./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/recursive-simple/fibo_7-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 30f4e4ab Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerTermination.xml -i ../sv-benchmarks/c/recursive-simple/fibo_7-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(F end) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f612eebc128d68e9b4bc81ed92184f640c3b9bd4 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-30f4e4a [2019-11-28 03:44:17,981 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-28 03:44:17,984 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-28 03:44:18,001 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-28 03:44:18,002 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-28 03:44:18,003 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-28 03:44:18,004 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-28 03:44:18,007 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-28 03:44:18,010 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-28 03:44:18,011 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-28 03:44:18,012 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-28 03:44:18,013 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-28 03:44:18,014 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-28 03:44:18,015 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-28 03:44:18,016 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-28 03:44:18,017 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-28 03:44:18,018 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-28 03:44:18,019 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-28 03:44:18,021 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-28 03:44:18,023 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-28 03:44:18,025 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-28 03:44:18,026 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-28 03:44:18,027 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-28 03:44:18,028 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-28 03:44:18,030 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-28 03:44:18,031 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-28 03:44:18,031 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-28 03:44:18,035 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-28 03:44:18,036 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-28 03:44:18,037 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-28 03:44:18,038 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-28 03:44:18,039 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-28 03:44:18,040 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-28 03:44:18,041 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-28 03:44:18,042 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-28 03:44:18,045 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-28 03:44:18,047 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-28 03:44:18,047 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-28 03:44:18,047 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-28 03:44:18,048 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-28 03:44:18,052 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-28 03:44:18,054 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-32bit-Automizer_Default.epf [2019-11-28 03:44:18,084 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-28 03:44:18,084 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-28 03:44:18,087 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-28 03:44:18,087 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-28 03:44:18,087 INFO L138 SettingsManager]: * Use SBE=true [2019-11-28 03:44:18,087 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2019-11-28 03:44:18,088 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2019-11-28 03:44:18,088 INFO L138 SettingsManager]: * Use old map elimination=false [2019-11-28 03:44:18,088 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2019-11-28 03:44:18,089 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2019-11-28 03:44:18,090 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2019-11-28 03:44:18,090 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-28 03:44:18,090 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-28 03:44:18,091 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-28 03:44:18,091 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-28 03:44:18,091 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-28 03:44:18,092 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-28 03:44:18,092 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2019-11-28 03:44:18,092 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2019-11-28 03:44:18,093 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2019-11-28 03:44:18,093 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-28 03:44:18,093 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-28 03:44:18,093 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2019-11-28 03:44:18,094 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-28 03:44:18,094 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2019-11-28 03:44:18,094 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-28 03:44:18,094 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-28 03:44:18,095 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2019-11-28 03:44:18,095 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-28 03:44:18,095 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-28 03:44:18,096 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2019-11-28 03:44:18,098 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2019-11-28 03:44:18,098 INFO L138 SettingsManager]: * TransformationType=MODULO_NEIGHBOR Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f612eebc128d68e9b4bc81ed92184f640c3b9bd4 [2019-11-28 03:44:18,399 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-28 03:44:18,413 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-28 03:44:18,417 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-28 03:44:18,419 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-28 03:44:18,419 INFO L275 PluginConnector]: CDTParser initialized [2019-11-28 03:44:18,420 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/fibo_7-1.c [2019-11-28 03:44:18,480 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f5697f4c/d4fd173ca6944a2ca3aad908d3ba787e/FLAGd91a2d6f6 [2019-11-28 03:44:18,903 INFO L306 CDTParser]: Found 1 translation units. [2019-11-28 03:44:18,906 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_7-1.c [2019-11-28 03:44:18,912 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f5697f4c/d4fd173ca6944a2ca3aad908d3ba787e/FLAGd91a2d6f6 [2019-11-28 03:44:19,282 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f5697f4c/d4fd173ca6944a2ca3aad908d3ba787e [2019-11-28 03:44:19,286 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-28 03:44:19,288 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-28 03:44:19,291 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-28 03:44:19,292 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-28 03:44:19,295 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-28 03:44:19,296 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:44:19" (1/1) ... [2019-11-28 03:44:19,299 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25640e1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:44:19, skipping insertion in model container [2019-11-28 03:44:19,299 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:44:19" (1/1) ... [2019-11-28 03:44:19,307 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-28 03:44:19,324 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-28 03:44:19,498 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 03:44:19,502 INFO L203 MainTranslator]: Completed pre-run [2019-11-28 03:44:19,514 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 03:44:19,525 INFO L208 MainTranslator]: Completed translation [2019-11-28 03:44:19,525 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:44:19 WrapperNode [2019-11-28 03:44:19,525 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-28 03:44:19,526 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-28 03:44:19,526 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-28 03:44:19,526 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-28 03:44:19,535 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:44:19" (1/1) ... [2019-11-28 03:44:19,540 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:44:19" (1/1) ... [2019-11-28 03:44:19,556 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-28 03:44:19,556 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-28 03:44:19,556 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-28 03:44:19,557 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-28 03:44:19,627 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:44:19" (1/1) ... [2019-11-28 03:44:19,627 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:44:19" (1/1) ... [2019-11-28 03:44:19,628 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:44:19" (1/1) ... [2019-11-28 03:44:19,628 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:44:19" (1/1) ... [2019-11-28 03:44:19,632 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:44:19" (1/1) ... [2019-11-28 03:44:19,634 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:44:19" (1/1) ... [2019-11-28 03:44:19,635 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:44:19" (1/1) ... [2019-11-28 03:44:19,636 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-28 03:44:19,637 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-28 03:44:19,637 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-28 03:44:19,637 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-28 03:44:19,638 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:44:19" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:19,687 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-28 03:44:19,688 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-28 03:44:19,688 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2019-11-28 03:44:19,688 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2019-11-28 03:44:19,835 INFO L292 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-28 03:44:19,836 INFO L297 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-28 03:44:19,837 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:44:19 BoogieIcfgContainer [2019-11-28 03:44:19,837 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-28 03:44:19,838 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2019-11-28 03:44:19,838 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2019-11-28 03:44:19,840 INFO L275 PluginConnector]: BuchiAutomizer initialized [2019-11-28 03:44:19,841 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-28 03:44:19,841 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 28.11 03:44:19" (1/3) ... [2019-11-28 03:44:19,842 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@39a5986b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 28.11 03:44:19, skipping insertion in model container [2019-11-28 03:44:19,842 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-28 03:44:19,842 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:44:19" (2/3) ... [2019-11-28 03:44:19,842 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@39a5986b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 28.11 03:44:19, skipping insertion in model container [2019-11-28 03:44:19,843 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-28 03:44:19,843 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:44:19" (3/3) ... [2019-11-28 03:44:19,844 INFO L371 chiAutomizerObserver]: Analyzing ICFG fibo_7-1.c [2019-11-28 03:44:19,891 INFO L356 BuchiCegarLoop]: Interprodecural is true [2019-11-28 03:44:19,892 INFO L357 BuchiCegarLoop]: Hoare is false [2019-11-28 03:44:19,892 INFO L358 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2019-11-28 03:44:19,892 INFO L359 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-28 03:44:19,893 INFO L360 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-28 03:44:19,893 INFO L361 BuchiCegarLoop]: Difference is false [2019-11-28 03:44:19,893 INFO L362 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-28 03:44:19,893 INFO L365 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2019-11-28 03:44:19,907 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 17 states. [2019-11-28 03:44:19,929 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-11-28 03:44:19,929 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 03:44:19,929 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 03:44:19,936 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2019-11-28 03:44:19,937 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2019-11-28 03:44:19,937 INFO L424 BuchiCegarLoop]: ======== Iteration 1============ [2019-11-28 03:44:19,937 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 17 states. [2019-11-28 03:44:19,939 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-11-28 03:44:19,940 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 03:44:19,940 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 03:44:19,940 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2019-11-28 03:44:19,940 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2019-11-28 03:44:19,946 INFO L794 eck$LassoCheckResult]: Stem: 8#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 7; 19#L25true call main_#t~ret2 := fibo(main_~x~0);< 11#fiboENTRYtrue [2019-11-28 03:44:19,947 INFO L796 eck$LassoCheckResult]: Loop: 11#fiboENTRYtrue ~n := #in~n; 7#L6true assume !(~n < 1); 10#L8true assume !(1 == ~n); 18#L11true call #t~ret0 := fibo(~n - 1);< 11#fiboENTRYtrue [2019-11-28 03:44:19,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:44:19,952 INFO L82 PathProgramCache]: Analyzing trace with hash 1021, now seen corresponding path program 1 times [2019-11-28 03:44:19,959 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 03:44:19,959 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517655879] [2019-11-28 03:44:19,959 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 03:44:20,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 03:44:20,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 03:44:20,044 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 03:44:20,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:44:20,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1420172, now seen corresponding path program 1 times [2019-11-28 03:44:20,045 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 03:44:20,046 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620578144] [2019-11-28 03:44:20,046 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 03:44:20,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 03:44:20,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 03:44:20,059 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 03:44:20,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:44:20,064 INFO L82 PathProgramCache]: Analyzing trace with hash 943411592, now seen corresponding path program 1 times [2019-11-28 03:44:20,065 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 03:44:20,065 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943715837] [2019-11-28 03:44:20,065 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 03:44:20,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 03:44:20,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 03:44:20,080 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 03:44:20,241 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 03:44:20,242 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 03:44:20,242 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 03:44:20,242 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 03:44:20,242 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-28 03:44:20,242 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:20,243 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 03:44:20,243 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 03:44:20,243 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-1.c_Iteration1_Loop [2019-11-28 03:44:20,243 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 03:44:20,243 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 03:44:20,268 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:44:20,276 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:44:20,286 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:44:20,290 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:44:20,293 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:44:20,392 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 03:44:20,393 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 03:44:20,402 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 03:44:20,402 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:20,417 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 03:44:20,418 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) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:20,425 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 03:44:20,426 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 03:44:20,436 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 03:44:20,436 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:20,447 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 03:44:20,448 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 03:44:20,451 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 03:44:20,451 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret0=0} Honda state: {fibo_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 03:44:20,473 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 03:44:20,473 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:20,478 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 03:44:20,478 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 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:20,493 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 03:44:20,494 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:20,508 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-28 03:44:20,508 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 03:44:20,534 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-28 03:44:20,537 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 03:44:20,538 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 03:44:20,538 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 03:44:20,538 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 03:44:20,538 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-28 03:44:20,538 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:20,540 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 03:44:20,540 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 03:44:20,540 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-1.c_Iteration1_Loop [2019-11-28 03:44:20,540 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 03:44:20,541 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 03:44:20,544 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:44:20,550 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:44:20,555 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:44:20,561 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:44:20,565 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:44:20,642 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 03:44:20,647 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 03:44:20,653 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 03:44:20,655 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 03:44:20,655 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 03:44:20,657 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 03:44:20,657 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 03:44:20,657 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 03:44:20,660 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 03:44:20,660 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 03:44:20,664 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:20,669 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 03:44:20,672 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 03:44:20,672 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 03:44:20,673 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 03:44:20,673 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 03:44:20,673 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 03:44:20,674 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 03:44:20,674 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 03:44:20,678 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:20,689 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 03:44:20,691 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 03:44:20,692 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 03:44:20,692 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 03:44:20,692 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 03:44:20,692 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 03:44:20,693 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 03:44:20,693 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 03:44:20,695 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. [MP z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Exception during sending of exit command (exit): Broken pipe No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:20,703 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 03:44:20,705 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 03:44:20,705 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 03:44:20,705 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 03:44:20,705 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 03:44:20,705 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 03:44:20,706 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 03:44:20,707 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 03:44:20,710 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 03:44:20,724 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:20,727 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 03:44:20,727 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 03:44:20,727 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 03:44:20,727 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 03:44:20,727 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 03:44:20,730 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 03:44:20,730 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 03:44:20,743 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-28 03:44:20,761 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-28 03:44:20,762 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:20,770 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-28 03:44:20,770 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-28 03:44:20,770 INFO L510 LassoAnalysis]: Proved termination. [2019-11-28 03:44:20,771 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_#in~n) = 1*fibo_#in~n Supporting invariants [] [MP z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Exception during sending of exit command (exit): Broken pipe [2019-11-28 03:44:20,776 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-28 03:44:20,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:44:20,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:20,835 INFO L255 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-28 03:44:20,839 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:20,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:20,866 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 03:44:20,867 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:20,906 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 03:44:20,920 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2019-11-28 03:44:20,921 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 17 states. Second operand 4 states. [2019-11-28 03:44:21,069 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 17 states.. Second operand 4 states. Result 47 states and 59 transitions. Complement of second has 12 states. [2019-11-28 03:44:21,071 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2019-11-28 03:44:21,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2019-11-28 03:44:21,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 10 transitions. [2019-11-28 03:44:21,077 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 2 letters. Loop has 4 letters. [2019-11-28 03:44:21,080 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:44:21,080 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 6 letters. Loop has 4 letters. [2019-11-28 03:44:21,080 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:44:21,081 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 2 letters. Loop has 8 letters. [2019-11-28 03:44:21,081 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:44:21,082 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 47 states and 59 transitions. [2019-11-28 03:44:21,098 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-11-28 03:44:21,108 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 47 states to 24 states and 33 transitions. [2019-11-28 03:44:21,109 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 16 [2019-11-28 03:44:21,110 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 17 [2019-11-28 03:44:21,111 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 33 transitions. [2019-11-28 03:44:21,115 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 03:44:21,116 INFO L688 BuchiCegarLoop]: Abstraction has 24 states and 33 transitions. [2019-11-28 03:44:21,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states and 33 transitions. [2019-11-28 03:44:21,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 19. [2019-11-28 03:44:21,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-11-28 03:44:21,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2019-11-28 03:44:21,157 INFO L711 BuchiCegarLoop]: Abstraction has 19 states and 25 transitions. [2019-11-28 03:44:21,157 INFO L591 BuchiCegarLoop]: Abstraction has 19 states and 25 transitions. [2019-11-28 03:44:21,157 INFO L424 BuchiCegarLoop]: ======== Iteration 2============ [2019-11-28 03:44:21,157 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 19 states and 25 transitions. [2019-11-28 03:44:21,162 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-11-28 03:44:21,163 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 03:44:21,163 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 03:44:21,165 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 03:44:21,165 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 03:44:21,166 INFO L794 eck$LassoCheckResult]: Stem: 120#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 7; 121#L25 call main_#t~ret2 := fibo(main_~x~0);< 125#fiboENTRY ~n := #in~n; 126#L6 assume !(~n < 1); 124#L8 assume !(1 == ~n); 118#L11 call #t~ret0 := fibo(~n - 1);< 127#fiboENTRY ~n := #in~n; 128#L6 assume ~n < 1;#res := 0; 123#fiboFINAL assume true; 117#fiboEXIT >#32#return; 119#L11-1 [2019-11-28 03:44:21,166 INFO L796 eck$LassoCheckResult]: Loop: 119#L11-1 call #t~ret1 := fibo(~n - 2);< 132#fiboENTRY ~n := #in~n; 135#L6 assume !(~n < 1); 134#L8 assume !(1 == ~n); 130#L11 call #t~ret0 := fibo(~n - 1);< 132#fiboENTRY ~n := #in~n; 135#L6 assume ~n < 1;#res := 0; 131#fiboFINAL assume true; 133#fiboEXIT >#32#return; 119#L11-1 [2019-11-28 03:44:21,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:44:21,167 INFO L82 PathProgramCache]: Analyzing trace with hash 531553871, now seen corresponding path program 1 times [2019-11-28 03:44:21,167 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 03:44:21,168 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714482701] [2019-11-28 03:44:21,168 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 03:44:21,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:21,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:21,302 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 03:44:21,304 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714482701] [2019-11-28 03:44:21,305 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246771368] [2019-11-28 03:44:21,306 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 03:44:21,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:21,332 INFO L255 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-28 03:44:21,334 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:21,357 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 03:44:21,359 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 03:44:21,359 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-11-28 03:44:21,361 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327496201] [2019-11-28 03:44:21,366 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-11-28 03:44:21,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:44:21,367 INFO L82 PathProgramCache]: Analyzing trace with hash -606345326, now seen corresponding path program 1 times [2019-11-28 03:44:21,367 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 03:44:21,368 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85086252] [2019-11-28 03:44:21,368 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 03:44:21,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:21,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:21,443 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-28 03:44:21,444 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85086252] [2019-11-28 03:44:21,444 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 03:44:21,444 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-28 03:44:21,445 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291280543] [2019-11-28 03:44:21,445 INFO L811 eck$LassoCheckResult]: loop already infeasible [2019-11-28 03:44:21,446 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 03:44:21,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-28 03:44:21,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-11-28 03:44:21,450 INFO L87 Difference]: Start difference. First operand 19 states and 25 transitions. cyclomatic complexity: 8 Second operand 6 states. [2019-11-28 03:44:21,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 03:44:21,538 INFO L93 Difference]: Finished difference Result 25 states and 31 transitions. [2019-11-28 03:44:21,539 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-28 03:44:21,540 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 25 states and 31 transitions. [2019-11-28 03:44:21,542 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-11-28 03:44:21,543 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 25 states to 23 states and 29 transitions. [2019-11-28 03:44:21,543 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 19 [2019-11-28 03:44:21,544 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 19 [2019-11-28 03:44:21,544 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 29 transitions. [2019-11-28 03:44:21,544 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 03:44:21,544 INFO L688 BuchiCegarLoop]: Abstraction has 23 states and 29 transitions. [2019-11-28 03:44:21,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states and 29 transitions. [2019-11-28 03:44:21,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-11-28 03:44:21,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-28 03:44:21,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2019-11-28 03:44:21,549 INFO L711 BuchiCegarLoop]: Abstraction has 23 states and 29 transitions. [2019-11-28 03:44:21,549 INFO L591 BuchiCegarLoop]: Abstraction has 23 states and 29 transitions. [2019-11-28 03:44:21,549 INFO L424 BuchiCegarLoop]: ======== Iteration 3============ [2019-11-28 03:44:21,549 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 23 states and 29 transitions. [2019-11-28 03:44:21,550 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-11-28 03:44:21,551 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 03:44:21,551 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 03:44:21,551 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 03:44:21,552 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1] [2019-11-28 03:44:21,552 INFO L794 eck$LassoCheckResult]: Stem: 220#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 7; 221#L25 call main_#t~ret2 := fibo(main_~x~0);< 225#fiboENTRY ~n := #in~n; 226#L6 assume !(~n < 1); 224#L8 assume !(1 == ~n); 218#L11 call #t~ret0 := fibo(~n - 1);< 227#fiboENTRY ~n := #in~n; 228#L6 assume !(~n < 1); 222#L8 assume 1 == ~n;#res := 1; 223#fiboFINAL assume true; 217#fiboEXIT >#32#return; 219#L11-1 [2019-11-28 03:44:21,552 INFO L796 eck$LassoCheckResult]: Loop: 219#L11-1 call #t~ret1 := fibo(~n - 2);< 232#fiboENTRY ~n := #in~n; 239#L6 assume !(~n < 1); 238#L8 assume !(1 == ~n); 230#L11 call #t~ret0 := fibo(~n - 1);< 232#fiboENTRY ~n := #in~n; 239#L6 assume !(~n < 1); 238#L8 assume 1 == ~n;#res := 1; 236#fiboFINAL assume true; 234#fiboEXIT >#32#return; 219#L11-1 [2019-11-28 03:44:21,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:44:21,553 INFO L82 PathProgramCache]: Analyzing trace with hash -701674289, now seen corresponding path program 1 times [2019-11-28 03:44:21,553 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 03:44:21,553 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563393951] [2019-11-28 03:44:21,553 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 03:44:21,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:21,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:21,617 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 03:44:21,618 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563393951] [2019-11-28 03:44:21,618 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852162623] [2019-11-28 03:44:21,618 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) [2019-11-28 03:44:21,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:21,643 INFO L255 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-28 03:44:21,644 INFO L278 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 03:44:21,661 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 03:44:21,662 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 03:44:21,662 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-11-28 03:44:21,663 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776974731] [2019-11-28 03:44:21,663 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-11-28 03:44:21,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:44:21,664 INFO L82 PathProgramCache]: Analyzing trace with hash -1616811028, now seen corresponding path program 1 times [2019-11-28 03:44:21,664 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 03:44:21,664 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575652963] [2019-11-28 03:44:21,665 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 03:44:21,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 03:44:21,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 03:44:21,677 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 03:44:21,809 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 03:44:21,809 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 03:44:21,809 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 03:44:21,809 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 03:44:21,809 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-28 03:44:21,810 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:21,810 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 03:44:21,810 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 03:44:21,810 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-1.c_Iteration3_Loop [2019-11-28 03:44:21,810 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 03:44:21,810 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 03:44:21,812 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:44:21,826 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:44:21,830 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:44:21,832 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:44:21,884 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 03:44:21,885 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 03:44:21,901 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 03:44:21,901 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 03:44:21,923 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-28 03:44:21,923 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:22,352 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-28 03:44:22,354 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 03:44:22,354 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 03:44:22,354 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 03:44:22,355 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 03:44:22,355 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-28 03:44:22,355 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:22,355 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 03:44:22,355 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 03:44:22,355 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-1.c_Iteration3_Loop [2019-11-28 03:44:22,356 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 03:44:22,356 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 03:44:22,357 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:44:22,363 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:44:22,373 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:44:22,375 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:44:22,415 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 03:44:22,415 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 03:44:22,427 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 03:44:22,429 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 03:44:22,429 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 03:44:22,429 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 03:44:22,429 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 03:44:22,430 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 03:44:22,431 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 03:44:22,431 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 03:44:22,434 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:22,447 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 03:44:22,449 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 03:44:22,449 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 03:44:22,449 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 03:44:22,450 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 03:44:22,450 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 03:44:22,452 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 03:44:22,452 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 03:44:22,456 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-28 03:44:22,461 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-28 03:44:22,461 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) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:22,472 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-28 03:44:22,473 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-28 03:44:22,473 INFO L510 LassoAnalysis]: Proved termination. [2019-11-28 03:44:22,473 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2019-11-28 03:44:22,476 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-28 03:44:22,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:44:22,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:22,515 INFO L255 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-28 03:44:22,516 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:22,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:22,556 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-28 03:44:22,558 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:22,612 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 03:44:22,613 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 5 loop predicates [2019-11-28 03:44:22,613 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 23 states and 29 transitions. cyclomatic complexity: 8 Second operand 7 states. [2019-11-28 03:44:22,825 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 03:44:22,828 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2019-11-28 03:44:22,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2019-11-28 03:44:22,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 34 transitions. [2019-11-28 03:44:22,830 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 34 transitions. Stem has 11 letters. Loop has 10 letters. [2019-11-28 03:44:22,831 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:44:22,831 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 34 transitions. Stem has 21 letters. Loop has 10 letters. [2019-11-28 03:44:22,832 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:44:22,834 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 34 transitions. Stem has 11 letters. Loop has 20 letters. [2019-11-28 03:44:22,835 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:44:22,835 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 134 states and 182 transitions. [2019-11-28 03:44:22,851 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2019-11-28 03:44:22,858 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 134 states to 107 states and 151 transitions. [2019-11-28 03:44:22,859 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 63 [2019-11-28 03:44:22,859 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 68 [2019-11-28 03:44:22,860 INFO L73 IsDeterministic]: Start isDeterministic. Operand 107 states and 151 transitions. [2019-11-28 03:44:22,860 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 03:44:22,860 INFO L688 BuchiCegarLoop]: Abstraction has 107 states and 151 transitions. [2019-11-28 03:44:22,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states and 151 transitions. [2019-11-28 03:44:22,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 93. [2019-11-28 03:44:22,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-11-28 03:44:22,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 125 transitions. [2019-11-28 03:44:22,878 INFO L711 BuchiCegarLoop]: Abstraction has 93 states and 125 transitions. [2019-11-28 03:44:22,879 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 03:44:22,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-28 03:44:22,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2019-11-28 03:44:22,879 INFO L87 Difference]: Start difference. First operand 93 states and 125 transitions. Second operand 8 states. [MP z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Exception during sending of exit command (exit): Broken pipe [2019-11-28 03:44:23,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 03:44:23,025 INFO L93 Difference]: Finished difference Result 108 states and 146 transitions. [2019-11-28 03:44:23,025 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-28 03:44:23,026 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 108 states and 146 transitions. [2019-11-28 03:44:23,034 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2019-11-28 03:44:23,042 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 108 states to 105 states and 143 transitions. [2019-11-28 03:44:23,042 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 68 [2019-11-28 03:44:23,043 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 68 [2019-11-28 03:44:23,043 INFO L73 IsDeterministic]: Start isDeterministic. Operand 105 states and 143 transitions. [2019-11-28 03:44:23,043 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 03:44:23,043 INFO L688 BuchiCegarLoop]: Abstraction has 105 states and 143 transitions. [2019-11-28 03:44:23,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states and 143 transitions. [2019-11-28 03:44:23,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 93. [2019-11-28 03:44:23,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-11-28 03:44:23,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 124 transitions. [2019-11-28 03:44:23,066 INFO L711 BuchiCegarLoop]: Abstraction has 93 states and 124 transitions. [2019-11-28 03:44:23,066 INFO L591 BuchiCegarLoop]: Abstraction has 93 states and 124 transitions. [2019-11-28 03:44:23,066 INFO L424 BuchiCegarLoop]: ======== Iteration 4============ [2019-11-28 03:44:23,067 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 93 states and 124 transitions. [2019-11-28 03:44:23,072 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2019-11-28 03:44:23,073 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 03:44:23,073 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 03:44:23,076 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [5, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 03:44:23,076 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [6, 5, 5, 3, 3, 3, 3, 2, 2, 2, 1] [2019-11-28 03:44:23,076 INFO L794 eck$LassoCheckResult]: Stem: 744#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 7; 745#L25 call main_#t~ret2 := fibo(main_~x~0);< 769#fiboENTRY ~n := #in~n; 793#L6 assume !(~n < 1); 752#L8 assume !(1 == ~n); 753#L11 call #t~ret0 := fibo(~n - 1);< 759#fiboENTRY ~n := #in~n; 761#L6 assume !(~n < 1); 772#L8 assume !(1 == ~n); 760#L11 call #t~ret0 := fibo(~n - 1);< 759#fiboENTRY ~n := #in~n; 761#L6 assume !(~n < 1); 772#L8 assume !(1 == ~n); 760#L11 call #t~ret0 := fibo(~n - 1);< 759#fiboENTRY ~n := #in~n; 762#L6 assume !(~n < 1); 796#L8 assume 1 == ~n;#res := 1; 795#fiboFINAL assume true; 794#fiboEXIT >#32#return; 757#L11-1 call #t~ret1 := fibo(~n - 2);< 756#fiboENTRY ~n := #in~n; 758#L6 assume ~n < 1;#res := 0; 823#fiboFINAL assume true; 817#fiboEXIT >#34#return; 814#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret0;havoc #t~ret1; 812#fiboFINAL assume true; 802#fiboEXIT >#32#return; 804#L11-1 [2019-11-28 03:44:23,077 INFO L796 eck$LassoCheckResult]: Loop: 804#L11-1 call #t~ret1 := fibo(~n - 2);< 810#fiboENTRY ~n := #in~n; 818#L6 assume !(~n < 1); 815#L8 assume !(1 == ~n); 808#L11 call #t~ret0 := fibo(~n - 1);< 810#fiboENTRY ~n := #in~n; 818#L6 assume !(~n < 1); 815#L8 assume !(1 == ~n); 808#L11 call #t~ret0 := fibo(~n - 1);< 810#fiboENTRY ~n := #in~n; 818#L6 assume !(~n < 1); 815#L8 assume 1 == ~n;#res := 1; 816#fiboFINAL assume true; 813#fiboEXIT >#32#return; 804#L11-1 call #t~ret1 := fibo(~n - 2);< 810#fiboENTRY ~n := #in~n; 818#L6 assume !(~n < 1); 815#L8 assume !(1 == ~n); 808#L11 call #t~ret0 := fibo(~n - 1);< 810#fiboENTRY ~n := #in~n; 818#L6 assume !(~n < 1); 815#L8 assume 1 == ~n;#res := 1; 816#fiboFINAL assume true; 813#fiboEXIT >#32#return; 804#L11-1 call #t~ret1 := fibo(~n - 2);< 810#fiboENTRY ~n := #in~n; 818#L6 assume ~n < 1;#res := 0; 819#fiboFINAL assume true; 821#fiboEXIT >#34#return; 809#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret0;havoc #t~ret1; 811#fiboFINAL assume true; 807#fiboEXIT >#34#return; 809#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret0;havoc #t~ret1; 811#fiboFINAL assume true; 807#fiboEXIT >#32#return; 804#L11-1 [2019-11-28 03:44:23,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:44:23,077 INFO L82 PathProgramCache]: Analyzing trace with hash -240562386, now seen corresponding path program 1 times [2019-11-28 03:44:23,077 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 03:44:23,077 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821311410] [2019-11-28 03:44:23,078 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 03:44:23,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:23,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:23,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:23,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:23,245 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-28 03:44:23,246 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821311410] [2019-11-28 03:44:23,246 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687185462] [2019-11-28 03:44:23,246 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 03:44:23,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:23,275 INFO L255 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-28 03:44:23,277 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:23,313 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-28 03:44:23,314 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 03:44:23,314 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2019-11-28 03:44:23,314 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775237809] [2019-11-28 03:44:23,315 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-11-28 03:44:23,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:44:23,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1408722332, now seen corresponding path program 1 times [2019-11-28 03:44:23,318 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 03:44:23,318 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751634744] [2019-11-28 03:44:23,318 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 03:44:23,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:23,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:23,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:23,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:23,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:23,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:23,454 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 26 proven. 13 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-11-28 03:44:23,455 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751634744] [2019-11-28 03:44:23,455 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682139422] [2019-11-28 03:44:23,455 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 03:44:23,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:23,491 INFO L255 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-28 03:44:23,494 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:23,533 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 25 proven. 15 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-11-28 03:44:23,534 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 03:44:23,534 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2019-11-28 03:44:23,534 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891120266] [2019-11-28 03:44:23,536 INFO L811 eck$LassoCheckResult]: loop already infeasible [2019-11-28 03:44:23,536 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 03:44:23,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-28 03:44:23,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2019-11-28 03:44:23,537 INFO L87 Difference]: Start difference. First operand 93 states and 124 transitions. cyclomatic complexity: 36 Second operand 12 states. [2019-11-28 03:44:23,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 03:44:23,771 INFO L93 Difference]: Finished difference Result 115 states and 157 transitions. [2019-11-28 03:44:23,772 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-28 03:44:23,772 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 115 states and 157 transitions. [2019-11-28 03:44:23,780 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 15 [2019-11-28 03:44:23,784 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 115 states to 113 states and 155 transitions. [2019-11-28 03:44:23,784 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 76 [2019-11-28 03:44:23,785 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 76 [2019-11-28 03:44:23,785 INFO L73 IsDeterministic]: Start isDeterministic. Operand 113 states and 155 transitions. [2019-11-28 03:44:23,785 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 03:44:23,785 INFO L688 BuchiCegarLoop]: Abstraction has 113 states and 155 transitions. [2019-11-28 03:44:23,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states and 155 transitions. [2019-11-28 03:44:23,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2019-11-28 03:44:23,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2019-11-28 03:44:23,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 155 transitions. [2019-11-28 03:44:23,797 INFO L711 BuchiCegarLoop]: Abstraction has 113 states and 155 transitions. [2019-11-28 03:44:23,797 INFO L591 BuchiCegarLoop]: Abstraction has 113 states and 155 transitions. [2019-11-28 03:44:23,797 INFO L424 BuchiCegarLoop]: ======== Iteration 5============ [2019-11-28 03:44:23,798 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 113 states and 155 transitions. [2019-11-28 03:44:23,801 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 15 [2019-11-28 03:44:23,801 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 03:44:23,801 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 03:44:23,803 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [6, 5, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 03:44:23,803 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2019-11-28 03:44:23,803 INFO L794 eck$LassoCheckResult]: Stem: 1248#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 7; 1249#L25 call main_#t~ret2 := fibo(main_~x~0);< 1278#fiboENTRY ~n := #in~n; 1308#L6 assume !(~n < 1); 1307#L8 assume !(1 == ~n); 1256#L11 call #t~ret0 := fibo(~n - 1);< 1273#fiboENTRY ~n := #in~n; 1274#L6 assume !(~n < 1); 1255#L8 assume !(1 == ~n); 1257#L11 call #t~ret0 := fibo(~n - 1);< 1301#fiboENTRY ~n := #in~n; 1305#L6 assume !(~n < 1); 1303#L8 assume !(1 == ~n); 1263#L11 call #t~ret0 := fibo(~n - 1);< 1301#fiboENTRY ~n := #in~n; 1305#L6 assume !(~n < 1); 1303#L8 assume !(1 == ~n); 1263#L11 call #t~ret0 := fibo(~n - 1);< 1301#fiboENTRY ~n := #in~n; 1306#L6 assume !(~n < 1); 1304#L8 assume 1 == ~n;#res := 1; 1302#fiboFINAL assume true; 1300#fiboEXIT >#32#return; 1243#L11-1 call #t~ret1 := fibo(~n - 2);< 1298#fiboENTRY ~n := #in~n; 1345#L6 assume ~n < 1;#res := 0; 1344#fiboFINAL assume true; 1342#fiboEXIT >#34#return; 1340#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret0;havoc #t~ret1; 1339#fiboFINAL assume true; 1332#fiboEXIT >#32#return; 1260#L11-1 [2019-11-28 03:44:23,804 INFO L796 eck$LassoCheckResult]: Loop: 1260#L11-1 call #t~ret1 := fibo(~n - 2);< 1276#fiboENTRY ~n := #in~n; 1309#L6 assume !(~n < 1); 1311#L8 assume !(1 == ~n); 1262#L11 call #t~ret0 := fibo(~n - 1);< 1276#fiboENTRY ~n := #in~n; 1309#L6 assume !(~n < 1); 1311#L8 assume !(1 == ~n); 1262#L11 call #t~ret0 := fibo(~n - 1);< 1276#fiboENTRY ~n := #in~n; 1309#L6 assume !(~n < 1); 1311#L8 assume 1 == ~n;#res := 1; 1254#fiboFINAL assume true; 1346#fiboEXIT >#32#return; 1252#L11-1 call #t~ret1 := fibo(~n - 2);< 1271#fiboENTRY ~n := #in~n; 1272#L6 assume ~n < 1;#res := 0; 1310#fiboFINAL assume true; 1347#fiboEXIT >#34#return; 1244#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret0;havoc #t~ret1; 1258#fiboFINAL assume true; 1264#fiboEXIT >#32#return; 1260#L11-1 [2019-11-28 03:44:23,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:44:23,804 INFO L82 PathProgramCache]: Analyzing trace with hash 1087292419, now seen corresponding path program 2 times [2019-11-28 03:44:23,804 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 03:44:23,804 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608790167] [2019-11-28 03:44:23,804 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 03:44:23,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:23,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:23,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:23,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:23,947 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 45 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-28 03:44:23,948 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608790167] [2019-11-28 03:44:23,948 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879405430] [2019-11-28 03:44:23,948 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 03:44:23,973 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-28 03:44:23,974 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 03:44:23,975 INFO L255 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-28 03:44:23,977 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:24,004 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 45 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-28 03:44:24,004 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 03:44:24,004 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-11-28 03:44:24,005 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958255314] [2019-11-28 03:44:24,006 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-11-28 03:44:24,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:44:24,006 INFO L82 PathProgramCache]: Analyzing trace with hash 22774646, now seen corresponding path program 2 times [2019-11-28 03:44:24,007 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 03:44:24,007 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830886894] [2019-11-28 03:44:24,007 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 03:44:24,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 03:44:24,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 03:44:24,039 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 03:44:24,277 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 03:44:24,277 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 03:44:24,277 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 03:44:24,277 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 03:44:24,277 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-28 03:44:24,277 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:24,277 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 03:44:24,277 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 03:44:24,278 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-1.c_Iteration5_Loop [2019-11-28 03:44:24,278 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 03:44:24,278 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 03:44:24,279 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:44:24,280 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:44:24,282 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:44:24,285 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 03:44:24,376 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 03:44:24,376 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:24,381 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 03:44:24,381 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 03:44:24,384 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 03:44:24,384 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret1=0} Honda state: {fibo_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:24,389 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 03:44:24,390 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 03:44:24,392 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 03:44:24,392 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:24,403 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 03:44:24,403 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 03:44:24,406 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 03:44:24,406 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret0=1} Honda state: {fibo_#t~ret0=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:24,413 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 03:44:24,413 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 03:44:24,425 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-28 03:44:24,425 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 03:44:24,930 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-28 03:44:24,932 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 03:44:24,932 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 03:44:24,932 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 03:44:24,933 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 03:44:24,933 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-28 03:44:24,933 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:24,933 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 03:44:24,933 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 03:44:24,933 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-1.c_Iteration5_Loop [2019-11-28 03:44:24,933 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 03:44:24,933 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 03:44:24,934 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:44:24,938 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:44:24,939 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:44:24,953 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:44:25,030 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 03:44:25,030 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:25,039 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 03:44:25,041 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 03:44:25,041 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 03:44:25,041 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 03:44:25,041 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 03:44:25,041 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 03:44:25,042 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 03:44:25,042 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 03:44:25,044 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:25,053 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 03:44:25,055 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 03:44:25,055 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 03:44:25,055 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 03:44:25,055 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 03:44:25,055 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 03:44:25,056 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 03:44:25,056 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 03:44:25,057 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:25,063 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 03:44:25,064 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 03:44:25,064 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 03:44:25,064 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 03:44:25,065 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 03:44:25,065 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 03:44:25,066 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 03:44:25,066 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 03:44:25,071 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-28 03:44:25,076 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2019-11-28 03:44:25,076 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 03:44:25,082 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-28 03:44:25,082 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-28 03:44:25,082 INFO L510 LassoAnalysis]: Proved termination. [2019-11-28 03:44:25,083 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2019-11-28 03:44:25,085 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 03:44:25,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:44:25,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:25,129 INFO L255 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-28 03:44:25,132 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:25,154 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 03:44:25,160 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 03:44:25,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:25,187 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-28 03:44:25,189 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:25,255 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-28 03:44:25,255 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 6 loop predicates [2019-11-28 03:44:25,256 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 113 states and 155 transitions. cyclomatic complexity: 48 Second operand 8 states. [2019-11-28 03:44:25,455 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 113 states and 155 transitions. cyclomatic complexity: 48. Second operand 8 states. Result 182 states and 247 transitions. Complement of second has 33 states. [2019-11-28 03:44:25,456 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 9 states 2 stem states 6 non-accepting loop states 1 accepting loop states [2019-11-28 03:44:25,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-11-28 03:44:25,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 36 transitions. [2019-11-28 03:44:25,457 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 36 transitions. Stem has 31 letters. Loop has 22 letters. [2019-11-28 03:44:25,457 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:44:25,457 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-28 03:44:25,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:44:25,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:25,502 INFO L255 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-28 03:44:25,504 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:25,530 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 03:44:25,533 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 03:44:25,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:25,558 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-28 03:44:25,560 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:25,631 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-28 03:44:25,632 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 6 loop predicates [2019-11-28 03:44:25,632 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 113 states and 155 transitions. cyclomatic complexity: 48 Second operand 8 states. [2019-11-28 03:44:25,832 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 113 states and 155 transitions. cyclomatic complexity: 48. Second operand 8 states. Result 307 states and 416 transitions. Complement of second has 25 states. [2019-11-28 03:44:25,833 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2019-11-28 03:44:25,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-11-28 03:44:25,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 23 transitions. [2019-11-28 03:44:25,835 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 23 transitions. Stem has 31 letters. Loop has 22 letters. [2019-11-28 03:44:25,836 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:44:25,836 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-28 03:44:25,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:44:25,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:25,891 INFO L255 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-28 03:44:25,894 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:25,928 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 03:44:25,931 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 03:44:25,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:25,961 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-28 03:44:25,963 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:26,032 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-28 03:44:26,033 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 6 loop predicates [2019-11-28 03:44:26,033 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 113 states and 155 transitions. cyclomatic complexity: 48 Second operand 8 states. [2019-11-28 03:44:26,311 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 113 states and 155 transitions. cyclomatic complexity: 48. Second operand 8 states. Result 1077 states and 1512 transitions. Complement of second has 130 states. [2019-11-28 03:44:26,311 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 9 states 2 stem states 6 non-accepting loop states 1 accepting loop states [2019-11-28 03:44:26,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-11-28 03:44:26,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 41 transitions. [2019-11-28 03:44:26,312 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 41 transitions. Stem has 31 letters. Loop has 22 letters. [2019-11-28 03:44:26,317 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:44:26,317 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 41 transitions. Stem has 53 letters. Loop has 22 letters. [2019-11-28 03:44:26,319 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:44:26,319 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 41 transitions. Stem has 31 letters. Loop has 44 letters. [2019-11-28 03:44:26,322 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:44:26,323 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1077 states and 1512 transitions. [2019-11-28 03:44:26,344 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 58 [2019-11-28 03:44:26,367 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1077 states to 604 states and 935 transitions. [2019-11-28 03:44:26,367 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 242 [2019-11-28 03:44:26,369 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 271 [2019-11-28 03:44:26,369 INFO L73 IsDeterministic]: Start isDeterministic. Operand 604 states and 935 transitions. [2019-11-28 03:44:26,373 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 03:44:26,374 INFO L688 BuchiCegarLoop]: Abstraction has 604 states and 935 transitions. [2019-11-28 03:44:26,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states and 935 transitions. [2019-11-28 03:44:26,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 477. [2019-11-28 03:44:26,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 477 states. [2019-11-28 03:44:26,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 725 transitions. [2019-11-28 03:44:26,426 INFO L711 BuchiCegarLoop]: Abstraction has 477 states and 725 transitions. [2019-11-28 03:44:26,426 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 03:44:26,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-28 03:44:26,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2019-11-28 03:44:26,427 INFO L87 Difference]: Start difference. First operand 477 states and 725 transitions. Second operand 14 states. [2019-11-28 03:44:26,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 03:44:26,709 INFO L93 Difference]: Finished difference Result 537 states and 809 transitions. [2019-11-28 03:44:26,709 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-28 03:44:26,710 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 537 states and 809 transitions. [2019-11-28 03:44:26,720 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2019-11-28 03:44:26,732 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 537 states to 534 states and 802 transitions. [2019-11-28 03:44:26,732 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 239 [2019-11-28 03:44:26,733 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 239 [2019-11-28 03:44:26,733 INFO L73 IsDeterministic]: Start isDeterministic. Operand 534 states and 802 transitions. [2019-11-28 03:44:26,734 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 03:44:26,734 INFO L688 BuchiCegarLoop]: Abstraction has 534 states and 802 transitions. [2019-11-28 03:44:26,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states and 802 transitions. [2019-11-28 03:44:26,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 494. [2019-11-28 03:44:26,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 494 states. [2019-11-28 03:44:26,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 746 transitions. [2019-11-28 03:44:26,761 INFO L711 BuchiCegarLoop]: Abstraction has 494 states and 746 transitions. [2019-11-28 03:44:26,761 INFO L591 BuchiCegarLoop]: Abstraction has 494 states and 746 transitions. [2019-11-28 03:44:26,761 INFO L424 BuchiCegarLoop]: ======== Iteration 6============ [2019-11-28 03:44:26,761 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 494 states and 746 transitions. [2019-11-28 03:44:26,766 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2019-11-28 03:44:26,766 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 03:44:26,766 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 03:44:26,767 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1] [2019-11-28 03:44:26,768 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2019-11-28 03:44:26,768 INFO L794 eck$LassoCheckResult]: Stem: 4807#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 7; 4808#L25 call main_#t~ret2 := fibo(main_~x~0);< 4845#fiboENTRY ~n := #in~n; 4869#L6 assume !(~n < 1); 4868#L8 assume !(1 == ~n); 4864#L11 call #t~ret0 := fibo(~n - 1);< 4867#fiboENTRY ~n := #in~n; 4866#L6 assume !(~n < 1); 4865#L8 assume !(1 == ~n); 4860#L11 call #t~ret0 := fibo(~n - 1);< 4862#fiboENTRY ~n := #in~n; 4863#L6 assume !(~n < 1); 4859#L8 assume !(1 == ~n); 4811#L11 call #t~ret0 := fibo(~n - 1);< 4856#fiboENTRY ~n := #in~n; 4857#L6 assume !(~n < 1); 4861#L8 assume !(1 == ~n); 4810#L11 call #t~ret0 := fibo(~n - 1);< 4856#fiboENTRY ~n := #in~n; 4858#L6 assume !(~n < 1); 4809#L8 assume 1 == ~n;#res := 1; 4812#fiboFINAL assume true; 4953#fiboEXIT >#32#return; 4933#L11-1 call #t~ret1 := fibo(~n - 2);< 4941#fiboENTRY ~n := #in~n; 5030#L6 assume !(~n < 1); 4957#L8 assume !(1 == ~n); 4958#L11 call #t~ret0 := fibo(~n - 1);< 4967#fiboENTRY ~n := #in~n; 5112#L6 assume !(~n < 1); 5035#L8 assume !(1 == ~n); 5036#L11 call #t~ret0 := fibo(~n - 1);< 5054#fiboENTRY [2019-11-28 03:44:26,768 INFO L796 eck$LassoCheckResult]: Loop: 5054#fiboENTRY ~n := #in~n; 5065#L6 assume !(~n < 1); 5062#L8 assume !(1 == ~n); 5051#L11 call #t~ret0 := fibo(~n - 1);< 5054#fiboENTRY [2019-11-28 03:44:26,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:44:26,768 INFO L82 PathProgramCache]: Analyzing trace with hash 116207529, now seen corresponding path program 1 times [2019-11-28 03:44:26,769 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 03:44:26,769 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218388443] [2019-11-28 03:44:26,769 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 03:44:26,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:26,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:27,041 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 8 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 03:44:27,042 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218388443] [2019-11-28 03:44:27,042 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129008395] [2019-11-28 03:44:27,042 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 03:44:27,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:27,083 INFO L255 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-28 03:44:27,085 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:27,112 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 38 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-28 03:44:27,115 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 03:44:27,115 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 13] total 20 [2019-11-28 03:44:27,115 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810042595] [2019-11-28 03:44:27,116 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-11-28 03:44:27,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:44:27,117 INFO L82 PathProgramCache]: Analyzing trace with hash 1420172, now seen corresponding path program 2 times [2019-11-28 03:44:27,120 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 03:44:27,120 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828816294] [2019-11-28 03:44:27,120 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 03:44:27,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 03:44:27,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 03:44:27,131 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 03:44:27,174 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 03:44:27,174 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 03:44:27,174 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 03:44:27,174 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 03:44:27,175 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-28 03:44:27,175 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:27,175 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 03:44:27,175 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 03:44:27,175 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-1.c_Iteration6_Loop [2019-11-28 03:44:27,175 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 03:44:27,175 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 03:44:27,176 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:44:27,179 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:44:27,182 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:44:27,184 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:44:27,194 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:44:27,245 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 03:44:27,245 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:27,253 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 03:44:27,254 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 03:44:27,260 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 03:44:27,260 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 03:44:27,270 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 03:44:27,271 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:27,276 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 03:44:27,276 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_~n=0} Honda state: {fibo_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 03:44:27,284 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 03:44:27,285 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:27,289 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 03:44:27,289 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret0=0} Honda state: {fibo_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 03:44:27,297 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 03:44:27,297 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 03:44:27,312 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-28 03:44:27,312 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:27,401 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-28 03:44:27,403 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 03:44:27,404 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 03:44:27,404 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 03:44:27,404 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 03:44:27,404 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-28 03:44:27,404 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:27,404 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 03:44:27,405 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 03:44:27,405 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-1.c_Iteration6_Loop [2019-11-28 03:44:27,405 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 03:44:27,405 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 03:44:27,406 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:44:27,410 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:44:27,413 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:44:27,417 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:44:27,424 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:44:27,469 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 03:44:27,469 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 03:44:27,475 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 03:44:27,477 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 03:44:27,477 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 03:44:27,477 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 03:44:27,477 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 03:44:27,478 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 03:44:27,478 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 03:44:27,478 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 39 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:27,481 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 03:44:27,489 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 03:44:27,492 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 03:44:27,492 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 03:44:27,492 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 03:44:27,492 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 03:44:27,492 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 03:44:27,493 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 03:44:27,493 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 40 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:27,495 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) [2019-11-28 03:44:27,502 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 03:44:27,503 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 03:44:27,503 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 03:44:27,503 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 03:44:27,504 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 03:44:27,504 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 03:44:27,504 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 03:44:27,504 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 41 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:27,506 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) [2019-11-28 03:44:27,521 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 03:44:27,523 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 03:44:27,523 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 03:44:27,523 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 03:44:27,523 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 03:44:27,523 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 03:44:27,524 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 03:44:27,524 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 42 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:27,527 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-28 03:44:27,530 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-28 03:44:27,530 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 03:44:27,535 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-28 03:44:27,536 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-28 03:44:27,536 INFO L510 LassoAnalysis]: Proved termination. [2019-11-28 03:44:27,536 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_#in~n) = 1*fibo_#in~n Supporting invariants [] [2019-11-28 03:44:27,538 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed Waiting until toolchain timeout for monitored process 43 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:27,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:44:27,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:27,589 INFO L255 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-28 03:44:27,591 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:27,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:27,622 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 03:44:27,623 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:27,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 03:44:27,647 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2019-11-28 03:44:27,647 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 494 states and 746 transitions. cyclomatic complexity: 262 Second operand 5 states. [2019-11-28 03:44:27,724 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 494 states and 746 transitions. cyclomatic complexity: 262. Second operand 5 states. Result 507 states and 759 transitions. Complement of second has 13 states. [2019-11-28 03:44:27,724 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2019-11-28 03:44:27,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-11-28 03:44:27,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 12 transitions. [2019-11-28 03:44:27,725 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 12 transitions. Stem has 32 letters. Loop has 4 letters. [2019-11-28 03:44:27,726 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:44:27,726 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-28 03:44:27,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:44:27,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:27,776 INFO L255 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-28 03:44:27,778 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:27,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:27,807 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 03:44:27,807 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:27,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 03:44:27,826 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 3 loop predicates [2019-11-28 03:44:27,826 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 494 states and 746 transitions. cyclomatic complexity: 262 Second operand 5 states. [2019-11-28 03:44:27,896 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 494 states and 746 transitions. cyclomatic complexity: 262. Second operand 5 states. Result 507 states and 759 transitions. Complement of second has 13 states. [2019-11-28 03:44:27,896 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2019-11-28 03:44:27,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-11-28 03:44:27,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 12 transitions. [2019-11-28 03:44:27,897 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 12 transitions. Stem has 32 letters. Loop has 4 letters. [2019-11-28 03:44:27,897 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:44:27,897 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-28 03:44:27,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:44:27,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:27,946 INFO L255 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-28 03:44:27,947 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:27,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:27,977 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 03:44:27,977 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:27,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 03:44:27,997 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2019-11-28 03:44:27,997 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 494 states and 746 transitions. cyclomatic complexity: 262 Second operand 5 states. [2019-11-28 03:44:28,085 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 494 states and 746 transitions. cyclomatic complexity: 262. Second operand 5 states. Result 650 states and 920 transitions. Complement of second has 14 states. [2019-11-28 03:44:28,086 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2019-11-28 03:44:28,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-11-28 03:44:28,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 20 transitions. [2019-11-28 03:44:28,087 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 20 transitions. Stem has 32 letters. Loop has 4 letters. [2019-11-28 03:44:28,088 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:44:28,088 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 20 transitions. Stem has 36 letters. Loop has 4 letters. [2019-11-28 03:44:28,088 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:44:28,089 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 20 transitions. Stem has 32 letters. Loop has 8 letters. [2019-11-28 03:44:28,089 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:44:28,089 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 650 states and 920 transitions. [2019-11-28 03:44:28,098 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2019-11-28 03:44:28,107 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 650 states to 548 states and 806 transitions. [2019-11-28 03:44:28,107 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 199 [2019-11-28 03:44:28,108 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 208 [2019-11-28 03:44:28,108 INFO L73 IsDeterministic]: Start isDeterministic. Operand 548 states and 806 transitions. [2019-11-28 03:44:28,109 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 03:44:28,109 INFO L688 BuchiCegarLoop]: Abstraction has 548 states and 806 transitions. [2019-11-28 03:44:28,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states and 806 transitions. [2019-11-28 03:44:28,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 518. [2019-11-28 03:44:28,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 518 states. [2019-11-28 03:44:28,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 770 transitions. [2019-11-28 03:44:28,128 INFO L711 BuchiCegarLoop]: Abstraction has 518 states and 770 transitions. [2019-11-28 03:44:28,128 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 03:44:28,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-28 03:44:28,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2019-11-28 03:44:28,129 INFO L87 Difference]: Start difference. First operand 518 states and 770 transitions. Second operand 20 states. [2019-11-28 03:44:28,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 03:44:28,473 INFO L93 Difference]: Finished difference Result 585 states and 871 transitions. [2019-11-28 03:44:28,474 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-28 03:44:28,475 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 585 states and 871 transitions. [2019-11-28 03:44:28,483 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2019-11-28 03:44:28,492 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 585 states to 575 states and 857 transitions. [2019-11-28 03:44:28,492 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 221 [2019-11-28 03:44:28,493 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 221 [2019-11-28 03:44:28,493 INFO L73 IsDeterministic]: Start isDeterministic. Operand 575 states and 857 transitions. [2019-11-28 03:44:28,493 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 03:44:28,493 INFO L688 BuchiCegarLoop]: Abstraction has 575 states and 857 transitions. [2019-11-28 03:44:28,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states and 857 transitions. [2019-11-28 03:44:28,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 541. [2019-11-28 03:44:28,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 541 states. [2019-11-28 03:44:28,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 807 transitions. [2019-11-28 03:44:28,516 INFO L711 BuchiCegarLoop]: Abstraction has 541 states and 807 transitions. [2019-11-28 03:44:28,516 INFO L591 BuchiCegarLoop]: Abstraction has 541 states and 807 transitions. [2019-11-28 03:44:28,516 INFO L424 BuchiCegarLoop]: ======== Iteration 7============ [2019-11-28 03:44:28,516 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 541 states and 807 transitions. [2019-11-28 03:44:28,520 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2019-11-28 03:44:28,520 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 03:44:28,521 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 03:44:28,522 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [9, 9, 8, 7, 1, 1, 1, 1, 1, 1] [2019-11-28 03:44:28,522 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2019-11-28 03:44:28,522 INFO L794 eck$LassoCheckResult]: Stem: 8597#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 7; 8598#L25 call main_#t~ret2 := fibo(main_~x~0);< 8631#fiboENTRY ~n := #in~n; 8671#L6 assume !(~n < 1); 8669#L8 assume !(1 == ~n); 8666#L11 call #t~ret0 := fibo(~n - 1);< 8667#fiboENTRY ~n := #in~n; 8677#L6 assume !(~n < 1); 8676#L8 assume !(1 == ~n); 8653#L11 call #t~ret0 := fibo(~n - 1);< 8675#fiboENTRY ~n := #in~n; 8679#L6 assume !(~n < 1); 8660#L8 assume !(1 == ~n); 8655#L11 call #t~ret0 := fibo(~n - 1);< 8657#fiboENTRY ~n := #in~n; 8711#L6 assume !(~n < 1); 8708#L8 assume !(1 == ~n); 8649#L11 call #t~ret0 := fibo(~n - 1);< 8656#fiboENTRY ~n := #in~n; 8721#L6 assume !(~n < 1); 8710#L8 assume !(1 == ~n); 8648#L11 call #t~ret0 := fibo(~n - 1);< 8656#fiboENTRY ~n := #in~n; 8730#L6 assume !(~n < 1); 8796#L8 assume 1 == ~n;#res := 1; 8794#fiboFINAL assume true; 8793#fiboEXIT >#32#return; 8785#L11-1 call #t~ret1 := fibo(~n - 2);< 8792#fiboENTRY ~n := #in~n; 9030#L6 assume !(~n < 1); 9006#L8 assume !(1 == ~n); 8600#L11 call #t~ret0 := fibo(~n - 1);< 8639#fiboENTRY ~n := #in~n; 8640#L6 assume !(~n < 1); 9118#L8 assume !(1 == ~n); 8633#L11 call #t~ret0 := fibo(~n - 1);< 8637#fiboENTRY ~n := #in~n; 8638#L6 assume !(~n < 1); 9103#L8 assume !(1 == ~n); 8634#L11 [2019-11-28 03:44:28,522 INFO L796 eck$LassoCheckResult]: Loop: 8634#L11 call #t~ret0 := fibo(~n - 1);< 8637#fiboENTRY ~n := #in~n; 8638#L6 assume !(~n < 1); 9103#L8 assume !(1 == ~n); 8634#L11 [2019-11-28 03:44:28,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:44:28,523 INFO L82 PathProgramCache]: Analyzing trace with hash -989900256, now seen corresponding path program 2 times [2019-11-28 03:44:28,523 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 03:44:28,525 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857271323] [2019-11-28 03:44:28,525 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 03:44:28,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:28,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:28,778 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 9 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 03:44:28,779 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857271323] [2019-11-28 03:44:28,779 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591003926] [2019-11-28 03:44:28,779 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 03:44:28,812 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-28 03:44:28,812 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 03:44:28,813 INFO L255 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-28 03:44:28,815 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:28,839 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 64 proven. 55 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-28 03:44:28,839 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 03:44:28,839 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 15] total 23 [2019-11-28 03:44:28,840 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970440623] [2019-11-28 03:44:28,840 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-11-28 03:44:28,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:44:28,841 INFO L82 PathProgramCache]: Analyzing trace with hash 1863062, now seen corresponding path program 3 times [2019-11-28 03:44:28,841 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 03:44:28,841 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326529183] [2019-11-28 03:44:28,841 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 03:44:28,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 03:44:28,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 03:44:28,845 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 03:44:28,890 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 03:44:28,891 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 03:44:28,891 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 03:44:28,891 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 03:44:28,891 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-28 03:44:28,891 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:28,892 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 03:44:28,892 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 03:44:28,892 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-1.c_Iteration7_Loop [2019-11-28 03:44:28,892 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 03:44:28,892 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 03:44:28,893 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:44:28,895 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:44:28,896 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:44:28,897 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:44:28,959 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 03:44:28,960 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:28,967 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 03:44:28,967 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 03:44:28,979 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 03:44:28,979 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret0=0} Honda state: {fibo_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 03:44:28,986 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 03:44:28,987 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 46 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:28,990 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 03:44:28,990 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret1=0} Honda state: {fibo_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 03:44:28,999 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 03:44:28,999 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 47 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:29,002 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 03:44:29,003 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 03:44:29,009 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 03:44:29,010 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 48 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:29,043 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-28 03:44:29,043 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 03:44:34,413 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-28 03:44:34,415 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 03:44:34,415 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 03:44:34,416 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 03:44:34,416 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 03:44:34,416 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-28 03:44:34,416 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:34,416 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 03:44:34,416 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 03:44:34,416 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-1.c_Iteration7_Loop [2019-11-28 03:44:34,416 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 03:44:34,416 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 03:44:34,417 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:44:34,418 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:44:34,424 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:44:34,429 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:44:34,484 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 03:44:34,485 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:34,490 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 03:44:34,491 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 03:44:34,491 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 03:44:34,491 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 03:44:34,491 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 03:44:34,492 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 03:44:34,492 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 03:44:34,492 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 03:44:34,494 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 51 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:34,498 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 03:44:34,503 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 03:44:34,503 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 03:44:34,503 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 03:44:34,503 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 03:44:34,503 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 03:44:34,504 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 03:44:34,504 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 03:44:34,505 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:34,510 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 03:44:34,512 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 03:44:34,512 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 03:44:34,512 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 03:44:34,512 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 03:44:34,512 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 03:44:34,512 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 03:44:34,513 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 03:44:34,514 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 53 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 03:44:34,519 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 03:44:34,520 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 03:44:34,520 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 03:44:34,521 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 03:44:34,521 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 03:44:34,521 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. Waiting until toolchain timeout for monitored process 53 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:34,522 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 03:44:34,522 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 03:44:34,524 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-28 03:44:34,526 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-28 03:44:34,526 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:34,530 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-28 03:44:34,530 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-28 03:44:34,530 INFO L510 LassoAnalysis]: Proved termination. [2019-11-28 03:44:34,531 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2019-11-28 03:44:34,532 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-28 03:44:34,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:44:34,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:34,594 INFO L255 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-28 03:44:34,596 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:34,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:34,634 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 03:44:34,635 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:34,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 03:44:34,670 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 4 loop predicates [2019-11-28 03:44:34,671 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 541 states and 807 transitions. cyclomatic complexity: 276 Second operand 6 states. [2019-11-28 03:44:34,737 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 541 states and 807 transitions. cyclomatic complexity: 276. Second operand 6 states. Result 556 states and 823 transitions. Complement of second has 18 states. [2019-11-28 03:44:34,738 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2019-11-28 03:44:34,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-11-28 03:44:34,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 12 transitions. [2019-11-28 03:44:34,738 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 12 transitions. Stem has 39 letters. Loop has 4 letters. [2019-11-28 03:44:34,739 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:44:34,739 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-28 03:44:34,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:44:34,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:34,797 INFO L255 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-28 03:44:34,799 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:34,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:34,826 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 03:44:34,826 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:34,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 03:44:34,848 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 4 loop predicates [2019-11-28 03:44:34,848 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 541 states and 807 transitions. cyclomatic complexity: 276 Second operand 6 states. [2019-11-28 03:44:34,941 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 541 states and 807 transitions. cyclomatic complexity: 276. Second operand 6 states. Result 786 states and 1145 transitions. Complement of second has 22 states. [2019-11-28 03:44:34,942 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2019-11-28 03:44:34,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-11-28 03:44:34,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 15 transitions. [2019-11-28 03:44:34,942 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 15 transitions. Stem has 39 letters. Loop has 4 letters. [2019-11-28 03:44:34,943 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:44:34,943 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 15 transitions. Stem has 43 letters. Loop has 4 letters. [2019-11-28 03:44:34,943 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:44:34,943 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 15 transitions. Stem has 39 letters. Loop has 8 letters. [2019-11-28 03:44:34,943 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:44:34,943 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 786 states and 1145 transitions. [2019-11-28 03:44:34,953 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2019-11-28 03:44:34,964 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 786 states to 719 states and 1073 transitions. [2019-11-28 03:44:34,964 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 241 [2019-11-28 03:44:34,965 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 269 [2019-11-28 03:44:34,965 INFO L73 IsDeterministic]: Start isDeterministic. Operand 719 states and 1073 transitions. [2019-11-28 03:44:34,965 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 03:44:34,966 INFO L688 BuchiCegarLoop]: Abstraction has 719 states and 1073 transitions. [2019-11-28 03:44:34,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states and 1073 transitions. [2019-11-28 03:44:34,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 706. [2019-11-28 03:44:34,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 706 states. [2019-11-28 03:44:34,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706 states to 706 states and 1056 transitions. [2019-11-28 03:44:34,990 INFO L711 BuchiCegarLoop]: Abstraction has 706 states and 1056 transitions. [2019-11-28 03:44:34,990 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 03:44:34,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-28 03:44:34,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2019-11-28 03:44:34,991 INFO L87 Difference]: Start difference. First operand 706 states and 1056 transitions. Second operand 23 states. [2019-11-28 03:44:35,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 03:44:35,679 INFO L93 Difference]: Finished difference Result 1715 states and 3613 transitions. [2019-11-28 03:44:35,680 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-28 03:44:35,680 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1715 states and 3613 transitions. [2019-11-28 03:44:35,708 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 156 [2019-11-28 03:44:35,744 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1715 states to 1469 states and 3094 transitions. [2019-11-28 03:44:35,744 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 506 [2019-11-28 03:44:35,746 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 533 [2019-11-28 03:44:35,746 INFO L73 IsDeterministic]: Start isDeterministic. Operand 1469 states and 3094 transitions. [2019-11-28 03:44:35,746 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 03:44:35,746 INFO L688 BuchiCegarLoop]: Abstraction has 1469 states and 3094 transitions. [2019-11-28 03:44:35,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1469 states and 3094 transitions. [2019-11-28 03:44:35,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1469 to 1302. [2019-11-28 03:44:35,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1302 states. [2019-11-28 03:44:35,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1302 states to 1302 states and 2622 transitions. [2019-11-28 03:44:35,808 INFO L711 BuchiCegarLoop]: Abstraction has 1302 states and 2622 transitions. [2019-11-28 03:44:35,808 INFO L591 BuchiCegarLoop]: Abstraction has 1302 states and 2622 transitions. [2019-11-28 03:44:35,808 INFO L424 BuchiCegarLoop]: ======== Iteration 8============ [2019-11-28 03:44:35,808 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 1302 states and 2622 transitions. [2019-11-28 03:44:35,818 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 147 [2019-11-28 03:44:35,818 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 03:44:35,818 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 03:44:35,819 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [11, 10, 9, 8, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2019-11-28 03:44:35,819 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2019-11-28 03:44:35,819 INFO L794 eck$LassoCheckResult]: Stem: 13390#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~ret2, main_~x~0, main_~result~0;main_~x~0 := 7; 13391#L25 call main_#t~ret2 := fibo(main_~x~0);< 13443#fiboENTRY ~n := #in~n; 13492#L6 assume !(~n < 1); 13491#L8 assume !(1 == ~n); 13487#L11 call #t~ret0 := fibo(~n - 1);< 13490#fiboENTRY ~n := #in~n; 13489#L6 assume !(~n < 1); 13488#L8 assume !(1 == ~n); 13427#L11 call #t~ret0 := fibo(~n - 1);< 13486#fiboENTRY ~n := #in~n; 13485#L6 assume !(~n < 1); 13484#L8 assume !(1 == ~n); 13480#L11 call #t~ret0 := fibo(~n - 1);< 13483#fiboENTRY ~n := #in~n; 13482#L6 assume !(~n < 1); 13481#L8 assume !(1 == ~n); 13475#L11 call #t~ret0 := fibo(~n - 1);< 13479#fiboENTRY ~n := #in~n; 13477#L6 assume !(~n < 1); 13478#L8 assume !(1 == ~n); 13471#L11 call #t~ret0 := fibo(~n - 1);< 13470#fiboENTRY ~n := #in~n; 13473#L6 assume !(~n < 1); 13476#L8 assume !(1 == ~n); 13472#L11 call #t~ret0 := fibo(~n - 1);< 13517#fiboENTRY ~n := #in~n; 13535#L6 assume !(~n < 1); 13532#L8 assume 1 == ~n;#res := 1; 13529#fiboFINAL assume true; 13525#fiboEXIT >#32#return; 13511#L11-1 call #t~ret1 := fibo(~n - 2);< 13512#fiboENTRY ~n := #in~n; 14574#L6 assume ~n < 1;#res := 0; 14573#fiboFINAL assume true; 14570#fiboEXIT >#34#return; 14569#L11-2 #res := #t~ret0 + #t~ret1;havoc #t~ret0;havoc #t~ret1; 14568#fiboFINAL assume true; 14567#fiboEXIT >#32#return; 13440#L11-1 call #t~ret1 := fibo(~n - 2);< 14496#fiboENTRY ~n := #in~n; 14561#L6 assume !(~n < 1); 14535#L8 assume !(1 == ~n); 13448#L11 call #t~ret0 := fibo(~n - 1);< 14103#fiboENTRY ~n := #in~n; 14102#L6 assume !(~n < 1); 14101#L8 assume !(1 == ~n); 13465#L11 call #t~ret0 := fibo(~n - 1);< 13597#fiboENTRY ~n := #in~n; 14081#L6 assume !(~n < 1); 14079#L8 assume !(1 == ~n); 13467#L11 [2019-11-28 03:44:35,820 INFO L796 eck$LassoCheckResult]: Loop: 13467#L11 call #t~ret0 := fibo(~n - 1);< 13597#fiboENTRY ~n := #in~n; 14081#L6 assume !(~n < 1); 14079#L8 assume !(1 == ~n); 13467#L11 [2019-11-28 03:44:35,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:44:35,820 INFO L82 PathProgramCache]: Analyzing trace with hash 1997475882, now seen corresponding path program 3 times [2019-11-28 03:44:35,820 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 03:44:35,820 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175028268] [2019-11-28 03:44:35,820 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 03:44:35,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:36,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:36,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:36,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:36,034 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 129 proven. 47 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-28 03:44:36,034 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175028268] [2019-11-28 03:44:36,034 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423044227] [2019-11-28 03:44:36,035 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 03:44:36,072 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-28 03:44:36,072 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 03:44:36,073 INFO L255 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-28 03:44:36,074 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:36,123 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 106 proven. 19 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2019-11-28 03:44:36,124 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 03:44:36,124 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 11] total 22 [2019-11-28 03:44:36,124 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485474124] [2019-11-28 03:44:36,124 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-11-28 03:44:36,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:44:36,125 INFO L82 PathProgramCache]: Analyzing trace with hash 1863062, now seen corresponding path program 4 times [2019-11-28 03:44:36,125 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 03:44:36,125 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861072672] [2019-11-28 03:44:36,125 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 03:44:36,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 03:44:36,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 03:44:36,129 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 03:44:36,166 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 03:44:36,166 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 03:44:36,166 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 03:44:36,166 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 03:44:36,166 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-28 03:44:36,166 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:36,167 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 03:44:36,167 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 03:44:36,167 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-1.c_Iteration8_Loop [2019-11-28 03:44:36,167 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 03:44:36,167 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 03:44:36,168 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:44:36,176 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:44:36,178 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:44:36,180 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:44:36,228 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 03:44:36,228 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 03:44:36,236 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 03:44:36,236 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 56 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 57 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:36,246 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-28 03:44:36,246 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 03:44:38,918 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-28 03:44:38,920 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 03:44:38,921 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 03:44:38,921 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 03:44:38,921 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 03:44:38,921 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-28 03:44:38,921 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:38,921 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 03:44:38,921 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 03:44:38,921 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-1.c_Iteration8_Loop [2019-11-28 03:44:38,921 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 03:44:38,921 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 03:44:38,922 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:44:38,927 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:44:38,928 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:44:38,930 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 03:44:38,983 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 03:44:38,984 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:38,997 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 03:44:38,999 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 03:44:38,999 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 03:44:38,999 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 03:44:38,999 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 03:44:38,999 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 03:44:39,000 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 03:44:39,000 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 03:44:39,001 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:39,007 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 03:44:39,008 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 03:44:39,008 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 03:44:39,008 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 03:44:39,008 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 03:44:39,008 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 03:44:39,008 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 03:44:39,009 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 03:44:39,010 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:39,015 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 03:44:39,016 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 03:44:39,016 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 03:44:39,016 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 03:44:39,016 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 03:44:39,016 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 03:44:39,018 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 03:44:39,018 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 03:44:39,019 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:39,025 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-28 03:44:39,026 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 03:44:39,026 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 03:44:39,027 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 03:44:39,027 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 03:44:39,027 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 03:44:39,029 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 03:44:39,029 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 03:44:39,032 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-28 03:44:39,034 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-28 03:44:39,034 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 03:44:39,039 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-28 03:44:39,039 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-28 03:44:39,039 INFO L510 LassoAnalysis]: Proved termination. [2019-11-28 03:44:39,039 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2019-11-28 03:44:39,041 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-28 03:44:39,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:44:39,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:39,112 INFO L255 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-28 03:44:39,114 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:39,128 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 03:44:39,131 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 03:44:39,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:39,142 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 03:44:39,142 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:39,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 03:44:39,171 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 4 loop predicates [2019-11-28 03:44:39,172 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 1302 states and 2622 transitions. cyclomatic complexity: 1333 Second operand 6 states. [2019-11-28 03:44:39,248 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 1302 states and 2622 transitions. cyclomatic complexity: 1333. Second operand 6 states. Result 1324 states and 2645 transitions. Complement of second has 18 states. [2019-11-28 03:44:39,248 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2019-11-28 03:44:39,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-11-28 03:44:39,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 12 transitions. [2019-11-28 03:44:39,249 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 12 transitions. Stem has 51 letters. Loop has 4 letters. [2019-11-28 03:44:39,249 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:44:39,249 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-28 03:44:39,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:44:39,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:39,311 INFO L255 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-28 03:44:39,313 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:39,330 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 03:44:39,333 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 03:44:39,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:39,342 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 03:44:39,343 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:39,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 03:44:39,412 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 4 loop predicates [2019-11-28 03:44:39,412 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 1302 states and 2622 transitions. cyclomatic complexity: 1333 Second operand 6 states. [2019-11-28 03:44:39,524 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 1302 states and 2622 transitions. cyclomatic complexity: 1333. Second operand 6 states. Result 1505 states and 2854 transitions. Complement of second has 22 states. [2019-11-28 03:44:39,525 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2019-11-28 03:44:39,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-11-28 03:44:39,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 15 transitions. [2019-11-28 03:44:39,525 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 15 transitions. Stem has 51 letters. Loop has 4 letters. [2019-11-28 03:44:39,525 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:44:39,525 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-28 03:44:39,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 03:44:39,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:39,600 INFO L255 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-28 03:44:39,601 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:39,622 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 03:44:39,624 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-28 03:44:39,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 03:44:39,633 INFO L255 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-28 03:44:39,634 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 03:44:39,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 03:44:39,664 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 4 loop predicates [2019-11-28 03:44:39,664 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 1302 states and 2622 transitions. cyclomatic complexity: 1333 Second operand 6 states. [2019-11-28 03:44:39,743 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 1302 states and 2622 transitions. cyclomatic complexity: 1333. Second operand 6 states. Result 1635 states and 3078 transitions. Complement of second has 27 states. [2019-11-28 03:44:39,743 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2019-11-28 03:44:39,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-11-28 03:44:39,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 21 transitions. [2019-11-28 03:44:39,744 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 51 letters. Loop has 4 letters. [2019-11-28 03:44:39,744 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:44:39,745 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 55 letters. Loop has 4 letters. [2019-11-28 03:44:39,745 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:44:39,745 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 21 transitions. Stem has 51 letters. Loop has 8 letters. [2019-11-28 03:44:39,745 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 03:44:39,746 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1635 states and 3078 transitions. [2019-11-28 03:44:39,770 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 147 [2019-11-28 03:44:39,800 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1635 states to 1302 states and 2622 transitions. [2019-11-28 03:44:39,800 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 411 [2019-11-28 03:44:39,801 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 447 [2019-11-28 03:44:39,801 INFO L73 IsDeterministic]: Start isDeterministic. Operand 1302 states and 2622 transitions. [2019-11-28 03:44:39,801 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 03:44:39,801 INFO L688 BuchiCegarLoop]: Abstraction has 1302 states and 2622 transitions. [2019-11-28 03:44:39,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1302 states and 2622 transitions. [2019-11-28 03:44:39,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1302 to 1302. [2019-11-28 03:44:39,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1302 states. [2019-11-28 03:44:39,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1302 states to 1302 states and 2622 transitions. [2019-11-28 03:44:39,857 INFO L711 BuchiCegarLoop]: Abstraction has 1302 states and 2622 transitions. [2019-11-28 03:44:39,858 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 03:44:39,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-28 03:44:39,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2019-11-28 03:44:39,858 INFO L87 Difference]: Start difference. First operand 1302 states and 2622 transitions. Second operand 22 states. [2019-11-28 03:44:40,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 03:44:40,200 INFO L93 Difference]: Finished difference Result 400 states and 513 transitions. [2019-11-28 03:44:40,201 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-28 03:44:40,201 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 400 states and 513 transitions. [2019-11-28 03:44:40,205 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2019-11-28 03:44:40,206 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 400 states to 0 states and 0 transitions. [2019-11-28 03:44:40,206 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2019-11-28 03:44:40,206 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2019-11-28 03:44:40,206 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2019-11-28 03:44:40,206 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2019-11-28 03:44:40,206 INFO L688 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-28 03:44:40,207 INFO L711 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-28 03:44:40,207 INFO L591 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-28 03:44:40,207 INFO L424 BuchiCegarLoop]: ======== Iteration 9============ [2019-11-28 03:44:40,207 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2019-11-28 03:44:40,207 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2019-11-28 03:44:40,207 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2019-11-28 03:44:40,215 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 28.11 03:44:40 BoogieIcfgContainer [2019-11-28 03:44:40,216 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2019-11-28 03:44:40,216 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-28 03:44:40,217 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-28 03:44:40,217 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-28 03:44:40,217 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:44:19" (3/4) ... [2019-11-28 03:44:40,221 INFO L140 WitnessPrinter]: No result that supports witness generation found [2019-11-28 03:44:40,221 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-28 03:44:40,224 INFO L168 Benchmark]: Toolchain (without parser) took 20935.43 ms. Allocated memory was 1.0 GB in the beginning and 1.4 GB in the end (delta: 348.7 MB). Free memory was 955.0 MB in the beginning and 1.2 GB in the end (delta: -213.0 MB). Peak memory consumption was 135.7 MB. Max. memory is 11.5 GB. [2019-11-28 03:44:40,224 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 1.0 GB. Free memory is still 981.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 03:44:40,224 INFO L168 Benchmark]: CACSL2BoogieTranslator took 234.25 ms. Allocated memory is still 1.0 GB. Free memory was 955.0 MB in the beginning and 944.3 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-11-28 03:44:40,225 INFO L168 Benchmark]: Boogie Procedure Inliner took 29.87 ms. Allocated memory is still 1.0 GB. Free memory is still 944.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 03:44:40,225 INFO L168 Benchmark]: Boogie Preprocessor took 80.12 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 147.8 MB). Free memory was 944.3 MB in the beginning and 1.1 GB in the end (delta: -200.1 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. [2019-11-28 03:44:40,226 INFO L168 Benchmark]: RCFGBuilder took 200.43 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: 19.2 MB). Peak memory consumption was 19.2 MB. Max. memory is 11.5 GB. [2019-11-28 03:44:40,232 INFO L168 Benchmark]: BuchiAutomizer took 20378.22 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 200.8 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -42.8 MB). Peak memory consumption was 158.0 MB. Max. memory is 11.5 GB. [2019-11-28 03:44:40,232 INFO L168 Benchmark]: Witness Printer took 5.06 ms. Allocated memory is still 1.4 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 03:44:40,237 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 1.0 GB. Free memory is still 981.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 234.25 ms. Allocated memory is still 1.0 GB. Free memory was 955.0 MB in the beginning and 944.3 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 29.87 ms. Allocated memory is still 1.0 GB. Free memory is still 944.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 80.12 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 147.8 MB). Free memory was 944.3 MB in the beginning and 1.1 GB in the end (delta: -200.1 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 200.43 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: 19.2 MB). Peak memory consumption was 19.2 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 20378.22 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 200.8 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -42.8 MB). Peak memory consumption was 158.0 MB. Max. memory is 11.5 GB. * Witness Printer took 5.06 ms. Allocated memory is still 1.4 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 13 terminating modules (7 trivial, 3 deterministic, 3 nondeterministic). One deterministic module has affine ranking function \old(n) and consists of 4 locations. One deterministic module has affine ranking function n and consists of 7 locations. One deterministic module has affine ranking function n and consists of 7 locations. One nondeterministic module has affine ranking function n and consists of 9 locations. One nondeterministic module has affine ranking function \old(n) and consists of 5 locations. One nondeterministic module has affine ranking function n and consists of 6 locations. 7 modules have a trivial ranking function, the largest among these consists of 23 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 20.3s and 9 iterations. TraceHistogramMax:11. Analysis of lassos took 13.7s. Construction of modules took 1.7s. Büchi inclusion checks took 3.9s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 12. Automata minimization 0.3s AutomataMinimizationTime, 12 MinimizatonAttempts, 442 StatesRemovedByMinimization, 9 NontrivialMinimizations. Non-live state removal took 0.3s Buchi closure took 0.0s. Biggest automaton had 1302 states and ocurred in iteration 7. Nontrivial modules had stage [2, 1, 3, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 10/26 HoareTripleCheckerStatistics: 242 SDtfs, 659 SDslu, 475 SDs, 0 SdLazy, 1881 SolverSat, 522 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.7s Time LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT1 conc0 concLT0 SILN0 SILU0 SILI2 SILT5 lasso0 LassoPreprocessingBenchmarks: Lassos: inital17 mio100 ax100 hnf98 lsp94 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq180 hnf93 smp78 dnf100 smp100 tf109 neg96 sie109 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 15ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 13 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 6 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 9.4s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...