./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/recursive-simple/fibo_2calls_6-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 9a8b2e8d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerTermination.xml -i ../sv-benchmarks/c/recursive-simple/fibo_2calls_6-1.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 f8ce463a68003145f68f57eef3f97a99b93a908a ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-9a8b2e8 [2020-10-20 08:00:44,907 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 08:00:44,910 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 08:00:44,948 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 08:00:44,948 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 08:00:44,962 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 08:00:44,963 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 08:00:44,966 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 08:00:44,969 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 08:00:44,979 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 08:00:44,981 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 08:00:44,984 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 08:00:44,984 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 08:00:44,991 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 08:00:44,992 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 08:00:44,995 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 08:00:44,997 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 08:00:44,999 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 08:00:45,003 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 08:00:45,008 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 08:00:45,011 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 08:00:45,012 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 08:00:45,014 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 08:00:45,015 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 08:00:45,020 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 08:00:45,021 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 08:00:45,021 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 08:00:45,023 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 08:00:45,023 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 08:00:45,024 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 08:00:45,025 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 08:00:45,025 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 08:00:45,026 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 08:00:45,027 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 08:00:45,029 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 08:00:45,029 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 08:00:45,030 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 08:00:45,030 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 08:00:45,030 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 08:00:45,031 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 08:00:45,032 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 08:00:45,033 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-32bit-Automizer_Default.epf [2020-10-20 08:00:45,080 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 08:00:45,080 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 08:00:45,083 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 08:00:45,083 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 08:00:45,083 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 08:00:45,084 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2020-10-20 08:00:45,084 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2020-10-20 08:00:45,084 INFO L138 SettingsManager]: * Use old map elimination=false [2020-10-20 08:00:45,084 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2020-10-20 08:00:45,085 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2020-10-20 08:00:45,086 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2020-10-20 08:00:45,086 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 08:00:45,087 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-20 08:00:45,087 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-10-20 08:00:45,087 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-20 08:00:45,088 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-20 08:00:45,088 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 08:00:45,088 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2020-10-20 08:00:45,088 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2020-10-20 08:00:45,089 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2020-10-20 08:00:45,089 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-20 08:00:45,089 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-20 08:00:45,089 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2020-10-20 08:00:45,090 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 08:00:45,090 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2020-10-20 08:00:45,090 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 08:00:45,090 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 08:00:45,091 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2020-10-20 08:00:45,091 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 08:00:45,091 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-20 08:00:45,091 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 08:00:45,092 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2020-10-20 08:00:45,093 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2020-10-20 08:00:45,093 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 -> f8ce463a68003145f68f57eef3f97a99b93a908a [2020-10-20 08:00:45,330 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 08:00:45,343 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 08:00:45,347 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 08:00:45,348 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 08:00:45,349 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 08:00:45,350 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/fibo_2calls_6-1.c [2020-10-20 08:00:45,425 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/df4417dd6/2731cec7efdf4528bab8922a5df05ebd/FLAG768a48ec4 [2020-10-20 08:00:45,919 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 08:00:45,919 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_2calls_6-1.c [2020-10-20 08:00:45,925 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/df4417dd6/2731cec7efdf4528bab8922a5df05ebd/FLAG768a48ec4 [2020-10-20 08:00:46,276 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/df4417dd6/2731cec7efdf4528bab8922a5df05ebd [2020-10-20 08:00:46,279 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 08:00:46,287 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-20 08:00:46,288 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 08:00:46,288 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 08:00:46,292 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 08:00:46,293 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 08:00:46" (1/1) ... [2020-10-20 08:00:46,297 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3577a696 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 08:00:46, skipping insertion in model container [2020-10-20 08:00:46,298 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 08:00:46" (1/1) ... [2020-10-20 08:00:46,306 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 08:00:46,327 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 08:00:46,685 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 08:00:46,701 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 08:00:46,723 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 08:00:46,743 INFO L208 MainTranslator]: Completed translation [2020-10-20 08:00:46,744 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 08:00:46 WrapperNode [2020-10-20 08:00:46,746 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 08:00:46,747 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-20 08:00:46,748 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-20 08:00:46,748 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-20 08:00:46,757 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 08:00:46" (1/1) ... [2020-10-20 08:00:46,767 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 08:00:46" (1/1) ... [2020-10-20 08:00:46,788 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-20 08:00:46,788 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 08:00:46,788 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 08:00:46,788 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 08:00:46,796 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 08:00:46" (1/1) ... [2020-10-20 08:00:46,796 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 08:00:46" (1/1) ... [2020-10-20 08:00:46,797 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 08:00:46" (1/1) ... [2020-10-20 08:00:46,798 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 08:00:46" (1/1) ... [2020-10-20 08:00:46,802 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 08:00:46" (1/1) ... [2020-10-20 08:00:46,804 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 08:00:46" (1/1) ... [2020-10-20 08:00:46,806 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 08:00:46" (1/1) ... [2020-10-20 08:00:46,808 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 08:00:46,808 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 08:00:46,809 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 08:00:46,809 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 08:00:46,810 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 08:00:46" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:46,884 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-20 08:00:46,885 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-10-20 08:00:46,885 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-10-20 08:00:46,885 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-20 08:00:46,886 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-10-20 08:00:46,887 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-10-20 08:00:46,887 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 08:00:46,887 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 08:00:47,117 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 08:00:47,118 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-20 08:00:47,120 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 08:00:47 BoogieIcfgContainer [2020-10-20 08:00:47,120 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 08:00:47,121 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2020-10-20 08:00:47,121 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2020-10-20 08:00:47,125 INFO L275 PluginConnector]: BuchiAutomizer initialized [2020-10-20 08:00:47,126 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-20 08:00:47,127 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 20.10 08:00:46" (1/3) ... [2020-10-20 08:00:47,128 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@6e2d3c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 20.10 08:00:47, skipping insertion in model container [2020-10-20 08:00:47,129 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-20 08:00:47,129 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 08:00:46" (2/3) ... [2020-10-20 08:00:47,129 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@6e2d3c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 20.10 08:00:47, skipping insertion in model container [2020-10-20 08:00:47,130 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-20 08:00:47,130 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 08:00:47" (3/3) ... [2020-10-20 08:00:47,134 INFO L373 chiAutomizerObserver]: Analyzing ICFG fibo_2calls_6-1.c [2020-10-20 08:00:47,229 INFO L359 BuchiCegarLoop]: Interprodecural is true [2020-10-20 08:00:47,230 INFO L360 BuchiCegarLoop]: Hoare is false [2020-10-20 08:00:47,230 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2020-10-20 08:00:47,230 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 08:00:47,231 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 08:00:47,231 INFO L364 BuchiCegarLoop]: Difference is false [2020-10-20 08:00:47,231 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 08:00:47,231 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2020-10-20 08:00:47,248 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 27 states. [2020-10-20 08:00:47,272 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2020-10-20 08:00:47,272 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 08:00:47,273 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 08:00:47,280 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2020-10-20 08:00:47,280 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 08:00:47,280 INFO L427 BuchiCegarLoop]: ======== Iteration 1============ [2020-10-20 08:00:47,281 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 27 states. [2020-10-20 08:00:47,284 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2020-10-20 08:00:47,284 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 08:00:47,284 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 08:00:47,285 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2020-10-20 08:00:47,285 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 08:00:47,292 INFO L794 eck$LassoCheckResult]: Stem: 26#ULTIMATE.startENTRYtrue #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(18);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 12#L-1true havoc main_#res;havoc main_#t~ret11, main_~x~0, main_~result~0;main_~x~0 := 6; 22#L39true call main_#t~ret11 := fibo1(main_~x~0);< 27#fibo1ENTRYtrue [2020-10-20 08:00:47,293 INFO L796 eck$LassoCheckResult]: Loop: 27#fibo1ENTRYtrue ~n := #in~n; 4#L10true assume !(~n < 1); 10#L12true assume !(1 == ~n); 13#L15true call #t~ret7 := fibo2(~n - 1);< 15#fibo2ENTRYtrue ~n := #in~n; 28#L20true assume !(~n < 1); 20#L22true assume !(1 == ~n); 9#L25true call #t~ret9 := fibo1(~n - 1);< 27#fibo1ENTRYtrue [2020-10-20 08:00:47,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:47,299 INFO L82 PathProgramCache]: Analyzing trace with hash 29898, now seen corresponding path program 1 times [2020-10-20 08:00:47,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:00:47,307 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755170322] [2020-10-20 08:00:47,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:00:47,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:00:47,411 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:00:47,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:00:47,427 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:00:47,450 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 08:00:47,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:47,452 INFO L82 PathProgramCache]: Analyzing trace with hash 1206117480, now seen corresponding path program 1 times [2020-10-20 08:00:47,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:00:47,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034223915] [2020-10-20 08:00:47,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:00:47,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:00:47,462 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:00:47,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:00:47,469 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:00:47,471 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 08:00:47,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:47,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1276411855, now seen corresponding path program 1 times [2020-10-20 08:00:47,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:00:47,477 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556839251] [2020-10-20 08:00:47,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:00:47,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:00:47,520 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:00:47,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:00:47,554 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:00:47,565 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 08:00:47,781 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 08:00:47,782 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 08:00:47,782 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 08:00:47,782 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 08:00:47,782 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-20 08:00:47,782 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:47,783 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 08:00:47,783 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 08:00:47,783 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_6-1.c_Iteration1_Loop [2020-10-20 08:00:47,783 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 08:00:47,783 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 08:00:47,804 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:47,812 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:47,816 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:47,819 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:47,822 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:47,826 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:47,830 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:47,833 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:47,836 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:47,854 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:47,955 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 08:00:47,956 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:00:47,966 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:00:47,966 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:47,977 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:00:47,977 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#res=0} Honda state: {fibo2_#res=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 [2020-10-20 08:00:48,024 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:00:48,025 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:00:48,029 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:00:48,029 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#res=0} Honda state: {fibo1_#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) [2020-10-20 08:00:48,071 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:00:48,071 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:48,077 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:00:48,077 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#in~n=0} Honda state: {fibo2_#in~n=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) [2020-10-20 08:00:48,118 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:00:48,118 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 [2020-10-20 08:00:48,123 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:00:48,123 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#t~ret7=0} Honda state: {fibo1_#t~ret7=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) [2020-10-20 08:00:48,176 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:00:48,177 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:48,181 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:00:48,182 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#t~ret8=0} Honda state: {fibo1_#t~ret8=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] 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) [2020-10-20 08:00:48,232 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:00:48,232 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:48,242 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:00:48,242 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_~n=0} Honda state: {fibo2_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] 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) [2020-10-20 08:00:48,291 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:00:48,292 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:48,296 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:00:48,296 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_~n=0} Honda state: {fibo1_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:48,331 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:00:48,331 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:00:48,340 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:00:48,341 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#t~ret9=0} Honda state: {fibo2_#t~ret9=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:48,365 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:00:48,365 INFO L160 nArgumentSynthesizer]: Using integer mode. 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) [2020-10-20 08:00:48,396 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-20 08:00:48,397 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:48,458 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-20 08:00:48,460 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 08:00:48,460 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 08:00:48,460 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 08:00:48,460 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 08:00:48,461 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-20 08:00:48,461 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:48,461 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 08:00:48,461 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 08:00:48,462 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_6-1.c_Iteration1_Loop [2020-10-20 08:00:48,462 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 08:00:48,462 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 08:00:48,464 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:48,467 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:48,470 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:48,472 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:48,475 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:48,478 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:48,481 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:48,484 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:48,486 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:48,497 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:48,577 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 08:00:48,583 INFO L489 LassoAnalysis]: Using template 'affine'. 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) [2020-10-20 08:00:48,604 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 08:00:48,606 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:00:48,607 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:00:48,608 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:00:48,608 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:00:48,608 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:00:48,611 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:00:48,611 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:48,617 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 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:00:48,653 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 [2020-10-20 08:00:48,655 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:00:48,655 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:00:48,656 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:00:48,656 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:00:48,656 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:00:48,657 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:00:48,657 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:48,662 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 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:00:48,713 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 08:00:48,715 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:00:48,716 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:00:48,716 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:00:48,716 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:00:48,716 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:00:48,717 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:00:48,718 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:48,723 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 15 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 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:48,772 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 08:00:48,774 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:00:48,774 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:00:48,774 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:00:48,774 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:00:48,775 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:00:48,776 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:00:48,776 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:00:48,778 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 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:00:48,832 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 08:00:48,834 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:00:48,835 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:00:48,835 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:00:48,835 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:00:48,835 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:00:48,836 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:00:48,836 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:00:48,838 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. 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) [2020-10-20 08:00:48,892 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 08:00:48,893 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:00:48,894 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:00:48,894 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:00:48,894 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:00:48,894 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:00:48,895 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:00:48,895 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:48,897 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 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:00:48,948 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 08:00:48,949 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:00:48,950 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:00:48,950 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:00:48,950 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:00:48,950 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:00:48,951 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:00:48,951 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 [2020-10-20 08:00:48,953 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) [2020-10-20 08:00:48,999 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 08:00:49,000 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:00:49,001 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:00:49,001 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:00:49,001 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:00:49,001 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:00:49,002 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:00:49,002 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:49,005 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 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:00:49,053 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 [2020-10-20 08:00:49,054 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:00:49,055 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:00:49,055 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:00:49,055 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:00:49,055 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:00:49,056 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:00:49,056 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:49,060 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-20 08:00:49,067 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2020-10-20 08:00:49,068 INFO L444 ModelExtractionUtils]: 1 out of 3 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 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:00:49,091 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-20 08:00:49,092 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-20 08:00:49,092 INFO L510 LassoAnalysis]: Proved termination. [2020-10-20 08:00:49,093 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo1_#in~n) = 1*fibo1_#in~n Supporting invariants [] Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:49,132 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-20 08:00:49,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:49,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:49,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-20 08:00:49,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:49,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:49,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-20 08:00:49,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:49,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 08:00:49,363 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 5 loop predicates [2020-10-20 08:00:49,365 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 27 states. Second operand 6 states. [2020-10-20 08:00:49,584 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 27 states.. Second operand 6 states. Result 85 states and 117 transitions. Complement of second has 24 states. [2020-10-20 08:00:49,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 1 stem states 5 non-accepting loop states 1 accepting loop states [2020-10-20 08:00:49,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-20 08:00:49,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 21 transitions. [2020-10-20 08:00:49,590 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 21 transitions. Stem has 3 letters. Loop has 8 letters. [2020-10-20 08:00:49,592 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:00:49,593 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 21 transitions. Stem has 11 letters. Loop has 8 letters. [2020-10-20 08:00:49,593 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:00:49,593 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 21 transitions. Stem has 3 letters. Loop has 16 letters. [2020-10-20 08:00:49,593 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:00:49,595 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 85 states and 117 transitions. [2020-10-20 08:00:49,603 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2020-10-20 08:00:49,614 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 85 states to 61 states and 82 transitions. [2020-10-20 08:00:49,615 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 39 [2020-10-20 08:00:49,616 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 40 [2020-10-20 08:00:49,617 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 82 transitions. [2020-10-20 08:00:49,619 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 08:00:49,619 INFO L691 BuchiCegarLoop]: Abstraction has 61 states and 82 transitions. [2020-10-20 08:00:49,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states and 82 transitions. [2020-10-20 08:00:49,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 54. [2020-10-20 08:00:49,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-20 08:00:49,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 72 transitions. [2020-10-20 08:00:49,659 INFO L714 BuchiCegarLoop]: Abstraction has 54 states and 72 transitions. [2020-10-20 08:00:49,660 INFO L594 BuchiCegarLoop]: Abstraction has 54 states and 72 transitions. [2020-10-20 08:00:49,660 INFO L427 BuchiCegarLoop]: ======== Iteration 2============ [2020-10-20 08:00:49,660 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 54 states and 72 transitions. [2020-10-20 08:00:49,662 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2020-10-20 08:00:49,662 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 08:00:49,662 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 08:00:49,664 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 08:00:49,664 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 08:00:49,664 INFO L794 eck$LassoCheckResult]: Stem: 234#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(18);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 230#L-1 havoc main_#res;havoc main_#t~ret11, main_~x~0, main_~result~0;main_~x~0 := 6; 216#L39 call main_#t~ret11 := fibo1(main_~x~0);< 222#fibo1ENTRY ~n := #in~n; 215#L10 assume !(~n < 1); 217#L12 assume !(1 == ~n); 201#L15 call #t~ret7 := fibo2(~n - 1);< 233#fibo2ENTRY ~n := #in~n; 237#L20 assume !(~n < 1); 251#L22 assume !(1 == ~n); 212#L25 call #t~ret9 := fibo1(~n - 1);< 227#fibo1ENTRY ~n := #in~n; 211#L10 assume ~n < 1;#res := 0; 213#fibo1FINAL assume true; 220#fibo1EXIT >#48#return; 221#L25-1 [2020-10-20 08:00:49,664 INFO L796 eck$LassoCheckResult]: Loop: 221#L25-1 call #t~ret10 := fibo1(~n - 2);< 226#fibo1ENTRY ~n := #in~n; 246#L10 assume !(~n < 1); 247#L12 assume !(1 == ~n); 200#L15 call #t~ret7 := fibo2(~n - 1);< 239#fibo2ENTRY ~n := #in~n; 244#L20 assume !(~n < 1); 243#L22 assume !(1 == ~n); 224#L25 call #t~ret9 := fibo1(~n - 1);< 226#fibo1ENTRY ~n := #in~n; 246#L10 assume ~n < 1;#res := 0; 225#fibo1FINAL assume true; 229#fibo1EXIT >#48#return; 221#L25-1 [2020-10-20 08:00:49,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:49,665 INFO L82 PathProgramCache]: Analyzing trace with hash -722660232, now seen corresponding path program 1 times [2020-10-20 08:00:49,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:00:49,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068715110] [2020-10-20 08:00:49,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:00:49,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:49,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-20 08:00:49,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:49,824 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-20 08:00:49,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068715110] [2020-10-20 08:00:49,825 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 08:00:49,826 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-20 08:00:49,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142527709] [2020-10-20 08:00:49,830 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-20 08:00:49,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:49,830 INFO L82 PathProgramCache]: Analyzing trace with hash -880179458, now seen corresponding path program 1 times [2020-10-20 08:00:49,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:00:49,831 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425107240] [2020-10-20 08:00:49,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:00:49,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:49,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-20 08:00:49,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:49,876 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-20 08:00:49,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425107240] [2020-10-20 08:00:49,876 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 08:00:49,876 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-20 08:00:49,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911673358] [2020-10-20 08:00:49,877 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-10-20 08:00:49,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 08:00:49,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-20 08:00:49,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-20 08:00:49,883 INFO L87 Difference]: Start difference. First operand 54 states and 72 transitions. cyclomatic complexity: 20 Second operand 6 states. [2020-10-20 08:00:49,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 08:00:49,986 INFO L93 Difference]: Finished difference Result 68 states and 88 transitions. [2020-10-20 08:00:49,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-20 08:00:49,988 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 68 states and 88 transitions. [2020-10-20 08:00:49,992 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2020-10-20 08:00:49,995 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 68 states to 66 states and 86 transitions. [2020-10-20 08:00:49,996 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 46 [2020-10-20 08:00:49,996 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 46 [2020-10-20 08:00:49,996 INFO L73 IsDeterministic]: Start isDeterministic. Operand 66 states and 86 transitions. [2020-10-20 08:00:49,997 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 08:00:49,997 INFO L691 BuchiCegarLoop]: Abstraction has 66 states and 86 transitions. [2020-10-20 08:00:49,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states and 86 transitions. [2020-10-20 08:00:50,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 58. [2020-10-20 08:00:50,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-20 08:00:50,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 76 transitions. [2020-10-20 08:00:50,008 INFO L714 BuchiCegarLoop]: Abstraction has 58 states and 76 transitions. [2020-10-20 08:00:50,008 INFO L594 BuchiCegarLoop]: Abstraction has 58 states and 76 transitions. [2020-10-20 08:00:50,008 INFO L427 BuchiCegarLoop]: ======== Iteration 3============ [2020-10-20 08:00:50,008 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 58 states and 76 transitions. [2020-10-20 08:00:50,010 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2020-10-20 08:00:50,010 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 08:00:50,010 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 08:00:50,012 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 08:00:50,012 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 08:00:50,012 INFO L794 eck$LassoCheckResult]: Stem: 375#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(18);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 374#L-1 havoc main_#res;havoc main_#t~ret11, main_~x~0, main_~result~0;main_~x~0 := 6; 355#L39 call main_#t~ret11 := fibo1(main_~x~0);< 364#fibo1ENTRY ~n := #in~n; 354#L10 assume !(~n < 1); 356#L12 assume !(1 == ~n); 346#L15 call #t~ret7 := fibo2(~n - 1);< 378#fibo2ENTRY ~n := #in~n; 399#L20 assume !(~n < 1); 400#L22 assume !(1 == ~n); 352#L25 call #t~ret9 := fibo1(~n - 1);< 371#fibo1ENTRY ~n := #in~n; 351#L10 assume !(~n < 1); 353#L12 assume 1 == ~n;#res := 1; 372#fibo1FINAL assume true; 365#fibo1EXIT >#48#return; 366#L25-1 [2020-10-20 08:00:50,012 INFO L796 eck$LassoCheckResult]: Loop: 366#L25-1 call #t~ret10 := fibo1(~n - 2);< 370#fibo1ENTRY ~n := #in~n; 389#L10 assume !(~n < 1); 390#L12 assume !(1 == ~n); 344#L15 call #t~ret7 := fibo2(~n - 1);< 388#fibo2ENTRY ~n := #in~n; 395#L20 assume !(~n < 1); 393#L22 assume !(1 == ~n); 368#L25 call #t~ret9 := fibo1(~n - 1);< 370#fibo1ENTRY ~n := #in~n; 389#L10 assume !(~n < 1); 390#L12 assume 1 == ~n;#res := 1; 369#fibo1FINAL assume true; 373#fibo1EXIT >#48#return; 366#L25-1 [2020-10-20 08:00:50,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:50,013 INFO L82 PathProgramCache]: Analyzing trace with hash -927605802, now seen corresponding path program 1 times [2020-10-20 08:00:50,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:00:50,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925615588] [2020-10-20 08:00:50,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:00:50,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:50,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-20 08:00:50,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:50,126 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 08:00:50,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925615588] [2020-10-20 08:00:50,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46599878] [2020-10-20 08:00:50,127 INFO L95 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 [2020-10-20 08:00:50,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:50,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-20 08:00:50,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:50,249 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 08:00:50,250 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 08:00:50,250 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-20 08:00:50,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268987005] [2020-10-20 08:00:50,251 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-20 08:00:50,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:50,252 INFO L82 PathProgramCache]: Analyzing trace with hash -1515734512, now seen corresponding path program 1 times [2020-10-20 08:00:50,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:00:50,252 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044230707] [2020-10-20 08:00:50,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:00:50,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:00:50,259 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:00:50,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:00:50,265 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:00:50,268 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 08:00:50,443 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 08:00:50,443 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 08:00:50,444 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 08:00:50,444 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 08:00:50,444 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-20 08:00:50,444 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:50,444 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 08:00:50,444 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 08:00:50,445 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_6-1.c_Iteration3_Loop [2020-10-20 08:00:50,445 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 08:00:50,445 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 08:00:50,447 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:50,450 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:50,452 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:50,455 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:50,458 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:50,466 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:50,468 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:50,473 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:50,480 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:50,541 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 08:00:50,542 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:00:50,545 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:00:50,545 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:50,550 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:00:50,550 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#t~ret7=0} Honda state: {fibo1_#t~ret7=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] 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) [2020-10-20 08:00:50,578 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:00:50,579 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:50,582 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:00:50,583 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#t~ret8=0} Honda state: {fibo1_#t~ret8=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 [2020-10-20 08:00:50,608 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:00:50,608 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:00:50,611 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:00:50,611 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#in~n=0} Honda state: {fibo1_#in~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:50,636 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:00:50,636 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:00:50,639 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:00:50,639 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_~n=0} Honda state: {fibo1_~n=0} 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 [2020-10-20 08:00:50,662 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:00:50,662 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 [2020-10-20 08:00:50,695 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-20 08:00:50,695 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:00:51,296 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-20 08:00:51,298 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 08:00:51,298 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 08:00:51,298 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 08:00:51,298 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 08:00:51,298 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-20 08:00:51,298 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:51,298 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 08:00:51,298 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 08:00:51,298 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_6-1.c_Iteration3_Loop [2020-10-20 08:00:51,299 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 08:00:51,299 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 08:00:51,300 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:51,303 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:51,307 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:51,309 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:51,318 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:51,322 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:51,324 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:51,326 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:51,329 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:51,382 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 08:00:51,382 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) [2020-10-20 08:00:51,390 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 08:00:51,392 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:00:51,392 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:00:51,392 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:00:51,393 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:00:51,393 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:00:51,394 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:00:51,394 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:51,396 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 [2020-10-20 08:00:51,438 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 08:00:51,439 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:00:51,439 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:00:51,439 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:00:51,439 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:00:51,439 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:00:51,440 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:00:51,440 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:00:51,441 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) [2020-10-20 08:00:51,464 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 08:00:51,465 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:00:51,465 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:00:51,466 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:00:51,466 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:00:51,466 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:00:51,466 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:00:51,466 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:00:51,468 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. Waiting until toolchain timeout for monitored process 31 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 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:51,493 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 08:00:51,494 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:00:51,495 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:00:51,495 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:00:51,495 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:00:51,495 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:00:51,496 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:00:51,496 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:00:51,499 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-20 08:00:51,512 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-20 08:00:51,512 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 33 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:00:51,533 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-20 08:00:51,534 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-20 08:00:51,534 INFO L510 LassoAnalysis]: Proved termination. [2020-10-20 08:00:51,534 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo2_~n) = 1*fibo2_~n Supporting invariants [] Waiting until toolchain timeout for monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:51,568 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-20 08:00:51,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:51,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:51,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-20 08:00:51,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:51,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:51,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-20 08:00:51,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:51,814 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 08:00:51,815 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 8 loop predicates [2020-10-20 08:00:51,815 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 58 states and 76 transitions. cyclomatic complexity: 20 Second operand 10 states. [2020-10-20 08:00:52,346 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 58 states and 76 transitions. cyclomatic complexity: 20. Second operand 10 states. Result 191 states and 263 transitions. Complement of second has 40 states. [2020-10-20 08:00:52,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 12 states 2 stem states 9 non-accepting loop states 1 accepting loop states [2020-10-20 08:00:52,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-10-20 08:00:52,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 73 transitions. [2020-10-20 08:00:52,351 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 73 transitions. Stem has 16 letters. Loop has 14 letters. [2020-10-20 08:00:52,353 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:00:52,353 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 73 transitions. Stem has 30 letters. Loop has 14 letters. [2020-10-20 08:00:52,354 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:00:52,354 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 73 transitions. Stem has 16 letters. Loop has 28 letters. [2020-10-20 08:00:52,355 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:00:52,356 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 191 states and 263 transitions. [2020-10-20 08:00:52,363 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 20 [2020-10-20 08:00:52,369 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 191 states to 169 states and 237 transitions. [2020-10-20 08:00:52,369 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 103 [2020-10-20 08:00:52,370 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 106 [2020-10-20 08:00:52,370 INFO L73 IsDeterministic]: Start isDeterministic. Operand 169 states and 237 transitions. [2020-10-20 08:00:52,371 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 08:00:52,372 INFO L691 BuchiCegarLoop]: Abstraction has 169 states and 237 transitions. [2020-10-20 08:00:52,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states and 237 transitions. [2020-10-20 08:00:52,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 152. [2020-10-20 08:00:52,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-10-20 08:00:52,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 206 transitions. [2020-10-20 08:00:52,391 INFO L714 BuchiCegarLoop]: Abstraction has 152 states and 206 transitions. [2020-10-20 08:00:52,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 08:00:52,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-20 08:00:52,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-20 08:00:52,392 INFO L87 Difference]: Start difference. First operand 152 states and 206 transitions. Second operand 10 states. [2020-10-20 08:00:52,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 08:00:52,595 INFO L93 Difference]: Finished difference Result 183 states and 244 transitions. [2020-10-20 08:00:52,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-20 08:00:52,599 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 183 states and 244 transitions. [2020-10-20 08:00:52,607 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 20 [2020-10-20 08:00:52,619 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 183 states to 180 states and 240 transitions. [2020-10-20 08:00:52,622 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 117 [2020-10-20 08:00:52,623 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 117 [2020-10-20 08:00:52,623 INFO L73 IsDeterministic]: Start isDeterministic. Operand 180 states and 240 transitions. [2020-10-20 08:00:52,624 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 08:00:52,624 INFO L691 BuchiCegarLoop]: Abstraction has 180 states and 240 transitions. [2020-10-20 08:00:52,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states and 240 transitions. [2020-10-20 08:00:52,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 167. [2020-10-20 08:00:52,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-20 08:00:52,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 225 transitions. [2020-10-20 08:00:52,664 INFO L714 BuchiCegarLoop]: Abstraction has 167 states and 225 transitions. [2020-10-20 08:00:52,664 INFO L594 BuchiCegarLoop]: Abstraction has 167 states and 225 transitions. [2020-10-20 08:00:52,664 INFO L427 BuchiCegarLoop]: ======== Iteration 4============ [2020-10-20 08:00:52,665 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 167 states and 225 transitions. [2020-10-20 08:00:52,669 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 20 [2020-10-20 08:00:52,671 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 08:00:52,672 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 08:00:52,679 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [8, 7, 6, 6, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2020-10-20 08:00:52,679 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [6, 5, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2020-10-20 08:00:52,680 INFO L794 eck$LassoCheckResult]: Stem: 1219#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(18);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 1214#L-1 havoc main_#res;havoc main_#t~ret11, main_~x~0, main_~result~0;main_~x~0 := 6; 1192#L39 call main_#t~ret11 := fibo1(main_~x~0);< 1193#fibo1ENTRY ~n := #in~n; 1257#L10 assume !(~n < 1); 1206#L12 assume !(1 == ~n); 1159#L15 call #t~ret7 := fibo2(~n - 1);< 1216#fibo2ENTRY ~n := #in~n; 1221#L20 assume !(~n < 1); 1175#L22 assume !(1 == ~n); 1176#L25 call #t~ret9 := fibo1(~n - 1);< 1205#fibo1ENTRY ~n := #in~n; 1182#L10 assume !(~n < 1); 1184#L12 assume !(1 == ~n); 1203#L15 call #t~ret7 := fibo2(~n - 1);< 1259#fibo2ENTRY ~n := #in~n; 1261#L20 assume !(~n < 1); 1262#L22 assume !(1 == ~n); 1183#L25 call #t~ret9 := fibo1(~n - 1);< 1205#fibo1ENTRY ~n := #in~n; 1182#L10 assume !(~n < 1); 1184#L12 assume !(1 == ~n); 1203#L15 call #t~ret7 := fibo2(~n - 1);< 1259#fibo2ENTRY ~n := #in~n; 1261#L20 assume ~n < 1;#res := 0; 1260#fibo2FINAL assume true; 1258#fibo2EXIT >#52#return; 1204#L15-1 call #t~ret8 := fibo2(~n - 2);< 1223#fibo2ENTRY ~n := #in~n; 1317#L20 assume !(~n < 1); 1316#L22 assume !(1 == ~n); 1183#L25 call #t~ret9 := fibo1(~n - 1);< 1205#fibo1ENTRY ~n := #in~n; 1256#L10 assume !(~n < 1); 1263#L12 assume 1 == ~n;#res := 1; 1264#fibo1FINAL assume true; 1251#fibo1EXIT >#48#return; 1208#L25-1 call #t~ret10 := fibo1(~n - 2);< 1213#fibo1ENTRY ~n := #in~n; 1249#L10 assume !(~n < 1); 1247#L12 assume !(1 == ~n); 1212#L15 call #t~ret7 := fibo2(~n - 1);< 1246#fibo2ENTRY ~n := #in~n; 1243#L20 assume ~n < 1;#res := 0; 1244#fibo2FINAL assume true; 1248#fibo2EXIT >#52#return; 1211#L15-1 call #t~ret8 := fibo2(~n - 2);< 1246#fibo2ENTRY ~n := #in~n; 1243#L20 assume !(~n < 1); 1239#L22 assume 1 == ~n;#res := 1; 1240#fibo2FINAL assume true; 1308#fibo2EXIT >#54#return; 1307#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 1319#fibo1FINAL assume true; 1318#fibo1EXIT >#50#return; 1188#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret10;havoc #t~ret9; 1311#fibo2FINAL assume true; 1309#fibo2EXIT >#54#return; 1307#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 1319#fibo1FINAL assume true; 1318#fibo1EXIT >#48#return; 1186#L25-1 call #t~ret10 := fibo1(~n - 2);< 1300#fibo1ENTRY ~n := #in~n; 1298#L10 assume !(~n < 1); 1296#L12 assume !(1 == ~n); 1170#L15 call #t~ret7 := fibo2(~n - 1);< 1215#fibo2ENTRY ~n := #in~n; 1220#L20 assume ~n < 1;#res := 0; 1173#fibo2FINAL assume true; 1310#fibo2EXIT >#52#return; 1172#L15-1 call #t~ret8 := fibo2(~n - 2);< 1215#fibo2ENTRY ~n := #in~n; 1220#L20 assume ~n < 1;#res := 0; 1173#fibo2FINAL assume true; 1310#fibo2EXIT >#54#return; 1307#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 1319#fibo1FINAL assume true; 1318#fibo1EXIT >#50#return; 1188#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret10;havoc #t~ret9; 1311#fibo2FINAL assume true; 1309#fibo2EXIT >#52#return; 1172#L15-1 [2020-10-20 08:00:52,681 INFO L796 eck$LassoCheckResult]: Loop: 1172#L15-1 call #t~ret8 := fibo2(~n - 2);< 1215#fibo2ENTRY ~n := #in~n; 1220#L20 assume !(~n < 1); 1169#L22 assume !(1 == ~n); 1174#L25 call #t~ret9 := fibo1(~n - 1);< 1300#fibo1ENTRY ~n := #in~n; 1298#L10 assume !(~n < 1); 1296#L12 assume !(1 == ~n); 1170#L15 call #t~ret7 := fibo2(~n - 1);< 1215#fibo2ENTRY ~n := #in~n; 1220#L20 assume !(~n < 1); 1169#L22 assume !(1 == ~n); 1174#L25 call #t~ret9 := fibo1(~n - 1);< 1300#fibo1ENTRY ~n := #in~n; 1298#L10 assume !(~n < 1); 1296#L12 assume !(1 == ~n); 1170#L15 call #t~ret7 := fibo2(~n - 1);< 1215#fibo2ENTRY ~n := #in~n; 1220#L20 assume ~n < 1;#res := 0; 1173#fibo2FINAL assume true; 1310#fibo2EXIT >#52#return; 1172#L15-1 call #t~ret8 := fibo2(~n - 2);< 1215#fibo2ENTRY ~n := #in~n; 1220#L20 assume ~n < 1;#res := 0; 1173#fibo2FINAL assume true; 1310#fibo2EXIT >#54#return; 1307#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 1319#fibo1FINAL assume true; 1318#fibo1EXIT >#48#return; 1186#L25-1 call #t~ret10 := fibo1(~n - 2);< 1300#fibo1ENTRY ~n := #in~n; 1298#L10 assume !(~n < 1); 1296#L12 assume !(1 == ~n); 1170#L15 call #t~ret7 := fibo2(~n - 1);< 1215#fibo2ENTRY ~n := #in~n; 1220#L20 assume ~n < 1;#res := 0; 1173#fibo2FINAL assume true; 1310#fibo2EXIT >#52#return; 1172#L15-1 call #t~ret8 := fibo2(~n - 2);< 1215#fibo2ENTRY ~n := #in~n; 1220#L20 assume ~n < 1;#res := 0; 1173#fibo2FINAL assume true; 1310#fibo2EXIT >#54#return; 1307#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 1319#fibo1FINAL assume true; 1318#fibo1EXIT >#50#return; 1188#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret10;havoc #t~ret9; 1311#fibo2FINAL assume true; 1309#fibo2EXIT >#52#return; 1172#L15-1 [2020-10-20 08:00:52,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:52,681 INFO L82 PathProgramCache]: Analyzing trace with hash -1380034771, now seen corresponding path program 1 times [2020-10-20 08:00:52,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:00:52,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477500813] [2020-10-20 08:00:52,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:00:52,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:52,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-20 08:00:52,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:52,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 08:00:52,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:52,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 08:00:52,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:52,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-20 08:00:52,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:52,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 08:00:52,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:52,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-20 08:00:52,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:52,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 08:00:52,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:52,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-20 08:00:52,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:52,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-20 08:00:52,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:52,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 08:00:52,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:52,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-20 08:00:52,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:53,007 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 24 proven. 74 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-10-20 08:00:53,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477500813] [2020-10-20 08:00:53,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483394667] [2020-10-20 08:00:53,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 08:00:53,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:53,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-20 08:00:53,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:53,366 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 17 proven. 91 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2020-10-20 08:00:53,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 08:00:53,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2020-10-20 08:00:53,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407261601] [2020-10-20 08:00:53,369 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-20 08:00:53,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:53,370 INFO L82 PathProgramCache]: Analyzing trace with hash -1411437133, now seen corresponding path program 1 times [2020-10-20 08:00:53,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:00:53,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387573736] [2020-10-20 08:00:53,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:00:53,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:53,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-20 08:00:53,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:53,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 08:00:53,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:53,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 08:00:53,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:53,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-20 08:00:53,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:53,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-20 08:00:53,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:53,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 08:00:53,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:53,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-20 08:00:53,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:53,509 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 13 proven. 15 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-10-20 08:00:53,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387573736] [2020-10-20 08:00:53,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197556385] [2020-10-20 08:00:53,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 08:00:53,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:53,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-20 08:00:53,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:53,655 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 18 proven. 16 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-20 08:00:53,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 08:00:53,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9] total 12 [2020-10-20 08:00:53,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691387234] [2020-10-20 08:00:53,657 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-10-20 08:00:53,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 08:00:53,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-20 08:00:53,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-20 08:00:53,658 INFO L87 Difference]: Start difference. First operand 167 states and 225 transitions. cyclomatic complexity: 63 Second operand 12 states. [2020-10-20 08:00:53,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 08:00:53,984 INFO L93 Difference]: Finished difference Result 223 states and 293 transitions. [2020-10-20 08:00:53,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-20 08:00:53,987 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 223 states and 293 transitions. [2020-10-20 08:00:53,994 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 20 [2020-10-20 08:00:54,006 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 223 states to 200 states and 262 transitions. [2020-10-20 08:00:54,006 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 134 [2020-10-20 08:00:54,010 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 134 [2020-10-20 08:00:54,010 INFO L73 IsDeterministic]: Start isDeterministic. Operand 200 states and 262 transitions. [2020-10-20 08:00:54,010 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 08:00:54,010 INFO L691 BuchiCegarLoop]: Abstraction has 200 states and 262 transitions. [2020-10-20 08:00:54,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states and 262 transitions. [2020-10-20 08:00:54,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 184. [2020-10-20 08:00:54,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-10-20 08:00:54,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 238 transitions. [2020-10-20 08:00:54,040 INFO L714 BuchiCegarLoop]: Abstraction has 184 states and 238 transitions. [2020-10-20 08:00:54,040 INFO L594 BuchiCegarLoop]: Abstraction has 184 states and 238 transitions. [2020-10-20 08:00:54,040 INFO L427 BuchiCegarLoop]: ======== Iteration 5============ [2020-10-20 08:00:54,041 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 184 states and 238 transitions. [2020-10-20 08:00:54,043 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 20 [2020-10-20 08:00:54,044 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 08:00:54,044 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 08:00:54,049 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 08:00:54,049 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [6, 5, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2020-10-20 08:00:54,049 INFO L794 eck$LassoCheckResult]: Stem: 2335#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(18);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 2326#L-1 havoc main_#res;havoc main_#t~ret11, main_~x~0, main_~result~0;main_~x~0 := 6; 2285#L39 call main_#t~ret11 := fibo1(main_~x~0);< 2307#fibo1ENTRY ~n := #in~n; 2284#L10 assume !(~n < 1); 2286#L12 assume !(1 == ~n); 2317#L15 call #t~ret7 := fibo2(~n - 1);< 2334#fibo2ENTRY ~n := #in~n; 2424#L20 assume !(~n < 1); 2421#L22 assume !(1 == ~n); 2316#L25 call #t~ret9 := fibo1(~n - 1);< 2318#fibo1ENTRY ~n := #in~n; 2367#L10 assume !(~n < 1); 2366#L12 assume !(1 == ~n); 2272#L15 call #t~ret7 := fibo2(~n - 1);< 2353#fibo2ENTRY ~n := #in~n; 2374#L20 assume !(~n < 1); 2372#L22 assume !(1 == ~n); 2295#L25 call #t~ret9 := fibo1(~n - 1);< 2318#fibo1ENTRY ~n := #in~n; 2375#L10 assume !(~n < 1); 2386#L12 assume 1 == ~n;#res := 1; 2387#fibo1FINAL assume true; 2448#fibo1EXIT >#48#return; 2328#L25-1 call #t~ret10 := fibo1(~n - 2);< 2327#fibo1ENTRY ~n := #in~n; 2329#L10 assume ~n < 1;#res := 0; 2451#fibo1FINAL assume true; 2450#fibo1EXIT >#50#return; 2271#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret10;havoc #t~ret9; 2274#fibo2FINAL assume true; 2398#fibo2EXIT >#52#return; 2339#L15-1 [2020-10-20 08:00:54,049 INFO L796 eck$LassoCheckResult]: Loop: 2339#L15-1 call #t~ret8 := fibo2(~n - 2);< 2336#fibo2ENTRY ~n := #in~n; 2340#L20 assume !(~n < 1); 2422#L22 assume !(1 == ~n); 2403#L25 call #t~ret9 := fibo1(~n - 1);< 2415#fibo1ENTRY ~n := #in~n; 2426#L10 assume !(~n < 1); 2418#L12 assume !(1 == ~n); 2337#L15 call #t~ret7 := fibo2(~n - 1);< 2336#fibo2ENTRY ~n := #in~n; 2340#L20 assume !(~n < 1); 2422#L22 assume !(1 == ~n); 2403#L25 call #t~ret9 := fibo1(~n - 1);< 2415#fibo1ENTRY ~n := #in~n; 2426#L10 assume !(~n < 1); 2418#L12 assume !(1 == ~n); 2337#L15 call #t~ret7 := fibo2(~n - 1);< 2336#fibo2ENTRY ~n := #in~n; 2340#L20 assume !(~n < 1); 2422#L22 assume 1 == ~n;#res := 1; 2423#fibo2FINAL assume true; 2408#fibo2EXIT >#52#return; 2339#L15-1 call #t~ret8 := fibo2(~n - 2);< 2336#fibo2ENTRY ~n := #in~n; 2340#L20 assume ~n < 1;#res := 0; 2425#fibo2FINAL assume true; 2428#fibo2EXIT >#54#return; 2399#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 2420#fibo1FINAL assume true; 2413#fibo1EXIT >#48#return; 2404#L25-1 call #t~ret10 := fibo1(~n - 2);< 2415#fibo1ENTRY ~n := #in~n; 2426#L10 assume !(~n < 1); 2418#L12 assume !(1 == ~n); 2337#L15 call #t~ret7 := fibo2(~n - 1);< 2336#fibo2ENTRY ~n := #in~n; 2340#L20 assume !(~n < 1); 2422#L22 assume 1 == ~n;#res := 1; 2423#fibo2FINAL assume true; 2408#fibo2EXIT >#52#return; 2339#L15-1 call #t~ret8 := fibo2(~n - 2);< 2336#fibo2ENTRY ~n := #in~n; 2340#L20 assume ~n < 1;#res := 0; 2425#fibo2FINAL assume true; 2428#fibo2EXIT >#54#return; 2399#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 2420#fibo1FINAL assume true; 2413#fibo1EXIT >#50#return; 2409#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret10;havoc #t~ret9; 2406#fibo2FINAL assume true; 2402#fibo2EXIT >#52#return; 2339#L15-1 [2020-10-20 08:00:54,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:54,050 INFO L82 PathProgramCache]: Analyzing trace with hash -658151768, now seen corresponding path program 1 times [2020-10-20 08:00:54,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:00:54,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592607183] [2020-10-20 08:00:54,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:00:54,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:54,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-20 08:00:54,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:54,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 08:00:54,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:54,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-20 08:00:54,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:54,231 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-20 08:00:54,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592607183] [2020-10-20 08:00:54,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741401647] [2020-10-20 08:00:54,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 08:00:54,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:54,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-20 08:00:54,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:54,334 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-20 08:00:54,334 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 08:00:54,334 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2020-10-20 08:00:54,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293450433] [2020-10-20 08:00:54,335 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-20 08:00:54,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:54,335 INFO L82 PathProgramCache]: Analyzing trace with hash -1108085027, now seen corresponding path program 1 times [2020-10-20 08:00:54,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:00:54,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528231867] [2020-10-20 08:00:54,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:00:54,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:54,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-20 08:00:54,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:54,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 08:00:54,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:54,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 08:00:54,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:54,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-20 08:00:54,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:54,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-20 08:00:54,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:54,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 08:00:54,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:54,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-20 08:00:54,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:54,497 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2020-10-20 08:00:54,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528231867] [2020-10-20 08:00:54,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862879317] [2020-10-20 08:00:54,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 08:00:54,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:54,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-20 08:00:54,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:54,619 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 27 proven. 20 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-20 08:00:54,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 08:00:54,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 14 [2020-10-20 08:00:54,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912335081] [2020-10-20 08:00:54,621 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-10-20 08:00:54,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 08:00:54,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-20 08:00:54,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2020-10-20 08:00:54,621 INFO L87 Difference]: Start difference. First operand 184 states and 238 transitions. cyclomatic complexity: 59 Second operand 15 states. [2020-10-20 08:00:54,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 08:00:54,939 INFO L93 Difference]: Finished difference Result 206 states and 270 transitions. [2020-10-20 08:00:54,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-20 08:00:54,940 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 206 states and 270 transitions. [2020-10-20 08:00:54,944 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 20 [2020-10-20 08:00:54,948 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 206 states to 203 states and 266 transitions. [2020-10-20 08:00:54,948 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 133 [2020-10-20 08:00:54,949 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 133 [2020-10-20 08:00:54,949 INFO L73 IsDeterministic]: Start isDeterministic. Operand 203 states and 266 transitions. [2020-10-20 08:00:54,949 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 08:00:54,949 INFO L691 BuchiCegarLoop]: Abstraction has 203 states and 266 transitions. [2020-10-20 08:00:54,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states and 266 transitions. [2020-10-20 08:00:54,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 194. [2020-10-20 08:00:54,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-10-20 08:00:54,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 251 transitions. [2020-10-20 08:00:54,963 INFO L714 BuchiCegarLoop]: Abstraction has 194 states and 251 transitions. [2020-10-20 08:00:54,963 INFO L594 BuchiCegarLoop]: Abstraction has 194 states and 251 transitions. [2020-10-20 08:00:54,963 INFO L427 BuchiCegarLoop]: ======== Iteration 6============ [2020-10-20 08:00:54,963 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 194 states and 251 transitions. [2020-10-20 08:00:54,965 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 20 [2020-10-20 08:00:54,965 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 08:00:54,966 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 08:00:54,967 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [5, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 08:00:54,967 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [6, 5, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2020-10-20 08:00:54,968 INFO L794 eck$LassoCheckResult]: Stem: 3123#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(18);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 3122#L-1 havoc main_#res;havoc main_#t~ret11, main_~x~0, main_~result~0;main_~x~0 := 6; 3080#L39 call main_#t~ret11 := fibo1(main_~x~0);< 3097#fibo1ENTRY ~n := #in~n; 3079#L10 assume !(~n < 1); 3081#L12 assume !(1 == ~n); 3090#L15 call #t~ret7 := fibo2(~n - 1);< 3130#fibo2ENTRY ~n := #in~n; 3133#L20 assume !(~n < 1); 3089#L22 assume !(1 == ~n); 3091#L25 call #t~ret9 := fibo1(~n - 1);< 3115#fibo1ENTRY ~n := #in~n; 3192#L10 assume !(~n < 1); 3191#L12 assume !(1 == ~n); 3095#L15 call #t~ret7 := fibo2(~n - 1);< 3149#fibo2ENTRY ~n := #in~n; 3180#L20 assume !(~n < 1); 3178#L22 assume !(1 == ~n); 3136#L25 call #t~ret9 := fibo1(~n - 1);< 3163#fibo1ENTRY ~n := #in~n; 3166#L10 assume !(~n < 1); 3165#L12 assume !(1 == ~n); 3094#L15 call #t~ret7 := fibo2(~n - 1);< 3149#fibo2ENTRY ~n := #in~n; 3180#L20 assume !(~n < 1); 3178#L22 assume !(1 == ~n); 3136#L25 call #t~ret9 := fibo1(~n - 1);< 3163#fibo1ENTRY ~n := #in~n; 3168#L10 assume !(~n < 1); 3186#L12 assume 1 == ~n;#res := 1; 3187#fibo1FINAL assume true; 3247#fibo1EXIT >#48#return; 3245#L25-1 call #t~ret10 := fibo1(~n - 2);< 3246#fibo1ENTRY ~n := #in~n; 3249#L10 assume ~n < 1;#res := 0; 3248#fibo1FINAL assume true; 3244#fibo1EXIT >#50#return; 3243#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret10;havoc #t~ret9; 3242#fibo2FINAL assume true; 3226#fibo2EXIT >#52#return; 3113#L15-1 [2020-10-20 08:00:54,968 INFO L796 eck$LassoCheckResult]: Loop: 3113#L15-1 call #t~ret8 := fibo2(~n - 2);< 3129#fibo2ENTRY ~n := #in~n; 3138#L20 assume !(~n < 1); 3140#L22 assume !(1 == ~n); 3109#L25 call #t~ret9 := fibo1(~n - 1);< 3114#fibo1ENTRY ~n := #in~n; 3196#L10 assume !(~n < 1); 3194#L12 assume !(1 == ~n); 3111#L15 call #t~ret7 := fibo2(~n - 1);< 3129#fibo2ENTRY ~n := #in~n; 3138#L20 assume !(~n < 1); 3140#L22 assume !(1 == ~n); 3109#L25 call #t~ret9 := fibo1(~n - 1);< 3114#fibo1ENTRY ~n := #in~n; 3196#L10 assume !(~n < 1); 3194#L12 assume !(1 == ~n); 3111#L15 call #t~ret7 := fibo2(~n - 1);< 3129#fibo2ENTRY ~n := #in~n; 3138#L20 assume !(~n < 1); 3140#L22 assume 1 == ~n;#res := 1; 3218#fibo2FINAL assume true; 3231#fibo2EXIT >#52#return; 3113#L15-1 call #t~ret8 := fibo2(~n - 2);< 3129#fibo2ENTRY ~n := #in~n; 3138#L20 assume ~n < 1;#res := 0; 3139#fibo2FINAL assume true; 3227#fibo2EXIT >#54#return; 3225#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 3224#fibo1FINAL assume true; 3220#fibo1EXIT >#48#return; 3127#L25-1 call #t~ret10 := fibo1(~n - 2);< 3114#fibo1ENTRY ~n := #in~n; 3196#L10 assume !(~n < 1); 3194#L12 assume !(1 == ~n); 3111#L15 call #t~ret7 := fibo2(~n - 1);< 3129#fibo2ENTRY ~n := #in~n; 3138#L20 assume !(~n < 1); 3140#L22 assume 1 == ~n;#res := 1; 3218#fibo2FINAL assume true; 3231#fibo2EXIT >#52#return; 3113#L15-1 call #t~ret8 := fibo2(~n - 2);< 3129#fibo2ENTRY ~n := #in~n; 3138#L20 assume ~n < 1;#res := 0; 3139#fibo2FINAL assume true; 3227#fibo2EXIT >#54#return; 3225#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 3224#fibo1FINAL assume true; 3220#fibo1EXIT >#50#return; 3221#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret10;havoc #t~ret9; 3229#fibo2FINAL assume true; 3228#fibo2EXIT >#52#return; 3113#L15-1 [2020-10-20 08:00:54,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:54,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1100171425, now seen corresponding path program 2 times [2020-10-20 08:00:54,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:00:54,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020274376] [2020-10-20 08:00:54,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:00:54,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:55,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-20 08:00:55,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:55,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 08:00:55,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:55,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-20 08:00:55,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:55,139 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 16 proven. 23 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-20 08:00:55,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020274376] [2020-10-20 08:00:55,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546876906] [2020-10-20 08:00:55,142 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 08:00:55,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-20 08:00:55,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 08:00:55,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-20 08:00:55,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:55,268 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 16 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-20 08:00:55,269 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 08:00:55,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 18 [2020-10-20 08:00:55,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529735032] [2020-10-20 08:00:55,270 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-20 08:00:55,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:55,270 INFO L82 PathProgramCache]: Analyzing trace with hash -1108085027, now seen corresponding path program 2 times [2020-10-20 08:00:55,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:00:55,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138529341] [2020-10-20 08:00:55,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:00:55,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:55,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-20 08:00:55,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:55,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 08:00:55,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:55,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 08:00:55,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:55,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-20 08:00:55,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:55,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-20 08:00:55,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:55,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 08:00:55,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:55,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-20 08:00:55,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:55,382 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2020-10-20 08:00:55,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138529341] [2020-10-20 08:00:55,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433909874] [2020-10-20 08:00:55,383 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 08:00:55,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-20 08:00:55,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 08:00:55,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-20 08:00:55,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:55,513 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 27 proven. 20 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-20 08:00:55,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 08:00:55,514 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 14 [2020-10-20 08:00:55,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830277830] [2020-10-20 08:00:55,514 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-10-20 08:00:55,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 08:00:55,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-20 08:00:55,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2020-10-20 08:00:55,515 INFO L87 Difference]: Start difference. First operand 194 states and 251 transitions. cyclomatic complexity: 62 Second operand 19 states. [2020-10-20 08:00:56,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 08:00:56,112 INFO L93 Difference]: Finished difference Result 246 states and 296 transitions. [2020-10-20 08:00:56,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-20 08:00:56,113 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 246 states and 296 transitions. [2020-10-20 08:00:56,117 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 24 [2020-10-20 08:00:56,120 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 246 states to 163 states and 194 transitions. [2020-10-20 08:00:56,120 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 114 [2020-10-20 08:00:56,120 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 114 [2020-10-20 08:00:56,121 INFO L73 IsDeterministic]: Start isDeterministic. Operand 163 states and 194 transitions. [2020-10-20 08:00:56,122 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 08:00:56,122 INFO L691 BuchiCegarLoop]: Abstraction has 163 states and 194 transitions. [2020-10-20 08:00:56,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states and 194 transitions. [2020-10-20 08:00:56,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 157. [2020-10-20 08:00:56,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-20 08:00:56,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 188 transitions. [2020-10-20 08:00:56,130 INFO L714 BuchiCegarLoop]: Abstraction has 157 states and 188 transitions. [2020-10-20 08:00:56,130 INFO L594 BuchiCegarLoop]: Abstraction has 157 states and 188 transitions. [2020-10-20 08:00:56,130 INFO L427 BuchiCegarLoop]: ======== Iteration 7============ [2020-10-20 08:00:56,130 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 157 states and 188 transitions. [2020-10-20 08:00:56,132 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 22 [2020-10-20 08:00:56,132 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 08:00:56,132 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 08:00:56,133 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 08:00:56,133 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 08:00:56,134 INFO L794 eck$LassoCheckResult]: Stem: 4014#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(18);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 4010#L-1 havoc main_#res;havoc main_#t~ret11, main_~x~0, main_~result~0;main_~x~0 := 6; 3996#L39 call main_#t~ret11 := fibo1(main_~x~0);< 3997#fibo1ENTRY ~n := #in~n; 4046#L10 assume !(~n < 1); 4007#L12 assume !(1 == ~n); 3990#L15 call #t~ret7 := fibo2(~n - 1);< 4012#fibo2ENTRY ~n := #in~n; 4016#L20 assume !(~n < 1); 3989#L22 assume !(1 == ~n); 3975#L25 call #t~ret9 := fibo1(~n - 1);< 4005#fibo1ENTRY ~n := #in~n; 3974#L10 assume !(~n < 1); 3976#L12 assume !(1 == ~n); 4021#L15 call #t~ret7 := fibo2(~n - 1);< 4032#fibo2ENTRY ~n := #in~n; 4038#L20 assume !(~n < 1); 4034#L22 assume !(1 == ~n); 4018#L25 call #t~ret9 := fibo1(~n - 1);< 4041#fibo1ENTRY ~n := #in~n; 4042#L10 assume !(~n < 1); 4062#L12 assume !(1 == ~n); 4058#L15 call #t~ret7 := fibo2(~n - 1);< 4059#fibo2ENTRY ~n := #in~n; 4064#L20 assume !(~n < 1); 4063#L22 assume 1 == ~n;#res := 1; 4061#fibo2FINAL assume true; 4057#fibo2EXIT >#52#return; 4054#L15-1 call #t~ret8 := fibo2(~n - 2);< 4055#fibo2ENTRY ~n := #in~n; 4060#L20 assume ~n < 1;#res := 0; 4056#fibo2FINAL assume true; 4053#fibo2EXIT >#54#return; 4052#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 4048#fibo1FINAL assume true; 4045#fibo1EXIT >#48#return; 3971#L25-1 call #t~ret10 := fibo1(~n - 2);< 4043#fibo1ENTRY ~n := #in~n; 3970#L10 assume ~n < 1;#res := 0; 3972#fibo1FINAL assume true; 4006#fibo1EXIT >#50#return; 4071#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret10;havoc #t~ret9; 4119#fibo2FINAL assume true; 4110#fibo2EXIT >#52#return; 3966#L15-1 call #t~ret8 := fibo2(~n - 2);< 4083#fibo2ENTRY [2020-10-20 08:00:56,134 INFO L796 eck$LassoCheckResult]: Loop: 4083#fibo2ENTRY ~n := #in~n; 4084#L20 assume !(~n < 1); 4077#L22 assume !(1 == ~n); 4070#L25 call #t~ret9 := fibo1(~n - 1);< 4075#fibo1ENTRY ~n := #in~n; 4103#L10 assume !(~n < 1); 4101#L12 assume !(1 == ~n); 3965#L15 call #t~ret7 := fibo2(~n - 1);< 4083#fibo2ENTRY [2020-10-20 08:00:56,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:56,135 INFO L82 PathProgramCache]: Analyzing trace with hash 1560322136, now seen corresponding path program 1 times [2020-10-20 08:00:56,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:00:56,135 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520298395] [2020-10-20 08:00:56,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:00:56,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:56,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-20 08:00:56,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:56,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 08:00:56,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:56,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 08:00:56,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:56,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-20 08:00:56,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:56,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-20 08:00:56,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:56,295 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 5 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-20 08:00:56,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520298395] [2020-10-20 08:00:56,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387621004] [2020-10-20 08:00:56,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 08:00:56,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:56,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-20 08:00:56,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:56,407 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-20 08:00:56,408 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 08:00:56,408 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 17 [2020-10-20 08:00:56,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561034584] [2020-10-20 08:00:56,409 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-20 08:00:56,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:56,409 INFO L82 PathProgramCache]: Analyzing trace with hash 996300776, now seen corresponding path program 2 times [2020-10-20 08:00:56,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:00:56,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395259487] [2020-10-20 08:00:56,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:00:56,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:00:56,414 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:00:56,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:00:56,416 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:00:56,417 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 08:00:56,528 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 08:00:56,528 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 08:00:56,528 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 08:00:56,529 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 08:00:56,529 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-20 08:00:56,529 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:56,529 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 08:00:56,529 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 08:00:56,529 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_6-1.c_Iteration7_Loop [2020-10-20 08:00:56,529 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 08:00:56,529 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 08:00:56,531 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:56,539 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:56,562 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:56,565 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:56,568 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:56,571 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:56,574 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:56,577 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:56,580 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:56,583 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:56,643 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 08:00:56,643 INFO L404 LassoAnalysis]: Checking for nontermination... 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) [2020-10-20 08:00:56,657 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:00:56,657 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 41 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 42 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:00:56,724 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-20 08:00:56,724 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 42 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:56,859 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-20 08:00:56,862 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 08:00:56,862 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 08:00:56,862 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 08:00:56,862 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 08:00:56,862 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-20 08:00:56,863 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:56,863 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 08:00:56,863 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 08:00:56,863 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_6-1.c_Iteration7_Loop [2020-10-20 08:00:56,863 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 08:00:56,863 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 08:00:56,865 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:56,869 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:56,872 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:56,881 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:56,886 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:56,888 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:56,891 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:56,894 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:56,896 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:56,898 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:56,952 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 08:00:56,952 INFO L489 LassoAnalysis]: Using template 'affine'. 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) [2020-10-20 08:00:56,960 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 08:00:56,962 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:00:56,962 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:00:56,962 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:00:56,963 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:00:56,963 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:00:56,963 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:00:56,964 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 43 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:56,967 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:00:57,007 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 [2020-10-20 08:00:57,009 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:00:57,009 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:00:57,010 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:00:57,010 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:00:57,010 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:00:57,011 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:00:57,011 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 44 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:57,013 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 45 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:00:57,053 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 [2020-10-20 08:00:57,055 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:00:57,056 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:00:57,056 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:00:57,056 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:00:57,056 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:00:57,057 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:00:57,057 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 45 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:57,060 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-20 08:00:57,064 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2020-10-20 08:00:57,064 INFO L444 ModelExtractionUtils]: 1 out of 3 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 46 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:00:57,068 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-20 08:00:57,068 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-20 08:00:57,069 INFO L510 LassoAnalysis]: Proved termination. [2020-10-20 08:00:57,069 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo2_#in~n) = 1*fibo2_#in~n Supporting invariants [] Waiting until toolchain timeout for monitored process 46 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:57,108 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-20 08:00:57,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:57,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:57,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-20 08:00:57,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:57,202 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:00:57,207 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:00:57,210 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:00:57,214 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:00:57,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:57,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-20 08:00:57,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:57,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 08:00:57,320 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 [2020-10-20 08:00:57,320 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 157 states and 188 transitions. cyclomatic complexity: 35 Second operand 7 states. [2020-10-20 08:00:57,466 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 157 states and 188 transitions. cyclomatic complexity: 35. Second operand 7 states. Result 225 states and 264 transitions. Complement of second has 16 states. [2020-10-20 08:00:57,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2020-10-20 08:00:57,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-20 08:00:57,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 26 transitions. [2020-10-20 08:00:57,469 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 26 transitions. Stem has 45 letters. Loop has 8 letters. [2020-10-20 08:00:57,469 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:00:57,470 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-20 08:00:57,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:57,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:57,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-20 08:00:57,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:57,578 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:00:57,583 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:00:57,594 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:00:57,597 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:00:57,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:57,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-20 08:00:57,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:57,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 08:00:57,675 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 5 loop predicates [2020-10-20 08:00:57,675 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 157 states and 188 transitions. cyclomatic complexity: 35 Second operand 7 states. [2020-10-20 08:00:57,818 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 157 states and 188 transitions. cyclomatic complexity: 35. Second operand 7 states. Result 225 states and 264 transitions. Complement of second has 16 states. [2020-10-20 08:00:57,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2020-10-20 08:00:57,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-20 08:00:57,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 26 transitions. [2020-10-20 08:00:57,820 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 26 transitions. Stem has 45 letters. Loop has 8 letters. [2020-10-20 08:00:57,820 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:00:57,820 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-20 08:00:57,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:57,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:57,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-20 08:00:57,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:57,919 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:00:57,922 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:00:57,928 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:00:57,933 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:00:57,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:57,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-20 08:00:57,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:58,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 08:00:58,003 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 5 loop predicates [2020-10-20 08:00:58,004 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 157 states and 188 transitions. cyclomatic complexity: 35 Second operand 7 states. [2020-10-20 08:00:58,221 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 157 states and 188 transitions. cyclomatic complexity: 35. Second operand 7 states. Result 314 states and 366 transitions. Complement of second has 23 states. [2020-10-20 08:00:58,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 8 states 2 stem states 5 non-accepting loop states 1 accepting loop states [2020-10-20 08:00:58,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-20 08:00:58,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 43 transitions. [2020-10-20 08:00:58,228 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 43 transitions. Stem has 45 letters. Loop has 8 letters. [2020-10-20 08:00:58,229 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:00:58,229 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 43 transitions. Stem has 53 letters. Loop has 8 letters. [2020-10-20 08:00:58,230 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:00:58,230 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 43 transitions. Stem has 45 letters. Loop has 16 letters. [2020-10-20 08:00:58,230 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:00:58,231 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 314 states and 366 transitions. [2020-10-20 08:00:58,235 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 46 [2020-10-20 08:00:58,239 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 314 states to 234 states and 279 transitions. [2020-10-20 08:00:58,240 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 132 [2020-10-20 08:00:58,240 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 141 [2020-10-20 08:00:58,240 INFO L73 IsDeterministic]: Start isDeterministic. Operand 234 states and 279 transitions. [2020-10-20 08:00:58,241 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 08:00:58,241 INFO L691 BuchiCegarLoop]: Abstraction has 234 states and 279 transitions. [2020-10-20 08:00:58,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states and 279 transitions. [2020-10-20 08:00:58,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 215. [2020-10-20 08:00:58,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2020-10-20 08:00:58,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 255 transitions. [2020-10-20 08:00:58,250 INFO L714 BuchiCegarLoop]: Abstraction has 215 states and 255 transitions. [2020-10-20 08:00:58,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 08:00:58,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-20 08:00:58,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2020-10-20 08:00:58,251 INFO L87 Difference]: Start difference. First operand 215 states and 255 transitions. Second operand 17 states. [2020-10-20 08:00:58,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 08:00:58,637 INFO L93 Difference]: Finished difference Result 220 states and 258 transitions. [2020-10-20 08:00:58,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-20 08:00:58,638 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 220 states and 258 transitions. [2020-10-20 08:00:58,641 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 40 [2020-10-20 08:00:58,644 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 220 states to 218 states and 256 transitions. [2020-10-20 08:00:58,644 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 134 [2020-10-20 08:00:58,645 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 134 [2020-10-20 08:00:58,645 INFO L73 IsDeterministic]: Start isDeterministic. Operand 218 states and 256 transitions. [2020-10-20 08:00:58,645 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 08:00:58,645 INFO L691 BuchiCegarLoop]: Abstraction has 218 states and 256 transitions. [2020-10-20 08:00:58,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states and 256 transitions. [2020-10-20 08:00:58,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 210. [2020-10-20 08:00:58,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2020-10-20 08:00:58,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 248 transitions. [2020-10-20 08:00:58,654 INFO L714 BuchiCegarLoop]: Abstraction has 210 states and 248 transitions. [2020-10-20 08:00:58,654 INFO L594 BuchiCegarLoop]: Abstraction has 210 states and 248 transitions. [2020-10-20 08:00:58,654 INFO L427 BuchiCegarLoop]: ======== Iteration 8============ [2020-10-20 08:00:58,654 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 210 states and 248 transitions. [2020-10-20 08:00:58,656 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 40 [2020-10-20 08:00:58,656 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 08:00:58,657 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 08:00:58,658 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 08:00:58,658 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 08:00:58,658 INFO L794 eck$LassoCheckResult]: Stem: 6182#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(18);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 6181#L-1 havoc main_#res;havoc main_#t~ret11, main_~x~0, main_~result~0;main_~x~0 := 6; 6152#L39 call main_#t~ret11 := fibo1(main_~x~0);< 6153#fibo1ENTRY ~n := #in~n; 6262#L10 assume !(~n < 1); 6261#L12 assume !(1 == ~n); 6257#L15 call #t~ret7 := fibo2(~n - 1);< 6260#fibo2ENTRY ~n := #in~n; 6259#L20 assume !(~n < 1); 6258#L22 assume !(1 == ~n); 6250#L25 call #t~ret9 := fibo1(~n - 1);< 6256#fibo1ENTRY ~n := #in~n; 6254#L10 assume !(~n < 1); 6252#L12 assume !(1 == ~n); 6129#L15 call #t~ret7 := fibo2(~n - 1);< 6209#fibo2ENTRY ~n := #in~n; 6248#L20 assume !(~n < 1); 6243#L22 assume !(1 == ~n); 6196#L25 call #t~ret9 := fibo1(~n - 1);< 6220#fibo1ENTRY ~n := #in~n; 6236#L10 assume !(~n < 1); 6235#L12 assume !(1 == ~n); 6232#L15 call #t~ret7 := fibo2(~n - 1);< 6233#fibo2ENTRY ~n := #in~n; 6240#L20 assume !(~n < 1); 6239#L22 assume 1 == ~n;#res := 1; 6238#fibo2FINAL assume true; 6231#fibo2EXIT >#52#return; 6228#L15-1 call #t~ret8 := fibo2(~n - 2);< 6229#fibo2ENTRY ~n := #in~n; 6234#L20 assume ~n < 1;#res := 0; 6230#fibo2FINAL assume true; 6227#fibo2EXIT >#54#return; 6226#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 6225#fibo1FINAL assume true; 6219#fibo1EXIT >#48#return; 6211#L25-1 call #t~ret10 := fibo1(~n - 2);< 6180#fibo1ENTRY ~n := #in~n; 6215#L10 assume !(~n < 1); 6213#L12 assume !(1 == ~n); 6166#L15 call #t~ret7 := fibo2(~n - 1);< 6210#fibo2ENTRY ~n := #in~n; 6207#L20 assume !(~n < 1); 6203#L22 assume 1 == ~n;#res := 1; 6204#fibo2FINAL assume true; 6291#fibo2EXIT >#52#return; 6141#L15-1 [2020-10-20 08:00:58,659 INFO L796 eck$LassoCheckResult]: Loop: 6141#L15-1 call #t~ret8 := fibo2(~n - 2);< 6284#fibo2ENTRY ~n := #in~n; 6286#L20 assume !(~n < 1); 6279#L22 assume !(1 == ~n); 6138#L25 call #t~ret9 := fibo1(~n - 1);< 6184#fibo1ENTRY ~n := #in~n; 6137#L10 assume !(~n < 1); 6139#L12 assume !(1 == ~n); 6270#L15 call #t~ret7 := fibo2(~n - 1);< 6186#fibo2ENTRY ~n := #in~n; 6293#L20 assume !(~n < 1); 6302#L22 assume 1 == ~n;#res := 1; 6301#fibo2FINAL assume true; 6290#fibo2EXIT >#52#return; 6141#L15-1 [2020-10-20 08:00:58,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:58,659 INFO L82 PathProgramCache]: Analyzing trace with hash -663651953, now seen corresponding path program 1 times [2020-10-20 08:00:58,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:00:58,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621087983] [2020-10-20 08:00:58,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:00:58,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:58,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-20 08:00:58,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:58,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 08:00:58,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:58,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-20 08:00:58,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:58,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-20 08:00:58,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:58,783 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 20 proven. 24 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-10-20 08:00:58,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621087983] [2020-10-20 08:00:58,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384333193] [2020-10-20 08:00:58,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 08:00:58,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:58,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-20 08:00:58,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:58,860 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 27 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-20 08:00:58,861 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 08:00:58,861 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2020-10-20 08:00:58,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411820685] [2020-10-20 08:00:58,862 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-20 08:00:58,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:58,862 INFO L82 PathProgramCache]: Analyzing trace with hash -815837104, now seen corresponding path program 1 times [2020-10-20 08:00:58,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:00:58,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306088234] [2020-10-20 08:00:58,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:00:58,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:00:58,866 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:00:58,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:00:58,868 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:00:58,870 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 08:00:59,029 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 08:00:59,029 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 08:00:59,029 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 08:00:59,029 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 08:00:59,030 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-20 08:00:59,030 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:59,030 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 08:00:59,030 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 08:00:59,030 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_6-1.c_Iteration8_Loop [2020-10-20 08:00:59,030 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 08:00:59,031 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 08:00:59,031 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:59,035 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:59,036 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:59,039 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:59,041 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:59,043 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:59,048 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:59,055 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:59,057 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:59,112 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 08:00:59,112 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:59,117 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:00:59,117 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:00:59,121 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:00:59,121 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#t~ret8=0} Honda state: {fibo1_#t~ret8=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:59,147 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:00:59,147 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:00:59,150 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:00:59,150 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#res=0} Honda state: {fibo2_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:59,174 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:00:59,175 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:00:59,178 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:00:59,178 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_~n=0} Honda state: {fibo2_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] 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 [2020-10-20 08:00:59,215 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:00:59,215 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:00:59,218 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:00:59,218 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#res=0} Honda state: {fibo1_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] 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 [2020-10-20 08:00:59,241 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:00:59,241 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:00:59,244 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:00:59,244 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#t~ret10=0} Honda state: {fibo2_#t~ret10=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:59,268 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:00:59,268 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:00:59,271 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:00:59,271 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#t~ret9=0} Honda state: {fibo2_#t~ret9=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:59,293 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:00:59,294 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:00:59,321 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-20 08:00:59,321 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 55 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:00,217 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-20 08:01:00,219 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 08:01:00,219 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 08:01:00,219 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 08:01:00,219 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 08:01:00,220 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-20 08:01:00,220 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:00,220 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 08:01:00,220 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 08:01:00,220 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_6-1.c_Iteration8_Loop [2020-10-20 08:01:00,220 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 08:01:00,220 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 08:01:00,221 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:00,223 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:00,227 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:00,228 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:00,231 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:00,233 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:00,236 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:00,238 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:00,246 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:00,301 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 08:01:00,304 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:00,311 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 08:01:00,312 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:00,312 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:00,312 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:00,312 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:00,313 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:00,313 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:00,313 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:00,314 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:00,336 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 08:01:00,337 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:00,337 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:00,337 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:00,337 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:00,337 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:00,338 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:00,338 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:00,339 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:00,363 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 08:01:00,364 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:00,364 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:00,364 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:00,364 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:00,364 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:00,365 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:00,365 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:00,366 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 [2020-10-20 08:01:00,389 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 08:01:00,390 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:00,390 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:00,390 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:00,390 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:00,390 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:00,391 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:00,391 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:00,392 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 [2020-10-20 08:01:00,415 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 08:01:00,416 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:00,416 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:00,416 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:00,416 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:00,416 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:00,417 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:00,417 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:00,418 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 [2020-10-20 08:01:00,450 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 08:01:00,451 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:00,451 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:00,452 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:00,452 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:00,452 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:00,452 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:00,452 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:00,453 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 62 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:00,476 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 08:01:00,477 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:00,477 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:00,477 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:00,477 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:00,477 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:00,478 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:00,478 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:00,479 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 63 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:01:00,502 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 Waiting until toolchain timeout for monitored process 63 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:00,503 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:00,503 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:00,504 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:00,504 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:00,504 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:00,505 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:00,505 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:00,508 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-20 08:01:00,512 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-20 08:01:00,512 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 64 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:00,514 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-20 08:01:00,514 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-20 08:01:00,514 INFO L510 LassoAnalysis]: Proved termination. [2020-10-20 08:01:00,515 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo1_~n) = 1*fibo1_~n Supporting invariants [] [2020-10-20 08:01:00,534 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-20 08:01:00,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:00,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:00,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-20 08:01:00,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:00,624 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:00,627 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:00,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:00,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-20 08:01:00,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:00,748 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 08:01:00,748 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 8 loop predicates [2020-10-20 08:01:00,749 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 210 states and 248 transitions. cyclomatic complexity: 43 Second operand 10 states. [2020-10-20 08:01:01,163 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 210 states and 248 transitions. cyclomatic complexity: 43. Second operand 10 states. Result 608 states and 688 transitions. Complement of second has 40 states. [2020-10-20 08:01:01,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 12 states 2 stem states 9 non-accepting loop states 1 accepting loop states [2020-10-20 08:01:01,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-10-20 08:01:01,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 54 transitions. [2020-10-20 08:01:01,165 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 54 transitions. Stem has 46 letters. Loop has 14 letters. [2020-10-20 08:01:01,165 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:01,165 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-20 08:01:01,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:01,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:01,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-20 08:01:01,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:01,253 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:01,256 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:01,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:01,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-20 08:01:01,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:01,369 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 08:01:01,369 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 8 loop predicates [2020-10-20 08:01:01,370 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 210 states and 248 transitions. cyclomatic complexity: 43 Second operand 10 states. [2020-10-20 08:01:01,648 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 210 states and 248 transitions. cyclomatic complexity: 43. Second operand 10 states. Result 260 states and 302 transitions. Complement of second has 26 states. [2020-10-20 08:01:01,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 9 states 2 stem states 6 non-accepting loop states 1 accepting loop states [2020-10-20 08:01:01,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-10-20 08:01:01,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 31 transitions. [2020-10-20 08:01:01,650 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 31 transitions. Stem has 46 letters. Loop has 14 letters. [2020-10-20 08:01:01,651 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:01,651 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-20 08:01:01,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:01,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:01,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-20 08:01:01,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:01,750 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:01,756 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:01,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:01,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-20 08:01:01,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:01,895 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 08:01:01,895 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 8 loop predicates [2020-10-20 08:01:01,895 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 210 states and 248 transitions. cyclomatic complexity: 43 Second operand 10 states. [2020-10-20 08:01:02,373 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 210 states and 248 transitions. cyclomatic complexity: 43. Second operand 10 states. Result 1187 states and 1346 transitions. Complement of second has 102 states. [2020-10-20 08:01:02,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 12 states 2 stem states 9 non-accepting loop states 1 accepting loop states [2020-10-20 08:01:02,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-10-20 08:01:02,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 71 transitions. [2020-10-20 08:01:02,375 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 71 transitions. Stem has 46 letters. Loop has 14 letters. [2020-10-20 08:01:02,377 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:02,377 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 71 transitions. Stem has 60 letters. Loop has 14 letters. [2020-10-20 08:01:02,380 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:02,380 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 71 transitions. Stem has 46 letters. Loop has 28 letters. [2020-10-20 08:01:02,385 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:02,386 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1187 states and 1346 transitions. [2020-10-20 08:01:02,402 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 124 [2020-10-20 08:01:02,410 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1187 states to 613 states and 697 transitions. [2020-10-20 08:01:02,411 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 287 [2020-10-20 08:01:02,412 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 313 [2020-10-20 08:01:02,412 INFO L73 IsDeterministic]: Start isDeterministic. Operand 613 states and 697 transitions. [2020-10-20 08:01:02,412 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 08:01:02,412 INFO L691 BuchiCegarLoop]: Abstraction has 613 states and 697 transitions. [2020-10-20 08:01:02,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states and 697 transitions. [2020-10-20 08:01:02,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 547. [2020-10-20 08:01:02,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 547 states. [2020-10-20 08:01:02,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 618 transitions. [2020-10-20 08:01:02,434 INFO L714 BuchiCegarLoop]: Abstraction has 547 states and 618 transitions. [2020-10-20 08:01:02,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 08:01:02,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-20 08:01:02,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2020-10-20 08:01:02,436 INFO L87 Difference]: Start difference. First operand 547 states and 618 transitions. Second operand 16 states. [2020-10-20 08:01:02,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 08:01:02,751 INFO L93 Difference]: Finished difference Result 373 states and 416 transitions. [2020-10-20 08:01:02,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-20 08:01:02,752 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 373 states and 416 transitions. [2020-10-20 08:01:02,757 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 28 [2020-10-20 08:01:02,760 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 373 states to 258 states and 292 transitions. [2020-10-20 08:01:02,761 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 149 [2020-10-20 08:01:02,761 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 165 [2020-10-20 08:01:02,762 INFO L73 IsDeterministic]: Start isDeterministic. Operand 258 states and 292 transitions. [2020-10-20 08:01:02,762 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 08:01:02,762 INFO L691 BuchiCegarLoop]: Abstraction has 258 states and 292 transitions. [2020-10-20 08:01:02,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states and 292 transitions. [2020-10-20 08:01:02,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 255. [2020-10-20 08:01:02,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255 states. [2020-10-20 08:01:02,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 286 transitions. [2020-10-20 08:01:02,770 INFO L714 BuchiCegarLoop]: Abstraction has 255 states and 286 transitions. [2020-10-20 08:01:02,770 INFO L594 BuchiCegarLoop]: Abstraction has 255 states and 286 transitions. [2020-10-20 08:01:02,770 INFO L427 BuchiCegarLoop]: ======== Iteration 9============ [2020-10-20 08:01:02,771 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 255 states and 286 transitions. [2020-10-20 08:01:02,773 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 28 [2020-10-20 08:01:02,773 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 08:01:02,773 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 08:01:02,774 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 08:01:02,774 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 08:01:02,775 INFO L794 eck$LassoCheckResult]: Stem: 10359#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(18);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 10358#L-1 havoc main_#res;havoc main_#t~ret11, main_~x~0, main_~result~0;main_~x~0 := 6; 10333#L39 call main_#t~ret11 := fibo1(main_~x~0);< 10334#fibo1ENTRY ~n := #in~n; 10462#L10 assume !(~n < 1); 10461#L12 assume !(1 == ~n); 10443#L15 call #t~ret7 := fibo2(~n - 1);< 10460#fibo2ENTRY ~n := #in~n; 10459#L20 assume !(~n < 1); 10458#L22 assume !(1 == ~n); 10454#L25 call #t~ret9 := fibo1(~n - 1);< 10457#fibo1ENTRY ~n := #in~n; 10456#L10 assume !(~n < 1); 10455#L12 assume !(1 == ~n); 10450#L15 call #t~ret7 := fibo2(~n - 1);< 10453#fibo2ENTRY ~n := #in~n; 10452#L20 assume !(~n < 1); 10451#L22 assume !(1 == ~n); 10362#L25 call #t~ret9 := fibo1(~n - 1);< 10449#fibo1ENTRY ~n := #in~n; 10448#L10 assume !(~n < 1); 10447#L12 assume !(1 == ~n); 10361#L15 call #t~ret7 := fibo2(~n - 1);< 10363#fibo2ENTRY ~n := #in~n; 10470#L20 assume !(~n < 1); 10469#L22 assume 1 == ~n;#res := 1; 10465#fibo2FINAL assume true; 10463#fibo2EXIT >#52#return; 10464#L15-1 call #t~ret8 := fibo2(~n - 2);< 10497#fibo2ENTRY ~n := #in~n; 10514#L20 assume ~n < 1;#res := 0; 10513#fibo2FINAL assume true; 10496#fibo2EXIT >#54#return; 10495#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 10493#fibo1FINAL assume true; 10490#fibo1EXIT >#48#return; 10486#L25-1 call #t~ret10 := fibo1(~n - 2);< 10487#fibo1ENTRY ~n := #in~n; 10494#L10 assume !(~n < 1); 10492#L12 assume 1 == ~n;#res := 1; 10489#fibo1FINAL assume true; 10485#fibo1EXIT >#50#return; 10483#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret10;havoc #t~ret9; 10482#fibo2FINAL assume true; 10481#fibo2EXIT >#52#return; 10419#L15-1 call #t~ret8 := fibo2(~n - 2);< 10477#fibo2ENTRY ~n := #in~n; 10519#L20 assume ~n < 1;#res := 0; 10520#fibo2FINAL assume true; 10547#fibo2EXIT >#54#return; 10476#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 10478#fibo1FINAL assume true; 10472#fibo1EXIT >#48#return; 10445#L25-1 call #t~ret10 := fibo1(~n - 2);< 10350#fibo1ENTRY ~n := #in~n; 10506#L10 assume !(~n < 1); 10504#L12 assume !(1 == ~n); 10444#L15 call #t~ret7 := fibo2(~n - 1);< 10446#fibo2ENTRY [2020-10-20 08:01:02,775 INFO L796 eck$LassoCheckResult]: Loop: 10446#fibo2ENTRY ~n := #in~n; 10510#L20 assume !(~n < 1); 10508#L22 assume !(1 == ~n); 10336#L25 call #t~ret9 := fibo1(~n - 1);< 10507#fibo1ENTRY ~n := #in~n; 10505#L10 assume !(~n < 1); 10502#L12 assume !(1 == ~n); 10475#L15 call #t~ret7 := fibo2(~n - 1);< 10446#fibo2ENTRY [2020-10-20 08:01:02,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:02,775 INFO L82 PathProgramCache]: Analyzing trace with hash -246198455, now seen corresponding path program 2 times [2020-10-20 08:01:02,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:01:02,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489963508] [2020-10-20 08:01:02,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:01:02,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:02,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-20 08:01:02,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:02,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 08:01:02,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:02,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 08:01:02,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:02,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 08:01:02,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:02,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-20 08:01:02,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:02,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-20 08:01:02,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:02,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-20 08:01:02,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:02,923 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 32 proven. 27 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-20 08:01:02,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489963508] [2020-10-20 08:01:02,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65124661] [2020-10-20 08:01:02,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 08:01:02,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-20 08:01:02,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 08:01:02,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-20 08:01:02,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:03,069 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 31 proven. 27 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-10-20 08:01:03,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 08:01:03,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 15 [2020-10-20 08:01:03,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860400338] [2020-10-20 08:01:03,070 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-20 08:01:03,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:03,071 INFO L82 PathProgramCache]: Analyzing trace with hash 996300776, now seen corresponding path program 3 times [2020-10-20 08:01:03,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:01:03,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889409184] [2020-10-20 08:01:03,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:01:03,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:01:03,075 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:01:03,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:01:03,077 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:01:03,078 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 08:01:03,167 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 08:01:03,167 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 08:01:03,167 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 08:01:03,167 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 08:01:03,167 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-20 08:01:03,167 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:03,168 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 08:01:03,168 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 08:01:03,168 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_6-1.c_Iteration9_Loop [2020-10-20 08:01:03,168 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 08:01:03,168 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 08:01:03,169 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:03,172 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:03,174 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:03,177 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:03,179 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:03,182 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:03,191 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:03,194 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:03,197 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:03,199 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:03,261 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 08:01:03,261 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:01:03,265 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:01:03,266 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 66 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:03,271 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:01:03,271 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#t~ret7=0} Honda state: {fibo1_#t~ret7=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:01:03,319 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:01:03,319 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 67 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:03,323 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:01:03,324 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_~n=0} Honda state: {fibo1_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:01:03,367 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:01:03,367 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 68 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:03,371 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:01:03,372 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#res=0} Honda state: {fibo1_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:01:03,414 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:01:03,414 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 69 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:03,418 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:01:03,418 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#in~n=0} Honda state: {fibo1_#in~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:01:03,458 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:01:03,458 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 70 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:03,462 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:01:03,462 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#t~ret9=0} Honda state: {fibo2_#t~ret9=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:01:03,500 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:01:03,500 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 71 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 72 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:01:03,542 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-20 08:01:03,542 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 72 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:03,583 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-20 08:01:03,585 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 08:01:03,585 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 08:01:03,585 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 08:01:03,585 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 08:01:03,585 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-20 08:01:03,585 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:03,585 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 08:01:03,586 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 08:01:03,586 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_6-1.c_Iteration9_Loop [2020-10-20 08:01:03,586 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 08:01:03,586 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 08:01:03,587 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:03,590 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:03,592 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:03,594 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:03,596 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:03,598 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:03,600 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:03,602 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:03,610 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:03,612 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:03,681 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 08:01:03,682 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:03,685 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 08:01:03,686 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:03,686 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:03,686 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:03,686 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:03,686 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:03,687 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:03,687 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:03,689 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 74 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:03,711 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 08:01:03,712 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:03,712 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:03,713 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:03,713 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:03,713 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:03,713 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:03,713 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:03,714 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 75 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:03,736 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 08:01:03,738 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:03,738 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:03,738 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:03,739 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:03,739 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:03,740 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:03,740 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:03,742 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:03,764 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 08:01:03,765 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:03,765 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:03,765 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:03,765 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:03,765 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:03,766 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:03,766 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:03,767 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:03,790 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 08:01:03,791 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:03,791 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:03,792 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:03,792 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:03,792 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:03,792 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:03,792 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:03,793 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 78 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:03,817 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 08:01:03,818 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:03,818 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:03,818 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:03,818 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:03,818 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:03,819 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:03,819 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:03,820 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 79 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:01:03,858 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 08:01:03,860 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:03,860 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:03,860 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:03,860 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:03,861 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:03,861 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. Waiting until toolchain timeout for monitored process 79 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:03,861 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:03,862 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 80 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 80 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:03,884 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 08:01:03,885 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:03,885 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:03,885 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:03,885 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:03,885 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:03,886 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:03,886 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:03,889 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-20 08:01:03,893 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-20 08:01:03,893 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 81 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 81 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:03,903 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-20 08:01:03,904 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-20 08:01:03,904 INFO L510 LassoAnalysis]: Proved termination. [2020-10-20 08:01:03,904 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo2_#in~n) = 1*fibo2_#in~n Supporting invariants [] [2020-10-20 08:01:03,924 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-20 08:01:03,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:04,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:04,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-20 08:01:04,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:04,022 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:04,025 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:04,026 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:04,029 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:04,031 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:04,033 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:04,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:04,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-20 08:01:04,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:04,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 08:01:04,082 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 [2020-10-20 08:01:04,083 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 255 states and 286 transitions. cyclomatic complexity: 34 Second operand 7 states. [2020-10-20 08:01:04,194 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 255 states and 286 transitions. cyclomatic complexity: 34. Second operand 7 states. Result 273 states and 304 transitions. Complement of second has 15 states. [2020-10-20 08:01:04,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2020-10-20 08:01:04,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-20 08:01:04,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 17 transitions. [2020-10-20 08:01:04,199 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 17 transitions. Stem has 58 letters. Loop has 8 letters. [2020-10-20 08:01:04,199 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:04,199 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-20 08:01:04,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:04,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:04,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-20 08:01:04,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:04,313 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:04,315 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:04,317 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:04,319 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:04,320 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:04,323 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:04,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:04,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-20 08:01:04,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:04,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 08:01:04,385 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 5 loop predicates [2020-10-20 08:01:04,385 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 255 states and 286 transitions. cyclomatic complexity: 34 Second operand 7 states. [2020-10-20 08:01:04,497 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 255 states and 286 transitions. cyclomatic complexity: 34. Second operand 7 states. Result 273 states and 304 transitions. Complement of second has 15 states. [2020-10-20 08:01:04,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2020-10-20 08:01:04,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-20 08:01:04,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 17 transitions. [2020-10-20 08:01:04,505 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 17 transitions. Stem has 58 letters. Loop has 8 letters. [2020-10-20 08:01:04,505 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:04,506 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-20 08:01:04,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:04,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:04,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-20 08:01:04,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:04,614 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:04,617 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:04,619 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:04,621 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:04,623 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:04,640 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:04,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:04,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-20 08:01:04,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:04,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 08:01:04,703 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 5 loop predicates [2020-10-20 08:01:04,704 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 255 states and 286 transitions. cyclomatic complexity: 34 Second operand 7 states. [2020-10-20 08:01:04,857 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 255 states and 286 transitions. cyclomatic complexity: 34. Second operand 7 states. Result 393 states and 429 transitions. Complement of second has 25 states. [2020-10-20 08:01:04,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 8 states 2 stem states 5 non-accepting loop states 1 accepting loop states [2020-10-20 08:01:04,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-20 08:01:04,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 42 transitions. [2020-10-20 08:01:04,858 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 42 transitions. Stem has 58 letters. Loop has 8 letters. [2020-10-20 08:01:04,859 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:04,859 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 42 transitions. Stem has 66 letters. Loop has 8 letters. [2020-10-20 08:01:04,859 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:04,859 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 42 transitions. Stem has 58 letters. Loop has 16 letters. [2020-10-20 08:01:04,860 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:04,860 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 393 states and 429 transitions. [2020-10-20 08:01:04,864 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 23 [2020-10-20 08:01:04,867 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 393 states to 277 states and 306 transitions. [2020-10-20 08:01:04,868 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 151 [2020-10-20 08:01:04,868 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 170 [2020-10-20 08:01:04,868 INFO L73 IsDeterministic]: Start isDeterministic. Operand 277 states and 306 transitions. [2020-10-20 08:01:04,868 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 08:01:04,869 INFO L691 BuchiCegarLoop]: Abstraction has 277 states and 306 transitions. [2020-10-20 08:01:04,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states and 306 transitions. [2020-10-20 08:01:04,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 263. [2020-10-20 08:01:04,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 263 states. [2020-10-20 08:01:04,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 292 transitions. [2020-10-20 08:01:04,880 INFO L714 BuchiCegarLoop]: Abstraction has 263 states and 292 transitions. [2020-10-20 08:01:04,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 08:01:04,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-20 08:01:04,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2020-10-20 08:01:04,881 INFO L87 Difference]: Start difference. First operand 263 states and 292 transitions. Second operand 15 states. [2020-10-20 08:01:05,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 08:01:05,186 INFO L93 Difference]: Finished difference Result 272 states and 304 transitions. [2020-10-20 08:01:05,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-20 08:01:05,187 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 272 states and 304 transitions. [2020-10-20 08:01:05,203 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 20 [2020-10-20 08:01:05,207 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 272 states to 269 states and 301 transitions. [2020-10-20 08:01:05,207 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 164 [2020-10-20 08:01:05,207 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 164 [2020-10-20 08:01:05,208 INFO L73 IsDeterministic]: Start isDeterministic. Operand 269 states and 301 transitions. [2020-10-20 08:01:05,208 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 08:01:05,208 INFO L691 BuchiCegarLoop]: Abstraction has 269 states and 301 transitions. [2020-10-20 08:01:05,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states and 301 transitions. [2020-10-20 08:01:05,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 264. [2020-10-20 08:01:05,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-10-20 08:01:05,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 292 transitions. [2020-10-20 08:01:05,216 INFO L714 BuchiCegarLoop]: Abstraction has 264 states and 292 transitions. [2020-10-20 08:01:05,216 INFO L594 BuchiCegarLoop]: Abstraction has 264 states and 292 transitions. [2020-10-20 08:01:05,216 INFO L427 BuchiCegarLoop]: ======== Iteration 10============ [2020-10-20 08:01:05,217 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 264 states and 292 transitions. [2020-10-20 08:01:05,219 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 20 [2020-10-20 08:01:05,219 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 08:01:05,219 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 08:01:05,224 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [6, 6, 6, 5, 5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 08:01:05,225 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 08:01:05,227 INFO L794 eck$LassoCheckResult]: Stem: 13105#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(18);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 13097#L-1 havoc main_#res;havoc main_#t~ret11, main_~x~0, main_~result~0;main_~x~0 := 6; 13071#L39 call main_#t~ret11 := fibo1(main_~x~0);< 13072#fibo1ENTRY ~n := #in~n; 13226#L10 assume !(~n < 1); 13224#L12 assume !(1 == ~n); 13216#L15 call #t~ret7 := fibo2(~n - 1);< 13219#fibo2ENTRY ~n := #in~n; 13218#L20 assume !(~n < 1); 13217#L22 assume !(1 == ~n); 13212#L25 call #t~ret9 := fibo1(~n - 1);< 13215#fibo1ENTRY ~n := #in~n; 13214#L10 assume !(~n < 1); 13213#L12 assume !(1 == ~n); 13041#L15 call #t~ret7 := fibo2(~n - 1);< 13207#fibo2ENTRY ~n := #in~n; 13202#L20 assume !(~n < 1); 13200#L22 assume !(1 == ~n); 13192#L25 call #t~ret9 := fibo1(~n - 1);< 13199#fibo1ENTRY ~n := #in~n; 13197#L10 assume !(~n < 1); 13195#L12 assume !(1 == ~n); 13189#L15 call #t~ret7 := fibo2(~n - 1);< 13193#fibo2ENTRY ~n := #in~n; 13198#L20 assume !(~n < 1); 13196#L22 assume 1 == ~n;#res := 1; 13194#fibo2FINAL assume true; 13188#fibo2EXIT >#52#return; 13190#L15-1 call #t~ret8 := fibo2(~n - 2);< 13278#fibo2ENTRY ~n := #in~n; 13280#L20 assume ~n < 1;#res := 0; 13279#fibo2FINAL assume true; 13277#fibo2EXIT >#54#return; 13275#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 13273#fibo1FINAL assume true; 13272#fibo1EXIT >#48#return; 13089#L25-1 call #t~ret10 := fibo1(~n - 2);< 13090#fibo1ENTRY ~n := #in~n; 13284#L10 assume !(~n < 1); 13283#L12 assume 1 == ~n;#res := 1; 13271#fibo1FINAL assume true; 13269#fibo1EXIT >#50#return; 13040#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret10;havoc #t~ret9; 13042#fibo2FINAL assume true; 13255#fibo2EXIT >#52#return; 13084#L15-1 call #t~ret8 := fibo2(~n - 2);< 13156#fibo2ENTRY ~n := #in~n; 13158#L20 assume !(~n < 1); 13152#L22 assume !(1 == ~n); 13144#L25 call #t~ret9 := fibo1(~n - 1);< 13151#fibo1ENTRY ~n := #in~n; 13150#L10 assume !(~n < 1); 13143#L12 assume !(1 == ~n); 13064#L15 call #t~ret7 := fibo2(~n - 1);< 13185#fibo2ENTRY ~n := #in~n; 13187#L20 assume !(~n < 1); 13062#L22 assume !(1 == ~n); 13065#L25 call #t~ret9 := fibo1(~n - 1);< 13182#fibo1ENTRY ~n := #in~n; 13180#L10 assume !(~n < 1); 13178#L12 assume !(1 == ~n); 13175#L15 [2020-10-20 08:01:05,228 INFO L796 eck$LassoCheckResult]: Loop: 13175#L15 call #t~ret7 := fibo2(~n - 1);< 13176#fibo2ENTRY ~n := #in~n; 13183#L20 assume !(~n < 1); 13184#L22 assume !(1 == ~n); 13172#L25 call #t~ret9 := fibo1(~n - 1);< 13182#fibo1ENTRY ~n := #in~n; 13180#L10 assume !(~n < 1); 13178#L12 assume !(1 == ~n); 13175#L15 [2020-10-20 08:01:05,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:05,228 INFO L82 PathProgramCache]: Analyzing trace with hash -1632318521, now seen corresponding path program 3 times [2020-10-20 08:01:05,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:01:05,232 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634454467] [2020-10-20 08:01:05,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:01:05,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:05,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-20 08:01:05,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:05,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 08:01:05,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:05,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 08:01:05,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:05,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-20 08:01:05,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:05,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-20 08:01:05,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:05,404 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 65 proven. 23 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-20 08:01:05,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634454467] [2020-10-20 08:01:05,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788871895] [2020-10-20 08:01:05,405 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 08:01:05,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-20 08:01:05,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 08:01:05,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-20 08:01:05,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:05,544 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 65 proven. 23 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-20 08:01:05,544 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 08:01:05,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 18 [2020-10-20 08:01:05,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655331886] [2020-10-20 08:01:05,545 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-20 08:01:05,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:05,546 INFO L82 PathProgramCache]: Analyzing trace with hash 1544065082, now seen corresponding path program 4 times [2020-10-20 08:01:05,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:01:05,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347760925] [2020-10-20 08:01:05,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:01:05,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:01:05,549 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:01:05,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:01:05,551 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:01:05,552 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 08:01:05,675 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 08:01:05,675 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 08:01:05,675 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 08:01:05,675 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 08:01:05,676 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-20 08:01:05,676 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:05,676 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 08:01:05,676 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 08:01:05,676 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_6-1.c_Iteration10_Loop [2020-10-20 08:01:05,676 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 08:01:05,676 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 08:01:05,678 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:05,696 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:05,698 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:05,701 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:05,703 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:05,706 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:05,708 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:05,711 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:05,722 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:05,794 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 08:01:05,795 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 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 83 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:05,799 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:01:05,799 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 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 84 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:05,829 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-20 08:01:05,830 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:01:07,845 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-20 08:01:07,847 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 08:01:07,847 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 08:01:07,847 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 08:01:07,847 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 08:01:07,847 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-20 08:01:07,847 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:07,848 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 08:01:07,848 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 08:01:07,848 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_6-1.c_Iteration10_Loop [2020-10-20 08:01:07,848 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 08:01:07,848 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 08:01:07,849 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:07,860 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:07,862 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:07,865 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:07,867 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:07,869 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:07,871 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:07,873 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:07,875 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:07,946 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 08:01:07,946 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 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 85 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:07,951 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 08:01:07,952 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:07,952 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:07,953 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:07,953 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:07,953 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:07,954 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:07,954 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:07,956 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-20 08:01:07,959 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-20 08:01:07,959 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 86 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 86 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:07,964 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-20 08:01:07,964 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-20 08:01:07,964 INFO L510 LassoAnalysis]: Proved termination. [2020-10-20 08:01:07,964 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo1_~n) = 1*fibo1_~n Supporting invariants [] [2020-10-20 08:01:07,984 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-20 08:01:07,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:08,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:08,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-20 08:01:08,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:08,092 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:08,094 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:08,096 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:08,098 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:08,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:08,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-20 08:01:08,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:08,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 08:01:08,168 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 6 loop predicates [2020-10-20 08:01:08,168 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 264 states and 292 transitions. cyclomatic complexity: 31 Second operand 8 states. [2020-10-20 08:01:08,295 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 264 states and 292 transitions. cyclomatic complexity: 31. Second operand 8 states. Result 288 states and 316 transitions. Complement of second has 19 states. [2020-10-20 08:01:08,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 8 states 2 stem states 5 non-accepting loop states 1 accepting loop states [2020-10-20 08:01:08,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-20 08:01:08,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 20 transitions. [2020-10-20 08:01:08,296 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 20 transitions. Stem has 61 letters. Loop has 8 letters. [2020-10-20 08:01:08,296 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:08,296 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-20 08:01:08,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:08,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:08,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-20 08:01:08,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:08,401 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:08,403 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:08,407 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:08,413 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:08,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:08,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-20 08:01:08,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:08,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 08:01:08,500 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 6 loop predicates [2020-10-20 08:01:08,500 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 264 states and 292 transitions. cyclomatic complexity: 31 Second operand 8 states. [2020-10-20 08:01:08,661 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 264 states and 292 transitions. cyclomatic complexity: 31. Second operand 8 states. Result 288 states and 316 transitions. Complement of second has 21 states. [2020-10-20 08:01:08,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 9 states 2 stem states 6 non-accepting loop states 1 accepting loop states [2020-10-20 08:01:08,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-20 08:01:08,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 19 transitions. [2020-10-20 08:01:08,663 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 19 transitions. Stem has 61 letters. Loop has 8 letters. [2020-10-20 08:01:08,664 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:08,664 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-20 08:01:08,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:08,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:08,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-20 08:01:08,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:08,778 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:08,780 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:08,781 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:08,785 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:08,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:08,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-20 08:01:08,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:08,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 08:01:08,860 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 6 loop predicates [2020-10-20 08:01:08,860 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 264 states and 292 transitions. cyclomatic complexity: 31 Second operand 8 states. [2020-10-20 08:01:09,011 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 264 states and 292 transitions. cyclomatic complexity: 31. Second operand 8 states. Result 606 states and 695 transitions. Complement of second has 33 states. [2020-10-20 08:01:09,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 8 states 2 stem states 5 non-accepting loop states 1 accepting loop states [2020-10-20 08:01:09,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-20 08:01:09,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 43 transitions. [2020-10-20 08:01:09,013 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 43 transitions. Stem has 61 letters. Loop has 8 letters. [2020-10-20 08:01:09,013 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:09,014 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 43 transitions. Stem has 69 letters. Loop has 8 letters. [2020-10-20 08:01:09,014 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:09,014 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 43 transitions. Stem has 61 letters. Loop has 16 letters. [2020-10-20 08:01:09,015 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:09,015 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 606 states and 695 transitions. [2020-10-20 08:01:09,020 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-10-20 08:01:09,021 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 606 states to 0 states and 0 transitions. [2020-10-20 08:01:09,021 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2020-10-20 08:01:09,021 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2020-10-20 08:01:09,021 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2020-10-20 08:01:09,021 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-20 08:01:09,021 INFO L691 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-20 08:01:09,022 INFO L714 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-20 08:01:09,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 08:01:09,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-20 08:01:09,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2020-10-20 08:01:09,023 INFO L87 Difference]: Start difference. First operand 0 states and 0 transitions. Second operand 18 states. [2020-10-20 08:01:09,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 08:01:09,023 INFO L93 Difference]: Finished difference Result 0 states and 0 transitions. [2020-10-20 08:01:09,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-20 08:01:09,023 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 0 states and 0 transitions. [2020-10-20 08:01:09,024 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-10-20 08:01:09,024 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 0 states to 0 states and 0 transitions. [2020-10-20 08:01:09,024 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2020-10-20 08:01:09,024 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2020-10-20 08:01:09,024 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2020-10-20 08:01:09,025 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-20 08:01:09,025 INFO L691 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-20 08:01:09,025 INFO L714 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-20 08:01:09,025 INFO L594 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-20 08:01:09,025 INFO L427 BuchiCegarLoop]: ======== Iteration 11============ [2020-10-20 08:01:09,025 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2020-10-20 08:01:09,026 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-10-20 08:01:09,026 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2020-10-20 08:01:09,033 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 20.10 08:01:09 BoogieIcfgContainer [2020-10-20 08:01:09,033 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2020-10-20 08:01:09,034 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 08:01:09,034 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 08:01:09,035 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 08:01:09,035 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 08:00:47" (3/4) ... [2020-10-20 08:01:09,039 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-10-20 08:01:09,040 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 08:01:09,042 INFO L168 Benchmark]: Toolchain (without parser) took 22760.49 ms. Allocated memory was 35.1 MB in the beginning and 121.1 MB in the end (delta: 86.0 MB). Free memory was 12.5 MB in the beginning and 53.0 MB in the end (delta: -40.5 MB). Peak memory consumption was 45.4 MB. Max. memory is 14.3 GB. [2020-10-20 08:01:09,043 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 33.6 MB. Free memory was 18.4 MB in the beginning and 18.3 MB in the end (delta: 41.7 kB). Peak memory consumption was 41.7 kB. Max. memory is 14.3 GB. [2020-10-20 08:01:09,044 INFO L168 Benchmark]: CACSL2BoogieTranslator took 458.44 ms. Allocated memory was 35.1 MB in the beginning and 43.0 MB in the end (delta: 7.9 MB). Free memory was 11.5 MB in the beginning and 26.5 MB in the end (delta: -14.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 14.3 GB. [2020-10-20 08:01:09,044 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.44 ms. Allocated memory is still 43.0 MB. Free memory was 26.5 MB in the beginning and 24.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 14.3 GB. [2020-10-20 08:01:09,045 INFO L168 Benchmark]: Boogie Preprocessor took 20.01 ms. Allocated memory is still 43.0 MB. Free memory was 24.9 MB in the beginning and 23.7 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 14.3 GB. [2020-10-20 08:01:09,045 INFO L168 Benchmark]: RCFGBuilder took 312.24 ms. Allocated memory was 43.0 MB in the beginning and 42.5 MB in the end (delta: -524.3 kB). Free memory was 23.6 MB in the beginning and 21.2 MB in the end (delta: 2.4 MB). Peak memory consumption was 13.3 MB. Max. memory is 14.3 GB. [2020-10-20 08:01:09,046 INFO L168 Benchmark]: BuchiAutomizer took 21912.48 ms. Allocated memory was 42.5 MB in the beginning and 121.1 MB in the end (delta: 78.6 MB). Free memory was 20.9 MB in the beginning and 53.0 MB in the end (delta: -32.1 MB). Peak memory consumption was 46.6 MB. Max. memory is 14.3 GB. [2020-10-20 08:01:09,046 INFO L168 Benchmark]: Witness Printer took 5.67 ms. Allocated memory is still 121.1 MB. Free memory is still 53.0 MB. There was no memory consumed. Max. memory is 14.3 GB. [2020-10-20 08:01:09,050 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 33.6 MB. Free memory was 18.4 MB in the beginning and 18.3 MB in the end (delta: 41.7 kB). Peak memory consumption was 41.7 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 458.44 ms. Allocated memory was 35.1 MB in the beginning and 43.0 MB in the end (delta: 7.9 MB). Free memory was 11.5 MB in the beginning and 26.5 MB in the end (delta: -14.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 40.44 ms. Allocated memory is still 43.0 MB. Free memory was 26.5 MB in the beginning and 24.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 20.01 ms. Allocated memory is still 43.0 MB. Free memory was 24.9 MB in the beginning and 23.7 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 14.3 GB. * RCFGBuilder took 312.24 ms. Allocated memory was 43.0 MB in the beginning and 42.5 MB in the end (delta: -524.3 kB). Free memory was 23.6 MB in the beginning and 21.2 MB in the end (delta: 2.4 MB). Peak memory consumption was 13.3 MB. Max. memory is 14.3 GB. * BuchiAutomizer took 21912.48 ms. Allocated memory was 42.5 MB in the beginning and 121.1 MB in the end (delta: 78.6 MB). Free memory was 20.9 MB in the beginning and 53.0 MB in the end (delta: -32.1 MB). Peak memory consumption was 46.6 MB. Max. memory is 14.3 GB. * Witness Printer took 5.67 ms. Allocated memory is still 121.1 MB. Free memory is still 53.0 MB. There was no memory consumed. Max. memory is 14.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 15 terminating modules (9 trivial, 2 deterministic, 4 nondeterministic). One deterministic module has affine ranking function \old(n) and consists of 7 locations. One deterministic module has affine ranking function n and consists of 12 locations. One nondeterministic module has affine ranking function \old(n) and consists of 8 locations. One nondeterministic module has affine ranking function n and consists of 12 locations. One nondeterministic module has affine ranking function \old(n) and consists of 8 locations. One nondeterministic module has affine ranking function n and consists of 8 locations. 9 modules have a trivial ranking function, the largest among these consists of 19 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 21.8s and 11 iterations. TraceHistogramMax:8. Analysis of lassos took 12.4s. Construction of modules took 2.4s. Büchi inclusion checks took 6.2s. Highest rank in rank-based complementation 3. Minimization of det autom 2. Minimization of nondet autom 13. Automata minimization 0.2s AutomataMinimizationTime, 13 MinimizatonAttempts, 191 StatesRemovedByMinimization, 13 NontrivialMinimizations. Non-live state removal took 0.1s Buchi closure took 0.0s. Biggest automaton had 264 states and ocurred in iteration 9. Nontrivial modules had stage [2, 0, 4, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/6 HoareTripleCheckerStatistics: 437 SDtfs, 1089 SDslu, 1194 SDs, 0 SdLazy, 2786 SolverSat, 572 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.4s Time LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT1 conc0 concLT0 SILN0 SILU0 SILI4 SILT5 lasso0 LassoPreprocessingBenchmarks: Lassos: inital20 mio100 ax100 hnf79 lsp93 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq186 hnf93 smp75 dnf100 smp100 tf110 neg96 sie107 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 32ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 23 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 6 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 4.2s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...