./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/recursive-simple/fibo_7-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 30f4e4ab 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_7-2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(F end) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 16ceff9c26892934dc007d0ff3b64a1ad7cbb0e9 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-30f4e4a [2019-11-28 03:44:18,724 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-28 03:44:18,726 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-28 03:44:18,745 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-28 03:44:18,746 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-28 03:44:18,748 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-28 03:44:18,750 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-28 03:44:18,760 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-28 03:44:18,766 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-28 03:44:18,770 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-28 03:44:18,771 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-28 03:44:18,774 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-28 03:44:18,774 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-28 03:44:18,777 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-28 03:44:18,779 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-28 03:44:18,780 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-28 03:44:18,782 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-28 03:44:18,783 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-28 03:44:18,785 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-28 03:44:18,789 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-28 03:44:18,793 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-28 03:44:18,798 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-28 03:44:18,799 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-28 03:44:18,801 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-28 03:44:18,803 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-28 03:44:18,804 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-28 03:44:18,804 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-28 03:44:18,806 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-28 03:44:18,806 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-28 03:44:18,807 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-28 03:44:18,808 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-28 03:44:18,808 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-28 03:44:18,809 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-28 03:44:18,811 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-28 03:44:18,812 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-28 03:44:18,812 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-28 03:44:18,814 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-28 03:44:18,814 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-28 03:44:18,814 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-28 03:44:18,815 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-28 03:44:18,817 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-28 03:44:18,818 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-32bit-Automizer_Default.epf [2019-11-28 03:44:18,854 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-28 03:44:18,859 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-28 03:44:18,862 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-28 03:44:18,862 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-28 03:44:18,862 INFO L138 SettingsManager]: * Use SBE=true [2019-11-28 03:44:18,863 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2019-11-28 03:44:18,863 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2019-11-28 03:44:18,863 INFO L138 SettingsManager]: * Use old map elimination=false [2019-11-28 03:44:18,863 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2019-11-28 03:44:18,864 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2019-11-28 03:44:18,864 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2019-11-28 03:44:18,865 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-28 03:44:18,865 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-28 03:44:18,866 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-28 03:44:18,866 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-28 03:44:18,866 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-28 03:44:18,866 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-28 03:44:18,867 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2019-11-28 03:44:18,867 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2019-11-28 03:44:18,867 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2019-11-28 03:44:18,868 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-28 03:44:18,868 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-28 03:44:18,868 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2019-11-28 03:44:18,869 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-28 03:44:18,869 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2019-11-28 03:44:18,869 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-28 03:44:18,870 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-28 03:44:18,870 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2019-11-28 03:44:18,871 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-28 03:44:18,871 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-28 03:44:18,871 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2019-11-28 03:44:18,873 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2019-11-28 03:44:18,873 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 -> 16ceff9c26892934dc007d0ff3b64a1ad7cbb0e9 [2019-11-28 03:44:19,185 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-28 03:44:19,200 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-28 03:44:19,206 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-28 03:44:19,208 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-28 03:44:19,208 INFO L275 PluginConnector]: CDTParser initialized [2019-11-28 03:44:19,209 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/fibo_7-2.c [2019-11-28 03:44:19,283 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c0aeec1bd/312f96e6e38a4a0f88bd5d2e57370451/FLAG40a2e4ff9 [2019-11-28 03:44:19,748 INFO L306 CDTParser]: Found 1 translation units. [2019-11-28 03:44:19,749 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_7-2.c [2019-11-28 03:44:19,756 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c0aeec1bd/312f96e6e38a4a0f88bd5d2e57370451/FLAG40a2e4ff9 [2019-11-28 03:44:20,104 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c0aeec1bd/312f96e6e38a4a0f88bd5d2e57370451 [2019-11-28 03:44:20,108 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-28 03:44:20,110 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-28 03:44:20,114 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-28 03:44:20,114 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-28 03:44:20,118 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-28 03:44:20,120 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:44:20" (1/1) ... [2019-11-28 03:44:20,123 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@477caf30 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:44:20, skipping insertion in model container [2019-11-28 03:44:20,123 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:44:20" (1/1) ... [2019-11-28 03:44:20,132 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-28 03:44:20,155 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-28 03:44:20,423 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 03:44:20,432 INFO L203 MainTranslator]: Completed pre-run [2019-11-28 03:44:20,457 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 03:44:20,473 INFO L208 MainTranslator]: Completed translation [2019-11-28 03:44:20,474 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:44:20 WrapperNode [2019-11-28 03:44:20,474 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-28 03:44:20,477 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-28 03:44:20,477 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-28 03:44:20,477 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-28 03:44:20,488 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:44:20" (1/1) ... [2019-11-28 03:44:20,495 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:44:20" (1/1) ... [2019-11-28 03:44:20,519 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-28 03:44:20,519 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-28 03:44:20,519 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-28 03:44:20,520 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-28 03:44:20,629 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:44:20" (1/1) ... [2019-11-28 03:44:20,631 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:44:20" (1/1) ... [2019-11-28 03:44:20,632 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:44:20" (1/1) ... [2019-11-28 03:44:20,632 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:44:20" (1/1) ... [2019-11-28 03:44:20,639 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:44:20" (1/1) ... [2019-11-28 03:44:20,642 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:44:20" (1/1) ... [2019-11-28 03:44:20,643 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:44:20" (1/1) ... [2019-11-28 03:44:20,645 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-28 03:44:20,646 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-28 03:44:20,646 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-28 03:44:20,647 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-28 03:44:20,648 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:44:20" (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 03:44:20,719 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-28 03:44:20,720 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-28 03:44:20,720 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2019-11-28 03:44:20,720 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2019-11-28 03:44:20,918 INFO L292 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-28 03:44:20,918 INFO L297 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-28 03:44:20,920 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:44:20 BoogieIcfgContainer [2019-11-28 03:44:20,920 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-28 03:44:20,921 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2019-11-28 03:44:20,921 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2019-11-28 03:44:20,925 INFO L275 PluginConnector]: BuchiAutomizer initialized [2019-11-28 03:44:20,926 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-28 03:44:20,926 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 28.11 03:44:20" (1/3) ... [2019-11-28 03:44:20,928 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@87333a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 28.11 03:44:20, skipping insertion in model container [2019-11-28 03:44:20,928 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-28 03:44:20,928 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:44:20" (2/3) ... [2019-11-28 03:44:20,929 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@87333a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 28.11 03:44:20, skipping insertion in model container [2019-11-28 03:44:20,929 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-28 03:44:20,929 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:44:20" (3/3) ... [2019-11-28 03:44:20,931 INFO L371 chiAutomizerObserver]: Analyzing ICFG fibo_7-2.c [2019-11-28 03:44:20,986 INFO L356 BuchiCegarLoop]: Interprodecural is true [2019-11-28 03:44:20,987 INFO L357 BuchiCegarLoop]: Hoare is false [2019-11-28 03:44:20,987 INFO L358 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2019-11-28 03:44:20,987 INFO L359 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-28 03:44:20,987 INFO L360 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-28 03:44:20,988 INFO L361 BuchiCegarLoop]: Difference is false [2019-11-28 03:44:20,988 INFO L362 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-28 03:44:20,988 INFO L365 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2019-11-28 03:44:21,007 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 17 states. [2019-11-28 03:44:21,046 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-11-28 03:44:21,046 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 03:44:21,046 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 03:44:21,056 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2019-11-28 03:44:21,056 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2019-11-28 03:44:21,057 INFO L424 BuchiCegarLoop]: ======== Iteration 1============ [2019-11-28 03:44:21,057 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 17 states. [2019-11-28 03:44:21,061 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-11-28 03:44:21,062 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 03:44:21,062 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 03:44:21,064 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2019-11-28 03:44:21,064 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2019-11-28 03:44:21,074 INFO L794 eck$LassoCheckResult]: Stem: 8#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 7; 19#L25true call main_#t~ret2 := fibo(main_~x~0);< 11#fiboENTRYtrue [2019-11-28 03:44:21,075 INFO L796 eck$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 03:44:21,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:44:21,084 INFO L82 PathProgramCache]: Analyzing trace with hash 1021, now seen corresponding path program 1 times [2019-11-28 03:44:21,094 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 03:44:21,097 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168427544] [2019-11-28 03:44:21,098 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 03:44:21,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 03:44:21,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 03:44:21,206 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 03:44:21,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:44:21,208 INFO L82 PathProgramCache]: Analyzing trace with hash 1420172, now seen corresponding path program 1 times [2019-11-28 03:44:21,208 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 03:44:21,208 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389790801] [2019-11-28 03:44:21,209 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 03:44:21,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 03:44:21,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 03:44:21,223 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 03:44:21,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:44:21,225 INFO L82 PathProgramCache]: Analyzing trace with hash 943411592, now seen corresponding path program 1 times [2019-11-28 03:44:21,225 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 03:44:21,226 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153415250] [2019-11-28 03:44:21,226 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 03:44:21,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 03:44:21,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 03:44:21,241 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 03:44:21,407 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 03:44:21,408 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 03:44:21,410 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 03:44:21,410 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 03:44:21,410 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-28 03:44:21,412 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:21,412 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 03:44:21,412 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 03:44:21,413 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-2.c_Iteration1_Loop [2019-11-28 03:44:21,415 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 03:44:21,415 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 03:44:21,443 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 03:44:21,455 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 03:44:21,462 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 03:44:21,467 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 03:44:21,477 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 03:44:21,602 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 03:44:21,603 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 03:44:21,613 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 03:44:21,613 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 03:44:21,625 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 03:44:21,625 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 03:44:21,647 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 03:44:21,647 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 03:44:21,653 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 03:44:21,653 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 03:44:21,674 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 03:44:21,674 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 03:44:21,680 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 03:44:21,681 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) [2019-11-28 03:44:21,694 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 03:44:21,695 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:21,699 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 03:44:21,699 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret1=0} Honda state: {fibo_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [MP z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] 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 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 03:44:21,710 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 03:44:21,715 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 03:44:21,728 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-28 03:44:21,728 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 03:44:21,739 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-28 03:44:21,749 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 03:44:21,749 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 03:44:21,750 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 03:44:21,750 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 03:44:21,750 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-28 03:44:21,750 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:21,750 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 03:44:21,750 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 03:44:21,750 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-2.c_Iteration1_Loop [2019-11-28 03:44:21,751 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 03:44:21,751 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 03:44:21,753 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 03:44:21,756 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 03:44:21,765 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 03:44:21,771 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 03:44:21,775 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 03:44:21,893 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 03:44:21,899 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 03:44:21,906 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 03:44:21,909 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 03:44:21,909 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 03:44:21,910 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 03:44:21,911 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 03:44:21,911 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 03:44:21,914 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 03:44:21,914 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 03:44:21,917 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) [2019-11-28 03:44:21,932 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 03:44:21,934 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 03:44:21,934 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 03:44:21,935 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 03:44:21,935 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 03:44:21,935 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 03:44:21,936 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 03:44:21,936 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 03:44:21,938 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. Waiting until toolchain timeout for monitored process 9 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 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:21,956 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 03:44:21,958 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 03:44:21,958 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 03:44:21,958 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 03:44:21,958 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 03:44:21,959 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 03:44:21,961 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 03:44:21,961 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 03:44:21,967 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 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:21,985 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 03:44:21,987 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 03:44:21,987 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 03:44:21,987 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 03:44:21,987 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 03:44:21,988 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 03:44:21,989 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 03:44:21,990 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 03:44:21,994 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:22,009 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 03:44:22,011 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 03:44:22,011 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 03:44:22,012 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 03:44:22,012 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 03:44:22,012 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 03:44:22,014 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 03:44:22,014 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 03:44:22,018 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-28 03:44:22,023 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-28 03:44:22,024 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 03:44:22,033 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-28 03:44:22,034 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-28 03:44:22,034 INFO L510 LassoAnalysis]: Proved termination. [2019-11-28 03:44:22,035 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_#in~n) = 1*fibo_#in~n Supporting invariants [] Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:22,049 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-28 03:44:22,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:44:22,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:22,106 INFO L255 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-28 03:44:22,108 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:22,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:22,130 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 03:44:22,131 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:22,167 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 03:44:22,186 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 03:44:22,188 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 17 states. Second operand 4 states. [2019-11-28 03:44:22,342 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 03:44:22,343 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 03:44:22,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2019-11-28 03:44:22,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 10 transitions. [2019-11-28 03:44:22,350 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 2 letters. Loop has 4 letters. [2019-11-28 03:44:22,352 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:44:22,352 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 6 letters. Loop has 4 letters. [2019-11-28 03:44:22,353 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:44:22,353 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 2 letters. Loop has 8 letters. [2019-11-28 03:44:22,353 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:44:22,355 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 47 states and 59 transitions. [2019-11-28 03:44:22,360 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-11-28 03:44:22,370 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 47 states to 24 states and 33 transitions. [2019-11-28 03:44:22,372 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 16 [2019-11-28 03:44:22,373 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 17 [2019-11-28 03:44:22,374 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 33 transitions. [2019-11-28 03:44:22,376 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 03:44:22,376 INFO L688 BuchiCegarLoop]: Abstraction has 24 states and 33 transitions. [2019-11-28 03:44:22,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states and 33 transitions. [2019-11-28 03:44:22,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 19. [2019-11-28 03:44:22,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-11-28 03:44:22,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2019-11-28 03:44:22,416 INFO L711 BuchiCegarLoop]: Abstraction has 19 states and 25 transitions. [2019-11-28 03:44:22,416 INFO L591 BuchiCegarLoop]: Abstraction has 19 states and 25 transitions. [2019-11-28 03:44:22,416 INFO L424 BuchiCegarLoop]: ======== Iteration 2============ [2019-11-28 03:44:22,417 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 19 states and 25 transitions. [2019-11-28 03:44:22,418 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-11-28 03:44:22,418 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 03:44:22,419 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 03:44:22,420 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 03:44:22,420 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 03:44:22,421 INFO L794 eck$LassoCheckResult]: Stem: 120#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 7; 121#L25 call main_#t~ret2 := fibo(main_~x~0);< 125#fiboENTRY ~n := #in~n; 126#L6 assume !(~n < 1); 124#L8 assume !(1 == ~n); 118#L11 call #t~ret0 := fibo(~n - 1);< 127#fiboENTRY ~n := #in~n; 128#L6 assume ~n < 1;#res := 0; 123#fiboFINAL assume true; 117#fiboEXIT >#32#return; 119#L11-1 [2019-11-28 03:44:22,421 INFO L796 eck$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 03:44:22,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:44:22,422 INFO L82 PathProgramCache]: Analyzing trace with hash 531553871, now seen corresponding path program 1 times [2019-11-28 03:44:22,422 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 03:44:22,423 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742637296] [2019-11-28 03:44:22,423 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 03:44:22,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:22,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:22,539 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 03:44:22,540 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742637296] [2019-11-28 03:44:22,541 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507266309] [2019-11-28 03:44:22,541 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) [2019-11-28 03:44:22,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 03:44:22,577 INFO L255 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-28 03:44:22,579 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:22,606 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 03:44:22,607 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 03:44:22,607 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-11-28 03:44:22,611 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300551188] [2019-11-28 03:44:22,617 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-11-28 03:44:22,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:44:22,618 INFO L82 PathProgramCache]: Analyzing trace with hash -606345326, now seen corresponding path program 1 times [2019-11-28 03:44:22,618 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 03:44:22,619 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392994947] [2019-11-28 03:44:22,620 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 03:44:22,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:22,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:22,712 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-28 03:44:22,712 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392994947] [2019-11-28 03:44:22,713 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 03:44:22,713 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-28 03:44:22,713 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248899953] [2019-11-28 03:44:22,714 INFO L811 eck$LassoCheckResult]: loop already infeasible [2019-11-28 03:44:22,714 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 03:44:22,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-28 03:44:22,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-11-28 03:44:22,719 INFO L87 Difference]: Start difference. First operand 19 states and 25 transitions. cyclomatic complexity: 8 Second operand 6 states. [2019-11-28 03:44:22,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 03:44:22,825 INFO L93 Difference]: Finished difference Result 25 states and 31 transitions. [2019-11-28 03:44:22,825 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-28 03:44:22,826 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 25 states and 31 transitions. [2019-11-28 03:44:22,828 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-11-28 03:44:22,830 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 25 states to 23 states and 29 transitions. [2019-11-28 03:44:22,830 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 19 [2019-11-28 03:44:22,830 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 19 [2019-11-28 03:44:22,831 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 29 transitions. [2019-11-28 03:44:22,831 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 03:44:22,831 INFO L688 BuchiCegarLoop]: Abstraction has 23 states and 29 transitions. [2019-11-28 03:44:22,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states and 29 transitions. [2019-11-28 03:44:22,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-11-28 03:44:22,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-28 03:44:22,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2019-11-28 03:44:22,836 INFO L711 BuchiCegarLoop]: Abstraction has 23 states and 29 transitions. [2019-11-28 03:44:22,836 INFO L591 BuchiCegarLoop]: Abstraction has 23 states and 29 transitions. [2019-11-28 03:44:22,836 INFO L424 BuchiCegarLoop]: ======== Iteration 3============ [2019-11-28 03:44:22,837 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 23 states and 29 transitions. [2019-11-28 03:44:22,838 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-11-28 03:44:22,838 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 03:44:22,838 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 03:44:22,839 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 03:44:22,839 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1] [2019-11-28 03:44:22,839 INFO L794 eck$LassoCheckResult]: Stem: 220#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 7; 221#L25 call main_#t~ret2 := fibo(main_~x~0);< 225#fiboENTRY ~n := #in~n; 226#L6 assume !(~n < 1); 224#L8 assume !(1 == ~n); 218#L11 call #t~ret0 := fibo(~n - 1);< 227#fiboENTRY ~n := #in~n; 228#L6 assume !(~n < 1); 222#L8 assume 1 == ~n;#res := 1; 223#fiboFINAL assume true; 217#fiboEXIT >#32#return; 219#L11-1 [2019-11-28 03:44:22,840 INFO L796 eck$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 03:44:22,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:44:22,840 INFO L82 PathProgramCache]: Analyzing trace with hash -701674289, now seen corresponding path program 1 times [2019-11-28 03:44:22,840 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 03:44:22,841 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160116629] [2019-11-28 03:44:22,841 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 03:44:22,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:22,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:22,904 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 03:44:22,904 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160116629] [2019-11-28 03:44:22,904 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103168888] [2019-11-28 03:44:22,905 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 03:44:22,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:22,931 INFO L255 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-28 03:44:22,933 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:22,952 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 03:44:22,953 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 03:44:22,953 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-11-28 03:44:22,953 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798401983] [2019-11-28 03:44:22,954 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-11-28 03:44:22,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:44:22,955 INFO L82 PathProgramCache]: Analyzing trace with hash -1616811028, now seen corresponding path program 1 times [2019-11-28 03:44:22,955 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 03:44:22,955 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619464474] [2019-11-28 03:44:22,955 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 03:44:22,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 03:44:22,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 03:44:22,969 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 03:44:23,112 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 03:44:23,112 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 03:44:23,112 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 03:44:23,112 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 03:44:23,112 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-28 03:44:23,113 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:23,113 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 03:44:23,113 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 03:44:23,113 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-2.c_Iteration3_Loop [2019-11-28 03:44:23,113 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 03:44:23,113 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 03:44:23,115 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 03:44:23,125 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 03:44:23,138 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 03:44:23,140 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 03:44:23,196 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 03:44:23,197 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 03:44:23,203 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 03:44:23,203 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 03:44:23,218 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-28 03:44:23,218 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 03:44:23,794 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-28 03:44:23,796 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 03:44:23,796 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 03:44:23,796 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 03:44:23,796 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 03:44:23,797 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-28 03:44:23,797 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:23,797 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 03:44:23,797 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 03:44:23,797 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-2.c_Iteration3_Loop [2019-11-28 03:44:23,797 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 03:44:23,798 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 03:44:23,799 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 03:44:23,808 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 03:44:23,815 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 03:44:23,816 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 03:44:23,850 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 03:44:23,850 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 03:44:23,869 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 03:44:23,872 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 03:44:23,872 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 03:44:23,873 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 03:44:23,873 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 03:44:23,873 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 03:44:23,874 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 03:44:23,874 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 03:44:23,876 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 03:44:23,887 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 03:44:23,889 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 03:44:23,889 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 03:44:23,889 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 03:44:23,889 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 03:44:23,890 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 03:44:23,894 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 03:44:23,894 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 03:44:23,897 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-28 03:44:23,901 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-28 03:44:23,901 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 03:44:23,916 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-28 03:44:23,916 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-28 03:44:23,916 INFO L510 LassoAnalysis]: Proved termination. [2019-11-28 03:44:23,916 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 03:44:23,919 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-28 03:44:23,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:44:23,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:23,959 INFO L255 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-28 03:44:23,962 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:24,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:24,018 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-28 03:44:24,019 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:24,088 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 03:44:24,089 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 03:44:24,089 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 23 states and 29 transitions. cyclomatic complexity: 8 Second operand 7 states. [2019-11-28 03:44:24,299 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 03:44:24,299 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 03:44:24,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2019-11-28 03:44:24,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 34 transitions. [2019-11-28 03:44:24,301 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 34 transitions. Stem has 11 letters. Loop has 10 letters. [2019-11-28 03:44:24,302 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:44:24,302 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 34 transitions. Stem has 21 letters. Loop has 10 letters. [2019-11-28 03:44:24,302 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:44:24,303 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 34 transitions. Stem has 11 letters. Loop has 20 letters. [2019-11-28 03:44:24,303 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:44:24,304 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 134 states and 182 transitions. [2019-11-28 03:44:24,312 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2019-11-28 03:44:24,318 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 134 states to 107 states and 151 transitions. [2019-11-28 03:44:24,319 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 63 [2019-11-28 03:44:24,320 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 68 [2019-11-28 03:44:24,320 INFO L73 IsDeterministic]: Start isDeterministic. Operand 107 states and 151 transitions. [2019-11-28 03:44:24,320 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 03:44:24,320 INFO L688 BuchiCegarLoop]: Abstraction has 107 states and 151 transitions. [2019-11-28 03:44:24,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states and 151 transitions. [2019-11-28 03:44:24,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 93. [2019-11-28 03:44:24,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-11-28 03:44:24,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 125 transitions. [2019-11-28 03:44:24,338 INFO L711 BuchiCegarLoop]: Abstraction has 93 states and 125 transitions. [2019-11-28 03:44:24,338 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 03:44:24,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-28 03:44:24,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2019-11-28 03:44:24,339 INFO L87 Difference]: Start difference. First operand 93 states and 125 transitions. Second operand 8 states. [2019-11-28 03:44:24,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 03:44:24,482 INFO L93 Difference]: Finished difference Result 108 states and 146 transitions. [2019-11-28 03:44:24,484 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-28 03:44:24,484 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 108 states and 146 transitions. [2019-11-28 03:44:24,488 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2019-11-28 03:44:24,496 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 108 states to 105 states and 143 transitions. [2019-11-28 03:44:24,497 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 68 [2019-11-28 03:44:24,497 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 68 [2019-11-28 03:44:24,497 INFO L73 IsDeterministic]: Start isDeterministic. Operand 105 states and 143 transitions. [2019-11-28 03:44:24,498 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 03:44:24,498 INFO L688 BuchiCegarLoop]: Abstraction has 105 states and 143 transitions. [2019-11-28 03:44:24,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states and 143 transitions. [2019-11-28 03:44:24,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 93. [2019-11-28 03:44:24,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-11-28 03:44:24,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 124 transitions. [2019-11-28 03:44:24,512 INFO L711 BuchiCegarLoop]: Abstraction has 93 states and 124 transitions. [2019-11-28 03:44:24,512 INFO L591 BuchiCegarLoop]: Abstraction has 93 states and 124 transitions. [2019-11-28 03:44:24,513 INFO L424 BuchiCegarLoop]: ======== Iteration 4============ [2019-11-28 03:44:24,513 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 93 states and 124 transitions. [2019-11-28 03:44:24,515 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2019-11-28 03:44:24,515 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 03:44:24,515 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 03:44:24,517 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [5, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 03:44:24,518 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [6, 5, 5, 3, 3, 3, 3, 2, 2, 2, 1] [2019-11-28 03:44:24,518 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 03:44:24,518 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 03:44:24,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:44:24,519 INFO L82 PathProgramCache]: Analyzing trace with hash -240562386, now seen corresponding path program 1 times [2019-11-28 03:44:24,519 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 03:44:24,519 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922103300] [2019-11-28 03:44:24,520 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 03:44:24,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:24,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:24,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:24,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:24,672 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 03:44:24,672 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922103300] [2019-11-28 03:44:24,672 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506867825] [2019-11-28 03:44:24,672 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 03:44:24,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:24,696 INFO L255 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-28 03:44:24,699 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:24,720 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 03:44:24,720 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 03:44:24,721 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2019-11-28 03:44:24,721 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264075410] [2019-11-28 03:44:24,721 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-11-28 03:44:24,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:44:24,722 INFO L82 PathProgramCache]: Analyzing trace with hash 1408722332, now seen corresponding path program 1 times [2019-11-28 03:44:24,722 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 03:44:24,722 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705452480] [2019-11-28 03:44:24,722 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 03:44:24,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:24,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:24,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:24,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:24,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:24,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:24,849 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 03:44:24,851 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705452480] [2019-11-28 03:44:24,852 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113077935] [2019-11-28 03:44:24,853 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 03:44:24,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:24,894 INFO L255 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-28 03:44:24,895 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:24,921 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 03:44:24,921 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 03:44:24,921 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2019-11-28 03:44:24,922 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091730809] [2019-11-28 03:44:24,922 INFO L811 eck$LassoCheckResult]: loop already infeasible [2019-11-28 03:44:24,922 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 03:44:24,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-28 03:44:24,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2019-11-28 03:44:24,923 INFO L87 Difference]: Start difference. First operand 93 states and 124 transitions. cyclomatic complexity: 36 Second operand 12 states. [2019-11-28 03:44:25,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 03:44:25,174 INFO L93 Difference]: Finished difference Result 115 states and 157 transitions. [2019-11-28 03:44:25,175 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-28 03:44:25,175 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 115 states and 157 transitions. [2019-11-28 03:44:25,179 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 15 [2019-11-28 03:44:25,186 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 115 states to 113 states and 155 transitions. [2019-11-28 03:44:25,187 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 76 [2019-11-28 03:44:25,187 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 76 [2019-11-28 03:44:25,187 INFO L73 IsDeterministic]: Start isDeterministic. Operand 113 states and 155 transitions. [2019-11-28 03:44:25,187 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 03:44:25,188 INFO L688 BuchiCegarLoop]: Abstraction has 113 states and 155 transitions. [2019-11-28 03:44:25,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states and 155 transitions. [2019-11-28 03:44:25,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2019-11-28 03:44:25,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2019-11-28 03:44:25,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 155 transitions. [2019-11-28 03:44:25,200 INFO L711 BuchiCegarLoop]: Abstraction has 113 states and 155 transitions. [2019-11-28 03:44:25,200 INFO L591 BuchiCegarLoop]: Abstraction has 113 states and 155 transitions. [2019-11-28 03:44:25,200 INFO L424 BuchiCegarLoop]: ======== Iteration 5============ [2019-11-28 03:44:25,200 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 113 states and 155 transitions. [2019-11-28 03:44:25,202 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 15 [2019-11-28 03:44:25,203 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 03:44:25,203 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 03:44:25,204 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [6, 5, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 03:44:25,204 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2019-11-28 03:44:25,205 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 03:44:25,205 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 03:44:25,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:44:25,205 INFO L82 PathProgramCache]: Analyzing trace with hash 1087292419, now seen corresponding path program 2 times [2019-11-28 03:44:25,205 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 03:44:25,206 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11815758] [2019-11-28 03:44:25,206 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 03:44:25,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:25,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:25,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:25,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:25,330 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 03:44:25,331 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11815758] [2019-11-28 03:44:25,331 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629542475] [2019-11-28 03:44:25,331 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 03:44:25,365 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-28 03:44:25,366 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 03:44:25,366 INFO L255 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-28 03:44:25,368 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:25,396 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 03:44:25,397 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 03:44:25,397 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-11-28 03:44:25,397 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463632052] [2019-11-28 03:44:25,398 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-11-28 03:44:25,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:44:25,398 INFO L82 PathProgramCache]: Analyzing trace with hash 22774646, now seen corresponding path program 2 times [2019-11-28 03:44:25,399 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 03:44:25,399 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011047711] [2019-11-28 03:44:25,399 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 03:44:25,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 03:44:25,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 03:44:25,427 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 03:44:25,677 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 03:44:25,677 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 03:44:25,677 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 03:44:25,677 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 03:44:25,678 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-28 03:44:25,678 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:25,678 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 03:44:25,678 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 03:44:25,678 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-2.c_Iteration5_Loop [2019-11-28 03:44:25,678 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 03:44:25,678 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 03:44:25,679 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 03:44:25,682 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 03:44:25,685 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 03:44:25,688 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 03:44:25,781 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 03:44:25,781 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 03:44:25,791 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 03:44:25,791 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 03:44:25,794 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 03:44:25,794 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 03:44:25,801 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 03:44:25,801 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 03:44:25,804 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 03:44:25,804 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 03:44:25,810 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 03:44:25,810 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 03:44:25,813 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 03:44:25,813 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 03:44:25,820 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 03:44:25,820 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) [2019-11-28 03:44:25,851 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-28 03:44:25,851 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:26,367 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-28 03:44:26,369 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 03:44:26,370 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 03:44:26,370 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 03:44:26,370 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 03:44:26,370 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-28 03:44:26,370 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:26,370 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 03:44:26,370 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 03:44:26,370 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-2.c_Iteration5_Loop [2019-11-28 03:44:26,370 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 03:44:26,370 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 03:44:26,371 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 03:44:26,377 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 03:44:26,378 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 03:44:26,388 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 03:44:26,470 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 03:44:26,470 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 03:44:26,476 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 03:44:26,477 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 03:44:26,477 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 03:44:26,477 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 03:44:26,477 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 03:44:26,478 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 03:44:26,478 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 03:44:26,478 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 03:44:26,480 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:26,486 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 03:44:26,487 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 03:44:26,487 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 03:44:26,487 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 03:44:26,488 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 03:44:26,488 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 03:44:26,488 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 03:44:26,488 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 03:44:26,489 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:26,496 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 03:44:26,497 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 03:44:26,497 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 03:44:26,497 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 03:44:26,498 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 03:44:26,498 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 03:44:26,499 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 03:44:26,499 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 03:44:26,502 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-28 03:44:26,504 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2019-11-28 03:44:26,504 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 03:44:26,508 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-28 03:44:26,509 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-28 03:44:26,509 INFO L510 LassoAnalysis]: Proved termination. [2019-11-28 03:44:26,509 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2019-11-28 03:44:26,511 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-28 03:44:26,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:44:26,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:26,574 INFO L255 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-28 03:44:26,577 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:26,599 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 03:44:26,605 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 03:44:26,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:26,633 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-28 03:44:26,635 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:26,708 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 03:44:26,709 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 03:44:26,709 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 113 states and 155 transitions. cyclomatic complexity: 48 Second operand 8 states. [2019-11-28 03:44:26,943 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 03:44:26,944 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 03:44:26,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-11-28 03:44:26,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 36 transitions. [2019-11-28 03:44:26,945 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 36 transitions. Stem has 31 letters. Loop has 22 letters. [2019-11-28 03:44:26,945 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:44:26,945 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-28 03:44:26,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:44:27,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:27,008 INFO L255 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-28 03:44:27,010 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:27,031 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 03:44:27,034 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 03:44:27,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:27,059 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-28 03:44:27,061 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:27,120 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 03:44:27,121 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 03:44:27,121 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 113 states and 155 transitions. cyclomatic complexity: 48 Second operand 8 states. [2019-11-28 03:44:27,386 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 03:44:27,387 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 03:44:27,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-11-28 03:44:27,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 23 transitions. [2019-11-28 03:44:27,388 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 23 transitions. Stem has 31 letters. Loop has 22 letters. [2019-11-28 03:44:27,388 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:44:27,389 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-28 03:44:27,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:44:27,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:27,442 INFO L255 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-28 03:44:27,444 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:27,466 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 03:44:27,469 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 03:44:27,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:27,503 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-28 03:44:27,505 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:27,577 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 03:44:27,578 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 03:44:27,578 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 113 states and 155 transitions. cyclomatic complexity: 48 Second operand 8 states. [2019-11-28 03:44:27,884 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 03:44:27,885 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 03:44:27,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-11-28 03:44:27,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 41 transitions. [2019-11-28 03:44:27,886 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 41 transitions. Stem has 31 letters. Loop has 22 letters. [2019-11-28 03:44:27,887 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:44:27,887 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 41 transitions. Stem has 53 letters. Loop has 22 letters. [2019-11-28 03:44:27,889 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:44:27,889 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 41 transitions. Stem has 31 letters. Loop has 44 letters. [2019-11-28 03:44:27,891 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:44:27,891 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1077 states and 1512 transitions. [2019-11-28 03:44:27,912 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 58 [2019-11-28 03:44:27,930 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1077 states to 604 states and 935 transitions. [2019-11-28 03:44:27,931 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 242 [2019-11-28 03:44:27,932 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 271 [2019-11-28 03:44:27,932 INFO L73 IsDeterministic]: Start isDeterministic. Operand 604 states and 935 transitions. [2019-11-28 03:44:27,933 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 03:44:27,934 INFO L688 BuchiCegarLoop]: Abstraction has 604 states and 935 transitions. [2019-11-28 03:44:27,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states and 935 transitions. [2019-11-28 03:44:27,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 477. [2019-11-28 03:44:27,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 477 states. [2019-11-28 03:44:27,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 725 transitions. [2019-11-28 03:44:27,982 INFO L711 BuchiCegarLoop]: Abstraction has 477 states and 725 transitions. [2019-11-28 03:44:27,983 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 03:44:27,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-28 03:44:27,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2019-11-28 03:44:27,983 INFO L87 Difference]: Start difference. First operand 477 states and 725 transitions. Second operand 14 states. [2019-11-28 03:44:28,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 03:44:28,255 INFO L93 Difference]: Finished difference Result 537 states and 809 transitions. [2019-11-28 03:44:28,256 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-28 03:44:28,256 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 537 states and 809 transitions. [2019-11-28 03:44:28,267 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2019-11-28 03:44:28,279 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 537 states to 534 states and 802 transitions. [2019-11-28 03:44:28,279 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 239 [2019-11-28 03:44:28,281 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 239 [2019-11-28 03:44:28,281 INFO L73 IsDeterministic]: Start isDeterministic. Operand 534 states and 802 transitions. [2019-11-28 03:44:28,282 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 03:44:28,283 INFO L688 BuchiCegarLoop]: Abstraction has 534 states and 802 transitions. [2019-11-28 03:44:28,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states and 802 transitions. [2019-11-28 03:44:28,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 494. [2019-11-28 03:44:28,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 494 states. [2019-11-28 03:44:28,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 746 transitions. [2019-11-28 03:44:28,323 INFO L711 BuchiCegarLoop]: Abstraction has 494 states and 746 transitions. [2019-11-28 03:44:28,323 INFO L591 BuchiCegarLoop]: Abstraction has 494 states and 746 transitions. [2019-11-28 03:44:28,323 INFO L424 BuchiCegarLoop]: ======== Iteration 6============ [2019-11-28 03:44:28,323 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 494 states and 746 transitions. [2019-11-28 03:44:28,328 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2019-11-28 03:44:28,329 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 03:44:28,329 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 03:44:28,331 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1] [2019-11-28 03:44:28,331 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2019-11-28 03:44:28,332 INFO L794 eck$LassoCheckResult]: Stem: 4807#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 7; 4808#L25 call main_#t~ret2 := fibo(main_~x~0);< 4846#fiboENTRY ~n := #in~n; 4869#L6 assume !(~n < 1); 4868#L8 assume !(1 == ~n); 4864#L11 call #t~ret0 := fibo(~n - 1);< 4867#fiboENTRY ~n := #in~n; 4866#L6 assume !(~n < 1); 4865#L8 assume !(1 == ~n); 4860#L11 call #t~ret0 := fibo(~n - 1);< 4862#fiboENTRY ~n := #in~n; 4863#L6 assume !(~n < 1); 4859#L8 assume !(1 == ~n); 4811#L11 call #t~ret0 := fibo(~n - 1);< 4856#fiboENTRY ~n := #in~n; 4857#L6 assume !(~n < 1); 4861#L8 assume !(1 == ~n); 4810#L11 call #t~ret0 := fibo(~n - 1);< 4856#fiboENTRY ~n := #in~n; 4858#L6 assume !(~n < 1); 4809#L8 assume 1 == ~n;#res := 1; 4812#fiboFINAL assume true; 4951#fiboEXIT >#32#return; 4930#L11-1 call #t~ret1 := fibo(~n - 2);< 4938#fiboENTRY ~n := #in~n; 5030#L6 assume !(~n < 1); 4955#L8 assume !(1 == ~n); 4956#L11 call #t~ret0 := fibo(~n - 1);< 4965#fiboENTRY ~n := #in~n; 5112#L6 assume !(~n < 1); 5035#L8 assume !(1 == ~n); 5036#L11 call #t~ret0 := fibo(~n - 1);< 5054#fiboENTRY [2019-11-28 03:44:28,332 INFO L796 eck$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 03:44:28,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:44:28,332 INFO L82 PathProgramCache]: Analyzing trace with hash 116207529, now seen corresponding path program 1 times [2019-11-28 03:44:28,333 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 03:44:28,333 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291107295] [2019-11-28 03:44:28,333 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 03:44:28,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:28,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:28,585 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 03:44:28,586 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291107295] [2019-11-28 03:44:28,586 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574874762] [2019-11-28 03:44:28,586 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) [2019-11-28 03:44:28,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 03:44:28,623 INFO L255 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-28 03:44:28,626 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:28,684 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 03:44:28,684 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 03:44:28,684 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 13] total 20 [2019-11-28 03:44:28,687 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693221687] [2019-11-28 03:44:28,687 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-11-28 03:44:28,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:44:28,687 INFO L82 PathProgramCache]: Analyzing trace with hash 1420172, now seen corresponding path program 2 times [2019-11-28 03:44:28,688 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 03:44:28,691 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946041544] [2019-11-28 03:44:28,691 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 03:44:28,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 03:44:28,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 03:44:28,702 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 03:44:28,740 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 03:44:28,740 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 03:44:28,740 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 03:44:28,740 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 03:44:28,740 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-28 03:44:28,740 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:28,740 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 03:44:28,741 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 03:44:28,741 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-2.c_Iteration6_Loop [2019-11-28 03:44:28,741 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 03:44:28,741 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 03:44:28,742 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 03:44:28,746 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 03:44:28,748 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 03:44:28,750 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 03:44:28,757 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 03:44:28,793 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 03:44:28,793 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) [2019-11-28 03:44:28,805 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 03:44:28,806 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:28,811 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 03:44:28,811 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 03:44:28,821 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 03:44:28,821 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 03:44:28,825 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 03:44:28,825 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 03:44:28,833 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 03:44:28,833 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 03:44:28,837 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 03:44:28,837 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 03:44:28,849 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 03:44:28,849 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 03:44:28,865 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-28 03:44:28,865 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 03:44:28,933 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-28 03:44:28,935 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 03:44:28,935 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 03:44:28,935 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 03:44:28,936 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 03:44:28,936 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-28 03:44:28,936 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:28,936 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 03:44:28,936 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 03:44:28,936 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-2.c_Iteration6_Loop [2019-11-28 03:44:28,936 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 03:44:28,936 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 03:44:28,937 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 03:44:28,940 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 03:44:28,942 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 03:44:28,946 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 03:44:28,953 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 03:44:28,997 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 03:44:28,997 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 03:44:29,012 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 03:44:29,013 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 03:44:29,013 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 03:44:29,013 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 03:44:29,014 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 03:44:29,014 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 03:44:29,015 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 03:44:29,015 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 03:44:29,017 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:29,027 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 03:44:29,029 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 03:44:29,029 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 03:44:29,029 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 03:44:29,029 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 03:44:29,029 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 03:44:29,030 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 03:44:29,030 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 03:44:29,033 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 03:44:29,044 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 03:44:29,045 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 03:44:29,045 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 03:44:29,045 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 03:44:29,045 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 03:44:29,045 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 03:44:29,046 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 03:44:29,046 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 03:44:29,047 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 03:44:29,054 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 03:44:29,055 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 03:44:29,055 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 03:44:29,056 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 03:44:29,056 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 03:44:29,056 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 03:44:29,057 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 03:44:29,057 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 03:44:29,060 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-28 03:44:29,067 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-28 03:44:29,067 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) Waiting until toolchain timeout for monitored process 43 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:29,073 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-28 03:44:29,073 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-28 03:44:29,074 INFO L510 LassoAnalysis]: Proved termination. [2019-11-28 03:44:29,074 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_#in~n) = 1*fibo_#in~n Supporting invariants [] [2019-11-28 03:44:29,075 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-28 03:44:29,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:44:29,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:29,124 INFO L255 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-28 03:44:29,126 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:29,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:29,169 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 03:44:29,169 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:29,192 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 03:44:29,193 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 03:44:29,193 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 494 states and 746 transitions. cyclomatic complexity: 262 Second operand 5 states. [2019-11-28 03:44:29,274 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 03:44:29,275 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 03:44:29,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-11-28 03:44:29,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 12 transitions. [2019-11-28 03:44:29,276 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 12 transitions. Stem has 32 letters. Loop has 4 letters. [2019-11-28 03:44:29,277 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:44:29,277 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-28 03:44:29,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:44:29,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:29,337 INFO L255 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-28 03:44:29,339 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:29,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:29,372 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 03:44:29,372 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:29,396 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 03:44:29,396 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 03:44:29,399 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 494 states and 746 transitions. cyclomatic complexity: 262 Second operand 5 states. [2019-11-28 03:44:29,479 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 03:44:29,480 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 03:44:29,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-11-28 03:44:29,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 12 transitions. [2019-11-28 03:44:29,480 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 12 transitions. Stem has 32 letters. Loop has 4 letters. [2019-11-28 03:44:29,481 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:44:29,482 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-28 03:44:29,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:44:29,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:29,539 INFO L255 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-28 03:44:29,541 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:29,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:29,577 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 03:44:29,577 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:29,595 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 03:44:29,596 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 03:44:29,596 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 494 states and 746 transitions. cyclomatic complexity: 262 Second operand 5 states. [2019-11-28 03:44:29,687 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 03:44:29,688 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 03:44:29,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-11-28 03:44:29,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 20 transitions. [2019-11-28 03:44:29,689 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 20 transitions. Stem has 32 letters. Loop has 4 letters. [2019-11-28 03:44:29,689 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:44:29,689 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 20 transitions. Stem has 36 letters. Loop has 4 letters. [2019-11-28 03:44:29,690 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:44:29,690 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 20 transitions. Stem has 32 letters. Loop has 8 letters. [2019-11-28 03:44:29,690 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:44:29,691 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 650 states and 920 transitions. [2019-11-28 03:44:29,701 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2019-11-28 03:44:29,711 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 650 states to 548 states and 806 transitions. [2019-11-28 03:44:29,711 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 199 [2019-11-28 03:44:29,712 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 208 [2019-11-28 03:44:29,712 INFO L73 IsDeterministic]: Start isDeterministic. Operand 548 states and 806 transitions. [2019-11-28 03:44:29,717 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 03:44:29,718 INFO L688 BuchiCegarLoop]: Abstraction has 548 states and 806 transitions. [2019-11-28 03:44:29,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states and 806 transitions. [2019-11-28 03:44:29,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 518. [2019-11-28 03:44:29,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 518 states. [2019-11-28 03:44:29,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 770 transitions. [2019-11-28 03:44:29,745 INFO L711 BuchiCegarLoop]: Abstraction has 518 states and 770 transitions. [2019-11-28 03:44:29,745 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 03:44:29,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-28 03:44:29,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2019-11-28 03:44:29,747 INFO L87 Difference]: Start difference. First operand 518 states and 770 transitions. Second operand 20 states. [2019-11-28 03:44:30,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 03:44:30,113 INFO L93 Difference]: Finished difference Result 585 states and 871 transitions. [2019-11-28 03:44:30,113 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-28 03:44:30,114 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 585 states and 871 transitions. [2019-11-28 03:44:30,122 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2019-11-28 03:44:30,132 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 585 states to 575 states and 857 transitions. [2019-11-28 03:44:30,132 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 221 [2019-11-28 03:44:30,133 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 221 [2019-11-28 03:44:30,133 INFO L73 IsDeterministic]: Start isDeterministic. Operand 575 states and 857 transitions. [2019-11-28 03:44:30,133 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 03:44:30,133 INFO L688 BuchiCegarLoop]: Abstraction has 575 states and 857 transitions. [2019-11-28 03:44:30,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states and 857 transitions. [2019-11-28 03:44:30,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 541. [2019-11-28 03:44:30,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 541 states. [2019-11-28 03:44:30,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 807 transitions. [2019-11-28 03:44:30,154 INFO L711 BuchiCegarLoop]: Abstraction has 541 states and 807 transitions. [2019-11-28 03:44:30,154 INFO L591 BuchiCegarLoop]: Abstraction has 541 states and 807 transitions. [2019-11-28 03:44:30,154 INFO L424 BuchiCegarLoop]: ======== Iteration 7============ [2019-11-28 03:44:30,154 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 541 states and 807 transitions. [2019-11-28 03:44:30,158 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2019-11-28 03:44:30,158 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 03:44:30,158 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 03:44:30,159 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [9, 9, 8, 7, 1, 1, 1, 1, 1, 1] [2019-11-28 03:44:30,160 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2019-11-28 03:44:30,160 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 03:44:30,160 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 03:44:30,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:44:30,160 INFO L82 PathProgramCache]: Analyzing trace with hash -989900256, now seen corresponding path program 2 times [2019-11-28 03:44:30,161 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 03:44:30,161 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403014387] [2019-11-28 03:44:30,161 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 03:44:30,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:30,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:30,398 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 03:44:30,399 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403014387] [2019-11-28 03:44:30,399 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94866215] [2019-11-28 03:44:30,399 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 03:44:30,447 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-28 03:44:30,448 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 03:44:30,449 INFO L255 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-28 03:44:30,450 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:30,509 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 03:44:30,510 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 03:44:30,510 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 15] total 23 [2019-11-28 03:44:30,510 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242007176] [2019-11-28 03:44:30,511 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-11-28 03:44:30,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:44:30,511 INFO L82 PathProgramCache]: Analyzing trace with hash 1863062, now seen corresponding path program 3 times [2019-11-28 03:44:30,511 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 03:44:30,512 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85315554] [2019-11-28 03:44:30,512 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 03:44:30,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 03:44:30,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 03:44:30,516 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 03:44:30,571 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 03:44:30,571 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 03:44:30,572 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 03:44:30,572 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 03:44:30,572 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-28 03:44:30,572 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:30,572 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 03:44:30,573 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 03:44:30,573 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-2.c_Iteration7_Loop [2019-11-28 03:44:30,573 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 03:44:30,573 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 03:44:30,574 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 03:44:30,577 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 03:44:30,580 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 03:44:30,582 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 03:44:30,647 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 03:44:30,648 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) [2019-11-28 03:44:30,659 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 03:44:30,659 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 45 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:30,668 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 03:44:30,668 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) [2019-11-28 03:44:30,678 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 03:44:30,678 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 46 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:30,683 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 03:44:30,683 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) [2019-11-28 03:44:30,694 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 03:44:30,695 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 47 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:30,700 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 03:44:30,700 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) [2019-11-28 03:44:30,711 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 03:44:30,712 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 48 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 49 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 03:44:30,731 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-28 03:44:30,731 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 49 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:36,584 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-28 03:44:36,586 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 03:44:36,586 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 03:44:36,586 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 03:44:36,586 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 03:44:36,586 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-28 03:44:36,587 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:36,587 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 03:44:36,587 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 03:44:36,587 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-2.c_Iteration7_Loop [2019-11-28 03:44:36,587 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 03:44:36,587 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 03:44:36,588 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 03:44:36,590 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 03:44:36,591 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 03:44:36,593 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 03:44:36,659 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 03:44:36,660 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 03:44:36,698 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 03:44:36,700 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 03:44:36,701 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 03:44:36,701 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 03:44:36,701 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 03:44:36,701 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 03:44:36,701 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 03:44:36,701 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 03:44:36,703 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 03:44:36,708 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 03:44:36,709 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 03:44:36,710 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 03:44:36,710 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 03:44:36,710 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 03:44:36,710 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 03:44:36,710 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 03:44:36,710 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 03:44:36,712 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 03:44:36,717 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 03:44:36,720 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 03:44:36,720 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 03:44:36,721 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 03:44:36,721 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 03:44:36,721 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 03:44:36,721 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 03:44:36,721 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 03:44:36,725 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) Waiting until toolchain timeout for monitored process 53 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:36,730 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 03:44:36,732 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 03:44:36,732 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 03:44:36,732 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 03:44:36,732 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 03:44:36,732 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 03:44:36,733 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 03:44:36,733 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 03:44:36,735 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-28 03:44:36,741 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-28 03:44:36,741 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 03:44:36,746 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-28 03:44:36,746 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-28 03:44:36,746 INFO L510 LassoAnalysis]: Proved termination. [2019-11-28 03:44:36,746 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2019-11-28 03:44:36,748 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-28 03:44:36,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:44:36,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:36,808 INFO L255 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-28 03:44:36,809 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:36,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:36,847 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 03:44:36,847 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:36,879 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 03:44:36,879 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 03:44:36,879 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 541 states and 807 transitions. cyclomatic complexity: 276 Second operand 6 states. [2019-11-28 03:44:36,932 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 03:44:36,933 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 03:44:36,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-11-28 03:44:36,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 12 transitions. [2019-11-28 03:44:36,934 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 12 transitions. Stem has 39 letters. Loop has 4 letters. [2019-11-28 03:44:36,934 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:44:36,934 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-28 03:44:36,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:44:36,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:36,991 INFO L255 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-28 03:44:36,993 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:37,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:37,021 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 03:44:37,022 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:37,051 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 03:44:37,051 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 03:44:37,052 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 541 states and 807 transitions. cyclomatic complexity: 276 Second operand 6 states. [2019-11-28 03:44:37,147 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 03:44:37,148 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 03:44:37,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-11-28 03:44:37,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 15 transitions. [2019-11-28 03:44:37,149 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 15 transitions. Stem has 39 letters. Loop has 4 letters. [2019-11-28 03:44:37,150 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:44:37,150 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 15 transitions. Stem has 43 letters. Loop has 4 letters. [2019-11-28 03:44:37,150 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:44:37,150 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 15 transitions. Stem has 39 letters. Loop has 8 letters. [2019-11-28 03:44:37,152 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:44:37,152 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 786 states and 1145 transitions. [2019-11-28 03:44:37,164 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2019-11-28 03:44:37,176 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 786 states to 719 states and 1073 transitions. [2019-11-28 03:44:37,177 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 241 [2019-11-28 03:44:37,177 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 269 [2019-11-28 03:44:37,178 INFO L73 IsDeterministic]: Start isDeterministic. Operand 719 states and 1073 transitions. [2019-11-28 03:44:37,178 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 03:44:37,178 INFO L688 BuchiCegarLoop]: Abstraction has 719 states and 1073 transitions. [2019-11-28 03:44:37,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states and 1073 transitions. [2019-11-28 03:44:37,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 706. [2019-11-28 03:44:37,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 706 states. [2019-11-28 03:44:37,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706 states to 706 states and 1056 transitions. [2019-11-28 03:44:37,205 INFO L711 BuchiCegarLoop]: Abstraction has 706 states and 1056 transitions. [2019-11-28 03:44:37,205 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 03:44:37,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-28 03:44:37,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2019-11-28 03:44:37,207 INFO L87 Difference]: Start difference. First operand 706 states and 1056 transitions. Second operand 23 states. [2019-11-28 03:44:37,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 03:44:37,847 INFO L93 Difference]: Finished difference Result 1715 states and 3613 transitions. [2019-11-28 03:44:37,848 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-28 03:44:37,848 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1715 states and 3613 transitions. [2019-11-28 03:44:37,875 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 156 [2019-11-28 03:44:37,910 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1715 states to 1469 states and 3094 transitions. [2019-11-28 03:44:37,911 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 506 [2019-11-28 03:44:37,912 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 533 [2019-11-28 03:44:37,913 INFO L73 IsDeterministic]: Start isDeterministic. Operand 1469 states and 3094 transitions. [2019-11-28 03:44:37,913 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 03:44:37,913 INFO L688 BuchiCegarLoop]: Abstraction has 1469 states and 3094 transitions. [2019-11-28 03:44:37,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1469 states and 3094 transitions. [2019-11-28 03:44:37,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1469 to 1302. [2019-11-28 03:44:37,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1302 states. [2019-11-28 03:44:37,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1302 states to 1302 states and 2622 transitions. [2019-11-28 03:44:37,982 INFO L711 BuchiCegarLoop]: Abstraction has 1302 states and 2622 transitions. [2019-11-28 03:44:37,982 INFO L591 BuchiCegarLoop]: Abstraction has 1302 states and 2622 transitions. [2019-11-28 03:44:37,982 INFO L424 BuchiCegarLoop]: ======== Iteration 8============ [2019-11-28 03:44:37,982 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 1302 states and 2622 transitions. [2019-11-28 03:44:37,993 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 147 [2019-11-28 03:44:37,993 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 03:44:37,993 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 03:44:37,998 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [11, 10, 9, 8, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2019-11-28 03:44:37,998 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2019-11-28 03:44:38,000 INFO L794 eck$LassoCheckResult]: Stem: 13389#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 7; 13390#L25 call main_#t~ret2 := fibo(main_~x~0);< 13431#fiboENTRY ~n := #in~n; 13477#L6 assume !(~n < 1); 13476#L8 assume !(1 == ~n); 13472#L11 call #t~ret0 := fibo(~n - 1);< 13475#fiboENTRY ~n := #in~n; 13474#L6 assume !(~n < 1); 13473#L8 assume !(1 == ~n); 13468#L11 call #t~ret0 := fibo(~n - 1);< 13471#fiboENTRY ~n := #in~n; 13470#L6 assume !(~n < 1); 13469#L8 assume !(1 == ~n); 13464#L11 call #t~ret0 := fibo(~n - 1);< 13467#fiboENTRY ~n := #in~n; 13466#L6 assume !(~n < 1); 13465#L8 assume !(1 == ~n); 13416#L11 call #t~ret0 := fibo(~n - 1);< 13463#fiboENTRY ~n := #in~n; 13461#L6 assume !(~n < 1); 13462#L8 assume !(1 == ~n); 13417#L11 call #t~ret0 := fibo(~n - 1);< 13457#fiboENTRY ~n := #in~n; 13458#L6 assume !(~n < 1); 13460#L8 assume !(1 == ~n); 13418#L11 call #t~ret0 := fibo(~n - 1);< 13509#fiboENTRY ~n := #in~n; 13527#L6 assume !(~n < 1); 13524#L8 assume 1 == ~n;#res := 1; 13521#fiboFINAL assume true; 13517#fiboEXIT >#32#return; 13501#L11-1 call #t~ret1 := fibo(~n - 2);< 13502#fiboENTRY ~n := #in~n; 14599#L6 assume ~n < 1;#res := 0; 14598#fiboFINAL assume true; 14594#fiboEXIT >#34#return; 14579#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret0;havoc #t~ret1; 14590#fiboFINAL assume true; 14505#fiboEXIT >#32#return; 13496#L11-1 call #t~ret1 := fibo(~n - 2);< 14500#fiboENTRY ~n := #in~n; 13494#L6 assume !(~n < 1); 13499#L8 assume !(1 == ~n); 13454#L11 call #t~ret0 := fibo(~n - 1);< 14098#fiboENTRY ~n := #in~n; 14097#L6 assume !(~n < 1); 14096#L8 assume !(1 == ~n); 13448#L11 call #t~ret0 := fibo(~n - 1);< 13591#fiboENTRY ~n := #in~n; 14076#L6 assume !(~n < 1); 14074#L8 assume !(1 == ~n); 13450#L11 [2019-11-28 03:44:38,000 INFO L796 eck$LassoCheckResult]: Loop: 13450#L11 call #t~ret0 := fibo(~n - 1);< 13591#fiboENTRY ~n := #in~n; 14076#L6 assume !(~n < 1); 14074#L8 assume !(1 == ~n); 13450#L11 [2019-11-28 03:44:38,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:44:38,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1997475882, now seen corresponding path program 3 times [2019-11-28 03:44:38,001 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 03:44:38,001 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602673209] [2019-11-28 03:44:38,001 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 03:44:38,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:38,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:38,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:38,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:38,249 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 03:44:38,250 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602673209] [2019-11-28 03:44:38,250 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312926226] [2019-11-28 03:44:38,250 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 03:44:38,285 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-28 03:44:38,285 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 03:44:38,286 INFO L255 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-28 03:44:38,287 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:38,330 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 03:44:38,330 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 03:44:38,330 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 11] total 22 [2019-11-28 03:44:38,330 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354843702] [2019-11-28 03:44:38,331 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-11-28 03:44:38,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:44:38,331 INFO L82 PathProgramCache]: Analyzing trace with hash 1863062, now seen corresponding path program 4 times [2019-11-28 03:44:38,331 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 03:44:38,332 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696688264] [2019-11-28 03:44:38,332 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 03:44:38,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 03:44:38,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 03:44:38,335 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 03:44:38,375 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 03:44:38,375 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 03:44:38,375 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 03:44:38,376 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 03:44:38,376 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-28 03:44:38,376 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:38,376 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 03:44:38,376 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 03:44:38,376 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-2.c_Iteration8_Loop [2019-11-28 03:44:38,377 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 03:44:38,377 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 03:44:38,380 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 03:44:38,391 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 03:44:38,393 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 03:44:38,395 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 03:44:38,442 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 03:44:38,442 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 03:44:38,448 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 03:44:38,448 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) [2019-11-28 03:44:38,458 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-28 03:44:38,458 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 57 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:41,128 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-28 03:44:41,130 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 03:44:41,130 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 03:44:41,131 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 03:44:41,131 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 03:44:41,131 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-28 03:44:41,131 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:41,131 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 03:44:41,131 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 03:44:41,131 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-2.c_Iteration8_Loop [2019-11-28 03:44:41,131 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 03:44:41,131 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 03:44:41,132 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 03:44:41,133 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 03:44:41,134 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 03:44:41,136 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 03:44:41,197 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 03:44:41,197 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 03:44:41,202 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 03:44:41,205 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 03:44:41,206 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 03:44:41,206 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 03:44:41,206 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 03:44:41,206 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. Waiting until toolchain timeout for monitored process 58 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:41,207 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 03:44:41,207 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 03:44:41,208 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) [2019-11-28 03:44:41,215 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 03:44:41,216 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 03:44:41,216 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 03:44:41,217 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 03:44:41,217 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 03:44:41,217 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 03:44:41,217 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 03:44:41,217 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 59 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:41,219 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 03:44:41,224 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 03:44:41,225 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 03:44:41,226 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 03:44:41,226 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 03:44:41,226 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 03:44:41,226 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 03:44:41,226 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 03:44:41,226 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 03:44:41,228 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:41,233 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 03:44:41,234 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 03:44:41,234 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 03:44:41,234 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 03:44:41,234 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 03:44:41,235 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 03:44:41,235 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 03:44:41,236 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 03:44:41,239 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-28 03:44:41,242 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-28 03:44:41,242 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 03:44:41,246 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-28 03:44:41,246 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-28 03:44:41,246 INFO L510 LassoAnalysis]: Proved termination. [2019-11-28 03:44:41,246 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2019-11-28 03:44:41,248 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-28 03:44:41,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:44:41,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:41,333 INFO L255 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-28 03:44:41,335 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:41,356 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 03:44:41,358 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 03:44:41,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:41,365 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 03:44:41,366 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:41,395 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 03:44:41,396 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 03:44:41,396 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 1302 states and 2622 transitions. cyclomatic complexity: 1333 Second operand 6 states. [2019-11-28 03:44:41,478 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 03:44:41,478 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 03:44:41,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-11-28 03:44:41,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 12 transitions. [2019-11-28 03:44:41,479 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 12 transitions. Stem has 51 letters. Loop has 4 letters. [2019-11-28 03:44:41,479 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:44:41,480 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-28 03:44:41,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:44:41,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:41,551 INFO L255 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-28 03:44:41,555 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:41,572 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 03:44:41,575 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 03:44:41,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:41,587 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 03:44:41,587 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:41,616 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 03:44:41,617 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 03:44:41,617 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 1302 states and 2622 transitions. cyclomatic complexity: 1333 Second operand 6 states. [2019-11-28 03:44:41,739 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 03:44:41,740 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 03:44:41,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-11-28 03:44:41,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 15 transitions. [2019-11-28 03:44:41,741 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 15 transitions. Stem has 51 letters. Loop has 4 letters. [2019-11-28 03:44:41,741 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:44:41,742 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-28 03:44:41,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:44:41,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:41,865 INFO L255 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-28 03:44:41,868 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:41,886 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 03:44:41,888 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 03:44:41,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:41,898 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 03:44:41,899 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:41,929 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 03:44:41,930 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 03:44:41,930 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 1302 states and 2622 transitions. cyclomatic complexity: 1333 Second operand 6 states. [2019-11-28 03:44:42,037 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 03:44:42,037 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 03:44:42,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-11-28 03:44:42,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 21 transitions. [2019-11-28 03:44:42,039 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 51 letters. Loop has 4 letters. [2019-11-28 03:44:42,039 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:44:42,039 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 55 letters. Loop has 4 letters. [2019-11-28 03:44:42,041 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:44:42,042 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 51 letters. Loop has 8 letters. [2019-11-28 03:44:42,042 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:44:42,042 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1635 states and 3078 transitions. [2019-11-28 03:44:42,070 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 147 [2019-11-28 03:44:42,105 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1635 states to 1302 states and 2622 transitions. [2019-11-28 03:44:42,105 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 411 [2019-11-28 03:44:42,107 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 447 [2019-11-28 03:44:42,108 INFO L73 IsDeterministic]: Start isDeterministic. Operand 1302 states and 2622 transitions. [2019-11-28 03:44:42,108 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 03:44:42,108 INFO L688 BuchiCegarLoop]: Abstraction has 1302 states and 2622 transitions. [2019-11-28 03:44:42,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1302 states and 2622 transitions. [2019-11-28 03:44:42,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1302 to 1302. [2019-11-28 03:44:42,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1302 states. [2019-11-28 03:44:42,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1302 states to 1302 states and 2622 transitions. [2019-11-28 03:44:42,177 INFO L711 BuchiCegarLoop]: Abstraction has 1302 states and 2622 transitions. [2019-11-28 03:44:42,177 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 03:44:42,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-28 03:44:42,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2019-11-28 03:44:42,178 INFO L87 Difference]: Start difference. First operand 1302 states and 2622 transitions. Second operand 22 states. [2019-11-28 03:44:42,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 03:44:42,538 INFO L93 Difference]: Finished difference Result 400 states and 513 transitions. [2019-11-28 03:44:42,538 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-28 03:44:42,539 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 400 states and 513 transitions. [2019-11-28 03:44:42,543 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2019-11-28 03:44:42,543 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 400 states to 0 states and 0 transitions. [2019-11-28 03:44:42,543 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2019-11-28 03:44:42,543 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2019-11-28 03:44:42,544 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2019-11-28 03:44:42,544 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2019-11-28 03:44:42,544 INFO L688 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-28 03:44:42,544 INFO L711 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-28 03:44:42,544 INFO L591 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-28 03:44:42,544 INFO L424 BuchiCegarLoop]: ======== Iteration 9============ [2019-11-28 03:44:42,545 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2019-11-28 03:44:42,545 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2019-11-28 03:44:42,545 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2019-11-28 03:44:42,553 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 28.11 03:44:42 BoogieIcfgContainer [2019-11-28 03:44:42,553 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2019-11-28 03:44:42,555 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-28 03:44:42,555 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-28 03:44:42,555 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-28 03:44:42,556 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:44:20" (3/4) ... [2019-11-28 03:44:42,560 INFO L140 WitnessPrinter]: No result that supports witness generation found [2019-11-28 03:44:42,561 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-28 03:44:42,563 INFO L168 Benchmark]: Toolchain (without parser) took 22452.62 ms. Allocated memory was 1.0 GB in the beginning and 1.4 GB in the end (delta: 370.1 MB). Free memory was 960.4 MB in the beginning and 1.2 GB in the end (delta: -262.2 MB). Peak memory consumption was 107.9 MB. Max. memory is 11.5 GB. [2019-11-28 03:44:42,564 INFO L168 Benchmark]: CDTParser took 0.28 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 03:44:42,564 INFO L168 Benchmark]: CACSL2BoogieTranslator took 362.31 ms. Allocated memory is still 1.0 GB. Free memory was 960.4 MB in the beginning and 949.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-11-28 03:44:42,565 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.25 ms. Allocated memory is still 1.0 GB. Free memory is still 949.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 03:44:42,565 INFO L168 Benchmark]: Boogie Preprocessor took 126.22 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 148.4 MB). Free memory was 949.6 MB in the beginning and 1.1 GB in the end (delta: -194.7 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. [2019-11-28 03:44:42,566 INFO L168 Benchmark]: RCFGBuilder took 274.38 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: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 11.5 GB. [2019-11-28 03:44:42,576 INFO L168 Benchmark]: BuchiAutomizer took 21632.51 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 221.8 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -99.2 MB). Peak memory consumption was 122.6 MB. Max. memory is 11.5 GB. [2019-11-28 03:44:42,578 INFO L168 Benchmark]: Witness Printer took 5.89 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 03:44:42,582 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 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 362.31 ms. Allocated memory is still 1.0 GB. Free memory was 960.4 MB in the beginning and 949.6 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 42.25 ms. Allocated memory is still 1.0 GB. Free memory is still 949.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 126.22 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 148.4 MB). Free memory was 949.6 MB in the beginning and 1.1 GB in the end (delta: -194.7 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. * RCFGBuilder took 274.38 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: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 21632.51 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 221.8 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -99.2 MB). Peak memory consumption was 122.6 MB. Max. memory is 11.5 GB. * Witness Printer took 5.89 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 21.5s and 9 iterations. TraceHistogramMax:11. Analysis of lassos took 14.6s. Construction of modules took 1.8s. Büchi inclusion checks took 4.2s. 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, 1.8s 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: 16ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 13 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 6 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 10.0s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...