./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/recursive-simple/fibo_5-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version f470102c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerTermination.xml -i ../sv-benchmarks/c/recursive-simple/fibo_5-2.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 9fa59d7f4411ba9a1b89a97ebb9693c6867ac636 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-f470102 [2019-11-28 21:16:41,655 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-28 21:16:41,658 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-28 21:16:41,677 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-28 21:16:41,678 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-28 21:16:41,680 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-28 21:16:41,682 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-28 21:16:41,692 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-28 21:16:41,698 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-28 21:16:41,701 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-28 21:16:41,703 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-28 21:16:41,705 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-28 21:16:41,705 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-28 21:16:41,708 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-28 21:16:41,709 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-28 21:16:41,711 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-28 21:16:41,713 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-28 21:16:41,714 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-28 21:16:41,717 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-28 21:16:41,721 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-28 21:16:41,725 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-28 21:16:41,729 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-28 21:16:41,730 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-28 21:16:41,731 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-28 21:16:41,733 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-28 21:16:41,733 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-28 21:16:41,734 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-28 21:16:41,735 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-28 21:16:41,735 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-28 21:16:41,736 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-28 21:16:41,737 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-28 21:16:41,737 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-28 21:16:41,738 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-28 21:16:41,739 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-28 21:16:41,740 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-28 21:16:41,740 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-28 21:16:41,741 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-28 21:16:41,741 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-28 21:16:41,742 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-28 21:16:41,743 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-28 21:16:41,744 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-28 21:16:41,745 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-32bit-Automizer_Default.epf [2019-11-28 21:16:41,761 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-28 21:16:41,762 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-28 21:16:41,763 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-28 21:16:41,764 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-28 21:16:41,764 INFO L138 SettingsManager]: * Use SBE=true [2019-11-28 21:16:41,764 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2019-11-28 21:16:41,765 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2019-11-28 21:16:41,765 INFO L138 SettingsManager]: * Use old map elimination=false [2019-11-28 21:16:41,765 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2019-11-28 21:16:41,765 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2019-11-28 21:16:41,766 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2019-11-28 21:16:41,766 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-28 21:16:41,766 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-28 21:16:41,766 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-28 21:16:41,767 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-28 21:16:41,767 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-28 21:16:41,767 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-28 21:16:41,767 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2019-11-28 21:16:41,768 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2019-11-28 21:16:41,768 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2019-11-28 21:16:41,768 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-28 21:16:41,769 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-28 21:16:41,769 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2019-11-28 21:16:41,769 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-28 21:16:41,769 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2019-11-28 21:16:41,770 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-28 21:16:41,770 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-28 21:16:41,770 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2019-11-28 21:16:41,771 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-28 21:16:41,771 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-28 21:16:41,771 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-11-28 21:16:41,772 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2019-11-28 21:16:41,773 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2019-11-28 21:16:41,773 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 -> 9fa59d7f4411ba9a1b89a97ebb9693c6867ac636 [2019-11-28 21:16:42,092 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-28 21:16:42,111 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-28 21:16:42,115 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-28 21:16:42,116 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-28 21:16:42,116 INFO L275 PluginConnector]: CDTParser initialized [2019-11-28 21:16:42,117 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/fibo_5-2.c [2019-11-28 21:16:42,186 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cede1abef/879270f809de47c79b524f3221953623/FLAG26dfd70b7 [2019-11-28 21:16:42,668 INFO L306 CDTParser]: Found 1 translation units. [2019-11-28 21:16:42,669 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_5-2.c [2019-11-28 21:16:42,676 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cede1abef/879270f809de47c79b524f3221953623/FLAG26dfd70b7 [2019-11-28 21:16:43,034 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cede1abef/879270f809de47c79b524f3221953623 [2019-11-28 21:16:43,039 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-28 21:16:43,041 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-28 21:16:43,043 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-28 21:16:43,043 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-28 21:16:43,047 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-28 21:16:43,048 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 09:16:43" (1/1) ... [2019-11-28 21:16:43,051 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6876a529 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 09:16:43, skipping insertion in model container [2019-11-28 21:16:43,052 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 09:16:43" (1/1) ... [2019-11-28 21:16:43,059 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-28 21:16:43,076 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-28 21:16:43,295 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 21:16:43,302 INFO L203 MainTranslator]: Completed pre-run [2019-11-28 21:16:43,324 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 21:16:43,335 INFO L208 MainTranslator]: Completed translation [2019-11-28 21:16:43,335 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 09:16:43 WrapperNode [2019-11-28 21:16:43,336 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-28 21:16:43,337 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-28 21:16:43,337 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-28 21:16:43,337 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-28 21:16:43,344 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 09:16:43" (1/1) ... [2019-11-28 21:16:43,348 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 09:16:43" (1/1) ... [2019-11-28 21:16:43,365 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-28 21:16:43,365 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-28 21:16:43,365 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-28 21:16:43,365 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-28 21:16:43,431 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 09:16:43" (1/1) ... [2019-11-28 21:16:43,431 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 09:16:43" (1/1) ... [2019-11-28 21:16:43,432 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 09:16:43" (1/1) ... [2019-11-28 21:16:43,432 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 09:16:43" (1/1) ... [2019-11-28 21:16:43,434 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 09:16:43" (1/1) ... [2019-11-28 21:16:43,437 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 09:16:43" (1/1) ... [2019-11-28 21:16:43,438 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 09:16:43" (1/1) ... [2019-11-28 21:16:43,440 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-28 21:16:43,440 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-28 21:16:43,441 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-28 21:16:43,441 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-28 21:16:43,444 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 09:16:43" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:43,506 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-28 21:16:43,507 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-28 21:16:43,507 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2019-11-28 21:16:43,507 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2019-11-28 21:16:43,664 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-28 21:16:43,665 INFO L287 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-28 21:16:43,666 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 09:16:43 BoogieIcfgContainer [2019-11-28 21:16:43,666 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-28 21:16:43,667 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2019-11-28 21:16:43,667 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2019-11-28 21:16:43,671 INFO L275 PluginConnector]: BuchiAutomizer initialized [2019-11-28 21:16:43,672 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-28 21:16:43,673 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 28.11 09:16:43" (1/3) ... [2019-11-28 21:16:43,674 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@24a1a1e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 28.11 09:16:43, skipping insertion in model container [2019-11-28 21:16:43,674 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-28 21:16:43,674 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 09:16:43" (2/3) ... [2019-11-28 21:16:43,675 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@24a1a1e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 28.11 09:16:43, skipping insertion in model container [2019-11-28 21:16:43,675 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-28 21:16:43,675 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 09:16:43" (3/3) ... [2019-11-28 21:16:43,677 INFO L371 chiAutomizerObserver]: Analyzing ICFG fibo_5-2.c [2019-11-28 21:16:43,730 INFO L356 BuchiCegarLoop]: Interprodecural is true [2019-11-28 21:16:43,730 INFO L357 BuchiCegarLoop]: Hoare is false [2019-11-28 21:16:43,731 INFO L358 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2019-11-28 21:16:43,731 INFO L359 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-28 21:16:43,731 INFO L360 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-28 21:16:43,731 INFO L361 BuchiCegarLoop]: Difference is false [2019-11-28 21:16:43,732 INFO L362 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-28 21:16:43,732 INFO L365 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2019-11-28 21:16:43,749 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 17 states. [2019-11-28 21:16:43,795 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-11-28 21:16:43,796 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 21:16:43,796 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 21:16:43,808 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2019-11-28 21:16:43,808 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2019-11-28 21:16:43,809 INFO L424 BuchiCegarLoop]: ======== Iteration 1============ [2019-11-28 21:16:43,809 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 17 states. [2019-11-28 21:16:43,812 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-11-28 21:16:43,812 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 21:16:43,813 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 21:16:43,813 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2019-11-28 21:16:43,813 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2019-11-28 21:16:43,824 INFO L794 eck$LassoCheckResult]: Stem: 8#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 5; 19#L25true call main_#t~ret2 := fibo(main_~x~0);< 11#fiboENTRYtrue [2019-11-28 21:16:43,825 INFO L796 eck$LassoCheckResult]: Loop: 11#fiboENTRYtrue ~n := #in~n; 7#L6true assume !(~n < 1); 10#L8true assume !(1 == ~n); 18#L11true call #t~ret0 := fibo(~n - 1);< 11#fiboENTRYtrue [2019-11-28 21:16:43,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:43,835 INFO L82 PathProgramCache]: Analyzing trace with hash 1021, now seen corresponding path program 1 times [2019-11-28 21:16:43,846 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 21:16:43,860 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624923114] [2019-11-28 21:16:43,860 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 21:16:43,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 21:16:43,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 21:16:43,961 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 21:16:43,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:43,962 INFO L82 PathProgramCache]: Analyzing trace with hash 1420172, now seen corresponding path program 1 times [2019-11-28 21:16:43,963 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 21:16:43,963 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35064405] [2019-11-28 21:16:43,963 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 21:16:43,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 21:16:43,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 21:16:43,976 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 21:16:43,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:43,979 INFO L82 PathProgramCache]: Analyzing trace with hash 943411592, now seen corresponding path program 1 times [2019-11-28 21:16:43,979 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 21:16:43,980 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312729297] [2019-11-28 21:16:43,980 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 21:16:43,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 21:16:43,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 21:16:43,996 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 21:16:44,129 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 21:16:44,130 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 21:16:44,130 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 21:16:44,131 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 21:16:44,131 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-28 21:16:44,131 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:44,131 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 21:16:44,131 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 21:16:44,132 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-2.c_Iteration1_Loop [2019-11-28 21:16:44,132 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 21:16:44,132 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 21:16:44,148 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:44,161 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:44,164 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:44,167 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:44,169 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:44,258 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 21:16:44,259 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 21:16:44,267 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 21:16:44,267 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:44,277 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 21:16:44,278 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_~n=0} Honda state: {fibo_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 21:16:44,295 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 21:16:44,295 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:44,300 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 21:16:44,300 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) [2019-11-28 21:16:44,316 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 21:16:44,316 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:44,321 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 21:16:44,322 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret0=0} Honda state: {fibo_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:44,329 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 21:16:44,329 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 21:16:44,336 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 21:16:44,336 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret1=0} Honda state: {fibo_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:44,350 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 21:16:44,350 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) [2019-11-28 21:16:44,363 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-28 21:16:44,364 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:44,381 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-28 21:16:44,384 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 21:16:44,384 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 21:16:44,384 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 21:16:44,384 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 21:16:44,384 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-28 21:16:44,384 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:44,384 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 21:16:44,385 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 21:16:44,385 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-2.c_Iteration1_Loop [2019-11-28 21:16:44,385 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 21:16:44,385 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 21:16:44,389 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:44,399 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:44,405 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:44,411 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:44,416 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:44,495 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 21:16:44,503 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:44,512 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 21:16:44,516 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 21:16:44,517 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 21:16:44,517 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 21:16:44,518 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 21:16:44,518 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 21:16:44,522 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 21:16:44,522 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 21:16:44,527 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 21:16:44,545 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 21:16:44,547 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 21:16:44,547 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 21:16:44,548 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 21:16:44,548 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 21:16:44,548 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 21:16:44,550 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 21:16:44,551 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:44,555 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 21:16:44,575 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 21:16:44,578 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 21:16:44,578 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 21:16:44,578 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 21:16:44,578 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 21:16:44,579 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 21:16:44,580 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 21:16:44,581 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:44,585 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 21:16:44,604 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 21:16:44,608 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 21:16:44,608 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 21:16:44,608 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 21:16:44,608 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 21:16:44,609 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 21:16:44,611 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 21:16:44,611 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:44,616 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 21:16:44,634 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 21:16:44,637 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 21:16:44,637 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 21:16:44,638 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 21:16:44,638 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 21:16:44,638 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:44,641 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 21:16:44,641 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 21:16:44,649 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-28 21:16:44,657 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-28 21:16:44,657 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 21:16:44,667 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-28 21:16:44,667 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-28 21:16:44,668 INFO L510 LassoAnalysis]: Proved termination. [2019-11-28 21:16:44,669 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_#in~n) = 1*fibo_#in~n Supporting invariants [] [2019-11-28 21:16:44,678 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:44,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:44,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:44,739 INFO L264 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-28 21:16:44,741 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:44,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:44,763 INFO L264 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 21:16:44,764 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:44,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 21:16:44,828 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2019-11-28 21:16:44,829 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 17 states. Second operand 4 states. [2019-11-28 21:16:44,965 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 17 states.. Second operand 4 states. Result 47 states and 59 transitions. Complement of second has 12 states. [2019-11-28 21:16:44,967 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2019-11-28 21:16:44,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2019-11-28 21:16:44,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 10 transitions. [2019-11-28 21:16:44,973 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 2 letters. Loop has 4 letters. [2019-11-28 21:16:44,975 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:16:44,975 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 6 letters. Loop has 4 letters. [2019-11-28 21:16:44,976 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:16:44,976 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 2 letters. Loop has 8 letters. [2019-11-28 21:16:44,976 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:16:44,977 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 47 states and 59 transitions. [2019-11-28 21:16:44,983 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-11-28 21:16:44,991 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 47 states to 24 states and 33 transitions. [2019-11-28 21:16:44,993 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 16 [2019-11-28 21:16:44,993 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 17 [2019-11-28 21:16:44,994 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 33 transitions. [2019-11-28 21:16:44,996 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 21:16:44,996 INFO L688 BuchiCegarLoop]: Abstraction has 24 states and 33 transitions. [2019-11-28 21:16:45,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states and 33 transitions. [2019-11-28 21:16:45,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 19. [2019-11-28 21:16:45,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-11-28 21:16:45,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2019-11-28 21:16:45,033 INFO L711 BuchiCegarLoop]: Abstraction has 19 states and 25 transitions. [2019-11-28 21:16:45,033 INFO L591 BuchiCegarLoop]: Abstraction has 19 states and 25 transitions. [2019-11-28 21:16:45,033 INFO L424 BuchiCegarLoop]: ======== Iteration 2============ [2019-11-28 21:16:45,033 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 19 states and 25 transitions. [2019-11-28 21:16:45,035 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-11-28 21:16:45,035 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 21:16:45,035 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 21:16:45,036 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 21:16:45,037 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 21:16:45,037 INFO L794 eck$LassoCheckResult]: Stem: 120#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 5; 121#L25 call main_#t~ret2 := fibo(main_~x~0);< 125#fiboENTRY ~n := #in~n; 126#L6 assume !(~n < 1); 124#L8 assume !(1 == ~n); 118#L11 call #t~ret0 := fibo(~n - 1);< 127#fiboENTRY ~n := #in~n; 128#L6 assume ~n < 1;#res := 0; 123#fiboFINAL assume true; 117#fiboEXIT >#32#return; 119#L11-1 [2019-11-28 21:16:45,037 INFO L796 eck$LassoCheckResult]: Loop: 119#L11-1 call #t~ret1 := fibo(~n - 2);< 132#fiboENTRY ~n := #in~n; 135#L6 assume !(~n < 1); 134#L8 assume !(1 == ~n); 130#L11 call #t~ret0 := fibo(~n - 1);< 132#fiboENTRY ~n := #in~n; 135#L6 assume ~n < 1;#res := 0; 131#fiboFINAL assume true; 133#fiboEXIT >#32#return; 119#L11-1 [2019-11-28 21:16:45,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:45,038 INFO L82 PathProgramCache]: Analyzing trace with hash 531553871, now seen corresponding path program 1 times [2019-11-28 21:16:45,038 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 21:16:45,038 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151224752] [2019-11-28 21:16:45,039 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 21:16:45,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:45,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:45,149 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 21:16:45,150 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151224752] [2019-11-28 21:16:45,151 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463216141] [2019-11-28 21:16:45,151 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 21:16:45,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:45,178 INFO L264 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-28 21:16:45,179 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:45,204 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 21:16:45,205 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 21:16:45,205 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-11-28 21:16:45,207 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379863230] [2019-11-28 21:16:45,211 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-11-28 21:16:45,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:45,211 INFO L82 PathProgramCache]: Analyzing trace with hash -606345326, now seen corresponding path program 1 times [2019-11-28 21:16:45,212 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 21:16:45,212 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128045297] [2019-11-28 21:16:45,212 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 21:16:45,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:45,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:45,284 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-28 21:16:45,284 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128045297] [2019-11-28 21:16:45,285 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 21:16:45,285 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-28 21:16:45,285 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007900827] [2019-11-28 21:16:45,286 INFO L811 eck$LassoCheckResult]: loop already infeasible [2019-11-28 21:16:45,286 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 21:16:45,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-28 21:16:45,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-11-28 21:16:45,291 INFO L87 Difference]: Start difference. First operand 19 states and 25 transitions. cyclomatic complexity: 8 Second operand 6 states. [2019-11-28 21:16:45,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 21:16:45,401 INFO L93 Difference]: Finished difference Result 25 states and 31 transitions. [2019-11-28 21:16:45,402 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-28 21:16:45,403 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 25 states and 31 transitions. [2019-11-28 21:16:45,405 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-11-28 21:16:45,407 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 25 states to 23 states and 29 transitions. [2019-11-28 21:16:45,407 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 19 [2019-11-28 21:16:45,408 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 19 [2019-11-28 21:16:45,408 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 29 transitions. [2019-11-28 21:16:45,408 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 21:16:45,409 INFO L688 BuchiCegarLoop]: Abstraction has 23 states and 29 transitions. [2019-11-28 21:16:45,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states and 29 transitions. [2019-11-28 21:16:45,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-11-28 21:16:45,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-28 21:16:45,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2019-11-28 21:16:45,414 INFO L711 BuchiCegarLoop]: Abstraction has 23 states and 29 transitions. [2019-11-28 21:16:45,414 INFO L591 BuchiCegarLoop]: Abstraction has 23 states and 29 transitions. [2019-11-28 21:16:45,414 INFO L424 BuchiCegarLoop]: ======== Iteration 3============ [2019-11-28 21:16:45,414 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 23 states and 29 transitions. [2019-11-28 21:16:45,416 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-11-28 21:16:45,416 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 21:16:45,416 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 21:16:45,417 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 21:16:45,417 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1] [2019-11-28 21:16:45,418 INFO L794 eck$LassoCheckResult]: Stem: 220#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 5; 221#L25 call main_#t~ret2 := fibo(main_~x~0);< 225#fiboENTRY ~n := #in~n; 226#L6 assume !(~n < 1); 224#L8 assume !(1 == ~n); 218#L11 call #t~ret0 := fibo(~n - 1);< 227#fiboENTRY ~n := #in~n; 228#L6 assume !(~n < 1); 222#L8 assume 1 == ~n;#res := 1; 223#fiboFINAL assume true; 217#fiboEXIT >#32#return; 219#L11-1 [2019-11-28 21:16:45,418 INFO L796 eck$LassoCheckResult]: Loop: 219#L11-1 call #t~ret1 := fibo(~n - 2);< 232#fiboENTRY ~n := #in~n; 239#L6 assume !(~n < 1); 238#L8 assume !(1 == ~n); 230#L11 call #t~ret0 := fibo(~n - 1);< 232#fiboENTRY ~n := #in~n; 239#L6 assume !(~n < 1); 238#L8 assume 1 == ~n;#res := 1; 236#fiboFINAL assume true; 234#fiboEXIT >#32#return; 219#L11-1 [2019-11-28 21:16:45,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:45,419 INFO L82 PathProgramCache]: Analyzing trace with hash -701674289, now seen corresponding path program 1 times [2019-11-28 21:16:45,419 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 21:16:45,419 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047885623] [2019-11-28 21:16:45,420 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 21:16:45,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:45,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:45,496 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 21:16:45,496 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047885623] [2019-11-28 21:16:45,497 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298416685] [2019-11-28 21:16:45,497 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 21:16:45,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:45,524 INFO L264 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-28 21:16:45,525 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:45,542 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 21:16:45,543 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 21:16:45,544 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-11-28 21:16:45,544 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742189363] [2019-11-28 21:16:45,544 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-11-28 21:16:45,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:45,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1616811028, now seen corresponding path program 1 times [2019-11-28 21:16:45,546 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 21:16:45,546 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989235915] [2019-11-28 21:16:45,546 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 21:16:45,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 21:16:45,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 21:16:45,573 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 21:16:45,719 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 21:16:45,719 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 21:16:45,719 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 21:16:45,720 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 21:16:45,720 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-28 21:16:45,720 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:45,720 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 21:16:45,720 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 21:16:45,721 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-2.c_Iteration3_Loop [2019-11-28 21:16:45,721 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 21:16:45,721 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 21:16:45,722 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:45,732 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:45,744 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:45,746 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 21:16:45,802 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 21:16:45,802 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 21:16:45,817 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 21:16:45,818 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 21:16:45,841 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-28 21:16:45,841 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:46,293 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-28 21:16:46,296 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 21:16:46,296 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 21:16:46,296 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 21:16:46,297 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 21:16:46,297 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-28 21:16:46,297 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:46,297 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 21:16:46,297 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 21:16:46,297 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-2.c_Iteration3_Loop [2019-11-28 21:16:46,298 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 21:16:46,298 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 21:16:46,299 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:46,309 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:46,318 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:46,320 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:46,361 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 21:16:46,361 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) [2019-11-28 21:16:46,375 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 21:16:46,377 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 21:16:46,377 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 21:16:46,378 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 21:16:46,378 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 21:16:46,378 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 21:16:46,379 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 21:16:46,379 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:46,382 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:46,390 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 21:16:46,393 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 21:16:46,393 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 21:16:46,393 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 21:16:46,393 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 21:16:46,393 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 21:16:46,396 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 21:16:46,396 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 21:16:46,399 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-28 21:16:46,420 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-28 21:16:46,420 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 21:16:46,428 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-28 21:16:46,428 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-28 21:16:46,428 INFO L510 LassoAnalysis]: Proved termination. [2019-11-28 21:16:46,428 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:46,436 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-28 21:16:46,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:46,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:46,481 INFO L264 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-28 21:16:46,482 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:46,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:46,536 INFO L264 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-28 21:16:46,537 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:46,598 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 21:16:46,599 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 5 loop predicates [2019-11-28 21:16:46,599 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 23 states and 29 transitions. cyclomatic complexity: 8 Second operand 7 states. [2019-11-28 21:16:46,825 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 23 states and 29 transitions. cyclomatic complexity: 8. Second operand 7 states. Result 134 states and 182 transitions. Complement of second has 28 states. [2019-11-28 21:16:46,827 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2019-11-28 21:16:46,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2019-11-28 21:16:46,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 34 transitions. [2019-11-28 21:16:46,829 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 34 transitions. Stem has 11 letters. Loop has 10 letters. [2019-11-28 21:16:46,830 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:16:46,830 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 34 transitions. Stem has 21 letters. Loop has 10 letters. [2019-11-28 21:16:46,831 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:16:46,831 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 34 transitions. Stem has 11 letters. Loop has 20 letters. [2019-11-28 21:16:46,832 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:16:46,832 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 134 states and 182 transitions. [2019-11-28 21:16:46,842 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2019-11-28 21:16:46,849 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 134 states to 107 states and 151 transitions. [2019-11-28 21:16:46,849 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 63 [2019-11-28 21:16:46,850 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 68 [2019-11-28 21:16:46,851 INFO L73 IsDeterministic]: Start isDeterministic. Operand 107 states and 151 transitions. [2019-11-28 21:16:46,851 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 21:16:46,851 INFO L688 BuchiCegarLoop]: Abstraction has 107 states and 151 transitions. [2019-11-28 21:16:46,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states and 151 transitions. [2019-11-28 21:16:46,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 93. [2019-11-28 21:16:46,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-11-28 21:16:46,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 125 transitions. [2019-11-28 21:16:46,872 INFO L711 BuchiCegarLoop]: Abstraction has 93 states and 125 transitions. [2019-11-28 21:16:46,872 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 21:16:46,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-28 21:16:46,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2019-11-28 21:16:46,873 INFO L87 Difference]: Start difference. First operand 93 states and 125 transitions. Second operand 8 states. [2019-11-28 21:16:47,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 21:16:47,048 INFO L93 Difference]: Finished difference Result 108 states and 146 transitions. [2019-11-28 21:16:47,049 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-28 21:16:47,049 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 108 states and 146 transitions. [2019-11-28 21:16:47,058 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2019-11-28 21:16:47,067 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 108 states to 105 states and 143 transitions. [2019-11-28 21:16:47,067 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 68 [2019-11-28 21:16:47,067 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 68 [2019-11-28 21:16:47,068 INFO L73 IsDeterministic]: Start isDeterministic. Operand 105 states and 143 transitions. [2019-11-28 21:16:47,069 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 21:16:47,070 INFO L688 BuchiCegarLoop]: Abstraction has 105 states and 143 transitions. [2019-11-28 21:16:47,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states and 143 transitions. [2019-11-28 21:16:47,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 93. [2019-11-28 21:16:47,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-11-28 21:16:47,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 124 transitions. [2019-11-28 21:16:47,093 INFO L711 BuchiCegarLoop]: Abstraction has 93 states and 124 transitions. [2019-11-28 21:16:47,094 INFO L591 BuchiCegarLoop]: Abstraction has 93 states and 124 transitions. [2019-11-28 21:16:47,094 INFO L424 BuchiCegarLoop]: ======== Iteration 4============ [2019-11-28 21:16:47,094 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 93 states and 124 transitions. [2019-11-28 21:16:47,098 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2019-11-28 21:16:47,098 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 21:16:47,098 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 21:16:47,102 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [5, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 21:16:47,102 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [6, 5, 5, 3, 3, 3, 3, 2, 2, 2, 1] [2019-11-28 21:16:47,103 INFO L794 eck$LassoCheckResult]: Stem: 744#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 5; 745#L25 call main_#t~ret2 := fibo(main_~x~0);< 769#fiboENTRY ~n := #in~n; 793#L6 assume !(~n < 1); 752#L8 assume !(1 == ~n); 753#L11 call #t~ret0 := fibo(~n - 1);< 759#fiboENTRY ~n := #in~n; 761#L6 assume !(~n < 1); 772#L8 assume !(1 == ~n); 760#L11 call #t~ret0 := fibo(~n - 1);< 759#fiboENTRY ~n := #in~n; 761#L6 assume !(~n < 1); 772#L8 assume !(1 == ~n); 760#L11 call #t~ret0 := fibo(~n - 1);< 759#fiboENTRY ~n := #in~n; 762#L6 assume !(~n < 1); 796#L8 assume 1 == ~n;#res := 1; 795#fiboFINAL assume true; 794#fiboEXIT >#32#return; 757#L11-1 call #t~ret1 := fibo(~n - 2);< 756#fiboENTRY ~n := #in~n; 758#L6 assume ~n < 1;#res := 0; 823#fiboFINAL assume true; 817#fiboEXIT >#34#return; 814#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret0;havoc #t~ret1; 812#fiboFINAL assume true; 802#fiboEXIT >#32#return; 804#L11-1 [2019-11-28 21:16:47,103 INFO L796 eck$LassoCheckResult]: Loop: 804#L11-1 call #t~ret1 := fibo(~n - 2);< 810#fiboENTRY ~n := #in~n; 818#L6 assume !(~n < 1); 815#L8 assume !(1 == ~n); 808#L11 call #t~ret0 := fibo(~n - 1);< 810#fiboENTRY ~n := #in~n; 818#L6 assume !(~n < 1); 815#L8 assume !(1 == ~n); 808#L11 call #t~ret0 := fibo(~n - 1);< 810#fiboENTRY ~n := #in~n; 818#L6 assume !(~n < 1); 815#L8 assume 1 == ~n;#res := 1; 816#fiboFINAL assume true; 813#fiboEXIT >#32#return; 804#L11-1 call #t~ret1 := fibo(~n - 2);< 810#fiboENTRY ~n := #in~n; 818#L6 assume !(~n < 1); 815#L8 assume !(1 == ~n); 808#L11 call #t~ret0 := fibo(~n - 1);< 810#fiboENTRY ~n := #in~n; 818#L6 assume !(~n < 1); 815#L8 assume 1 == ~n;#res := 1; 816#fiboFINAL assume true; 813#fiboEXIT >#32#return; 804#L11-1 call #t~ret1 := fibo(~n - 2);< 810#fiboENTRY ~n := #in~n; 818#L6 assume ~n < 1;#res := 0; 819#fiboFINAL assume true; 821#fiboEXIT >#34#return; 809#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret0;havoc #t~ret1; 811#fiboFINAL assume true; 807#fiboEXIT >#34#return; 809#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret0;havoc #t~ret1; 811#fiboFINAL assume true; 807#fiboEXIT >#32#return; 804#L11-1 [2019-11-28 21:16:47,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:47,103 INFO L82 PathProgramCache]: Analyzing trace with hash -240562386, now seen corresponding path program 1 times [2019-11-28 21:16:47,103 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 21:16:47,106 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705973421] [2019-11-28 21:16:47,106 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 21:16:47,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:47,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:47,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:47,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:47,276 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-28 21:16:47,277 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705973421] [2019-11-28 21:16:47,277 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378263862] [2019-11-28 21:16:47,277 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 21:16:47,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:47,307 INFO L264 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-28 21:16:47,309 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:47,329 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-28 21:16:47,329 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 21:16:47,330 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2019-11-28 21:16:47,330 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377029994] [2019-11-28 21:16:47,330 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-11-28 21:16:47,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:47,331 INFO L82 PathProgramCache]: Analyzing trace with hash 1408722332, now seen corresponding path program 1 times [2019-11-28 21:16:47,331 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 21:16:47,331 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624563737] [2019-11-28 21:16:47,331 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 21:16:47,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:47,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:47,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:47,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:47,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:47,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:47,496 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 26 proven. 13 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-11-28 21:16:47,497 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624563737] [2019-11-28 21:16:47,497 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855803752] [2019-11-28 21:16:47,497 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 21:16:47,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:47,527 INFO L264 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-28 21:16:47,529 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:47,571 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 25 proven. 15 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-11-28 21:16:47,572 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 21:16:47,572 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2019-11-28 21:16:47,572 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829617077] [2019-11-28 21:16:47,573 INFO L811 eck$LassoCheckResult]: loop already infeasible [2019-11-28 21:16:47,573 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 21:16:47,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-28 21:16:47,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2019-11-28 21:16:47,574 INFO L87 Difference]: Start difference. First operand 93 states and 124 transitions. cyclomatic complexity: 36 Second operand 12 states. [2019-11-28 21:16:47,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 21:16:47,804 INFO L93 Difference]: Finished difference Result 115 states and 158 transitions. [2019-11-28 21:16:47,804 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-28 21:16:47,805 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 115 states and 158 transitions. [2019-11-28 21:16:47,808 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 15 [2019-11-28 21:16:47,811 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 115 states to 113 states and 156 transitions. [2019-11-28 21:16:47,811 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 76 [2019-11-28 21:16:47,812 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 76 [2019-11-28 21:16:47,812 INFO L73 IsDeterministic]: Start isDeterministic. Operand 113 states and 156 transitions. [2019-11-28 21:16:47,812 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 21:16:47,812 INFO L688 BuchiCegarLoop]: Abstraction has 113 states and 156 transitions. [2019-11-28 21:16:47,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states and 156 transitions. [2019-11-28 21:16:47,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2019-11-28 21:16:47,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2019-11-28 21:16:47,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 156 transitions. [2019-11-28 21:16:47,823 INFO L711 BuchiCegarLoop]: Abstraction has 113 states and 156 transitions. [2019-11-28 21:16:47,823 INFO L591 BuchiCegarLoop]: Abstraction has 113 states and 156 transitions. [2019-11-28 21:16:47,823 INFO L424 BuchiCegarLoop]: ======== Iteration 5============ [2019-11-28 21:16:47,823 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 113 states and 156 transitions. [2019-11-28 21:16:47,825 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 15 [2019-11-28 21:16:47,825 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 21:16:47,825 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 21:16:47,827 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [6, 5, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 21:16:47,827 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2019-11-28 21:16:47,827 INFO L794 eck$LassoCheckResult]: Stem: 1248#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 5; 1249#L25 call main_#t~ret2 := fibo(main_~x~0);< 1278#fiboENTRY ~n := #in~n; 1308#L6 assume !(~n < 1); 1307#L8 assume !(1 == ~n); 1256#L11 call #t~ret0 := fibo(~n - 1);< 1273#fiboENTRY ~n := #in~n; 1274#L6 assume !(~n < 1); 1255#L8 assume !(1 == ~n); 1257#L11 call #t~ret0 := fibo(~n - 1);< 1301#fiboENTRY ~n := #in~n; 1305#L6 assume !(~n < 1); 1303#L8 assume !(1 == ~n); 1263#L11 call #t~ret0 := fibo(~n - 1);< 1301#fiboENTRY ~n := #in~n; 1305#L6 assume !(~n < 1); 1303#L8 assume !(1 == ~n); 1263#L11 call #t~ret0 := fibo(~n - 1);< 1301#fiboENTRY ~n := #in~n; 1306#L6 assume !(~n < 1); 1304#L8 assume 1 == ~n;#res := 1; 1302#fiboFINAL assume true; 1300#fiboEXIT >#32#return; 1243#L11-1 call #t~ret1 := fibo(~n - 2);< 1298#fiboENTRY ~n := #in~n; 1345#L6 assume ~n < 1;#res := 0; 1344#fiboFINAL assume true; 1342#fiboEXIT >#34#return; 1340#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret0;havoc #t~ret1; 1339#fiboFINAL assume true; 1332#fiboEXIT >#32#return; 1260#L11-1 [2019-11-28 21:16:47,827 INFO L796 eck$LassoCheckResult]: Loop: 1260#L11-1 call #t~ret1 := fibo(~n - 2);< 1276#fiboENTRY ~n := #in~n; 1309#L6 assume !(~n < 1); 1311#L8 assume !(1 == ~n); 1262#L11 call #t~ret0 := fibo(~n - 1);< 1276#fiboENTRY ~n := #in~n; 1309#L6 assume !(~n < 1); 1311#L8 assume !(1 == ~n); 1262#L11 call #t~ret0 := fibo(~n - 1);< 1276#fiboENTRY ~n := #in~n; 1309#L6 assume !(~n < 1); 1311#L8 assume 1 == ~n;#res := 1; 1254#fiboFINAL assume true; 1346#fiboEXIT >#32#return; 1252#L11-1 call #t~ret1 := fibo(~n - 2);< 1271#fiboENTRY ~n := #in~n; 1272#L6 assume ~n < 1;#res := 0; 1310#fiboFINAL assume true; 1347#fiboEXIT >#34#return; 1244#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret0;havoc #t~ret1; 1258#fiboFINAL assume true; 1264#fiboEXIT >#32#return; 1260#L11-1 [2019-11-28 21:16:47,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:47,828 INFO L82 PathProgramCache]: Analyzing trace with hash 1087292419, now seen corresponding path program 2 times [2019-11-28 21:16:47,828 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 21:16:47,828 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701666278] [2019-11-28 21:16:47,828 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 21:16:47,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 21:16:47,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 21:16:47,845 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 21:16:47,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:47,845 INFO L82 PathProgramCache]: Analyzing trace with hash 22774646, now seen corresponding path program 2 times [2019-11-28 21:16:47,845 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 21:16:47,846 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777567784] [2019-11-28 21:16:47,846 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 21:16:47,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 21:16:47,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 21:16:47,857 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 21:16:47,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:47,858 INFO L82 PathProgramCache]: Analyzing trace with hash 560101880, now seen corresponding path program 3 times [2019-11-28 21:16:47,858 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 21:16:47,858 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381930136] [2019-11-28 21:16:47,859 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 21:16:47,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:47,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:47,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:47,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:47,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:47,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:48,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:48,010 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 52 proven. 67 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2019-11-28 21:16:48,011 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381930136] [2019-11-28 21:16:48,011 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682517285] [2019-11-28 21:16:48,011 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 21:16:48,061 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-11-28 21:16:48,061 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 21:16:48,062 INFO L264 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-28 21:16:48,065 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:48,114 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 63 proven. 69 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-11-28 21:16:48,115 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 21:16:48,115 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2019-11-28 21:16:48,115 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816362878] [2019-11-28 21:16:48,381 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 21:16:48,381 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 21:16:48,381 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 21:16:48,381 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 21:16:48,381 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-28 21:16:48,381 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:48,381 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 21:16:48,381 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 21:16:48,382 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-2.c_Iteration5_Loop [2019-11-28 21:16:48,382 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 21:16:48,382 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 21:16:48,383 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:48,387 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:48,389 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:48,392 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:48,467 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 21:16:48,467 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:48,473 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 21:16:48,474 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 21:16:48,477 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 21:16:48,478 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret1=0} Honda state: {fibo_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:48,484 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 21:16:48,485 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 21:16:48,487 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 21:16:48,488 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:48,494 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 21:16:48,494 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 21:16:48,497 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 21:16:48,497 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret0=1} Honda state: {fibo_#t~ret0=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:48,506 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 21:16:48,506 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:48,525 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-28 21:16:48,525 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 21:16:49,032 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-28 21:16:49,034 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 21:16:49,034 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 21:16:49,034 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 21:16:49,034 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 21:16:49,034 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-28 21:16:49,035 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:49,035 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 21:16:49,035 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 21:16:49,035 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-2.c_Iteration5_Loop [2019-11-28 21:16:49,035 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 21:16:49,035 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 21:16:49,036 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:49,038 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:49,041 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:49,053 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:49,131 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 21:16:49,131 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:49,136 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 21:16:49,137 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 21:16:49,137 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 21:16:49,137 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 21:16:49,137 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 21:16:49,138 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 21:16:49,139 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 21:16:49,139 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 21:16:49,143 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 21:16:49,150 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 21:16:49,152 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 21:16:49,152 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 21:16:49,152 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 21:16:49,152 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 21:16:49,153 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 21:16:49,154 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 21:16:49,154 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 21:16:49,156 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 21:16:49,173 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 21:16:49,175 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 21:16:49,175 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 21:16:49,175 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 21:16:49,175 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 21:16:49,175 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 21:16:49,177 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 21:16:49,177 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:49,182 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-28 21:16:49,185 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2019-11-28 21:16:49,185 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) [2019-11-28 21:16:49,200 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-28 21:16:49,200 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-28 21:16:49,200 INFO L510 LassoAnalysis]: Proved termination. [2019-11-28 21:16:49,201 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [MP z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (31)] Exception during sending of exit command (exit): Broken pipe [2019-11-28 21:16:49,203 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed Waiting until toolchain timeout for monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:49,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:49,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:49,264 INFO L264 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-28 21:16:49,267 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:49,287 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 21:16:49,293 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 21:16:49,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:49,319 INFO L264 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-28 21:16:49,321 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:49,390 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-28 21:16:49,391 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 6 loop predicates [2019-11-28 21:16:49,391 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 113 states and 156 transitions. cyclomatic complexity: 49 Second operand 8 states. [2019-11-28 21:16:49,595 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 113 states and 156 transitions. cyclomatic complexity: 49. Second operand 8 states. Result 182 states and 248 transitions. Complement of second has 33 states. [2019-11-28 21:16:49,595 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 9 states 2 stem states 6 non-accepting loop states 1 accepting loop states [2019-11-28 21:16:49,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-11-28 21:16:49,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 36 transitions. [2019-11-28 21:16:49,596 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 36 transitions. Stem has 31 letters. Loop has 22 letters. [2019-11-28 21:16:49,597 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:16:49,597 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-28 21:16:49,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:49,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:49,650 INFO L264 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-28 21:16:49,653 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:49,678 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 21:16:49,681 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 21:16:49,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:49,707 INFO L264 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-28 21:16:49,708 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:49,769 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-28 21:16:49,769 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 6 loop predicates [2019-11-28 21:16:49,770 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 113 states and 156 transitions. cyclomatic complexity: 49 Second operand 8 states. [2019-11-28 21:16:49,976 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 113 states and 156 transitions. cyclomatic complexity: 49. Second operand 8 states. Result 307 states and 417 transitions. Complement of second has 25 states. [2019-11-28 21:16:49,977 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2019-11-28 21:16:49,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-11-28 21:16:49,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 23 transitions. [2019-11-28 21:16:49,978 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 23 transitions. Stem has 31 letters. Loop has 22 letters. [2019-11-28 21:16:49,979 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:16:49,979 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-28 21:16:49,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:50,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:50,036 INFO L264 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-28 21:16:50,038 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:50,061 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 21:16:50,064 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 21:16:50,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:50,106 INFO L264 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-28 21:16:50,108 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:50,178 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-28 21:16:50,179 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 6 loop predicates [2019-11-28 21:16:50,179 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 113 states and 156 transitions. cyclomatic complexity: 49 Second operand 8 states. [2019-11-28 21:16:50,466 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 113 states and 156 transitions. cyclomatic complexity: 49. Second operand 8 states. Result 1077 states and 1514 transitions. Complement of second has 130 states. [2019-11-28 21:16:50,467 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 9 states 2 stem states 6 non-accepting loop states 1 accepting loop states [2019-11-28 21:16:50,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-11-28 21:16:50,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 41 transitions. [2019-11-28 21:16:50,468 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 41 transitions. Stem has 31 letters. Loop has 22 letters. [2019-11-28 21:16:50,469 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:16:50,469 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 41 transitions. Stem has 53 letters. Loop has 22 letters. [2019-11-28 21:16:50,470 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:16:50,470 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 41 transitions. Stem has 31 letters. Loop has 44 letters. [2019-11-28 21:16:50,472 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:16:50,473 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1077 states and 1514 transitions. [2019-11-28 21:16:50,492 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 58 [2019-11-28 21:16:50,509 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1077 states to 604 states and 937 transitions. [2019-11-28 21:16:50,509 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 242 [2019-11-28 21:16:50,511 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 271 [2019-11-28 21:16:50,511 INFO L73 IsDeterministic]: Start isDeterministic. Operand 604 states and 937 transitions. [2019-11-28 21:16:50,512 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 21:16:50,512 INFO L688 BuchiCegarLoop]: Abstraction has 604 states and 937 transitions. [2019-11-28 21:16:50,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states and 937 transitions. [2019-11-28 21:16:50,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 475. [2019-11-28 21:16:50,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 475 states. [2019-11-28 21:16:50,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 723 transitions. [2019-11-28 21:16:50,557 INFO L711 BuchiCegarLoop]: Abstraction has 475 states and 723 transitions. [2019-11-28 21:16:50,557 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 21:16:50,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-28 21:16:50,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2019-11-28 21:16:50,558 INFO L87 Difference]: Start difference. First operand 475 states and 723 transitions. Second operand 16 states. [2019-11-28 21:16:50,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 21:16:50,966 INFO L93 Difference]: Finished difference Result 150 states and 188 transitions. [2019-11-28 21:16:50,967 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-28 21:16:50,967 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 150 states and 188 transitions. [2019-11-28 21:16:50,969 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2019-11-28 21:16:50,971 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 150 states to 150 states and 188 transitions. [2019-11-28 21:16:50,971 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 80 [2019-11-28 21:16:50,972 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 105 [2019-11-28 21:16:50,972 INFO L73 IsDeterministic]: Start isDeterministic. Operand 150 states and 188 transitions. [2019-11-28 21:16:50,972 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 21:16:50,973 INFO L688 BuchiCegarLoop]: Abstraction has 150 states and 188 transitions. [2019-11-28 21:16:50,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states and 188 transitions. [2019-11-28 21:16:50,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 121. [2019-11-28 21:16:50,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2019-11-28 21:16:50,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 142 transitions. [2019-11-28 21:16:50,979 INFO L711 BuchiCegarLoop]: Abstraction has 121 states and 142 transitions. [2019-11-28 21:16:50,979 INFO L591 BuchiCegarLoop]: Abstraction has 121 states and 142 transitions. [2019-11-28 21:16:50,979 INFO L424 BuchiCegarLoop]: ======== Iteration 6============ [2019-11-28 21:16:50,979 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 121 states and 142 transitions. [2019-11-28 21:16:50,981 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2019-11-28 21:16:50,981 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 21:16:50,981 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 21:16:50,982 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [9, 7, 6, 6, 5, 3, 3, 2, 2, 2, 1, 1, 1] [2019-11-28 21:16:50,982 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2019-11-28 21:16:50,983 INFO L794 eck$LassoCheckResult]: Stem: 4528#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 5; 4529#L25 call main_#t~ret2 := fibo(main_~x~0);< 4551#fiboENTRY ~n := #in~n; 4549#L6 assume !(~n < 1); 4550#L8 assume !(1 == ~n); 4540#L11 call #t~ret0 := fibo(~n - 1);< 4539#fiboENTRY ~n := #in~n; 4541#L6 assume !(~n < 1); 4574#L8 assume !(1 == ~n); 4533#L11 call #t~ret0 := fibo(~n - 1);< 4548#fiboENTRY ~n := #in~n; 4572#L6 assume !(~n < 1); 4532#L8 assume !(1 == ~n); 4534#L11 call #t~ret0 := fibo(~n - 1);< 4548#fiboENTRY ~n := #in~n; 4572#L6 assume !(~n < 1); 4532#L8 assume !(1 == ~n); 4534#L11 call #t~ret0 := fibo(~n - 1);< 4548#fiboENTRY ~n := #in~n; 4573#L6 assume !(~n < 1); 4610#L8 assume 1 == ~n;#res := 1; 4609#fiboFINAL assume true; 4608#fiboEXIT >#32#return; 4605#L11-1 call #t~ret1 := fibo(~n - 2);< 4607#fiboENTRY ~n := #in~n; 4629#L6 assume ~n < 1;#res := 0; 4627#fiboFINAL assume true; 4625#fiboEXIT >#34#return; 4624#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret0;havoc #t~ret1; 4623#fiboFINAL assume true; 4595#fiboEXIT >#32#return; 4576#L11-1 call #t~ret1 := fibo(~n - 2);< 4587#fiboENTRY ~n := #in~n; 4628#L6 assume ~n < 1;#res := 0; 4626#fiboFINAL assume true; 4585#fiboEXIT >#34#return; 4583#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret0;havoc #t~ret1; 4581#fiboFINAL assume true; 4575#fiboEXIT >#32#return; 4562#L11-1 call #t~ret1 := fibo(~n - 2);< 4568#fiboENTRY ~n := #in~n; 4567#L6 assume !(~n < 1); 4564#L8 assume !(1 == ~n); 4566#L11 call #t~ret0 := fibo(~n - 1);< 4620#fiboENTRY ~n := #in~n; 4633#L6 assume !(~n < 1); 4634#L8 assume !(1 == ~n); 4520#L11 call #t~ret0 := fibo(~n - 1);< 4547#fiboENTRY [2019-11-28 21:16:50,983 INFO L796 eck$LassoCheckResult]: Loop: 4547#fiboENTRY ~n := #in~n; 4636#L6 assume !(~n < 1); 4631#L8 assume !(1 == ~n); 4519#L11 call #t~ret0 := fibo(~n - 1);< 4547#fiboENTRY [2019-11-28 21:16:50,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:50,983 INFO L82 PathProgramCache]: Analyzing trace with hash -918730881, now seen corresponding path program 4 times [2019-11-28 21:16:50,984 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 21:16:50,984 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40240930] [2019-11-28 21:16:50,984 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 21:16:50,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:51,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:51,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:51,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:51,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:51,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:51,120 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 73 proven. 15 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2019-11-28 21:16:51,120 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40240930] [2019-11-28 21:16:51,121 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66427362] [2019-11-28 21:16:51,121 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 21:16:51,154 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-28 21:16:51,155 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 21:16:51,155 INFO L264 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-28 21:16:51,157 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:51,237 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 65 proven. 42 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-11-28 21:16:51,237 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 21:16:51,237 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2019-11-28 21:16:51,238 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714028429] [2019-11-28 21:16:51,238 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-11-28 21:16:51,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:51,238 INFO L82 PathProgramCache]: Analyzing trace with hash 1420172, now seen corresponding path program 2 times [2019-11-28 21:16:51,239 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 21:16:51,239 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602457569] [2019-11-28 21:16:51,239 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 21:16:51,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 21:16:51,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 21:16:51,243 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 21:16:51,271 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 21:16:51,271 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 21:16:51,271 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 21:16:51,271 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 21:16:51,271 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-28 21:16:51,271 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:51,272 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 21:16:51,272 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 21:16:51,272 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-2.c_Iteration6_Loop [2019-11-28 21:16:51,272 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 21:16:51,272 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 21:16:51,273 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:51,275 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:51,277 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:51,278 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:51,285 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:51,320 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 21:16:51,320 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 21:16:51,331 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 21:16:51,332 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 21:16:51,334 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 21:16:51,335 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) Waiting until toolchain timeout for monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:51,340 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 21:16:51,341 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 21:16:51,343 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 21:16:51,343 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) Waiting until toolchain timeout for monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:51,349 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 21:16:51,349 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 21:16:51,351 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 21:16:51,351 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) Waiting until toolchain timeout for monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:51,356 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 21:16:51,356 INFO L160 nArgumentSynthesizer]: Using integer mode. 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) Waiting until toolchain timeout for monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:51,366 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-28 21:16:51,366 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 21:16:51,408 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-28 21:16:51,410 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 21:16:51,410 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 21:16:51,410 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 21:16:51,411 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 21:16:51,411 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-28 21:16:51,411 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:51,411 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 21:16:51,411 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 21:16:51,411 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-2.c_Iteration6_Loop [2019-11-28 21:16:51,411 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 21:16:51,411 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 21:16:51,412 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:51,421 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:51,423 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:51,425 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:51,432 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 21:16:51,477 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 21:16:51,478 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) Waiting until toolchain timeout for monitored process 39 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:51,485 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 21:16:51,487 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 21:16:51,487 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 21:16:51,487 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 21:16:51,487 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 21:16:51,487 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 21:16:51,488 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 21:16:51,488 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 21:16:51,494 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 21:16:51,511 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 21:16:51,512 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 21:16:51,512 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 21:16:51,512 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 21:16:51,512 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 21:16:51,513 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 21:16:51,513 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 21:16:51,513 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 21:16:51,514 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:51,521 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 21:16:51,522 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 21:16:51,522 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 21:16:51,522 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 21:16:51,522 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 21:16:51,522 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 21:16:51,523 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 21:16:51,523 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 21:16:51,525 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 21:16:51,529 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 21:16:51,531 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 21:16:51,531 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 21:16:51,531 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 21:16:51,531 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 21:16:51,531 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 21:16:51,532 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 21:16:51,532 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 21:16:51,535 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-28 21:16:51,537 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-28 21:16:51,538 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 21:16:51,543 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-28 21:16:51,544 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-28 21:16:51,544 INFO L510 LassoAnalysis]: Proved termination. [2019-11-28 21:16:51,544 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_#in~n) = 1*fibo_#in~n Supporting invariants [] [2019-11-28 21:16:51,545 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-28 21:16:51,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:51,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:51,620 INFO L264 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-28 21:16:51,622 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:51,647 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 21:16:51,649 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 21:16:51,650 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 21:16:51,653 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 21:16:51,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:51,664 INFO L264 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 21:16:51,665 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:51,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 21:16:51,681 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2019-11-28 21:16:51,681 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 121 states and 142 transitions. cyclomatic complexity: 24 Second operand 5 states. [2019-11-28 21:16:51,766 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 121 states and 142 transitions. cyclomatic complexity: 24. Second operand 5 states. Result 131 states and 152 transitions. Complement of second has 13 states. [2019-11-28 21:16:51,771 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2019-11-28 21:16:51,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-11-28 21:16:51,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 12 transitions. [2019-11-28 21:16:51,772 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 12 transitions. Stem has 48 letters. Loop has 4 letters. [2019-11-28 21:16:51,772 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:16:51,772 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-28 21:16:51,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:51,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:51,833 INFO L264 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-28 21:16:51,835 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:51,858 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 21:16:51,860 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 21:16:51,862 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 21:16:51,864 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 21:16:51,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:51,874 INFO L264 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 21:16:51,875 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:51,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 21:16:51,906 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 3 loop predicates [2019-11-28 21:16:51,907 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 121 states and 142 transitions. cyclomatic complexity: 24 Second operand 5 states. [2019-11-28 21:16:51,963 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 121 states and 142 transitions. cyclomatic complexity: 24. Second operand 5 states. Result 131 states and 152 transitions. Complement of second has 13 states. [2019-11-28 21:16:51,963 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2019-11-28 21:16:51,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-11-28 21:16:51,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 12 transitions. [2019-11-28 21:16:51,964 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 12 transitions. Stem has 48 letters. Loop has 4 letters. [2019-11-28 21:16:51,964 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:16:51,964 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-28 21:16:51,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 21:16:52,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:52,030 INFO L264 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-28 21:16:52,032 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:52,052 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 21:16:52,054 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 21:16:52,055 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 21:16:52,057 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 21:16:52,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 21:16:52,066 INFO L264 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 21:16:52,067 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 21:16:52,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 21:16:52,086 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2019-11-28 21:16:52,086 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 121 states and 142 transitions. cyclomatic complexity: 24 Second operand 5 states. [2019-11-28 21:16:52,174 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 121 states and 142 transitions. cyclomatic complexity: 24. Second operand 5 states. Result 170 states and 193 transitions. Complement of second has 14 states. [2019-11-28 21:16:52,176 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2019-11-28 21:16:52,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-11-28 21:16:52,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 20 transitions. [2019-11-28 21:16:52,177 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 20 transitions. Stem has 48 letters. Loop has 4 letters. [2019-11-28 21:16:52,177 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:16:52,178 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 20 transitions. Stem has 52 letters. Loop has 4 letters. [2019-11-28 21:16:52,178 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:16:52,178 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 20 transitions. Stem has 48 letters. Loop has 8 letters. [2019-11-28 21:16:52,179 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 21:16:52,179 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 170 states and 193 transitions. [2019-11-28 21:16:52,182 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2019-11-28 21:16:52,182 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 170 states to 0 states and 0 transitions. [2019-11-28 21:16:52,182 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2019-11-28 21:16:52,182 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2019-11-28 21:16:52,183 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2019-11-28 21:16:52,183 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2019-11-28 21:16:52,183 INFO L688 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-28 21:16:52,183 INFO L711 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-28 21:16:52,183 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 21:16:52,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-28 21:16:52,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2019-11-28 21:16:52,184 INFO L87 Difference]: Start difference. First operand 0 states and 0 transitions. Second operand 19 states. [2019-11-28 21:16:52,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 21:16:52,185 INFO L93 Difference]: Finished difference Result 0 states and 0 transitions. [2019-11-28 21:16:52,185 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-28 21:16:52,185 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 0 states and 0 transitions. [2019-11-28 21:16:52,185 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2019-11-28 21:16:52,185 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 0 states to 0 states and 0 transitions. [2019-11-28 21:16:52,185 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2019-11-28 21:16:52,186 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2019-11-28 21:16:52,186 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2019-11-28 21:16:52,186 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2019-11-28 21:16:52,186 INFO L688 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-28 21:16:52,186 INFO L711 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-28 21:16:52,186 INFO L591 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-28 21:16:52,186 INFO L424 BuchiCegarLoop]: ======== Iteration 7============ [2019-11-28 21:16:52,186 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2019-11-28 21:16:52,187 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2019-11-28 21:16:52,187 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2019-11-28 21:16:52,195 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 28.11 09:16:52 BoogieIcfgContainer [2019-11-28 21:16:52,195 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2019-11-28 21:16:52,195 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-28 21:16:52,195 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-28 21:16:52,196 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-28 21:16:52,196 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 09:16:43" (3/4) ... [2019-11-28 21:16:52,200 INFO L140 WitnessPrinter]: No result that supports witness generation found [2019-11-28 21:16:52,200 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-28 21:16:52,203 INFO L168 Benchmark]: Toolchain (without parser) took 9160.81 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 300.9 MB). Free memory was 956.3 MB in the beginning and 939.5 MB in the end (delta: 16.8 MB). Peak memory consumption was 317.8 MB. Max. memory is 11.5 GB. [2019-11-28 21:16:52,203 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 987.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 21:16:52,204 INFO L168 Benchmark]: CACSL2BoogieTranslator took 293.57 ms. Allocated memory is still 1.0 GB. Free memory was 956.3 MB in the beginning and 945.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-11-28 21:16:52,204 INFO L168 Benchmark]: Boogie Procedure Inliner took 28.14 ms. Allocated memory is still 1.0 GB. Free memory is still 945.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 21:16:52,205 INFO L168 Benchmark]: Boogie Preprocessor took 74.89 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 144.2 MB). Free memory was 945.6 MB in the beginning and 1.1 GB in the end (delta: -195.2 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. [2019-11-28 21:16:52,206 INFO L168 Benchmark]: RCFGBuilder took 226.28 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 24.1 MB). Peak memory consumption was 24.1 MB. Max. memory is 11.5 GB. [2019-11-28 21:16:52,208 INFO L168 Benchmark]: BuchiAutomizer took 8527.74 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 156.8 MB). Free memory was 1.1 GB in the beginning and 939.5 MB in the end (delta: 177.2 MB). Peak memory consumption was 334.0 MB. Max. memory is 11.5 GB. [2019-11-28 21:16:52,208 INFO L168 Benchmark]: Witness Printer took 4.70 ms. Allocated memory is still 1.3 GB. Free memory is still 939.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 21:16:52,213 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 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 293.57 ms. Allocated memory is still 1.0 GB. Free memory was 956.3 MB in the beginning and 945.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 28.14 ms. Allocated memory is still 1.0 GB. Free memory is still 945.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 74.89 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 144.2 MB). Free memory was 945.6 MB in the beginning and 1.1 GB in the end (delta: -195.2 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. * RCFGBuilder took 226.28 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 24.1 MB). Peak memory consumption was 24.1 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 8527.74 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 156.8 MB). Free memory was 1.1 GB in the beginning and 939.5 MB in the end (delta: 177.2 MB). Peak memory consumption was 334.0 MB. Max. memory is 11.5 GB. * Witness Printer took 4.70 ms. Allocated memory is still 1.3 GB. Free memory is still 939.5 MB. 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 9 terminating modules (5 trivial, 2 deterministic, 2 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 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. 5 modules have a trivial ranking function, the largest among these consists of 19 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 8.4s and 7 iterations. TraceHistogramMax:9. Analysis of lassos took 4.5s. Construction of modules took 0.8s. Büchi inclusion checks took 2.6s. Highest rank in rank-based complementation 3. Minimization of det autom 2. Minimization of nondet autom 7. Automata minimization 0.1s AutomataMinimizationTime, 7 MinimizatonAttempts, 189 StatesRemovedByMinimization, 5 NontrivialMinimizations. Non-live state removal took 0.1s Buchi closure took 0.0s. Biggest automaton had 121 states and ocurred in iteration 5. Nontrivial modules had stage [2, 0, 2, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 10/26 HoareTripleCheckerStatistics: 144 SDtfs, 387 SDslu, 153 SDs, 0 SdLazy, 699 SolverSat, 227 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT1 conc0 concLT1 SILN0 SILU0 SILI2 SILT2 lasso0 LassoPreprocessingBenchmarks: Lassos: inital16 mio100 ax100 hnf100 lsp92 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq180 hnf93 smp79 dnf100 smp100 tf110 neg96 sie109 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 23ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 10 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 4 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 1.2s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...