14:01,428 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-19 19:14:01,429 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-19 19:14:01,430 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-19 19:14:01,431 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-19 19:14:01,431 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-19 19:14:01,432 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-19 19:14:01,432 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-19 19:14:01,433 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-19 19:14:01,433 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-19 19:14:01,434 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-19 19:14:01,436 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-19 19:14:01,436 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-19 19:14:01,437 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-19 19:14:01,437 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-19 19:14:01,437 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-19 19:14:01,437 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-19 19:14:01,438 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-19 19:14:01,439 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-32bit-Automizer_Default.epf [2021-12-19 19:14:01,462 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-19 19:14:01,462 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-19 19:14:01,463 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-19 19:14:01,463 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-19 19:14:01,464 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-19 19:14:01,464 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-19 19:14:01,464 INFO L138 SettingsManager]: * Use SBE=true [2021-12-19 19:14:01,464 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2021-12-19 19:14:01,464 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2021-12-19 19:14:01,465 INFO L138 SettingsManager]: * Use old map elimination=false [2021-12-19 19:14:01,465 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2021-12-19 19:14:01,465 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2021-12-19 19:14:01,466 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2021-12-19 19:14:01,466 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-19 19:14:01,466 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-19 19:14:01,466 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-19 19:14:01,466 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-19 19:14:01,466 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-19 19:14:01,466 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-19 19:14:01,467 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2021-12-19 19:14:01,467 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2021-12-19 19:14:01,467 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2021-12-19 19:14:01,467 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-19 19:14:01,467 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-19 19:14:01,468 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2021-12-19 19:14:01,469 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-19 19:14:01,469 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2021-12-19 19:14:01,469 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-19 19:14:01,469 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-19 19:14:01,469 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-19 19:14:01,469 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-19 19:14:01,470 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-19 19:14:01,470 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-12-19 19:14:01,470 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 50f60fa428d099767eedeaaecff58f84e68d960030ff43c7eae2dbdfbde6f992 [2021-12-19 19:14:01,654 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-19 19:14:01,675 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-19 19:14:01,690 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-19 19:14:01,691 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-19 19:14:01,691 INFO L275 PluginConnector]: CDTParser initialized [2021-12-19 19:14:01,692 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/fibo_2calls_8-1.c [2021-12-19 19:14:01,763 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed6cac33c/ecf91eb52d4340268912f4eef6870b2d/FLAGe5bf9024e [2021-12-19 19:14:02,114 INFO L306 CDTParser]: Found 1 translation units. [2021-12-19 19:14:02,114 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_2calls_8-1.c [2021-12-19 19:14:02,118 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed6cac33c/ecf91eb52d4340268912f4eef6870b2d/FLAGe5bf9024e [2021-12-19 19:14:02,126 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed6cac33c/ecf91eb52d4340268912f4eef6870b2d [2021-12-19 19:14:02,128 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-19 19:14:02,129 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-19 19:14:02,134 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-19 19:14:02,134 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-19 19:14:02,136 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-19 19:14:02,137 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.12 07:14:02" (1/1) ... [2021-12-19 19:14:02,137 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60709565 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 07:14:02, skipping insertion in model container [2021-12-19 19:14:02,137 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.12 07:14:02" (1/1) ... [2021-12-19 19:14:02,142 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-19 19:14:02,157 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-19 19:14:02,260 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_2calls_8-1.c[947,960] [2021-12-19 19:14:02,261 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-19 19:14:02,266 INFO L203 MainTranslator]: Completed pre-run [2021-12-19 19:14:02,275 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_2calls_8-1.c[947,960] [2021-12-19 19:14:02,275 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-19 19:14:02,283 INFO L208 MainTranslator]: Completed translation [2021-12-19 19:14:02,283 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 07:14:02 WrapperNode [2021-12-19 19:14:02,283 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-19 19:14:02,284 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-19 19:14:02,284 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-19 19:14:02,284 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-19 19:14:02,289 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 07:14:02" (1/1) ... [2021-12-19 19:14:02,292 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 07:14:02" (1/1) ... [2021-12-19 19:14:02,301 INFO L137 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 20 [2021-12-19 19:14:02,301 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-19 19:14:02,301 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-19 19:14:02,301 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-19 19:14:02,302 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-19 19:14:02,306 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 07:14:02" (1/1) ... [2021-12-19 19:14:02,306 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 07:14:02" (1/1) ... [2021-12-19 19:14:02,307 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 07:14:02" (1/1) ... [2021-12-19 19:14:02,307 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 07:14:02" (1/1) ... [2021-12-19 19:14:02,308 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 07:14:02" (1/1) ... [2021-12-19 19:14:02,309 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 07:14:02" (1/1) ... [2021-12-19 19:14:02,310 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 07:14:02" (1/1) ... [2021-12-19 19:14:02,311 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-19 19:14:02,311 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-19 19:14:02,311 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-19 19:14:02,311 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-19 19:14:02,312 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 07:14:02" (1/1) ... [2021-12-19 19:14:02,316 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 19:14:02,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 19:14:02,331 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-19 19:14:02,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2021-12-19 19:14:02,359 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-19 19:14:02,359 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-19 19:14:02,359 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2021-12-19 19:14:02,360 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2021-12-19 19:14:02,360 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2021-12-19 19:14:02,360 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2021-12-19 19:14:02,360 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-19 19:14:02,360 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-19 19:14:02,397 INFO L236 CfgBuilder]: Building ICFG [2021-12-19 19:14:02,398 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-19 19:14:02,459 INFO L277 CfgBuilder]: Performing block encoding [2021-12-19 19:14:02,463 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-19 19:14:02,464 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-19 19:14:02,465 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.12 07:14:02 BoogieIcfgContainer [2021-12-19 19:14:02,465 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-19 19:14:02,466 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2021-12-19 19:14:02,466 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2021-12-19 19:14:02,468 INFO L275 PluginConnector]: BuchiAutomizer initialized [2021-12-19 19:14:02,468 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-12-19 19:14:02,469 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 19.12 07:14:02" (1/3) ... [2021-12-19 19:14:02,469 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@5ad2711d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 19.12 07:14:02, skipping insertion in model container [2021-12-19 19:14:02,469 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-12-19 19:14:02,469 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 07:14:02" (2/3) ... [2021-12-19 19:14:02,469 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@5ad2711d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 19.12 07:14:02, skipping insertion in model container [2021-12-19 19:14:02,470 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-12-19 19:14:02,470 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.12 07:14:02" (3/3) ... [2021-12-19 19:14:02,470 INFO L388 chiAutomizerObserver]: Analyzing ICFG fibo_2calls_8-1.c [2021-12-19 19:14:02,511 INFO L359 BuchiCegarLoop]: Interprodecural is true [2021-12-19 19:14:02,511 INFO L360 BuchiCegarLoop]: Hoare is false [2021-12-19 19:14:02,511 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2021-12-19 19:14:02,511 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2021-12-19 19:14:02,511 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-12-19 19:14:02,511 INFO L364 BuchiCegarLoop]: Difference is false [2021-12-19 19:14:02,511 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-12-19 19:14:02,511 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2021-12-19 19:14:02,535 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 26 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-19 19:14:02,556 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2021-12-19 19:14:02,556 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-19 19:14:02,556 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-19 19:14:02,563 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2021-12-19 19:14:02,563 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-19 19:14:02,563 INFO L425 BuchiCegarLoop]: ======== Iteration 1============ [2021-12-19 19:14:02,563 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 26 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-19 19:14:02,565 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2021-12-19 19:14:02,565 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-19 19:14:02,565 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-19 19:14:02,565 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2021-12-19 19:14:02,565 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-19 19:14:02,569 INFO L791 eck$LassoCheckResult]: Stem: 16#ULTIMATE.startENTRYtrue assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(18, 2);call #Ultimate.allocInit(12, 3); 7#L-1true assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~ret8#1, main_~x~0#1, main_~result~0#1;main_~x~0#1 := 8; 15#L39true call main_#t~ret8#1 := fibo1(main_~x~0#1);< 5#fibo1ENTRYtrue [2021-12-19 19:14:02,569 INFO L793 eck$LassoCheckResult]: Loop: 5#fibo1ENTRYtrue ~n := #in~n; 9#L10true assume !(~n < 1); 8#L12true assume !(1 == ~n); 10#L15true call #t~ret4 := fibo2(~n - 1);< 14#fibo2ENTRYtrue ~n := #in~n; 12#L20true assume !(~n < 1); 17#L22true assume !(1 == ~n); 23#L25true call #t~ret6 := fibo1(~n - 1);< 5#fibo1ENTRYtrue [2021-12-19 19:14:02,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 19:14:02,573 INFO L85 PathProgramCache]: Analyzing trace with hash 29896, now seen corresponding path program 1 times [2021-12-19 19:14:02,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 19:14:02,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753026034] [2021-12-19 19:14:02,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 19:14:02,580 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 19:14:02,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-19 19:14:02,630 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-19 19:14:02,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-19 19:14:02,644 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-19 19:14:02,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 19:14:02,646 INFO L85 PathProgramCache]: Analyzing trace with hash 181289832, now seen corresponding path program 1 times [2021-12-19 19:14:02,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 19:14:02,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471313470] [2021-12-19 19:14:02,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 19:14:02,647 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 19:14:02,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-19 19:14:02,653 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-19 19:14:02,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-19 19:14:02,658 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-19 19:14:02,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 19:14:02,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1313669423, now seen corresponding path program 1 times [2021-12-19 19:14:02,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 19:14:02,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038749550] [2021-12-19 19:14:02,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 19:14:02,659 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 19:14:02,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-19 19:14:02,668 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-19 19:14:02,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-19 19:14:02,677 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-19 19:14:02,839 INFO L210 LassoAnalysis]: Preferences: [2021-12-19 19:14:02,839 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-19 19:14:02,840 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-19 19:14:02,840 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-19 19:14:02,840 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-12-19 19:14:02,840 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 19:14:02,841 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-19 19:14:02,841 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-19 19:14:02,841 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_8-1.c_Iteration1_Loop [2021-12-19 19:14:02,841 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-19 19:14:02,841 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-19 19:14:02,850 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:02,854 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:02,856 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:02,858 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:02,861 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:02,863 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:02,865 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:02,866 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:02,868 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:02,869 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:02,937 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-19 19:14:02,938 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-12-19 19:14:02,939 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 19:14:02,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 19:14:02,940 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-19 19:14:02,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Waiting until timeout for monitored process [2021-12-19 19:14:02,947 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-19 19:14:02,947 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-19 19:14:02,975 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-19 19:14:02,976 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#res=0} Honda state: {fibo2_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-12-19 19:14:02,992 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Forceful destruction successful, exit code 0 [2021-12-19 19:14:02,992 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 19:14:02,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 19:14:02,994 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-19 19:14:03,000 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-19 19:14:03,000 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-19 19:14:03,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Waiting until timeout for monitored process [2021-12-19 19:14:03,013 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-19 19:14:03,013 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#res=0} Honda state: {fibo1_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-12-19 19:14:03,030 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Ended with exit code 0 [2021-12-19 19:14:03,030 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 19:14:03,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 19:14:03,031 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-19 19:14:03,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Waiting until timeout for monitored process [2021-12-19 19:14:03,034 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-19 19:14:03,034 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-19 19:14:03,041 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-19 19:14:03,041 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#in~n=0} Honda state: {fibo2_#in~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-12-19 19:14:03,057 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Forceful destruction successful, exit code 0 [2021-12-19 19:14:03,057 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 19:14:03,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 19:14:03,058 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-19 19:14:03,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Waiting until timeout for monitored process [2021-12-19 19:14:03,060 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-19 19:14:03,060 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-19 19:14:03,067 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-19 19:14:03,067 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_~n=0} Honda state: {fibo2_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-12-19 19:14:03,081 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Forceful destruction successful, exit code 0 [2021-12-19 19:14:03,082 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 19:14:03,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 19:14:03,082 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-19 19:14:03,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Waiting until timeout for monitored process [2021-12-19 19:14:03,085 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-19 19:14:03,085 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-19 19:14:03,101 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-19 19:14:03,101 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#t~ret4=0} Honda state: {fibo1_#t~ret4=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-12-19 19:14:03,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Forceful destruction successful, exit code 0 [2021-12-19 19:14:03,120 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 19:14:03,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 19:14:03,121 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-19 19:14:03,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Waiting until timeout for monitored process [2021-12-19 19:14:03,140 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-19 19:14:03,140 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-19 19:14:03,151 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-19 19:14:03,152 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#t~ret6=0} Honda state: {fibo2_#t~ret6=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-12-19 19:14:03,169 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Forceful destruction successful, exit code 0 [2021-12-19 19:14:03,171 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 19:14:03,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 19:14:03,172 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-19 19:14:03,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Waiting until timeout for monitored process [2021-12-19 19:14:03,175 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-19 19:14:03,175 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-19 19:14:03,181 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-19 19:14:03,181 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_~n=0} Honda state: {fibo1_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-12-19 19:14:03,198 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 [2021-12-19 19:14:03,198 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 19:14:03,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 19:14:03,203 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-19 19:14:03,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Waiting until timeout for monitored process [2021-12-19 19:14:03,225 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-19 19:14:03,225 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-19 19:14:03,232 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-19 19:14:03,232 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#t~ret5=0} Honda state: {fibo1_#t~ret5=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-12-19 19:14:03,249 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Forceful destruction successful, exit code 0 [2021-12-19 19:14:03,250 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 19:14:03,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 19:14:03,251 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-19 19:14:03,257 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-19 19:14:03,257 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-19 19:14:03,266 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Waiting until timeout for monitored process [2021-12-19 19:14:03,275 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-19 19:14:03,275 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#t~ret7=0} Honda state: {fibo2_#t~ret7=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-12-19 19:14:03,290 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Forceful destruction successful, exit code 0 [2021-12-19 19:14:03,290 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 19:14:03,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 19:14:03,291 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-19 19:14:03,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Waiting until timeout for monitored process [2021-12-19 19:14:03,294 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-19 19:14:03,294 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-19 19:14:03,322 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Forceful destruction successful, exit code 0 [2021-12-19 19:14:03,322 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 19:14:03,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 19:14:03,323 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) [2021-12-19 19:14:03,323 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 [2021-12-19 19:14:03,324 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-12-19 19:14:03,325 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-19 19:14:03,375 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-12-19 19:14:03,378 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Ended with exit code 0 [2021-12-19 19:14:03,378 INFO L210 LassoAnalysis]: Preferences: [2021-12-19 19:14:03,378 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-19 19:14:03,378 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-19 19:14:03,378 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-19 19:14:03,378 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-12-19 19:14:03,378 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 19:14:03,378 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-19 19:14:03,378 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-19 19:14:03,378 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_8-1.c_Iteration1_Loop [2021-12-19 19:14:03,378 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-19 19:14:03,378 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-19 19:14:03,380 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:03,384 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:03,386 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:03,399 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:03,401 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:03,403 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:03,404 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:03,406 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:03,411 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:03,412 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:03,454 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-19 19:14:03,457 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-12-19 19:14:03,458 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 19:14:03,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 19:14:03,459 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-19 19:14:03,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Waiting until timeout for monitored process [2021-12-19 19:14:03,464 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-12-19 19:14:03,470 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-19 19:14:03,470 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-19 19:14:03,471 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-19 19:14:03,471 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-19 19:14:03,471 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-19 19:14:03,472 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-19 19:14:03,472 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-19 19:14:03,473 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-19 19:14:03,490 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 [2021-12-19 19:14:03,490 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 19:14:03,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 19:14:03,491 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-19 19:14:03,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Waiting until timeout for monitored process [2021-12-19 19:14:03,493 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-12-19 19:14:03,499 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-19 19:14:03,499 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-19 19:14:03,499 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-19 19:14:03,499 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-19 19:14:03,499 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-19 19:14:03,502 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-19 19:14:03,502 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-19 19:14:03,531 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-19 19:14:03,545 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Forceful destruction successful, exit code 0 [2021-12-19 19:14:03,546 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 19:14:03,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 19:14:03,548 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-19 19:14:03,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Waiting until timeout for monitored process [2021-12-19 19:14:03,549 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-12-19 19:14:03,563 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-19 19:14:03,563 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-19 19:14:03,563 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-19 19:14:03,563 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-19 19:14:03,563 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-19 19:14:03,564 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-19 19:14:03,564 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-19 19:14:03,575 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-19 19:14:03,590 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Forceful destruction successful, exit code 0 [2021-12-19 19:14:03,590 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 19:14:03,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 19:14:03,591 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-19 19:14:03,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Waiting until timeout for monitored process [2021-12-19 19:14:03,593 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-12-19 19:14:03,599 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-19 19:14:03,599 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-19 19:14:03,599 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-19 19:14:03,599 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-19 19:14:03,599 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-19 19:14:03,600 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-19 19:14:03,600 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-19 19:14:03,601 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-19 19:14:03,615 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Forceful destruction successful, exit code 0 [2021-12-19 19:14:03,616 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 19:14:03,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 19:14:03,616 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-19 19:14:03,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Waiting until timeout for monitored process [2021-12-19 19:14:03,619 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-12-19 19:14:03,625 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-19 19:14:03,625 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-19 19:14:03,625 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-19 19:14:03,626 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-19 19:14:03,626 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-19 19:14:03,626 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-19 19:14:03,626 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-19 19:14:03,627 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-19 19:14:03,641 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Forceful destruction successful, exit code 0 [2021-12-19 19:14:03,642 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 19:14:03,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 19:14:03,643 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-19 19:14:03,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Waiting until timeout for monitored process [2021-12-19 19:14:03,645 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-12-19 19:14:03,651 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-19 19:14:03,651 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-19 19:14:03,651 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-19 19:14:03,651 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-19 19:14:03,651 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-19 19:14:03,651 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-19 19:14:03,651 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-19 19:14:03,660 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-19 19:14:03,675 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Forceful destruction successful, exit code 0 [2021-12-19 19:14:03,675 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 19:14:03,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 19:14:03,676 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-19 19:14:03,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Waiting until timeout for monitored process [2021-12-19 19:14:03,684 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-12-19 19:14:03,690 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-19 19:14:03,690 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-19 19:14:03,690 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-19 19:14:03,690 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-19 19:14:03,690 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-19 19:14:03,691 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-19 19:14:03,691 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-19 19:14:03,700 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-19 19:14:03,715 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Forceful destruction successful, exit code 0 [2021-12-19 19:14:03,715 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 19:14:03,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 19:14:03,716 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-19 19:14:03,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Waiting until timeout for monitored process [2021-12-19 19:14:03,719 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-12-19 19:14:03,725 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-19 19:14:03,725 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-19 19:14:03,725 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-19 19:14:03,725 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-19 19:14:03,725 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-19 19:14:03,726 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-19 19:14:03,726 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-19 19:14:03,739 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-12-19 19:14:03,752 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-12-19 19:14:03,752 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-12-19 19:14:03,753 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 19:14:03,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 19:14:03,754 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-19 19:14:03,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Waiting until timeout for monitored process [2021-12-19 19:14:03,756 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-12-19 19:14:03,756 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-12-19 19:14:03,756 INFO L513 LassoAnalysis]: Proved termination. [2021-12-19 19:14:03,757 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo1_#in~n) = 1*fibo1_#in~n Supporting invariants [] [2021-12-19 19:14:03,774 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 [2021-12-19 19:14:03,776 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-12-19 19:14:03,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 19:14:03,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 19:14:03,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-19 19:14:03,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 19:14:03,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 19:14:03,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-19 19:14:03,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 19:14:03,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-19 19:14:03,960 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 5 loop predicates [2021-12-19 19:14:03,960 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand has 26 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 3 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-19 19:14:04,081 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand has 26 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5). Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 3 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 84 states and 116 transitions. Complement of second has 24 states. [2021-12-19 19:14:04,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 1 stem states 5 non-accepting loop states 1 accepting loop states [2021-12-19 19:14:04,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 3 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-19 19:14:04,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 21 transitions. [2021-12-19 19:14:04,096 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 21 transitions. Stem has 3 letters. Loop has 8 letters. [2021-12-19 19:14:04,097 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-19 19:14:04,097 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 21 transitions. Stem has 11 letters. Loop has 8 letters. [2021-12-19 19:14:04,097 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-19 19:14:04,097 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 21 transitions. Stem has 3 letters. Loop has 16 letters. [2021-12-19 19:14:04,098 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-19 19:14:04,098 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 84 states and 116 transitions. [2021-12-19 19:14:04,102 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2021-12-19 19:14:04,106 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 84 states to 61 states and 82 transitions. [2021-12-19 19:14:04,107 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 39 [2021-12-19 19:14:04,107 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 40 [2021-12-19 19:14:04,107 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 82 transitions. [2021-12-19 19:14:04,108 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-12-19 19:14:04,108 INFO L681 BuchiCegarLoop]: Abstraction has 61 states and 82 transitions. [2021-12-19 19:14:04,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states and 82 transitions. [2021-12-19 19:14:04,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 54. [2021-12-19 19:14:04,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 36 states have (on average 1.3055555555555556) internal successors, (47), 38 states have internal predecessors, (47), 12 states have call successors, (12), 8 states have call predecessors, (12), 6 states have return successors, (13), 7 states have call predecessors, (13), 10 states have call successors, (13) [2021-12-19 19:14:04,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 72 transitions. [2021-12-19 19:14:04,126 INFO L704 BuchiCegarLoop]: Abstraction has 54 states and 72 transitions. [2021-12-19 19:14:04,126 INFO L587 BuchiCegarLoop]: Abstraction has 54 states and 72 transitions. [2021-12-19 19:14:04,126 INFO L425 BuchiCegarLoop]: ======== Iteration 2============ [2021-12-19 19:14:04,126 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 54 states and 72 transitions. [2021-12-19 19:14:04,127 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2021-12-19 19:14:04,127 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-19 19:14:04,127 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-19 19:14:04,128 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-19 19:14:04,128 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-19 19:14:04,128 INFO L791 eck$LassoCheckResult]: Stem: 196#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(18, 2);call #Ultimate.allocInit(12, 3); 197#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~ret8#1, main_~x~0#1, main_~result~0#1;main_~x~0#1 := 8; 214#L39 call main_#t~ret8#1 := fibo1(main_~x~0#1);< 213#fibo1ENTRY ~n := #in~n; 215#L10 assume !(~n < 1); 226#L12 assume !(1 == ~n); 208#L15 call #t~ret4 := fibo2(~n - 1);< 230#fibo2ENTRY ~n := #in~n; 236#L20 assume !(~n < 1); 249#L22 assume !(1 == ~n); 204#L25 call #t~ret6 := fibo1(~n - 1);< 216#fibo1ENTRY ~n := #in~n; 217#L10 assume ~n < 1;#res := 0; 205#fibo1FINAL assume true; 206#fibo1EXIT >#46#return; 207#L25-1 [2021-12-19 19:14:04,128 INFO L793 eck$LassoCheckResult]: Loop: 207#L25-1 call #t~ret7 := fibo1(~n - 2);< 212#fibo1ENTRY ~n := #in~n; 240#L10 assume !(~n < 1); 241#L12 assume !(1 == ~n); 211#L15 call #t~ret4 := fibo2(~n - 1);< 220#fibo2ENTRY ~n := #in~n; 243#L20 assume !(~n < 1); 242#L22 assume !(1 == ~n); 219#L25 call #t~ret6 := fibo1(~n - 1);< 212#fibo1ENTRY ~n := #in~n; 240#L10 assume ~n < 1;#res := 0; 238#fibo1FINAL assume true; 239#fibo1EXIT >#46#return; 207#L25-1 [2021-12-19 19:14:04,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 19:14:04,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1888024054, now seen corresponding path program 1 times [2021-12-19 19:14:04,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 19:14:04,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007230029] [2021-12-19 19:14:04,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 19:14:04,129 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 19:14:04,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 19:14:04,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-19 19:14:04,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 19:14:04,178 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-19 19:14:04,178 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 19:14:04,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007230029] [2021-12-19 19:14:04,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007230029] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-19 19:14:04,179 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-19 19:14:04,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-19 19:14:04,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256407766] [2021-12-19 19:14:04,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-19 19:14:04,181 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-12-19 19:14:04,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 19:14:04,181 INFO L85 PathProgramCache]: Analyzing trace with hash 1730504828, now seen corresponding path program 1 times [2021-12-19 19:14:04,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 19:14:04,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907312724] [2021-12-19 19:14:04,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 19:14:04,182 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 19:14:04,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 19:14:04,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-19 19:14:04,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 19:14:04,223 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-19 19:14:04,223 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 19:14:04,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907312724] [2021-12-19 19:14:04,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907312724] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-19 19:14:04,223 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-19 19:14:04,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-19 19:14:04,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51197808] [2021-12-19 19:14:04,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-19 19:14:04,224 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-12-19 19:14:04,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-19 19:14:04,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-19 19:14:04,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-19 19:14:04,227 INFO L87 Difference]: Start difference. First operand 54 states and 72 transitions. cyclomatic complexity: 20 Second operand has 6 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-19 19:14:04,266 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Forceful destruction successful, exit code 0 [2021-12-19 19:14:04,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 19:14:04,297 INFO L93 Difference]: Finished difference Result 68 states and 88 transitions. [2021-12-19 19:14:04,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-19 19:14:04,298 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 68 states and 88 transitions. [2021-12-19 19:14:04,299 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2021-12-19 19:14:04,300 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 68 states to 66 states and 86 transitions. [2021-12-19 19:14:04,301 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 46 [2021-12-19 19:14:04,301 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 46 [2021-12-19 19:14:04,301 INFO L73 IsDeterministic]: Start isDeterministic. Operand 66 states and 86 transitions. [2021-12-19 19:14:04,301 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-12-19 19:14:04,301 INFO L681 BuchiCegarLoop]: Abstraction has 66 states and 86 transitions. [2021-12-19 19:14:04,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states and 86 transitions. [2021-12-19 19:14:04,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 58. [2021-12-19 19:14:04,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 38 states have (on average 1.263157894736842) internal successors, (48), 42 states have internal predecessors, (48), 12 states have call successors, (12), 8 states have call predecessors, (12), 8 states have return successors, (16), 7 states have call predecessors, (16), 10 states have call successors, (16) [2021-12-19 19:14:04,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 76 transitions. [2021-12-19 19:14:04,305 INFO L704 BuchiCegarLoop]: Abstraction has 58 states and 76 transitions. [2021-12-19 19:14:04,305 INFO L587 BuchiCegarLoop]: Abstraction has 58 states and 76 transitions. [2021-12-19 19:14:04,305 INFO L425 BuchiCegarLoop]: ======== Iteration 3============ [2021-12-19 19:14:04,305 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 58 states and 76 transitions. [2021-12-19 19:14:04,306 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2021-12-19 19:14:04,306 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-19 19:14:04,306 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-19 19:14:04,307 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-19 19:14:04,307 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-19 19:14:04,307 INFO L791 eck$LassoCheckResult]: Stem: 341#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(18, 2);call #Ultimate.allocInit(12, 3); 342#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~ret8#1, main_~x~0#1, main_~result~0#1;main_~x~0#1 := 8; 360#L39 call main_#t~ret8#1 := fibo1(main_~x~0#1);< 359#fibo1ENTRY ~n := #in~n; 361#L10 assume !(~n < 1); 371#L12 assume !(1 == ~n); 354#L15 call #t~ret4 := fibo2(~n - 1);< 378#fibo2ENTRY ~n := #in~n; 382#L20 assume !(~n < 1); 398#L22 assume !(1 == ~n); 349#L25 call #t~ret6 := fibo1(~n - 1);< 362#fibo1ENTRY ~n := #in~n; 363#L10 assume !(~n < 1); 387#L12 assume 1 == ~n;#res := 1; 386#fibo1FINAL assume true; 385#fibo1EXIT >#46#return; 351#L25-1 [2021-12-19 19:14:04,307 INFO L793 eck$LassoCheckResult]: Loop: 351#L25-1 call #t~ret7 := fibo1(~n - 2);< 358#fibo1ENTRY ~n := #in~n; 375#L10 assume !(~n < 1); 369#L12 assume !(1 == ~n); 357#L15 call #t~ret4 := fibo2(~n - 1);< 391#fibo2ENTRY ~n := #in~n; 390#L20 assume !(~n < 1); 388#L22 assume !(1 == ~n); 352#L25 call #t~ret6 := fibo1(~n - 1);< 358#fibo1ENTRY ~n := #in~n; 375#L10 assume !(~n < 1); 369#L12 assume 1 == ~n;#res := 1; 370#fibo1FINAL assume true; 384#fibo1EXIT >#46#return; 351#L25-1 [2021-12-19 19:14:04,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 19:14:04,307 INFO L85 PathProgramCache]: Analyzing trace with hash -1600771562, now seen corresponding path program 1 times [2021-12-19 19:14:04,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 19:14:04,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656557221] [2021-12-19 19:14:04,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 19:14:04,308 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 19:14:04,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 19:14:04,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-19 19:14:04,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 19:14:04,352 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-19 19:14:04,352 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 19:14:04,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656557221] [2021-12-19 19:14:04,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656557221] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-19 19:14:04,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388409771] [2021-12-19 19:14:04,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 19:14:04,353 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 19:14:04,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 19:14:04,353 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) [2021-12-19 19:14:04,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-19 19:14:04,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 19:14:04,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-19 19:14:04,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 19:14:04,424 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-19 19:14:04,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-19 19:14:04,517 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-19 19:14:04,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388409771] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-19 19:14:04,518 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-19 19:14:04,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2021-12-19 19:14:04,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315547590] [2021-12-19 19:14:04,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-19 19:14:04,518 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-12-19 19:14:04,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 19:14:04,518 INFO L85 PathProgramCache]: Analyzing trace with hash 2106067024, now seen corresponding path program 1 times [2021-12-19 19:14:04,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 19:14:04,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517952587] [2021-12-19 19:14:04,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 19:14:04,519 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 19:14:04,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-19 19:14:04,523 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-19 19:14:04,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-19 19:14:04,527 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-19 19:14:04,680 INFO L210 LassoAnalysis]: Preferences: [2021-12-19 19:14:04,681 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-19 19:14:04,681 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-19 19:14:04,681 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-19 19:14:04,681 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-12-19 19:14:04,681 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 19:14:04,681 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-19 19:14:04,681 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-19 19:14:04,681 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_8-1.c_Iteration3_Loop [2021-12-19 19:14:04,682 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-19 19:14:04,682 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-19 19:14:04,684 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:04,685 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:04,687 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:04,689 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:04,690 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:04,692 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:04,697 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:04,700 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:04,701 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:04,748 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-19 19:14:04,748 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-12-19 19:14:04,748 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 19:14:04,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 19:14:04,749 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-19 19:14:04,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Waiting until timeout for monitored process [2021-12-19 19:14:04,771 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-19 19:14:04,771 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-19 19:14:04,793 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-19 19:14:04,793 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#t~ret4=0} Honda state: {fibo1_#t~ret4=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-12-19 19:14:04,810 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Forceful destruction successful, exit code 0 [2021-12-19 19:14:04,810 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 19:14:04,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 19:14:04,811 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-19 19:14:04,816 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-19 19:14:04,816 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-19 19:14:04,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Waiting until timeout for monitored process [2021-12-19 19:14:04,833 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-19 19:14:04,833 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#t~ret5=0} Honda state: {fibo1_#t~ret5=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-12-19 19:14:04,850 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Forceful destruction successful, exit code 0 [2021-12-19 19:14:04,853 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 19:14:04,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 19:14:04,854 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-19 19:14:04,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Waiting until timeout for monitored process [2021-12-19 19:14:04,856 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-19 19:14:04,856 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-19 19:14:04,863 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-19 19:14:04,863 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_~n=0} Honda state: {fibo1_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-12-19 19:14:04,880 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Forceful destruction successful, exit code 0 [2021-12-19 19:14:04,880 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 19:14:04,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 19:14:04,881 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-19 19:14:04,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Waiting until timeout for monitored process [2021-12-19 19:14:04,882 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-19 19:14:04,882 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-19 19:14:04,890 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-19 19:14:04,890 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#t~ret7=0} Honda state: {fibo2_#t~ret7=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-12-19 19:14:04,904 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Ended with exit code 0 [2021-12-19 19:14:04,920 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 19:14:04,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 19:14:04,921 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-19 19:14:04,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Waiting until timeout for monitored process [2021-12-19 19:14:04,922 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-19 19:14:04,922 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-19 19:14:04,931 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-19 19:14:04,931 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#res=0} Honda state: {fibo1_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-12-19 19:14:04,947 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Forceful destruction successful, exit code 0 [2021-12-19 19:14:04,947 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 19:14:04,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 19:14:04,948 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-19 19:14:04,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Waiting until timeout for monitored process [2021-12-19 19:14:04,950 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-19 19:14:04,950 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-19 19:14:04,971 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 [2021-12-19 19:14:04,972 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 19:14:04,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 19:14:04,973 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-19 19:14:04,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Waiting until timeout for monitored process [2021-12-19 19:14:04,974 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-12-19 19:14:04,974 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-19 19:14:05,795 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-12-19 19:14:05,799 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Forceful destruction successful, exit code 0 [2021-12-19 19:14:05,799 INFO L210 LassoAnalysis]: Preferences: [2021-12-19 19:14:05,799 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-19 19:14:05,799 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-19 19:14:05,799 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-19 19:14:05,799 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-12-19 19:14:05,799 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 19:14:05,799 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-19 19:14:05,799 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-19 19:14:05,799 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_8-1.c_Iteration3_Loop [2021-12-19 19:14:05,799 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-19 19:14:05,799 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-19 19:14:05,800 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:05,811 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:05,813 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:05,814 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:05,815 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:05,820 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:05,821 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:05,822 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:05,824 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:05,857 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-19 19:14:05,857 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-12-19 19:14:05,857 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 19:14:05,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 19:14:05,858 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) [2021-12-19 19:14:05,859 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 [2021-12-19 19:14:05,860 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-12-19 19:14:05,866 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-19 19:14:05,866 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-19 19:14:05,866 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-19 19:14:05,866 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-19 19:14:05,866 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-19 19:14:05,866 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-19 19:14:05,866 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-19 19:14:05,881 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-19 19:14:05,897 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 [2021-12-19 19:14:05,898 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 19:14:05,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 19:14:05,898 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-19 19:14:05,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (31)] Waiting until timeout for monitored process [2021-12-19 19:14:05,900 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-12-19 19:14:05,905 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-19 19:14:05,906 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-19 19:14:05,906 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-19 19:14:05,906 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-19 19:14:05,906 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-19 19:14:05,906 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-19 19:14:05,906 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-19 19:14:05,919 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-19 19:14:05,937 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (31)] Forceful destruction successful, exit code 0 [2021-12-19 19:14:05,937 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 19:14:05,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 19:14:05,938 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-19 19:14:05,959 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 [2021-12-19 19:14:05,960 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-12-19 19:14:05,965 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-19 19:14:05,965 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-19 19:14:05,966 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-19 19:14:05,966 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-19 19:14:05,966 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-19 19:14:05,966 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-19 19:14:05,966 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-19 19:14:05,979 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-19 19:14:05,994 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (32)] Forceful destruction successful, exit code 0 [2021-12-19 19:14:05,994 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 19:14:05,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 19:14:05,995 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-19 19:14:05,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (33)] Waiting until timeout for monitored process [2021-12-19 19:14:05,997 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-12-19 19:14:06,002 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-19 19:14:06,002 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-19 19:14:06,002 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-19 19:14:06,002 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-19 19:14:06,002 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-19 19:14:06,003 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-19 19:14:06,003 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-19 19:14:06,014 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-19 19:14:06,031 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 [2021-12-19 19:14:06,031 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 19:14:06,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 19:14:06,032 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-19 19:14:06,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (34)] Waiting until timeout for monitored process [2021-12-19 19:14:06,034 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-12-19 19:14:06,039 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-19 19:14:06,039 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-19 19:14:06,039 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-19 19:14:06,039 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-19 19:14:06,039 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-19 19:14:06,040 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-19 19:14:06,040 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-19 19:14:06,042 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-12-19 19:14:06,044 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-12-19 19:14:06,044 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-12-19 19:14:06,044 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 19:14:06,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 19:14:06,046 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-19 19:14:06,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (35)] Waiting until timeout for monitored process [2021-12-19 19:14:06,050 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-12-19 19:14:06,050 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-12-19 19:14:06,050 INFO L513 LassoAnalysis]: Proved termination. [2021-12-19 19:14:06,050 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo2_~n) = 1*fibo2_~n Supporting invariants [] [2021-12-19 19:14:06,065 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 [2021-12-19 19:14:06,065 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-12-19 19:14:06,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 19:14:06,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 19:14:06,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-19 19:14:06,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 19:14:06,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 19:14:06,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-19 19:14:06,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 19:14:06,308 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-19 19:14:06,309 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 [2021-12-19 19:14:06,309 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 58 states and 76 transitions. cyclomatic complexity: 20 Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-19 19:14:06,587 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 58 states and 76 transitions. cyclomatic complexity: 20. Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Result 191 states and 263 transitions. Complement of second has 40 states. [2021-12-19 19:14:06,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 12 states 2 stem states 9 non-accepting loop states 1 accepting loop states [2021-12-19 19:14:06,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 6 states have internal predecessors, (22), 4 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-19 19:14:06,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 73 transitions. [2021-12-19 19:14:06,589 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 73 transitions. Stem has 16 letters. Loop has 14 letters. [2021-12-19 19:14:06,589 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-19 19:14:06,589 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 73 transitions. Stem has 30 letters. Loop has 14 letters. [2021-12-19 19:14:06,590 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-19 19:14:06,590 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 73 transitions. Stem has 16 letters. Loop has 28 letters. [2021-12-19 19:14:06,590 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-19 19:14:06,591 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 191 states and 263 transitions. [2021-12-19 19:14:06,594 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 20 [2021-12-19 19:14:06,597 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 191 states to 169 states and 237 transitions. [2021-12-19 19:14:06,597 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 103 [2021-12-19 19:14:06,598 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 106 [2021-12-19 19:14:06,598 INFO L73 IsDeterministic]: Start isDeterministic. Operand 169 states and 237 transitions. [2021-12-19 19:14:06,599 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-12-19 19:14:06,599 INFO L681 BuchiCegarLoop]: Abstraction has 169 states and 237 transitions. [2021-12-19 19:14:06,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states and 237 transitions. [2021-12-19 19:14:06,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 152. [2021-12-19 19:14:06,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 95 states have (on average 1.2842105263157895) internal successors, (122), 102 states have internal predecessors, (122), 35 states have call successors, (36), 19 states have call predecessors, (36), 22 states have return successors, (48), 30 states have call predecessors, (48), 33 states have call successors, (48) [2021-12-19 19:14:06,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 206 transitions. [2021-12-19 19:14:06,608 INFO L704 BuchiCegarLoop]: Abstraction has 152 states and 206 transitions. [2021-12-19 19:14:06,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-19 19:14:06,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-19 19:14:06,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-12-19 19:14:06,609 INFO L87 Difference]: Start difference. First operand 152 states and 206 transitions. Second operand has 16 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 6 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-19 19:14:06,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 19:14:06,759 INFO L93 Difference]: Finished difference Result 213 states and 281 transitions. [2021-12-19 19:14:06,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-19 19:14:06,760 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 213 states and 281 transitions. [2021-12-19 19:14:06,763 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 20 [2021-12-19 19:14:06,765 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 213 states to 204 states and 272 transitions. [2021-12-19 19:14:06,765 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 133 [2021-12-19 19:14:06,766 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 133 [2021-12-19 19:14:06,766 INFO L73 IsDeterministic]: Start isDeterministic. Operand 204 states and 272 transitions. [2021-12-19 19:14:06,766 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-12-19 19:14:06,766 INFO L681 BuchiCegarLoop]: Abstraction has 204 states and 272 transitions. [2021-12-19 19:14:06,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states and 272 transitions. [2021-12-19 19:14:06,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 192. [2021-12-19 19:14:06,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 120 states have (on average 1.225) internal successors, (147), 129 states have internal predecessors, (147), 44 states have call successors, (46), 24 states have call predecessors, (46), 28 states have return successors, (64), 38 states have call predecessors, (64), 42 states have call successors, (64) [2021-12-19 19:14:06,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 257 transitions. [2021-12-19 19:14:06,775 INFO L704 BuchiCegarLoop]: Abstraction has 192 states and 257 transitions. [2021-12-19 19:14:06,775 INFO L587 BuchiCegarLoop]: Abstraction has 192 states and 257 transitions. [2021-12-19 19:14:06,775 INFO L425 BuchiCegarLoop]: ======== Iteration 4============ [2021-12-19 19:14:06,775 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 192 states and 257 transitions. [2021-12-19 19:14:06,777 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 20 [2021-12-19 19:14:06,777 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-19 19:14:06,777 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-19 19:14:06,781 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-19 19:14:06,797 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-19 19:14:06,797 INFO L791 eck$LassoCheckResult]: Stem: 1241#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(18, 2);call #Ultimate.allocInit(12, 3); 1242#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~ret8#1, main_~x~0#1, main_~result~0#1;main_~x~0#1 := 8; 1276#L39 call main_#t~ret8#1 := fibo1(main_~x~0#1);< 1313#fibo1ENTRY ~n := #in~n; 1350#L10 assume !(~n < 1); 1349#L12 assume !(1 == ~n); 1259#L15 call #t~ret4 := fibo2(~n - 1);< 1348#fibo2ENTRY ~n := #in~n; 1347#L20 assume !(~n < 1); 1346#L22 assume !(1 == ~n); 1271#L25 call #t~ret6 := fibo1(~n - 1);< 1270#fibo1ENTRY ~n := #in~n; 1272#L10 assume !(~n < 1); 1292#L12 assume !(1 == ~n); 1293#L15 call #t~ret4 := fibo2(~n - 1);< 1299#fibo2ENTRY ~n := #in~n; 1426#L20 assume !(~n < 1); 1425#L22 assume !(1 == ~n); 1280#L25 call #t~ret6 := fibo1(~n - 1);< 1344#fibo1ENTRY ~n := #in~n; 1345#L10 assume !(~n < 1); 1355#L12 assume !(1 == ~n); 1356#L15 call #t~ret4 := fibo2(~n - 1);< 1364#fibo2ENTRY ~n := #in~n; 1368#L20 assume ~n < 1;#res := 0; 1367#fibo2FINAL assume true; 1363#fibo2EXIT >#50#return; 1360#L15-1 call #t~ret5 := fibo2(~n - 2);< 1361#fibo2ENTRY ~n := #in~n; 1365#L20 assume ~n < 1;#res := 0; 1362#fibo2FINAL assume true; 1359#fibo2EXIT >#52#return; 1357#L15-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 1358#fibo1FINAL assume true; 1424#fibo1EXIT >#46#return; 1332#L25-1 call #t~ret7 := fibo1(~n - 2);< 1343#fibo1ENTRY ~n := #in~n; 1376#L10 assume ~n < 1;#res := 0; 1431#fibo1FINAL assume true; 1422#fibo1EXIT >#48#return; 1420#L25-2 #res := #t~ret6 + #t~ret7;havoc #t~ret6;havoc #t~ret7; 1419#fibo2FINAL assume true; 1416#fibo2EXIT >#50#return; 1246#L15-1 call #t~ret5 := fibo2(~n - 2);< 1298#fibo2ENTRY [2021-12-19 19:14:06,797 INFO L793 eck$LassoCheckResult]: Loop: 1298#fibo2ENTRY ~n := #in~n; 1429#L20 assume !(~n < 1); 1243#L22 assume !(1 == ~n); 1248#L25 call #t~ret6 := fibo1(~n - 1);< 1265#fibo1ENTRY ~n := #in~n; 1269#L10 assume !(~n < 1); 1290#L12 assume !(1 == ~n); 1245#L15 call #t~ret4 := fibo2(~n - 1);< 1298#fibo2ENTRY [2021-12-19 19:14:06,797 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (35)] Forceful destruction successful, exit code 0 [2021-12-19 19:14:06,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 19:14:06,800 INFO L85 PathProgramCache]: Analyzing trace with hash -960039395, now seen corresponding path program 1 times [2021-12-19 19:14:06,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 19:14:06,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997546427] [2021-12-19 19:14:06,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 19:14:06,800 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 19:14:06,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 19:14:06,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-19 19:14:06,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 19:14:06,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-19 19:14:06,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 19:14:06,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-19 19:14:06,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 19:14:06,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-19 19:14:06,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 19:14:06,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-19 19:14:06,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 19:14:06,864 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-19 19:14:06,864 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 19:14:06,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997546427] [2021-12-19 19:14:06,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997546427] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-19 19:14:06,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390125542] [2021-12-19 19:14:06,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 19:14:06,865 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 19:14:06,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 19:14:06,866 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-19 19:14:06,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-12-19 19:14:06,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 19:14:06,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-19 19:14:06,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 19:14:07,039 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-19 19:14:07,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-19 19:14:07,385 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 3 proven. 34 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-19 19:14:07,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390125542] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-19 19:14:07,385 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-19 19:14:07,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 14, 15] total 25 [2021-12-19 19:14:07,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828146374] [2021-12-19 19:14:07,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-19 19:14:07,386 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-12-19 19:14:07,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 19:14:07,386 INFO L85 PathProgramCache]: Analyzing trace with hash -28526872, now seen corresponding path program 2 times [2021-12-19 19:14:07,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 19:14:07,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879978884] [2021-12-19 19:14:07,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 19:14:07,386 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 19:14:07,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-19 19:14:07,406 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-19 19:14:07,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-19 19:14:07,409 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-19 19:14:07,489 INFO L210 LassoAnalysis]: Preferences: [2021-12-19 19:14:07,490 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-19 19:14:07,490 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-19 19:14:07,490 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-19 19:14:07,490 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-12-19 19:14:07,490 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 19:14:07,490 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-19 19:14:07,490 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-19 19:14:07,490 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_8-1.c_Iteration4_Loop [2021-12-19 19:14:07,490 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-19 19:14:07,490 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-19 19:14:07,492 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:07,493 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:07,494 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:07,495 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:07,496 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:07,497 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:07,498 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:07,499 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:07,500 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:07,501 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:07,533 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-19 19:14:07,534 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-12-19 19:14:07,534 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 19:14:07,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 19:14:07,535 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-19 19:14:07,559 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-19 19:14:07,559 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-19 19:14:07,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (37)] Waiting until timeout for monitored process [2021-12-19 19:14:07,570 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-19 19:14:07,570 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#t~ret4=0} Honda state: {fibo1_#t~ret4=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-12-19 19:14:07,585 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (37)] Ended with exit code 0 [2021-12-19 19:14:07,585 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 19:14:07,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 19:14:07,586 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-19 19:14:07,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (38)] Waiting until timeout for monitored process [2021-12-19 19:14:07,588 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-19 19:14:07,588 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-19 19:14:07,594 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-19 19:14:07,594 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#t~ret7=0} Honda state: {fibo2_#t~ret7=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-12-19 19:14:07,610 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (38)] Forceful destruction successful, exit code 0 [2021-12-19 19:14:07,611 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 19:14:07,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 19:14:07,611 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-19 19:14:07,612 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (39)] Waiting until timeout for monitored process [2021-12-19 19:14:07,613 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-19 19:14:07,615 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-19 19:14:07,632 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-19 19:14:07,633 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#in~n=0} Honda state: {fibo1_#in~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-12-19 19:14:07,647 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (39)] Forceful destruction successful, exit code 0 [2021-12-19 19:14:07,648 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 19:14:07,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 19:14:07,648 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-19 19:14:07,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (40)] Waiting until timeout for monitored process [2021-12-19 19:14:07,652 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-19 19:14:07,652 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-19 19:14:07,657 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-19 19:14:07,658 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#t~ret6=0} Honda state: {fibo2_#t~ret6=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-12-19 19:14:07,672 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (40)] Forceful destruction successful, exit code 0 [2021-12-19 19:14:07,673 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 19:14:07,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 19:14:07,673 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-19 19:14:07,674 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (41)] Waiting until timeout for monitored process [2021-12-19 19:14:07,675 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-19 19:14:07,675 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-19 19:14:07,687 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-19 19:14:07,687 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#res=0} Honda state: {fibo2_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-12-19 19:14:07,702 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (41)] Forceful destruction successful, exit code 0 [2021-12-19 19:14:07,702 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 19:14:07,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 19:14:07,703 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-19 19:14:07,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (42)] Waiting until timeout for monitored process [2021-12-19 19:14:07,706 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-19 19:14:07,706 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-19 19:14:07,712 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-19 19:14:07,712 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#res=0} Honda state: {fibo1_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-12-19 19:14:07,727 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (42)] Ended with exit code 0 [2021-12-19 19:14:07,727 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 19:14:07,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 19:14:07,728 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-19 19:14:07,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (43)] Waiting until timeout for monitored process [2021-12-19 19:14:07,730 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-19 19:14:07,730 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-19 19:14:07,736 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-19 19:14:07,736 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_~n=0} Honda state: {fibo1_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-12-19 19:14:07,750 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (43)] Forceful destruction successful, exit code 0 [2021-12-19 19:14:07,751 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 19:14:07,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 19:14:07,751 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-19 19:14:07,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (44)] Waiting until timeout for monitored process [2021-12-19 19:14:07,753 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-19 19:14:07,753 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-19 19:14:07,759 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-19 19:14:07,759 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_~n=0} Honda state: {fibo2_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-12-19 19:14:07,774 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (44)] Ended with exit code 0 [2021-12-19 19:14:07,774 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 19:14:07,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 19:14:07,775 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-19 19:14:07,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (45)] Waiting until timeout for monitored process [2021-12-19 19:14:07,777 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-19 19:14:07,777 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-19 19:14:07,783 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-19 19:14:07,783 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#t~ret5=0} Honda state: {fibo1_#t~ret5=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-12-19 19:14:07,798 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (45)] Forceful destruction successful, exit code 0 [2021-12-19 19:14:07,798 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 19:14:07,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 19:14:07,799 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-19 19:14:07,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (46)] Waiting until timeout for monitored process [2021-12-19 19:14:07,801 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-19 19:14:07,801 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-19 19:14:07,822 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (46)] Forceful destruction successful, exit code 0 [2021-12-19 19:14:07,822 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 19:14:07,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 19:14:07,823 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-19 19:14:07,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (47)] Waiting until timeout for monitored process [2021-12-19 19:14:07,825 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-12-19 19:14:07,825 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-19 19:14:07,873 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-12-19 19:14:07,876 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (47)] Forceful destruction successful, exit code 0 [2021-12-19 19:14:07,876 INFO L210 LassoAnalysis]: Preferences: [2021-12-19 19:14:07,876 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-19 19:14:07,876 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-19 19:14:07,876 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-19 19:14:07,876 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-12-19 19:14:07,876 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 19:14:07,876 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-19 19:14:07,877 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-19 19:14:07,877 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_8-1.c_Iteration4_Loop [2021-12-19 19:14:07,877 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-19 19:14:07,877 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-19 19:14:07,877 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:07,879 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:07,880 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:07,881 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:07,883 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:07,885 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:07,886 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:07,887 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:07,888 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:07,889 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:07,930 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-19 19:14:07,930 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-12-19 19:14:07,930 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 19:14:07,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 19:14:07,931 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-19 19:14:07,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (48)] Waiting until timeout for monitored process [2021-12-19 19:14:07,933 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-12-19 19:14:07,938 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-19 19:14:07,939 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-19 19:14:07,939 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-19 19:14:07,939 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-19 19:14:07,939 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-19 19:14:07,952 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-19 19:14:07,952 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-19 19:14:07,967 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-19 19:14:07,982 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (48)] Forceful destruction successful, exit code 0 [2021-12-19 19:14:07,982 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 19:14:07,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 19:14:07,983 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-19 19:14:07,988 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-12-19 19:14:07,994 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-19 19:14:07,994 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-19 19:14:07,994 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-19 19:14:07,994 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-19 19:14:07,994 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-19 19:14:07,995 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-19 19:14:07,995 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-19 19:14:07,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (49)] Waiting until timeout for monitored process [2021-12-19 19:14:07,996 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-19 19:14:08,011 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (49)] Forceful destruction successful, exit code 0 [2021-12-19 19:14:08,011 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 19:14:08,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 19:14:08,012 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-19 19:14:08,014 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-12-19 19:14:08,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (50)] Waiting until timeout for monitored process [2021-12-19 19:14:08,020 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-19 19:14:08,020 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-19 19:14:08,020 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-19 19:14:08,020 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-19 19:14:08,020 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-19 19:14:08,020 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-19 19:14:08,021 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-19 19:14:08,023 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-19 19:14:08,037 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (50)] Forceful destruction successful, exit code 0 [2021-12-19 19:14:08,037 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 19:14:08,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 19:14:08,038 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-19 19:14:08,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (51)] Waiting until timeout for monitored process [2021-12-19 19:14:08,039 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-12-19 19:14:08,045 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-19 19:14:08,045 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-19 19:14:08,045 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-19 19:14:08,045 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-19 19:14:08,045 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-19 19:14:08,045 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-19 19:14:08,045 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-19 19:14:08,061 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-19 19:14:08,075 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (51)] Ended with exit code 0 [2021-12-19 19:14:08,075 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 19:14:08,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 19:14:08,076 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-19 19:14:08,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (52)] Waiting until timeout for monitored process [2021-12-19 19:14:08,078 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-12-19 19:14:08,083 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-19 19:14:08,083 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-19 19:14:08,083 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-19 19:14:08,083 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-19 19:14:08,084 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-19 19:14:08,084 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-19 19:14:08,084 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-19 19:14:08,087 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-19 19:14:08,101 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (52)] Forceful destruction successful, exit code 0 [2021-12-19 19:14:08,101 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 19:14:08,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 19:14:08,102 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-19 19:14:08,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (53)] Waiting until timeout for monitored process [2021-12-19 19:14:08,104 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-12-19 19:14:08,109 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-19 19:14:08,109 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-19 19:14:08,109 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-19 19:14:08,109 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-19 19:14:08,109 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-19 19:14:08,109 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-19 19:14:08,109 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-19 19:14:08,118 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-19 19:14:08,132 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (53)] Ended with exit code 0 [2021-12-19 19:14:08,133 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 19:14:08,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 19:14:08,133 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-19 19:14:08,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (54)] Waiting until timeout for monitored process [2021-12-19 19:14:08,135 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-12-19 19:14:08,140 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-19 19:14:08,141 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-19 19:14:08,141 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-19 19:14:08,141 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-19 19:14:08,141 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-19 19:14:08,141 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-19 19:14:08,141 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-19 19:14:08,142 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-19 19:14:08,156 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (54)] Ended with exit code 0 [2021-12-19 19:14:08,156 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 19:14:08,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 19:14:08,157 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-19 19:14:08,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (55)] Waiting until timeout for monitored process [2021-12-19 19:14:08,158 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-12-19 19:14:08,163 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-19 19:14:08,163 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-19 19:14:08,164 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-19 19:14:08,164 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-19 19:14:08,164 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-19 19:14:08,164 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-19 19:14:08,164 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-19 19:14:08,175 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-19 19:14:08,189 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (55)] Ended with exit code 0 [2021-12-19 19:14:08,190 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 19:14:08,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 19:14:08,191 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-19 19:14:08,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (56)] Waiting until timeout for monitored process [2021-12-19 19:14:08,193 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-12-19 19:14:08,198 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-19 19:14:08,198 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-19 19:14:08,198 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-19 19:14:08,198 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-19 19:14:08,198 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-19 19:14:08,198 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-19 19:14:08,198 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-19 19:14:08,199 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-19 19:14:08,213 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (56)] Ended with exit code 0 [2021-12-19 19:14:08,214 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 19:14:08,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 19:14:08,215 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-19 19:14:08,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (57)] Waiting until timeout for monitored process [2021-12-19 19:14:08,217 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-12-19 19:14:08,222 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-19 19:14:08,222 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-19 19:14:08,222 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-19 19:14:08,222 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-19 19:14:08,222 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-19 19:14:08,228 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-19 19:14:08,228 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-19 19:14:08,244 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-12-19 19:14:08,246 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2021-12-19 19:14:08,246 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2021-12-19 19:14:08,246 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 19:14:08,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 19:14:08,247 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-19 19:14:08,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (58)] Waiting until timeout for monitored process [2021-12-19 19:14:08,249 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-12-19 19:14:08,249 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-12-19 19:14:08,249 INFO L513 LassoAnalysis]: Proved termination. [2021-12-19 19:14:08,249 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo2_#in~n) = 1*fibo2_#in~n Supporting invariants [] [2021-12-19 19:14:08,263 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (57)] Ended with exit code 0 [2021-12-19 19:14:08,264 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-12-19 19:14:08,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 19:14:08,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 19:14:08,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-19 19:14:08,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 19:14:08,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 19:14:08,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-19 19:14:08,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 19:14:08,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-19 19:14:08,672 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 5 loop predicates [2021-12-19 19:14:08,672 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 192 states and 257 transitions. cyclomatic complexity: 70 Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 5 states have internal predecessors, (26), 4 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-19 19:14:08,747 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (58)] Ended with exit code 0 [2021-12-19 19:14:08,811 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 192 states and 257 transitions. cyclomatic complexity: 70. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 5 states have internal predecessors, (26), 4 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Result 698 states and 973 transitions. Complement of second has 26 states. [2021-12-19 19:14:08,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 8 states 2 stem states 5 non-accepting loop states 1 accepting loop states [2021-12-19 19:14:08,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 5 states have internal predecessors, (26), 4 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-19 19:14:08,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 40 transitions. [2021-12-19 19:14:08,812 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 40 transitions. Stem has 44 letters. Loop has 8 letters. [2021-12-19 19:14:08,812 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-19 19:14:08,812 INFO L634 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-12-19 19:14:08,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 19:14:08,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 19:14:08,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-19 19:14:08,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 19:14:09,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 19:14:09,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-19 19:14:09,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 19:14:09,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-19 19:14:09,197 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 5 loop predicates [2021-12-19 19:14:09,197 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 192 states and 257 transitions. cyclomatic complexity: 70 Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 5 states have internal predecessors, (26), 4 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-19 19:14:09,295 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 192 states and 257 transitions. cyclomatic complexity: 70. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 5 states have internal predecessors, (26), 4 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Result 698 states and 973 transitions. Complement of second has 26 states. [2021-12-19 19:14:09,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 8 states 2 stem states 5 non-accepting loop states 1 accepting loop states [2021-12-19 19:14:09,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 5 states have internal predecessors, (26), 4 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-19 19:14:09,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 40 transitions. [2021-12-19 19:14:09,297 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 40 transitions. Stem has 44 letters. Loop has 8 letters. [2021-12-19 19:14:09,297 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-19 19:14:09,297 INFO L634 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-12-19 19:14:09,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 19:14:09,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 19:14:09,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-19 19:14:09,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 19:14:09,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 19:14:09,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-19 19:14:09,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 19:14:09,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-19 19:14:09,644 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 5 loop predicates [2021-12-19 19:14:09,644 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 192 states and 257 transitions. cyclomatic complexity: 70 Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 5 states have internal predecessors, (26), 4 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-19 19:14:09,762 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 192 states and 257 transitions. cyclomatic complexity: 70. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 5 states have internal predecessors, (26), 4 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Result 587 states and 803 transitions. Complement of second has 25 states. [2021-12-19 19:14:09,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 8 states 2 stem states 5 non-accepting loop states 1 accepting loop states [2021-12-19 19:14:09,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 5 states have internal predecessors, (26), 4 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-19 19:14:09,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 43 transitions. [2021-12-19 19:14:09,763 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 43 transitions. Stem has 44 letters. Loop has 8 letters. [2021-12-19 19:14:09,764 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-19 19:14:09,764 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 43 transitions. Stem has 52 letters. Loop has 8 letters. [2021-12-19 19:14:09,764 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-19 19:14:09,764 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 43 transitions. Stem has 44 letters. Loop has 16 letters. [2021-12-19 19:14:09,764 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-19 19:14:09,764 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 587 states and 803 transitions. [2021-12-19 19:14:09,769 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 56 [2021-12-19 19:14:09,774 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 587 states to 476 states and 676 transitions. [2021-12-19 19:14:09,774 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 215 [2021-12-19 19:14:09,775 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 246 [2021-12-19 19:14:09,775 INFO L73 IsDeterministic]: Start isDeterministic. Operand 476 states and 676 transitions. [2021-12-19 19:14:09,775 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-12-19 19:14:09,775 INFO L681 BuchiCegarLoop]: Abstraction has 476 states and 676 transitions. [2021-12-19 19:14:09,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states and 676 transitions. [2021-12-19 19:14:09,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 401. [2021-12-19 19:14:09,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 267 states have (on average 1.2621722846441947) internal successors, (337), 290 states have internal predecessors, (337), 78 states have call successors, (81), 60 states have call predecessors, (81), 56 states have return successors, (126), 50 states have call predecessors, (126), 76 states have call successors, (126) [2021-12-19 19:14:09,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 544 transitions. [2021-12-19 19:14:09,790 INFO L704 BuchiCegarLoop]: Abstraction has 401 states and 544 transitions. [2021-12-19 19:14:09,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-19 19:14:09,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-19 19:14:09,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2021-12-19 19:14:09,791 INFO L87 Difference]: Start difference. First operand 401 states and 544 transitions. Second operand has 25 states, 22 states have (on average 2.590909090909091) internal successors, (57), 20 states have internal predecessors, (57), 16 states have call successors, (21), 7 states have call predecessors, (21), 5 states have return successors, (13), 3 states have call predecessors, (13), 11 states have call successors, (13) [2021-12-19 19:14:10,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 19:14:10,165 INFO L93 Difference]: Finished difference Result 499 states and 693 transitions. [2021-12-19 19:14:10,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-19 19:14:10,166 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 499 states and 693 transitions. [2021-12-19 19:14:10,170 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 60 [2021-12-19 19:14:10,174 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 499 states to 457 states and 645 transitions. [2021-12-19 19:14:10,174 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 256 [2021-12-19 19:14:10,175 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 257 [2021-12-19 19:14:10,175 INFO L73 IsDeterministic]: Start isDeterministic. Operand 457 states and 645 transitions. [2021-12-19 19:14:10,175 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-12-19 19:14:10,175 INFO L681 BuchiCegarLoop]: Abstraction has 457 states and 645 transitions. [2021-12-19 19:14:10,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states and 645 transitions. [2021-12-19 19:14:10,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 414. [2021-12-19 19:14:10,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 269 states have (on average 1.20817843866171) internal successors, (325), 298 states have internal predecessors, (325), 85 states have call successors, (87), 57 states have call predecessors, (87), 60 states have return successors, (161), 58 states have call predecessors, (161), 83 states have call successors, (161) [2021-12-19 19:14:10,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 573 transitions. [2021-12-19 19:14:10,186 INFO L704 BuchiCegarLoop]: Abstraction has 414 states and 573 transitions. [2021-12-19 19:14:10,186 INFO L587 BuchiCegarLoop]: Abstraction has 414 states and 573 transitions. [2021-12-19 19:14:10,186 INFO L425 BuchiCegarLoop]: ======== Iteration 5============ [2021-12-19 19:14:10,186 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 414 states and 573 transitions. [2021-12-19 19:14:10,188 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 60 [2021-12-19 19:14:10,188 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-19 19:14:10,188 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-19 19:14:10,189 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [5, 5, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-19 19:14:10,189 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-19 19:14:10,189 INFO L791 eck$LassoCheckResult]: Stem: 5286#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(18, 2);call #Ultimate.allocInit(12, 3); 5287#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~ret8#1, main_~x~0#1, main_~result~0#1;main_~x~0#1 := 8; 5315#L39 call main_#t~ret8#1 := fibo1(main_~x~0#1);< 5369#fibo1ENTRY ~n := #in~n; 5421#L10 assume !(~n < 1); 5420#L12 assume !(1 == ~n); 5416#L15 call #t~ret4 := fibo2(~n - 1);< 5419#fibo2ENTRY ~n := #in~n; 5418#L20 assume !(~n < 1); 5417#L22 assume !(1 == ~n); 5412#L25 call #t~ret6 := fibo1(~n - 1);< 5415#fibo1ENTRY ~n := #in~n; 5414#L10 assume !(~n < 1); 5413#L12 assume !(1 == ~n); 5408#L15 call #t~ret4 := fibo2(~n - 1);< 5411#fibo2ENTRY ~n := #in~n; 5410#L20 assume !(~n < 1); 5409#L22 assume !(1 == ~n); 5404#L25 call #t~ret6 := fibo1(~n - 1);< 5407#fibo1ENTRY ~n := #in~n; 5406#L10 assume !(~n < 1); 5405#L12 assume !(1 == ~n); 5390#L15 call #t~ret4 := fibo2(~n - 1);< 5403#fibo2ENTRY ~n := #in~n; 5399#L20 assume !(~n < 1); 5400#L22 assume !(1 == ~n); 5318#L25 call #t~ret6 := fibo1(~n - 1);< 5427#fibo1ENTRY ~n := #in~n; 5428#L10 assume !(~n < 1); 5578#L12 assume 1 == ~n;#res := 1; 5579#fibo1FINAL assume true; 5644#fibo1EXIT >#46#return; 5487#L25-1 call #t~ret7 := fibo1(~n - 2);< 5498#fibo1ENTRY ~n := #in~n; 5494#L10 assume !(~n < 1); 5495#L12 assume !(1 == ~n); 5479#L15 call #t~ret4 := fibo2(~n - 1);< 5486#fibo2ENTRY ~n := #in~n; 5484#L20 assume !(~n < 1); 5481#L22 assume 1 == ~n;#res := 1; 5482#fibo2FINAL assume true; 5567#fibo2EXIT >#50#return; 5356#L15-1 [2021-12-19 19:14:10,190 INFO L793 eck$LassoCheckResult]: Loop: 5356#L15-1 call #t~ret5 := fibo2(~n - 2);< 5529#fibo2ENTRY ~n := #in~n; 5348#L20 assume !(~n < 1); 5357#L22 assume !(1 == ~n); 5550#L25 call #t~ret6 := fibo1(~n - 1);< 5558#fibo1ENTRY ~n := #in~n; 5597#L10 assume !(~n < 1); 5596#L12 assume 1 == ~n;#res := 1; 5595#fibo1FINAL assume true; 5593#fibo1EXIT >#46#return; 5585#L25-1 call #t~ret7 := fibo1(~n - 2);< 5591#fibo1ENTRY ~n := #in~n; 5590#L10 assume !(~n < 1); 5589#L12 assume !(1 == ~n); 5350#L15 call #t~ret4 := fibo2(~n - 1);< 5362#fibo2ENTRY ~n := #in~n; 5363#L20 assume !(~n < 1); 5630#L22 assume !(1 == ~n); 5607#L25 call #t~ret6 := fibo1(~n - 1);< 5608#fibo1ENTRY ~n := #in~n; 5622#L10 assume !(~n < 1); 5620#L12 assume 1 == ~n;#res := 1; 5619#fibo1FINAL assume true; 5606#fibo1EXIT >#46#return; 5603#L25-1 call #t~ret7 := fibo1(~n - 2);< 5605#fibo1ENTRY ~n := #in~n; 5652#L10 assume ~n < 1;#res := 0; 5649#fibo1FINAL assume true; 5602#fibo1EXIT >#48#return; 5555#L25-2 #res := #t~ret6 + #t~ret7;havoc #t~ret6;havoc #t~ret7; 5599#fibo2FINAL assume true; 5564#fibo2EXIT >#50#return; 5356#L15-1 [2021-12-19 19:14:10,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 19:14:10,190 INFO L85 PathProgramCache]: Analyzing trace with hash -1816161101, now seen corresponding path program 1 times [2021-12-19 19:14:10,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 19:14:10,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550771572] [2021-12-19 19:14:10,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 19:14:10,190 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 19:14:10,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 19:14:10,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-19 19:14:10,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 19:14:10,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-19 19:14:10,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 19:14:10,295 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-19 19:14:10,295 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 19:14:10,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550771572] [2021-12-19 19:14:10,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550771572] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-19 19:14:10,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091452751] [2021-12-19 19:14:10,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 19:14:10,296 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 19:14:10,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 19:14:10,296 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-19 19:14:10,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-12-19 19:14:10,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 19:14:10,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-19 19:14:10,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 19:14:10,390 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 24 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-19 19:14:10,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-19 19:14:10,490 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-19 19:14:10,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091452751] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-19 19:14:10,490 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-19 19:14:10,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 19 [2021-12-19 19:14:10,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492190807] [2021-12-19 19:14:10,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-19 19:14:10,491 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-12-19 19:14:10,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 19:14:10,491 INFO L85 PathProgramCache]: Analyzing trace with hash 1364976163, now seen corresponding path program 1 times [2021-12-19 19:14:10,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 19:14:10,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001935622] [2021-12-19 19:14:10,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 19:14:10,491 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 19:14:10,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 19:14:10,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-19 19:14:10,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 19:14:10,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-19 19:14:10,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 19:14:10,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-19 19:14:10,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 19:14:10,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-19 19:14:10,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 19:14:10,530 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-19 19:14:10,530 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 19:14:10,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001935622] [2021-12-19 19:14:10,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001935622] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-19 19:14:10,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844952963] [2021-12-19 19:14:10,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 19:14:10,530 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 19:14:10,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 19:14:10,531 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-19 19:14:10,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-12-19 19:14:10,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 19:14:10,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-19 19:14:10,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 19:14:10,598 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 20 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-19 19:14:10,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-19 19:14:10,688 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-19 19:14:10,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844952963] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-19 19:14:10,688 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-19 19:14:10,688 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2021-12-19 19:14:10,688 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580982482] [2021-12-19 19:14:10,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-19 19:14:10,688 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-12-19 19:14:10,689 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-19 19:14:10,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-19 19:14:10,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-12-19 19:14:10,689 INFO L87 Difference]: Start difference. First operand 414 states and 573 transitions. cyclomatic complexity: 166 Second operand has 9 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-19 19:14:10,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 19:14:10,744 INFO L93 Difference]: Finished difference Result 384 states and 501 transitions. [2021-12-19 19:14:10,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-19 19:14:10,744 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 384 states and 501 transitions. [2021-12-19 19:14:10,747 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 38 [2021-12-19 19:14:10,750 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 384 states to 359 states and 475 transitions. [2021-12-19 19:14:10,750 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 221 [2021-12-19 19:14:10,750 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 222 [2021-12-19 19:14:10,750 INFO L73 IsDeterministic]: Start isDeterministic. Operand 359 states and 475 transitions. [2021-12-19 19:14:10,750 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-12-19 19:14:10,750 INFO L681 BuchiCegarLoop]: Abstraction has 359 states and 475 transitions. [2021-12-19 19:14:10,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states and 475 transitions. [2021-12-19 19:14:10,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 344. [2021-12-19 19:14:10,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 227 states have (on average 1.1629955947136563) internal successors, (264), 244 states have internal predecessors, (264), 65 states have call successors, (66), 50 states have call predecessors, (66), 52 states have return successors, (119), 49 states have call predecessors, (119), 63 states have call successors, (119) [2021-12-19 19:14:10,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 449 transitions. [2021-12-19 19:14:10,758 INFO L704 BuchiCegarLoop]: Abstraction has 344 states and 449 transitions. [2021-12-19 19:14:10,758 INFO L587 BuchiCegarLoop]: Abstraction has 344 states and 449 transitions. [2021-12-19 19:14:10,758 INFO L425 BuchiCegarLoop]: ======== Iteration 6============ [2021-12-19 19:14:10,758 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 344 states and 449 transitions. [2021-12-19 19:14:10,759 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 38 [2021-12-19 19:14:10,759 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-19 19:14:10,759 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-19 19:14:10,761 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [6, 5, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-19 19:14:10,761 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-19 19:14:10,761 INFO L791 eck$LassoCheckResult]: Stem: 6590#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(18, 2);call #Ultimate.allocInit(12, 3); 6591#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~ret8#1, main_~x~0#1, main_~result~0#1;main_~x~0#1 := 8; 6621#L39 call main_#t~ret8#1 := fibo1(main_~x~0#1);< 6659#fibo1ENTRY ~n := #in~n; 6773#L10 assume !(~n < 1); 6772#L12 assume !(1 == ~n); 6768#L15 call #t~ret4 := fibo2(~n - 1);< 6771#fibo2ENTRY ~n := #in~n; 6770#L20 assume !(~n < 1); 6769#L22 assume !(1 == ~n); 6759#L25 call #t~ret6 := fibo1(~n - 1);< 6767#fibo1ENTRY ~n := #in~n; 6766#L10 assume !(~n < 1); 6765#L12 assume !(1 == ~n); 6755#L15 call #t~ret4 := fibo2(~n - 1);< 6758#fibo2ENTRY ~n := #in~n; 6757#L20 assume !(~n < 1); 6756#L22 assume !(1 == ~n); 6741#L25 call #t~ret6 := fibo1(~n - 1);< 6754#fibo1ENTRY ~n := #in~n; 6753#L10 assume !(~n < 1); 6752#L12 assume !(1 == ~n); 6698#L15 call #t~ret4 := fibo2(~n - 1);< 6678#fibo2ENTRY ~n := #in~n; 6738#L20 assume !(~n < 1); 6736#L22 assume !(1 == ~n); 6629#L25 call #t~ret6 := fibo1(~n - 1);< 6749#fibo1ENTRY ~n := #in~n; 6747#L10 assume !(~n < 1); 6745#L12 assume !(1 == ~n); 6677#L15 call #t~ret4 := fibo2(~n - 1);< 6678#fibo2ENTRY ~n := #in~n; 6738#L20 assume !(~n < 1); 6736#L22 assume !(1 == ~n); 6629#L25 call #t~ret6 := fibo1(~n - 1);< 6749#fibo1ENTRY ~n := #in~n; 6750#L10 assume !(~n < 1); 6764#L12 assume 1 == ~n;#res := 1; 6902#fibo1FINAL assume true; 6898#fibo1EXIT >#46#return; 6899#L25-1 call #t~ret7 := fibo1(~n - 2);< 6910#fibo1ENTRY ~n := #in~n; 6912#L10 assume ~n < 1;#res := 0; 6909#fibo1FINAL assume true; 6907#fibo1EXIT >#48#return; 6891#L25-2 #res := #t~ret6 + #t~ret7;havoc #t~ret6;havoc #t~ret7; 6889#fibo2FINAL assume true; 6825#fibo2EXIT >#50#return; 6796#L15-1 [2021-12-19 19:14:10,761 INFO L793 eck$LassoCheckResult]: Loop: 6796#L15-1 call #t~ret5 := fibo2(~n - 2);< 6801#fibo2ENTRY ~n := #in~n; 6826#L20 assume !(~n < 1); 6823#L22 assume !(1 == ~n); 6817#L25 call #t~ret6 := fibo1(~n - 1);< 6821#fibo1ENTRY ~n := #in~n; 6859#L10 assume !(~n < 1); 6856#L12 assume !(1 == ~n); 6805#L15 call #t~ret4 := fibo2(~n - 1);< 6833#fibo2ENTRY ~n := #in~n; 6826#L20 assume !(~n < 1); 6823#L22 assume !(1 == ~n); 6817#L25 call #t~ret6 := fibo1(~n - 1);< 6821#fibo1ENTRY ~n := #in~n; 6859#L10 assume !(~n < 1); 6856#L12 assume !(1 == ~n); 6805#L15 call #t~ret4 := fibo2(~n - 1);< 6833#fibo2ENTRY ~n := #in~n; 6834#L20 assume !(~n < 1); 6852#L22 assume 1 == ~n;#res := 1; 6850#fibo2FINAL assume true; 6831#fibo2EXIT >#50#return; 6796#L15-1 call #t~ret5 := fibo2(~n - 2);< 6801#fibo2ENTRY ~n := #in~n; 6835#L20 assume ~n < 1;#res := 0; 6876#fibo2FINAL assume true; 6824#fibo2EXIT >#52#return; 6800#L15-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 6820#fibo1FINAL assume true; 6812#fibo1EXIT >#46#return; 6814#L25-1 call #t~ret7 := fibo1(~n - 2);< 6819#fibo1ENTRY ~n := #in~n; 6857#L10 assume ~n < 1;#res := 0; 6858#fibo1FINAL assume true; 6842#fibo1EXIT >#48#return; 6840#L25-2 #res := #t~ret6 + #t~ret7;havoc #t~ret6;havoc #t~ret7; 6838#fibo2FINAL assume true; 6803#fibo2EXIT >#50#return; 6796#L15-1 [2021-12-19 19:14:10,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 19:14:10,762 INFO L85 PathProgramCache]: Analyzing trace with hash -1654199334, now seen corresponding path program 1 times [2021-12-19 19:14:10,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 19:14:10,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513539915] [2021-12-19 19:14:10,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 19:14:10,762 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 19:14:10,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 19:14:10,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-19 19:14:10,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 19:14:10,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-19 19:14:10,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 19:14:10,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-19 19:14:10,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 19:14:10,923 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 36 proven. 32 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-19 19:14:10,923 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 19:14:10,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513539915] [2021-12-19 19:14:10,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513539915] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-19 19:14:10,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682918361] [2021-12-19 19:14:10,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 19:14:10,924 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 19:14:10,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 19:14:10,928 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-19 19:14:10,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-12-19 19:14:10,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 19:14:10,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-19 19:14:10,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 19:14:11,062 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 36 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-19 19:14:11,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-19 19:14:11,238 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 36 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-19 19:14:11,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682918361] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-19 19:14:11,238 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-19 19:14:11,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 25 [2021-12-19 19:14:11,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083391172] [2021-12-19 19:14:11,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-19 19:14:11,239 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-12-19 19:14:11,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 19:14:11,239 INFO L85 PathProgramCache]: Analyzing trace with hash 1513837346, now seen corresponding path program 1 times [2021-12-19 19:14:11,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 19:14:11,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799547082] [2021-12-19 19:14:11,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 19:14:11,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 19:14:11,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 19:14:11,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-19 19:14:11,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 19:14:11,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-19 19:14:11,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 19:14:11,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-19 19:14:11,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 19:14:11,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-19 19:14:11,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 19:14:11,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-19 19:14:11,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 19:14:11,294 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-19 19:14:11,294 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 19:14:11,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799547082] [2021-12-19 19:14:11,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799547082] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-19 19:14:11,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259347523] [2021-12-19 19:14:11,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 19:14:11,295 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 19:14:11,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 19:14:11,296 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-19 19:14:11,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-12-19 19:14:11,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 19:14:11,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-19 19:14:11,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 19:14:11,406 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 13 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-19 19:14:11,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-19 19:14:11,587 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 13 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-19 19:14:11,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259347523] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-19 19:14:11,587 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-19 19:14:11,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 15 [2021-12-19 19:14:11,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543360866] [2021-12-19 19:14:11,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-19 19:14:11,588 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-12-19 19:14:11,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-19 19:14:11,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-19 19:14:11,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-12-19 19:14:11,588 INFO L87 Difference]: Start difference. First operand 344 states and 449 transitions. cyclomatic complexity: 111 Second operand has 15 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 14 states have internal predecessors, (34), 6 states have call successors, (9), 1 states have call predecessors, (9), 5 states have return successors, (8), 4 states have call predecessors, (8), 6 states have call successors, (8) [2021-12-19 19:14:11,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 19:14:11,693 INFO L93 Difference]: Finished difference Result 360 states and 459 transitions. [2021-12-19 19:14:11,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-19 19:14:11,694 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 360 states and 459 transitions. [2021-12-19 19:14:11,696 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 40 [2021-12-19 19:14:11,699 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 360 states to 360 states and 459 transitions. [2021-12-19 19:14:11,699 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 217 [2021-12-19 19:14:11,699 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 217 [2021-12-19 19:14:11,699 INFO L73 IsDeterministic]: Start isDeterministic. Operand 360 states and 459 transitions. [2021-12-19 19:14:11,699 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-12-19 19:14:11,699 INFO L681 BuchiCegarLoop]: Abstraction has 360 states and 459 transitions. [2021-12-19 19:14:11,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states and 459 transitions. [2021-12-19 19:14:11,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 321. [2021-12-19 19:14:11,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 213 states have (on average 1.1737089201877935) internal successors, (250), 230 states have internal predecessors, (250), 61 states have call successors, (62), 46 states have call predecessors, (62), 47 states have return successors, (98), 44 states have call predecessors, (98), 59 states have call successors, (98) [2021-12-19 19:14:11,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 410 transitions. [2021-12-19 19:14:11,706 INFO L704 BuchiCegarLoop]: Abstraction has 321 states and 410 transitions. [2021-12-19 19:14:11,706 INFO L587 BuchiCegarLoop]: Abstraction has 321 states and 410 transitions. [2021-12-19 19:14:11,706 INFO L425 BuchiCegarLoop]: ======== Iteration 7============ [2021-12-19 19:14:11,706 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 321 states and 410 transitions. [2021-12-19 19:14:11,707 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 38 [2021-12-19 19:14:11,707 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-19 19:14:11,707 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-19 19:14:11,708 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [6, 5, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-19 19:14:11,708 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-19 19:14:11,708 INFO L791 eck$LassoCheckResult]: Stem: 7933#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(18, 2);call #Ultimate.allocInit(12, 3); 7934#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~ret8#1, main_~x~0#1, main_~result~0#1;main_~x~0#1 := 8; 7963#L39 call main_#t~ret8#1 := fibo1(main_~x~0#1);< 8007#fibo1ENTRY ~n := #in~n; 8110#L10 assume !(~n < 1); 8109#L12 assume !(1 == ~n); 8105#L15 call #t~ret4 := fibo2(~n - 1);< 8108#fibo2ENTRY ~n := #in~n; 8107#L20 assume !(~n < 1); 8106#L22 assume !(1 == ~n); 8101#L25 call #t~ret6 := fibo1(~n - 1);< 8104#fibo1ENTRY ~n := #in~n; 8103#L10 assume !(~n < 1); 8102#L12 assume !(1 == ~n); 8097#L15 call #t~ret4 := fibo2(~n - 1);< 8100#fibo2ENTRY ~n := #in~n; 8099#L20 assume !(~n < 1); 8098#L22 assume !(1 == ~n); 8093#L25 call #t~ret6 := fibo1(~n - 1);< 8096#fibo1ENTRY ~n := #in~n; 8095#L10 assume !(~n < 1); 8094#L12 assume !(1 == ~n); 8016#L15 call #t~ret4 := fibo2(~n - 1);< 8018#fibo2ENTRY ~n := #in~n; 8092#L20 assume !(~n < 1); 8079#L22 assume !(1 == ~n); 7977#L25 call #t~ret6 := fibo1(~n - 1);< 8041#fibo1ENTRY ~n := #in~n; 8075#L10 assume !(~n < 1); 8076#L12 assume !(1 == ~n); 8017#L15 call #t~ret4 := fibo2(~n - 1);< 8018#fibo2ENTRY ~n := #in~n; 8092#L20 assume !(~n < 1); 8079#L22 assume !(1 == ~n); 7977#L25 call #t~ret6 := fibo1(~n - 1);< 8041#fibo1ENTRY ~n := #in~n; 8077#L10 assume !(~n < 1); 8088#L12 assume 1 == ~n;#res := 1; 8252#fibo1FINAL assume true; 8251#fibo1EXIT >#46#return; 7942#L25-1 call #t~ret7 := fibo1(~n - 2);< 8216#fibo1ENTRY ~n := #in~n; 8253#L10 assume ~n < 1;#res := 0; 7941#fibo1FINAL assume true; 7943#fibo1EXIT >#48#return; 8214#L25-2 #res := #t~ret6 + #t~ret7;havoc #t~ret6;havoc #t~ret7; 8213#fibo2FINAL assume true; 8117#fibo2EXIT >#50#return; 8118#L15-1 [2021-12-19 19:14:11,708 INFO L793 eck$LassoCheckResult]: Loop: 8118#L15-1 call #t~ret5 := fibo2(~n - 2);< 8129#fibo2ENTRY ~n := #in~n; 8173#L20 assume !(~n < 1); 8152#L22 assume !(1 == ~n); 8143#L25 call #t~ret6 := fibo1(~n - 1);< 8150#fibo1ENTRY ~n := #in~n; 8188#L10 assume !(~n < 1); 8185#L12 assume !(1 == ~n); 8125#L15 call #t~ret4 := fibo2(~n - 1);< 8137#fibo2ENTRY ~n := #in~n; 8183#L20 assume !(~n < 1); 8178#L22 assume !(1 == ~n); 8179#L25 call #t~ret6 := fibo1(~n - 1);< 8203#fibo1ENTRY ~n := #in~n; 8206#L10 assume !(~n < 1); 8205#L12 assume 1 == ~n;#res := 1; 8204#fibo1FINAL assume true; 8202#fibo1EXIT >#46#return; 8147#L25-1 call #t~ret7 := fibo1(~n - 2);< 8181#fibo1ENTRY ~n := #in~n; 8224#L10 assume ~n < 1;#res := 0; 8155#fibo1FINAL assume true; 8180#fibo1EXIT >#48#return; 8177#L25-2 #res := #t~ret6 + #t~ret7;havoc #t~ret6;havoc #t~ret7; 8175#fibo2FINAL assume true; 8164#fibo2EXIT >#50#return; 8118#L15-1 [2021-12-19 19:14:11,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 19:14:11,709 INFO L85 PathProgramCache]: Analyzing trace with hash -1654199334, now seen corresponding path program 2 times [2021-12-19 19:14:11,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 19:14:11,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549820336] [2021-12-19 19:14:11,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 19:14:11,709 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 19:14:11,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 19:14:11,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-12-19 19:14:11,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 19:14:11,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-19 19:14:11,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 19:14:11,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-19 19:14:11,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 19:14:11,864 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 36 proven. 32 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-19 19:14:11,864 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 19:14:11,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549820336] [2021-12-19 19:14:11,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549820336] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-19 19:14:11,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230601505] [2021-12-19 19:14:11,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-19 19:14:11,864 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 19:14:11,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 19:14:11,865 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-19 19:14:11,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-12-19 19:14:11,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-19 19:14:11,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-19 19:14:11,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-19 19:14:11,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 19:14:12,005 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 36 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-19 19:14:12,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-19 19:14:12,177 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 36 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-19 19:14:12,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230601505] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-19 19:14:12,178 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-19 19:14:12,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 25 [2021-12-19 19:14:12,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657657627] [2021-12-19 19:14:12,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-19 19:14:12,178 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-12-19 19:14:12,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 19:14:12,179 INFO L85 PathProgramCache]: Analyzing trace with hash 1626884941, now seen corresponding path program 2 times [2021-12-19 19:14:12,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 19:14:12,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064336215] [2021-12-19 19:14:12,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 19:14:12,179 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 19:14:12,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-19 19:14:12,182 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-19 19:14:12,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-19 19:14:12,185 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-19 19:14:12,383 INFO L210 LassoAnalysis]: Preferences: [2021-12-19 19:14:12,383 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-19 19:14:12,383 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-19 19:14:12,383 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-19 19:14:12,383 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-12-19 19:14:12,383 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 19:14:12,383 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-19 19:14:12,383 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-19 19:14:12,383 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_8-1.c_Iteration7_Loop [2021-12-19 19:14:12,383 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-19 19:14:12,383 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-19 19:14:12,383 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:12,387 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:12,388 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:12,389 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:12,390 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:12,394 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:12,398 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:12,399 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:12,402 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:12,436 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-19 19:14:12,436 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-12-19 19:14:12,436 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 19:14:12,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 19:14:12,437 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-19 19:14:12,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (64)] Waiting until timeout for monitored process [2021-12-19 19:14:12,439 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-19 19:14:12,439 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-19 19:14:12,445 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-19 19:14:12,445 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#t~ret6=0} Honda state: {fibo2_#t~ret6=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-12-19 19:14:12,459 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (64)] Ended with exit code 0 [2021-12-19 19:14:12,459 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 19:14:12,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 19:14:12,460 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-19 19:14:12,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (65)] Waiting until timeout for monitored process [2021-12-19 19:14:12,463 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-19 19:14:12,464 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-19 19:14:12,469 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-19 19:14:12,469 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#t~ret5=0} Honda state: {fibo1_#t~ret5=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-12-19 19:14:12,483 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (65)] Forceful destruction successful, exit code 0 [2021-12-19 19:14:12,484 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 19:14:12,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 19:14:12,484 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-19 19:14:12,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (66)] Waiting until timeout for monitored process [2021-12-19 19:14:12,486 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-19 19:14:12,486 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-19 19:14:12,492 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-19 19:14:12,492 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_~n=0} Honda state: {fibo2_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-12-19 19:14:12,507 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (66)] Ended with exit code 0 [2021-12-19 19:14:12,507 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 19:14:12,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 19:14:12,508 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-19 19:14:12,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (67)] Waiting until timeout for monitored process [2021-12-19 19:14:12,510 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-19 19:14:12,510 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-19 19:14:12,515 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-19 19:14:12,516 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#res=0} Honda state: {fibo1_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-12-19 19:14:12,530 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (67)] Forceful destruction successful, exit code 0 [2021-12-19 19:14:12,530 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 19:14:12,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 19:14:12,531 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-19 19:14:12,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (68)] Waiting until timeout for monitored process [2021-12-19 19:14:12,533 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-19 19:14:12,533 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-19 19:14:12,553 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (68)] Forceful destruction successful, exit code 0 [2021-12-19 19:14:12,553 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 19:14:12,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 19:14:12,554 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-19 19:14:12,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (69)] Waiting until timeout for monitored process [2021-12-19 19:14:12,559 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-12-19 19:14:12,559 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-19 19:14:13,163 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-12-19 19:14:13,166 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (69)] Ended with exit code 0 [2021-12-19 19:14:13,166 INFO L210 LassoAnalysis]: Preferences: [2021-12-19 19:14:13,166 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-19 19:14:13,166 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-19 19:14:13,166 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-19 19:14:13,166 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-12-19 19:14:13,166 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 19:14:13,166 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-19 19:14:13,166 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-19 19:14:13,166 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_8-1.c_Iteration7_Loop [2021-12-19 19:14:13,166 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-19 19:14:13,166 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-19 19:14:13,167 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:13,169 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:13,170 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:13,171 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:13,172 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:13,177 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:13,178 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:13,179 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:13,180 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:13,209 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-19 19:14:13,209 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-12-19 19:14:13,209 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 19:14:13,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 19:14:13,210 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-19 19:14:13,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (70)] Waiting until timeout for monitored process [2021-12-19 19:14:13,212 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-12-19 19:14:13,217 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-19 19:14:13,217 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-19 19:14:13,217 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-19 19:14:13,217 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-19 19:14:13,217 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-19 19:14:13,217 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-19 19:14:13,217 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-19 19:14:13,218 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-19 19:14:13,233 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (70)] Ended with exit code 0 [2021-12-19 19:14:13,243 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 19:14:13,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 19:14:13,244 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-19 19:14:13,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (71)] Waiting until timeout for monitored process [2021-12-19 19:14:13,246 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-12-19 19:14:13,251 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-19 19:14:13,251 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-19 19:14:13,251 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-19 19:14:13,251 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-19 19:14:13,251 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-19 19:14:13,252 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-19 19:14:13,252 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-19 19:14:13,252 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-19 19:14:13,267 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (71)] Forceful destruction successful, exit code 0 [2021-12-19 19:14:13,267 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 19:14:13,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 19:14:13,268 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-19 19:14:13,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (72)] Waiting until timeout for monitored process [2021-12-19 19:14:13,270 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-12-19 19:14:13,275 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-19 19:14:13,275 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-19 19:14:13,275 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-19 19:14:13,275 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-19 19:14:13,275 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-19 19:14:13,275 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-19 19:14:13,276 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-19 19:14:13,276 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-19 19:14:13,290 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (72)] Ended with exit code 0 [2021-12-19 19:14:13,291 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 19:14:13,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 19:14:13,291 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-19 19:14:13,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (73)] Waiting until timeout for monitored process [2021-12-19 19:14:13,293 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-12-19 19:14:13,298 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-19 19:14:13,298 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-19 19:14:13,298 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-19 19:14:13,298 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-19 19:14:13,298 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-19 19:14:13,298 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-19 19:14:13,298 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-19 19:14:13,303 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-19 19:14:13,317 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (73)] Ended with exit code 0 [2021-12-19 19:14:13,318 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 19:14:13,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 19:14:13,318 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-19 19:14:13,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (74)] Waiting until timeout for monitored process [2021-12-19 19:14:13,320 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-12-19 19:14:13,325 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-19 19:14:13,325 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-19 19:14:13,325 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-19 19:14:13,325 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-19 19:14:13,325 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-19 19:14:13,326 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-19 19:14:13,326 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-19 19:14:13,328 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-12-19 19:14:13,329 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2021-12-19 19:14:13,329 INFO L444 ModelExtractionUtils]: 2 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. [2021-12-19 19:14:13,329 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 19:14:13,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 19:14:13,330 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-19 19:14:13,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (75)] Waiting until timeout for monitored process [2021-12-19 19:14:13,332 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-12-19 19:14:13,332 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-12-19 19:14:13,332 INFO L513 LassoAnalysis]: Proved termination. [2021-12-19 19:14:13,332 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo1_~n) = 1*fibo1_~n Supporting invariants [] [2021-12-19 19:14:13,346 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (74)] Forceful destruction successful, exit code 0 [2021-12-19 19:14:13,347 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-12-19 19:14:13,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 19:14:13,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 19:14:13,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-19 19:14:13,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 19:14:13,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (75)] Forceful destruction successful, exit code 0 [2021-12-19 19:14:13,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 19:14:13,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-19 19:14:13,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 19:14:13,823 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-19 19:14:13,824 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 10 loop predicates [2021-12-19 19:14:13,824 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 321 states and 410 transitions. cyclomatic complexity: 95 Second operand has 12 states, 11 states have (on average 3.272727272727273) internal successors, (36), 9 states have internal predecessors, (36), 7 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-19 19:14:14,097 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 321 states and 410 transitions. cyclomatic complexity: 95. Second operand has 12 states, 11 states have (on average 3.272727272727273) internal successors, (36), 9 states have internal predecessors, (36), 7 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) Result 1107 states and 1416 transitions. Complement of second has 46 states. [2021-12-19 19:14:14,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 13 states 2 stem states 10 non-accepting loop states 1 accepting loop states [2021-12-19 19:14:14,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 3.272727272727273) internal successors, (36), 9 states have internal predecessors, (36), 7 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-19 19:14:14,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 68 transitions. [2021-12-19 19:14:14,098 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 13 states and 68 transitions. Stem has 48 letters. Loop has 26 letters. [2021-12-19 19:14:14,099 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-19 19:14:14,099 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 13 states and 68 transitions. Stem has 74 letters. Loop has 26 letters. [2021-12-19 19:14:14,099 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-19 19:14:14,099 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 13 states and 68 transitions. Stem has 48 letters. Loop has 52 letters. [2021-12-19 19:14:14,100 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-19 19:14:14,100 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1107 states and 1416 transitions. [2021-12-19 19:14:14,107 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 86 [2021-12-19 19:14:14,114 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1107 states to 1020 states and 1321 transitions. [2021-12-19 19:14:14,114 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 429 [2021-12-19 19:14:14,115 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 453 [2021-12-19 19:14:14,115 INFO L73 IsDeterministic]: Start isDeterministic. Operand 1020 states and 1321 transitions. [2021-12-19 19:14:14,115 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-12-19 19:14:14,115 INFO L681 BuchiCegarLoop]: Abstraction has 1020 states and 1321 transitions. [2021-12-19 19:14:14,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1020 states and 1321 transitions. [2021-12-19 19:14:14,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1020 to 963. [2021-12-19 19:14:14,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 631 states have (on average 1.1933438985736926) internal successors, (753), 691 states have internal predecessors, (753), 184 states have call successors, (190), 132 states have call predecessors, (190), 148 states have return successors, (305), 139 states have call predecessors, (305), 182 states have call successors, (305) [2021-12-19 19:14:14,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 1248 transitions. [2021-12-19 19:14:14,132 INFO L704 BuchiCegarLoop]: Abstraction has 963 states and 1248 transitions. [2021-12-19 19:14:14,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-19 19:14:14,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-19 19:14:14,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2021-12-19 19:14:14,133 INFO L87 Difference]: Start difference. First operand 963 states and 1248 transitions. Second operand has 26 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 18 states have internal predecessors, (45), 12 states have call successors, (13), 8 states have call predecessors, (13), 3 states have return successors, (6), 3 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-19 19:14:14,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 19:14:14,666 INFO L93 Difference]: Finished difference Result 1028 states and 1212 transitions. [2021-12-19 19:14:14,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-19 19:14:14,666 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1028 states and 1212 transitions. [2021-12-19 19:14:14,672 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 90 [2021-12-19 19:14:14,675 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1028 states to 450 states and 523 transitions. [2021-12-19 19:14:14,675 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 289 [2021-12-19 19:14:14,675 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 289 [2021-12-19 19:14:14,676 INFO L73 IsDeterministic]: Start isDeterministic. Operand 450 states and 523 transitions. [2021-12-19 19:14:14,676 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-12-19 19:14:14,676 INFO L681 BuchiCegarLoop]: Abstraction has 450 states and 523 transitions. [2021-12-19 19:14:14,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states and 523 transitions. [2021-12-19 19:14:14,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 402. [2021-12-19 19:14:14,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 266 states have (on average 1.112781954887218) internal successors, (296), 283 states have internal predecessors, (296), 83 states have call successors, (84), 63 states have call predecessors, (84), 53 states have return successors, (88), 55 states have call predecessors, (88), 66 states have call successors, (88) [2021-12-19 19:14:14,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 468 transitions. [2021-12-19 19:14:14,683 INFO L704 BuchiCegarLoop]: Abstraction has 402 states and 468 transitions. [2021-12-19 19:14:14,683 INFO L587 BuchiCegarLoop]: Abstraction has 402 states and 468 transitions. [2021-12-19 19:14:14,683 INFO L425 BuchiCegarLoop]: ======== Iteration 8============ [2021-12-19 19:14:14,683 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 402 states and 468 transitions. [2021-12-19 19:14:14,685 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 64 [2021-12-19 19:14:14,685 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-19 19:14:14,685 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-19 19:14:14,686 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [6, 5, 5, 5, 5, 5, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-19 19:14:14,686 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-19 19:14:14,686 INFO L791 eck$LassoCheckResult]: Stem: 12047#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(18, 2);call #Ultimate.allocInit(12, 3); 12048#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~ret8#1, main_~x~0#1, main_~result~0#1;main_~x~0#1 := 8; 12076#L39 call main_#t~ret8#1 := fibo1(main_~x~0#1);< 12112#fibo1ENTRY ~n := #in~n; 12188#L10 assume !(~n < 1); 12187#L12 assume !(1 == ~n); 12183#L15 call #t~ret4 := fibo2(~n - 1);< 12186#fibo2ENTRY ~n := #in~n; 12185#L20 assume !(~n < 1); 12184#L22 assume !(1 == ~n); 12179#L25 call #t~ret6 := fibo1(~n - 1);< 12182#fibo1ENTRY ~n := #in~n; 12181#L10 assume !(~n < 1); 12180#L12 assume !(1 == ~n); 12175#L15 call #t~ret4 := fibo2(~n - 1);< 12178#fibo2ENTRY ~n := #in~n; 12177#L20 assume !(~n < 1); 12176#L22 assume !(1 == ~n); 12170#L25 call #t~ret6 := fibo1(~n - 1);< 12174#fibo1ENTRY ~n := #in~n; 12173#L10 assume !(~n < 1); 12172#L12 assume !(1 == ~n); 12106#L15 call #t~ret4 := fibo2(~n - 1);< 12171#fibo2ENTRY ~n := #in~n; 12212#L20 assume !(~n < 1); 12210#L22 assume !(1 == ~n); 12155#L25 call #t~ret6 := fibo1(~n - 1);< 12215#fibo1ENTRY ~n := #in~n; 12216#L10 assume !(~n < 1); 12230#L12 assume !(1 == ~n); 12226#L15 call #t~ret4 := fibo2(~n - 1);< 12227#fibo2ENTRY ~n := #in~n; 12232#L20 assume !(~n < 1); 12231#L22 assume 1 == ~n;#res := 1; 12229#fibo2FINAL assume true; 12225#fibo2EXIT >#50#return; 12222#L15-1 call #t~ret5 := fibo2(~n - 2);< 12223#fibo2ENTRY ~n := #in~n; 12228#L20 assume ~n < 1;#res := 0; 12224#fibo2FINAL assume true; 12221#fibo2EXIT >#52#return; 12220#L15-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 12219#fibo1FINAL assume true; 12154#fibo1EXIT >#46#return; 12139#L25-1 call #t~ret7 := fibo1(~n - 2);< 12068#fibo1ENTRY ~n := #in~n; 12138#L10 assume !(~n < 1); 12140#L12 assume !(1 == ~n); 12067#L15 call #t~ret4 := fibo2(~n - 1);< 12132#fibo2ENTRY ~n := #in~n; 12133#L20 assume !(~n < 1); 12122#L22 assume 1 == ~n;#res := 1; 12123#fibo2FINAL assume true; 12274#fibo2EXIT >#50#return; 12085#L15-1 [2021-12-19 19:14:14,686 INFO L793 eck$LassoCheckResult]: Loop: 12085#L15-1 call #t~ret5 := fibo2(~n - 2);< 12272#fibo2ENTRY ~n := #in~n; 12302#L20 assume !(~n < 1); 12264#L22 assume !(1 == ~n); 12251#L25 call #t~ret6 := fibo1(~n - 1);< 12259#fibo1ENTRY ~n := #in~n; 12289#L10 assume !(~n < 1); 12282#L12 assume !(1 == ~n); 12089#L15 call #t~ret4 := fibo2(~n - 1);< 12279#fibo2ENTRY ~n := #in~n; 12303#L20 assume !(~n < 1); 12376#L22 assume 1 == ~n;#res := 1; 12375#fibo2FINAL assume true; 12277#fibo2EXIT >#50#return; 12085#L15-1 [2021-12-19 19:14:14,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 19:14:14,686 INFO L85 PathProgramCache]: Analyzing trace with hash 628833608, now seen corresponding path program 1 times [2021-12-19 19:14:14,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 19:14:14,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431575963] [2021-12-19 19:14:14,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 19:14:14,691 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 19:14:14,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 19:14:14,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-19 19:14:14,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 19:14:14,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-19 19:14:14,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 19:14:14,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-19 19:14:14,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 19:14:14,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-19 19:14:14,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 19:14:14,830 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 40 proven. 36 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-19 19:14:14,830 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 19:14:14,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431575963] [2021-12-19 19:14:14,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431575963] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-19 19:14:14,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74956247] [2021-12-19 19:14:14,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 19:14:14,830 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 19:14:14,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 19:14:14,831 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-19 19:14:14,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2021-12-19 19:14:14,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 19:14:14,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-19 19:14:14,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 19:14:14,970 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 47 proven. 36 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-19 19:14:14,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-19 19:14:15,120 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 47 proven. 36 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-19 19:14:15,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74956247] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-19 19:14:15,121 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-19 19:14:15,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 21 [2021-12-19 19:14:15,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571545250] [2021-12-19 19:14:15,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-19 19:14:15,121 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-12-19 19:14:15,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 19:14:15,122 INFO L85 PathProgramCache]: Analyzing trace with hash -1489002864, now seen corresponding path program 1 times [2021-12-19 19:14:15,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 19:14:15,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459456447] [2021-12-19 19:14:15,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 19:14:15,122 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 19:14:15,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-19 19:14:15,125 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-19 19:14:15,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-19 19:14:15,126 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-19 19:14:15,261 INFO L210 LassoAnalysis]: Preferences: [2021-12-19 19:14:15,261 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-19 19:14:15,261 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-19 19:14:15,261 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-19 19:14:15,261 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-12-19 19:14:15,261 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 19:14:15,261 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-19 19:14:15,261 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-19 19:14:15,261 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_8-1.c_Iteration8_Loop [2021-12-19 19:14:15,261 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-19 19:14:15,261 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-19 19:14:15,262 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:15,263 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:15,265 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:15,266 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:15,272 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:15,273 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:15,275 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:15,277 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:15,279 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:15,310 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-19 19:14:15,310 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-12-19 19:14:15,310 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 19:14:15,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 19:14:15,311 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-19 19:14:15,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (77)] Waiting until timeout for monitored process [2021-12-19 19:14:15,313 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-19 19:14:15,313 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-19 19:14:15,334 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-19 19:14:15,334 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#t~ret5=0} Honda state: {fibo1_#t~ret5=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-12-19 19:14:15,349 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (77)] Forceful destruction successful, exit code 0 [2021-12-19 19:14:15,349 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 19:14:15,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 19:14:15,350 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-19 19:14:15,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (78)] Waiting until timeout for monitored process [2021-12-19 19:14:15,352 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-19 19:14:15,352 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-19 19:14:15,373 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-19 19:14:15,373 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#t~ret6=0} Honda state: {fibo2_#t~ret6=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-12-19 19:14:15,388 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (78)] Forceful destruction successful, exit code 0 [2021-12-19 19:14:15,388 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 19:14:15,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 19:14:15,389 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-19 19:14:15,392 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-19 19:14:15,392 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-19 19:14:15,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (79)] Waiting until timeout for monitored process [2021-12-19 19:14:15,397 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-19 19:14:15,398 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_~n=0} Honda state: {fibo2_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-12-19 19:14:15,412 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (79)] Ended with exit code 0 [2021-12-19 19:14:15,412 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 19:14:15,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 19:14:15,413 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-19 19:14:15,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (80)] Waiting until timeout for monitored process [2021-12-19 19:14:15,414 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-19 19:14:15,414 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-19 19:14:15,434 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (80)] Ended with exit code 0 [2021-12-19 19:14:15,434 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 19:14:15,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 19:14:15,435 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-19 19:14:15,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (81)] Waiting until timeout for monitored process [2021-12-19 19:14:15,437 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-12-19 19:14:15,437 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-19 19:14:16,387 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-12-19 19:14:16,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (81)] Forceful destruction successful, exit code 0 [2021-12-19 19:14:16,391 INFO L210 LassoAnalysis]: Preferences: [2021-12-19 19:14:16,391 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-19 19:14:16,391 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-19 19:14:16,391 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-19 19:14:16,391 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-12-19 19:14:16,391 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 19:14:16,391 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-19 19:14:16,392 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-19 19:14:16,392 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_8-1.c_Iteration8_Loop [2021-12-19 19:14:16,392 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-19 19:14:16,392 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-19 19:14:16,392 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:16,396 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:16,397 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:16,401 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:16,402 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:16,404 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:16,405 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:16,412 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:16,413 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:16,444 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-19 19:14:16,444 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-12-19 19:14:16,444 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 19:14:16,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 19:14:16,445 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-19 19:14:16,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (82)] Waiting until timeout for monitored process [2021-12-19 19:14:16,447 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-12-19 19:14:16,452 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-19 19:14:16,452 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-19 19:14:16,452 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-19 19:14:16,452 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-19 19:14:16,452 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-19 19:14:16,452 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-19 19:14:16,453 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-19 19:14:16,453 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-19 19:14:16,468 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (82)] Forceful destruction successful, exit code 0 [2021-12-19 19:14:16,468 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 19:14:16,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 19:14:16,469 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-19 19:14:16,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (83)] Waiting until timeout for monitored process [2021-12-19 19:14:16,471 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-12-19 19:14:16,475 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-19 19:14:16,476 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-19 19:14:16,476 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-19 19:14:16,476 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-19 19:14:16,476 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-19 19:14:16,476 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-19 19:14:16,476 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-19 19:14:16,477 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-19 19:14:16,491 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (83)] Forceful destruction successful, exit code 0 [2021-12-19 19:14:16,491 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 19:14:16,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 19:14:16,492 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-19 19:14:16,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (84)] Waiting until timeout for monitored process [2021-12-19 19:14:16,494 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-12-19 19:14:16,499 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-19 19:14:16,499 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-19 19:14:16,499 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-19 19:14:16,499 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-19 19:14:16,499 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-19 19:14:16,500 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-19 19:14:16,500 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-19 19:14:16,501 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-12-19 19:14:16,503 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-12-19 19:14:16,503 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-12-19 19:14:16,504 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 19:14:16,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 19:14:16,504 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-19 19:14:16,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (85)] Waiting until timeout for monitored process [2021-12-19 19:14:16,506 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-12-19 19:14:16,506 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-12-19 19:14:16,506 INFO L513 LassoAnalysis]: Proved termination. [2021-12-19 19:14:16,506 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo1_~n) = 1*fibo1_~n Supporting invariants [] [2021-12-19 19:14:16,520 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (84)] Ended with exit code 0 [2021-12-19 19:14:16,521 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-12-19 19:14:16,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 19:14:16,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 19:14:16,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-19 19:14:16,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 19:14:16,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 19:14:16,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-19 19:14:16,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 19:14:16,929 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-19 19:14:16,929 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 [2021-12-19 19:14:16,930 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 402 states and 468 transitions. cyclomatic complexity: 74 Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 6 states have internal predecessors, (28), 5 states have call successors, (11), 5 states have call predecessors, (11), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-19 19:14:17,010 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (85)] Forceful destruction successful, exit code 0 [2021-12-19 19:14:17,153 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 402 states and 468 transitions. cyclomatic complexity: 74. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 6 states have internal predecessors, (28), 5 states have call successors, (11), 5 states have call predecessors, (11), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Result 553 states and 633 transitions. Complement of second has 40 states. [2021-12-19 19:14:17,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 12 states 2 stem states 9 non-accepting loop states 1 accepting loop states [2021-12-19 19:14:17,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 6 states have internal predecessors, (28), 5 states have call successors, (11), 5 states have call predecessors, (11), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-19 19:14:17,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 50 transitions. [2021-12-19 19:14:17,155 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 50 transitions. Stem has 54 letters. Loop has 14 letters. [2021-12-19 19:14:17,155 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-19 19:14:17,155 INFO L634 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-12-19 19:14:17,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 19:14:17,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 19:14:17,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-19 19:14:17,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 19:14:17,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 19:14:17,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-19 19:14:17,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 19:14:17,462 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-19 19:14:17,463 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 [2021-12-19 19:14:17,463 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 402 states and 468 transitions. cyclomatic complexity: 74 Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 6 states have internal predecessors, (28), 5 states have call successors, (11), 5 states have call predecessors, (11), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-19 19:14:17,611 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 402 states and 468 transitions. cyclomatic complexity: 74. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 6 states have internal predecessors, (28), 5 states have call successors, (11), 5 states have call predecessors, (11), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Result 475 states and 545 transitions. Complement of second has 26 states. [2021-12-19 19:14:17,612 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 [2021-12-19 19:14:17,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 6 states have internal predecessors, (28), 5 states have call successors, (11), 5 states have call predecessors, (11), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-19 19:14:17,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 31 transitions. [2021-12-19 19:14:17,613 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 31 transitions. Stem has 54 letters. Loop has 14 letters. [2021-12-19 19:14:17,613 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-19 19:14:17,613 INFO L634 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-12-19 19:14:17,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 19:14:17,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 19:14:17,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-19 19:14:17,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 19:14:17,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 19:14:17,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-19 19:14:17,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 19:14:18,018 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-19 19:14:18,019 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 [2021-12-19 19:14:18,019 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 402 states and 468 transitions. cyclomatic complexity: 74 Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 6 states have internal predecessors, (28), 5 states have call successors, (11), 5 states have call predecessors, (11), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-19 19:14:18,254 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 402 states and 468 transitions. cyclomatic complexity: 74. Second operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 6 states have internal predecessors, (28), 5 states have call successors, (11), 5 states have call predecessors, (11), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Result 1507 states and 1740 transitions. Complement of second has 102 states. [2021-12-19 19:14:18,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 12 states 2 stem states 9 non-accepting loop states 1 accepting loop states [2021-12-19 19:14:18,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 3.111111111111111) internal successors, (28), 6 states have internal predecessors, (28), 5 states have call successors, (11), 5 states have call predecessors, (11), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-19 19:14:18,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 72 transitions. [2021-12-19 19:14:18,255 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 72 transitions. Stem has 54 letters. Loop has 14 letters. [2021-12-19 19:14:18,255 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-19 19:14:18,255 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 72 transitions. Stem has 68 letters. Loop has 14 letters. [2021-12-19 19:14:18,256 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-19 19:14:18,256 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 72 transitions. Stem has 54 letters. Loop has 28 letters. [2021-12-19 19:14:18,256 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-19 19:14:18,256 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1507 states and 1740 transitions. [2021-12-19 19:14:18,265 INFO L131 ngComponentsAnalysis]: Automaton has 5 accepting balls. 166 [2021-12-19 19:14:18,270 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1507 states to 892 states and 1055 transitions. [2021-12-19 19:14:18,270 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 415 [2021-12-19 19:14:18,271 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 462 [2021-12-19 19:14:18,271 INFO L73 IsDeterministic]: Start isDeterministic. Operand 892 states and 1055 transitions. [2021-12-19 19:14:18,271 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-12-19 19:14:18,271 INFO L681 BuchiCegarLoop]: Abstraction has 892 states and 1055 transitions. [2021-12-19 19:14:18,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 892 states and 1055 transitions. [2021-12-19 19:14:18,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 892 to 798. [2021-12-19 19:14:18,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 798 states, 525 states have (on average 1.1123809523809525) internal successors, (584), 569 states have internal predecessors, (584), 160 states have call successors, (170), 121 states have call predecessors, (170), 113 states have return successors, (181), 107 states have call predecessors, (181), 136 states have call successors, (181) [2021-12-19 19:14:18,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 798 states to 798 states and 935 transitions. [2021-12-19 19:14:18,284 INFO L704 BuchiCegarLoop]: Abstraction has 798 states and 935 transitions. [2021-12-19 19:14:18,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-19 19:14:18,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-19 19:14:18,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-12-19 19:14:18,285 INFO L87 Difference]: Start difference. First operand 798 states and 935 transitions. Second operand has 21 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 14 states have internal predecessors, (41), 10 states have call successors, (12), 8 states have call predecessors, (12), 2 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-19 19:14:18,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 19:14:18,583 INFO L93 Difference]: Finished difference Result 617 states and 721 transitions. [2021-12-19 19:14:18,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-19 19:14:18,583 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 617 states and 721 transitions. [2021-12-19 19:14:18,586 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 40 [2021-12-19 19:14:18,589 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 617 states to 496 states and 589 transitions. [2021-12-19 19:14:18,589 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 281 [2021-12-19 19:14:18,589 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 305 [2021-12-19 19:14:18,589 INFO L73 IsDeterministic]: Start isDeterministic. Operand 496 states and 589 transitions. [2021-12-19 19:14:18,589 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-12-19 19:14:18,589 INFO L681 BuchiCegarLoop]: Abstraction has 496 states and 589 transitions. [2021-12-19 19:14:18,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states and 589 transitions. [2021-12-19 19:14:18,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 491. [2021-12-19 19:14:18,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 320 states have (on average 1.1125) internal successors, (356), 350 states have internal predecessors, (356), 97 states have call successors, (103), 69 states have call predecessors, (103), 74 states have return successors, (122), 71 states have call predecessors, (122), 88 states have call successors, (122) [2021-12-19 19:14:18,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 581 transitions. [2021-12-19 19:14:18,596 INFO L704 BuchiCegarLoop]: Abstraction has 491 states and 581 transitions. [2021-12-19 19:14:18,597 INFO L587 BuchiCegarLoop]: Abstraction has 491 states and 581 transitions. [2021-12-19 19:14:18,597 INFO L425 BuchiCegarLoop]: ======== Iteration 9============ [2021-12-19 19:14:18,597 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 491 states and 581 transitions. [2021-12-19 19:14:18,599 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 40 [2021-12-19 19:14:18,599 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-19 19:14:18,599 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-19 19:14:18,603 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [6, 6, 6, 5, 5, 5, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-19 19:14:18,603 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-19 19:14:18,603 INFO L791 eck$LassoCheckResult]: Stem: 17665#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(18, 2);call #Ultimate.allocInit(12, 3); 17666#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~ret8#1, main_~x~0#1, main_~result~0#1;main_~x~0#1 := 8; 17700#L39 call main_#t~ret8#1 := fibo1(main_~x~0#1);< 17741#fibo1ENTRY ~n := #in~n; 17805#L10 assume !(~n < 1); 17803#L12 assume !(1 == ~n); 17800#L15 call #t~ret4 := fibo2(~n - 1);< 17801#fibo2ENTRY ~n := #in~n; 17821#L20 assume !(~n < 1); 17815#L22 assume !(1 == ~n); 17811#L25 call #t~ret6 := fibo1(~n - 1);< 17812#fibo1ENTRY ~n := #in~n; 17860#L10 assume !(~n < 1); 17859#L12 assume !(1 == ~n); 17850#L15 call #t~ret4 := fibo2(~n - 1);< 17851#fibo2ENTRY ~n := #in~n; 17878#L20 assume !(~n < 1); 17875#L22 assume !(1 == ~n); 17872#L25 call #t~ret6 := fibo1(~n - 1);< 17873#fibo1ENTRY ~n := #in~n; 17895#L10 assume !(~n < 1); 17893#L12 assume !(1 == ~n); 17891#L15 call #t~ret4 := fibo2(~n - 1);< 17892#fibo2ENTRY ~n := #in~n; 17906#L20 assume !(~n < 1); 17904#L22 assume !(1 == ~n); 17901#L25 call #t~ret6 := fibo1(~n - 1);< 17902#fibo1ENTRY ~n := #in~n; 17923#L10 assume !(~n < 1); 17921#L12 assume !(1 == ~n); 17918#L15 call #t~ret4 := fibo2(~n - 1);< 17919#fibo2ENTRY ~n := #in~n; 17926#L20 assume !(~n < 1); 17922#L22 assume 1 == ~n;#res := 1; 17920#fibo2FINAL assume true; 17917#fibo2EXIT >#50#return; 17913#L15-1 call #t~ret5 := fibo2(~n - 2);< 17914#fibo2ENTRY ~n := #in~n; 17953#L20 assume ~n < 1;#res := 0; 17952#fibo2FINAL assume true; 17912#fibo2EXIT >#52#return; 17910#L15-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 17908#fibo1FINAL assume true; 17900#fibo1EXIT >#46#return; 17898#L25-1 call #t~ret7 := fibo1(~n - 2);< 17899#fibo1ENTRY ~n := #in~n; 17907#L10 assume !(~n < 1); 17905#L12 assume 1 == ~n;#res := 1; 17903#fibo1FINAL assume true; 17897#fibo1EXIT >#48#return; 17896#L25-2 #res := #t~ret6 + #t~ret7;havoc #t~ret6;havoc #t~ret7; 17894#fibo2FINAL assume true; 17890#fibo2EXIT >#50#return; 17685#L15-1 call #t~ret5 := fibo2(~n - 2);< 17877#fibo2ENTRY ~n := #in~n; 17915#L20 assume !(~n < 1); 17911#L22 assume 1 == ~n;#res := 1; 17909#fibo2FINAL assume true; 17889#fibo2EXIT >#52#return; 17876#L15-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 17888#fibo1FINAL assume true; 17871#fibo1EXIT >#46#return; 17841#L25-1 call #t~ret7 := fibo1(~n - 2);< 17848#fibo1ENTRY ~n := #in~n; 17966#L10 assume !(~n < 1); 17931#L12 assume !(1 == ~n); 17687#L15 call #t~ret4 := fibo2(~n - 1);< 17925#fibo2ENTRY [2021-12-19 19:14:18,603 INFO L793 eck$LassoCheckResult]: Loop: 17925#fibo2ENTRY ~n := #in~n; 17934#L20 assume !(~n < 1); 17930#L22 assume !(1 == ~n); 17737#L25 call #t~ret6 := fibo1(~n - 1);< 18088#fibo1ENTRY ~n := #in~n; 17933#L10 assume !(~n < 1); 17928#L12 assume !(1 == ~n); 17683#L15 call #t~ret4 := fibo2(~n - 1);< 17925#fibo2ENTRY [2021-12-19 19:14:18,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 19:14:18,604 INFO L85 PathProgramCache]: Analyzing trace with hash 930400901, now seen corresponding path program 1 times [2021-12-19 19:14:18,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 19:14:18,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205269850] [2021-12-19 19:14:18,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 19:14:18,604 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 19:14:18,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 19:14:18,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-19 19:14:18,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 19:14:18,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-19 19:14:18,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 19:14:18,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-19 19:14:18,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 19:14:18,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-19 19:14:18,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 19:14:18,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-19 19:14:18,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 19:14:18,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-19 19:14:18,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 19:14:18,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-19 19:14:18,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 19:14:18,761 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 39 proven. 64 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-19 19:14:18,762 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 19:14:18,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205269850] [2021-12-19 19:14:18,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205269850] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-19 19:14:18,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850870560] [2021-12-19 19:14:18,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 19:14:18,762 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 19:14:18,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 19:14:18,763 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-19 19:14:18,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2021-12-19 19:14:18,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 19:14:18,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-19 19:14:18,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 19:14:18,889 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 37 proven. 59 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-19 19:14:18,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-19 19:14:19,098 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 37 proven. 59 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-19 19:14:19,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850870560] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-19 19:14:19,098 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-19 19:14:19,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 15, 15] total 25 [2021-12-19 19:14:19,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20103814] [2021-12-19 19:14:19,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-19 19:14:19,099 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-12-19 19:14:19,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 19:14:19,099 INFO L85 PathProgramCache]: Analyzing trace with hash -28526872, now seen corresponding path program 3 times [2021-12-19 19:14:19,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 19:14:19,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165184171] [2021-12-19 19:14:19,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 19:14:19,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 19:14:19,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-19 19:14:19,102 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-19 19:14:19,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-19 19:14:19,103 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-19 19:14:19,172 INFO L210 LassoAnalysis]: Preferences: [2021-12-19 19:14:19,173 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-19 19:14:19,173 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-19 19:14:19,173 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-19 19:14:19,173 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-12-19 19:14:19,173 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 19:14:19,173 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-19 19:14:19,173 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-19 19:14:19,173 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_8-1.c_Iteration9_Loop [2021-12-19 19:14:19,173 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-19 19:14:19,174 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-19 19:14:19,174 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:19,175 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:19,180 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:19,181 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:19,182 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:19,184 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:19,185 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:19,186 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:19,187 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:19,189 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:19,218 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-19 19:14:19,218 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-12-19 19:14:19,218 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 19:14:19,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 19:14:19,219 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-19 19:14:19,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (87)] Waiting until timeout for monitored process [2021-12-19 19:14:19,222 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-19 19:14:19,222 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-19 19:14:19,247 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-19 19:14:19,247 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_~n=0} Honda state: {fibo2_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-12-19 19:14:19,263 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (87)] Forceful destruction successful, exit code 0 [2021-12-19 19:14:19,263 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 19:14:19,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 19:14:19,264 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-19 19:14:19,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (88)] Waiting until timeout for monitored process [2021-12-19 19:14:19,267 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-19 19:14:19,267 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-19 19:14:19,286 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (88)] Ended with exit code 0 [2021-12-19 19:14:19,287 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 19:14:19,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 19:14:19,288 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-19 19:14:19,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (89)] Waiting until timeout for monitored process [2021-12-19 19:14:19,289 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-12-19 19:14:19,289 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-19 19:14:19,337 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-12-19 19:14:19,339 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (89)] Forceful destruction successful, exit code 0 [2021-12-19 19:14:19,339 INFO L210 LassoAnalysis]: Preferences: [2021-12-19 19:14:19,339 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-19 19:14:19,339 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-19 19:14:19,339 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-19 19:14:19,339 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-12-19 19:14:19,339 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 19:14:19,339 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-19 19:14:19,339 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-19 19:14:19,340 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_8-1.c_Iteration9_Loop [2021-12-19 19:14:19,340 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-19 19:14:19,340 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-19 19:14:19,340 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:19,341 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:19,345 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:19,348 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:19,349 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:19,350 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:19,362 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:19,363 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:19,364 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:19,365 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:19,387 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-19 19:14:19,387 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-12-19 19:14:19,387 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 19:14:19,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 19:14:19,399 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-19 19:14:19,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (90)] Waiting until timeout for monitored process [2021-12-19 19:14:19,401 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-12-19 19:14:19,406 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-19 19:14:19,406 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-19 19:14:19,406 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-19 19:14:19,406 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-19 19:14:19,406 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-19 19:14:19,406 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-19 19:14:19,407 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-19 19:14:19,407 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-19 19:14:19,422 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (90)] Ended with exit code 0 [2021-12-19 19:14:19,422 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 19:14:19,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 19:14:19,423 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-19 19:14:19,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (91)] Waiting until timeout for monitored process [2021-12-19 19:14:19,428 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-12-19 19:14:19,433 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-19 19:14:19,433 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-19 19:14:19,433 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-19 19:14:19,433 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-19 19:14:19,433 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-19 19:14:19,434 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-19 19:14:19,434 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-19 19:14:19,435 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-12-19 19:14:19,436 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-12-19 19:14:19,436 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-12-19 19:14:19,436 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 19:14:19,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 19:14:19,437 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-19 19:14:19,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (92)] Waiting until timeout for monitored process [2021-12-19 19:14:19,439 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-12-19 19:14:19,439 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-12-19 19:14:19,439 INFO L513 LassoAnalysis]: Proved termination. [2021-12-19 19:14:19,439 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo2_#in~n) = 1*fibo2_#in~n Supporting invariants [] [2021-12-19 19:14:19,453 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (91)] Ended with exit code 0 [2021-12-19 19:14:19,453 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-12-19 19:14:19,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 19:14:19,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 19:14:19,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-19 19:14:19,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 19:14:19,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 19:14:19,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-19 19:14:19,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 19:14:19,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-19 19:14:19,965 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 5 loop predicates [2021-12-19 19:14:19,965 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 491 states and 581 transitions. cyclomatic complexity: 96 Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 5 states have internal predecessors, (27), 4 states have call successors, (12), 4 states have call predecessors, (12), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-19 19:14:20,029 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 491 states and 581 transitions. cyclomatic complexity: 96. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 5 states have internal predecessors, (27), 4 states have call successors, (12), 4 states have call predecessors, (12), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Result 516 states and 606 transitions. Complement of second has 15 states. [2021-12-19 19:14:20,037 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 [2021-12-19 19:14:20,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 5 states have internal predecessors, (27), 4 states have call successors, (12), 4 states have call predecessors, (12), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-19 19:14:20,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 17 transitions. [2021-12-19 19:14:20,038 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 17 transitions. Stem has 67 letters. Loop has 8 letters. [2021-12-19 19:14:20,038 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-19 19:14:20,038 INFO L634 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-12-19 19:14:20,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 19:14:20,077 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (92)] Forceful destruction successful, exit code 0 [2021-12-19 19:14:20,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 19:14:20,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-19 19:14:20,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 19:14:20,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 19:14:20,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-19 19:14:20,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 19:14:20,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-19 19:14:20,549 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 5 loop predicates [2021-12-19 19:14:20,549 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 491 states and 581 transitions. cyclomatic complexity: 96 Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 5 states have internal predecessors, (27), 4 states have call successors, (12), 4 states have call predecessors, (12), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-19 19:14:20,605 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 491 states and 581 transitions. cyclomatic complexity: 96. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 5 states have internal predecessors, (27), 4 states have call successors, (12), 4 states have call predecessors, (12), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Result 516 states and 606 transitions. Complement of second has 15 states. [2021-12-19 19:14:20,613 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 [2021-12-19 19:14:20,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 5 states have internal predecessors, (27), 4 states have call successors, (12), 4 states have call predecessors, (12), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-19 19:14:20,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 17 transitions. [2021-12-19 19:14:20,614 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 17 transitions. Stem has 67 letters. Loop has 8 letters. [2021-12-19 19:14:20,615 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-19 19:14:20,615 INFO L634 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-12-19 19:14:20,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 19:14:20,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 19:14:20,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-19 19:14:20,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 19:14:21,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 19:14:21,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-19 19:14:21,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 19:14:21,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-19 19:14:21,250 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 5 loop predicates [2021-12-19 19:14:21,250 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 491 states and 581 transitions. cyclomatic complexity: 96 Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 5 states have internal predecessors, (27), 4 states have call successors, (12), 4 states have call predecessors, (12), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-19 19:14:21,346 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 491 states and 581 transitions. cyclomatic complexity: 96. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 5 states have internal predecessors, (27), 4 states have call successors, (12), 4 states have call predecessors, (12), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Result 764 states and 882 transitions. Complement of second has 25 states. [2021-12-19 19:14:21,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 8 states 2 stem states 5 non-accepting loop states 1 accepting loop states [2021-12-19 19:14:21,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 5 states have internal predecessors, (27), 4 states have call successors, (12), 4 states have call predecessors, (12), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-19 19:14:21,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 42 transitions. [2021-12-19 19:14:21,347 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 42 transitions. Stem has 67 letters. Loop has 8 letters. [2021-12-19 19:14:21,347 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-19 19:14:21,348 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 42 transitions. Stem has 75 letters. Loop has 8 letters. [2021-12-19 19:14:21,348 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-19 19:14:21,348 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 42 transitions. Stem has 67 letters. Loop has 16 letters. [2021-12-19 19:14:21,348 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-19 19:14:21,348 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 764 states and 882 transitions. [2021-12-19 19:14:21,352 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 24 [2021-12-19 19:14:21,354 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 764 states to 568 states and 666 transitions. [2021-12-19 19:14:21,354 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 298 [2021-12-19 19:14:21,354 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 328 [2021-12-19 19:14:21,354 INFO L73 IsDeterministic]: Start isDeterministic. Operand 568 states and 666 transitions. [2021-12-19 19:14:21,354 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-12-19 19:14:21,354 INFO L681 BuchiCegarLoop]: Abstraction has 568 states and 666 transitions. [2021-12-19 19:14:21,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states and 666 transitions. [2021-12-19 19:14:21,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 539. [2021-12-19 19:14:21,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 357 states have (on average 1.112044817927171) internal successors, (397), 388 states have internal predecessors, (397), 104 states have call successors, (110), 77 states have call predecessors, (110), 78 states have return successors, (125), 73 states have call predecessors, (125), 94 states have call successors, (125) [2021-12-19 19:14:21,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 632 transitions. [2021-12-19 19:14:21,378 INFO L704 BuchiCegarLoop]: Abstraction has 539 states and 632 transitions. [2021-12-19 19:14:21,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-19 19:14:21,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-19 19:14:21,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2021-12-19 19:14:21,379 INFO L87 Difference]: Start difference. First operand 539 states and 632 transitions. Second operand has 25 states, 21 states have (on average 2.761904761904762) internal successors, (58), 19 states have internal predecessors, (58), 13 states have call successors, (20), 6 states have call predecessors, (20), 6 states have return successors, (16), 10 states have call predecessors, (16), 8 states have call successors, (16) [2021-12-19 19:14:21,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 19:14:21,786 INFO L93 Difference]: Finished difference Result 683 states and 845 transitions. [2021-12-19 19:14:21,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-19 19:14:21,787 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 683 states and 845 transitions. [2021-12-19 19:14:21,790 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 24 [2021-12-19 19:14:21,793 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 683 states to 623 states and 768 transitions. [2021-12-19 19:14:21,793 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 335 [2021-12-19 19:14:21,794 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 335 [2021-12-19 19:14:21,794 INFO L73 IsDeterministic]: Start isDeterministic. Operand 623 states and 768 transitions. [2021-12-19 19:14:21,794 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-12-19 19:14:21,794 INFO L681 BuchiCegarLoop]: Abstraction has 623 states and 768 transitions. [2021-12-19 19:14:21,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states and 768 transitions. [2021-12-19 19:14:21,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 575. [2021-12-19 19:14:21,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 377 states have (on average 1.1114058355437666) internal successors, (419), 403 states have internal predecessors, (419), 115 states have call successors, (121), 80 states have call predecessors, (121), 83 states have return successors, (167), 91 states have call predecessors, (167), 99 states have call successors, (167) [2021-12-19 19:14:21,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 707 transitions. [2021-12-19 19:14:21,802 INFO L704 BuchiCegarLoop]: Abstraction has 575 states and 707 transitions. [2021-12-19 19:14:21,803 INFO L587 BuchiCegarLoop]: Abstraction has 575 states and 707 transitions. [2021-12-19 19:14:21,803 INFO L425 BuchiCegarLoop]: ======== Iteration 10============ [2021-12-19 19:14:21,803 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 575 states and 707 transitions. [2021-12-19 19:14:21,805 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 23 [2021-12-19 19:14:21,805 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-19 19:14:21,805 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-19 19:14:21,806 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [7, 7, 7, 6, 6, 5, 5, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-19 19:14:21,806 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-19 19:14:21,806 INFO L791 eck$LassoCheckResult]: Stem: 22504#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true;#NULL.base, #NULL.offset := 0, 0;assume 0 == #valid[0];assume 0 < #StackHeapBarrier;call #Ultimate.allocInit(2, 1);call write~init~int(48, 1, 0, 1);call write~init~int(0, 1, 1, 1);call #Ultimate.allocInit(18, 2);call #Ultimate.allocInit(12, 3); 22505#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~ret8#1, main_~x~0#1, main_~result~0#1;main_~x~0#1 := 8; 22536#L39 call main_#t~ret8#1 := fibo1(main_~x~0#1);< 22576#fibo1ENTRY ~n := #in~n; 22609#L10 assume !(~n < 1); 22607#L12 assume !(1 == ~n); 22604#L15 call #t~ret4 := fibo2(~n - 1);< 22605#fibo2ENTRY ~n := #in~n; 22619#L20 assume !(~n < 1); 22617#L22 assume !(1 == ~n); 22614#L25 call #t~ret6 := fibo1(~n - 1);< 22615#fibo1ENTRY ~n := #in~n; 22638#L10 assume !(~n < 1); 22636#L12 assume !(1 == ~n); 22633#L15 call #t~ret4 := fibo2(~n - 1);< 22634#fibo2ENTRY ~n := #in~n; 22657#L20 assume !(~n < 1); 22655#L22 assume !(1 == ~n); 22652#L25 call #t~ret6 := fibo1(~n - 1);< 22653#fibo1ENTRY ~n := #in~n; 22675#L10 assume !(~n < 1); 22673#L12 assume !(1 == ~n); 22670#L15 call #t~ret4 := fibo2(~n - 1);< 22671#fibo2ENTRY ~n := #in~n; 22688#L20 assume !(~n < 1); 22685#L22 assume !(1 == ~n); 22681#L25 call #t~ret6 := fibo1(~n - 1);< 22682#fibo1ENTRY ~n := #in~n; 22700#L10 assume !(~n < 1); 22698#L12 assume !(1 == ~n); 22694#L15 call #t~ret4 := fibo2(~n - 1);< 22695#fibo2ENTRY ~n := #in~n; 22701#L20 assume !(~n < 1); 22699#L22 assume 1 == ~n;#res := 1; 22697#fibo2FINAL assume true; 22693#fibo2EXIT >#50#return; 22690#L15-1 call #t~ret5 := fibo2(~n - 2);< 22691#fibo2ENTRY ~n := #in~n; 22696#L20 assume ~n < 1;#res := 0; 22692#fibo2FINAL assume true; 22689#fibo2EXIT >#52#return; 22687#L15-2 #res := #t~ret4 + #t~ret5;havoc #t~ret4;havoc #t~ret5; 22684#fibo1FINAL assume true; 22680#fibo1EXIT >#46#return; 22677#L25-1 call #t~ret7 := fibo1(~n - 2);< 22678#fibo1ENTRY ~n := #in~n; 22686#L10 assume !(~n < 1); 22683#L12 assume 1 == ~n;#res := 1; 22679#fibo1FINAL assume true; 22676#fibo1EXIT >#48#return; 22674#L25-2 #res := #t~ret6 + #t~ret7;havoc #t~ret6;havoc #t~ret7; 22672#fibo2FINAL assume true; 22669#fibo2EXIT >#50#return; 22666#L15-1 call #t~ret5 := fibo2(~n - 2);< 22668#fibo2ENTRY ~n := #in~n; 22738#L20 assume !(~n < 1); 22735#L22 assume !(1 == ~n); 22733#L25 call #t~ret6 := fibo1(~n - 1);< 22734#fibo1ENTRY ~n := #in~n; 22918#L10 assume !(~n < 1); 22919#L12 assume !(1 == ~n); 22514#L15 call #t~ret4 := fibo2(~n - 1);< 22978#fibo2ENTRY ~n := #in~n; 22565#L20 assume !(~n < 1); 22510#L22 assume !(1 == ~n); 22513#L25 call #t~ret6 := fibo1(~n - 1);< 23057#fibo1ENTRY ~n := #in~n; 23056#L10 assume !(~n < 1); 23055#L12 assume !(1 == ~n); 22546#L15 [2021-12-19 19:14:21,806 INFO L793 eck$LassoCheckResult]: Loop: 22546#L15 call #t~ret4 := fibo2(~n - 1);< 23005#fibo2ENTRY ~n := #in~n; 23006#L20 assume !(~n < 1); 23058#L22 assume !(1 == ~n); 23007#L25 call #t~ret6 := fibo1(~n - 1);< 23057#fibo1ENTRY ~n := #in~n; 23056#L10 assume !(~n < 1); 23055#L12 assume !(1 == ~n); 22546#L15 [2021-12-19 19:14:21,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 19:14:21,807 INFO L85 PathProgramCache]: Analyzing trace with hash -1054902100, now seen corresponding path program 2 times [2021-12-19 19:14:21,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 19:14:21,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14752996] [2021-12-19 19:14:21,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 19:14:21,807 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 19:14:21,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 19:14:21,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-19 19:14:21,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 19:14:21,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-19 19:14:21,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 19:14:21,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-19 19:14:21,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 19:14:21,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-19 19:14:21,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 19:14:21,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-19 19:14:21,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 19:14:21,935 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 92 proven. 39 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-19 19:14:21,935 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-19 19:14:21,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14752996] [2021-12-19 19:14:21,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14752996] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-19 19:14:21,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224431224] [2021-12-19 19:14:21,936 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-19 19:14:21,936 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-19 19:14:21,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 19:14:21,937 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-19 19:14:21,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2021-12-19 19:14:21,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-19 19:14:21,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-19 19:14:21,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-19 19:14:21,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 19:14:22,060 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 92 proven. 39 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-19 19:14:22,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-19 19:14:22,180 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 92 proven. 39 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-19 19:14:22,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224431224] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-19 19:14:22,180 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-19 19:14:22,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 19] total 20 [2021-12-19 19:14:22,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091715919] [2021-12-19 19:14:22,181 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-19 19:14:22,181 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-12-19 19:14:22,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 19:14:22,181 INFO L85 PathProgramCache]: Analyzing trace with hash 519237434, now seen corresponding path program 4 times [2021-12-19 19:14:22,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-19 19:14:22,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581723217] [2021-12-19 19:14:22,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-19 19:14:22,182 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-19 19:14:22,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-19 19:14:22,184 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-19 19:14:22,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-19 19:14:22,185 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-19 19:14:22,281 INFO L210 LassoAnalysis]: Preferences: [2021-12-19 19:14:22,282 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-19 19:14:22,282 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-19 19:14:22,282 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-19 19:14:22,282 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-12-19 19:14:22,282 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 19:14:22,282 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-19 19:14:22,282 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-19 19:14:22,282 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_8-1.c_Iteration10_Loop [2021-12-19 19:14:22,282 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-19 19:14:22,282 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-19 19:14:22,282 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:22,286 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:22,291 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:22,292 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:22,293 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:22,294 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:22,296 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:22,297 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:22,298 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:22,333 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-19 19:14:22,333 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-12-19 19:14:22,333 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 19:14:22,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 19:14:22,334 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-19 19:14:22,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (94)] Waiting until timeout for monitored process [2021-12-19 19:14:22,336 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-19 19:14:22,336 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-19 19:14:22,342 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-19 19:14:22,342 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#res=0} Honda state: {fibo1_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-12-19 19:14:22,356 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (94)] Ended with exit code 0 [2021-12-19 19:14:22,356 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 19:14:22,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 19:14:22,357 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-19 19:14:22,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (95)] Waiting until timeout for monitored process [2021-12-19 19:14:22,359 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-19 19:14:22,359 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-19 19:14:22,383 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (95)] Ended with exit code 0 [2021-12-19 19:14:22,384 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 19:14:22,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 19:14:22,385 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-19 19:14:22,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (96)] Waiting until timeout for monitored process [2021-12-19 19:14:22,386 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-12-19 19:14:22,386 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-19 19:14:23,133 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-12-19 19:14:23,135 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (96)] Ended with exit code 0 [2021-12-19 19:14:23,136 INFO L210 LassoAnalysis]: Preferences: [2021-12-19 19:14:23,136 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-19 19:14:23,136 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-19 19:14:23,136 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-19 19:14:23,136 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-12-19 19:14:23,136 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 19:14:23,136 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-19 19:14:23,136 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-19 19:14:23,136 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_8-1.c_Iteration10_Loop [2021-12-19 19:14:23,136 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-19 19:14:23,136 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-19 19:14:23,137 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:23,147 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:23,152 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:23,154 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:23,155 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:23,161 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:23,163 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:23,164 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:23,165 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-19 19:14:23,195 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-19 19:14:23,196 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-12-19 19:14:23,196 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 19:14:23,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 19:14:23,197 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-19 19:14:23,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (97)] Waiting until timeout for monitored process [2021-12-19 19:14:23,198 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-12-19 19:14:23,203 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-19 19:14:23,204 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-19 19:14:23,204 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-19 19:14:23,204 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-19 19:14:23,204 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-19 19:14:23,204 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-19 19:14:23,204 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-19 19:14:23,205 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-19 19:14:23,220 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (97)] Ended with exit code 0 [2021-12-19 19:14:23,220 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 19:14:23,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 19:14:23,221 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-19 19:14:23,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (98)] Waiting until timeout for monitored process [2021-12-19 19:14:23,223 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-12-19 19:14:23,228 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-19 19:14:23,228 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-19 19:14:23,228 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-19 19:14:23,228 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-19 19:14:23,228 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-19 19:14:23,229 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-19 19:14:23,229 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-19 19:14:23,231 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-12-19 19:14:23,234 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-12-19 19:14:23,234 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-12-19 19:14:23,234 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-19 19:14:23,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-19 19:14:23,235 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-19 19:14:23,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (99)] Waiting until timeout for monitored process [2021-12-19 19:14:23,236 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-12-19 19:14:23,236 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-12-19 19:14:23,236 INFO L513 LassoAnalysis]: Proved termination. [2021-12-19 19:14:23,236 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo1_~n) = 1*fibo1_~n Supporting invariants [] [2021-12-19 19:14:23,251 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (98)] Forceful destruction successful, exit code 0 [2021-12-19 19:14:23,251 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-12-19 19:14:23,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 19:14:23,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 19:14:23,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 557 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-19 19:14:23,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 19:14:23,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 19:14:23,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-19 19:14:23,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 19:14:23,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-19 19:14:23,707 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 [2021-12-19 19:14:23,707 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 575 states and 707 transitions. cyclomatic complexity: 137 Second operand has 8 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 4 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-19 19:14:23,785 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (99)] Forceful destruction successful, exit code 0 [2021-12-19 19:14:23,793 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 575 states and 707 transitions. cyclomatic complexity: 137. Second operand has 8 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 4 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Result 606 states and 738 transitions. Complement of second has 19 states. [2021-12-19 19:14:23,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 8 states 2 stem states 5 non-accepting loop states 1 accepting loop states [2021-12-19 19:14:23,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 4 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-19 19:14:23,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 20 transitions. [2021-12-19 19:14:23,794 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 20 transitions. Stem has 69 letters. Loop has 8 letters. [2021-12-19 19:14:23,794 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-19 19:14:23,794 INFO L634 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-12-19 19:14:23,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 19:14:23,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 19:14:23,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 557 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-19 19:14:23,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 19:14:24,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 19:14:24,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-19 19:14:24,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 19:14:24,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-19 19:14:24,239 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 6 loop predicates [2021-12-19 19:14:24,239 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 575 states and 707 transitions. cyclomatic complexity: 137 Second operand has 8 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 4 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-19 19:14:24,313 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 575 states and 707 transitions. cyclomatic complexity: 137. Second operand has 8 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 4 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Result 606 states and 738 transitions. Complement of second has 21 states. [2021-12-19 19:14:24,323 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 [2021-12-19 19:14:24,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 4 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-19 19:14:24,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 19 transitions. [2021-12-19 19:14:24,324 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 19 transitions. Stem has 69 letters. Loop has 8 letters. [2021-12-19 19:14:24,324 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-19 19:14:24,324 INFO L634 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-12-19 19:14:24,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-19 19:14:24,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 19:14:24,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 557 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-19 19:14:24,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 19:14:24,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-19 19:14:24,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-19 19:14:24,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-19 19:14:24,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-19 19:14:24,758 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 6 loop predicates [2021-12-19 19:14:24,758 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 575 states and 707 transitions. cyclomatic complexity: 137 Second operand has 8 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 4 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-19 19:14:24,851 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 575 states and 707 transitions. cyclomatic complexity: 137. Second operand has 8 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 4 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Result 1123 states and 1346 transitions. Complement of second has 33 states. [2021-12-19 19:14:24,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 8 states 2 stem states 5 non-accepting loop states 1 accepting loop states [2021-12-19 19:14:24,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 4 states have call successors, (11), 4 states have call predecessors, (11), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-19 19:14:24,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 43 transitions. [2021-12-19 19:14:24,852 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 43 transitions. Stem has 69 letters. Loop has 8 letters. [2021-12-19 19:14:24,853 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-19 19:14:24,853 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 43 transitions. Stem has 77 letters. Loop has 8 letters. [2021-12-19 19:14:24,853 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-19 19:14:24,853 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 43 transitions. Stem has 69 letters. Loop has 16 letters. [2021-12-19 19:14:24,853 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-19 19:14:24,853 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1123 states and 1346 transitions. [2021-12-19 19:14:24,858 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-12-19 19:14:24,859 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1123 states to 0 states and 0 transitions. [2021-12-19 19:14:24,859 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2021-12-19 19:14:24,859 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2021-12-19 19:14:24,859 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2021-12-19 19:14:24,859 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-19 19:14:24,859 INFO L681 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-19 19:14:24,859 INFO L704 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-19 19:14:24,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-19 19:14:24,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-19 19:14:24,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-12-19 19:14:24,860 INFO L87 Difference]: Start difference. First operand 0 states and 0 transitions. Second operand has 20 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 12 states have internal predecessors, (46), 10 states have call successors, (15), 10 states have call predecessors, (15), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-19 19:14:24,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-19 19:14:24,860 INFO L93 Difference]: Finished difference Result 0 states and 0 transitions. [2021-12-19 19:14:24,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-19 19:14:24,860 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 0 states and 0 transitions. [2021-12-19 19:14:24,861 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-12-19 19:14:24,861 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 0 states to 0 states and 0 transitions. [2021-12-19 19:14:24,861 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2021-12-19 19:14:24,861 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2021-12-19 19:14:24,861 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2021-12-19 19:14:24,861 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-19 19:14:24,861 INFO L681 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-19 19:14:24,861 INFO L704 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-19 19:14:24,861 INFO L587 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-19 19:14:24,861 INFO L425 BuchiCegarLoop]: ======== Iteration 11============ [2021-12-19 19:14:24,861 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2021-12-19 19:14:24,862 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-12-19 19:14:24,862 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2021-12-19 19:14:24,868 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 19.12 07:14:24 BoogieIcfgContainer [2021-12-19 19:14:24,869 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2021-12-19 19:14:24,869 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-19 19:14:24,869 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-19 19:14:24,869 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-19 19:14:24,870 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.12 07:14:02" (3/4) ... [2021-12-19 19:14:24,872 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-12-19 19:14:24,872 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-19 19:14:24,872 INFO L158 Benchmark]: Toolchain (without parser) took 22743.00ms. Allocated memory was 113.2MB in the beginning and 197.1MB in the end (delta: 83.9MB). Free memory was 84.3MB in the beginning and 119.0MB in the end (delta: -34.7MB). Peak memory consumption was 49.0MB. Max. memory is 16.1GB. [2021-12-19 19:14:24,873 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 79.7MB. Free memory was 50.6MB in the beginning and 50.5MB in the end (delta: 26.8kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-19 19:14:24,873 INFO L158 Benchmark]: CACSL2BoogieTranslator took 149.88ms. Allocated memory is still 113.2MB. Free memory was 84.1MB in the beginning and 91.4MB in the end (delta: -7.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-19 19:14:24,873 INFO L158 Benchmark]: Boogie Procedure Inliner took 16.78ms. Allocated memory is still 113.2MB. Free memory was 91.4MB in the beginning and 90.3MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-19 19:14:24,873 INFO L158 Benchmark]: Boogie Preprocessor took 9.29ms. Allocated memory is still 113.2MB. Free memory was 90.3MB in the beginning and 89.0MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-19 19:14:24,874 INFO L158 Benchmark]: RCFGBuilder took 153.84ms. Allocated memory is still 113.2MB. Free memory was 89.0MB in the beginning and 80.5MB in the end (delta: 8.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-19 19:14:24,874 INFO L158 Benchmark]: BuchiAutomizer took 22403.20ms. Allocated memory was 113.2MB in the beginning and 197.1MB in the end (delta: 83.9MB). Free memory was 79.8MB in the beginning and 119.0MB in the end (delta: -39.2MB). Peak memory consumption was 45.4MB. Max. memory is 16.1GB. [2021-12-19 19:14:24,874 INFO L158 Benchmark]: Witness Printer took 2.64ms. Allocated memory is still 197.1MB. Free memory is still 119.0MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-19 19:14:24,875 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 79.7MB. Free memory was 50.6MB in the beginning and 50.5MB in the end (delta: 26.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 149.88ms. Allocated memory is still 113.2MB. Free memory was 84.1MB in the beginning and 91.4MB in the end (delta: -7.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 16.78ms. Allocated memory is still 113.2MB. Free memory was 91.4MB in the beginning and 90.3MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 9.29ms. Allocated memory is still 113.2MB. Free memory was 90.3MB in the beginning and 89.0MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 153.84ms. Allocated memory is still 113.2MB. Free memory was 89.0MB in the beginning and 80.5MB in the end (delta: 8.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * BuchiAutomizer took 22403.20ms. Allocated memory was 113.2MB in the beginning and 197.1MB in the end (delta: 83.9MB). Free memory was 79.8MB in the beginning and 119.0MB in the end (delta: -39.2MB). Peak memory consumption was 45.4MB. Max. memory is 16.1GB. * Witness Printer took 2.64ms. Allocated memory is still 197.1MB. Free memory is still 119.0MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 16 terminating modules (9 trivial, 3 deterministic, 4 nondeterministic). One deterministic module has affine ranking function \old(n) and consists of 7 locations. One deterministic module has affine ranking function n and consists of 12 locations. One deterministic module has affine ranking function n and consists of 13 locations. One nondeterministic module has affine ranking function \old(n) and consists of 8 locations. One nondeterministic module has affine ranking function n and consists of 12 locations. One nondeterministic module has affine ranking function \old(n) and consists of 8 locations. One nondeterministic module has affine ranking function n and consists of 8 locations. 9 modules have a trivial ranking function, the largest among these consists of 26 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 22.3s and 11 iterations. TraceHistogramMax:7. Analysis of lassos took 11.6s. Construction of modules took 1.7s. Büchi inclusion checks took 8.5s. Highest rank in rank-based complementation 3. Minimization of det autom 2. Minimization of nondet autom 14. Automata minimization 0.1s AutomataMinimizationTime, 14 MinimizatonAttempts, 497 StatesRemovedByMinimization, 14 NontrivialMinimizations. Non-live state removal took 0.1s Buchi closure took 0.0s. Biggest automaton had 575 states and ocurred in iteration 9. Nontrivial modules had stage [3, 0, 4, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 1/19 HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1375 SdHoareTripleChecker+Valid, 2.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1332 mSDsluCounter, 2086 SdHoareTripleChecker+Invalid, 1.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1578 mSDsCounter, 817 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 4141 IncrementalHoareTripleChecker+Invalid, 4958 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 817 mSolverCounterUnsat, 508 mSDtfsCounter, 4141 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT1 conc0 concLT0 SILN0 SILU0 SILI3 SILT6 lasso0 LassoPreprocessingBenchmarks: Lassos: inital18 mio100 ax100 hnf90 lsp91 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq188 hnf92 smp79 dnf100 smp100 tf110 neg97 sie106 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 15ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 32 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 7 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 4.0s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! [2021-12-19 19:14:24,904 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2021-12-19 19:14:25,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2021-12-19 19:14:25,320 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2021-12-19 19:14:25,519 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2021-12-19 19:14:25,720 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2021-12-19 19:14:25,920 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2021-12-19 19:14:26,120 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2021-12-19 19:14:26,320 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2021-12-19 19:14:26,520 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2021-12-19 19:14:26,720 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-12-19 19:14:26,922 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE