./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/recursive-simple/fibo_2calls_6-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 9a8b2e8d 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_1.3.100.v20150511-1540.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_6-2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(F end) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 92a849e92f30134540f9595cfce3299e46e1c2b1 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-9a8b2e8 [2020-10-20 08:00:45,967 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 08:00:45,970 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 08:00:45,996 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 08:00:45,997 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 08:00:45,998 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 08:00:45,999 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 08:00:46,001 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 08:00:46,003 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 08:00:46,004 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 08:00:46,005 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 08:00:46,006 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 08:00:46,006 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 08:00:46,007 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 08:00:46,008 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 08:00:46,010 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 08:00:46,010 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 08:00:46,011 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 08:00:46,013 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 08:00:46,015 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 08:00:46,017 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 08:00:46,025 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 08:00:46,027 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 08:00:46,028 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 08:00:46,031 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 08:00:46,031 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 08:00:46,032 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 08:00:46,032 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 08:00:46,033 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 08:00:46,034 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 08:00:46,034 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 08:00:46,035 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 08:00:46,036 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 08:00:46,037 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 08:00:46,038 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 08:00:46,038 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 08:00:46,039 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 08:00:46,039 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 08:00:46,040 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 08:00:46,041 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 08:00:46,041 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 08:00:46,044 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-32bit-Automizer_Default.epf [2020-10-20 08:00:46,094 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 08:00:46,094 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 08:00:46,095 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 08:00:46,095 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 08:00:46,095 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 08:00:46,096 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2020-10-20 08:00:46,096 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2020-10-20 08:00:46,096 INFO L138 SettingsManager]: * Use old map elimination=false [2020-10-20 08:00:46,096 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2020-10-20 08:00:46,096 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2020-10-20 08:00:46,096 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2020-10-20 08:00:46,097 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 08:00:46,097 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-20 08:00:46,097 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-10-20 08:00:46,098 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-20 08:00:46,098 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-20 08:00:46,098 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 08:00:46,098 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2020-10-20 08:00:46,098 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2020-10-20 08:00:46,098 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2020-10-20 08:00:46,099 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-20 08:00:46,099 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-20 08:00:46,099 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2020-10-20 08:00:46,100 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 08:00:46,100 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2020-10-20 08:00:46,100 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 08:00:46,100 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 08:00:46,100 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2020-10-20 08:00:46,101 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 08:00:46,101 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-20 08:00:46,101 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 08:00:46,101 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2020-10-20 08:00:46,103 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2020-10-20 08:00:46,103 INFO L138 SettingsManager]: * TransformationType=MODULO_NEIGHBOR 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 -> 92a849e92f30134540f9595cfce3299e46e1c2b1 [2020-10-20 08:00:46,323 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 08:00:46,336 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 08:00:46,344 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 08:00:46,346 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 08:00:46,348 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 08:00:46,350 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/fibo_2calls_6-2.c [2020-10-20 08:00:46,430 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a009f02b/320f00ff37d3416d9a0cb68582a159b6/FLAG666541c8b [2020-10-20 08:00:46,948 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 08:00:46,949 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_2calls_6-2.c [2020-10-20 08:00:46,958 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a009f02b/320f00ff37d3416d9a0cb68582a159b6/FLAG666541c8b [2020-10-20 08:00:47,289 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a009f02b/320f00ff37d3416d9a0cb68582a159b6 [2020-10-20 08:00:47,293 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 08:00:47,301 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-20 08:00:47,302 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 08:00:47,302 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 08:00:47,306 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 08:00:47,307 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 08:00:47" (1/1) ... [2020-10-20 08:00:47,310 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3bf8f6c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 08:00:47, skipping insertion in model container [2020-10-20 08:00:47,310 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 08:00:47" (1/1) ... [2020-10-20 08:00:47,318 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 08:00:47,338 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 08:00:47,592 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 08:00:47,606 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 08:00:47,624 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 08:00:47,641 INFO L208 MainTranslator]: Completed translation [2020-10-20 08:00:47,641 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 08:00:47 WrapperNode [2020-10-20 08:00:47,641 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 08:00:47,644 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-20 08:00:47,644 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-20 08:00:47,645 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-20 08:00:47,653 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 08:00:47" (1/1) ... [2020-10-20 08:00:47,661 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 08:00:47" (1/1) ... [2020-10-20 08:00:47,679 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-20 08:00:47,680 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 08:00:47,680 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 08:00:47,680 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 08:00:47,690 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 08:00:47" (1/1) ... [2020-10-20 08:00:47,690 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 08:00:47" (1/1) ... [2020-10-20 08:00:47,692 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 08:00:47" (1/1) ... [2020-10-20 08:00:47,692 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 08:00:47" (1/1) ... [2020-10-20 08:00:47,696 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 08:00:47" (1/1) ... [2020-10-20 08:00:47,699 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 08:00:47" (1/1) ... [2020-10-20 08:00:47,700 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 08:00:47" (1/1) ... [2020-10-20 08:00:47,702 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 08:00:47,703 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 08:00:47,703 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 08:00:47,703 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 08:00:47,704 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 08:00:47" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:47,764 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-20 08:00:47,765 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-10-20 08:00:47,765 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-10-20 08:00:47,765 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-20 08:00:47,765 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-10-20 08:00:47,765 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-10-20 08:00:47,765 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 08:00:47,766 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 08:00:48,012 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 08:00:48,012 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-20 08:00:48,014 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 08:00:48 BoogieIcfgContainer [2020-10-20 08:00:48,015 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 08:00:48,016 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2020-10-20 08:00:48,016 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2020-10-20 08:00:48,020 INFO L275 PluginConnector]: BuchiAutomizer initialized [2020-10-20 08:00:48,021 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-20 08:00:48,021 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 20.10 08:00:47" (1/3) ... [2020-10-20 08:00:48,022 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@2ea53fca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 20.10 08:00:48, skipping insertion in model container [2020-10-20 08:00:48,022 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-20 08:00:48,023 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 08:00:47" (2/3) ... [2020-10-20 08:00:48,023 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@2ea53fca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 20.10 08:00:48, skipping insertion in model container [2020-10-20 08:00:48,023 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-20 08:00:48,024 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 08:00:48" (3/3) ... [2020-10-20 08:00:48,025 INFO L373 chiAutomizerObserver]: Analyzing ICFG fibo_2calls_6-2.c [2020-10-20 08:00:48,121 INFO L359 BuchiCegarLoop]: Interprodecural is true [2020-10-20 08:00:48,122 INFO L360 BuchiCegarLoop]: Hoare is false [2020-10-20 08:00:48,122 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2020-10-20 08:00:48,122 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 08:00:48,123 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 08:00:48,123 INFO L364 BuchiCegarLoop]: Difference is false [2020-10-20 08:00:48,123 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 08:00:48,123 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2020-10-20 08:00:48,142 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 27 states. [2020-10-20 08:00:48,182 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2020-10-20 08:00:48,183 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 08:00:48,183 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 08:00:48,190 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2020-10-20 08:00:48,190 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 08:00:48,190 INFO L427 BuchiCegarLoop]: ======== Iteration 1============ [2020-10-20 08:00:48,191 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 27 states. [2020-10-20 08:00:48,194 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2020-10-20 08:00:48,194 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 08:00:48,194 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 08:00:48,195 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2020-10-20 08:00:48,195 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 08:00:48,202 INFO L794 eck$LassoCheckResult]: Stem: 26#ULTIMATE.startENTRYtrue #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(18);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 12#L-1true havoc main_#res;havoc main_#t~ret11, main_~x~0, main_~result~0;main_~x~0 := 6; 22#L39true call main_#t~ret11 := fibo1(main_~x~0);< 27#fibo1ENTRYtrue [2020-10-20 08:00:48,202 INFO L796 eck$LassoCheckResult]: Loop: 27#fibo1ENTRYtrue ~n := #in~n; 4#L10true assume !(~n < 1); 10#L12true assume !(1 == ~n); 13#L15true call #t~ret7 := fibo2(~n - 1);< 15#fibo2ENTRYtrue ~n := #in~n; 28#L20true assume !(~n < 1); 20#L22true assume !(1 == ~n); 9#L25true call #t~ret9 := fibo1(~n - 1);< 27#fibo1ENTRYtrue [2020-10-20 08:00:48,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:48,208 INFO L82 PathProgramCache]: Analyzing trace with hash 29898, now seen corresponding path program 1 times [2020-10-20 08:00:48,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:00:48,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508629308] [2020-10-20 08:00:48,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:00:48,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:00:48,321 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:00:48,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:00:48,340 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:00:48,363 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 08:00:48,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:48,365 INFO L82 PathProgramCache]: Analyzing trace with hash 1206117480, now seen corresponding path program 1 times [2020-10-20 08:00:48,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:00:48,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911709633] [2020-10-20 08:00:48,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:00:48,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:00:48,374 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:00:48,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:00:48,380 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:00:48,382 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 08:00:48,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:48,384 INFO L82 PathProgramCache]: Analyzing trace with hash -1276411855, now seen corresponding path program 1 times [2020-10-20 08:00:48,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:00:48,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859922257] [2020-10-20 08:00:48,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:00:48,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:00:48,405 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:00:48,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:00:48,425 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:00:48,432 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 08:00:48,664 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 08:00:48,665 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 08:00:48,665 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 08:00:48,665 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 08:00:48,665 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-20 08:00:48,666 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:48,666 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 08:00:48,666 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 08:00:48,666 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_6-2.c_Iteration1_Loop [2020-10-20 08:00:48,667 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 08:00:48,667 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 08:00:48,687 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:48,694 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:48,697 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:48,707 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:48,711 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:48,715 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:48,720 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:48,723 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:48,729 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:48,744 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:48,845 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 08:00:48,846 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:00:48,862 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:00:48,862 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:48,873 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:00:48,873 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#res=0} Honda state: {fibo2_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:48,928 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:00:48,928 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:00:48,936 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:00:48,936 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#res=0} Honda state: {fibo1_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:00:48,976 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:00:48,976 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:48,988 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:00:48,988 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#in~n=0} Honda state: {fibo2_#in~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:49,032 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:00:49,032 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:00:49,036 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:00:49,036 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#t~ret7=0} Honda state: {fibo1_#t~ret7=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:49,066 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:00:49,067 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:00:49,073 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:00:49,073 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#t~ret8=0} Honda state: {fibo1_#t~ret8=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:49,099 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:00:49,099 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:00:49,109 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:00:49,109 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_~n=0} Honda state: {fibo2_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:49,136 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:00:49,136 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:00:49,141 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:00:49,142 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_~n=0} Honda state: {fibo1_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:49,173 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:00:49,174 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:00:49,183 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:00:49,184 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#t~ret9=0} Honda state: {fibo2_#t~ret9=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:49,210 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:00:49,211 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:49,237 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-20 08:00:49,237 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:00:49,298 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-20 08:00:49,301 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 08:00:49,302 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 08:00:49,302 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 08:00:49,302 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 08:00:49,302 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-20 08:00:49,302 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:49,302 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 08:00:49,302 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 08:00:49,304 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_6-2.c_Iteration1_Loop [2020-10-20 08:00:49,304 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 08:00:49,304 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 08:00:49,306 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:49,310 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:49,313 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:49,318 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:49,321 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:49,324 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:49,327 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:49,330 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:49,333 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:49,344 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:49,432 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 08:00:49,438 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:00:49,451 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 08:00:49,454 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:00:49,455 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:00:49,455 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:00:49,456 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:00:49,456 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:00:49,458 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:00:49,458 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:49,461 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:49,496 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 08:00:49,497 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:00:49,498 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:00:49,498 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:00:49,498 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:00:49,498 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:00:49,499 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:00:49,499 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:00:49,500 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:49,545 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 08:00:49,547 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:00:49,548 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:00:49,548 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:00:49,548 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:00:49,548 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:00:49,549 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:00:49,549 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:00:49,555 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:49,603 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 08:00:49,605 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:00:49,606 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:00:49,606 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:00:49,606 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:00:49,607 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:00:49,608 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:00:49,608 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:00:49,612 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:00:49,662 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 08:00:49,665 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:00:49,665 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:00:49,665 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:00:49,666 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:00:49,666 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:00:49,667 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:00:49,667 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:49,673 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:00:49,726 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 08:00:49,729 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:00:49,730 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:00:49,730 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:00:49,730 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:00:49,730 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:00:49,731 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:00:49,731 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:49,733 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:00:49,786 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 08:00:49,788 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:00:49,788 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:00:49,788 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:00:49,788 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:00:49,788 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:00:49,789 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:00:49,789 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:49,791 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:00:49,838 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 08:00:49,840 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:00:49,840 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:00:49,840 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:00:49,840 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:00:49,840 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:00:49,841 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:00:49,841 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:49,843 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:00:49,895 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 08:00:49,896 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:00:49,897 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:00:49,897 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:00:49,897 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:00:49,897 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:00:49,899 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:00:49,899 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:49,902 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-20 08:00:49,906 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2020-10-20 08:00:49,907 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:00:49,928 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-20 08:00:49,929 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-20 08:00:49,929 INFO L510 LassoAnalysis]: Proved termination. [2020-10-20 08:00:49,930 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo1_#in~n) = 1*fibo1_#in~n Supporting invariants [] Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:49,973 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-20 08:00:50,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:50,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:50,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-20 08:00:50,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:50,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:50,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-20 08:00:50,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:50,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 08:00:50,261 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 [2020-10-20 08:00:50,263 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 27 states. Second operand 6 states. [2020-10-20 08:00:50,501 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 27 states.. Second operand 6 states. Result 85 states and 117 transitions. Complement of second has 24 states. [2020-10-20 08:00:50,501 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 [2020-10-20 08:00:50,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-20 08:00:50,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 21 transitions. [2020-10-20 08:00:50,507 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 21 transitions. Stem has 3 letters. Loop has 8 letters. [2020-10-20 08:00:50,509 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:00:50,509 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 21 transitions. Stem has 11 letters. Loop has 8 letters. [2020-10-20 08:00:50,510 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:00:50,510 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 21 transitions. Stem has 3 letters. Loop has 16 letters. [2020-10-20 08:00:50,510 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:00:50,511 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 85 states and 117 transitions. [2020-10-20 08:00:50,521 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2020-10-20 08:00:50,535 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 85 states to 61 states and 82 transitions. [2020-10-20 08:00:50,539 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 39 [2020-10-20 08:00:50,540 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 40 [2020-10-20 08:00:50,541 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 82 transitions. [2020-10-20 08:00:50,543 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 08:00:50,544 INFO L691 BuchiCegarLoop]: Abstraction has 61 states and 82 transitions. [2020-10-20 08:00:50,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states and 82 transitions. [2020-10-20 08:00:50,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 54. [2020-10-20 08:00:50,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-20 08:00:50,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 72 transitions. [2020-10-20 08:00:50,602 INFO L714 BuchiCegarLoop]: Abstraction has 54 states and 72 transitions. [2020-10-20 08:00:50,602 INFO L594 BuchiCegarLoop]: Abstraction has 54 states and 72 transitions. [2020-10-20 08:00:50,602 INFO L427 BuchiCegarLoop]: ======== Iteration 2============ [2020-10-20 08:00:50,602 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 54 states and 72 transitions. [2020-10-20 08:00:50,608 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2020-10-20 08:00:50,608 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 08:00:50,608 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 08:00:50,611 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 08:00:50,611 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 08:00:50,612 INFO L794 eck$LassoCheckResult]: Stem: 234#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(18);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 230#L-1 havoc main_#res;havoc main_#t~ret11, main_~x~0, main_~result~0;main_~x~0 := 6; 216#L39 call main_#t~ret11 := fibo1(main_~x~0);< 222#fibo1ENTRY ~n := #in~n; 215#L10 assume !(~n < 1); 217#L12 assume !(1 == ~n); 201#L15 call #t~ret7 := fibo2(~n - 1);< 233#fibo2ENTRY ~n := #in~n; 237#L20 assume !(~n < 1); 251#L22 assume !(1 == ~n); 212#L25 call #t~ret9 := fibo1(~n - 1);< 227#fibo1ENTRY ~n := #in~n; 211#L10 assume ~n < 1;#res := 0; 213#fibo1FINAL assume true; 220#fibo1EXIT >#48#return; 221#L25-1 [2020-10-20 08:00:50,612 INFO L796 eck$LassoCheckResult]: Loop: 221#L25-1 call #t~ret10 := fibo1(~n - 2);< 226#fibo1ENTRY ~n := #in~n; 246#L10 assume !(~n < 1); 247#L12 assume !(1 == ~n); 200#L15 call #t~ret7 := fibo2(~n - 1);< 239#fibo2ENTRY ~n := #in~n; 244#L20 assume !(~n < 1); 243#L22 assume !(1 == ~n); 224#L25 call #t~ret9 := fibo1(~n - 1);< 226#fibo1ENTRY ~n := #in~n; 246#L10 assume ~n < 1;#res := 0; 225#fibo1FINAL assume true; 229#fibo1EXIT >#48#return; 221#L25-1 [2020-10-20 08:00:50,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:50,612 INFO L82 PathProgramCache]: Analyzing trace with hash -722660232, now seen corresponding path program 1 times [2020-10-20 08:00:50,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:00:50,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579844904] [2020-10-20 08:00:50,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:00:50,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:50,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-20 08:00:50,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:50,780 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-20 08:00:50,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579844904] [2020-10-20 08:00:50,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 08:00:50,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-20 08:00:50,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387860765] [2020-10-20 08:00:50,785 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-20 08:00:50,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:50,786 INFO L82 PathProgramCache]: Analyzing trace with hash -880179458, now seen corresponding path program 1 times [2020-10-20 08:00:50,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:00:50,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961209666] [2020-10-20 08:00:50,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:00:50,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:50,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-20 08:00:50,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:50,830 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-20 08:00:50,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961209666] [2020-10-20 08:00:50,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 08:00:50,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-20 08:00:50,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116378208] [2020-10-20 08:00:50,831 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-10-20 08:00:50,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 08:00:50,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-20 08:00:50,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-20 08:00:50,836 INFO L87 Difference]: Start difference. First operand 54 states and 72 transitions. cyclomatic complexity: 20 Second operand 6 states. [2020-10-20 08:00:50,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 08:00:50,913 INFO L93 Difference]: Finished difference Result 68 states and 88 transitions. [2020-10-20 08:00:50,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-20 08:00:50,914 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 68 states and 88 transitions. [2020-10-20 08:00:50,917 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2020-10-20 08:00:50,920 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 68 states to 66 states and 86 transitions. [2020-10-20 08:00:50,920 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 46 [2020-10-20 08:00:50,921 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 46 [2020-10-20 08:00:50,921 INFO L73 IsDeterministic]: Start isDeterministic. Operand 66 states and 86 transitions. [2020-10-20 08:00:50,921 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 08:00:50,921 INFO L691 BuchiCegarLoop]: Abstraction has 66 states and 86 transitions. [2020-10-20 08:00:50,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states and 86 transitions. [2020-10-20 08:00:50,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 58. [2020-10-20 08:00:50,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-20 08:00:50,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 76 transitions. [2020-10-20 08:00:50,929 INFO L714 BuchiCegarLoop]: Abstraction has 58 states and 76 transitions. [2020-10-20 08:00:50,929 INFO L594 BuchiCegarLoop]: Abstraction has 58 states and 76 transitions. [2020-10-20 08:00:50,929 INFO L427 BuchiCegarLoop]: ======== Iteration 3============ [2020-10-20 08:00:50,929 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 58 states and 76 transitions. [2020-10-20 08:00:50,931 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2020-10-20 08:00:50,931 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 08:00:50,931 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 08:00:50,932 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 08:00:50,932 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 08:00:50,933 INFO L794 eck$LassoCheckResult]: Stem: 375#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(18);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 374#L-1 havoc main_#res;havoc main_#t~ret11, main_~x~0, main_~result~0;main_~x~0 := 6; 355#L39 call main_#t~ret11 := fibo1(main_~x~0);< 364#fibo1ENTRY ~n := #in~n; 354#L10 assume !(~n < 1); 356#L12 assume !(1 == ~n); 346#L15 call #t~ret7 := fibo2(~n - 1);< 378#fibo2ENTRY ~n := #in~n; 399#L20 assume !(~n < 1); 400#L22 assume !(1 == ~n); 352#L25 call #t~ret9 := fibo1(~n - 1);< 371#fibo1ENTRY ~n := #in~n; 351#L10 assume !(~n < 1); 353#L12 assume 1 == ~n;#res := 1; 372#fibo1FINAL assume true; 365#fibo1EXIT >#48#return; 366#L25-1 [2020-10-20 08:00:50,933 INFO L796 eck$LassoCheckResult]: Loop: 366#L25-1 call #t~ret10 := fibo1(~n - 2);< 370#fibo1ENTRY ~n := #in~n; 389#L10 assume !(~n < 1); 390#L12 assume !(1 == ~n); 344#L15 call #t~ret7 := fibo2(~n - 1);< 388#fibo2ENTRY ~n := #in~n; 395#L20 assume !(~n < 1); 393#L22 assume !(1 == ~n); 368#L25 call #t~ret9 := fibo1(~n - 1);< 370#fibo1ENTRY ~n := #in~n; 389#L10 assume !(~n < 1); 390#L12 assume 1 == ~n;#res := 1; 369#fibo1FINAL assume true; 373#fibo1EXIT >#48#return; 366#L25-1 [2020-10-20 08:00:50,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:50,933 INFO L82 PathProgramCache]: Analyzing trace with hash -927605802, now seen corresponding path program 1 times [2020-10-20 08:00:50,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:00:50,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107412278] [2020-10-20 08:00:50,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:00:50,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:51,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-20 08:00:51,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:51,039 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 08:00:51,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107412278] [2020-10-20 08:00:51,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079767870] [2020-10-20 08:00:51,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 08:00:51,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:51,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-20 08:00:51,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:51,112 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 08:00:51,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 08:00:51,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-20 08:00:51,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055619954] [2020-10-20 08:00:51,113 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-20 08:00:51,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:51,114 INFO L82 PathProgramCache]: Analyzing trace with hash -1515734512, now seen corresponding path program 1 times [2020-10-20 08:00:51,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:00:51,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481710765] [2020-10-20 08:00:51,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:00:51,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:00:51,120 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:00:51,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:00:51,125 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:00:51,128 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 08:00:51,306 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 08:00:51,307 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 08:00:51,307 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 08:00:51,307 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 08:00:51,307 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-20 08:00:51,307 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:51,307 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 08:00:51,307 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 08:00:51,307 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_6-2.c_Iteration3_Loop [2020-10-20 08:00:51,307 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 08:00:51,308 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 08:00:51,310 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:51,315 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:51,320 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:51,323 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:51,326 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:51,334 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:51,336 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:51,339 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:51,343 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:51,416 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 08:00:51,417 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:00:51,423 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:00:51,423 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:51,428 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:00:51,428 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#t~ret7=0} Honda state: {fibo1_#t~ret7=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:00:51,456 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:00:51,456 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:00:51,460 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:00:51,460 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#t~ret8=0} Honda state: {fibo1_#t~ret8=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:51,484 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:00:51,485 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:00:51,487 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:00:51,488 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#in~n=0} Honda state: {fibo1_#in~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:51,517 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:00:51,517 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:00:51,520 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:00:51,520 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_~n=0} Honda state: {fibo1_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:51,544 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:00:51,544 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:51,571 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-20 08:00:51,571 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:00:52,170 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-20 08:00:52,172 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 08:00:52,172 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 08:00:52,173 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 08:00:52,173 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 08:00:52,173 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-20 08:00:52,173 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:52,173 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 08:00:52,173 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 08:00:52,174 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_6-2.c_Iteration3_Loop [2020-10-20 08:00:52,174 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 08:00:52,174 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 08:00:52,175 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:52,181 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:52,183 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:52,186 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:52,193 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:52,196 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:52,198 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:52,201 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:52,207 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:52,287 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 08:00:52,287 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:52,289 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 08:00:52,291 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:00:52,291 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:00:52,291 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:00:52,291 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:00:52,291 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:00:52,292 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:00:52,292 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:00:52,293 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:52,317 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 08:00:52,318 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:00:52,318 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:00:52,318 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:00:52,318 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:00:52,318 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:00:52,319 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:00:52,319 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:00:52,320 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:52,346 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 08:00:52,347 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:00:52,347 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:00:52,348 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:00:52,348 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:00:52,348 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:00:52,348 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:00:52,348 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:00:52,349 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:52,374 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 08:00:52,376 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:00:52,376 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:00:52,376 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:00:52,376 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:00:52,376 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:00:52,377 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:00:52,378 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:00:52,381 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-20 08:00:52,400 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-20 08:00:52,400 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:00:52,403 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-20 08:00:52,404 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-20 08:00:52,404 INFO L510 LassoAnalysis]: Proved termination. [2020-10-20 08:00:52,404 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo2_~n) = 1*fibo2_~n Supporting invariants [] Waiting until toolchain timeout for monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:52,443 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-20 08:00:52,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:52,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:52,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-20 08:00:52,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:52,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:52,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-20 08:00:52,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:52,701 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 08:00:52,702 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 [2020-10-20 08:00:52,702 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 58 states and 76 transitions. cyclomatic complexity: 20 Second operand 10 states. [2020-10-20 08:00:53,223 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 58 states and 76 transitions. cyclomatic complexity: 20. Second operand 10 states. Result 191 states and 263 transitions. Complement of second has 40 states. [2020-10-20 08:00:53,225 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 [2020-10-20 08:00:53,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-10-20 08:00:53,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 73 transitions. [2020-10-20 08:00:53,227 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 73 transitions. Stem has 16 letters. Loop has 14 letters. [2020-10-20 08:00:53,229 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:00:53,229 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 73 transitions. Stem has 30 letters. Loop has 14 letters. [2020-10-20 08:00:53,230 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:00:53,230 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 73 transitions. Stem has 16 letters. Loop has 28 letters. [2020-10-20 08:00:53,231 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:00:53,231 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 191 states and 263 transitions. [2020-10-20 08:00:53,238 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 20 [2020-10-20 08:00:53,246 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 191 states to 169 states and 237 transitions. [2020-10-20 08:00:53,247 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 103 [2020-10-20 08:00:53,247 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 106 [2020-10-20 08:00:53,248 INFO L73 IsDeterministic]: Start isDeterministic. Operand 169 states and 237 transitions. [2020-10-20 08:00:53,249 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 08:00:53,249 INFO L691 BuchiCegarLoop]: Abstraction has 169 states and 237 transitions. [2020-10-20 08:00:53,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states and 237 transitions. [2020-10-20 08:00:53,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 152. [2020-10-20 08:00:53,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-10-20 08:00:53,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 206 transitions. [2020-10-20 08:00:53,271 INFO L714 BuchiCegarLoop]: Abstraction has 152 states and 206 transitions. [2020-10-20 08:00:53,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 08:00:53,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-20 08:00:53,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-20 08:00:53,272 INFO L87 Difference]: Start difference. First operand 152 states and 206 transitions. Second operand 10 states. [2020-10-20 08:00:53,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 08:00:53,482 INFO L93 Difference]: Finished difference Result 183 states and 244 transitions. [2020-10-20 08:00:53,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-20 08:00:53,484 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 183 states and 244 transitions. [2020-10-20 08:00:53,498 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 20 [2020-10-20 08:00:53,509 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 183 states to 180 states and 240 transitions. [2020-10-20 08:00:53,509 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 117 [2020-10-20 08:00:53,510 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 117 [2020-10-20 08:00:53,512 INFO L73 IsDeterministic]: Start isDeterministic. Operand 180 states and 240 transitions. [2020-10-20 08:00:53,513 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 08:00:53,513 INFO L691 BuchiCegarLoop]: Abstraction has 180 states and 240 transitions. [2020-10-20 08:00:53,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states and 240 transitions. [2020-10-20 08:00:53,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 167. [2020-10-20 08:00:53,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-20 08:00:53,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 225 transitions. [2020-10-20 08:00:53,552 INFO L714 BuchiCegarLoop]: Abstraction has 167 states and 225 transitions. [2020-10-20 08:00:53,552 INFO L594 BuchiCegarLoop]: Abstraction has 167 states and 225 transitions. [2020-10-20 08:00:53,552 INFO L427 BuchiCegarLoop]: ======== Iteration 4============ [2020-10-20 08:00:53,553 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 167 states and 225 transitions. [2020-10-20 08:00:53,561 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 20 [2020-10-20 08:00:53,562 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 08:00:53,562 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 08:00:53,569 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [8, 7, 6, 6, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2020-10-20 08:00:53,569 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [6, 5, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2020-10-20 08:00:53,570 INFO L794 eck$LassoCheckResult]: Stem: 1219#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(18);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 1214#L-1 havoc main_#res;havoc main_#t~ret11, main_~x~0, main_~result~0;main_~x~0 := 6; 1192#L39 call main_#t~ret11 := fibo1(main_~x~0);< 1193#fibo1ENTRY ~n := #in~n; 1257#L10 assume !(~n < 1); 1206#L12 assume !(1 == ~n); 1159#L15 call #t~ret7 := fibo2(~n - 1);< 1216#fibo2ENTRY ~n := #in~n; 1221#L20 assume !(~n < 1); 1175#L22 assume !(1 == ~n); 1176#L25 call #t~ret9 := fibo1(~n - 1);< 1205#fibo1ENTRY ~n := #in~n; 1182#L10 assume !(~n < 1); 1184#L12 assume !(1 == ~n); 1203#L15 call #t~ret7 := fibo2(~n - 1);< 1259#fibo2ENTRY ~n := #in~n; 1261#L20 assume !(~n < 1); 1262#L22 assume !(1 == ~n); 1183#L25 call #t~ret9 := fibo1(~n - 1);< 1205#fibo1ENTRY ~n := #in~n; 1182#L10 assume !(~n < 1); 1184#L12 assume !(1 == ~n); 1203#L15 call #t~ret7 := fibo2(~n - 1);< 1259#fibo2ENTRY ~n := #in~n; 1261#L20 assume ~n < 1;#res := 0; 1260#fibo2FINAL assume true; 1258#fibo2EXIT >#52#return; 1204#L15-1 call #t~ret8 := fibo2(~n - 2);< 1223#fibo2ENTRY ~n := #in~n; 1317#L20 assume !(~n < 1); 1316#L22 assume !(1 == ~n); 1183#L25 call #t~ret9 := fibo1(~n - 1);< 1205#fibo1ENTRY ~n := #in~n; 1256#L10 assume !(~n < 1); 1263#L12 assume 1 == ~n;#res := 1; 1264#fibo1FINAL assume true; 1251#fibo1EXIT >#48#return; 1208#L25-1 call #t~ret10 := fibo1(~n - 2);< 1213#fibo1ENTRY ~n := #in~n; 1249#L10 assume !(~n < 1); 1247#L12 assume !(1 == ~n); 1212#L15 call #t~ret7 := fibo2(~n - 1);< 1246#fibo2ENTRY ~n := #in~n; 1243#L20 assume ~n < 1;#res := 0; 1244#fibo2FINAL assume true; 1248#fibo2EXIT >#52#return; 1211#L15-1 call #t~ret8 := fibo2(~n - 2);< 1246#fibo2ENTRY ~n := #in~n; 1243#L20 assume !(~n < 1); 1239#L22 assume 1 == ~n;#res := 1; 1240#fibo2FINAL assume true; 1308#fibo2EXIT >#54#return; 1307#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 1319#fibo1FINAL assume true; 1318#fibo1EXIT >#50#return; 1188#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret9;havoc #t~ret10; 1311#fibo2FINAL assume true; 1309#fibo2EXIT >#54#return; 1307#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 1319#fibo1FINAL assume true; 1318#fibo1EXIT >#48#return; 1186#L25-1 call #t~ret10 := fibo1(~n - 2);< 1300#fibo1ENTRY ~n := #in~n; 1298#L10 assume !(~n < 1); 1296#L12 assume !(1 == ~n); 1170#L15 call #t~ret7 := fibo2(~n - 1);< 1215#fibo2ENTRY ~n := #in~n; 1220#L20 assume ~n < 1;#res := 0; 1173#fibo2FINAL assume true; 1310#fibo2EXIT >#52#return; 1172#L15-1 call #t~ret8 := fibo2(~n - 2);< 1215#fibo2ENTRY ~n := #in~n; 1220#L20 assume ~n < 1;#res := 0; 1173#fibo2FINAL assume true; 1310#fibo2EXIT >#54#return; 1307#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 1319#fibo1FINAL assume true; 1318#fibo1EXIT >#50#return; 1188#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret9;havoc #t~ret10; 1311#fibo2FINAL assume true; 1309#fibo2EXIT >#52#return; 1172#L15-1 [2020-10-20 08:00:53,571 INFO L796 eck$LassoCheckResult]: Loop: 1172#L15-1 call #t~ret8 := fibo2(~n - 2);< 1215#fibo2ENTRY ~n := #in~n; 1220#L20 assume !(~n < 1); 1169#L22 assume !(1 == ~n); 1174#L25 call #t~ret9 := fibo1(~n - 1);< 1300#fibo1ENTRY ~n := #in~n; 1298#L10 assume !(~n < 1); 1296#L12 assume !(1 == ~n); 1170#L15 call #t~ret7 := fibo2(~n - 1);< 1215#fibo2ENTRY ~n := #in~n; 1220#L20 assume !(~n < 1); 1169#L22 assume !(1 == ~n); 1174#L25 call #t~ret9 := fibo1(~n - 1);< 1300#fibo1ENTRY ~n := #in~n; 1298#L10 assume !(~n < 1); 1296#L12 assume !(1 == ~n); 1170#L15 call #t~ret7 := fibo2(~n - 1);< 1215#fibo2ENTRY ~n := #in~n; 1220#L20 assume ~n < 1;#res := 0; 1173#fibo2FINAL assume true; 1310#fibo2EXIT >#52#return; 1172#L15-1 call #t~ret8 := fibo2(~n - 2);< 1215#fibo2ENTRY ~n := #in~n; 1220#L20 assume ~n < 1;#res := 0; 1173#fibo2FINAL assume true; 1310#fibo2EXIT >#54#return; 1307#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 1319#fibo1FINAL assume true; 1318#fibo1EXIT >#48#return; 1186#L25-1 call #t~ret10 := fibo1(~n - 2);< 1300#fibo1ENTRY ~n := #in~n; 1298#L10 assume !(~n < 1); 1296#L12 assume !(1 == ~n); 1170#L15 call #t~ret7 := fibo2(~n - 1);< 1215#fibo2ENTRY ~n := #in~n; 1220#L20 assume ~n < 1;#res := 0; 1173#fibo2FINAL assume true; 1310#fibo2EXIT >#52#return; 1172#L15-1 call #t~ret8 := fibo2(~n - 2);< 1215#fibo2ENTRY ~n := #in~n; 1220#L20 assume ~n < 1;#res := 0; 1173#fibo2FINAL assume true; 1310#fibo2EXIT >#54#return; 1307#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 1319#fibo1FINAL assume true; 1318#fibo1EXIT >#50#return; 1188#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret9;havoc #t~ret10; 1311#fibo2FINAL assume true; 1309#fibo2EXIT >#52#return; 1172#L15-1 [2020-10-20 08:00:53,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:53,571 INFO L82 PathProgramCache]: Analyzing trace with hash -1380034771, now seen corresponding path program 1 times [2020-10-20 08:00:53,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:00:53,572 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101264092] [2020-10-20 08:00:53,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:00:53,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:53,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-20 08:00:53,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:53,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 08:00:53,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:53,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 08:00:53,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:53,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-20 08:00:53,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:53,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 08:00:53,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:53,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-20 08:00:53,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:53,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 08:00:53,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:53,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-20 08:00:53,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:53,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-20 08:00:53,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:53,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 08:00:53,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:53,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-20 08:00:53,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:53,854 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 24 proven. 74 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-10-20 08:00:53,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101264092] [2020-10-20 08:00:53,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807923350] [2020-10-20 08:00:53,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 08:00:53,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:53,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-20 08:00:53,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:54,189 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 17 proven. 91 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2020-10-20 08:00:54,189 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 08:00:54,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2020-10-20 08:00:54,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664058888] [2020-10-20 08:00:54,191 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-20 08:00:54,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:54,191 INFO L82 PathProgramCache]: Analyzing trace with hash -1411437133, now seen corresponding path program 1 times [2020-10-20 08:00:54,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:00:54,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135179215] [2020-10-20 08:00:54,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:00:54,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:54,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-20 08:00:54,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:54,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 08:00:54,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:54,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 08:00:54,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:54,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-20 08:00:54,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:54,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-20 08:00:54,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:54,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 08:00:54,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:54,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-20 08:00:54,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:54,283 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 13 proven. 15 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-10-20 08:00:54,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135179215] [2020-10-20 08:00:54,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39181203] [2020-10-20 08:00:54,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 08:00:54,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:54,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-20 08:00:54,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:54,438 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 18 proven. 16 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-20 08:00:54,439 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 08:00:54,439 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9] total 12 [2020-10-20 08:00:54,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881662715] [2020-10-20 08:00:54,440 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-10-20 08:00:54,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 08:00:54,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-20 08:00:54,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-20 08:00:54,441 INFO L87 Difference]: Start difference. First operand 167 states and 225 transitions. cyclomatic complexity: 63 Second operand 12 states. [2020-10-20 08:00:54,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 08:00:54,763 INFO L93 Difference]: Finished difference Result 223 states and 293 transitions. [2020-10-20 08:00:54,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-20 08:00:54,764 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 223 states and 293 transitions. [2020-10-20 08:00:54,770 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 20 [2020-10-20 08:00:54,775 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 223 states to 200 states and 262 transitions. [2020-10-20 08:00:54,775 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 134 [2020-10-20 08:00:54,776 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 134 [2020-10-20 08:00:54,776 INFO L73 IsDeterministic]: Start isDeterministic. Operand 200 states and 262 transitions. [2020-10-20 08:00:54,776 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 08:00:54,776 INFO L691 BuchiCegarLoop]: Abstraction has 200 states and 262 transitions. [2020-10-20 08:00:54,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states and 262 transitions. [2020-10-20 08:00:54,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 184. [2020-10-20 08:00:54,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-10-20 08:00:54,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 238 transitions. [2020-10-20 08:00:54,794 INFO L714 BuchiCegarLoop]: Abstraction has 184 states and 238 transitions. [2020-10-20 08:00:54,794 INFO L594 BuchiCegarLoop]: Abstraction has 184 states and 238 transitions. [2020-10-20 08:00:54,794 INFO L427 BuchiCegarLoop]: ======== Iteration 5============ [2020-10-20 08:00:54,794 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 184 states and 238 transitions. [2020-10-20 08:00:54,796 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 20 [2020-10-20 08:00:54,796 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 08:00:54,796 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 08:00:54,799 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 08:00:54,799 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [6, 5, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2020-10-20 08:00:54,799 INFO L794 eck$LassoCheckResult]: Stem: 2335#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(18);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 2326#L-1 havoc main_#res;havoc main_#t~ret11, main_~x~0, main_~result~0;main_~x~0 := 6; 2285#L39 call main_#t~ret11 := fibo1(main_~x~0);< 2307#fibo1ENTRY ~n := #in~n; 2284#L10 assume !(~n < 1); 2286#L12 assume !(1 == ~n); 2317#L15 call #t~ret7 := fibo2(~n - 1);< 2334#fibo2ENTRY ~n := #in~n; 2424#L20 assume !(~n < 1); 2421#L22 assume !(1 == ~n); 2316#L25 call #t~ret9 := fibo1(~n - 1);< 2318#fibo1ENTRY ~n := #in~n; 2367#L10 assume !(~n < 1); 2366#L12 assume !(1 == ~n); 2272#L15 call #t~ret7 := fibo2(~n - 1);< 2353#fibo2ENTRY ~n := #in~n; 2374#L20 assume !(~n < 1); 2372#L22 assume !(1 == ~n); 2295#L25 call #t~ret9 := fibo1(~n - 1);< 2318#fibo1ENTRY ~n := #in~n; 2375#L10 assume !(~n < 1); 2386#L12 assume 1 == ~n;#res := 1; 2387#fibo1FINAL assume true; 2448#fibo1EXIT >#48#return; 2328#L25-1 call #t~ret10 := fibo1(~n - 2);< 2327#fibo1ENTRY ~n := #in~n; 2329#L10 assume ~n < 1;#res := 0; 2451#fibo1FINAL assume true; 2450#fibo1EXIT >#50#return; 2271#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret9;havoc #t~ret10; 2274#fibo2FINAL assume true; 2398#fibo2EXIT >#52#return; 2339#L15-1 [2020-10-20 08:00:54,799 INFO L796 eck$LassoCheckResult]: Loop: 2339#L15-1 call #t~ret8 := fibo2(~n - 2);< 2336#fibo2ENTRY ~n := #in~n; 2340#L20 assume !(~n < 1); 2422#L22 assume !(1 == ~n); 2403#L25 call #t~ret9 := fibo1(~n - 1);< 2415#fibo1ENTRY ~n := #in~n; 2426#L10 assume !(~n < 1); 2418#L12 assume !(1 == ~n); 2337#L15 call #t~ret7 := fibo2(~n - 1);< 2336#fibo2ENTRY ~n := #in~n; 2340#L20 assume !(~n < 1); 2422#L22 assume !(1 == ~n); 2403#L25 call #t~ret9 := fibo1(~n - 1);< 2415#fibo1ENTRY ~n := #in~n; 2426#L10 assume !(~n < 1); 2418#L12 assume !(1 == ~n); 2337#L15 call #t~ret7 := fibo2(~n - 1);< 2336#fibo2ENTRY ~n := #in~n; 2340#L20 assume !(~n < 1); 2422#L22 assume 1 == ~n;#res := 1; 2423#fibo2FINAL assume true; 2408#fibo2EXIT >#52#return; 2339#L15-1 call #t~ret8 := fibo2(~n - 2);< 2336#fibo2ENTRY ~n := #in~n; 2340#L20 assume ~n < 1;#res := 0; 2425#fibo2FINAL assume true; 2428#fibo2EXIT >#54#return; 2399#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 2420#fibo1FINAL assume true; 2413#fibo1EXIT >#48#return; 2404#L25-1 call #t~ret10 := fibo1(~n - 2);< 2415#fibo1ENTRY ~n := #in~n; 2426#L10 assume !(~n < 1); 2418#L12 assume !(1 == ~n); 2337#L15 call #t~ret7 := fibo2(~n - 1);< 2336#fibo2ENTRY ~n := #in~n; 2340#L20 assume !(~n < 1); 2422#L22 assume 1 == ~n;#res := 1; 2423#fibo2FINAL assume true; 2408#fibo2EXIT >#52#return; 2339#L15-1 call #t~ret8 := fibo2(~n - 2);< 2336#fibo2ENTRY ~n := #in~n; 2340#L20 assume ~n < 1;#res := 0; 2425#fibo2FINAL assume true; 2428#fibo2EXIT >#54#return; 2399#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 2420#fibo1FINAL assume true; 2413#fibo1EXIT >#50#return; 2409#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret9;havoc #t~ret10; 2406#fibo2FINAL assume true; 2402#fibo2EXIT >#52#return; 2339#L15-1 [2020-10-20 08:00:54,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:54,800 INFO L82 PathProgramCache]: Analyzing trace with hash -658151768, now seen corresponding path program 1 times [2020-10-20 08:00:54,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:00:54,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240149002] [2020-10-20 08:00:54,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:00:54,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:54,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-20 08:00:54,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:54,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 08:00:54,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:54,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-20 08:00:54,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:54,935 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-20 08:00:54,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240149002] [2020-10-20 08:00:54,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487415362] [2020-10-20 08:00:54,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 08:00:54,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:54,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-20 08:00:54,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:55,015 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-20 08:00:55,015 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 08:00:55,015 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2020-10-20 08:00:55,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116710898] [2020-10-20 08:00:55,016 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-20 08:00:55,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:55,017 INFO L82 PathProgramCache]: Analyzing trace with hash -1108085027, now seen corresponding path program 1 times [2020-10-20 08:00:55,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:00:55,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894687959] [2020-10-20 08:00:55,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:00:55,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:55,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-20 08:00:55,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:55,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 08:00:55,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:55,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 08:00:55,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:55,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-20 08:00:55,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:55,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-20 08:00:55,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:55,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 08:00:55,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:55,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-20 08:00:55,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:55,142 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2020-10-20 08:00:55,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894687959] [2020-10-20 08:00:55,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943642428] [2020-10-20 08:00:55,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 08:00:55,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:55,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-20 08:00:55,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:55,256 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 27 proven. 20 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-20 08:00:55,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 08:00:55,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 14 [2020-10-20 08:00:55,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024805040] [2020-10-20 08:00:55,257 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-10-20 08:00:55,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 08:00:55,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-20 08:00:55,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2020-10-20 08:00:55,258 INFO L87 Difference]: Start difference. First operand 184 states and 238 transitions. cyclomatic complexity: 59 Second operand 15 states. [2020-10-20 08:00:55,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 08:00:55,554 INFO L93 Difference]: Finished difference Result 206 states and 270 transitions. [2020-10-20 08:00:55,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-20 08:00:55,555 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 206 states and 270 transitions. [2020-10-20 08:00:55,559 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 20 [2020-10-20 08:00:55,563 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 206 states to 203 states and 266 transitions. [2020-10-20 08:00:55,563 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 133 [2020-10-20 08:00:55,564 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 133 [2020-10-20 08:00:55,564 INFO L73 IsDeterministic]: Start isDeterministic. Operand 203 states and 266 transitions. [2020-10-20 08:00:55,564 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 08:00:55,564 INFO L691 BuchiCegarLoop]: Abstraction has 203 states and 266 transitions. [2020-10-20 08:00:55,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states and 266 transitions. [2020-10-20 08:00:55,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 194. [2020-10-20 08:00:55,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-10-20 08:00:55,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 251 transitions. [2020-10-20 08:00:55,577 INFO L714 BuchiCegarLoop]: Abstraction has 194 states and 251 transitions. [2020-10-20 08:00:55,577 INFO L594 BuchiCegarLoop]: Abstraction has 194 states and 251 transitions. [2020-10-20 08:00:55,577 INFO L427 BuchiCegarLoop]: ======== Iteration 6============ [2020-10-20 08:00:55,577 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 194 states and 251 transitions. [2020-10-20 08:00:55,579 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 20 [2020-10-20 08:00:55,580 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 08:00:55,580 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 08:00:55,582 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [5, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 08:00:55,582 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [6, 5, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2020-10-20 08:00:55,582 INFO L794 eck$LassoCheckResult]: Stem: 3123#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(18);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 3122#L-1 havoc main_#res;havoc main_#t~ret11, main_~x~0, main_~result~0;main_~x~0 := 6; 3080#L39 call main_#t~ret11 := fibo1(main_~x~0);< 3097#fibo1ENTRY ~n := #in~n; 3079#L10 assume !(~n < 1); 3081#L12 assume !(1 == ~n); 3090#L15 call #t~ret7 := fibo2(~n - 1);< 3130#fibo2ENTRY ~n := #in~n; 3133#L20 assume !(~n < 1); 3089#L22 assume !(1 == ~n); 3091#L25 call #t~ret9 := fibo1(~n - 1);< 3115#fibo1ENTRY ~n := #in~n; 3192#L10 assume !(~n < 1); 3191#L12 assume !(1 == ~n); 3095#L15 call #t~ret7 := fibo2(~n - 1);< 3149#fibo2ENTRY ~n := #in~n; 3180#L20 assume !(~n < 1); 3178#L22 assume !(1 == ~n); 3136#L25 call #t~ret9 := fibo1(~n - 1);< 3163#fibo1ENTRY ~n := #in~n; 3166#L10 assume !(~n < 1); 3165#L12 assume !(1 == ~n); 3094#L15 call #t~ret7 := fibo2(~n - 1);< 3149#fibo2ENTRY ~n := #in~n; 3180#L20 assume !(~n < 1); 3178#L22 assume !(1 == ~n); 3136#L25 call #t~ret9 := fibo1(~n - 1);< 3163#fibo1ENTRY ~n := #in~n; 3168#L10 assume !(~n < 1); 3186#L12 assume 1 == ~n;#res := 1; 3187#fibo1FINAL assume true; 3247#fibo1EXIT >#48#return; 3245#L25-1 call #t~ret10 := fibo1(~n - 2);< 3246#fibo1ENTRY ~n := #in~n; 3249#L10 assume ~n < 1;#res := 0; 3248#fibo1FINAL assume true; 3244#fibo1EXIT >#50#return; 3243#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret9;havoc #t~ret10; 3242#fibo2FINAL assume true; 3226#fibo2EXIT >#52#return; 3113#L15-1 [2020-10-20 08:00:55,583 INFO L796 eck$LassoCheckResult]: Loop: 3113#L15-1 call #t~ret8 := fibo2(~n - 2);< 3129#fibo2ENTRY ~n := #in~n; 3138#L20 assume !(~n < 1); 3140#L22 assume !(1 == ~n); 3109#L25 call #t~ret9 := fibo1(~n - 1);< 3114#fibo1ENTRY ~n := #in~n; 3196#L10 assume !(~n < 1); 3194#L12 assume !(1 == ~n); 3111#L15 call #t~ret7 := fibo2(~n - 1);< 3129#fibo2ENTRY ~n := #in~n; 3138#L20 assume !(~n < 1); 3140#L22 assume !(1 == ~n); 3109#L25 call #t~ret9 := fibo1(~n - 1);< 3114#fibo1ENTRY ~n := #in~n; 3196#L10 assume !(~n < 1); 3194#L12 assume !(1 == ~n); 3111#L15 call #t~ret7 := fibo2(~n - 1);< 3129#fibo2ENTRY ~n := #in~n; 3138#L20 assume !(~n < 1); 3140#L22 assume 1 == ~n;#res := 1; 3218#fibo2FINAL assume true; 3231#fibo2EXIT >#52#return; 3113#L15-1 call #t~ret8 := fibo2(~n - 2);< 3129#fibo2ENTRY ~n := #in~n; 3138#L20 assume ~n < 1;#res := 0; 3139#fibo2FINAL assume true; 3227#fibo2EXIT >#54#return; 3225#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 3224#fibo1FINAL assume true; 3220#fibo1EXIT >#48#return; 3127#L25-1 call #t~ret10 := fibo1(~n - 2);< 3114#fibo1ENTRY ~n := #in~n; 3196#L10 assume !(~n < 1); 3194#L12 assume !(1 == ~n); 3111#L15 call #t~ret7 := fibo2(~n - 1);< 3129#fibo2ENTRY ~n := #in~n; 3138#L20 assume !(~n < 1); 3140#L22 assume 1 == ~n;#res := 1; 3218#fibo2FINAL assume true; 3231#fibo2EXIT >#52#return; 3113#L15-1 call #t~ret8 := fibo2(~n - 2);< 3129#fibo2ENTRY ~n := #in~n; 3138#L20 assume ~n < 1;#res := 0; 3139#fibo2FINAL assume true; 3227#fibo2EXIT >#54#return; 3225#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 3224#fibo1FINAL assume true; 3220#fibo1EXIT >#50#return; 3221#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret9;havoc #t~ret10; 3229#fibo2FINAL assume true; 3228#fibo2EXIT >#52#return; 3113#L15-1 [2020-10-20 08:00:55,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:55,583 INFO L82 PathProgramCache]: Analyzing trace with hash 1100171425, now seen corresponding path program 2 times [2020-10-20 08:00:55,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:00:55,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311084998] [2020-10-20 08:00:55,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:00:55,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:55,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-20 08:00:55,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:55,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 08:00:55,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:55,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-20 08:00:55,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:55,757 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 16 proven. 23 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-20 08:00:55,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311084998] [2020-10-20 08:00:55,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377128643] [2020-10-20 08:00:55,758 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 08:00:55,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-20 08:00:55,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 08:00:55,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-20 08:00:55,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:55,860 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 16 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-20 08:00:55,861 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 08:00:55,861 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 18 [2020-10-20 08:00:55,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638591262] [2020-10-20 08:00:55,861 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-20 08:00:55,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:55,862 INFO L82 PathProgramCache]: Analyzing trace with hash -1108085027, now seen corresponding path program 2 times [2020-10-20 08:00:55,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:00:55,862 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927660106] [2020-10-20 08:00:55,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:00:55,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:55,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-20 08:00:55,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:55,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 08:00:55,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:55,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 08:00:55,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:55,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-20 08:00:55,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:55,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-20 08:00:55,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:55,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 08:00:55,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:55,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-20 08:00:55,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:55,966 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2020-10-20 08:00:55,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927660106] [2020-10-20 08:00:55,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76589180] [2020-10-20 08:00:55,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 08:00:55,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-20 08:00:55,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 08:00:55,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-20 08:00:56,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:56,093 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 27 proven. 20 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-20 08:00:56,094 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 08:00:56,094 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 14 [2020-10-20 08:00:56,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401297680] [2020-10-20 08:00:56,095 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-10-20 08:00:56,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 08:00:56,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-20 08:00:56,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2020-10-20 08:00:56,096 INFO L87 Difference]: Start difference. First operand 194 states and 251 transitions. cyclomatic complexity: 62 Second operand 19 states. [2020-10-20 08:00:56,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 08:00:56,687 INFO L93 Difference]: Finished difference Result 246 states and 296 transitions. [2020-10-20 08:00:56,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-20 08:00:56,688 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 246 states and 296 transitions. [2020-10-20 08:00:56,692 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 24 [2020-10-20 08:00:56,694 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 246 states to 163 states and 194 transitions. [2020-10-20 08:00:56,694 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 114 [2020-10-20 08:00:56,695 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 114 [2020-10-20 08:00:56,695 INFO L73 IsDeterministic]: Start isDeterministic. Operand 163 states and 194 transitions. [2020-10-20 08:00:56,696 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 08:00:56,696 INFO L691 BuchiCegarLoop]: Abstraction has 163 states and 194 transitions. [2020-10-20 08:00:56,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states and 194 transitions. [2020-10-20 08:00:56,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 157. [2020-10-20 08:00:56,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-20 08:00:56,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 188 transitions. [2020-10-20 08:00:56,703 INFO L714 BuchiCegarLoop]: Abstraction has 157 states and 188 transitions. [2020-10-20 08:00:56,703 INFO L594 BuchiCegarLoop]: Abstraction has 157 states and 188 transitions. [2020-10-20 08:00:56,703 INFO L427 BuchiCegarLoop]: ======== Iteration 7============ [2020-10-20 08:00:56,703 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 157 states and 188 transitions. [2020-10-20 08:00:56,705 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 22 [2020-10-20 08:00:56,705 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 08:00:56,705 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 08:00:56,706 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 08:00:56,706 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 08:00:56,706 INFO L794 eck$LassoCheckResult]: Stem: 4014#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(18);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 4010#L-1 havoc main_#res;havoc main_#t~ret11, main_~x~0, main_~result~0;main_~x~0 := 6; 3996#L39 call main_#t~ret11 := fibo1(main_~x~0);< 3997#fibo1ENTRY ~n := #in~n; 4046#L10 assume !(~n < 1); 4007#L12 assume !(1 == ~n); 3990#L15 call #t~ret7 := fibo2(~n - 1);< 4012#fibo2ENTRY ~n := #in~n; 4016#L20 assume !(~n < 1); 3989#L22 assume !(1 == ~n); 3975#L25 call #t~ret9 := fibo1(~n - 1);< 4005#fibo1ENTRY ~n := #in~n; 3974#L10 assume !(~n < 1); 3976#L12 assume !(1 == ~n); 4021#L15 call #t~ret7 := fibo2(~n - 1);< 4032#fibo2ENTRY ~n := #in~n; 4038#L20 assume !(~n < 1); 4034#L22 assume !(1 == ~n); 4018#L25 call #t~ret9 := fibo1(~n - 1);< 4041#fibo1ENTRY ~n := #in~n; 4042#L10 assume !(~n < 1); 4062#L12 assume !(1 == ~n); 4058#L15 call #t~ret7 := fibo2(~n - 1);< 4059#fibo2ENTRY ~n := #in~n; 4064#L20 assume !(~n < 1); 4063#L22 assume 1 == ~n;#res := 1; 4061#fibo2FINAL assume true; 4057#fibo2EXIT >#52#return; 4054#L15-1 call #t~ret8 := fibo2(~n - 2);< 4055#fibo2ENTRY ~n := #in~n; 4060#L20 assume ~n < 1;#res := 0; 4056#fibo2FINAL assume true; 4053#fibo2EXIT >#54#return; 4052#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 4048#fibo1FINAL assume true; 4045#fibo1EXIT >#48#return; 3971#L25-1 call #t~ret10 := fibo1(~n - 2);< 4043#fibo1ENTRY ~n := #in~n; 3970#L10 assume ~n < 1;#res := 0; 3972#fibo1FINAL assume true; 4006#fibo1EXIT >#50#return; 4071#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret9;havoc #t~ret10; 4119#fibo2FINAL assume true; 4110#fibo2EXIT >#52#return; 3966#L15-1 call #t~ret8 := fibo2(~n - 2);< 4083#fibo2ENTRY [2020-10-20 08:00:56,706 INFO L796 eck$LassoCheckResult]: Loop: 4083#fibo2ENTRY ~n := #in~n; 4084#L20 assume !(~n < 1); 4077#L22 assume !(1 == ~n); 4070#L25 call #t~ret9 := fibo1(~n - 1);< 4075#fibo1ENTRY ~n := #in~n; 4103#L10 assume !(~n < 1); 4101#L12 assume !(1 == ~n); 3965#L15 call #t~ret7 := fibo2(~n - 1);< 4083#fibo2ENTRY [2020-10-20 08:00:56,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:56,706 INFO L82 PathProgramCache]: Analyzing trace with hash 1560322136, now seen corresponding path program 1 times [2020-10-20 08:00:56,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:00:56,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853896666] [2020-10-20 08:00:56,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:00:56,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:56,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-20 08:00:56,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:56,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 08:00:56,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:56,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 08:00:56,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:56,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-20 08:00:56,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:56,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-20 08:00:56,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:56,877 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 5 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-20 08:00:56,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853896666] [2020-10-20 08:00:56,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222146842] [2020-10-20 08:00:56,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 08:00:56,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:56,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-20 08:00:56,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:57,043 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-20 08:00:57,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 08:00:57,044 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 17 [2020-10-20 08:00:57,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962697544] [2020-10-20 08:00:57,044 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-20 08:00:57,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:57,045 INFO L82 PathProgramCache]: Analyzing trace with hash 996300776, now seen corresponding path program 2 times [2020-10-20 08:00:57,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:00:57,046 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809778371] [2020-10-20 08:00:57,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:00:57,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:00:57,052 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:00:57,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:00:57,054 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:00:57,055 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 08:00:57,162 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 08:00:57,162 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 08:00:57,163 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 08:00:57,163 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 08:00:57,163 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-20 08:00:57,163 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:57,163 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 08:00:57,163 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 08:00:57,163 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_6-2.c_Iteration7_Loop [2020-10-20 08:00:57,163 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 08:00:57,163 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 08:00:57,165 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:57,176 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:57,178 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:57,180 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:57,183 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:57,185 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:57,202 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:57,210 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:57,213 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:57,216 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:57,269 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 08:00:57,269 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:00:57,291 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:00:57,291 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 41 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:00:57,334 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-20 08:00:57,335 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 42 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:57,435 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-20 08:00:57,437 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 08:00:57,437 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 08:00:57,437 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 08:00:57,437 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 08:00:57,437 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-20 08:00:57,437 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:57,437 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 08:00:57,438 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 08:00:57,438 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_6-2.c_Iteration7_Loop [2020-10-20 08:00:57,438 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 08:00:57,438 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 08:00:57,440 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:57,442 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:57,444 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:57,451 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:57,455 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:57,458 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:57,460 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:57,462 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:57,465 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:57,467 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:57,516 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 08:00:57,516 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:00:57,532 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 08:00:57,535 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:00:57,535 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:00:57,535 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:00:57,535 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:00:57,535 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:00:57,536 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:00:57,536 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 43 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:57,539 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:00:57,583 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 08:00:57,585 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:00:57,585 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:00:57,585 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:00:57,586 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:00:57,586 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:00:57,587 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:00:57,587 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 44 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:57,589 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:00:57,625 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 08:00:57,627 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:00:57,627 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:00:57,627 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:00:57,627 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:00:57,627 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:00:57,628 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:00:57,629 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 45 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:57,631 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-20 08:00:57,635 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2020-10-20 08:00:57,635 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:00:57,639 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-20 08:00:57,640 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-20 08:00:57,640 INFO L510 LassoAnalysis]: Proved termination. [2020-10-20 08:00:57,640 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo2_#in~n) = 1*fibo2_#in~n Supporting invariants [] Waiting until toolchain timeout for monitored process 46 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:57,668 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-20 08:00:57,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:57,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:57,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-20 08:00:57,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:57,765 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:00:57,770 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:00:57,773 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:00:57,776 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:00:57,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:57,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-20 08:00:57,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:57,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 08:00:57,872 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 [2020-10-20 08:00:57,872 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 157 states and 188 transitions. cyclomatic complexity: 35 Second operand 7 states. [2020-10-20 08:00:58,015 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 157 states and 188 transitions. cyclomatic complexity: 35. Second operand 7 states. Result 225 states and 264 transitions. Complement of second has 16 states. [2020-10-20 08:00:58,016 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 [2020-10-20 08:00:58,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-20 08:00:58,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 26 transitions. [2020-10-20 08:00:58,018 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 26 transitions. Stem has 45 letters. Loop has 8 letters. [2020-10-20 08:00:58,018 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:00:58,018 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-20 08:00:58,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:58,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:58,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-20 08:00:58,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:58,103 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:00:58,106 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:00:58,109 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:00:58,112 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:00:58,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:58,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-20 08:00:58,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:58,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 08:00:58,170 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 [2020-10-20 08:00:58,170 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 157 states and 188 transitions. cyclomatic complexity: 35 Second operand 7 states. [2020-10-20 08:00:58,322 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 157 states and 188 transitions. cyclomatic complexity: 35. Second operand 7 states. Result 225 states and 264 transitions. Complement of second has 16 states. [2020-10-20 08:00:58,323 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 [2020-10-20 08:00:58,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-20 08:00:58,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 26 transitions. [2020-10-20 08:00:58,324 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 26 transitions. Stem has 45 letters. Loop has 8 letters. [2020-10-20 08:00:58,325 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:00:58,325 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-20 08:00:58,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:58,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:58,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-20 08:00:58,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:58,409 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:00:58,413 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:00:58,416 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:00:58,419 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:00:58,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:58,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-20 08:00:58,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:58,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 08:00:58,475 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 [2020-10-20 08:00:58,475 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 157 states and 188 transitions. cyclomatic complexity: 35 Second operand 7 states. [2020-10-20 08:00:58,663 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 157 states and 188 transitions. cyclomatic complexity: 35. Second operand 7 states. Result 314 states and 366 transitions. Complement of second has 23 states. [2020-10-20 08:00:58,664 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 [2020-10-20 08:00:58,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-20 08:00:58,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 43 transitions. [2020-10-20 08:00:58,666 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 43 transitions. Stem has 45 letters. Loop has 8 letters. [2020-10-20 08:00:58,666 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:00:58,667 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 43 transitions. Stem has 53 letters. Loop has 8 letters. [2020-10-20 08:00:58,670 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:00:58,671 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 43 transitions. Stem has 45 letters. Loop has 16 letters. [2020-10-20 08:00:58,671 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:00:58,673 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 314 states and 366 transitions. [2020-10-20 08:00:58,677 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 46 [2020-10-20 08:00:58,682 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 314 states to 234 states and 279 transitions. [2020-10-20 08:00:58,682 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 132 [2020-10-20 08:00:58,683 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 141 [2020-10-20 08:00:58,683 INFO L73 IsDeterministic]: Start isDeterministic. Operand 234 states and 279 transitions. [2020-10-20 08:00:58,683 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 08:00:58,683 INFO L691 BuchiCegarLoop]: Abstraction has 234 states and 279 transitions. [2020-10-20 08:00:58,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states and 279 transitions. [2020-10-20 08:00:58,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 215. [2020-10-20 08:00:58,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2020-10-20 08:00:58,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 255 transitions. [2020-10-20 08:00:58,702 INFO L714 BuchiCegarLoop]: Abstraction has 215 states and 255 transitions. [2020-10-20 08:00:58,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 08:00:58,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-20 08:00:58,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2020-10-20 08:00:58,703 INFO L87 Difference]: Start difference. First operand 215 states and 255 transitions. Second operand 17 states. [2020-10-20 08:00:59,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 08:00:59,113 INFO L93 Difference]: Finished difference Result 220 states and 258 transitions. [2020-10-20 08:00:59,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-20 08:00:59,114 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 220 states and 258 transitions. [2020-10-20 08:00:59,118 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 40 [2020-10-20 08:00:59,121 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 220 states to 218 states and 256 transitions. [2020-10-20 08:00:59,122 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 134 [2020-10-20 08:00:59,122 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 134 [2020-10-20 08:00:59,123 INFO L73 IsDeterministic]: Start isDeterministic. Operand 218 states and 256 transitions. [2020-10-20 08:00:59,123 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 08:00:59,123 INFO L691 BuchiCegarLoop]: Abstraction has 218 states and 256 transitions. [2020-10-20 08:00:59,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states and 256 transitions. [2020-10-20 08:00:59,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 210. [2020-10-20 08:00:59,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2020-10-20 08:00:59,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 248 transitions. [2020-10-20 08:00:59,131 INFO L714 BuchiCegarLoop]: Abstraction has 210 states and 248 transitions. [2020-10-20 08:00:59,131 INFO L594 BuchiCegarLoop]: Abstraction has 210 states and 248 transitions. [2020-10-20 08:00:59,131 INFO L427 BuchiCegarLoop]: ======== Iteration 8============ [2020-10-20 08:00:59,131 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 210 states and 248 transitions. [2020-10-20 08:00:59,133 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 40 [2020-10-20 08:00:59,133 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 08:00:59,133 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 08:00:59,135 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 08:00:59,135 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 08:00:59,135 INFO L794 eck$LassoCheckResult]: Stem: 6182#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(18);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 6181#L-1 havoc main_#res;havoc main_#t~ret11, main_~x~0, main_~result~0;main_~x~0 := 6; 6152#L39 call main_#t~ret11 := fibo1(main_~x~0);< 6153#fibo1ENTRY ~n := #in~n; 6262#L10 assume !(~n < 1); 6261#L12 assume !(1 == ~n); 6257#L15 call #t~ret7 := fibo2(~n - 1);< 6260#fibo2ENTRY ~n := #in~n; 6259#L20 assume !(~n < 1); 6258#L22 assume !(1 == ~n); 6250#L25 call #t~ret9 := fibo1(~n - 1);< 6256#fibo1ENTRY ~n := #in~n; 6254#L10 assume !(~n < 1); 6252#L12 assume !(1 == ~n); 6129#L15 call #t~ret7 := fibo2(~n - 1);< 6209#fibo2ENTRY ~n := #in~n; 6248#L20 assume !(~n < 1); 6243#L22 assume !(1 == ~n); 6196#L25 call #t~ret9 := fibo1(~n - 1);< 6220#fibo1ENTRY ~n := #in~n; 6236#L10 assume !(~n < 1); 6235#L12 assume !(1 == ~n); 6232#L15 call #t~ret7 := fibo2(~n - 1);< 6233#fibo2ENTRY ~n := #in~n; 6240#L20 assume !(~n < 1); 6239#L22 assume 1 == ~n;#res := 1; 6238#fibo2FINAL assume true; 6231#fibo2EXIT >#52#return; 6228#L15-1 call #t~ret8 := fibo2(~n - 2);< 6229#fibo2ENTRY ~n := #in~n; 6234#L20 assume ~n < 1;#res := 0; 6230#fibo2FINAL assume true; 6227#fibo2EXIT >#54#return; 6226#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 6225#fibo1FINAL assume true; 6219#fibo1EXIT >#48#return; 6211#L25-1 call #t~ret10 := fibo1(~n - 2);< 6180#fibo1ENTRY ~n := #in~n; 6215#L10 assume !(~n < 1); 6213#L12 assume !(1 == ~n); 6166#L15 call #t~ret7 := fibo2(~n - 1);< 6210#fibo2ENTRY ~n := #in~n; 6207#L20 assume !(~n < 1); 6203#L22 assume 1 == ~n;#res := 1; 6204#fibo2FINAL assume true; 6291#fibo2EXIT >#52#return; 6141#L15-1 [2020-10-20 08:00:59,135 INFO L796 eck$LassoCheckResult]: Loop: 6141#L15-1 call #t~ret8 := fibo2(~n - 2);< 6284#fibo2ENTRY ~n := #in~n; 6286#L20 assume !(~n < 1); 6279#L22 assume !(1 == ~n); 6138#L25 call #t~ret9 := fibo1(~n - 1);< 6184#fibo1ENTRY ~n := #in~n; 6137#L10 assume !(~n < 1); 6139#L12 assume !(1 == ~n); 6270#L15 call #t~ret7 := fibo2(~n - 1);< 6186#fibo2ENTRY ~n := #in~n; 6293#L20 assume !(~n < 1); 6302#L22 assume 1 == ~n;#res := 1; 6301#fibo2FINAL assume true; 6290#fibo2EXIT >#52#return; 6141#L15-1 [2020-10-20 08:00:59,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:59,136 INFO L82 PathProgramCache]: Analyzing trace with hash -663651953, now seen corresponding path program 1 times [2020-10-20 08:00:59,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:00:59,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358301408] [2020-10-20 08:00:59,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:00:59,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:59,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-20 08:00:59,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:59,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 08:00:59,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:59,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-20 08:00:59,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:59,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-20 08:00:59,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:59,274 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 20 proven. 24 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-10-20 08:00:59,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358301408] [2020-10-20 08:00:59,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424370290] [2020-10-20 08:00:59,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 08:00:59,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:59,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-20 08:00:59,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:59,402 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 27 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-20 08:00:59,402 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 08:00:59,402 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2020-10-20 08:00:59,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055701228] [2020-10-20 08:00:59,403 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-20 08:00:59,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:59,403 INFO L82 PathProgramCache]: Analyzing trace with hash -815837104, now seen corresponding path program 1 times [2020-10-20 08:00:59,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:00:59,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527310999] [2020-10-20 08:00:59,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:00:59,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:00:59,407 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:00:59,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:00:59,409 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:00:59,411 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 08:00:59,593 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 08:00:59,593 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 08:00:59,593 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 08:00:59,594 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 08:00:59,594 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-20 08:00:59,594 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:59,594 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 08:00:59,594 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 08:00:59,594 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_6-2.c_Iteration8_Loop [2020-10-20 08:00:59,594 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 08:00:59,595 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 08:00:59,596 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:59,600 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:59,602 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:59,603 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:59,607 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:59,608 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:59,615 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:59,621 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:59,624 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:59,684 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 08:00:59,684 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:59,688 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:00:59,688 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:00:59,693 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:00:59,693 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#t~ret8=0} Honda state: {fibo1_#t~ret8=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:00:59,714 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:00:59,714 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 49 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:59,717 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:00:59,717 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#res=0} Honda state: {fibo2_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:00:59,737 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:00:59,738 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 50 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:59,740 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:00:59,741 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_~n=0} Honda state: {fibo2_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:59,762 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:00:59,762 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:00:59,764 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:00:59,764 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#res=0} Honda state: {fibo1_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:59,789 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:00:59,789 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:00:59,792 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:00:59,792 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#t~ret10=0} Honda state: {fibo2_#t~ret10=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:00:59,814 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:00:59,814 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 53 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:59,816 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:00:59,817 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#t~ret9=0} Honda state: {fibo2_#t~ret9=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:59,842 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:00:59,842 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:00:59,870 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-20 08:00:59,870 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 55 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:00,764 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-20 08:01:00,766 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 08:01:00,766 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 08:01:00,766 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 08:01:00,766 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 08:01:00,766 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-20 08:01:00,766 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:00,766 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 08:01:00,767 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 08:01:00,767 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_6-2.c_Iteration8_Loop [2020-10-20 08:01:00,767 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 08:01:00,767 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 08:01:00,768 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:00,770 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:00,773 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:00,774 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:00,776 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:00,777 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:00,779 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:00,781 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:00,788 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:00,841 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 08:01:00,841 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:00,846 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 08:01:00,848 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:00,848 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:00,849 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:00,849 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:00,849 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:00,849 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:00,849 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:00,851 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:00,872 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 08:01:00,873 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:00,873 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:00,874 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:00,874 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:00,874 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:00,874 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:00,874 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:00,876 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:00,900 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 08:01:00,901 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:00,901 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:00,901 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:00,902 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:00,902 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:00,902 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:00,902 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:00,904 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:00,927 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 08:01:00,929 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:00,929 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:00,929 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:00,930 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:00,930 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:00,931 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:00,931 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:00,932 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:01:00,956 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false Waiting until toolchain timeout for monitored process 60 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:00,957 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:00,957 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:00,958 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:00,958 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:00,958 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:00,958 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:00,958 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:00,959 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:00,982 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 08:01:00,983 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:00,983 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:00,984 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:00,984 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:00,984 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:00,984 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:00,985 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:00,986 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:01,008 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 08:01:01,010 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:01,010 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:01,010 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:01,010 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:01,010 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:01,011 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:01,011 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:01,012 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:01,035 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 08:01:01,036 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:01,036 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:01,036 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:01,036 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:01,036 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:01,037 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:01,037 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:01,040 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-20 08:01:01,044 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-20 08:01:01,044 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:01,058 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-20 08:01:01,058 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-20 08:01:01,058 INFO L510 LassoAnalysis]: Proved termination. [2020-10-20 08:01:01,058 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo1_~n) = 1*fibo1_~n Supporting invariants [] [2020-10-20 08:01:01,078 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-20 08:01:01,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:01,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:01,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-20 08:01:01,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:01,169 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:01,172 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:01,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:01,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-20 08:01:01,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:01,282 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 08:01:01,283 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 [2020-10-20 08:01:01,283 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 210 states and 248 transitions. cyclomatic complexity: 43 Second operand 10 states. [2020-10-20 08:01:01,705 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 210 states and 248 transitions. cyclomatic complexity: 43. Second operand 10 states. Result 608 states and 688 transitions. Complement of second has 40 states. [2020-10-20 08:01:01,706 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 [2020-10-20 08:01:01,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-10-20 08:01:01,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 54 transitions. [2020-10-20 08:01:01,707 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 54 transitions. Stem has 46 letters. Loop has 14 letters. [2020-10-20 08:01:01,708 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:01,708 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-20 08:01:01,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:01,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:01,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-20 08:01:01,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:01,799 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:01,802 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:01,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:01,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-20 08:01:01,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:01,951 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 08:01:01,952 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 [2020-10-20 08:01:01,952 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 210 states and 248 transitions. cyclomatic complexity: 43 Second operand 10 states. [2020-10-20 08:01:02,206 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 210 states and 248 transitions. cyclomatic complexity: 43. Second operand 10 states. Result 260 states and 302 transitions. Complement of second has 26 states. [2020-10-20 08:01:02,207 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 [2020-10-20 08:01:02,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-10-20 08:01:02,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 31 transitions. [2020-10-20 08:01:02,208 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 31 transitions. Stem has 46 letters. Loop has 14 letters. [2020-10-20 08:01:02,209 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:02,209 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-20 08:01:02,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:02,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:02,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-20 08:01:02,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:02,289 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:02,292 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:02,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:02,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-20 08:01:02,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:02,394 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 08:01:02,395 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 [2020-10-20 08:01:02,395 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 210 states and 248 transitions. cyclomatic complexity: 43 Second operand 10 states. [2020-10-20 08:01:02,853 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 210 states and 248 transitions. cyclomatic complexity: 43. Second operand 10 states. Result 1187 states and 1346 transitions. Complement of second has 102 states. [2020-10-20 08:01:02,857 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 [2020-10-20 08:01:02,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-10-20 08:01:02,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 71 transitions. [2020-10-20 08:01:02,859 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 71 transitions. Stem has 46 letters. Loop has 14 letters. [2020-10-20 08:01:02,862 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:02,862 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 71 transitions. Stem has 60 letters. Loop has 14 letters. [2020-10-20 08:01:02,863 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:02,864 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 71 transitions. Stem has 46 letters. Loop has 28 letters. [2020-10-20 08:01:02,865 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:02,866 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1187 states and 1346 transitions. [2020-10-20 08:01:02,880 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 124 [2020-10-20 08:01:02,889 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1187 states to 613 states and 697 transitions. [2020-10-20 08:01:02,889 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 287 [2020-10-20 08:01:02,890 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 313 [2020-10-20 08:01:02,890 INFO L73 IsDeterministic]: Start isDeterministic. Operand 613 states and 697 transitions. [2020-10-20 08:01:02,891 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 08:01:02,891 INFO L691 BuchiCegarLoop]: Abstraction has 613 states and 697 transitions. [2020-10-20 08:01:02,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states and 697 transitions. [2020-10-20 08:01:02,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 547. [2020-10-20 08:01:02,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 547 states. [2020-10-20 08:01:02,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 618 transitions. [2020-10-20 08:01:02,909 INFO L714 BuchiCegarLoop]: Abstraction has 547 states and 618 transitions. [2020-10-20 08:01:02,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 08:01:02,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-20 08:01:02,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2020-10-20 08:01:02,911 INFO L87 Difference]: Start difference. First operand 547 states and 618 transitions. Second operand 16 states. [2020-10-20 08:01:03,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 08:01:03,231 INFO L93 Difference]: Finished difference Result 373 states and 416 transitions. [2020-10-20 08:01:03,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-20 08:01:03,232 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 373 states and 416 transitions. [2020-10-20 08:01:03,236 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 28 [2020-10-20 08:01:03,239 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 373 states to 258 states and 292 transitions. [2020-10-20 08:01:03,239 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 149 [2020-10-20 08:01:03,240 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 165 [2020-10-20 08:01:03,240 INFO L73 IsDeterministic]: Start isDeterministic. Operand 258 states and 292 transitions. [2020-10-20 08:01:03,240 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 08:01:03,240 INFO L691 BuchiCegarLoop]: Abstraction has 258 states and 292 transitions. [2020-10-20 08:01:03,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states and 292 transitions. [2020-10-20 08:01:03,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 255. [2020-10-20 08:01:03,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255 states. [2020-10-20 08:01:03,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 286 transitions. [2020-10-20 08:01:03,248 INFO L714 BuchiCegarLoop]: Abstraction has 255 states and 286 transitions. [2020-10-20 08:01:03,248 INFO L594 BuchiCegarLoop]: Abstraction has 255 states and 286 transitions. [2020-10-20 08:01:03,248 INFO L427 BuchiCegarLoop]: ======== Iteration 9============ [2020-10-20 08:01:03,249 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 255 states and 286 transitions. [2020-10-20 08:01:03,250 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 28 [2020-10-20 08:01:03,251 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 08:01:03,251 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 08:01:03,252 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 08:01:03,252 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 08:01:03,253 INFO L794 eck$LassoCheckResult]: Stem: 10359#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(18);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 10358#L-1 havoc main_#res;havoc main_#t~ret11, main_~x~0, main_~result~0;main_~x~0 := 6; 10333#L39 call main_#t~ret11 := fibo1(main_~x~0);< 10334#fibo1ENTRY ~n := #in~n; 10462#L10 assume !(~n < 1); 10461#L12 assume !(1 == ~n); 10443#L15 call #t~ret7 := fibo2(~n - 1);< 10460#fibo2ENTRY ~n := #in~n; 10459#L20 assume !(~n < 1); 10458#L22 assume !(1 == ~n); 10454#L25 call #t~ret9 := fibo1(~n - 1);< 10457#fibo1ENTRY ~n := #in~n; 10456#L10 assume !(~n < 1); 10455#L12 assume !(1 == ~n); 10450#L15 call #t~ret7 := fibo2(~n - 1);< 10453#fibo2ENTRY ~n := #in~n; 10452#L20 assume !(~n < 1); 10451#L22 assume !(1 == ~n); 10362#L25 call #t~ret9 := fibo1(~n - 1);< 10449#fibo1ENTRY ~n := #in~n; 10448#L10 assume !(~n < 1); 10447#L12 assume !(1 == ~n); 10361#L15 call #t~ret7 := fibo2(~n - 1);< 10363#fibo2ENTRY ~n := #in~n; 10470#L20 assume !(~n < 1); 10469#L22 assume 1 == ~n;#res := 1; 10465#fibo2FINAL assume true; 10463#fibo2EXIT >#52#return; 10464#L15-1 call #t~ret8 := fibo2(~n - 2);< 10497#fibo2ENTRY ~n := #in~n; 10514#L20 assume ~n < 1;#res := 0; 10513#fibo2FINAL assume true; 10496#fibo2EXIT >#54#return; 10495#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 10493#fibo1FINAL assume true; 10490#fibo1EXIT >#48#return; 10486#L25-1 call #t~ret10 := fibo1(~n - 2);< 10487#fibo1ENTRY ~n := #in~n; 10494#L10 assume !(~n < 1); 10492#L12 assume 1 == ~n;#res := 1; 10489#fibo1FINAL assume true; 10485#fibo1EXIT >#50#return; 10483#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret9;havoc #t~ret10; 10482#fibo2FINAL assume true; 10481#fibo2EXIT >#52#return; 10419#L15-1 call #t~ret8 := fibo2(~n - 2);< 10477#fibo2ENTRY ~n := #in~n; 10519#L20 assume ~n < 1;#res := 0; 10520#fibo2FINAL assume true; 10547#fibo2EXIT >#54#return; 10476#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 10478#fibo1FINAL assume true; 10472#fibo1EXIT >#48#return; 10445#L25-1 call #t~ret10 := fibo1(~n - 2);< 10350#fibo1ENTRY ~n := #in~n; 10506#L10 assume !(~n < 1); 10504#L12 assume !(1 == ~n); 10444#L15 call #t~ret7 := fibo2(~n - 1);< 10446#fibo2ENTRY [2020-10-20 08:01:03,253 INFO L796 eck$LassoCheckResult]: Loop: 10446#fibo2ENTRY ~n := #in~n; 10510#L20 assume !(~n < 1); 10508#L22 assume !(1 == ~n); 10336#L25 call #t~ret9 := fibo1(~n - 1);< 10507#fibo1ENTRY ~n := #in~n; 10505#L10 assume !(~n < 1); 10502#L12 assume !(1 == ~n); 10475#L15 call #t~ret7 := fibo2(~n - 1);< 10446#fibo2ENTRY [2020-10-20 08:01:03,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:03,253 INFO L82 PathProgramCache]: Analyzing trace with hash -246198455, now seen corresponding path program 2 times [2020-10-20 08:01:03,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:01:03,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008303583] [2020-10-20 08:01:03,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:01:03,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:03,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-20 08:01:03,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:03,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 08:01:03,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:03,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 08:01:03,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:03,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 08:01:03,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:03,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-20 08:01:03,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:03,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-20 08:01:03,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:03,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-20 08:01:03,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:03,398 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 32 proven. 27 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-20 08:01:03,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008303583] [2020-10-20 08:01:03,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5285221] [2020-10-20 08:01:03,399 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 08:01:03,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-20 08:01:03,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 08:01:03,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-20 08:01:03,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:03,511 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 31 proven. 27 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-10-20 08:01:03,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 08:01:03,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 15 [2020-10-20 08:01:03,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960905673] [2020-10-20 08:01:03,512 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-20 08:01:03,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:03,512 INFO L82 PathProgramCache]: Analyzing trace with hash 996300776, now seen corresponding path program 3 times [2020-10-20 08:01:03,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:01:03,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774567845] [2020-10-20 08:01:03,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:01:03,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:01:03,517 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:01:03,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:01:03,518 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:01:03,521 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 08:01:03,616 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 08:01:03,616 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 08:01:03,616 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 08:01:03,616 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 08:01:03,617 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-20 08:01:03,617 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:03,617 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 08:01:03,617 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 08:01:03,617 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_6-2.c_Iteration9_Loop [2020-10-20 08:01:03,617 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 08:01:03,617 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 08:01:03,618 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:03,624 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:03,626 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:03,629 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:03,632 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:03,635 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:03,643 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:03,645 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:03,648 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:03,651 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:03,706 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 08:01:03,706 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:03,710 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:01:03,710 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:01:03,712 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:01:03,712 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#t~ret7=0} Honda state: {fibo1_#t~ret7=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:03,734 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:01:03,734 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:01:03,736 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:01:03,736 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_~n=0} Honda state: {fibo1_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:03,758 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:01:03,758 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:01:03,761 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:01:03,761 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#res=0} Honda state: {fibo1_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:03,783 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:01:03,783 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:01:03,785 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:01:03,786 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#in~n=0} Honda state: {fibo1_#in~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:03,812 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:01:03,812 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:01:03,814 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:01:03,814 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#t~ret9=0} Honda state: {fibo2_#t~ret9=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:03,837 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:01:03,837 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:03,861 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-20 08:01:03,861 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:01:03,885 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-20 08:01:03,887 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 08:01:03,887 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 08:01:03,887 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 08:01:03,887 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 08:01:03,887 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-20 08:01:03,887 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:03,887 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 08:01:03,888 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 08:01:03,888 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_6-2.c_Iteration9_Loop [2020-10-20 08:01:03,888 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 08:01:03,888 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 08:01:03,889 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:03,894 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:03,896 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:03,898 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:03,900 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:03,902 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:03,905 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:03,906 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:03,914 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:03,916 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:03,976 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 08:01:03,977 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:03,980 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 08:01:03,981 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:03,982 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:03,982 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:03,982 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:03,982 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:03,982 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:03,983 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:03,984 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:04,005 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 08:01:04,007 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:04,007 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:04,007 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:04,007 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:04,007 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:04,008 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:04,008 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:04,009 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:04,032 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 08:01:04,033 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:04,033 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:04,034 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:04,034 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:04,034 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:04,034 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:04,034 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:04,036 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:04,060 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 08:01:04,061 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:04,062 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:04,062 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:04,062 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:04,062 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:04,062 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:04,062 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:04,063 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:04,087 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 08:01:04,088 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:04,088 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:04,088 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:04,088 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:04,088 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:04,089 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:04,089 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:04,100 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:04,124 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 08:01:04,125 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:04,126 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:04,126 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:04,126 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:04,126 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:04,126 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:04,126 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:04,128 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:04,156 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 08:01:04,158 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:04,158 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:04,158 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:04,158 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:04,158 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:04,158 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:04,159 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:04,160 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:01:04,195 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 08:01:04,197 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:04,197 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:04,198 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:04,198 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:04,198 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:04,199 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:04,199 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 80 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:04,201 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-20 08:01:04,204 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-20 08:01:04,204 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:04,207 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-20 08:01:04,207 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-20 08:01:04,208 INFO L510 LassoAnalysis]: Proved termination. [2020-10-20 08:01:04,208 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo2_#in~n) = 1*fibo2_#in~n Supporting invariants [] [2020-10-20 08:01:04,228 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-20 08:01:04,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:04,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:04,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-20 08:01:04,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:04,327 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:04,330 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:04,331 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:04,334 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:04,336 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:04,338 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:04,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:04,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-20 08:01:04,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:04,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 08:01:04,390 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 [2020-10-20 08:01:04,390 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 255 states and 286 transitions. cyclomatic complexity: 34 Second operand 7 states. [2020-10-20 08:01:04,507 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 255 states and 286 transitions. cyclomatic complexity: 34. Second operand 7 states. Result 273 states and 304 transitions. Complement of second has 15 states. [2020-10-20 08:01:04,511 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 [2020-10-20 08:01:04,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-20 08:01:04,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 17 transitions. [2020-10-20 08:01:04,512 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 17 transitions. Stem has 58 letters. Loop has 8 letters. [2020-10-20 08:01:04,513 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:04,513 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-20 08:01:04,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:04,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:04,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-20 08:01:04,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:04,673 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:04,677 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:04,679 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:04,685 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:04,687 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:04,691 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:04,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:04,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-20 08:01:04,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:04,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 08:01:04,760 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 [2020-10-20 08:01:04,760 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 255 states and 286 transitions. cyclomatic complexity: 34 Second operand 7 states. [2020-10-20 08:01:04,883 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 255 states and 286 transitions. cyclomatic complexity: 34. Second operand 7 states. Result 273 states and 304 transitions. Complement of second has 15 states. [2020-10-20 08:01:04,884 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 [2020-10-20 08:01:04,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-20 08:01:04,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 17 transitions. [2020-10-20 08:01:04,885 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 17 transitions. Stem has 58 letters. Loop has 8 letters. [2020-10-20 08:01:04,885 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:04,885 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-20 08:01:04,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:04,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:04,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-20 08:01:04,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:04,991 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:04,994 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:04,996 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:04,998 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:05,000 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:05,002 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:05,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:05,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-20 08:01:05,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:05,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 08:01:05,061 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 [2020-10-20 08:01:05,061 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 255 states and 286 transitions. cyclomatic complexity: 34 Second operand 7 states. [2020-10-20 08:01:05,268 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 255 states and 286 transitions. cyclomatic complexity: 34. Second operand 7 states. Result 393 states and 429 transitions. Complement of second has 25 states. [2020-10-20 08:01:05,273 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 [2020-10-20 08:01:05,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-20 08:01:05,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 42 transitions. [2020-10-20 08:01:05,275 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 42 transitions. Stem has 58 letters. Loop has 8 letters. [2020-10-20 08:01:05,275 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:05,276 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 42 transitions. Stem has 66 letters. Loop has 8 letters. [2020-10-20 08:01:05,276 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:05,276 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 42 transitions. Stem has 58 letters. Loop has 16 letters. [2020-10-20 08:01:05,277 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:05,277 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 393 states and 429 transitions. [2020-10-20 08:01:05,286 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 23 [2020-10-20 08:01:05,289 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 393 states to 277 states and 306 transitions. [2020-10-20 08:01:05,289 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 151 [2020-10-20 08:01:05,290 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 170 [2020-10-20 08:01:05,290 INFO L73 IsDeterministic]: Start isDeterministic. Operand 277 states and 306 transitions. [2020-10-20 08:01:05,290 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 08:01:05,290 INFO L691 BuchiCegarLoop]: Abstraction has 277 states and 306 transitions. [2020-10-20 08:01:05,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states and 306 transitions. [2020-10-20 08:01:05,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 263. [2020-10-20 08:01:05,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 263 states. [2020-10-20 08:01:05,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 292 transitions. [2020-10-20 08:01:05,302 INFO L714 BuchiCegarLoop]: Abstraction has 263 states and 292 transitions. [2020-10-20 08:01:05,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 08:01:05,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-20 08:01:05,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2020-10-20 08:01:05,304 INFO L87 Difference]: Start difference. First operand 263 states and 292 transitions. Second operand 15 states. [2020-10-20 08:01:05,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 08:01:05,643 INFO L93 Difference]: Finished difference Result 272 states and 304 transitions. [2020-10-20 08:01:05,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-20 08:01:05,644 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 272 states and 304 transitions. [2020-10-20 08:01:05,648 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 20 [2020-10-20 08:01:05,650 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 272 states to 269 states and 301 transitions. [2020-10-20 08:01:05,650 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 164 [2020-10-20 08:01:05,651 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 164 [2020-10-20 08:01:05,651 INFO L73 IsDeterministic]: Start isDeterministic. Operand 269 states and 301 transitions. [2020-10-20 08:01:05,651 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 08:01:05,651 INFO L691 BuchiCegarLoop]: Abstraction has 269 states and 301 transitions. [2020-10-20 08:01:05,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states and 301 transitions. [2020-10-20 08:01:05,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 264. [2020-10-20 08:01:05,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-10-20 08:01:05,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 292 transitions. [2020-10-20 08:01:05,658 INFO L714 BuchiCegarLoop]: Abstraction has 264 states and 292 transitions. [2020-10-20 08:01:05,658 INFO L594 BuchiCegarLoop]: Abstraction has 264 states and 292 transitions. [2020-10-20 08:01:05,659 INFO L427 BuchiCegarLoop]: ======== Iteration 10============ [2020-10-20 08:01:05,659 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 264 states and 292 transitions. [2020-10-20 08:01:05,661 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 20 [2020-10-20 08:01:05,661 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 08:01:05,661 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 08:01:05,662 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [6, 6, 6, 5, 5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 08:01:05,662 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 08:01:05,662 INFO L794 eck$LassoCheckResult]: Stem: 13105#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(18);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 13097#L-1 havoc main_#res;havoc main_#t~ret11, main_~x~0, main_~result~0;main_~x~0 := 6; 13071#L39 call main_#t~ret11 := fibo1(main_~x~0);< 13072#fibo1ENTRY ~n := #in~n; 13226#L10 assume !(~n < 1); 13224#L12 assume !(1 == ~n); 13216#L15 call #t~ret7 := fibo2(~n - 1);< 13219#fibo2ENTRY ~n := #in~n; 13218#L20 assume !(~n < 1); 13217#L22 assume !(1 == ~n); 13212#L25 call #t~ret9 := fibo1(~n - 1);< 13215#fibo1ENTRY ~n := #in~n; 13214#L10 assume !(~n < 1); 13213#L12 assume !(1 == ~n); 13041#L15 call #t~ret7 := fibo2(~n - 1);< 13207#fibo2ENTRY ~n := #in~n; 13202#L20 assume !(~n < 1); 13200#L22 assume !(1 == ~n); 13192#L25 call #t~ret9 := fibo1(~n - 1);< 13199#fibo1ENTRY ~n := #in~n; 13197#L10 assume !(~n < 1); 13195#L12 assume !(1 == ~n); 13189#L15 call #t~ret7 := fibo2(~n - 1);< 13193#fibo2ENTRY ~n := #in~n; 13198#L20 assume !(~n < 1); 13196#L22 assume 1 == ~n;#res := 1; 13194#fibo2FINAL assume true; 13188#fibo2EXIT >#52#return; 13190#L15-1 call #t~ret8 := fibo2(~n - 2);< 13278#fibo2ENTRY ~n := #in~n; 13280#L20 assume ~n < 1;#res := 0; 13279#fibo2FINAL assume true; 13277#fibo2EXIT >#54#return; 13275#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 13273#fibo1FINAL assume true; 13272#fibo1EXIT >#48#return; 13089#L25-1 call #t~ret10 := fibo1(~n - 2);< 13090#fibo1ENTRY ~n := #in~n; 13284#L10 assume !(~n < 1); 13283#L12 assume 1 == ~n;#res := 1; 13271#fibo1FINAL assume true; 13269#fibo1EXIT >#50#return; 13040#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret9;havoc #t~ret10; 13042#fibo2FINAL assume true; 13255#fibo2EXIT >#52#return; 13084#L15-1 call #t~ret8 := fibo2(~n - 2);< 13156#fibo2ENTRY ~n := #in~n; 13158#L20 assume !(~n < 1); 13152#L22 assume !(1 == ~n); 13144#L25 call #t~ret9 := fibo1(~n - 1);< 13151#fibo1ENTRY ~n := #in~n; 13150#L10 assume !(~n < 1); 13143#L12 assume !(1 == ~n); 13064#L15 call #t~ret7 := fibo2(~n - 1);< 13185#fibo2ENTRY ~n := #in~n; 13187#L20 assume !(~n < 1); 13062#L22 assume !(1 == ~n); 13065#L25 call #t~ret9 := fibo1(~n - 1);< 13182#fibo1ENTRY ~n := #in~n; 13180#L10 assume !(~n < 1); 13178#L12 assume !(1 == ~n); 13175#L15 [2020-10-20 08:01:05,663 INFO L796 eck$LassoCheckResult]: Loop: 13175#L15 call #t~ret7 := fibo2(~n - 1);< 13176#fibo2ENTRY ~n := #in~n; 13183#L20 assume !(~n < 1); 13184#L22 assume !(1 == ~n); 13172#L25 call #t~ret9 := fibo1(~n - 1);< 13182#fibo1ENTRY ~n := #in~n; 13180#L10 assume !(~n < 1); 13178#L12 assume !(1 == ~n); 13175#L15 [2020-10-20 08:01:05,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:05,663 INFO L82 PathProgramCache]: Analyzing trace with hash -1632318521, now seen corresponding path program 3 times [2020-10-20 08:01:05,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:01:05,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207908855] [2020-10-20 08:01:05,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:01:05,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:05,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-20 08:01:05,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:05,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 08:01:05,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:05,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 08:01:05,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:05,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-20 08:01:05,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:05,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-20 08:01:05,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:05,834 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 65 proven. 23 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-20 08:01:05,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207908855] [2020-10-20 08:01:05,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903740791] [2020-10-20 08:01:05,835 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 08:01:05,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-20 08:01:05,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 08:01:05,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-20 08:01:05,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:05,970 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 65 proven. 23 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-20 08:01:05,971 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 08:01:05,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 18 [2020-10-20 08:01:05,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658254280] [2020-10-20 08:01:05,971 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-20 08:01:05,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:05,972 INFO L82 PathProgramCache]: Analyzing trace with hash 1544065082, now seen corresponding path program 4 times [2020-10-20 08:01:05,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:01:05,972 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046159485] [2020-10-20 08:01:05,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:01:05,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:01:05,974 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:01:05,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:01:05,975 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:01:05,976 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 08:01:06,093 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 08:01:06,093 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 08:01:06,093 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 08:01:06,093 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 08:01:06,094 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-20 08:01:06,094 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:06,094 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 08:01:06,094 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 08:01:06,094 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_6-2.c_Iteration10_Loop [2020-10-20 08:01:06,094 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 08:01:06,095 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 08:01:06,095 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:06,108 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:06,110 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:06,113 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:06,117 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:06,120 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:06,122 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:06,124 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:06,126 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:06,201 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 08:01:06,201 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:06,206 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:01:06,206 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:01:06,232 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-20 08:01:06,232 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 84 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:08,331 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-20 08:01:08,332 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 08:01:08,332 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 08:01:08,333 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 08:01:08,333 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 08:01:08,333 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-20 08:01:08,333 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:08,333 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 08:01:08,333 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 08:01:08,333 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_6-2.c_Iteration10_Loop [2020-10-20 08:01:08,333 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 08:01:08,333 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 08:01:08,334 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:08,347 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:08,349 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:08,352 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:08,354 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:08,356 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:08,357 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:08,359 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:08,361 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:08,444 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 08:01:08,445 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:08,448 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 08:01:08,450 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:08,450 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:08,451 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:08,451 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:08,451 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:08,452 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:08,452 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:08,454 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-20 08:01:08,457 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-20 08:01:08,457 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:08,460 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-20 08:01:08,460 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-20 08:01:08,461 INFO L510 LassoAnalysis]: Proved termination. [2020-10-20 08:01:08,461 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo1_~n) = 1*fibo1_~n Supporting invariants [] [2020-10-20 08:01:08,481 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-20 08:01:08,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:08,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:08,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-20 08:01:08,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:08,585 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:08,587 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:08,589 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:08,591 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:08,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:08,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-20 08:01:08,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:08,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 08:01:08,660 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 [2020-10-20 08:01:08,660 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 264 states and 292 transitions. cyclomatic complexity: 31 Second operand 8 states. [2020-10-20 08:01:08,790 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 264 states and 292 transitions. cyclomatic complexity: 31. Second operand 8 states. Result 288 states and 316 transitions. Complement of second has 19 states. [2020-10-20 08:01:08,791 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 [2020-10-20 08:01:08,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-20 08:01:08,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 20 transitions. [2020-10-20 08:01:08,792 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 20 transitions. Stem has 61 letters. Loop has 8 letters. [2020-10-20 08:01:08,792 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:08,792 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-20 08:01:08,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:08,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:08,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-20 08:01:08,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:08,898 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:08,900 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:08,901 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:08,903 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:08,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:08,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-20 08:01:08,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:09,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 08:01:09,033 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 [2020-10-20 08:01:09,034 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 264 states and 292 transitions. cyclomatic complexity: 31 Second operand 8 states. [2020-10-20 08:01:09,160 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 264 states and 292 transitions. cyclomatic complexity: 31. Second operand 8 states. Result 288 states and 316 transitions. Complement of second has 21 states. [2020-10-20 08:01:09,161 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 [2020-10-20 08:01:09,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-20 08:01:09,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 19 transitions. [2020-10-20 08:01:09,161 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 19 transitions. Stem has 61 letters. Loop has 8 letters. [2020-10-20 08:01:09,162 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:09,162 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-20 08:01:09,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:09,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:09,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-20 08:01:09,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:09,270 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:09,272 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:09,273 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:09,275 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:09,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:09,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-20 08:01:09,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:09,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 08:01:09,348 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 [2020-10-20 08:01:09,348 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 264 states and 292 transitions. cyclomatic complexity: 31 Second operand 8 states. [2020-10-20 08:01:09,508 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 264 states and 292 transitions. cyclomatic complexity: 31. Second operand 8 states. Result 606 states and 695 transitions. Complement of second has 33 states. [2020-10-20 08:01:09,509 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 [2020-10-20 08:01:09,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-20 08:01:09,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 43 transitions. [2020-10-20 08:01:09,510 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 43 transitions. Stem has 61 letters. Loop has 8 letters. [2020-10-20 08:01:09,510 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:09,511 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 43 transitions. Stem has 69 letters. Loop has 8 letters. [2020-10-20 08:01:09,511 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:09,511 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 43 transitions. Stem has 61 letters. Loop has 16 letters. [2020-10-20 08:01:09,512 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:09,512 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 606 states and 695 transitions. [2020-10-20 08:01:09,518 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-10-20 08:01:09,518 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 606 states to 0 states and 0 transitions. [2020-10-20 08:01:09,518 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2020-10-20 08:01:09,518 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2020-10-20 08:01:09,519 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2020-10-20 08:01:09,519 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-20 08:01:09,519 INFO L691 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-20 08:01:09,519 INFO L714 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-20 08:01:09,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 08:01:09,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-20 08:01:09,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2020-10-20 08:01:09,520 INFO L87 Difference]: Start difference. First operand 0 states and 0 transitions. Second operand 18 states. [2020-10-20 08:01:09,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 08:01:09,520 INFO L93 Difference]: Finished difference Result 0 states and 0 transitions. [2020-10-20 08:01:09,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-20 08:01:09,521 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 0 states and 0 transitions. [2020-10-20 08:01:09,521 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-10-20 08:01:09,521 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 0 states to 0 states and 0 transitions. [2020-10-20 08:01:09,521 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2020-10-20 08:01:09,521 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2020-10-20 08:01:09,522 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2020-10-20 08:01:09,522 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-20 08:01:09,522 INFO L691 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-20 08:01:09,522 INFO L714 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-20 08:01:09,522 INFO L594 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-20 08:01:09,522 INFO L427 BuchiCegarLoop]: ======== Iteration 11============ [2020-10-20 08:01:09,523 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2020-10-20 08:01:09,523 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-10-20 08:01:09,523 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2020-10-20 08:01:09,530 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 20.10 08:01:09 BoogieIcfgContainer [2020-10-20 08:01:09,530 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2020-10-20 08:01:09,530 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 08:01:09,531 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 08:01:09,531 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 08:01:09,531 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 08:00:48" (3/4) ... [2020-10-20 08:01:09,535 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-10-20 08:01:09,535 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 08:01:09,537 INFO L168 Benchmark]: Toolchain (without parser) took 22242.31 ms. Allocated memory was 35.7 MB in the beginning and 127.9 MB in the end (delta: 92.3 MB). Free memory was 16.3 MB in the beginning and 96.2 MB in the end (delta: -79.9 MB). Peak memory consumption was 12.4 MB. Max. memory is 14.3 GB. [2020-10-20 08:01:09,538 INFO L168 Benchmark]: CDTParser took 1.20 ms. Allocated memory is still 34.1 MB. Free memory was 9.7 MB in the beginning and 9.7 MB in the end (delta: 43.8 kB). Peak memory consumption was 43.8 kB. Max. memory is 14.3 GB. [2020-10-20 08:01:09,538 INFO L168 Benchmark]: CACSL2BoogieTranslator took 340.75 ms. Allocated memory was 35.7 MB in the beginning and 44.0 MB in the end (delta: 8.4 MB). Free memory was 15.4 MB in the beginning and 26.1 MB in the end (delta: -10.7 MB). Peak memory consumption was 10.1 MB. Max. memory is 14.3 GB. [2020-10-20 08:01:09,539 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.21 ms. Allocated memory is still 44.0 MB. Free memory was 25.9 MB in the beginning and 24.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.5 MB. Max. memory is 14.3 GB. [2020-10-20 08:01:09,539 INFO L168 Benchmark]: Boogie Preprocessor took 22.58 ms. Allocated memory is still 44.0 MB. Free memory was 24.4 MB in the beginning and 23.2 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.2 MB. Max. memory is 14.3 GB. [2020-10-20 08:01:09,540 INFO L168 Benchmark]: RCFGBuilder took 312.31 ms. Allocated memory was 44.0 MB in the beginning and 45.6 MB in the end (delta: 1.6 MB). Free memory was 23.1 MB in the beginning and 21.4 MB in the end (delta: 1.6 MB). Peak memory consumption was 11.6 MB. Max. memory is 14.3 GB. [2020-10-20 08:01:09,541 INFO L168 Benchmark]: BuchiAutomizer took 21514.49 ms. Allocated memory was 45.6 MB in the beginning and 127.9 MB in the end (delta: 82.3 MB). Free memory was 21.4 MB in the beginning and 96.2 MB in the end (delta: -74.7 MB). Peak memory consumption was 7.6 MB. Max. memory is 14.3 GB. [2020-10-20 08:01:09,541 INFO L168 Benchmark]: Witness Printer took 4.67 ms. Allocated memory is still 127.9 MB. Free memory is still 96.2 MB. There was no memory consumed. Max. memory is 14.3 GB. [2020-10-20 08:01:09,544 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.20 ms. Allocated memory is still 34.1 MB. Free memory was 9.7 MB in the beginning and 9.7 MB in the end (delta: 43.8 kB). Peak memory consumption was 43.8 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 340.75 ms. Allocated memory was 35.7 MB in the beginning and 44.0 MB in the end (delta: 8.4 MB). Free memory was 15.4 MB in the beginning and 26.1 MB in the end (delta: -10.7 MB). Peak memory consumption was 10.1 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 35.21 ms. Allocated memory is still 44.0 MB. Free memory was 25.9 MB in the beginning and 24.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.5 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 22.58 ms. Allocated memory is still 44.0 MB. Free memory was 24.4 MB in the beginning and 23.2 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.2 MB. Max. memory is 14.3 GB. * RCFGBuilder took 312.31 ms. Allocated memory was 44.0 MB in the beginning and 45.6 MB in the end (delta: 1.6 MB). Free memory was 23.1 MB in the beginning and 21.4 MB in the end (delta: 1.6 MB). Peak memory consumption was 11.6 MB. Max. memory is 14.3 GB. * BuchiAutomizer took 21514.49 ms. Allocated memory was 45.6 MB in the beginning and 127.9 MB in the end (delta: 82.3 MB). Free memory was 21.4 MB in the beginning and 96.2 MB in the end (delta: -74.7 MB). Peak memory consumption was 7.6 MB. Max. memory is 14.3 GB. * Witness Printer took 4.67 ms. Allocated memory is still 127.9 MB. Free memory is still 96.2 MB. There was no memory consumed. Max. memory is 14.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 15 terminating modules (9 trivial, 2 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 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 19 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 21.4s and 11 iterations. TraceHistogramMax:8. Analysis of lassos took 12.0s. Construction of modules took 2.4s. Büchi inclusion checks took 6.3s. Highest rank in rank-based complementation 3. Minimization of det autom 2. Minimization of nondet autom 13. Automata minimization 0.2s AutomataMinimizationTime, 13 MinimizatonAttempts, 191 StatesRemovedByMinimization, 13 NontrivialMinimizations. Non-live state removal took 0.1s Buchi closure took 0.0s. Biggest automaton had 264 states and ocurred in iteration 9. Nontrivial modules had stage [2, 0, 4, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/6 HoareTripleCheckerStatistics: 437 SDtfs, 1089 SDslu, 1194 SDs, 0 SdLazy, 2786 SolverSat, 572 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.4s Time LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT1 conc0 concLT0 SILN0 SILU0 SILI4 SILT5 lasso0 LassoPreprocessingBenchmarks: Lassos: inital20 mio100 ax100 hnf79 lsp93 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq186 hnf93 smp75 dnf100 smp100 tf110 neg96 sie107 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 22ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 23 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 6 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 4.2s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...