./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 f470102c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -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 f612eebc128d68e9b4bc81ed92184f640c3b9bd4 ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-f470102 [2019-11-28 21:16:42,969 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-28 21:16:42,971 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-28 21:16:42,992 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-28 21:16:42,993 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-28 21:16:42,995 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-28 21:16:42,997 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-28 21:16:43,007 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-28 21:16:43,010 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-28 21:16:43,013 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-28 21:16:43,014 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-28 21:16:43,017 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-28 21:16:43,017 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-28 21:16:43,022 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-28 21:16:43,024 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-28 21:16:43,026 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-28 21:16:43,028 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-28 21:16:43,030 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-28 21:16:43,033 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-28 21:16:43,038 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-28 21:16:43,043 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-28 21:16:43,048 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-28 21:16:43,049 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-28 21:16:43,051 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-28 21:16:43,054 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-28 21:16:43,055 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-28 21:16:43,055 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-28 21:16:43,057 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-28 21:16:43,057 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-28 21:16:43,058 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-28 21:16:43,059 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-28 21:16:43,060 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-28 21:16:43,060 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-28 21:16:43,062 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-28 21:16:43,063 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-28 21:16:43,063 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-28 21:16:43,065 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-28 21:16:43,065 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-28 21:16:43,065 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-28 21:16:43,066 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-28 21:16:43,067 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-28 21:16:43,068 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-32bit-Automizer_Default.epf [2019-11-28 21:16:43,085 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-28 21:16:43,085 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-28 21:16:43,086 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-28 21:16:43,087 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-28 21:16:43,087 INFO L138 SettingsManager]: * Use SBE=true [2019-11-28 21:16:43,087 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2019-11-28 21:16:43,088 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2019-11-28 21:16:43,088 INFO L138 SettingsManager]: * Use old map elimination=false [2019-11-28 21:16:43,088 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2019-11-28 21:16:43,088 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2019-11-28 21:16:43,089 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2019-11-28 21:16:43,089 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-28 21:16:43,089 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-28 21:16:43,089 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-28 21:16:43,090 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-28 21:16:43,090 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-28 21:16:43,090 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-28 21:16:43,091 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2019-11-28 21:16:43,091 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2019-11-28 21:16:43,091 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2019-11-28 21:16:43,091 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-28 21:16:43,092 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-28 21:16:43,092 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2019-11-28 21:16:43,092 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-28 21:16:43,092 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2019-11-28 21:16:43,093 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-28 21:16:43,093 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-28 21:16:43,093 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2019-11-28 21:16:43,094 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-28 21:16:43,094 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-28 21:16:43,094 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-11-28 21:16:43,094 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2019-11-28 21:16:43,095 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2019-11-28 21:16:43,096 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 -> f612eebc128d68e9b4bc81ed92184f640c3b9bd4 [2019-11-28 21:16:43,435 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-28 21:16:43,455 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-28 21:16:43,459 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-28 21:16:43,460 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-28 21:16:43,461 INFO L275 PluginConnector]: CDTParser initialized [2019-11-28 21:16:43,462 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/fibo_7-1.c [2019-11-28 21:16:43,543 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3b984f6d2/7a9651d96608461fbf4cc6ae7d83aafc/FLAG7caa4fcbd [2019-11-28 21:16:44,018 INFO L306 CDTParser]: Found 1 translation units. [2019-11-28 21:16:44,019 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_7-1.c [2019-11-28 21:16:44,027 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3b984f6d2/7a9651d96608461fbf4cc6ae7d83aafc/FLAG7caa4fcbd [2019-11-28 21:16:44,378 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3b984f6d2/7a9651d96608461fbf4cc6ae7d83aafc [2019-11-28 21:16:44,382 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-28 21:16:44,383 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-28 21:16:44,384 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-28 21:16:44,384 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-28 21:16:44,387 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-28 21:16:44,388 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 09:16:44" (1/1) ... [2019-11-28 21:16:44,391 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6711512d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 09:16:44, skipping insertion in model container [2019-11-28 21:16:44,391 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 09:16:44" (1/1) ... [2019-11-28 21:16:44,399 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-28 21:16:44,414 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-28 21:16:44,617 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 21:16:44,624 INFO L203 MainTranslator]: Completed pre-run [2019-11-28 21:16:44,647 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 21:16:44,664 INFO L208 MainTranslator]: Completed translation [2019-11-28 21:16:44,665 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 09:16:44 WrapperNode [2019-11-28 21:16:44,667 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-28 21:16:44,668 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-28 21:16:44,668 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-28 21:16:44,668 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-28 21:16:44,679 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 09:16:44" (1/1) ... [2019-11-28 21:16:44,686 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 09:16:44" (1/1) ... [2019-11-28 21:16:44,708 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-28 21:16:44,709 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-28 21:16:44,709 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-28 21:16:44,709 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-28 21:16:44,799 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 09:16:44" (1/1) ... [2019-11-28 21:16:44,803 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 09:16:44" (1/1) ... [2019-11-28 21:16:44,803 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 09:16:44" (1/1) ... [2019-11-28 21:16:44,804 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 09:16:44" (1/1) ... [2019-11-28 21:16:44,807 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 09:16:44" (1/1) ... [2019-11-28 21:16:44,809 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 09:16:44" (1/1) ... [2019-11-28 21:16:44,810 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 09:16:44" (1/1) ... [2019-11-28 21:16:44,812 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-28 21:16:44,813 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-28 21:16:44,814 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-28 21:16:44,814 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-28 21:16:44,815 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 09:16:44" (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 [2019-11-28 21:16:44,886 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-28 21:16:44,887 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-28 21:16:44,887 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2019-11-28 21:16:44,887 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2019-11-28 21:16:45,052 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-28 21:16:45,053 INFO L287 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-28 21:16:45,054 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 09:16:45 BoogieIcfgContainer [2019-11-28 21:16:45,055 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-28 21:16:45,055 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2019-11-28 21:16:45,056 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2019-11-28 21:16:45,059 INFO L275 PluginConnector]: BuchiAutomizer initialized [2019-11-28 21:16:45,060 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-28 21:16:45,061 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 28.11 09:16:44" (1/3) ... [2019-11-28 21:16:45,062 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@18270f57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 28.11 09:16:45, skipping insertion in model container [2019-11-28 21:16:45,062 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-28 21:16:45,062 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 09:16:44" (2/3) ... [2019-11-28 21:16:45,063 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@18270f57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 28.11 09:16:45, skipping insertion in model container [2019-11-28 21:16:45,063 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-28 21:16:45,063 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 09:16:45" (3/3) ... [2019-11-28 21:16:45,065 INFO L371 chiAutomizerObserver]: Analyzing ICFG fibo_7-1.c [2019-11-28 21:16:45,123 INFO L356 BuchiCegarLoop]: Interprodecural is true [2019-11-28 21:16:45,124 INFO L357 BuchiCegarLoop]: Hoare is false [2019-11-28 21:16:45,124 INFO L358 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2019-11-28 21:16:45,124 INFO L359 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-28 21:16:45,124 INFO L360 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-28 21:16:45,125 INFO L361 BuchiCegarLoop]: Difference is false [2019-11-28 21:16:45,125 INFO L362 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-28 21:16:45,125 INFO L365 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2019-11-28 21:16:45,172 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 17 states. [2019-11-28 21:16:45,207 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-11-28 21:16:45,208 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 21:16:45,208 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 21:16:45,217 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2019-11-28 21:16:45,218 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2019-11-28 21:16:45,218 INFO L424 BuchiCegarLoop]: ======== Iteration 1============ [2019-11-28 21:16:45,218 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 17 states. [2019-11-28 21:16:45,221 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-11-28 21:16:45,221 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 21:16:45,221 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 21:16:45,222 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2019-11-28 21:16:45,222 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2019-11-28 21:16:45,231 INFO L794 eck$LassoCheckResult]: Stem: 8#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 7; 19#L25true call main_#t~ret2 := fibo(main_~x~0);< 11#fiboENTRYtrue [2019-11-28 21:16:45,232 INFO L796 eck$LassoCheckResult]: Loop: 11#fiboENTRYtrue ~n := #in~n; 7#L6true assume !(~n < 1); 10#L8true assume !(1 == ~n); 18#L11true call #t~ret0 := fibo(~n - 1);< 11#fiboENTRYtrue [2019-11-28 21:16:45,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:45,245 INFO L82 PathProgramCache]: Analyzing trace with hash 1021, now seen corresponding path program 1 times [2019-11-28 21:16:45,258 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 21:16:45,259 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013000557] [2019-11-28 21:16:45,259 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 21:16:45,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 21:16:45,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 21:16:45,365 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 21:16:45,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:45,367 INFO L82 PathProgramCache]: Analyzing trace with hash 1420172, now seen corresponding path program 1 times [2019-11-28 21:16:45,368 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 21:16:45,368 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223403961] [2019-11-28 21:16:45,368 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 21:16:45,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 21:16:45,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 21:16:45,383 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 21:16:45,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:45,385 INFO L82 PathProgramCache]: Analyzing trace with hash 943411592, now seen corresponding path program 1 times [2019-11-28 21:16:45,385 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 21:16:45,386 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808030797] [2019-11-28 21:16:45,386 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 21:16:45,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 21:16:45,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 21:16:45,402 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 21:16:45,525 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 21:16:45,525 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 21:16:45,526 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 21:16:45,526 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 21:16:45,526 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-28 21:16:45,526 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:45,526 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 21:16:45,527 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 21:16:45,527 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-1.c_Iteration1_Loop [2019-11-28 21:16:45,527 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 21:16:45,527 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 21:16:45,545 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:45,551 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:45,554 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:45,558 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:45,563 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:45,655 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 21:16:45,656 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) [2019-11-28 21:16:45,665 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 21:16:45,665 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 [2019-11-28 21:16:45,677 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 21:16:45,677 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_~n=0} Honda state: {fibo_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [MP z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Exception during sending of exit command (exit): Broken pipe No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:45,684 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 21:16:45,685 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 21:16:45,688 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 21:16:45,689 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 [2019-11-28 21:16:45,701 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 21:16:45,701 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 21:16:45,705 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 21:16:45,705 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret0=0} Honda state: {fibo_#t~ret0=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 [2019-11-28 21:16:45,711 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 21:16:45,711 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 21:16:45,715 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 21:16:45,715 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret1=0} Honda state: {fibo_#t~ret1=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 [2019-11-28 21:16:45,726 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 21:16:45,726 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 [2019-11-28 21:16:45,739 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-28 21:16:45,739 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 21:16:45,752 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-28 21:16:45,754 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 21:16:45,755 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 21:16:45,755 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 21:16:45,755 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 21:16:45,755 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-28 21:16:45,755 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:45,756 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 21:16:45,756 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 21:16:45,756 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-1.c_Iteration1_Loop [2019-11-28 21:16:45,756 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 21:16:45,757 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 21:16:45,758 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:45,766 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:45,770 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:45,773 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:45,776 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:45,847 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 21:16:45,853 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) [2019-11-28 21:16:45,875 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 [2019-11-28 21:16:45,878 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 21:16:45,879 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 21:16:45,880 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 21:16:45,880 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 21:16:45,881 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 21:16:45,884 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 21:16:45,884 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:45,888 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 [2019-11-28 21:16:45,899 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 [2019-11-28 21:16:45,904 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 21:16:45,904 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 21:16:45,905 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 21:16:45,905 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 21:16:45,905 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 21:16:45,906 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 21:16:45,907 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 21:16:45,915 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) [2019-11-28 21:16:45,933 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 Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:45,935 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 21:16:45,935 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 21:16:45,935 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 21:16:45,935 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 21:16:45,936 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 21:16:45,938 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 21:16:45,939 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 21:16:45,942 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) [2019-11-28 21:16:45,960 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 [2019-11-28 21:16:45,962 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 21:16:45,962 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 21:16:45,962 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 21:16:45,963 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 21:16:45,963 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 21:16:45,965 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 21:16:45,965 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:45,967 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) [2019-11-28 21:16:45,984 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 [2019-11-28 21:16:45,986 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 21:16:45,987 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 21:16:45,987 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 21:16:45,987 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 21:16:45,987 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 21:16:45,990 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 21:16:45,990 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:45,998 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-28 21:16:46,005 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-28 21:16:46,006 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) [2019-11-28 21:16:46,015 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-28 21:16:46,015 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-28 21:16:46,015 INFO L510 LassoAnalysis]: Proved termination. [2019-11-28 21:16:46,016 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_#in~n) = 1*fibo_#in~n Supporting invariants [] [MP z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Exception during sending of exit command (exit): Broken pipe [2019-11-28 21:16:46,027 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:46,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:46,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:46,095 INFO L264 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-28 21:16:46,099 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:46,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:46,129 INFO L264 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 21:16:46,130 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:46,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 21:16:46,194 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 [2019-11-28 21:16:46,196 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 17 states. Second operand 4 states. [2019-11-28 21:16:46,370 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 17 states.. Second operand 4 states. Result 47 states and 59 transitions. Complement of second has 12 states. [2019-11-28 21:16:46,372 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2019-11-28 21:16:46,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2019-11-28 21:16:46,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 10 transitions. [2019-11-28 21:16:46,379 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 2 letters. Loop has 4 letters. [2019-11-28 21:16:46,381 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:16:46,382 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 6 letters. Loop has 4 letters. [2019-11-28 21:16:46,382 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:16:46,382 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 2 letters. Loop has 8 letters. [2019-11-28 21:16:46,383 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:16:46,384 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 47 states and 59 transitions. [2019-11-28 21:16:46,402 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-11-28 21:16:46,410 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 47 states to 24 states and 33 transitions. [2019-11-28 21:16:46,412 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 16 [2019-11-28 21:16:46,413 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 17 [2019-11-28 21:16:46,414 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 33 transitions. [2019-11-28 21:16:46,416 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 21:16:46,416 INFO L688 BuchiCegarLoop]: Abstraction has 24 states and 33 transitions. [2019-11-28 21:16:46,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states and 33 transitions. [2019-11-28 21:16:46,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 19. [2019-11-28 21:16:46,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-11-28 21:16:46,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2019-11-28 21:16:46,454 INFO L711 BuchiCegarLoop]: Abstraction has 19 states and 25 transitions. [2019-11-28 21:16:46,454 INFO L591 BuchiCegarLoop]: Abstraction has 19 states and 25 transitions. [2019-11-28 21:16:46,454 INFO L424 BuchiCegarLoop]: ======== Iteration 2============ [2019-11-28 21:16:46,455 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 19 states and 25 transitions. [2019-11-28 21:16:46,456 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-11-28 21:16:46,456 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 21:16:46,456 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 21:16:46,460 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 21:16:46,461 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 21:16:46,461 INFO L794 eck$LassoCheckResult]: Stem: 120#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 7; 121#L25 call main_#t~ret2 := fibo(main_~x~0);< 125#fiboENTRY ~n := #in~n; 126#L6 assume !(~n < 1); 124#L8 assume !(1 == ~n); 118#L11 call #t~ret0 := fibo(~n - 1);< 127#fiboENTRY ~n := #in~n; 128#L6 assume ~n < 1;#res := 0; 123#fiboFINAL assume true; 117#fiboEXIT >#32#return; 119#L11-1 [2019-11-28 21:16:46,462 INFO L796 eck$LassoCheckResult]: Loop: 119#L11-1 call #t~ret1 := fibo(~n - 2);< 132#fiboENTRY ~n := #in~n; 135#L6 assume !(~n < 1); 134#L8 assume !(1 == ~n); 130#L11 call #t~ret0 := fibo(~n - 1);< 132#fiboENTRY ~n := #in~n; 135#L6 assume ~n < 1;#res := 0; 131#fiboFINAL assume true; 133#fiboEXIT >#32#return; 119#L11-1 [2019-11-28 21:16:46,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:46,462 INFO L82 PathProgramCache]: Analyzing trace with hash 531553871, now seen corresponding path program 1 times [2019-11-28 21:16:46,463 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 21:16:46,463 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449687735] [2019-11-28 21:16:46,463 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 21:16:46,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:46,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:46,563 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 21:16:46,564 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449687735] [2019-11-28 21:16:46,566 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696417225] [2019-11-28 21:16:46,566 INFO L94 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 [2019-11-28 21:16:46,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:46,597 INFO L264 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-28 21:16:46,599 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:46,623 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 21:16:46,624 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 21:16:46,624 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-11-28 21:16:46,626 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631821850] [2019-11-28 21:16:46,629 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-11-28 21:16:46,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:46,630 INFO L82 PathProgramCache]: Analyzing trace with hash -606345326, now seen corresponding path program 1 times [2019-11-28 21:16:46,630 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 21:16:46,631 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218378347] [2019-11-28 21:16:46,631 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 21:16:46,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:46,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:46,730 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-28 21:16:46,731 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218378347] [2019-11-28 21:16:46,731 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 21:16:46,731 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-28 21:16:46,732 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448849849] [2019-11-28 21:16:46,732 INFO L811 eck$LassoCheckResult]: loop already infeasible [2019-11-28 21:16:46,733 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 21:16:46,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-28 21:16:46,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-11-28 21:16:46,740 INFO L87 Difference]: Start difference. First operand 19 states and 25 transitions. cyclomatic complexity: 8 Second operand 6 states. [2019-11-28 21:16:46,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 21:16:46,854 INFO L93 Difference]: Finished difference Result 25 states and 31 transitions. [2019-11-28 21:16:46,854 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-28 21:16:46,855 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 25 states and 31 transitions. [2019-11-28 21:16:46,858 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-11-28 21:16:46,860 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 25 states to 23 states and 29 transitions. [2019-11-28 21:16:46,860 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 19 [2019-11-28 21:16:46,861 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 19 [2019-11-28 21:16:46,861 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 29 transitions. [2019-11-28 21:16:46,861 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 21:16:46,862 INFO L688 BuchiCegarLoop]: Abstraction has 23 states and 29 transitions. [2019-11-28 21:16:46,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states and 29 transitions. [2019-11-28 21:16:46,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-11-28 21:16:46,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-28 21:16:46,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2019-11-28 21:16:46,871 INFO L711 BuchiCegarLoop]: Abstraction has 23 states and 29 transitions. [2019-11-28 21:16:46,871 INFO L591 BuchiCegarLoop]: Abstraction has 23 states and 29 transitions. [2019-11-28 21:16:46,871 INFO L424 BuchiCegarLoop]: ======== Iteration 3============ [2019-11-28 21:16:46,871 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 23 states and 29 transitions. [2019-11-28 21:16:46,872 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-11-28 21:16:46,872 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 21:16:46,872 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 21:16:46,874 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 21:16:46,874 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1] [2019-11-28 21:16:46,875 INFO L794 eck$LassoCheckResult]: Stem: 220#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 7; 221#L25 call main_#t~ret2 := fibo(main_~x~0);< 225#fiboENTRY ~n := #in~n; 226#L6 assume !(~n < 1); 224#L8 assume !(1 == ~n); 218#L11 call #t~ret0 := fibo(~n - 1);< 227#fiboENTRY ~n := #in~n; 228#L6 assume !(~n < 1); 222#L8 assume 1 == ~n;#res := 1; 223#fiboFINAL assume true; 217#fiboEXIT >#32#return; 219#L11-1 [2019-11-28 21:16:46,875 INFO L796 eck$LassoCheckResult]: Loop: 219#L11-1 call #t~ret1 := fibo(~n - 2);< 232#fiboENTRY ~n := #in~n; 239#L6 assume !(~n < 1); 238#L8 assume !(1 == ~n); 230#L11 call #t~ret0 := fibo(~n - 1);< 232#fiboENTRY ~n := #in~n; 239#L6 assume !(~n < 1); 238#L8 assume 1 == ~n;#res := 1; 236#fiboFINAL assume true; 234#fiboEXIT >#32#return; 219#L11-1 [2019-11-28 21:16:46,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:46,875 INFO L82 PathProgramCache]: Analyzing trace with hash -701674289, now seen corresponding path program 1 times [2019-11-28 21:16:46,875 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 21:16:46,876 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810415555] [2019-11-28 21:16:46,876 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 21:16:46,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:46,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:46,974 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 21:16:46,975 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810415555] [2019-11-28 21:16:46,975 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339230903] [2019-11-28 21:16:46,975 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 21:16:47,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:47,008 INFO L264 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-28 21:16:47,009 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:47,025 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 21:16:47,025 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 21:16:47,025 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-11-28 21:16:47,026 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441473769] [2019-11-28 21:16:47,026 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-11-28 21:16:47,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:47,027 INFO L82 PathProgramCache]: Analyzing trace with hash -1616811028, now seen corresponding path program 1 times [2019-11-28 21:16:47,027 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 21:16:47,027 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33948103] [2019-11-28 21:16:47,027 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 21:16:47,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 21:16:47,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 21:16:47,040 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 21:16:47,167 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 21:16:47,167 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 21:16:47,168 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 21:16:47,168 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 21:16:47,168 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-28 21:16:47,168 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:47,168 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 21:16:47,169 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 21:16:47,169 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-1.c_Iteration3_Loop [2019-11-28 21:16:47,169 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 21:16:47,169 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 21:16:47,170 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:47,181 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:47,194 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:47,197 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:47,258 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 21:16:47,258 INFO L404 LassoAnalysis]: Checking for nontermination... 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) [2019-11-28 21:16:47,265 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 21:16:47,265 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 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) [2019-11-28 21:16:47,286 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-28 21:16:47,286 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 [2019-11-28 21:16:47,850 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-28 21:16:47,853 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 21:16:47,854 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 21:16:47,854 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 21:16:47,854 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 21:16:47,854 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-28 21:16:47,854 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:47,854 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 21:16:47,855 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 21:16:47,857 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-1.c_Iteration3_Loop [2019-11-28 21:16:47,857 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 21:16:47,857 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 21:16:47,858 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:47,866 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:47,873 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:47,876 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:47,923 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 21:16:47,923 INFO L489 LassoAnalysis]: Using template 'affine'. 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) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:47,935 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 [2019-11-28 21:16:47,937 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 21:16:47,937 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 21:16:47,937 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 21:16:47,937 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 21:16:47,938 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 21:16:47,939 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 21:16:47,939 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 21:16:47,942 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:47,958 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 [2019-11-28 21:16:47,960 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 21:16:47,961 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 21:16:47,961 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 21:16:47,961 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 21:16:47,961 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 21:16:47,963 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 21:16:47,963 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 21:16:47,966 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-28 21:16:47,970 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-28 21:16:47,970 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 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 21:16:47,984 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-28 21:16:47,985 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-28 21:16:47,985 INFO L510 LassoAnalysis]: Proved termination. [2019-11-28 21:16:47,985 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:47,988 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-28 21:16:48,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:48,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:48,025 INFO L264 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-28 21:16:48,027 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:48,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:48,081 INFO L264 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-28 21:16:48,083 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:48,155 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 21:16:48,155 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 5 loop predicates [2019-11-28 21:16:48,156 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 23 states and 29 transitions. cyclomatic complexity: 8 Second operand 7 states. [2019-11-28 21:16:48,428 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 23 states and 29 transitions. cyclomatic complexity: 8. Second operand 7 states. Result 134 states and 182 transitions. Complement of second has 28 states. [2019-11-28 21:16:48,432 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2019-11-28 21:16:48,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2019-11-28 21:16:48,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 34 transitions. [2019-11-28 21:16:48,435 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 34 transitions. Stem has 11 letters. Loop has 10 letters. [2019-11-28 21:16:48,435 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:16:48,436 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 34 transitions. Stem has 21 letters. Loop has 10 letters. [2019-11-28 21:16:48,436 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:16:48,437 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 34 transitions. Stem has 11 letters. Loop has 20 letters. [2019-11-28 21:16:48,438 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:16:48,438 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 134 states and 182 transitions. [2019-11-28 21:16:48,449 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2019-11-28 21:16:48,462 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 134 states to 107 states and 151 transitions. [2019-11-28 21:16:48,462 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 63 [2019-11-28 21:16:48,463 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 68 [2019-11-28 21:16:48,464 INFO L73 IsDeterministic]: Start isDeterministic. Operand 107 states and 151 transitions. [2019-11-28 21:16:48,465 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 21:16:48,465 INFO L688 BuchiCegarLoop]: Abstraction has 107 states and 151 transitions. [2019-11-28 21:16:48,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states and 151 transitions. [2019-11-28 21:16:48,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 93. [2019-11-28 21:16:48,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-11-28 21:16:48,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 125 transitions. [2019-11-28 21:16:48,502 INFO L711 BuchiCegarLoop]: Abstraction has 93 states and 125 transitions. [2019-11-28 21:16:48,503 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 21:16:48,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-28 21:16:48,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2019-11-28 21:16:48,504 INFO L87 Difference]: Start difference. First operand 93 states and 125 transitions. Second operand 8 states. [2019-11-28 21:16:48,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 21:16:48,629 INFO L93 Difference]: Finished difference Result 108 states and 146 transitions. [2019-11-28 21:16:48,631 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-28 21:16:48,631 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 108 states and 146 transitions. [2019-11-28 21:16:48,635 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [MP z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Exception during sending of exit command (exit): Broken pipe [2019-11-28 21:16:48,662 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 108 states to 105 states and 143 transitions. [2019-11-28 21:16:48,662 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 68 [2019-11-28 21:16:48,664 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 68 [2019-11-28 21:16:48,664 INFO L73 IsDeterministic]: Start isDeterministic. Operand 105 states and 143 transitions. [2019-11-28 21:16:48,664 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 21:16:48,664 INFO L688 BuchiCegarLoop]: Abstraction has 105 states and 143 transitions. [2019-11-28 21:16:48,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states and 143 transitions. [2019-11-28 21:16:48,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 93. [2019-11-28 21:16:48,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-11-28 21:16:48,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 124 transitions. [2019-11-28 21:16:48,682 INFO L711 BuchiCegarLoop]: Abstraction has 93 states and 124 transitions. [2019-11-28 21:16:48,682 INFO L591 BuchiCegarLoop]: Abstraction has 93 states and 124 transitions. [2019-11-28 21:16:48,682 INFO L424 BuchiCegarLoop]: ======== Iteration 4============ [2019-11-28 21:16:48,682 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 93 states and 124 transitions. [2019-11-28 21:16:48,684 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2019-11-28 21:16:48,684 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 21:16:48,684 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 21:16:48,686 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [5, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 21:16:48,686 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [6, 5, 5, 3, 3, 3, 3, 2, 2, 2, 1] [2019-11-28 21:16:48,687 INFO L794 eck$LassoCheckResult]: Stem: 744#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 7; 745#L25 call main_#t~ret2 := fibo(main_~x~0);< 769#fiboENTRY ~n := #in~n; 793#L6 assume !(~n < 1); 752#L8 assume !(1 == ~n); 753#L11 call #t~ret0 := fibo(~n - 1);< 759#fiboENTRY ~n := #in~n; 761#L6 assume !(~n < 1); 772#L8 assume !(1 == ~n); 760#L11 call #t~ret0 := fibo(~n - 1);< 759#fiboENTRY ~n := #in~n; 761#L6 assume !(~n < 1); 772#L8 assume !(1 == ~n); 760#L11 call #t~ret0 := fibo(~n - 1);< 759#fiboENTRY ~n := #in~n; 762#L6 assume !(~n < 1); 796#L8 assume 1 == ~n;#res := 1; 795#fiboFINAL assume true; 794#fiboEXIT >#32#return; 757#L11-1 call #t~ret1 := fibo(~n - 2);< 756#fiboENTRY ~n := #in~n; 758#L6 assume ~n < 1;#res := 0; 823#fiboFINAL assume true; 817#fiboEXIT >#34#return; 814#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret0;havoc #t~ret1; 812#fiboFINAL assume true; 802#fiboEXIT >#32#return; 804#L11-1 [2019-11-28 21:16:48,687 INFO L796 eck$LassoCheckResult]: Loop: 804#L11-1 call #t~ret1 := fibo(~n - 2);< 810#fiboENTRY ~n := #in~n; 818#L6 assume !(~n < 1); 815#L8 assume !(1 == ~n); 808#L11 call #t~ret0 := fibo(~n - 1);< 810#fiboENTRY ~n := #in~n; 818#L6 assume !(~n < 1); 815#L8 assume !(1 == ~n); 808#L11 call #t~ret0 := fibo(~n - 1);< 810#fiboENTRY ~n := #in~n; 818#L6 assume !(~n < 1); 815#L8 assume 1 == ~n;#res := 1; 816#fiboFINAL assume true; 813#fiboEXIT >#32#return; 804#L11-1 call #t~ret1 := fibo(~n - 2);< 810#fiboENTRY ~n := #in~n; 818#L6 assume !(~n < 1); 815#L8 assume !(1 == ~n); 808#L11 call #t~ret0 := fibo(~n - 1);< 810#fiboENTRY ~n := #in~n; 818#L6 assume !(~n < 1); 815#L8 assume 1 == ~n;#res := 1; 816#fiboFINAL assume true; 813#fiboEXIT >#32#return; 804#L11-1 call #t~ret1 := fibo(~n - 2);< 810#fiboENTRY ~n := #in~n; 818#L6 assume ~n < 1;#res := 0; 819#fiboFINAL assume true; 821#fiboEXIT >#34#return; 809#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret0;havoc #t~ret1; 811#fiboFINAL assume true; 807#fiboEXIT >#34#return; 809#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret0;havoc #t~ret1; 811#fiboFINAL assume true; 807#fiboEXIT >#32#return; 804#L11-1 [2019-11-28 21:16:48,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:48,688 INFO L82 PathProgramCache]: Analyzing trace with hash -240562386, now seen corresponding path program 1 times [2019-11-28 21:16:48,688 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 21:16:48,689 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885367008] [2019-11-28 21:16:48,689 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 21:16:48,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:48,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:48,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:48,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:48,848 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-28 21:16:48,849 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885367008] [2019-11-28 21:16:48,849 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841213940] [2019-11-28 21:16:48,849 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 21:16:48,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:48,875 INFO L264 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-28 21:16:48,877 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:48,907 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-28 21:16:48,909 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 21:16:48,909 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2019-11-28 21:16:48,910 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908238598] [2019-11-28 21:16:48,911 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-11-28 21:16:48,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:48,911 INFO L82 PathProgramCache]: Analyzing trace with hash 1408722332, now seen corresponding path program 1 times [2019-11-28 21:16:48,911 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 21:16:48,912 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868453794] [2019-11-28 21:16:48,912 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 21:16:48,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:48,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:48,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:48,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:49,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:49,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:49,029 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 26 proven. 13 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-11-28 21:16:49,029 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868453794] [2019-11-28 21:16:49,030 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431471466] [2019-11-28 21:16:49,030 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 21:16:49,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:49,070 INFO L264 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-28 21:16:49,072 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:49,101 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 25 proven. 15 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-11-28 21:16:49,102 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 21:16:49,102 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2019-11-28 21:16:49,103 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207625840] [2019-11-28 21:16:49,103 INFO L811 eck$LassoCheckResult]: loop already infeasible [2019-11-28 21:16:49,103 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 21:16:49,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-28 21:16:49,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2019-11-28 21:16:49,104 INFO L87 Difference]: Start difference. First operand 93 states and 124 transitions. cyclomatic complexity: 36 Second operand 12 states. [2019-11-28 21:16:49,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 21:16:49,348 INFO L93 Difference]: Finished difference Result 115 states and 157 transitions. [2019-11-28 21:16:49,349 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-28 21:16:49,349 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 115 states and 157 transitions. [2019-11-28 21:16:49,353 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 15 [2019-11-28 21:16:49,357 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 115 states to 113 states and 155 transitions. [2019-11-28 21:16:49,357 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 76 [2019-11-28 21:16:49,358 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 76 [2019-11-28 21:16:49,358 INFO L73 IsDeterministic]: Start isDeterministic. Operand 113 states and 155 transitions. [2019-11-28 21:16:49,358 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 21:16:49,358 INFO L688 BuchiCegarLoop]: Abstraction has 113 states and 155 transitions. [2019-11-28 21:16:49,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states and 155 transitions. [2019-11-28 21:16:49,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2019-11-28 21:16:49,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2019-11-28 21:16:49,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 155 transitions. [2019-11-28 21:16:49,371 INFO L711 BuchiCegarLoop]: Abstraction has 113 states and 155 transitions. [2019-11-28 21:16:49,372 INFO L591 BuchiCegarLoop]: Abstraction has 113 states and 155 transitions. [2019-11-28 21:16:49,372 INFO L424 BuchiCegarLoop]: ======== Iteration 5============ [2019-11-28 21:16:49,372 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 113 states and 155 transitions. [2019-11-28 21:16:49,374 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 15 [2019-11-28 21:16:49,375 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 21:16:49,375 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 21:16:49,377 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [6, 5, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 21:16:49,377 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2019-11-28 21:16:49,377 INFO L794 eck$LassoCheckResult]: Stem: 1248#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 7; 1249#L25 call main_#t~ret2 := fibo(main_~x~0);< 1278#fiboENTRY ~n := #in~n; 1308#L6 assume !(~n < 1); 1307#L8 assume !(1 == ~n); 1256#L11 call #t~ret0 := fibo(~n - 1);< 1273#fiboENTRY ~n := #in~n; 1274#L6 assume !(~n < 1); 1255#L8 assume !(1 == ~n); 1257#L11 call #t~ret0 := fibo(~n - 1);< 1301#fiboENTRY ~n := #in~n; 1305#L6 assume !(~n < 1); 1303#L8 assume !(1 == ~n); 1263#L11 call #t~ret0 := fibo(~n - 1);< 1301#fiboENTRY ~n := #in~n; 1305#L6 assume !(~n < 1); 1303#L8 assume !(1 == ~n); 1263#L11 call #t~ret0 := fibo(~n - 1);< 1301#fiboENTRY ~n := #in~n; 1306#L6 assume !(~n < 1); 1304#L8 assume 1 == ~n;#res := 1; 1302#fiboFINAL assume true; 1300#fiboEXIT >#32#return; 1243#L11-1 call #t~ret1 := fibo(~n - 2);< 1298#fiboENTRY ~n := #in~n; 1345#L6 assume ~n < 1;#res := 0; 1344#fiboFINAL assume true; 1342#fiboEXIT >#34#return; 1340#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret0;havoc #t~ret1; 1339#fiboFINAL assume true; 1332#fiboEXIT >#32#return; 1260#L11-1 [2019-11-28 21:16:49,378 INFO L796 eck$LassoCheckResult]: Loop: 1260#L11-1 call #t~ret1 := fibo(~n - 2);< 1276#fiboENTRY ~n := #in~n; 1309#L6 assume !(~n < 1); 1311#L8 assume !(1 == ~n); 1262#L11 call #t~ret0 := fibo(~n - 1);< 1276#fiboENTRY ~n := #in~n; 1309#L6 assume !(~n < 1); 1311#L8 assume !(1 == ~n); 1262#L11 call #t~ret0 := fibo(~n - 1);< 1276#fiboENTRY ~n := #in~n; 1309#L6 assume !(~n < 1); 1311#L8 assume 1 == ~n;#res := 1; 1254#fiboFINAL assume true; 1346#fiboEXIT >#32#return; 1252#L11-1 call #t~ret1 := fibo(~n - 2);< 1271#fiboENTRY ~n := #in~n; 1272#L6 assume ~n < 1;#res := 0; 1310#fiboFINAL assume true; 1347#fiboEXIT >#34#return; 1244#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret0;havoc #t~ret1; 1258#fiboFINAL assume true; 1264#fiboEXIT >#32#return; 1260#L11-1 [2019-11-28 21:16:49,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:49,378 INFO L82 PathProgramCache]: Analyzing trace with hash 1087292419, now seen corresponding path program 2 times [2019-11-28 21:16:49,378 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 21:16:49,379 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325697033] [2019-11-28 21:16:49,379 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 21:16:49,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:49,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:49,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:49,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:49,530 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 45 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-28 21:16:49,530 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325697033] [2019-11-28 21:16:49,530 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626927134] [2019-11-28 21:16:49,531 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 21:16:49,561 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-28 21:16:49,562 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 21:16:49,563 INFO L264 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-28 21:16:49,567 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:49,595 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 45 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-28 21:16:49,596 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 21:16:49,596 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-11-28 21:16:49,596 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872398033] [2019-11-28 21:16:49,597 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-11-28 21:16:49,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:49,597 INFO L82 PathProgramCache]: Analyzing trace with hash 22774646, now seen corresponding path program 2 times [2019-11-28 21:16:49,598 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 21:16:49,598 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123079505] [2019-11-28 21:16:49,598 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 21:16:49,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 21:16:49,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 21:16:49,611 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 21:16:49,870 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 21:16:49,870 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 21:16:49,870 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 21:16:49,870 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 21:16:49,870 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-28 21:16:49,870 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:49,870 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 21:16:49,871 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 21:16:49,871 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-1.c_Iteration5_Loop [2019-11-28 21:16:49,871 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 21:16:49,871 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 21:16:49,872 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:49,874 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:49,876 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:49,879 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:49,962 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 21:16:49,963 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:49,968 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 21:16:49,968 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 21:16:49,971 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 21:16:49,971 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret1=0} Honda state: {fibo_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] 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 [2019-11-28 21:16:49,978 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 21:16:49,978 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 21:16:49,981 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 21:16:49,981 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 [2019-11-28 21:16:49,986 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 21:16:49,986 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 21:16:49,989 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 21:16:49,989 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret0=1} Honda state: {fibo_#t~ret0=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:49,997 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 21:16:49,997 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:50,007 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-28 21:16:50,008 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 21:16:50,530 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-28 21:16:50,532 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 21:16:50,533 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 21:16:50,533 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 21:16:50,533 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 21:16:50,533 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-28 21:16:50,533 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:50,533 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 21:16:50,533 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 21:16:50,534 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-1.c_Iteration5_Loop [2019-11-28 21:16:50,534 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 21:16:50,534 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 21:16:50,535 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:50,541 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:50,542 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:50,554 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:50,629 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 21:16:50,629 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:50,637 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 [2019-11-28 21:16:50,639 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 21:16:50,639 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 21:16:50,639 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 21:16:50,640 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 21:16:50,640 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 21:16:50,641 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 21:16:50,641 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 21:16:50,643 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 21:16:50,649 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 [2019-11-28 21:16:50,651 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 21:16:50,651 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 21:16:50,651 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 21:16:50,651 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 21:16:50,652 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 21:16:50,652 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 21:16:50,652 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:50,653 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 21:16:50,658 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 31 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:50,660 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 21:16:50,660 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 21:16:50,660 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 21:16:50,660 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 21:16:50,661 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 21:16:50,662 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 21:16:50,662 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 21:16:50,665 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-28 21:16:50,668 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2019-11-28 21:16:50,668 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 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 [2019-11-28 21:16:50,676 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-28 21:16:50,676 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-28 21:16:50,676 INFO L510 LassoAnalysis]: Proved termination. [2019-11-28 21:16:50,676 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2019-11-28 21:16:50,679 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-28 21:16:50,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:50,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:50,726 INFO L264 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-28 21:16:50,729 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:50,749 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 21:16:50,755 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 21:16:50,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:50,793 INFO L264 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-28 21:16:50,802 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:50,860 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-28 21:16:50,860 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 [2019-11-28 21:16:50,860 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 113 states and 155 transitions. cyclomatic complexity: 48 Second operand 8 states. [2019-11-28 21:16:51,090 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 113 states and 155 transitions. cyclomatic complexity: 48. Second operand 8 states. Result 182 states and 247 transitions. Complement of second has 33 states. [2019-11-28 21:16:51,091 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 9 states 2 stem states 6 non-accepting loop states 1 accepting loop states [2019-11-28 21:16:51,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-11-28 21:16:51,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 36 transitions. [2019-11-28 21:16:51,091 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 36 transitions. Stem has 31 letters. Loop has 22 letters. [2019-11-28 21:16:51,092 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:16:51,092 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-28 21:16:51,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:51,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:51,145 INFO L264 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-28 21:16:51,147 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:51,168 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 21:16:51,171 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 21:16:51,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:51,200 INFO L264 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-28 21:16:51,202 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:51,263 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-28 21:16:51,264 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 [2019-11-28 21:16:51,264 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 113 states and 155 transitions. cyclomatic complexity: 48 Second operand 8 states. [2019-11-28 21:16:51,474 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 113 states and 155 transitions. cyclomatic complexity: 48. Second operand 8 states. Result 307 states and 416 transitions. Complement of second has 25 states. [2019-11-28 21:16:51,475 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2019-11-28 21:16:51,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-11-28 21:16:51,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 23 transitions. [2019-11-28 21:16:51,476 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 23 transitions. Stem has 31 letters. Loop has 22 letters. [2019-11-28 21:16:51,477 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:16:51,477 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-28 21:16:51,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:51,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:51,533 INFO L264 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-28 21:16:51,536 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:51,559 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 21:16:51,563 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 21:16:51,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:51,592 INFO L264 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-28 21:16:51,594 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:51,667 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-28 21:16:51,667 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 [2019-11-28 21:16:51,667 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 113 states and 155 transitions. cyclomatic complexity: 48 Second operand 8 states. [MP z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (32)] Exception during sending of exit command (exit): Broken pipe [2019-11-28 21:16:51,971 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 113 states and 155 transitions. cyclomatic complexity: 48. Second operand 8 states. Result 1077 states and 1512 transitions. Complement of second has 130 states. [2019-11-28 21:16:51,972 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 9 states 2 stem states 6 non-accepting loop states 1 accepting loop states [2019-11-28 21:16:51,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-11-28 21:16:51,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 41 transitions. [2019-11-28 21:16:51,973 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 41 transitions. Stem has 31 letters. Loop has 22 letters. [2019-11-28 21:16:51,974 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:16:51,974 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 41 transitions. Stem has 53 letters. Loop has 22 letters. [2019-11-28 21:16:51,975 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:16:51,975 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 41 transitions. Stem has 31 letters. Loop has 44 letters. [2019-11-28 21:16:51,977 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:16:51,978 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1077 states and 1512 transitions. [2019-11-28 21:16:51,998 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 58 [2019-11-28 21:16:52,016 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1077 states to 604 states and 935 transitions. [2019-11-28 21:16:52,017 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 242 [2019-11-28 21:16:52,018 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 271 [2019-11-28 21:16:52,019 INFO L73 IsDeterministic]: Start isDeterministic. Operand 604 states and 935 transitions. [2019-11-28 21:16:52,020 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 21:16:52,020 INFO L688 BuchiCegarLoop]: Abstraction has 604 states and 935 transitions. [2019-11-28 21:16:52,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states and 935 transitions. [2019-11-28 21:16:52,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 477. [2019-11-28 21:16:52,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 477 states. [2019-11-28 21:16:52,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 725 transitions. [2019-11-28 21:16:52,069 INFO L711 BuchiCegarLoop]: Abstraction has 477 states and 725 transitions. [2019-11-28 21:16:52,070 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 21:16:52,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-28 21:16:52,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2019-11-28 21:16:52,070 INFO L87 Difference]: Start difference. First operand 477 states and 725 transitions. Second operand 14 states. [2019-11-28 21:16:52,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 21:16:52,333 INFO L93 Difference]: Finished difference Result 537 states and 809 transitions. [2019-11-28 21:16:52,333 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-28 21:16:52,333 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 537 states and 809 transitions. [2019-11-28 21:16:52,344 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2019-11-28 21:16:52,355 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 537 states to 534 states and 802 transitions. [2019-11-28 21:16:52,355 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 239 [2019-11-28 21:16:52,356 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 239 [2019-11-28 21:16:52,356 INFO L73 IsDeterministic]: Start isDeterministic. Operand 534 states and 802 transitions. [2019-11-28 21:16:52,357 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 21:16:52,357 INFO L688 BuchiCegarLoop]: Abstraction has 534 states and 802 transitions. [2019-11-28 21:16:52,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states and 802 transitions. [2019-11-28 21:16:52,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 494. [2019-11-28 21:16:52,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 494 states. [2019-11-28 21:16:52,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 746 transitions. [2019-11-28 21:16:52,383 INFO L711 BuchiCegarLoop]: Abstraction has 494 states and 746 transitions. [2019-11-28 21:16:52,383 INFO L591 BuchiCegarLoop]: Abstraction has 494 states and 746 transitions. [2019-11-28 21:16:52,384 INFO L424 BuchiCegarLoop]: ======== Iteration 6============ [2019-11-28 21:16:52,384 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 494 states and 746 transitions. [2019-11-28 21:16:52,389 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2019-11-28 21:16:52,389 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 21:16:52,389 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 21:16:52,390 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1] [2019-11-28 21:16:52,391 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2019-11-28 21:16:52,391 INFO L794 eck$LassoCheckResult]: Stem: 4807#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 7; 4808#L25 call main_#t~ret2 := fibo(main_~x~0);< 4846#fiboENTRY ~n := #in~n; 4869#L6 assume !(~n < 1); 4868#L8 assume !(1 == ~n); 4864#L11 call #t~ret0 := fibo(~n - 1);< 4867#fiboENTRY ~n := #in~n; 4866#L6 assume !(~n < 1); 4865#L8 assume !(1 == ~n); 4860#L11 call #t~ret0 := fibo(~n - 1);< 4862#fiboENTRY ~n := #in~n; 4863#L6 assume !(~n < 1); 4859#L8 assume !(1 == ~n); 4811#L11 call #t~ret0 := fibo(~n - 1);< 4856#fiboENTRY ~n := #in~n; 4857#L6 assume !(~n < 1); 4861#L8 assume !(1 == ~n); 4810#L11 call #t~ret0 := fibo(~n - 1);< 4856#fiboENTRY ~n := #in~n; 4858#L6 assume !(~n < 1); 4809#L8 assume 1 == ~n;#res := 1; 4812#fiboFINAL assume true; 4951#fiboEXIT >#32#return; 4930#L11-1 call #t~ret1 := fibo(~n - 2);< 4938#fiboENTRY ~n := #in~n; 5030#L6 assume !(~n < 1); 4955#L8 assume !(1 == ~n); 4956#L11 call #t~ret0 := fibo(~n - 1);< 4965#fiboENTRY ~n := #in~n; 5112#L6 assume !(~n < 1); 5035#L8 assume !(1 == ~n); 5036#L11 call #t~ret0 := fibo(~n - 1);< 5054#fiboENTRY [2019-11-28 21:16:52,391 INFO L796 eck$LassoCheckResult]: Loop: 5054#fiboENTRY ~n := #in~n; 5065#L6 assume !(~n < 1); 5062#L8 assume !(1 == ~n); 5051#L11 call #t~ret0 := fibo(~n - 1);< 5054#fiboENTRY [2019-11-28 21:16:52,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:52,392 INFO L82 PathProgramCache]: Analyzing trace with hash 116207529, now seen corresponding path program 1 times [2019-11-28 21:16:52,392 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 21:16:52,392 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436793225] [2019-11-28 21:16:52,392 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 21:16:52,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:52,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:52,585 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 8 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 21:16:52,586 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436793225] [2019-11-28 21:16:52,586 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265303545] [2019-11-28 21:16:52,586 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 21:16:52,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:52,619 INFO L264 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-28 21:16:52,621 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:52,653 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 38 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-28 21:16:52,653 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 21:16:52,653 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 13] total 20 [2019-11-28 21:16:52,654 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195916276] [2019-11-28 21:16:52,654 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-11-28 21:16:52,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:52,654 INFO L82 PathProgramCache]: Analyzing trace with hash 1420172, now seen corresponding path program 2 times [2019-11-28 21:16:52,655 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 21:16:52,655 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386470898] [2019-11-28 21:16:52,655 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 21:16:52,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 21:16:52,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 21:16:52,659 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 21:16:52,700 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 21:16:52,701 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 21:16:52,701 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 21:16:52,701 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 21:16:52,701 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-28 21:16:52,701 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:52,701 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 21:16:52,701 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 21:16:52,701 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-1.c_Iteration6_Loop [2019-11-28 21:16:52,701 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 21:16:52,702 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 21:16:52,702 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:52,704 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:52,706 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:52,707 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:52,713 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:52,748 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 21:16:52,749 INFO L404 LassoAnalysis]: Checking for nontermination... 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 [2019-11-28 21:16:52,755 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 21:16:52,756 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 21:16:52,760 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 21:16:52,761 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 35 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 21:16:52,771 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 21:16:52,771 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:52,775 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 21:16:52,775 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 36 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 21:16:52,786 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 21:16:52,787 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 [2019-11-28 21:16:52,791 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 21:16:52,791 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret0=0} Honda state: {fibo_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] 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) [2019-11-28 21:16:52,800 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 21:16:52,800 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 37 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 38 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 21:16:52,813 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-28 21:16:52,813 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:52,872 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-28 21:16:52,875 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 21:16:52,875 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 21:16:52,875 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 21:16:52,875 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 21:16:52,875 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-28 21:16:52,875 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:52,875 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 21:16:52,876 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 21:16:52,876 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-1.c_Iteration6_Loop [2019-11-28 21:16:52,876 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 21:16:52,876 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 21:16:52,877 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:52,881 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:52,884 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:52,890 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:52,897 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:52,948 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 21:16:52,948 INFO L489 LassoAnalysis]: Using template 'affine'. 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) [2019-11-28 21:16:52,956 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 21:16:52,958 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 21:16:52,958 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 21:16:52,958 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 21:16:52,958 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 21:16:52,958 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 21:16:52,959 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 21:16:52,959 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 39 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:52,961 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) [2019-11-28 21:16:52,972 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 [2019-11-28 21:16:52,975 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 21:16:52,975 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 21:16:52,975 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 21:16:52,975 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 21:16:52,975 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 21:16:52,977 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 21:16:52,977 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 40 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:52,979 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 [2019-11-28 21:16:52,995 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 [2019-11-28 21:16:52,997 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 21:16:52,997 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 21:16:52,997 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 21:16:52,997 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 21:16:52,997 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 21:16:52,998 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 21:16:52,998 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 21:16:52,999 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 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 [2019-11-28 21:16:53,005 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 21:16:53,006 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 21:16:53,006 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 21:16:53,007 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 21:16:53,007 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 21:16:53,007 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 21:16:53,011 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 21:16:53,011 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 21:16:53,014 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-28 21:16:53,018 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-28 21:16:53,018 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 43 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 21:16:53,026 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-28 21:16:53,026 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-28 21:16:53,026 INFO L510 LassoAnalysis]: Proved termination. [2019-11-28 21:16:53,027 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_#in~n) = 1*fibo_#in~n Supporting invariants [] [2019-11-28 21:16:53,029 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed Waiting until toolchain timeout for monitored process 43 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:53,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:53,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:53,084 INFO L264 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-28 21:16:53,086 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:53,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:53,124 INFO L264 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 21:16:53,125 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:53,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 21:16:53,145 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 [2019-11-28 21:16:53,145 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 494 states and 746 transitions. cyclomatic complexity: 262 Second operand 5 states. [2019-11-28 21:16:53,224 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 494 states and 746 transitions. cyclomatic complexity: 262. Second operand 5 states. Result 507 states and 759 transitions. Complement of second has 13 states. [2019-11-28 21:16:53,225 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2019-11-28 21:16:53,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-11-28 21:16:53,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 12 transitions. [2019-11-28 21:16:53,226 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 12 transitions. Stem has 32 letters. Loop has 4 letters. [2019-11-28 21:16:53,226 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:16:53,226 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-28 21:16:53,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:53,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:53,283 INFO L264 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-28 21:16:53,285 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:53,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:53,316 INFO L264 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 21:16:53,316 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:53,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 21:16:53,341 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 [2019-11-28 21:16:53,342 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 494 states and 746 transitions. cyclomatic complexity: 262 Second operand 5 states. [2019-11-28 21:16:53,415 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 494 states and 746 transitions. cyclomatic complexity: 262. Second operand 5 states. Result 507 states and 759 transitions. Complement of second has 13 states. [2019-11-28 21:16:53,415 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2019-11-28 21:16:53,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-11-28 21:16:53,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 12 transitions. [2019-11-28 21:16:53,416 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 12 transitions. Stem has 32 letters. Loop has 4 letters. [2019-11-28 21:16:53,416 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:16:53,416 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-28 21:16:53,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:53,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:53,471 INFO L264 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-28 21:16:53,473 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:53,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:53,506 INFO L264 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 21:16:53,506 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:53,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 21:16:53,525 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 [2019-11-28 21:16:53,525 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 494 states and 746 transitions. cyclomatic complexity: 262 Second operand 5 states. [2019-11-28 21:16:53,619 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 494 states and 746 transitions. cyclomatic complexity: 262. Second operand 5 states. Result 650 states and 920 transitions. Complement of second has 14 states. [2019-11-28 21:16:53,619 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2019-11-28 21:16:53,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-11-28 21:16:53,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 20 transitions. [2019-11-28 21:16:53,622 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 20 transitions. Stem has 32 letters. Loop has 4 letters. [2019-11-28 21:16:53,622 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:16:53,622 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 20 transitions. Stem has 36 letters. Loop has 4 letters. [2019-11-28 21:16:53,623 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:16:53,623 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 20 transitions. Stem has 32 letters. Loop has 8 letters. [2019-11-28 21:16:53,626 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:16:53,626 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 650 states and 920 transitions. [2019-11-28 21:16:53,640 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2019-11-28 21:16:53,651 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 650 states to 548 states and 806 transitions. [2019-11-28 21:16:53,651 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 199 [2019-11-28 21:16:53,652 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 208 [2019-11-28 21:16:53,652 INFO L73 IsDeterministic]: Start isDeterministic. Operand 548 states and 806 transitions. [2019-11-28 21:16:53,660 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 21:16:53,660 INFO L688 BuchiCegarLoop]: Abstraction has 548 states and 806 transitions. [2019-11-28 21:16:53,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states and 806 transitions. [2019-11-28 21:16:53,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 518. [2019-11-28 21:16:53,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 518 states. [2019-11-28 21:16:53,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 770 transitions. [2019-11-28 21:16:53,690 INFO L711 BuchiCegarLoop]: Abstraction has 518 states and 770 transitions. [2019-11-28 21:16:53,690 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 21:16:53,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-28 21:16:53,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2019-11-28 21:16:53,691 INFO L87 Difference]: Start difference. First operand 518 states and 770 transitions. Second operand 20 states. [2019-11-28 21:16:54,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 21:16:54,048 INFO L93 Difference]: Finished difference Result 585 states and 871 transitions. [2019-11-28 21:16:54,049 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-28 21:16:54,049 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 585 states and 871 transitions. [2019-11-28 21:16:54,058 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2019-11-28 21:16:54,068 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 585 states to 575 states and 857 transitions. [2019-11-28 21:16:54,069 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 221 [2019-11-28 21:16:54,069 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 221 [2019-11-28 21:16:54,069 INFO L73 IsDeterministic]: Start isDeterministic. Operand 575 states and 857 transitions. [2019-11-28 21:16:54,070 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 21:16:54,070 INFO L688 BuchiCegarLoop]: Abstraction has 575 states and 857 transitions. [2019-11-28 21:16:54,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states and 857 transitions. [2019-11-28 21:16:54,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 541. [2019-11-28 21:16:54,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 541 states. [2019-11-28 21:16:54,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 807 transitions. [2019-11-28 21:16:54,093 INFO L711 BuchiCegarLoop]: Abstraction has 541 states and 807 transitions. [2019-11-28 21:16:54,093 INFO L591 BuchiCegarLoop]: Abstraction has 541 states and 807 transitions. [2019-11-28 21:16:54,093 INFO L424 BuchiCegarLoop]: ======== Iteration 7============ [2019-11-28 21:16:54,094 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 541 states and 807 transitions. [2019-11-28 21:16:54,098 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2019-11-28 21:16:54,098 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 21:16:54,098 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 21:16:54,102 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [9, 9, 8, 7, 1, 1, 1, 1, 1, 1] [2019-11-28 21:16:54,103 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2019-11-28 21:16:54,104 INFO L794 eck$LassoCheckResult]: Stem: 8597#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 7; 8598#L25 call main_#t~ret2 := fibo(main_~x~0);< 8631#fiboENTRY ~n := #in~n; 8671#L6 assume !(~n < 1); 8669#L8 assume !(1 == ~n); 8666#L11 call #t~ret0 := fibo(~n - 1);< 8667#fiboENTRY ~n := #in~n; 8677#L6 assume !(~n < 1); 8676#L8 assume !(1 == ~n); 8653#L11 call #t~ret0 := fibo(~n - 1);< 8675#fiboENTRY ~n := #in~n; 8679#L6 assume !(~n < 1); 8660#L8 assume !(1 == ~n); 8655#L11 call #t~ret0 := fibo(~n - 1);< 8657#fiboENTRY ~n := #in~n; 8711#L6 assume !(~n < 1); 8708#L8 assume !(1 == ~n); 8649#L11 call #t~ret0 := fibo(~n - 1);< 8656#fiboENTRY ~n := #in~n; 8721#L6 assume !(~n < 1); 8710#L8 assume !(1 == ~n); 8648#L11 call #t~ret0 := fibo(~n - 1);< 8656#fiboENTRY ~n := #in~n; 8730#L6 assume !(~n < 1); 8796#L8 assume 1 == ~n;#res := 1; 8794#fiboFINAL assume true; 8793#fiboEXIT >#32#return; 8785#L11-1 call #t~ret1 := fibo(~n - 2);< 8792#fiboENTRY ~n := #in~n; 9030#L6 assume !(~n < 1); 9006#L8 assume !(1 == ~n); 8600#L11 call #t~ret0 := fibo(~n - 1);< 8639#fiboENTRY ~n := #in~n; 8640#L6 assume !(~n < 1); 9118#L8 assume !(1 == ~n); 8633#L11 call #t~ret0 := fibo(~n - 1);< 8637#fiboENTRY ~n := #in~n; 8638#L6 assume !(~n < 1); 9103#L8 assume !(1 == ~n); 8634#L11 [2019-11-28 21:16:54,104 INFO L796 eck$LassoCheckResult]: Loop: 8634#L11 call #t~ret0 := fibo(~n - 1);< 8637#fiboENTRY ~n := #in~n; 8638#L6 assume !(~n < 1); 9103#L8 assume !(1 == ~n); 8634#L11 [2019-11-28 21:16:54,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:54,104 INFO L82 PathProgramCache]: Analyzing trace with hash -989900256, now seen corresponding path program 2 times [2019-11-28 21:16:54,105 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 21:16:54,105 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765500476] [2019-11-28 21:16:54,106 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 21:16:54,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:54,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:54,369 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 9 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 21:16:54,370 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765500476] [2019-11-28 21:16:54,370 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970245078] [2019-11-28 21:16:54,370 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 21:16:54,402 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-28 21:16:54,402 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 21:16:54,403 INFO L264 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-28 21:16:54,404 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:54,434 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 64 proven. 55 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-28 21:16:54,434 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 21:16:54,434 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 15] total 23 [2019-11-28 21:16:54,439 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507853131] [2019-11-28 21:16:54,443 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-11-28 21:16:54,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:54,444 INFO L82 PathProgramCache]: Analyzing trace with hash 1863062, now seen corresponding path program 3 times [2019-11-28 21:16:54,444 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 21:16:54,444 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931020982] [2019-11-28 21:16:54,445 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 21:16:54,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 21:16:54,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 21:16:54,454 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 21:16:54,501 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 21:16:54,501 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 21:16:54,501 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 21:16:54,501 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 21:16:54,502 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-28 21:16:54,502 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:54,502 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 21:16:54,502 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 21:16:54,502 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-1.c_Iteration7_Loop [2019-11-28 21:16:54,502 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 21:16:54,502 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 21:16:54,504 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:54,506 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:54,508 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:54,509 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:54,578 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 21:16:54,578 INFO L404 LassoAnalysis]: Checking for nontermination... 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 [2019-11-28 21:16:54,583 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 21:16:54,584 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 21:16:54,591 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 21:16:54,592 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret0=0} Honda state: {fibo_#t~ret0=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 [2019-11-28 21:16:54,597 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 21:16:54,597 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 21:16:54,600 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 21:16:54,600 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret1=0} Honda state: {fibo_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] 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 [2019-11-28 21:16:54,605 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 21:16:54,605 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 21:16:54,609 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 21:16:54,609 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 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 [2019-11-28 21:16:54,615 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 21:16:54,616 INFO L160 nArgumentSynthesizer]: Using integer mode. 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 [2019-11-28 21:16:54,628 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-28 21:16:54,628 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 21:17:00,213 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-28 21:17:00,215 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 21:17:00,215 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 21:17:00,215 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 21:17:00,215 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 21:17:00,215 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-28 21:17:00,215 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:17:00,215 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 21:17:00,216 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 21:17:00,216 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-1.c_Iteration7_Loop [2019-11-28 21:17:00,216 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 21:17:00,216 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 21:17:00,217 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:17:00,218 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:17:00,220 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:17:00,224 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:17:00,294 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 21:17:00,294 INFO L489 LassoAnalysis]: Using template 'affine'. 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 [2019-11-28 21:17:00,300 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 [2019-11-28 21:17:00,302 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 21:17:00,302 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 21:17:00,302 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 21:17:00,302 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 21:17:00,303 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 21:17:00,303 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 21:17:00,303 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 21:17:00,304 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 51 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:17:00,309 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 [2019-11-28 21:17:00,311 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 21:17:00,311 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 21:17:00,312 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 21:17:00,312 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 21:17:00,312 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 21:17:00,312 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 21:17:00,312 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 21:17:00,314 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 52 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:17:00,320 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 [2019-11-28 21:17:00,322 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 21:17:00,322 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 21:17:00,322 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 21:17:00,322 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 21:17:00,323 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 21:17:00,323 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 21:17:00,323 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 21:17:00,324 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 53 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 21:17:00,350 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 [2019-11-28 21:17:00,353 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 21:17:00,353 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. Waiting until toolchain timeout for monitored process 53 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:17:00,354 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 21:17:00,354 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 21:17:00,354 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 21:17:00,357 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 21:17:00,357 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 21:17:00,359 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-28 21:17:00,364 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-28 21:17:00,364 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 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 [2019-11-28 21:17:00,370 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-28 21:17:00,370 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-28 21:17:00,370 INFO L510 LassoAnalysis]: Proved termination. [2019-11-28 21:17:00,370 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2019-11-28 21:17:00,372 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-28 21:17:00,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:17:00,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:17:00,436 INFO L264 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-28 21:17:00,438 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:17:00,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:17:00,468 INFO L264 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 21:17:00,469 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:17:00,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 21:17:00,502 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 [2019-11-28 21:17:00,502 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 541 states and 807 transitions. cyclomatic complexity: 276 Second operand 6 states. [2019-11-28 21:17:00,562 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 541 states and 807 transitions. cyclomatic complexity: 276. Second operand 6 states. Result 556 states and 823 transitions. Complement of second has 18 states. [2019-11-28 21:17:00,563 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2019-11-28 21:17:00,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-11-28 21:17:00,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 12 transitions. [2019-11-28 21:17:00,564 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 12 transitions. Stem has 39 letters. Loop has 4 letters. [2019-11-28 21:17:00,564 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:17:00,564 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-28 21:17:00,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:17:00,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:17:00,628 INFO L264 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-28 21:17:00,630 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:17:00,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:17:00,664 INFO L264 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 21:17:00,665 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:17:00,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 21:17:00,694 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 [2019-11-28 21:17:00,695 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 541 states and 807 transitions. cyclomatic complexity: 276 Second operand 6 states. [2019-11-28 21:17:00,828 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 541 states and 807 transitions. cyclomatic complexity: 276. Second operand 6 states. Result 786 states and 1145 transitions. Complement of second has 22 states. [2019-11-28 21:17:00,829 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2019-11-28 21:17:00,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-11-28 21:17:00,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 15 transitions. [2019-11-28 21:17:00,830 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 15 transitions. Stem has 39 letters. Loop has 4 letters. [2019-11-28 21:17:00,830 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:17:00,830 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 15 transitions. Stem has 43 letters. Loop has 4 letters. [2019-11-28 21:17:00,831 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:17:00,831 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 15 transitions. Stem has 39 letters. Loop has 8 letters. [2019-11-28 21:17:00,831 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:17:00,831 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 786 states and 1145 transitions. [2019-11-28 21:17:00,844 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2019-11-28 21:17:00,858 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 786 states to 719 states and 1073 transitions. [2019-11-28 21:17:00,858 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 241 [2019-11-28 21:17:00,859 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 269 [2019-11-28 21:17:00,859 INFO L73 IsDeterministic]: Start isDeterministic. Operand 719 states and 1073 transitions. [2019-11-28 21:17:00,859 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 21:17:00,860 INFO L688 BuchiCegarLoop]: Abstraction has 719 states and 1073 transitions. [2019-11-28 21:17:00,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states and 1073 transitions. [2019-11-28 21:17:00,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 706. [2019-11-28 21:17:00,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 706 states. [2019-11-28 21:17:00,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706 states to 706 states and 1056 transitions. [2019-11-28 21:17:00,889 INFO L711 BuchiCegarLoop]: Abstraction has 706 states and 1056 transitions. [2019-11-28 21:17:00,889 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 21:17:00,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-28 21:17:00,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2019-11-28 21:17:00,890 INFO L87 Difference]: Start difference. First operand 706 states and 1056 transitions. Second operand 23 states. [2019-11-28 21:17:01,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 21:17:01,688 INFO L93 Difference]: Finished difference Result 1715 states and 3613 transitions. [2019-11-28 21:17:01,688 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-28 21:17:01,689 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1715 states and 3613 transitions. [2019-11-28 21:17:01,717 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 156 [2019-11-28 21:17:01,753 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1715 states to 1469 states and 3094 transitions. [2019-11-28 21:17:01,753 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 506 [2019-11-28 21:17:01,755 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 533 [2019-11-28 21:17:01,755 INFO L73 IsDeterministic]: Start isDeterministic. Operand 1469 states and 3094 transitions. [2019-11-28 21:17:01,755 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 21:17:01,755 INFO L688 BuchiCegarLoop]: Abstraction has 1469 states and 3094 transitions. [2019-11-28 21:17:01,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1469 states and 3094 transitions. [2019-11-28 21:17:01,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1469 to 1302. [2019-11-28 21:17:01,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1302 states. [2019-11-28 21:17:01,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1302 states to 1302 states and 2622 transitions. [2019-11-28 21:17:01,818 INFO L711 BuchiCegarLoop]: Abstraction has 1302 states and 2622 transitions. [2019-11-28 21:17:01,818 INFO L591 BuchiCegarLoop]: Abstraction has 1302 states and 2622 transitions. [2019-11-28 21:17:01,818 INFO L424 BuchiCegarLoop]: ======== Iteration 8============ [2019-11-28 21:17:01,819 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 1302 states and 2622 transitions. [2019-11-28 21:17:01,829 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 147 [2019-11-28 21:17:01,829 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 21:17:01,829 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 21:17:01,830 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [11, 10, 9, 8, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2019-11-28 21:17:01,830 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2019-11-28 21:17:01,831 INFO L794 eck$LassoCheckResult]: Stem: 13394#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 7; 13395#L25 call main_#t~ret2 := fibo(main_~x~0);< 13452#fiboENTRY ~n := #in~n; 13490#L6 assume !(~n < 1); 13489#L8 assume !(1 == ~n); 13485#L11 call #t~ret0 := fibo(~n - 1);< 13488#fiboENTRY ~n := #in~n; 13487#L6 assume !(~n < 1); 13486#L8 assume !(1 == ~n); 13481#L11 call #t~ret0 := fibo(~n - 1);< 13484#fiboENTRY ~n := #in~n; 13483#L6 assume !(~n < 1); 13482#L8 assume !(1 == ~n); 13477#L11 call #t~ret0 := fibo(~n - 1);< 13480#fiboENTRY ~n := #in~n; 13479#L6 assume !(~n < 1); 13478#L8 assume !(1 == ~n); 13434#L11 call #t~ret0 := fibo(~n - 1);< 13476#fiboENTRY ~n := #in~n; 13474#L6 assume !(~n < 1); 13475#L8 assume !(1 == ~n); 13435#L11 call #t~ret0 := fibo(~n - 1);< 13470#fiboENTRY ~n := #in~n; 13471#L6 assume !(~n < 1); 13473#L8 assume !(1 == ~n); 13436#L11 call #t~ret0 := fibo(~n - 1);< 13518#fiboENTRY ~n := #in~n; 13536#L6 assume !(~n < 1); 13533#L8 assume 1 == ~n;#res := 1; 13530#fiboFINAL assume true; 13526#fiboEXIT >#32#return; 13449#L11-1 call #t~ret1 := fibo(~n - 2);< 13469#fiboENTRY ~n := #in~n; 13448#L6 assume ~n < 1;#res := 0; 13450#fiboFINAL assume true; 14576#fiboEXIT >#34#return; 14572#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret0;havoc #t~ret1; 14571#fiboFINAL assume true; 14570#fiboEXIT >#32#return; 14476#L11-1 call #t~ret1 := fibo(~n - 2);< 14494#fiboENTRY ~n := #in~n; 14568#L6 assume !(~n < 1); 14567#L8 assume !(1 == ~n); 13467#L11 call #t~ret0 := fibo(~n - 1);< 14099#fiboENTRY ~n := #in~n; 14098#L6 assume !(~n < 1); 14097#L8 assume !(1 == ~n); 13381#L11 call #t~ret0 := fibo(~n - 1);< 13599#fiboENTRY ~n := #in~n; 14077#L6 assume !(~n < 1); 14075#L8 assume !(1 == ~n); 13383#L11 [2019-11-28 21:17:01,831 INFO L796 eck$LassoCheckResult]: Loop: 13383#L11 call #t~ret0 := fibo(~n - 1);< 13599#fiboENTRY ~n := #in~n; 14077#L6 assume !(~n < 1); 14075#L8 assume !(1 == ~n); 13383#L11 [2019-11-28 21:17:01,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:17:01,831 INFO L82 PathProgramCache]: Analyzing trace with hash 1997475882, now seen corresponding path program 3 times [2019-11-28 21:17:01,832 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 21:17:01,832 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173538362] [2019-11-28 21:17:01,832 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 21:17:01,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:17:02,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:17:02,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:17:02,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:17:02,033 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 129 proven. 47 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-28 21:17:02,034 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173538362] [2019-11-28 21:17:02,034 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137633376] [2019-11-28 21:17:02,034 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 21:17:02,080 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-28 21:17:02,081 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 21:17:02,081 INFO L264 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-28 21:17:02,083 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:17:02,128 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 106 proven. 19 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2019-11-28 21:17:02,128 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 21:17:02,128 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 11] total 22 [2019-11-28 21:17:02,129 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387271697] [2019-11-28 21:17:02,129 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-11-28 21:17:02,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:17:02,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1863062, now seen corresponding path program 4 times [2019-11-28 21:17:02,130 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 21:17:02,130 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978639184] [2019-11-28 21:17:02,130 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 21:17:02,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 21:17:02,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 21:17:02,134 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 21:17:02,175 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 21:17:02,175 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 21:17:02,175 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 21:17:02,175 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 21:17:02,176 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-28 21:17:02,176 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:17:02,176 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 21:17:02,176 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 21:17:02,176 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-1.c_Iteration8_Loop [2019-11-28 21:17:02,176 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 21:17:02,176 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 21:17:02,178 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:17:02,186 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:17:02,187 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:17:02,189 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:17:02,238 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 21:17:02,238 INFO L404 LassoAnalysis]: Checking for nontermination... 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 [2019-11-28 21:17:02,245 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 21:17:02,245 INFO L160 nArgumentSynthesizer]: Using integer mode. 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 [2019-11-28 21:17:02,257 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-28 21:17:02,257 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 21:17:04,955 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-28 21:17:04,957 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 21:17:04,957 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 21:17:04,957 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 21:17:04,957 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 21:17:04,958 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-28 21:17:04,958 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:17:04,958 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 21:17:04,958 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 21:17:04,958 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-1.c_Iteration8_Loop [2019-11-28 21:17:04,958 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 21:17:04,958 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 21:17:04,959 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:17:04,960 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:17:04,961 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:17:04,962 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:17:05,017 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 21:17:05,017 INFO L489 LassoAnalysis]: Using template 'affine'. 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) [2019-11-28 21:17:05,023 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 [2019-11-28 21:17:05,025 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 21:17:05,025 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 21:17:05,026 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 21:17:05,026 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 21:17:05,026 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 21:17:05,027 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 21:17:05,027 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 58 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:17:05,029 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:17:05,036 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 [2019-11-28 21:17:05,038 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 21:17:05,038 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 21:17:05,038 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 21:17:05,038 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 21:17:05,038 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 21:17:05,038 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 21:17:05,038 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 21:17:05,040 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:17:05,045 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 [2019-11-28 21:17:05,047 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 21:17:05,047 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 21:17:05,047 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 21:17:05,047 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 21:17:05,047 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 21:17:05,049 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 21:17:05,049 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 21:17:05,051 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 21:17:05,057 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 [2019-11-28 21:17:05,058 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 21:17:05,059 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 21:17:05,059 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 21:17:05,059 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 21:17:05,059 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 21:17:05,060 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 21:17:05,060 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 61 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:17:05,063 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-28 21:17:05,066 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-28 21:17:05,066 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 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 [2019-11-28 21:17:05,075 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-28 21:17:05,075 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-28 21:17:05,075 INFO L510 LassoAnalysis]: Proved termination. [2019-11-28 21:17:05,076 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2019-11-28 21:17:05,077 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-28 21:17:05,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:17:05,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:17:05,143 INFO L264 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-28 21:17:05,145 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:17:05,163 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 21:17:05,164 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 21:17:05,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:17:05,178 INFO L264 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 21:17:05,178 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:17:05,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 21:17:05,201 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 [2019-11-28 21:17:05,202 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 1302 states and 2622 transitions. cyclomatic complexity: 1333 Second operand 6 states. [2019-11-28 21:17:05,281 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 1302 states and 2622 transitions. cyclomatic complexity: 1333. Second operand 6 states. Result 1324 states and 2645 transitions. Complement of second has 18 states. [2019-11-28 21:17:05,282 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2019-11-28 21:17:05,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-11-28 21:17:05,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 12 transitions. [2019-11-28 21:17:05,283 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 12 transitions. Stem has 51 letters. Loop has 4 letters. [2019-11-28 21:17:05,283 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:17:05,283 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-28 21:17:05,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:17:05,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:17:05,361 INFO L264 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-28 21:17:05,363 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:17:05,388 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 21:17:05,392 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 21:17:05,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:17:05,406 INFO L264 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 21:17:05,407 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:17:05,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 21:17:05,444 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 [2019-11-28 21:17:05,444 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 1302 states and 2622 transitions. cyclomatic complexity: 1333 Second operand 6 states. [2019-11-28 21:17:05,577 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 1302 states and 2622 transitions. cyclomatic complexity: 1333. Second operand 6 states. Result 1505 states and 2854 transitions. Complement of second has 22 states. [2019-11-28 21:17:05,578 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2019-11-28 21:17:05,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-11-28 21:17:05,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 15 transitions. [2019-11-28 21:17:05,579 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 15 transitions. Stem has 51 letters. Loop has 4 letters. [2019-11-28 21:17:05,579 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:17:05,580 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-28 21:17:05,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:17:05,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:17:05,648 INFO L264 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-28 21:17:05,650 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:17:05,688 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 21:17:05,690 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 21:17:05,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:17:05,702 INFO L264 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 21:17:05,702 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:17:05,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 21:17:05,815 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 [2019-11-28 21:17:05,815 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 1302 states and 2622 transitions. cyclomatic complexity: 1333 Second operand 6 states. [2019-11-28 21:17:05,903 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 1302 states and 2622 transitions. cyclomatic complexity: 1333. Second operand 6 states. Result 1635 states and 3078 transitions. Complement of second has 27 states. [2019-11-28 21:17:05,903 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2019-11-28 21:17:05,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-11-28 21:17:05,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 21 transitions. [2019-11-28 21:17:05,904 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 51 letters. Loop has 4 letters. [2019-11-28 21:17:05,904 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:17:05,905 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 55 letters. Loop has 4 letters. [2019-11-28 21:17:05,905 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:17:05,906 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 51 letters. Loop has 8 letters. [2019-11-28 21:17:05,906 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:17:05,906 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1635 states and 3078 transitions. [2019-11-28 21:17:05,931 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 147 [2019-11-28 21:17:05,965 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1635 states to 1302 states and 2622 transitions. [2019-11-28 21:17:05,965 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 411 [2019-11-28 21:17:05,967 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 447 [2019-11-28 21:17:05,967 INFO L73 IsDeterministic]: Start isDeterministic. Operand 1302 states and 2622 transitions. [2019-11-28 21:17:05,968 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 21:17:05,968 INFO L688 BuchiCegarLoop]: Abstraction has 1302 states and 2622 transitions. [2019-11-28 21:17:05,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1302 states and 2622 transitions. [2019-11-28 21:17:06,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1302 to 1302. [2019-11-28 21:17:06,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1302 states. [2019-11-28 21:17:06,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1302 states to 1302 states and 2622 transitions. [2019-11-28 21:17:06,038 INFO L711 BuchiCegarLoop]: Abstraction has 1302 states and 2622 transitions. [2019-11-28 21:17:06,039 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 21:17:06,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-28 21:17:06,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2019-11-28 21:17:06,039 INFO L87 Difference]: Start difference. First operand 1302 states and 2622 transitions. Second operand 22 states. [2019-11-28 21:17:06,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 21:17:06,414 INFO L93 Difference]: Finished difference Result 400 states and 513 transitions. [2019-11-28 21:17:06,415 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-28 21:17:06,415 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 400 states and 513 transitions. [2019-11-28 21:17:06,419 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2019-11-28 21:17:06,420 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 400 states to 0 states and 0 transitions. [2019-11-28 21:17:06,420 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2019-11-28 21:17:06,420 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2019-11-28 21:17:06,420 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2019-11-28 21:17:06,420 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2019-11-28 21:17:06,420 INFO L688 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-28 21:17:06,421 INFO L711 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-28 21:17:06,421 INFO L591 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-28 21:17:06,421 INFO L424 BuchiCegarLoop]: ======== Iteration 9============ [2019-11-28 21:17:06,421 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2019-11-28 21:17:06,421 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2019-11-28 21:17:06,422 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2019-11-28 21:17:06,429 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 28.11 09:17:06 BoogieIcfgContainer [2019-11-28 21:17:06,430 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2019-11-28 21:17:06,431 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-28 21:17:06,431 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-28 21:17:06,432 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-28 21:17:06,432 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 09:16:45" (3/4) ... [2019-11-28 21:17:06,437 INFO L140 WitnessPrinter]: No result that supports witness generation found [2019-11-28 21:17:06,438 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-28 21:17:06,441 INFO L168 Benchmark]: Toolchain (without parser) took 22056.86 ms. Allocated memory was 1.0 GB in the beginning and 1.4 GB in the end (delta: 376.4 MB). Free memory was 956.3 MB in the beginning and 1.2 GB in the end (delta: -290.1 MB). Peak memory consumption was 86.4 MB. Max. memory is 11.5 GB. [2019-11-28 21:17:06,442 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 1.0 GB. Free memory is still 987.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 21:17:06,443 INFO L168 Benchmark]: CACSL2BoogieTranslator took 283.77 ms. Allocated memory is still 1.0 GB. Free memory was 956.3 MB in the beginning and 945.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-11-28 21:17:06,443 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.40 ms. Allocated memory is still 1.0 GB. Free memory is still 945.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 21:17:06,444 INFO L168 Benchmark]: Boogie Preprocessor took 103.80 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 142.1 MB). Free memory was 945.6 MB in the beginning and 1.1 GB in the end (delta: -192.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. [2019-11-28 21:17:06,446 INFO L168 Benchmark]: RCFGBuilder took 242.00 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 24.9 MB). Peak memory consumption was 24.9 MB. Max. memory is 11.5 GB. [2019-11-28 21:17:06,454 INFO L168 Benchmark]: BuchiAutomizer took 21374.46 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 234.4 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -133.0 MB). Peak memory consumption was 101.4 MB. Max. memory is 11.5 GB. [2019-11-28 21:17:06,455 INFO L168 Benchmark]: Witness Printer took 6.75 ms. Allocated memory is still 1.4 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 21:17:06,462 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 1.0 GB. Free memory is still 987.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 283.77 ms. Allocated memory is still 1.0 GB. Free memory was 956.3 MB in the beginning and 945.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 40.40 ms. Allocated memory is still 1.0 GB. Free memory is still 945.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 103.80 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 142.1 MB). Free memory was 945.6 MB in the beginning and 1.1 GB in the end (delta: -192.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 242.00 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 24.9 MB). Peak memory consumption was 24.9 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 21374.46 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 234.4 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -133.0 MB). Peak memory consumption was 101.4 MB. Max. memory is 11.5 GB. * Witness Printer took 6.75 ms. Allocated memory is still 1.4 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 13 terminating modules (7 trivial, 3 deterministic, 3 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 7 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. 7 modules have a trivial ranking function, the largest among these consists of 23 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 21.3s and 9 iterations. TraceHistogramMax:11. Analysis of lassos took 14.0s. Construction of modules took 1.9s. Büchi inclusion checks took 4.3s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 12. Automata minimization 0.3s AutomataMinimizationTime, 12 MinimizatonAttempts, 442 StatesRemovedByMinimization, 9 NontrivialMinimizations. Non-live state removal took 0.3s Buchi closure took 0.0s. Biggest automaton had 1302 states and ocurred in iteration 7. Nontrivial modules had stage [2, 1, 3, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 10/26 HoareTripleCheckerStatistics: 242 SDtfs, 659 SDslu, 475 SDs, 0 SdLazy, 1881 SolverSat, 522 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.9s Time LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT1 conc0 concLT0 SILN0 SILU0 SILI2 SILT5 lasso0 LassoPreprocessingBenchmarks: Lassos: inital17 mio100 ax100 hnf98 lsp94 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq180 hnf93 smp78 dnf100 smp100 tf109 neg96 sie109 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 33ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 13 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 6 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 9.6s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...