./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/recursive-simple/fibo_7-1.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_7-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(F end) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c81a149fe338374de067d63dbdea0d00d3f8a8fa ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 08:01:06,063 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 08:01:06,065 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 08:01:06,089 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 08:01:06,089 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 08:01:06,090 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 08:01:06,092 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 08:01:06,094 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 08:01:06,095 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 08:01:06,103 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 08:01:06,105 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 08:01:06,106 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 08:01:06,106 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 08:01:06,107 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 08:01:06,108 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 08:01:06,109 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 08:01:06,110 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 08:01:06,111 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 08:01:06,113 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 08:01:06,115 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 08:01:06,116 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 08:01:06,117 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 08:01:06,118 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 08:01:06,119 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 08:01:06,122 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 08:01:06,122 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 08:01:06,122 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 08:01:06,123 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 08:01:06,124 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 08:01:06,125 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 08:01:06,125 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 08:01:06,126 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 08:01:06,127 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 08:01:06,128 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 08:01:06,129 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 08:01:06,129 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 08:01:06,130 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 08:01:06,130 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 08:01:06,130 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 08:01:06,131 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 08:01:06,132 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 08:01:06,133 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-32bit-Automizer_Default.epf [2020-10-20 08:01:06,162 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 08:01:06,163 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 08:01:06,164 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 08:01:06,167 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 08:01:06,167 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 08:01:06,168 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2020-10-20 08:01:06,168 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2020-10-20 08:01:06,168 INFO L138 SettingsManager]: * Use old map elimination=false [2020-10-20 08:01:06,168 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2020-10-20 08:01:06,169 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2020-10-20 08:01:06,169 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2020-10-20 08:01:06,169 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 08:01:06,169 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-20 08:01:06,170 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-10-20 08:01:06,170 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-20 08:01:06,171 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-20 08:01:06,172 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 08:01:06,172 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2020-10-20 08:01:06,172 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2020-10-20 08:01:06,172 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2020-10-20 08:01:06,173 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-20 08:01:06,173 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-20 08:01:06,173 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2020-10-20 08:01:06,174 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 08:01:06,174 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2020-10-20 08:01:06,174 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 08:01:06,175 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 08:01:06,175 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2020-10-20 08:01:06,176 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 08:01:06,176 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-20 08:01:06,176 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 08:01:06,176 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2020-10-20 08:01:06,178 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2020-10-20 08:01:06,178 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 -> c81a149fe338374de067d63dbdea0d00d3f8a8fa [2020-10-20 08:01:06,432 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 08:01:06,445 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 08:01:06,449 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 08:01:06,451 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 08:01:06,452 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 08:01:06,453 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/fibo_7-1.c [2020-10-20 08:01:06,532 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6cb8f4be6/5f37084dfbab4abebc4a6914434c0f21/FLAGcfd08164c [2020-10-20 08:01:06,940 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 08:01:06,941 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_7-1.c [2020-10-20 08:01:06,949 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6cb8f4be6/5f37084dfbab4abebc4a6914434c0f21/FLAGcfd08164c [2020-10-20 08:01:07,309 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6cb8f4be6/5f37084dfbab4abebc4a6914434c0f21 [2020-10-20 08:01:07,313 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 08:01:07,320 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-20 08:01:07,321 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 08:01:07,321 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 08:01:07,325 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 08:01:07,326 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 08:01:07" (1/1) ... [2020-10-20 08:01:07,329 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5dd461a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 08:01:07, skipping insertion in model container [2020-10-20 08:01:07,329 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 08:01:07" (1/1) ... [2020-10-20 08:01:07,338 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 08:01:07,355 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 08:01:07,604 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 08:01:07,617 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 08:01:07,634 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 08:01:07,652 INFO L208 MainTranslator]: Completed translation [2020-10-20 08:01:07,652 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 08:01:07 WrapperNode [2020-10-20 08:01:07,652 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 08:01:07,653 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-20 08:01:07,653 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-20 08:01:07,653 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-20 08:01:07,663 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 08:01:07" (1/1) ... [2020-10-20 08:01:07,672 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 08:01:07" (1/1) ... [2020-10-20 08:01:07,694 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-20 08:01:07,694 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 08:01:07,694 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 08:01:07,694 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 08:01:07,705 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 08:01:07" (1/1) ... [2020-10-20 08:01:07,705 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 08:01:07" (1/1) ... [2020-10-20 08:01:07,706 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 08:01:07" (1/1) ... [2020-10-20 08:01:07,707 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 08:01:07" (1/1) ... [2020-10-20 08:01:07,710 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 08:01:07" (1/1) ... [2020-10-20 08:01:07,712 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 08:01:07" (1/1) ... [2020-10-20 08:01:07,713 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 08:01:07" (1/1) ... [2020-10-20 08:01:07,715 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 08:01:07,716 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 08:01:07,716 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 08:01:07,716 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 08:01:07,717 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 08:01:07" (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 08:01:07,795 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 08:01:07,795 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 08:01:07,795 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-20 08:01:07,795 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-20 08:01:07,795 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2020-10-20 08:01:07,795 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2020-10-20 08:01:08,021 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 08:01:08,022 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-20 08:01:08,024 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 08:01:08 BoogieIcfgContainer [2020-10-20 08:01:08,024 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 08:01:08,025 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2020-10-20 08:01:08,025 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2020-10-20 08:01:08,028 INFO L275 PluginConnector]: BuchiAutomizer initialized [2020-10-20 08:01:08,029 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-20 08:01:08,029 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 20.10 08:01:07" (1/3) ... [2020-10-20 08:01:08,031 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@1779c927 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 20.10 08:01:08, skipping insertion in model container [2020-10-20 08:01:08,031 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-20 08:01:08,031 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 08:01:07" (2/3) ... [2020-10-20 08:01:08,031 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@1779c927 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 20.10 08:01:08, skipping insertion in model container [2020-10-20 08:01:08,031 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-20 08:01:08,032 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 08:01:08" (3/3) ... [2020-10-20 08:01:08,033 INFO L373 chiAutomizerObserver]: Analyzing ICFG fibo_7-1.c [2020-10-20 08:01:08,119 INFO L359 BuchiCegarLoop]: Interprodecural is true [2020-10-20 08:01:08,120 INFO L360 BuchiCegarLoop]: Hoare is false [2020-10-20 08:01:08,120 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2020-10-20 08:01:08,120 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 08:01:08,120 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 08:01:08,120 INFO L364 BuchiCegarLoop]: Difference is false [2020-10-20 08:01:08,121 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 08:01:08,121 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2020-10-20 08:01:08,158 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 19 states. [2020-10-20 08:01:08,203 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-10-20 08:01:08,204 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 08:01:08,204 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 08:01:08,212 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2020-10-20 08:01:08,213 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-10-20 08:01:08,213 INFO L427 BuchiCegarLoop]: ======== Iteration 1============ [2020-10-20 08:01:08,213 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 19 states. [2020-10-20 08:01:08,215 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-10-20 08:01:08,216 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 08:01:08,216 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 08:01:08,216 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2020-10-20 08:01:08,216 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-10-20 08:01:08,225 INFO L794 eck$LassoCheckResult]: Stem: 13#ULTIMATE.startENTRYtrue #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(11);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 11#L-1true havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 7; 8#L27true call main_#t~ret9 := fibo(main_~x~0);< 16#fiboENTRYtrue [2020-10-20 08:01:08,225 INFO L796 eck$LassoCheckResult]: Loop: 16#fiboENTRYtrue ~n := #in~n; 14#L8true assume !(~n < 1); 18#L10true assume !(1 == ~n); 7#L13true call #t~ret7 := fibo(~n - 1);< 16#fiboENTRYtrue [2020-10-20 08:01:08,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:08,231 INFO L82 PathProgramCache]: Analyzing trace with hash 29885, now seen corresponding path program 1 times [2020-10-20 08:01:08,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:01:08,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050407303] [2020-10-20 08:01:08,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:01:08,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:01:08,351 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:01:08,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:01:08,386 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:01:08,410 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 08:01:08,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:08,412 INFO L82 PathProgramCache]: Analyzing trace with hash 1512524, now seen corresponding path program 1 times [2020-10-20 08:01:08,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:01:08,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321274796] [2020-10-20 08:01:08,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:01:08,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:01:08,419 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:01:08,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:01:08,422 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:01:08,424 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 08:01:08,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:08,426 INFO L82 PathProgramCache]: Analyzing trace with hash 1830210312, now seen corresponding path program 1 times [2020-10-20 08:01:08,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:01:08,427 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162137769] [2020-10-20 08:01:08,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:01:08,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:01:08,445 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:01:08,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:01:08,461 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:01:08,467 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 08:01:08,574 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 08:01:08,575 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 08:01:08,575 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 08:01:08,576 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 08:01:08,576 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-20 08:01:08,576 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:08,576 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 08:01:08,576 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 08:01:08,577 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-1.c_Iteration1_Loop [2020-10-20 08:01:08,577 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 08:01:08,577 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 08:01:08,597 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 08:01:08,605 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 08:01:08,609 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 08:01:08,615 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 08:01:08,622 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 08:01:08,719 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 08:01:08,720 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 08:01:08,734 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:01:08,734 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 08:01:08,747 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:01:08,747 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_~n=0} Honda state: {fibo_~n=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) [2020-10-20 08:01:08,790 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:01:08,790 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:08,795 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:01:08,795 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#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) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:08,829 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:01:08,830 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:01:08,835 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:01:08,835 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret7=0} Honda state: {fibo_#t~ret7=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 08:01:08,860 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:01:08,860 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:01:08,869 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:01:08,869 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret8=0} Honda state: {fibo_#t~ret8=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 08:01:08,894 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:01:08,894 INFO L160 nArgumentSynthesizer]: Using integer mode. 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 08:01:08,921 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-20 08:01:08,921 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:01:08,960 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-20 08:01:08,962 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 08:01:08,963 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 08:01:08,963 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 08:01:08,964 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 08:01:08,964 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-20 08:01:08,964 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:08,964 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 08:01:08,964 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 08:01:08,965 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-1.c_Iteration1_Loop [2020-10-20 08:01:08,965 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 08:01:08,965 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 08:01:08,967 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 08:01:08,972 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 08:01:08,976 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 08:01:08,980 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 08:01:08,983 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 08:01:09,041 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 08:01:09,052 INFO L489 LassoAnalysis]: Using template 'affine'. 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 08:01:09,064 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 08:01:09,067 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:09,067 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:09,068 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:09,068 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:09,068 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:09,071 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:09,071 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:09,078 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 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 08:01:09,109 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 08:01:09,110 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:09,110 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:09,111 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:09,111 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:09,111 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:09,112 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:09,112 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:09,114 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 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 08:01:09,148 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 08:01:09,149 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:09,150 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:09,150 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:09,150 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:09,150 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:09,151 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:09,151 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:09,153 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 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 08:01:09,178 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 08:01:09,180 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:09,180 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:09,180 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:09,180 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:09,180 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:09,181 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:09,181 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:09,183 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 12 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 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:09,222 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 08:01:09,223 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:09,223 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:09,224 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:09,224 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:09,224 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:09,225 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:09,225 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:09,231 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-20 08:01:09,236 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-20 08:01:09,236 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 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 08:01:09,251 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-20 08:01:09,252 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-20 08:01:09,252 INFO L510 LassoAnalysis]: Proved termination. [2020-10-20 08:01:09,253 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_#in~n) = 1*fibo_#in~n Supporting invariants [] [2020-10-20 08:01:09,275 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-20 08:01:09,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:09,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:09,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-20 08:01:09,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:09,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:09,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-20 08:01:09,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:09,388 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 08:01:09,407 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2020-10-20 08:01:09,409 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 19 states. Second operand 4 states. [2020-10-20 08:01:09,585 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 19 states.. Second operand 4 states. Result 49 states and 61 transitions. Complement of second has 12 states. [2020-10-20 08:01:09,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2020-10-20 08:01:09,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-20 08:01:09,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 11 transitions. [2020-10-20 08:01:09,591 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 3 letters. Loop has 4 letters. [2020-10-20 08:01:09,593 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:09,593 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 7 letters. Loop has 4 letters. [2020-10-20 08:01:09,593 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:09,594 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 3 letters. Loop has 8 letters. [2020-10-20 08:01:09,594 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:09,595 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 49 states and 61 transitions. [2020-10-20 08:01:09,600 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-10-20 08:01:09,607 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 49 states to 25 states and 34 transitions. [2020-10-20 08:01:09,608 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 17 [2020-10-20 08:01:09,609 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 18 [2020-10-20 08:01:09,609 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 34 transitions. [2020-10-20 08:01:09,610 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 08:01:09,610 INFO L691 BuchiCegarLoop]: Abstraction has 25 states and 34 transitions. [2020-10-20 08:01:09,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states and 34 transitions. [2020-10-20 08:01:09,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 20. [2020-10-20 08:01:09,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-20 08:01:09,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 26 transitions. [2020-10-20 08:01:09,645 INFO L714 BuchiCegarLoop]: Abstraction has 20 states and 26 transitions. [2020-10-20 08:01:09,645 INFO L594 BuchiCegarLoop]: Abstraction has 20 states and 26 transitions. [2020-10-20 08:01:09,645 INFO L427 BuchiCegarLoop]: ======== Iteration 2============ [2020-10-20 08:01:09,646 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 20 states and 26 transitions. [2020-10-20 08:01:09,647 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-10-20 08:01:09,647 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 08:01:09,647 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 08:01:09,648 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 08:01:09,649 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 08:01:09,649 INFO L794 eck$LassoCheckResult]: Stem: 132#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(11);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 130#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 7; 128#L27 call main_#t~ret9 := fibo(main_~x~0);< 138#fiboENTRY ~n := #in~n; 136#L8 assume !(~n < 1); 137#L10 assume !(1 == ~n); 125#L13 call #t~ret7 := fibo(~n - 1);< 131#fiboENTRY ~n := #in~n; 133#L8 assume ~n < 1;#res := 0; 134#fiboFINAL assume true; 124#fiboEXIT >#35#return; 126#L13-1 [2020-10-20 08:01:09,649 INFO L796 eck$LassoCheckResult]: Loop: 126#L13-1 call #t~ret8 := fibo(~n - 2);< 129#fiboENTRY ~n := #in~n; 143#L8 assume !(~n < 1); 142#L10 assume !(1 == ~n); 127#L13 call #t~ret7 := fibo(~n - 1);< 129#fiboENTRY ~n := #in~n; 143#L8 assume ~n < 1;#res := 0; 140#fiboFINAL assume true; 141#fiboEXIT >#35#return; 126#L13-1 [2020-10-20 08:01:09,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:09,650 INFO L82 PathProgramCache]: Analyzing trace with hash 523436175, now seen corresponding path program 1 times [2020-10-20 08:01:09,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:01:09,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295317544] [2020-10-20 08:01:09,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:01:09,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:09,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-20 08:01:09,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:09,781 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 08:01:09,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295317544] [2020-10-20 08:01:09,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 08:01:09,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-20 08:01:09,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389059760] [2020-10-20 08:01:09,786 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-20 08:01:09,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:09,787 INFO L82 PathProgramCache]: Analyzing trace with hash 1950983701, now seen corresponding path program 1 times [2020-10-20 08:01:09,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:01:09,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309139527] [2020-10-20 08:01:09,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:01:09,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:09,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-20 08:01:09,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:09,842 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-20 08:01:09,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309139527] [2020-10-20 08:01:09,843 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 08:01:09,843 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-20 08:01:09,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493690711] [2020-10-20 08:01:09,844 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-10-20 08:01:09,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 08:01:09,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-20 08:01:09,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-20 08:01:09,848 INFO L87 Difference]: Start difference. First operand 20 states and 26 transitions. cyclomatic complexity: 8 Second operand 6 states. [2020-10-20 08:01:09,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 08:01:09,930 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2020-10-20 08:01:09,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-20 08:01:09,931 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 26 states and 32 transitions. [2020-10-20 08:01:09,933 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-10-20 08:01:09,935 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 26 states to 24 states and 30 transitions. [2020-10-20 08:01:09,935 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 20 [2020-10-20 08:01:09,935 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 20 [2020-10-20 08:01:09,935 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 30 transitions. [2020-10-20 08:01:09,936 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 08:01:09,936 INFO L691 BuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2020-10-20 08:01:09,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states and 30 transitions. [2020-10-20 08:01:09,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-20 08:01:09,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-20 08:01:09,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2020-10-20 08:01:09,941 INFO L714 BuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2020-10-20 08:01:09,941 INFO L594 BuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2020-10-20 08:01:09,941 INFO L427 BuchiCegarLoop]: ======== Iteration 3============ [2020-10-20 08:01:09,941 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 24 states and 30 transitions. [2020-10-20 08:01:09,942 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-10-20 08:01:09,942 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 08:01:09,942 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 08:01:09,944 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 08:01:09,944 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2020-10-20 08:01:09,944 INFO L794 eck$LassoCheckResult]: Stem: 205#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(11);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 200#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 7; 201#L27 call main_#t~ret9 := fibo(main_~x~0);< 208#fiboENTRY ~n := #in~n; 211#L8 assume !(~n < 1); 212#L10 assume !(1 == ~n); 198#L13 call #t~ret7 := fibo(~n - 1);< 204#fiboENTRY ~n := #in~n; 209#L8 assume !(~n < 1); 210#L10 assume 1 == ~n;#res := 1; 213#fiboFINAL assume true; 197#fiboEXIT >#35#return; 199#L13-1 [2020-10-20 08:01:09,944 INFO L796 eck$LassoCheckResult]: Loop: 199#L13-1 call #t~ret8 := fibo(~n - 2);< 203#fiboENTRY ~n := #in~n; 218#L8 assume !(~n < 1); 217#L10 assume !(1 == ~n); 202#L13 call #t~ret7 := fibo(~n - 1);< 203#fiboENTRY ~n := #in~n; 218#L8 assume !(~n < 1); 217#L10 assume !(1 == ~n); 202#L13 call #t~ret7 := fibo(~n - 1);< 203#fiboENTRY ~n := #in~n; 218#L8 assume !(~n < 1); 217#L10 assume 1 == ~n;#res := 1; 206#fiboFINAL assume true; 207#fiboEXIT >#35#return; 199#L13-1 call #t~ret8 := fibo(~n - 2);< 203#fiboENTRY ~n := #in~n; 218#L8 assume ~n < 1;#res := 0; 219#fiboFINAL assume true; 216#fiboEXIT >#37#return; 214#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 215#fiboFINAL assume true; 220#fiboEXIT >#35#return; 199#L13-1 [2020-10-20 08:01:09,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:09,945 INFO L82 PathProgramCache]: Analyzing trace with hash -953322862, now seen corresponding path program 1 times [2020-10-20 08:01:09,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:01:09,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687921802] [2020-10-20 08:01:09,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:01:09,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:09,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-20 08:01:09,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:10,006 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 08:01:10,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687921802] [2020-10-20 08:01:10,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380562519] [2020-10-20 08:01:10,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 08:01:10,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:10,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-20 08:01:10,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:10,086 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 08:01:10,087 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 08:01:10,087 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-20 08:01:10,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31880566] [2020-10-20 08:01:10,088 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-20 08:01:10,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:10,088 INFO L82 PathProgramCache]: Analyzing trace with hash -2000232554, now seen corresponding path program 1 times [2020-10-20 08:01:10,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:01:10,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718524811] [2020-10-20 08:01:10,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:01:10,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:01:10,098 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:01:10,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:01:10,113 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:01:10,118 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 08:01:10,357 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 08:01:10,358 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 08:01:10,358 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 08:01:10,358 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 08:01:10,358 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-20 08:01:10,359 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:10,359 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 08:01:10,359 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 08:01:10,360 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-1.c_Iteration3_Loop [2020-10-20 08:01:10,360 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 08:01:10,361 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 08:01:10,362 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 08:01:10,366 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 08:01:10,368 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 08:01:10,371 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 08:01:10,417 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 08:01:10,417 INFO L404 LassoAnalysis]: Checking for nontermination... 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) [2020-10-20 08:01:10,429 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:01:10,429 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:10,433 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:01:10,433 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret7=1} Honda state: {fibo_#t~ret7=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] 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 08:01:10,477 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:01:10,478 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:10,482 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:01:10,482 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] 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 08:01:10,528 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:01:10,529 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:10,533 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:01:10,533 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret8=0} Honda state: {fibo_#t~ret8=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] 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 08:01:10,578 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:01:10,579 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 18 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 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:01:10,625 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-20 08:01:10,625 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:11,457 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-20 08:01:11,460 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 08:01:11,460 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 08:01:11,460 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 08:01:11,460 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 08:01:11,460 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-20 08:01:11,461 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:11,461 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 08:01:11,461 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 08:01:11,461 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-1.c_Iteration3_Loop [2020-10-20 08:01:11,461 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 08:01:11,462 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 08:01:11,463 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 08:01:11,466 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 08:01:11,468 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 08:01:11,475 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 08:01:11,517 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 08:01:11,517 INFO L489 LassoAnalysis]: Using template 'affine'. 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) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:11,542 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 08:01:11,544 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:11,544 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:11,544 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:11,550 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:11,550 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:11,551 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:11,551 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:11,555 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 21 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 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:11,616 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 08:01:11,619 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:11,619 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:11,619 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:11,619 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:11,619 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:11,621 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:11,622 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:11,624 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 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:01:11,674 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 08:01:11,678 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:11,678 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:11,678 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:11,678 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:11,679 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:11,681 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:11,681 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:11,685 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:11,690 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-20 08:01:11,690 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 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:01:11,694 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-20 08:01:11,695 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-20 08:01:11,695 INFO L510 LassoAnalysis]: Proved termination. [2020-10-20 08:01:11,695 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:11,728 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-20 08:01:11,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:11,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:11,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-20 08:01:11,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:11,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:11,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-20 08:01:11,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:11,955 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-20 08:01:11,956 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 7 loop predicates [2020-10-20 08:01:11,956 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 24 states and 30 transitions. cyclomatic complexity: 8 Second operand 9 states. [2020-10-20 08:01:12,240 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 24 states and 30 transitions. cyclomatic complexity: 8. Second operand 9 states. Result 159 states and 215 transitions. Complement of second has 48 states. [2020-10-20 08:01:12,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 10 states 2 stem states 7 non-accepting loop states 1 accepting loop states [2020-10-20 08:01:12,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-10-20 08:01:12,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 41 transitions. [2020-10-20 08:01:12,242 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 41 transitions. Stem has 12 letters. Loop has 22 letters. [2020-10-20 08:01:12,243 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:12,243 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 41 transitions. Stem has 34 letters. Loop has 22 letters. [2020-10-20 08:01:12,244 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:12,244 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 41 transitions. Stem has 12 letters. Loop has 44 letters. [2020-10-20 08:01:12,245 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:12,246 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 159 states and 215 transitions. [2020-10-20 08:01:12,256 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 15 [2020-10-20 08:01:12,263 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 159 states to 128 states and 180 transitions. [2020-10-20 08:01:12,263 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 74 [2020-10-20 08:01:12,264 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 79 [2020-10-20 08:01:12,264 INFO L73 IsDeterministic]: Start isDeterministic. Operand 128 states and 180 transitions. [2020-10-20 08:01:12,266 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 08:01:12,266 INFO L691 BuchiCegarLoop]: Abstraction has 128 states and 180 transitions. [2020-10-20 08:01:12,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states and 180 transitions. [2020-10-20 08:01:12,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 106. [2020-10-20 08:01:12,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-20 08:01:12,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 140 transitions. [2020-10-20 08:01:12,285 INFO L714 BuchiCegarLoop]: Abstraction has 106 states and 140 transitions. [2020-10-20 08:01:12,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 08:01:12,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-20 08:01:12,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-20 08:01:12,286 INFO L87 Difference]: Start difference. First operand 106 states and 140 transitions. Second operand 8 states. [2020-10-20 08:01:12,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 08:01:12,392 INFO L93 Difference]: Finished difference Result 125 states and 167 transitions. [2020-10-20 08:01:12,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-20 08:01:12,393 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 125 states and 167 transitions. [2020-10-20 08:01:12,397 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 15 [2020-10-20 08:01:12,401 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 125 states to 122 states and 164 transitions. [2020-10-20 08:01:12,401 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 77 [2020-10-20 08:01:12,402 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 77 [2020-10-20 08:01:12,402 INFO L73 IsDeterministic]: Start isDeterministic. Operand 122 states and 164 transitions. [2020-10-20 08:01:12,403 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 08:01:12,403 INFO L691 BuchiCegarLoop]: Abstraction has 122 states and 164 transitions. [2020-10-20 08:01:12,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states and 164 transitions. [2020-10-20 08:01:12,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 106. [2020-10-20 08:01:12,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-20 08:01:12,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 139 transitions. [2020-10-20 08:01:12,416 INFO L714 BuchiCegarLoop]: Abstraction has 106 states and 139 transitions. [2020-10-20 08:01:12,416 INFO L594 BuchiCegarLoop]: Abstraction has 106 states and 139 transitions. [2020-10-20 08:01:12,416 INFO L427 BuchiCegarLoop]: ======== Iteration 4============ [2020-10-20 08:01:12,416 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 106 states and 139 transitions. [2020-10-20 08:01:12,419 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 15 [2020-10-20 08:01:12,419 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 08:01:12,419 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 08:01:12,420 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [5, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 08:01:12,420 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1] [2020-10-20 08:01:12,420 INFO L794 eck$LassoCheckResult]: Stem: 864#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(11);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 859#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 7; 842#L27 call main_#t~ret9 := fibo(main_~x~0);< 873#fiboENTRY ~n := #in~n; 910#L8 assume !(~n < 1); 882#L10 assume !(1 == ~n); 862#L13 call #t~ret7 := fibo(~n - 1);< 863#fiboENTRY ~n := #in~n; 867#L8 assume !(~n < 1); 869#L10 assume !(1 == ~n); 868#L13 call #t~ret7 := fibo(~n - 1);< 863#fiboENTRY ~n := #in~n; 867#L8 assume !(~n < 1); 869#L10 assume !(1 == ~n); 868#L13 call #t~ret7 := fibo(~n - 1);< 863#fiboENTRY ~n := #in~n; 879#L8 assume !(~n < 1); 909#L10 assume 1 == ~n;#res := 1; 908#fiboFINAL assume true; 907#fiboEXIT >#35#return; 845#L13-1 call #t~ret8 := fibo(~n - 2);< 905#fiboENTRY ~n := #in~n; 912#L8 assume ~n < 1;#res := 0; 945#fiboFINAL assume true; 944#fiboEXIT >#37#return; 941#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 940#fiboFINAL assume true; 938#fiboEXIT >#35#return; 861#L13-1 [2020-10-20 08:01:12,421 INFO L796 eck$LassoCheckResult]: Loop: 861#L13-1 call #t~ret8 := fibo(~n - 2);< 843#fiboENTRY ~n := #in~n; 933#L8 assume !(~n < 1); 880#L10 assume !(1 == ~n); 860#L13 call #t~ret7 := fibo(~n - 1);< 843#fiboENTRY ~n := #in~n; 933#L8 assume !(~n < 1); 880#L10 assume 1 == ~n;#res := 1; 881#fiboFINAL assume true; 935#fiboEXIT >#35#return; 861#L13-1 [2020-10-20 08:01:12,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:12,421 INFO L82 PathProgramCache]: Analyzing trace with hash 1335554545, now seen corresponding path program 1 times [2020-10-20 08:01:12,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:01:12,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469844238] [2020-10-20 08:01:12,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:01:12,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:12,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-20 08:01:12,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:12,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 08:01:12,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:12,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-20 08:01:12,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:12,537 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-20 08:01:12,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469844238] [2020-10-20 08:01:12,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904991663] [2020-10-20 08:01:12,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 08:01:12,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:12,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-20 08:01:12,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:12,610 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-20 08:01:12,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 08:01:12,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-20 08:01:12,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927169405] [2020-10-20 08:01:12,611 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-20 08:01:12,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:12,612 INFO L82 PathProgramCache]: Analyzing trace with hash 350977484, now seen corresponding path program 1 times [2020-10-20 08:01:12,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:01:12,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865843761] [2020-10-20 08:01:12,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:01:12,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:01:12,616 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:01:12,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:01:12,619 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:01:12,621 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 08:01:12,718 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 08:01:12,718 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 08:01:12,719 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 08:01:12,719 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 08:01:12,719 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-20 08:01:12,719 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:12,719 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 08:01:12,719 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 08:01:12,719 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-1.c_Iteration4_Loop [2020-10-20 08:01:12,720 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 08:01:12,720 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 08:01:12,721 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 08:01:12,724 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 08:01:12,732 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 08:01:12,735 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 08:01:12,787 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 08:01:12,787 INFO L404 LassoAnalysis]: Checking for nontermination... 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 08:01:12,791 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:01:12,791 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:01:12,794 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:01:12,794 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=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 08:01:12,818 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:01:12,818 INFO L160 nArgumentSynthesizer]: Using integer mode. 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) [2020-10-20 08:01:12,844 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-20 08:01:12,844 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:13,939 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-20 08:01:13,941 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 08:01:13,941 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 08:01:13,941 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 08:01:13,942 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 08:01:13,942 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-20 08:01:13,942 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:13,942 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 08:01:13,942 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 08:01:13,942 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-1.c_Iteration4_Loop [2020-10-20 08:01:13,942 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 08:01:13,942 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 08:01:13,943 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 08:01:13,948 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 08:01:13,955 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 08:01:13,957 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 08:01:14,003 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 08:01:14,003 INFO L489 LassoAnalysis]: Using template 'affine'. 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) [2020-10-20 08:01:14,013 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 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:14,014 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:14,014 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:14,015 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:14,015 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:14,015 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:14,015 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:14,016 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:14,017 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 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 08:01:14,038 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 08:01:14,039 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:14,039 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:14,040 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:14,040 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:14,040 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:14,041 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:14,041 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:14,046 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-20 08:01:14,049 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-20 08:01:14,049 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 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 08:01:14,055 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-20 08:01:14,056 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-20 08:01:14,056 INFO L510 LassoAnalysis]: Proved termination. [2020-10-20 08:01:14,056 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2020-10-20 08:01:14,076 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-20 08:01:14,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:14,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:14,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-20 08:01:14,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:14,168 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:14,191 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:14,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:14,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-20 08:01:14,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:14,300 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 08:01:14,300 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 08:01:14,301 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 106 states and 139 transitions. cyclomatic complexity: 38 Second operand 8 states. [2020-10-20 08:01:14,566 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 106 states and 139 transitions. cyclomatic complexity: 38. Second operand 8 states. Result 195 states and 261 transitions. Complement of second has 33 states. [2020-10-20 08:01:14,570 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 08:01:14,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-20 08:01:14,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 37 transitions. [2020-10-20 08:01:14,571 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 37 transitions. Stem has 28 letters. Loop has 10 letters. [2020-10-20 08:01:14,571 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:14,571 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-20 08:01:14,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:14,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:14,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-20 08:01:14,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:14,651 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:14,655 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:14,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:14,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-20 08:01:14,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:14,728 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 08:01:14,729 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 08:01:14,729 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 106 states and 139 transitions. cyclomatic complexity: 38 Second operand 8 states. [2020-10-20 08:01:14,938 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 106 states and 139 transitions. cyclomatic complexity: 38. Second operand 8 states. Result 292 states and 393 transitions. Complement of second has 25 states. [2020-10-20 08:01:14,941 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 08:01:14,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-20 08:01:14,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 24 transitions. [2020-10-20 08:01:14,942 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 24 transitions. Stem has 28 letters. Loop has 10 letters. [2020-10-20 08:01:14,942 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:14,942 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-20 08:01:14,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:14,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:14,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-20 08:01:14,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:15,015 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:15,019 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:15,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:15,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-20 08:01:15,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:15,126 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 08:01:15,127 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 08:01:15,127 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 106 states and 139 transitions. cyclomatic complexity: 38 Second operand 8 states. [2020-10-20 08:01:15,419 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 106 states and 139 transitions. cyclomatic complexity: 38. Second operand 8 states. Result 810 states and 1071 transitions. Complement of second has 130 states. [2020-10-20 08:01:15,420 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 08:01:15,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-20 08:01:15,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 42 transitions. [2020-10-20 08:01:15,421 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 42 transitions. Stem has 28 letters. Loop has 10 letters. [2020-10-20 08:01:15,422 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:15,422 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 42 transitions. Stem has 38 letters. Loop has 10 letters. [2020-10-20 08:01:15,423 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:15,423 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 42 transitions. Stem has 28 letters. Loop has 20 letters. [2020-10-20 08:01:15,424 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:15,424 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 810 states and 1071 transitions. [2020-10-20 08:01:15,441 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 44 [2020-10-20 08:01:15,453 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 810 states to 419 states and 599 transitions. [2020-10-20 08:01:15,453 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 159 [2020-10-20 08:01:15,454 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 183 [2020-10-20 08:01:15,454 INFO L73 IsDeterministic]: Start isDeterministic. Operand 419 states and 599 transitions. [2020-10-20 08:01:15,455 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 08:01:15,455 INFO L691 BuchiCegarLoop]: Abstraction has 419 states and 599 transitions. [2020-10-20 08:01:15,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states and 599 transitions. [2020-10-20 08:01:15,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 332. [2020-10-20 08:01:15,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 332 states. [2020-10-20 08:01:15,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 449 transitions. [2020-10-20 08:01:15,496 INFO L714 BuchiCegarLoop]: Abstraction has 332 states and 449 transitions. [2020-10-20 08:01:15,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 08:01:15,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-20 08:01:15,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-20 08:01:15,497 INFO L87 Difference]: Start difference. First operand 332 states and 449 transitions. Second operand 11 states. [2020-10-20 08:01:15,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 08:01:15,768 INFO L93 Difference]: Finished difference Result 504 states and 744 transitions. [2020-10-20 08:01:15,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-20 08:01:15,769 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 504 states and 744 transitions. [2020-10-20 08:01:15,780 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-10-20 08:01:15,797 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 504 states to 502 states and 741 transitions. [2020-10-20 08:01:15,798 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 226 [2020-10-20 08:01:15,800 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 226 [2020-10-20 08:01:15,800 INFO L73 IsDeterministic]: Start isDeterministic. Operand 502 states and 741 transitions. [2020-10-20 08:01:15,800 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 08:01:15,801 INFO L691 BuchiCegarLoop]: Abstraction has 502 states and 741 transitions. [2020-10-20 08:01:15,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states and 741 transitions. [2020-10-20 08:01:15,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 456. [2020-10-20 08:01:15,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 456 states. [2020-10-20 08:01:15,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 677 transitions. [2020-10-20 08:01:15,858 INFO L714 BuchiCegarLoop]: Abstraction has 456 states and 677 transitions. [2020-10-20 08:01:15,858 INFO L594 BuchiCegarLoop]: Abstraction has 456 states and 677 transitions. [2020-10-20 08:01:15,858 INFO L427 BuchiCegarLoop]: ======== Iteration 5============ [2020-10-20 08:01:15,859 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 456 states and 677 transitions. [2020-10-20 08:01:15,863 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-10-20 08:01:15,863 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 08:01:15,863 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 08:01:15,865 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 08:01:15,865 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-10-20 08:01:15,866 INFO L794 eck$LassoCheckResult]: Stem: 3811#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(11);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 3797#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 7; 3798#L27 call main_#t~ret9 := fibo(main_~x~0);< 3819#fiboENTRY ~n := #in~n; 3864#L8 assume !(~n < 1); 3863#L10 assume !(1 == ~n); 3859#L13 call #t~ret7 := fibo(~n - 1);< 3861#fiboENTRY ~n := #in~n; 3862#L8 assume !(~n < 1); 3858#L10 assume !(1 == ~n); 3842#L13 call #t~ret7 := fibo(~n - 1);< 3855#fiboENTRY ~n := #in~n; 3856#L8 assume !(~n < 1); 3860#L10 assume !(1 == ~n); 3841#L13 call #t~ret7 := fibo(~n - 1);< 3855#fiboENTRY ~n := #in~n; 3857#L8 assume !(~n < 1); 3840#L10 assume 1 == ~n;#res := 1; 3843#fiboFINAL assume true; 3915#fiboEXIT >#35#return; 3909#L13-1 call #t~ret8 := fibo(~n - 2);< 3911#fiboENTRY ~n := #in~n; 4104#L8 assume !(~n < 1); 4031#L10 assume !(1 == ~n); 4032#L13 call #t~ret7 := fibo(~n - 1);< 4042#fiboENTRY ~n := #in~n; 4068#L8 assume !(~n < 1); 4049#L10 assume !(1 == ~n); 4050#L13 call #t~ret7 := fibo(~n - 1);< 4060#fiboENTRY [2020-10-20 08:01:15,866 INFO L796 eck$LassoCheckResult]: Loop: 4060#fiboENTRY ~n := #in~n; 4067#L8 assume !(~n < 1); 4066#L10 assume !(1 == ~n); 4059#L13 call #t~ret7 := fibo(~n - 1);< 4060#fiboENTRY [2020-10-20 08:01:15,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:15,866 INFO L82 PathProgramCache]: Analyzing trace with hash -777601154, now seen corresponding path program 1 times [2020-10-20 08:01:15,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:01:15,867 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984247163] [2020-10-20 08:01:15,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:01:15,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:15,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-20 08:01:15,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:15,998 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 30 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-20 08:01:15,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984247163] [2020-10-20 08:01:15,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21424958] [2020-10-20 08:01:15,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 08:01:16,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:16,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-20 08:01:16,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:16,063 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 30 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-20 08:01:16,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 08:01:16,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-20 08:01:16,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589713509] [2020-10-20 08:01:16,064 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-20 08:01:16,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:16,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1512524, now seen corresponding path program 2 times [2020-10-20 08:01:16,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:01:16,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783411059] [2020-10-20 08:01:16,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:01:16,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:01:16,068 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:01:16,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:01:16,070 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:01:16,072 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 08:01:16,108 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 08:01:16,108 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 08:01:16,108 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 08:01:16,108 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 08:01:16,108 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-20 08:01:16,108 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:16,109 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 08:01:16,109 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 08:01:16,109 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-1.c_Iteration5_Loop [2020-10-20 08:01:16,109 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 08:01:16,109 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 08:01:16,111 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 08:01:16,113 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 08:01:16,116 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 08:01:16,118 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 08:01:16,125 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 08:01:16,159 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 08:01:16,159 INFO L404 LassoAnalysis]: Checking for nontermination... 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 08:01:16,161 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:01:16,162 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:01:16,164 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:01:16,164 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] 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) Waiting until toolchain timeout for monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:16,186 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:01:16,186 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:01:16,189 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:01:16,189 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret7=0} Honda state: {fibo_#t~ret7=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 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 34 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:16,212 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:01:16,212 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:01:16,215 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:01:16,215 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_~n=0} Honda state: {fibo_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 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 35 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:16,237 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:01:16,237 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:01:16,263 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-20 08:01:16,264 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:16,328 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-20 08:01:16,330 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 08:01:16,330 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 08:01:16,330 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 08:01:16,330 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 08:01:16,330 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-20 08:01:16,330 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:16,330 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 08:01:16,331 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 08:01:16,331 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-1.c_Iteration5_Loop [2020-10-20 08:01:16,331 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 08:01:16,331 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 08:01:16,332 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 08:01:16,335 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 08:01:16,336 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 08:01:16,338 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 08:01:16,340 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 08:01:16,388 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 08:01:16,388 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 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 37 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:16,392 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 08:01:16,393 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:16,393 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:16,393 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:16,393 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:16,393 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:16,394 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:16,394 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:16,398 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 38 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:01:16,435 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 08:01:16,437 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:16,437 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:16,437 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:16,438 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:16,438 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:16,438 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:16,438 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:16,445 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 39 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 39 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:16,467 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 08:01:16,468 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:16,468 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:16,468 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:16,468 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:16,468 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:16,469 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:16,469 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:16,471 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 40 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 40 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:16,493 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 08:01:16,495 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:16,495 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:16,495 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:16,495 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:16,495 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:16,496 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:16,496 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:16,497 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 41 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 41 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:16,518 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 08:01:16,519 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:16,520 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:16,520 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:16,520 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:16,520 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:16,520 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:16,520 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:16,522 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-20 08:01:16,525 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-20 08:01:16,525 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 42 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 42 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:16,527 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-20 08:01:16,527 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-20 08:01:16,528 INFO L510 LassoAnalysis]: Proved termination. [2020-10-20 08:01:16,528 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_#in~n) = 1*fibo_#in~n Supporting invariants [] [2020-10-20 08:01:16,547 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-20 08:01:16,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:16,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:16,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-20 08:01:16,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:16,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:16,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-20 08:01:16,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:16,661 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 08:01:16,662 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2020-10-20 08:01:16,662 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 456 states and 677 transitions. cyclomatic complexity: 231 Second operand 5 states. [2020-10-20 08:01:16,738 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 456 states and 677 transitions. cyclomatic complexity: 231. Second operand 5 states. Result 466 states and 687 transitions. Complement of second has 13 states. [2020-10-20 08:01:16,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2020-10-20 08:01:16,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-10-20 08:01:16,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 13 transitions. [2020-10-20 08:01:16,741 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 13 transitions. Stem has 29 letters. Loop has 4 letters. [2020-10-20 08:01:16,741 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:16,741 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-20 08:01:16,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:16,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:16,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-20 08:01:16,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:16,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:16,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-20 08:01:16,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:16,859 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 08:01:16,859 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 3 loop predicates [2020-10-20 08:01:16,859 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 456 states and 677 transitions. cyclomatic complexity: 231 Second operand 5 states. [2020-10-20 08:01:16,924 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 456 states and 677 transitions. cyclomatic complexity: 231. Second operand 5 states. Result 466 states and 687 transitions. Complement of second has 13 states. [2020-10-20 08:01:16,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2020-10-20 08:01:16,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-10-20 08:01:16,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 13 transitions. [2020-10-20 08:01:16,926 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 13 transitions. Stem has 29 letters. Loop has 4 letters. [2020-10-20 08:01:16,926 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:16,926 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-20 08:01:16,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:16,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:16,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-20 08:01:16,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:17,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:17,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-20 08:01:17,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:17,061 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 08:01:17,061 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 3 loop predicates [2020-10-20 08:01:17,062 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 456 states and 677 transitions. cyclomatic complexity: 231 Second operand 5 states. [2020-10-20 08:01:17,173 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 456 states and 677 transitions. cyclomatic complexity: 231. Second operand 5 states. Result 617 states and 861 transitions. Complement of second has 14 states. [2020-10-20 08:01:17,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2020-10-20 08:01:17,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-10-20 08:01:17,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 21 transitions. [2020-10-20 08:01:17,177 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 29 letters. Loop has 4 letters. [2020-10-20 08:01:17,179 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:17,183 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 33 letters. Loop has 4 letters. [2020-10-20 08:01:17,184 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:17,185 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 29 letters. Loop has 8 letters. [2020-10-20 08:01:17,185 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:17,187 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 617 states and 861 transitions. [2020-10-20 08:01:17,199 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-10-20 08:01:17,212 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 617 states to 520 states and 752 transitions. [2020-10-20 08:01:17,212 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 189 [2020-10-20 08:01:17,213 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 198 [2020-10-20 08:01:17,214 INFO L73 IsDeterministic]: Start isDeterministic. Operand 520 states and 752 transitions. [2020-10-20 08:01:17,214 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 08:01:17,214 INFO L691 BuchiCegarLoop]: Abstraction has 520 states and 752 transitions. [2020-10-20 08:01:17,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states and 752 transitions. [2020-10-20 08:01:17,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 490. [2020-10-20 08:01:17,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 490 states. [2020-10-20 08:01:17,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 716 transitions. [2020-10-20 08:01:17,239 INFO L714 BuchiCegarLoop]: Abstraction has 490 states and 716 transitions. [2020-10-20 08:01:17,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 08:01:17,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-20 08:01:17,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-10-20 08:01:17,241 INFO L87 Difference]: Start difference. First operand 490 states and 716 transitions. Second operand 12 states. [2020-10-20 08:01:17,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 08:01:17,437 INFO L93 Difference]: Finished difference Result 545 states and 810 transitions. [2020-10-20 08:01:17,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-20 08:01:17,438 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 545 states and 810 transitions. [2020-10-20 08:01:17,466 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-10-20 08:01:17,474 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 545 states to 542 states and 802 transitions. [2020-10-20 08:01:17,474 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 213 [2020-10-20 08:01:17,475 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 213 [2020-10-20 08:01:17,475 INFO L73 IsDeterministic]: Start isDeterministic. Operand 542 states and 802 transitions. [2020-10-20 08:01:17,476 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 08:01:17,476 INFO L691 BuchiCegarLoop]: Abstraction has 542 states and 802 transitions. [2020-10-20 08:01:17,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states and 802 transitions. [2020-10-20 08:01:17,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 511. [2020-10-20 08:01:17,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 511 states. [2020-10-20 08:01:17,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 756 transitions. [2020-10-20 08:01:17,496 INFO L714 BuchiCegarLoop]: Abstraction has 511 states and 756 transitions. [2020-10-20 08:01:17,496 INFO L594 BuchiCegarLoop]: Abstraction has 511 states and 756 transitions. [2020-10-20 08:01:17,497 INFO L427 BuchiCegarLoop]: ======== Iteration 6============ [2020-10-20 08:01:17,497 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 511 states and 756 transitions. [2020-10-20 08:01:17,501 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-10-20 08:01:17,501 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 08:01:17,501 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 08:01:17,502 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [8, 8, 7, 6, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 08:01:17,502 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-10-20 08:01:17,503 INFO L794 eck$LassoCheckResult]: Stem: 7334#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(11);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 7329#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 7; 7325#L27 call main_#t~ret9 := fibo(main_~x~0);< 7347#fiboENTRY ~n := #in~n; 7348#L8 assume !(~n < 1); 7391#L10 assume !(1 == ~n); 7383#L13 call #t~ret7 := fibo(~n - 1);< 7384#fiboENTRY ~n := #in~n; 7393#L8 assume !(~n < 1); 7392#L10 assume !(1 == ~n); 7376#L13 call #t~ret7 := fibo(~n - 1);< 7388#fiboENTRY ~n := #in~n; 7387#L8 assume !(~n < 1); 7386#L10 assume !(1 == ~n); 7380#L13 call #t~ret7 := fibo(~n - 1);< 7385#fiboENTRY ~n := #in~n; 7515#L8 assume !(~n < 1); 7426#L10 assume !(1 == ~n); 7379#L13 call #t~ret7 := fibo(~n - 1);< 7385#fiboENTRY ~n := #in~n; 7493#L8 assume !(~n < 1); 7491#L10 assume 1 == ~n;#res := 1; 7487#fiboFINAL assume true; 7463#fiboEXIT >#35#return; 7448#L13-1 call #t~ret8 := fibo(~n - 2);< 7451#fiboENTRY ~n := #in~n; 7744#L8 assume !(~n < 1); 7741#L10 assume !(1 == ~n); 7351#L13 call #t~ret7 := fibo(~n - 1);< 7358#fiboENTRY ~n := #in~n; 7359#L8 assume !(~n < 1); 7794#L10 assume !(1 == ~n); 7363#L13 call #t~ret7 := fibo(~n - 1);< 7360#fiboENTRY ~n := #in~n; 7365#L8 assume !(~n < 1); 7374#L10 assume !(1 == ~n); 7362#L13 [2020-10-20 08:01:17,503 INFO L796 eck$LassoCheckResult]: Loop: 7362#L13 call #t~ret7 := fibo(~n - 1);< 7360#fiboENTRY ~n := #in~n; 7365#L8 assume !(~n < 1); 7374#L10 assume !(1 == ~n); 7362#L13 [2020-10-20 08:01:17,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:17,504 INFO L82 PathProgramCache]: Analyzing trace with hash 42869646, now seen corresponding path program 2 times [2020-10-20 08:01:17,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:01:17,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432065933] [2020-10-20 08:01:17,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:01:17,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:17,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-20 08:01:17,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:17,626 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 53 proven. 36 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-20 08:01:17,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432065933] [2020-10-20 08:01:17,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635777915] [2020-10-20 08:01:17,627 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 08:01:17,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-20 08:01:17,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 08:01:17,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-20 08:01:17,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:17,702 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 53 proven. 36 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-20 08:01:17,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 08:01:17,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-20 08:01:17,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487970979] [2020-10-20 08:01:17,703 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-20 08:01:17,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:17,703 INFO L82 PathProgramCache]: Analyzing trace with hash 1955414, now seen corresponding path program 3 times [2020-10-20 08:01:17,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:01:17,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860606883] [2020-10-20 08:01:17,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:01:17,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:01:17,706 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:01:17,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:01:17,708 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:01:17,709 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 08:01:17,752 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 08:01:17,752 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 08:01:17,752 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 08:01:17,752 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 08:01:17,753 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-20 08:01:17,753 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:17,753 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 08:01:17,753 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 08:01:17,753 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-1.c_Iteration6_Loop [2020-10-20 08:01:17,753 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 08:01:17,753 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 08:01:17,754 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 08:01:17,756 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 08:01:17,759 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 08:01:17,767 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 08:01:17,831 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 08:01:17,831 INFO L404 LassoAnalysis]: Checking for nontermination... 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) Waiting until toolchain timeout for monitored process 44 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:17,838 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:01:17,838 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:01:17,840 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:01:17,840 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret8=0} Honda state: {fibo_#t~ret8=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] 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) Waiting until toolchain timeout for monitored process 45 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:17,863 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:01:17,863 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:01:17,865 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:01:17,866 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] 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) Waiting until toolchain timeout for monitored process 46 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:17,886 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:01:17,886 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 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 47 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:17,911 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-20 08:01:17,911 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:01:24,776 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-20 08:01:24,779 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 08:01:24,779 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 08:01:24,779 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 08:01:24,780 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 08:01:24,780 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-20 08:01:24,780 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:24,780 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 08:01:24,780 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 08:01:24,780 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-1.c_Iteration6_Loop [2020-10-20 08:01:24,780 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 08:01:24,780 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 08:01:24,781 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 08:01:24,784 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 08:01:24,786 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 08:01:24,795 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 08:01:24,846 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 08:01:24,846 INFO L489 LassoAnalysis]: Using template 'affine'. 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 08:01:24,850 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 08:01:24,851 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:24,851 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:24,851 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:24,852 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:24,852 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:24,852 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:24,852 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:24,853 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 49 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 49 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:24,874 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 08:01:24,875 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:24,875 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:24,876 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:24,876 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:24,876 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:24,876 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:24,876 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:24,877 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 50 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 50 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:24,900 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 08:01:24,901 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:24,902 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:24,902 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:24,902 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:24,902 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:24,903 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:24,903 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:24,905 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-20 08:01:24,908 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2020-10-20 08:01:24,908 INFO L444 ModelExtractionUtils]: 2 out of 4 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 51 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:01:24,911 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-20 08:01:24,911 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-20 08:01:24,911 INFO L510 LassoAnalysis]: Proved termination. [2020-10-20 08:01:24,911 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] Waiting until toolchain timeout for monitored process 51 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:24,933 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-20 08:01:24,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:24,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:24,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-20 08:01:24,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:25,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:25,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-20 08:01:25,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:25,072 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 08:01:25,073 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 4 loop predicates [2020-10-20 08:01:25,073 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 511 states and 756 transitions. cyclomatic complexity: 255 Second operand 6 states. [2020-10-20 08:01:25,163 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 511 states and 756 transitions. cyclomatic complexity: 255. Second operand 6 states. Result 523 states and 769 transitions. Complement of second has 18 states. [2020-10-20 08:01:25,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2020-10-20 08:01:25,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-20 08:01:25,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 13 transitions. [2020-10-20 08:01:25,165 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 13 transitions. Stem has 36 letters. Loop has 4 letters. [2020-10-20 08:01:25,165 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:25,165 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-20 08:01:25,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:25,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:25,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-20 08:01:25,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:25,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:25,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-20 08:01:25,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:25,288 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 08:01:25,289 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 4 loop predicates [2020-10-20 08:01:25,289 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 511 states and 756 transitions. cyclomatic complexity: 255 Second operand 6 states. [2020-10-20 08:01:25,391 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 511 states and 756 transitions. cyclomatic complexity: 255. Second operand 6 states. Result 753 states and 1085 transitions. Complement of second has 22 states. [2020-10-20 08:01:25,392 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 08:01:25,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-20 08:01:25,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 16 transitions. [2020-10-20 08:01:25,393 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 36 letters. Loop has 4 letters. [2020-10-20 08:01:25,393 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:25,393 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 40 letters. Loop has 4 letters. [2020-10-20 08:01:25,395 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:25,395 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 36 letters. Loop has 8 letters. [2020-10-20 08:01:25,395 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:25,396 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 753 states and 1085 transitions. [2020-10-20 08:01:25,430 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-10-20 08:01:25,443 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 753 states to 689 states and 1016 transitions. [2020-10-20 08:01:25,444 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 233 [2020-10-20 08:01:25,445 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 261 [2020-10-20 08:01:25,445 INFO L73 IsDeterministic]: Start isDeterministic. Operand 689 states and 1016 transitions. [2020-10-20 08:01:25,445 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 08:01:25,445 INFO L691 BuchiCegarLoop]: Abstraction has 689 states and 1016 transitions. [2020-10-20 08:01:25,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 689 states and 1016 transitions. [2020-10-20 08:01:25,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 689 to 672. [2020-10-20 08:01:25,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 672 states. [2020-10-20 08:01:25,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 672 states to 672 states and 991 transitions. [2020-10-20 08:01:25,476 INFO L714 BuchiCegarLoop]: Abstraction has 672 states and 991 transitions. [2020-10-20 08:01:25,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 08:01:25,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-20 08:01:25,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-10-20 08:01:25,477 INFO L87 Difference]: Start difference. First operand 672 states and 991 transitions. Second operand 14 states. [2020-10-20 08:01:25,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 08:01:25,716 INFO L93 Difference]: Finished difference Result 735 states and 1085 transitions. [2020-10-20 08:01:25,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-20 08:01:25,717 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 735 states and 1085 transitions. [2020-10-20 08:01:25,728 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-10-20 08:01:25,739 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 735 states to 725 states and 1070 transitions. [2020-10-20 08:01:25,739 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 268 [2020-10-20 08:01:25,740 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 268 [2020-10-20 08:01:25,740 INFO L73 IsDeterministic]: Start isDeterministic. Operand 725 states and 1070 transitions. [2020-10-20 08:01:25,740 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 08:01:25,740 INFO L691 BuchiCegarLoop]: Abstraction has 725 states and 1070 transitions. [2020-10-20 08:01:25,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 725 states and 1070 transitions. [2020-10-20 08:01:25,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 725 to 712. [2020-10-20 08:01:25,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 712 states. [2020-10-20 08:01:25,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 1045 transitions. [2020-10-20 08:01:25,766 INFO L714 BuchiCegarLoop]: Abstraction has 712 states and 1045 transitions. [2020-10-20 08:01:25,766 INFO L594 BuchiCegarLoop]: Abstraction has 712 states and 1045 transitions. [2020-10-20 08:01:25,766 INFO L427 BuchiCegarLoop]: ======== Iteration 7============ [2020-10-20 08:01:25,766 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 712 states and 1045 transitions. [2020-10-20 08:01:25,772 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-10-20 08:01:25,772 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 08:01:25,772 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 08:01:25,773 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [10, 9, 8, 7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 08:01:25,773 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-10-20 08:01:25,774 INFO L794 eck$LassoCheckResult]: Stem: 10978#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(11);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 10969#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 7; 10970#L27 call main_#t~ret9 := fibo(main_~x~0);< 10986#fiboENTRY ~n := #in~n; 11071#L8 assume !(~n < 1); 11069#L10 assume !(1 == ~n); 11066#L13 call #t~ret7 := fibo(~n - 1);< 11067#fiboENTRY ~n := #in~n; 11101#L8 assume !(~n < 1); 11100#L10 assume !(1 == ~n); 11078#L13 call #t~ret7 := fibo(~n - 1);< 11081#fiboENTRY ~n := #in~n; 11099#L8 assume !(~n < 1); 11083#L10 assume !(1 == ~n); 11073#L13 call #t~ret7 := fibo(~n - 1);< 11079#fiboENTRY ~n := #in~n; 11110#L8 assume !(~n < 1); 11109#L10 assume !(1 == ~n); 11095#L13 call #t~ret7 := fibo(~n - 1);< 11108#fiboENTRY ~n := #in~n; 11141#L8 assume !(~n < 1); 11130#L10 assume !(1 == ~n); 11096#L13 call #t~ret7 := fibo(~n - 1);< 11129#fiboENTRY ~n := #in~n; 11174#L8 assume !(~n < 1); 11161#L10 assume 1 == ~n;#res := 1; 11158#fiboFINAL assume true; 11156#fiboEXIT >#35#return; 11136#L13-1 call #t~ret8 := fibo(~n - 2);< 11138#fiboENTRY ~n := #in~n; 11152#L8 assume ~n < 1;#res := 0; 11149#fiboFINAL assume true; 11135#fiboEXIT >#37#return; 11134#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 11128#fiboFINAL assume true; 11107#fiboEXIT >#35#return; 11091#L13-1 call #t~ret8 := fibo(~n - 2);< 11098#fiboENTRY ~n := #in~n; 11159#L8 assume !(~n < 1); 11120#L10 assume !(1 == ~n); 11122#L13 call #t~ret7 := fibo(~n - 1);< 11148#fiboENTRY ~n := #in~n; 11320#L8 assume !(~n < 1); 11318#L10 assume !(1 == ~n); 11304#L13 call #t~ret7 := fibo(~n - 1);< 11314#fiboENTRY ~n := #in~n; 11397#L8 assume !(~n < 1); 11396#L10 assume !(1 == ~n); 11305#L13 [2020-10-20 08:01:25,774 INFO L796 eck$LassoCheckResult]: Loop: 11305#L13 call #t~ret7 := fibo(~n - 1);< 11314#fiboENTRY ~n := #in~n; 11397#L8 assume !(~n < 1); 11396#L10 assume !(1 == ~n); 11305#L13 [2020-10-20 08:01:25,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:25,774 INFO L82 PathProgramCache]: Analyzing trace with hash -1891219752, now seen corresponding path program 2 times [2020-10-20 08:01:25,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:01:25,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885636066] [2020-10-20 08:01:25,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:01:25,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:25,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-20 08:01:25,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:25,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 08:01:25,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:25,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-20 08:01:25,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:25,913 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 73 proven. 66 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-20 08:01:25,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885636066] [2020-10-20 08:01:25,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209833120] [2020-10-20 08:01:25,914 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 08:01:25,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-20 08:01:25,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 08:01:25,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-20 08:01:25,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:25,982 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 73 proven. 66 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-20 08:01:25,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 08:01:25,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-20 08:01:25,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866754300] [2020-10-20 08:01:25,983 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-20 08:01:25,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:25,984 INFO L82 PathProgramCache]: Analyzing trace with hash 1955414, now seen corresponding path program 4 times [2020-10-20 08:01:25,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:01:25,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181277987] [2020-10-20 08:01:25,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:01:25,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:01:25,986 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:01:25,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:01:25,987 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:01:25,988 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 08:01:26,025 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 08:01:26,026 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 08:01:26,026 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 08:01:26,026 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 08:01:26,026 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-20 08:01:26,026 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:26,026 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 08:01:26,026 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 08:01:26,026 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-1.c_Iteration7_Loop [2020-10-20 08:01:26,026 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 08:01:26,027 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 08:01:26,027 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 08:01:26,036 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 08:01:26,038 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 08:01:26,040 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 08:01:26,079 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 08:01:26,079 INFO L404 LassoAnalysis]: Checking for nontermination... 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) Waiting until toolchain timeout for monitored process 53 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:26,082 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:01:26,082 INFO L160 nArgumentSynthesizer]: Using integer mode. 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 08:01:26,118 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-20 08:01:26,119 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:01:27,458 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-20 08:01:27,460 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 08:01:27,460 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 08:01:27,460 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 08:01:27,460 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 08:01:27,460 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-20 08:01:27,460 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:27,460 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 08:01:27,460 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 08:01:27,461 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-1.c_Iteration7_Loop [2020-10-20 08:01:27,461 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 08:01:27,461 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 08:01:27,461 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 08:01:27,463 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 08:01:27,465 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 08:01:27,467 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 08:01:27,517 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 08:01:27,517 INFO L489 LassoAnalysis]: Using template 'affine'. 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) Waiting until toolchain timeout for monitored process 55 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:27,520 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 08:01:27,521 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:27,521 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:27,522 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:27,522 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:27,522 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:27,522 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:27,523 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:27,524 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 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 08:01:27,546 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 08:01:27,547 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:27,547 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:27,547 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:27,547 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:27,547 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:27,548 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:27,548 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:27,549 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 08:01:27,573 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 08:01:27,574 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:27,574 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:27,574 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:27,574 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:27,574 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:27,576 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:27,576 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:27,577 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 08:01:27,599 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 08:01:27,600 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:27,600 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:27,600 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:27,601 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:27,601 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:27,602 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:27,602 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:27,605 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-20 08:01:27,607 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2020-10-20 08:01:27,607 INFO L444 ModelExtractionUtils]: 2 out of 4 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 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 08:01:27,610 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-20 08:01:27,610 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-20 08:01:27,610 INFO L510 LassoAnalysis]: Proved termination. [2020-10-20 08:01:27,611 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2020-10-20 08:01:27,634 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-20 08:01:27,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:27,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:27,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-20 08:01:27,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:27,735 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:27,743 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:27,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:27,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-20 08:01:27,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:27,792 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 08:01:27,793 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 4 loop predicates [2020-10-20 08:01:27,793 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 712 states and 1045 transitions. cyclomatic complexity: 346 Second operand 6 states. [2020-10-20 08:01:27,866 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 712 states and 1045 transitions. cyclomatic complexity: 346. Second operand 6 states. Result 731 states and 1065 transitions. Complement of second has 18 states. [2020-10-20 08:01:27,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2020-10-20 08:01:27,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-20 08:01:27,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 13 transitions. [2020-10-20 08:01:27,868 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 13 transitions. Stem has 48 letters. Loop has 4 letters. [2020-10-20 08:01:27,868 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:27,868 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-20 08:01:27,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:27,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:27,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-20 08:01:27,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:27,981 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:27,984 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:27,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:27,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-20 08:01:27,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:28,042 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 08:01:28,042 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 4 loop predicates [2020-10-20 08:01:28,043 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 712 states and 1045 transitions. cyclomatic complexity: 346 Second operand 6 states. [2020-10-20 08:01:28,161 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 712 states and 1045 transitions. cyclomatic complexity: 346. Second operand 6 states. Result 916 states and 1284 transitions. Complement of second has 22 states. [2020-10-20 08:01:28,162 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 08:01:28,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-20 08:01:28,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 16 transitions. [2020-10-20 08:01:28,164 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 48 letters. Loop has 4 letters. [2020-10-20 08:01:28,164 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:28,164 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-20 08:01:28,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:28,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:28,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-20 08:01:28,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:28,284 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:28,287 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:28,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:28,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-20 08:01:28,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:28,356 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 08:01:28,357 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 4 loop predicates [2020-10-20 08:01:28,357 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 712 states and 1045 transitions. cyclomatic complexity: 346 Second operand 6 states. [2020-10-20 08:01:28,430 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 712 states and 1045 transitions. cyclomatic complexity: 346. Second operand 6 states. Result 959 states and 1365 transitions. Complement of second has 27 states. [2020-10-20 08:01:28,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2020-10-20 08:01:28,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-20 08:01:28,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 22 transitions. [2020-10-20 08:01:28,432 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 48 letters. Loop has 4 letters. [2020-10-20 08:01:28,433 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:28,433 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 52 letters. Loop has 4 letters. [2020-10-20 08:01:28,433 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:28,434 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 48 letters. Loop has 8 letters. [2020-10-20 08:01:28,435 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:28,435 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 959 states and 1365 transitions. [2020-10-20 08:01:28,449 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-10-20 08:01:28,460 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 959 states to 712 states and 1045 transitions. [2020-10-20 08:01:28,460 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 216 [2020-10-20 08:01:28,462 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 252 [2020-10-20 08:01:28,462 INFO L73 IsDeterministic]: Start isDeterministic. Operand 712 states and 1045 transitions. [2020-10-20 08:01:28,462 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 08:01:28,463 INFO L691 BuchiCegarLoop]: Abstraction has 712 states and 1045 transitions. [2020-10-20 08:01:28,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 712 states and 1045 transitions. [2020-10-20 08:01:28,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 712 to 712. [2020-10-20 08:01:28,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 712 states. [2020-10-20 08:01:28,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 1045 transitions. [2020-10-20 08:01:28,495 INFO L714 BuchiCegarLoop]: Abstraction has 712 states and 1045 transitions. [2020-10-20 08:01:28,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 08:01:28,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-20 08:01:28,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-10-20 08:01:28,496 INFO L87 Difference]: Start difference. First operand 712 states and 1045 transitions. Second operand 15 states. [2020-10-20 08:01:28,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 08:01:28,831 INFO L93 Difference]: Finished difference Result 777 states and 1133 transitions. [2020-10-20 08:01:28,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-20 08:01:28,832 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 777 states and 1133 transitions. [2020-10-20 08:01:28,841 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-10-20 08:01:28,851 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 777 states to 777 states and 1133 transitions. [2020-10-20 08:01:28,852 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 291 [2020-10-20 08:01:28,853 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 291 [2020-10-20 08:01:28,853 INFO L73 IsDeterministic]: Start isDeterministic. Operand 777 states and 1133 transitions. [2020-10-20 08:01:28,854 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 08:01:28,854 INFO L691 BuchiCegarLoop]: Abstraction has 777 states and 1133 transitions. [2020-10-20 08:01:28,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 777 states and 1133 transitions. [2020-10-20 08:01:28,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 777 to 734. [2020-10-20 08:01:28,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 734 states. [2020-10-20 08:01:28,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 1083 transitions. [2020-10-20 08:01:28,881 INFO L714 BuchiCegarLoop]: Abstraction has 734 states and 1083 transitions. [2020-10-20 08:01:28,881 INFO L594 BuchiCegarLoop]: Abstraction has 734 states and 1083 transitions. [2020-10-20 08:01:28,881 INFO L427 BuchiCegarLoop]: ======== Iteration 8============ [2020-10-20 08:01:28,881 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 734 states and 1083 transitions. [2020-10-20 08:01:28,887 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-10-20 08:01:28,887 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 08:01:28,887 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 08:01:28,892 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [13, 12, 10, 9, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2020-10-20 08:01:28,892 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-10-20 08:01:28,893 INFO L794 eck$LassoCheckResult]: Stem: 16564#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(11);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 16555#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 7; 16556#L27 call main_#t~ret9 := fibo(main_~x~0);< 16583#fiboENTRY ~n := #in~n; 16648#L8 assume !(~n < 1); 16647#L10 assume !(1 == ~n); 16643#L13 call #t~ret7 := fibo(~n - 1);< 16646#fiboENTRY ~n := #in~n; 16645#L8 assume !(~n < 1); 16644#L10 assume !(1 == ~n); 16639#L13 call #t~ret7 := fibo(~n - 1);< 16642#fiboENTRY ~n := #in~n; 16641#L8 assume !(~n < 1); 16640#L10 assume !(1 == ~n); 16632#L13 call #t~ret7 := fibo(~n - 1);< 16638#fiboENTRY ~n := #in~n; 16636#L8 assume !(~n < 1); 16634#L10 assume !(1 == ~n); 16620#L13 call #t~ret7 := fibo(~n - 1);< 16625#fiboENTRY ~n := #in~n; 16630#L8 assume !(~n < 1); 16628#L10 assume !(1 == ~n); 16619#L13 call #t~ret7 := fibo(~n - 1);< 16625#fiboENTRY ~n := #in~n; 16631#L8 assume !(~n < 1); 16629#L10 assume 1 == ~n;#res := 1; 16626#fiboFINAL assume true; 16618#fiboEXIT >#35#return; 16611#L13-1 call #t~ret8 := fibo(~n - 2);< 16857#fiboENTRY ~n := #in~n; 16929#L8 assume !(~n < 1); 16610#L10 assume !(1 == ~n); 16612#L13 call #t~ret7 := fibo(~n - 1);< 16622#fiboENTRY ~n := #in~n; 16637#L8 assume !(~n < 1); 17175#L10 assume !(1 == ~n); 16571#L13 call #t~ret7 := fibo(~n - 1);< 17203#fiboENTRY ~n := #in~n; 17227#L8 assume !(~n < 1); 17224#L10 assume 1 == ~n;#res := 1; 17222#fiboFINAL assume true; 17202#fiboEXIT >#35#return; 16661#L13-1 call #t~ret8 := fibo(~n - 2);< 16662#fiboENTRY ~n := #in~n; 17206#L8 assume ~n < 1;#res := 0; 17205#fiboFINAL assume true; 17200#fiboEXIT >#37#return; 16660#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 16913#fiboFINAL assume true; 16892#fiboEXIT >#35#return; 16856#L13-1 call #t~ret8 := fibo(~n - 2);< 16889#fiboENTRY ~n := #in~n; 16971#L8 assume !(~n < 1); 16896#L10 assume !(1 == ~n); 16898#L13 call #t~ret7 := fibo(~n - 1);< 16925#fiboENTRY ~n := #in~n; 16975#L8 assume !(~n < 1); 17005#L10 assume !(1 == ~n); 16961#L13 call #t~ret7 := fibo(~n - 1);< 16964#fiboENTRY ~n := #in~n; 16989#L8 assume !(~n < 1); 16992#L10 assume !(1 == ~n); 16962#L13 [2020-10-20 08:01:28,893 INFO L796 eck$LassoCheckResult]: Loop: 16962#L13 call #t~ret7 := fibo(~n - 1);< 16964#fiboENTRY ~n := #in~n; 16989#L8 assume !(~n < 1); 16992#L10 assume !(1 == ~n); 16962#L13 [2020-10-20 08:01:28,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:28,894 INFO L82 PathProgramCache]: Analyzing trace with hash 167551224, now seen corresponding path program 3 times [2020-10-20 08:01:28,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:01:28,894 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752752025] [2020-10-20 08:01:28,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:01:28,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:29,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-20 08:01:29,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:29,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-10-20 08:01:29,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:29,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 08:01:29,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:29,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-20 08:01:29,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:29,065 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 114 proven. 121 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-10-20 08:01:29,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752752025] [2020-10-20 08:01:29,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278232518] [2020-10-20 08:01:29,066 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 08:01:29,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-20 08:01:29,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 08:01:29,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-20 08:01:29,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:29,271 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 141 proven. 19 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2020-10-20 08:01:29,272 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 08:01:29,272 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2020-10-20 08:01:29,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122711595] [2020-10-20 08:01:29,278 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-20 08:01:29,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:29,278 INFO L82 PathProgramCache]: Analyzing trace with hash 1955414, now seen corresponding path program 5 times [2020-10-20 08:01:29,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:01:29,279 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887898629] [2020-10-20 08:01:29,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:01:29,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:01:29,281 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:01:29,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:01:29,285 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:01:29,287 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 08:01:29,332 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 08:01:29,332 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 08:01:29,332 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 08:01:29,332 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 08:01:29,332 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-20 08:01:29,333 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:29,333 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 08:01:29,333 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 08:01:29,333 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-1.c_Iteration8_Loop [2020-10-20 08:01:29,333 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 08:01:29,333 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 08:01:29,334 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 08:01:29,336 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 08:01:29,340 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 08:01:29,349 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 08:01:29,414 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 08:01:29,415 INFO L404 LassoAnalysis]: Checking for nontermination... 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 08:01:29,422 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:01:29,423 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:01:29,425 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:01:29,425 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret7=0} Honda state: {fibo_#t~ret7=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] 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 08:01:29,448 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:01:29,449 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:01:29,451 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:01:29,451 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] 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) [2020-10-20 08:01:29,474 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:01:29,474 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 63 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 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 08:01:29,501 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-20 08:01:29,501 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:01:30,829 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-20 08:01:30,830 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 08:01:30,830 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 08:01:30,831 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 08:01:30,831 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 08:01:30,831 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-20 08:01:30,831 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:30,831 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 08:01:30,831 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 08:01:30,831 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-1.c_Iteration8_Loop [2020-10-20 08:01:30,831 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 08:01:30,831 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 08:01:30,832 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 08:01:30,835 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 08:01:30,837 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 08:01:30,843 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 08:01:30,903 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 08:01:30,903 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 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 65 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:30,906 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 08:01:30,907 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:30,907 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:30,908 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:30,908 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:30,908 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:30,909 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:30,909 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:30,910 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 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 08:01:30,933 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 08:01:30,934 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:30,934 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:30,934 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:30,935 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:30,935 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:30,935 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:30,935 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:30,936 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 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 08:01:30,960 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 08:01:30,961 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:30,961 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:30,961 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:30,962 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:30,962 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:30,962 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:30,963 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:30,965 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-20 08:01:30,967 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2020-10-20 08:01:30,967 INFO L444 ModelExtractionUtils]: 2 out of 4 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 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 08:01:30,969 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-20 08:01:30,969 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-20 08:01:30,969 INFO L510 LassoAnalysis]: Proved termination. [2020-10-20 08:01:30,969 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2020-10-20 08:01:30,990 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-20 08:01:31,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:31,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:31,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-20 08:01:31,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:31,114 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:31,119 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:31,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:31,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-20 08:01:31,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:31,162 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 08:01:31,163 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 4 loop predicates [2020-10-20 08:01:31,163 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 734 states and 1083 transitions. cyclomatic complexity: 362 Second operand 6 states. [2020-10-20 08:01:31,222 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 734 states and 1083 transitions. cyclomatic complexity: 362. Second operand 6 states. Result 753 states and 1103 transitions. Complement of second has 18 states. [2020-10-20 08:01:31,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2020-10-20 08:01:31,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-20 08:01:31,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 13 transitions. [2020-10-20 08:01:31,223 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 13 transitions. Stem has 62 letters. Loop has 4 letters. [2020-10-20 08:01:31,224 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:31,224 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-20 08:01:31,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:31,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:31,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-20 08:01:31,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:31,320 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:31,325 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:31,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:31,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-20 08:01:31,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:31,366 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 08:01:31,367 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 4 loop predicates [2020-10-20 08:01:31,367 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 734 states and 1083 transitions. cyclomatic complexity: 362 Second operand 6 states. [2020-10-20 08:01:31,491 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 734 states and 1083 transitions. cyclomatic complexity: 362. Second operand 6 states. Result 938 states and 1322 transitions. Complement of second has 22 states. [2020-10-20 08:01:31,492 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 08:01:31,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-20 08:01:31,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 16 transitions. [2020-10-20 08:01:31,493 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 62 letters. Loop has 4 letters. [2020-10-20 08:01:31,493 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:31,493 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-20 08:01:31,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:31,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:31,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-20 08:01:31,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:31,592 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:31,595 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:31,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:31,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-20 08:01:31,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:31,638 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 08:01:31,638 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 4 loop predicates [2020-10-20 08:01:31,639 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 734 states and 1083 transitions. cyclomatic complexity: 362 Second operand 6 states. [2020-10-20 08:01:31,720 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 734 states and 1083 transitions. cyclomatic complexity: 362. Second operand 6 states. Result 981 states and 1403 transitions. Complement of second has 27 states. [2020-10-20 08:01:31,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2020-10-20 08:01:31,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-20 08:01:31,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 22 transitions. [2020-10-20 08:01:31,723 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 62 letters. Loop has 4 letters. [2020-10-20 08:01:31,724 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:31,724 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 66 letters. Loop has 4 letters. [2020-10-20 08:01:31,727 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:31,727 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 62 letters. Loop has 8 letters. [2020-10-20 08:01:31,728 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:31,728 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 981 states and 1403 transitions. [2020-10-20 08:01:31,738 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-10-20 08:01:31,748 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 981 states to 734 states and 1083 transitions. [2020-10-20 08:01:31,748 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 229 [2020-10-20 08:01:31,749 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 265 [2020-10-20 08:01:31,749 INFO L73 IsDeterministic]: Start isDeterministic. Operand 734 states and 1083 transitions. [2020-10-20 08:01:31,749 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 08:01:31,749 INFO L691 BuchiCegarLoop]: Abstraction has 734 states and 1083 transitions. [2020-10-20 08:01:31,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 734 states and 1083 transitions. [2020-10-20 08:01:31,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 734 to 734. [2020-10-20 08:01:31,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 734 states. [2020-10-20 08:01:31,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 1083 transitions. [2020-10-20 08:01:31,775 INFO L714 BuchiCegarLoop]: Abstraction has 734 states and 1083 transitions. [2020-10-20 08:01:31,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 08:01:31,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-20 08:01:31,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2020-10-20 08:01:31,776 INFO L87 Difference]: Start difference. First operand 734 states and 1083 transitions. Second operand 23 states. [2020-10-20 08:01:32,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 08:01:32,334 INFO L93 Difference]: Finished difference Result 483 states and 671 transitions. [2020-10-20 08:01:32,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-20 08:01:32,334 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 483 states and 671 transitions. [2020-10-20 08:01:32,341 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2020-10-20 08:01:32,373 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 483 states to 402 states and 569 transitions. [2020-10-20 08:01:32,374 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 174 [2020-10-20 08:01:32,374 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 194 [2020-10-20 08:01:32,374 INFO L73 IsDeterministic]: Start isDeterministic. Operand 402 states and 569 transitions. [2020-10-20 08:01:32,374 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 08:01:32,374 INFO L691 BuchiCegarLoop]: Abstraction has 402 states and 569 transitions. [2020-10-20 08:01:32,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states and 569 transitions. [2020-10-20 08:01:32,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 319. [2020-10-20 08:01:32,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 319 states. [2020-10-20 08:01:32,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 440 transitions. [2020-10-20 08:01:32,389 INFO L714 BuchiCegarLoop]: Abstraction has 319 states and 440 transitions. [2020-10-20 08:01:32,389 INFO L594 BuchiCegarLoop]: Abstraction has 319 states and 440 transitions. [2020-10-20 08:01:32,389 INFO L427 BuchiCegarLoop]: ======== Iteration 9============ [2020-10-20 08:01:32,389 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 319 states and 440 transitions. [2020-10-20 08:01:32,391 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2020-10-20 08:01:32,392 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 08:01:32,392 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 08:01:32,393 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [12, 11, 9, 8, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1] [2020-10-20 08:01:32,393 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-10-20 08:01:32,394 INFO L794 eck$LassoCheckResult]: Stem: 22139#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(11);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 22122#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 7; 22123#L27 call main_#t~ret9 := fibo(main_~x~0);< 22147#fiboENTRY ~n := #in~n; 22239#L8 assume !(~n < 1); 22236#L10 assume !(1 == ~n); 22229#L13 call #t~ret7 := fibo(~n - 1);< 22231#fiboENTRY ~n := #in~n; 22242#L8 assume !(~n < 1); 22238#L10 assume !(1 == ~n); 22233#L13 call #t~ret7 := fibo(~n - 1);< 22234#fiboENTRY ~n := #in~n; 22253#L8 assume !(~n < 1); 22251#L10 assume !(1 == ~n); 22248#L13 call #t~ret7 := fibo(~n - 1);< 22249#fiboENTRY ~n := #in~n; 22277#L8 assume !(~n < 1); 22271#L10 assume !(1 == ~n); 22244#L13 call #t~ret7 := fibo(~n - 1);< 22269#fiboENTRY ~n := #in~n; 22319#L8 assume !(~n < 1); 22318#L10 assume !(1 == ~n); 22260#L13 call #t~ret7 := fibo(~n - 1);< 22281#fiboENTRY ~n := #in~n; 22307#L8 assume !(~n < 1); 22306#L10 assume !(1 == ~n); 22264#L13 call #t~ret7 := fibo(~n - 1);< 22305#fiboENTRY ~n := #in~n; 22378#L8 assume !(~n < 1); 22377#L10 assume 1 == ~n;#res := 1; 22376#fiboFINAL assume true; 22373#fiboEXIT >#35#return; 22370#L13-1 call #t~ret8 := fibo(~n - 2);< 22372#fiboENTRY ~n := #in~n; 22380#L8 assume ~n < 1;#res := 0; 22379#fiboFINAL assume true; 22369#fiboEXIT >#37#return; 22368#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 22365#fiboFINAL assume true; 22308#fiboEXIT >#35#return; 22297#L13-1 call #t~ret8 := fibo(~n - 2);< 22301#fiboENTRY ~n := #in~n; 22316#L8 assume !(~n < 1); 22314#L10 assume 1 == ~n;#res := 1; 22303#fiboFINAL assume true; 22296#fiboEXIT >#37#return; 22258#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 22282#fiboFINAL assume true; 22243#fiboEXIT >#35#return; 22245#L13-1 call #t~ret8 := fibo(~n - 2);< 22266#fiboENTRY ~n := #in~n; 22315#L8 assume !(~n < 1); 22313#L10 assume !(1 == ~n); 22149#L13 call #t~ret7 := fibo(~n - 1);< 22142#fiboENTRY ~n := #in~n; 22285#L8 assume !(~n < 1); 22286#L10 assume !(1 == ~n); 22188#L13 call #t~ret7 := fibo(~n - 1);< 22189#fiboENTRY ~n := #in~n; 22388#L8 assume !(~n < 1); 22387#L10 assume !(1 == ~n); 22208#L13 [2020-10-20 08:01:32,395 INFO L796 eck$LassoCheckResult]: Loop: 22208#L13 call #t~ret7 := fibo(~n - 1);< 22189#fiboENTRY ~n := #in~n; 22388#L8 assume !(~n < 1); 22387#L10 assume !(1 == ~n); 22208#L13 [2020-10-20 08:01:32,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:32,396 INFO L82 PathProgramCache]: Analyzing trace with hash -686810473, now seen corresponding path program 4 times [2020-10-20 08:01:32,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:01:32,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895830252] [2020-10-20 08:01:32,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:01:32,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:32,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-20 08:01:32,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:32,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 08:01:32,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:32,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 08:01:32,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:32,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-20 08:01:32,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:32,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-20 08:01:32,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:32,559 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 126 proven. 64 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-20 08:01:32,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895830252] [2020-10-20 08:01:32,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344273326] [2020-10-20 08:01:32,560 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 08:01:32,598 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-20 08:01:32,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 08:01:32,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-20 08:01:32,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:32,654 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 126 proven. 64 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-20 08:01:32,654 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 08:01:32,654 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 18 [2020-10-20 08:01:32,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202702331] [2020-10-20 08:01:32,655 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-20 08:01:32,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:32,655 INFO L82 PathProgramCache]: Analyzing trace with hash 1955414, now seen corresponding path program 6 times [2020-10-20 08:01:32,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:01:32,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373188563] [2020-10-20 08:01:32,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:01:32,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:01:32,658 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:01:32,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:01:32,659 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:01:32,660 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 08:01:32,702 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 08:01:32,702 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 08:01:32,703 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 08:01:32,703 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 08:01:32,703 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-20 08:01:32,703 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:32,703 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 08:01:32,703 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 08:01:32,703 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-1.c_Iteration9_Loop [2020-10-20 08:01:32,703 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 08:01:32,703 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 08:01:32,704 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 08:01:32,707 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 08:01:32,709 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 08:01:32,710 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 08:01:32,788 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 08:01:32,788 INFO L404 LassoAnalysis]: Checking for nontermination... 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 08:01:32,793 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:01:32,793 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:01:32,796 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:01:32,796 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret8=0} Honda state: {fibo_#t~ret8=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 08:01:32,820 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:01:32,820 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:01:32,822 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:01:32,822 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] 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 08:01:32,844 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:01:32,844 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:01:32,846 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:01:32,846 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret7=0} Honda state: {fibo_#t~ret7=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] 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) [2020-10-20 08:01:32,879 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:01:32,880 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 73 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 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 08:01:32,906 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-20 08:01:32,906 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:01:39,637 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-20 08:01:39,639 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 08:01:39,639 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 08:01:39,639 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 08:01:39,639 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 08:01:39,639 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-20 08:01:39,639 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:39,639 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 08:01:39,640 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 08:01:39,640 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-1.c_Iteration9_Loop [2020-10-20 08:01:39,640 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 08:01:39,640 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 08:01:39,641 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 08:01:39,643 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 08:01:39,645 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 08:01:39,653 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 08:01:39,706 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 08:01:39,706 INFO L489 LassoAnalysis]: Using template 'affine'. 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 08:01:39,708 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 08:01:39,709 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:39,709 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:39,710 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:39,710 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:39,710 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:39,710 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:39,710 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:39,712 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 08:01:39,734 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 08:01:39,735 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:39,735 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:39,735 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:39,736 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:39,736 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:39,736 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:39,736 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:39,737 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 08:01:39,760 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 08:01:39,761 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:39,761 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:39,761 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:39,761 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:39,761 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:39,762 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:39,762 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:39,764 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-20 08:01:39,766 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2020-10-20 08:01:39,766 INFO L444 ModelExtractionUtils]: 2 out of 4 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 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 08:01:39,768 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-20 08:01:39,768 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-20 08:01:39,769 INFO L510 LassoAnalysis]: Proved termination. [2020-10-20 08:01:39,769 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2020-10-20 08:01:39,789 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-20 08:01:39,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:39,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:39,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-20 08:01:39,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:39,890 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:39,894 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:39,897 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:39,901 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:39,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:39,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-20 08:01:39,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:39,941 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 08:01:39,941 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 4 loop predicates [2020-10-20 08:01:39,941 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 319 states and 440 transitions. cyclomatic complexity: 125 Second operand 6 states. [2020-10-20 08:01:39,999 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 319 states and 440 transitions. cyclomatic complexity: 125. Second operand 6 states. Result 338 states and 460 transitions. Complement of second has 18 states. [2020-10-20 08:01:40,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2020-10-20 08:01:40,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-20 08:01:40,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 13 transitions. [2020-10-20 08:01:40,000 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 13 transitions. Stem has 61 letters. Loop has 4 letters. [2020-10-20 08:01:40,001 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:40,001 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-20 08:01:40,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:40,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:40,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-20 08:01:40,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:40,210 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:40,218 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:40,223 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:40,227 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:40,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:40,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-20 08:01:40,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:40,285 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 08:01:40,286 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 4 loop predicates [2020-10-20 08:01:40,286 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 319 states and 440 transitions. cyclomatic complexity: 125 Second operand 6 states. [2020-10-20 08:01:40,382 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 319 states and 440 transitions. cyclomatic complexity: 125. Second operand 6 states. Result 344 states and 466 transitions. Complement of second has 17 states. [2020-10-20 08:01:40,383 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 08:01:40,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-20 08:01:40,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 16 transitions. [2020-10-20 08:01:40,384 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 61 letters. Loop has 4 letters. [2020-10-20 08:01:40,384 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:40,384 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-20 08:01:40,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:40,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:40,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-20 08:01:40,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:40,510 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:40,515 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:40,519 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:40,523 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:40,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:40,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-20 08:01:40,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:40,583 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 08:01:40,583 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 4 loop predicates [2020-10-20 08:01:40,583 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 319 states and 440 transitions. cyclomatic complexity: 125 Second operand 6 states. [2020-10-20 08:01:40,659 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 319 states and 440 transitions. cyclomatic complexity: 125. Second operand 6 states. Result 421 states and 565 transitions. Complement of second has 27 states. [2020-10-20 08:01:40,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2020-10-20 08:01:40,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-20 08:01:40,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 22 transitions. [2020-10-20 08:01:40,661 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 61 letters. Loop has 4 letters. [2020-10-20 08:01:40,661 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:40,661 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 65 letters. Loop has 4 letters. [2020-10-20 08:01:40,662 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:40,662 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 61 letters. Loop has 8 letters. [2020-10-20 08:01:40,662 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:40,662 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 421 states and 565 transitions. [2020-10-20 08:01:40,667 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2020-10-20 08:01:40,670 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 421 states to 323 states and 445 transitions. [2020-10-20 08:01:40,671 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 124 [2020-10-20 08:01:40,671 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 136 [2020-10-20 08:01:40,671 INFO L73 IsDeterministic]: Start isDeterministic. Operand 323 states and 445 transitions. [2020-10-20 08:01:40,673 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 08:01:40,673 INFO L691 BuchiCegarLoop]: Abstraction has 323 states and 445 transitions. [2020-10-20 08:01:40,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states and 445 transitions. [2020-10-20 08:01:40,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 319. [2020-10-20 08:01:40,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 319 states. [2020-10-20 08:01:40,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 440 transitions. [2020-10-20 08:01:40,682 INFO L714 BuchiCegarLoop]: Abstraction has 319 states and 440 transitions. [2020-10-20 08:01:40,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 08:01:40,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-20 08:01:40,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2020-10-20 08:01:40,684 INFO L87 Difference]: Start difference. First operand 319 states and 440 transitions. Second operand 18 states. [2020-10-20 08:01:41,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 08:01:41,001 INFO L93 Difference]: Finished difference Result 288 states and 361 transitions. [2020-10-20 08:01:41,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-20 08:01:41,001 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 288 states and 361 transitions. [2020-10-20 08:01:41,004 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-10-20 08:01:41,005 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 288 states to 0 states and 0 transitions. [2020-10-20 08:01:41,005 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2020-10-20 08:01:41,005 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2020-10-20 08:01:41,005 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2020-10-20 08:01:41,005 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-20 08:01:41,005 INFO L691 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-20 08:01:41,005 INFO L714 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-20 08:01:41,005 INFO L594 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-20 08:01:41,005 INFO L427 BuchiCegarLoop]: ======== Iteration 10============ [2020-10-20 08:01:41,006 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2020-10-20 08:01:41,006 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-10-20 08:01:41,006 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2020-10-20 08:01:41,013 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 20.10 08:01:41 BoogieIcfgContainer [2020-10-20 08:01:41,013 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2020-10-20 08:01:41,014 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 08:01:41,014 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 08:01:41,014 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 08:01:41,015 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 08:01:08" (3/4) ... [2020-10-20 08:01:41,019 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-10-20 08:01:41,019 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 08:01:41,021 INFO L168 Benchmark]: Toolchain (without parser) took 33706.46 ms. Allocated memory was 35.1 MB in the beginning and 131.6 MB in the end (delta: 96.5 MB). Free memory was 12.5 MB in the beginning and 66.5 MB in the end (delta: -54.1 MB). Peak memory consumption was 42.4 MB. Max. memory is 14.3 GB. [2020-10-20 08:01:41,022 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 33.6 MB. Free memory was 18.4 MB in the beginning and 18.3 MB in the end (delta: 41.9 kB). Peak memory consumption was 41.9 kB. Max. memory is 14.3 GB. [2020-10-20 08:01:41,023 INFO L168 Benchmark]: CACSL2BoogieTranslator took 331.91 ms. Allocated memory was 35.1 MB in the beginning and 41.9 MB in the end (delta: 6.8 MB). Free memory was 11.5 MB in the beginning and 25.7 MB in the end (delta: -14.2 MB). Peak memory consumption was 8.3 MB. Max. memory is 14.3 GB. [2020-10-20 08:01:41,023 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.72 ms. Allocated memory is still 41.9 MB. Free memory was 25.6 MB in the beginning and 24.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 14.3 GB. [2020-10-20 08:01:41,024 INFO L168 Benchmark]: Boogie Preprocessor took 21.09 ms. Allocated memory is still 41.9 MB. Free memory was 24.1 MB in the beginning and 23.0 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 14.3 GB. [2020-10-20 08:01:41,024 INFO L168 Benchmark]: RCFGBuilder took 308.38 ms. Allocated memory is still 41.9 MB. Free memory was 22.8 MB in the beginning and 22.0 MB in the end (delta: 840.0 kB). Peak memory consumption was 13.7 MB. Max. memory is 14.3 GB. [2020-10-20 08:01:41,025 INFO L168 Benchmark]: BuchiAutomizer took 32988.97 ms. Allocated memory was 41.9 MB in the beginning and 131.6 MB in the end (delta: 89.7 MB). Free memory was 22.0 MB in the beginning and 66.5 MB in the end (delta: -44.5 MB). Peak memory consumption was 45.1 MB. Max. memory is 14.3 GB. [2020-10-20 08:01:41,025 INFO L168 Benchmark]: Witness Printer took 5.08 ms. Allocated memory is still 131.6 MB. Free memory is still 66.5 MB. There was no memory consumed. Max. memory is 14.3 GB. [2020-10-20 08:01:41,028 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 33.6 MB. Free memory was 18.4 MB in the beginning and 18.3 MB in the end (delta: 41.9 kB). Peak memory consumption was 41.9 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 331.91 ms. Allocated memory was 35.1 MB in the beginning and 41.9 MB in the end (delta: 6.8 MB). Free memory was 11.5 MB in the beginning and 25.7 MB in the end (delta: -14.2 MB). Peak memory consumption was 8.3 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 40.72 ms. Allocated memory is still 41.9 MB. Free memory was 25.6 MB in the beginning and 24.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 21.09 ms. Allocated memory is still 41.9 MB. Free memory was 24.1 MB in the beginning and 23.0 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 14.3 GB. * RCFGBuilder took 308.38 ms. Allocated memory is still 41.9 MB. Free memory was 22.8 MB in the beginning and 22.0 MB in the end (delta: 840.0 kB). Peak memory consumption was 13.7 MB. Max. memory is 14.3 GB. * BuchiAutomizer took 32988.97 ms. Allocated memory was 41.9 MB in the beginning and 131.6 MB in the end (delta: 89.7 MB). Free memory was 22.0 MB in the beginning and 66.5 MB in the end (delta: -44.5 MB). Peak memory consumption was 45.1 MB. Max. memory is 14.3 GB. * Witness Printer took 5.08 ms. Allocated memory is still 131.6 MB. Free memory is still 66.5 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 16 terminating modules (8 trivial, 3 deterministic, 5 nondeterministic). One deterministic module has affine ranking function \old(n) and consists of 4 locations. One deterministic module has affine ranking function n and consists of 10 locations. One deterministic module has affine ranking function n and consists of 7 locations. One nondeterministic module has affine ranking function n and consists of 9 locations. One nondeterministic module has affine ranking function \old(n) and consists of 5 locations. One nondeterministic module has affine ranking function n and consists of 6 locations. One nondeterministic module has affine ranking function n and consists of 6 locations. One nondeterministic module has affine ranking function n and consists of 6 locations. 8 modules have a trivial ranking function, the largest among these consists of 23 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 32.9s and 10 iterations. TraceHistogramMax:13. Analysis of lassos took 24.1s. Construction of modules took 1.8s. Büchi inclusion checks took 5.9s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 15. Automata minimization 0.3s AutomataMinimizationTime, 15 MinimizatonAttempts, 397 StatesRemovedByMinimization, 12 NontrivialMinimizations. Non-live state removal took 0.3s Buchi closure took 0.0s. Biggest automaton had 734 states and ocurred in iteration 7. Nontrivial modules had stage [2, 1, 5, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 8/26 HoareTripleCheckerStatistics: 353 SDtfs, 816 SDslu, 587 SDs, 0 SdLazy, 1993 SolverSat, 562 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.8s Time LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT1 conc0 concLT0 SILN0 SILU0 SILI1 SILT7 lasso0 LassoPreprocessingBenchmarks: Lassos: inital17 mio100 ax100 hnf91 lsp95 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq185 hnf92 smp80 dnf100 smp100 tf109 neg96 sie107 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 23ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 18 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 8 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 18.7s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...