./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/recursive-simple/fibo_2calls_8-2.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_8-2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(F end) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f63c6229f0a09709710be77b7ac5a08c2c6f5392 ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 08:00:52,740 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 08:00:52,744 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 08:00:52,783 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 08:00:52,784 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 08:00:52,793 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 08:00:52,796 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 08:00:52,800 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 08:00:52,802 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 08:00:52,805 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 08:00:52,807 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 08:00:52,808 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 08:00:52,808 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 08:00:52,812 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 08:00:52,814 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 08:00:52,816 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 08:00:52,817 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 08:00:52,818 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 08:00:52,820 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 08:00:52,828 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 08:00:52,831 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 08:00:52,840 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 08:00:52,842 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 08:00:52,843 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 08:00:52,855 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 08:00:52,858 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 08:00:52,859 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 08:00:52,860 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 08:00:52,860 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 08:00:52,861 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 08:00:52,863 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 08:00:52,864 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 08:00:52,865 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 08:00:52,869 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 08:00:52,870 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 08:00:52,870 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 08:00:52,871 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 08:00:52,873 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 08:00:52,873 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 08:00:52,874 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 08:00:52,875 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 08:00:52,876 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-32bit-Automizer_Default.epf [2020-10-20 08:00:52,915 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 08:00:52,915 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 08:00:52,917 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 08:00:52,917 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 08:00:52,917 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 08:00:52,918 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2020-10-20 08:00:52,918 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2020-10-20 08:00:52,918 INFO L138 SettingsManager]: * Use old map elimination=false [2020-10-20 08:00:52,918 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2020-10-20 08:00:52,918 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2020-10-20 08:00:52,920 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2020-10-20 08:00:52,920 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 08:00:52,920 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-20 08:00:52,921 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-10-20 08:00:52,921 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-20 08:00:52,921 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-20 08:00:52,921 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 08:00:52,922 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2020-10-20 08:00:52,922 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2020-10-20 08:00:52,922 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2020-10-20 08:00:52,923 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-20 08:00:52,923 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-20 08:00:52,923 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2020-10-20 08:00:52,923 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 08:00:52,924 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2020-10-20 08:00:52,924 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 08:00:52,924 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 08:00:52,924 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2020-10-20 08:00:52,925 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 08:00:52,925 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-20 08:00:52,925 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 08:00:52,925 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2020-10-20 08:00:52,927 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2020-10-20 08:00:52,927 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 -> f63c6229f0a09709710be77b7ac5a08c2c6f5392 [2020-10-20 08:00:53,132 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 08:00:53,145 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 08:00:53,149 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 08:00:53,150 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 08:00:53,151 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 08:00:53,152 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/fibo_2calls_8-2.c [2020-10-20 08:00:53,240 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/85cdc0cb9/b2520455a7bc4bf38e4678345abb998d/FLAGe4f6a57f0 [2020-10-20 08:00:53,748 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 08:00:53,748 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_2calls_8-2.c [2020-10-20 08:00:53,755 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/85cdc0cb9/b2520455a7bc4bf38e4678345abb998d/FLAGe4f6a57f0 [2020-10-20 08:00:54,132 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/85cdc0cb9/b2520455a7bc4bf38e4678345abb998d [2020-10-20 08:00:54,135 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 08:00:54,141 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-20 08:00:54,142 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 08:00:54,142 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 08:00:54,147 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 08:00:54,148 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 08:00:54" (1/1) ... [2020-10-20 08:00:54,151 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b131d2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 08:00:54, skipping insertion in model container [2020-10-20 08:00:54,152 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 08:00:54" (1/1) ... [2020-10-20 08:00:54,161 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 08:00:54,181 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 08:00:54,358 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 08:00:54,369 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 08:00:54,385 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 08:00:54,400 INFO L208 MainTranslator]: Completed translation [2020-10-20 08:00:54,400 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 08:00:54 WrapperNode [2020-10-20 08:00:54,401 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 08:00:54,401 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-20 08:00:54,402 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-20 08:00:54,402 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-20 08:00:54,411 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 08:00:54" (1/1) ... [2020-10-20 08:00:54,419 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 08:00:54" (1/1) ... [2020-10-20 08:00:54,437 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-20 08:00:54,437 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 08:00:54,437 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 08:00:54,438 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 08:00:54,447 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 08:00:54" (1/1) ... [2020-10-20 08:00:54,447 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 08:00:54" (1/1) ... [2020-10-20 08:00:54,448 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 08:00:54" (1/1) ... [2020-10-20 08:00:54,449 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 08:00:54" (1/1) ... [2020-10-20 08:00:54,453 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 08:00:54" (1/1) ... [2020-10-20 08:00:54,455 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 08:00:54" (1/1) ... [2020-10-20 08:00:54,456 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 08:00:54" (1/1) ... [2020-10-20 08:00:54,458 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 08:00:54,459 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 08:00:54,459 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 08:00:54,459 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 08:00:54,460 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 08:00:54" (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 08:00:54,523 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-20 08:00:54,523 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-10-20 08:00:54,523 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-10-20 08:00:54,524 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-20 08:00:54,524 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-10-20 08:00:54,524 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-10-20 08:00:54,524 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 08:00:54,524 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 08:00:54,744 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 08:00:54,744 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-20 08:00:54,746 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 08:00:54 BoogieIcfgContainer [2020-10-20 08:00:54,747 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 08:00:54,748 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2020-10-20 08:00:54,748 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2020-10-20 08:00:54,754 INFO L275 PluginConnector]: BuchiAutomizer initialized [2020-10-20 08:00:54,755 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-20 08:00:54,755 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 20.10 08:00:54" (1/3) ... [2020-10-20 08:00:54,757 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@3dbf8cc5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 20.10 08:00:54, skipping insertion in model container [2020-10-20 08:00:54,757 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-20 08:00:54,757 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 08:00:54" (2/3) ... [2020-10-20 08:00:54,758 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@3dbf8cc5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 20.10 08:00:54, skipping insertion in model container [2020-10-20 08:00:54,758 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-20 08:00:54,758 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 08:00:54" (3/3) ... [2020-10-20 08:00:54,760 INFO L373 chiAutomizerObserver]: Analyzing ICFG fibo_2calls_8-2.c [2020-10-20 08:00:54,821 INFO L359 BuchiCegarLoop]: Interprodecural is true [2020-10-20 08:00:54,821 INFO L360 BuchiCegarLoop]: Hoare is false [2020-10-20 08:00:54,822 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2020-10-20 08:00:54,822 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 08:00:54,822 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 08:00:54,822 INFO L364 BuchiCegarLoop]: Difference is false [2020-10-20 08:00:54,822 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 08:00:54,823 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2020-10-20 08:00:54,854 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 27 states. [2020-10-20 08:00:54,914 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2020-10-20 08:00:54,917 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 08:00:54,918 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 08:00:54,936 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2020-10-20 08:00:54,939 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 08:00:54,939 INFO L427 BuchiCegarLoop]: ======== Iteration 1============ [2020-10-20 08:00:54,940 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 27 states. [2020-10-20 08:00:54,947 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2020-10-20 08:00:54,947 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 08:00:54,948 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 08:00:54,949 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2020-10-20 08:00:54,950 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 08:00:54,968 INFO L794 eck$LassoCheckResult]: Stem: 26#ULTIMATE.startENTRYtrue #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(18);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 12#L-1true havoc main_#res;havoc main_#t~ret11, main_~x~0, main_~result~0;main_~x~0 := 8; 22#L39true call main_#t~ret11 := fibo1(main_~x~0);< 27#fibo1ENTRYtrue [2020-10-20 08:00:54,972 INFO L796 eck$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 08:00:54,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:54,990 INFO L82 PathProgramCache]: Analyzing trace with hash 29898, now seen corresponding path program 1 times [2020-10-20 08:00:55,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:00:55,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574715588] [2020-10-20 08:00:55,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:00:55,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:00:55,099 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:00:55,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:00:55,115 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:00:55,135 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 08:00:55,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:55,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1206117480, now seen corresponding path program 1 times [2020-10-20 08:00:55,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:00:55,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863970859] [2020-10-20 08:00:55,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:00:55,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:00:55,146 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:00:55,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:00:55,152 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:00:55,154 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 08:00:55,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:55,156 INFO L82 PathProgramCache]: Analyzing trace with hash -1276411855, now seen corresponding path program 1 times [2020-10-20 08:00:55,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:00:55,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904718116] [2020-10-20 08:00:55,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:00:55,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:00:55,177 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:00:55,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:00:55,196 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:00:55,202 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 08:00:55,408 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 08:00:55,409 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 08:00:55,410 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 08:00:55,410 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 08:00:55,410 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-20 08:00:55,411 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:55,411 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 08:00:55,411 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 08:00:55,411 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_8-2.c_Iteration1_Loop [2020-10-20 08:00:55,411 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 08:00:55,412 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 08:00:55,432 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 08:00:55,439 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 08:00:55,442 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 08:00:55,446 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 08:00:55,449 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 08:00:55,453 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 08:00:55,456 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 08:00:55,471 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 08:00:55,476 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 08:00:55,502 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 08:00:55,616 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 08:00:55,617 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 08:00:55,632 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:00:55,632 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 08:00:55,642 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:00:55,643 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) [2020-10-20 08:00:55,691 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:00:55,691 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:55,703 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:00:55,703 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 08:00:55,751 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:00:55,751 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 08:00:55,756 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:00:55,757 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) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:55,792 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:00:55,792 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:00:55,799 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:00:55,800 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) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:55,827 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:00:55,827 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:00:55,835 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:00:55,835 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) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:55,867 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:00:55,867 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:00:55,882 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:00:55,882 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) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:55,912 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:00:55,912 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:00:55,915 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:00:55,915 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 08:00:55,940 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:00:55,940 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:00:55,950 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:00:55,951 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 08:00:55,980 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:00:55,980 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 08:00:56,005 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-20 08:00:56,006 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 08:00:56,065 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-20 08:00:56,068 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 08:00:56,068 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 08:00:56,068 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 08:00:56,068 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 08:00:56,068 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-20 08:00:56,068 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:56,069 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 08:00:56,069 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 08:00:56,069 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_8-2.c_Iteration1_Loop [2020-10-20 08:00:56,069 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 08:00:56,069 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 08:00:56,072 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 08:00:56,079 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 08:00:56,082 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 08:00:56,086 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 08:00:56,089 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 08:00:56,092 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 08:00:56,095 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 08:00:56,098 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 08:00:56,101 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 08:00:56,112 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 08:00:56,205 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 08:00:56,211 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) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:56,224 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 08:00:56,226 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:00:56,226 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:00:56,227 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:00:56,227 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:00:56,227 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:00:56,229 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:00:56,230 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:00:56,232 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 08:00:56,279 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 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:56,281 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:00:56,281 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:00:56,281 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:00:56,281 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:00:56,281 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:00:56,282 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:00:56,282 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:00:56,289 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) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:56,323 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 08:00:56,324 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:00:56,325 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:00:56,325 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:00:56,325 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:00:56,325 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:00:56,326 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:00:56,326 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:00:56,328 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 08:00:56,357 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 08:00:56,359 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:00:56,359 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:00:56,360 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:00:56,360 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:00:56,360 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:00:56,361 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:00:56,361 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:00:56,363 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) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:56,402 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 08:00:56,404 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:00:56,404 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:00:56,405 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:00:56,405 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:00:56,405 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:00:56,406 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:00:56,406 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:00:56,411 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 17 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 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:56,440 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 08:00:56,442 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:00:56,442 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:00:56,442 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:00:56,442 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:00:56,442 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:00:56,443 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:00:56,443 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:00:56,445 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) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:56,468 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 08:00:56,470 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:00:56,470 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:00:56,470 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:00:56,470 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:00:56,470 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:00:56,471 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:00:56,471 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:00:56,472 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:56,506 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 08:00:56,508 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:00:56,508 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:00:56,508 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:00:56,508 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:00:56,508 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:00:56,509 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:00:56,509 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:00:56,522 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) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:56,554 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 08:00:56,556 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:00:56,556 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:00:56,556 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:00:56,556 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:00:56,556 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:00:56,559 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:00:56,559 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:00:56,562 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-20 08:00:56,566 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2020-10-20 08:00:56,566 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) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:56,579 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-20 08:00:56,580 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-20 08:00:56,580 INFO L510 LassoAnalysis]: Proved termination. [2020-10-20 08:00:56,581 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo1_#in~n) = 1*fibo1_#in~n Supporting invariants [] [2020-10-20 08:00:56,617 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-20 08:00:56,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:56,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:56,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-20 08:00:56,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:56,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:56,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-20 08:00:56,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:56,891 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 08:00:56,913 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 08:00:56,914 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 27 states. Second operand 6 states. [2020-10-20 08:00:57,188 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 08:00:57,189 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 08:00:57,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-20 08:00:57,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 21 transitions. [2020-10-20 08:00:57,195 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 21 transitions. Stem has 3 letters. Loop has 8 letters. [2020-10-20 08:00:57,196 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:00:57,196 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 21 transitions. Stem has 11 letters. Loop has 8 letters. [2020-10-20 08:00:57,197 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:00:57,197 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 21 transitions. Stem has 3 letters. Loop has 16 letters. [2020-10-20 08:00:57,197 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:00:57,198 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 85 states and 117 transitions. [2020-10-20 08:00:57,212 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2020-10-20 08:00:57,228 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 85 states to 61 states and 82 transitions. [2020-10-20 08:00:57,233 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 39 [2020-10-20 08:00:57,233 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 40 [2020-10-20 08:00:57,234 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 82 transitions. [2020-10-20 08:00:57,237 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 08:00:57,237 INFO L691 BuchiCegarLoop]: Abstraction has 61 states and 82 transitions. [2020-10-20 08:00:57,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states and 82 transitions. [2020-10-20 08:00:57,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 54. [2020-10-20 08:00:57,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-20 08:00:57,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 72 transitions. [2020-10-20 08:00:57,295 INFO L714 BuchiCegarLoop]: Abstraction has 54 states and 72 transitions. [2020-10-20 08:00:57,295 INFO L594 BuchiCegarLoop]: Abstraction has 54 states and 72 transitions. [2020-10-20 08:00:57,296 INFO L427 BuchiCegarLoop]: ======== Iteration 2============ [2020-10-20 08:00:57,296 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 54 states and 72 transitions. [2020-10-20 08:00:57,300 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2020-10-20 08:00:57,300 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 08:00:57,301 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 08:00:57,303 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 08:00:57,304 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 08:00:57,304 INFO L794 eck$LassoCheckResult]: Stem: 234#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(18);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 230#L-1 havoc main_#res;havoc main_#t~ret11, main_~x~0, main_~result~0;main_~x~0 := 8; 216#L39 call main_#t~ret11 := fibo1(main_~x~0);< 222#fibo1ENTRY ~n := #in~n; 215#L10 assume !(~n < 1); 217#L12 assume !(1 == ~n); 201#L15 call #t~ret7 := fibo2(~n - 1);< 233#fibo2ENTRY ~n := #in~n; 237#L20 assume !(~n < 1); 251#L22 assume !(1 == ~n); 212#L25 call #t~ret9 := fibo1(~n - 1);< 227#fibo1ENTRY ~n := #in~n; 211#L10 assume ~n < 1;#res := 0; 213#fibo1FINAL assume true; 220#fibo1EXIT >#48#return; 221#L25-1 [2020-10-20 08:00:57,305 INFO L796 eck$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 08:00:57,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:57,306 INFO L82 PathProgramCache]: Analyzing trace with hash -722660232, now seen corresponding path program 1 times [2020-10-20 08:00:57,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:00:57,307 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567570988] [2020-10-20 08:00:57,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:00:57,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:57,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-20 08:00:57,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:57,515 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 08:00:57,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567570988] [2020-10-20 08:00:57,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 08:00:57,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-20 08:00:57,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967201217] [2020-10-20 08:00:57,521 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-20 08:00:57,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:57,522 INFO L82 PathProgramCache]: Analyzing trace with hash -880179458, now seen corresponding path program 1 times [2020-10-20 08:00:57,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:00:57,523 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247173112] [2020-10-20 08:00:57,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:00:57,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:57,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-20 08:00:57,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:57,608 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-20 08:00:57,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247173112] [2020-10-20 08:00:57,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 08:00:57,609 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-20 08:00:57,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405497373] [2020-10-20 08:00:57,614 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-10-20 08:00:57,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 08:00:57,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-20 08:00:57,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-20 08:00:57,623 INFO L87 Difference]: Start difference. First operand 54 states and 72 transitions. cyclomatic complexity: 20 Second operand 6 states. [2020-10-20 08:00:57,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 08:00:57,724 INFO L93 Difference]: Finished difference Result 68 states and 88 transitions. [2020-10-20 08:00:57,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-20 08:00:57,726 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 68 states and 88 transitions. [2020-10-20 08:00:57,729 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2020-10-20 08:00:57,732 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 68 states to 66 states and 86 transitions. [2020-10-20 08:00:57,732 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 46 [2020-10-20 08:00:57,733 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 46 [2020-10-20 08:00:57,733 INFO L73 IsDeterministic]: Start isDeterministic. Operand 66 states and 86 transitions. [2020-10-20 08:00:57,733 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 08:00:57,733 INFO L691 BuchiCegarLoop]: Abstraction has 66 states and 86 transitions. [2020-10-20 08:00:57,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states and 86 transitions. [2020-10-20 08:00:57,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 58. [2020-10-20 08:00:57,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-20 08:00:57,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 76 transitions. [2020-10-20 08:00:57,742 INFO L714 BuchiCegarLoop]: Abstraction has 58 states and 76 transitions. [2020-10-20 08:00:57,742 INFO L594 BuchiCegarLoop]: Abstraction has 58 states and 76 transitions. [2020-10-20 08:00:57,742 INFO L427 BuchiCegarLoop]: ======== Iteration 3============ [2020-10-20 08:00:57,742 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 58 states and 76 transitions. [2020-10-20 08:00:57,744 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2020-10-20 08:00:57,744 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 08:00:57,744 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 08:00:57,745 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 08:00:57,745 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 08:00:57,746 INFO L794 eck$LassoCheckResult]: Stem: 375#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(18);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 374#L-1 havoc main_#res;havoc main_#t~ret11, main_~x~0, main_~result~0;main_~x~0 := 8; 355#L39 call main_#t~ret11 := fibo1(main_~x~0);< 364#fibo1ENTRY ~n := #in~n; 354#L10 assume !(~n < 1); 356#L12 assume !(1 == ~n); 346#L15 call #t~ret7 := fibo2(~n - 1);< 378#fibo2ENTRY ~n := #in~n; 399#L20 assume !(~n < 1); 400#L22 assume !(1 == ~n); 352#L25 call #t~ret9 := fibo1(~n - 1);< 371#fibo1ENTRY ~n := #in~n; 351#L10 assume !(~n < 1); 353#L12 assume 1 == ~n;#res := 1; 372#fibo1FINAL assume true; 365#fibo1EXIT >#48#return; 366#L25-1 [2020-10-20 08:00:57,746 INFO L796 eck$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 08:00:57,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:57,746 INFO L82 PathProgramCache]: Analyzing trace with hash -927605802, now seen corresponding path program 1 times [2020-10-20 08:00:57,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:00:57,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917160209] [2020-10-20 08:00:57,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:00:57,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:57,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-20 08:00:57,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:57,876 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 08:00:57,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917160209] [2020-10-20 08:00:57,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470520759] [2020-10-20 08:00:57,880 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 08:00:57,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:57,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-20 08:00:57,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:57,984 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 08:00:57,985 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 08:00:57,985 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-20 08:00:57,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710844561] [2020-10-20 08:00:57,986 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-20 08:00:57,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:57,986 INFO L82 PathProgramCache]: Analyzing trace with hash -1515734512, now seen corresponding path program 1 times [2020-10-20 08:00:57,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:00:57,987 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287923600] [2020-10-20 08:00:57,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:00:57,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:00:57,995 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:00:58,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:00:58,009 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:00:58,014 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 08:00:58,183 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 08:00:58,184 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 08:00:58,184 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 08:00:58,184 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 08:00:58,184 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-20 08:00:58,184 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:58,184 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 08:00:58,184 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 08:00:58,184 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_8-2.c_Iteration3_Loop [2020-10-20 08:00:58,184 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 08:00:58,185 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 08:00:58,186 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 08:00:58,188 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 08:00:58,191 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 08:00:58,193 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 08:00:58,195 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 08:00:58,202 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 08:00:58,205 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 08:00:58,207 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 08:00:58,209 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 08:00:58,278 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 08:00:58,278 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 08:00:58,285 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:00:58,285 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 08:00:58,289 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:00:58,290 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) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:58,316 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:00:58,316 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:00:58,320 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:00:58,321 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 08:00:58,344 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:00:58,344 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:00:58,346 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:00:58,347 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 08:00:58,368 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:00:58,368 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:00:58,371 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:00:58,371 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 08:00:58,392 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:00:58,392 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 08:00:58,417 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-20 08:00:58,418 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:00:58,976 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-20 08:00:58,978 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 08:00:58,978 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 08:00:58,978 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 08:00:58,978 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 08:00:58,978 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-20 08:00:58,979 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:58,979 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 08:00:58,979 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 08:00:58,979 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_8-2.c_Iteration3_Loop [2020-10-20 08:00:58,979 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 08:00:58,979 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 08:00:58,981 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 08:00:58,984 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 08:00:58,987 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 08:00:58,989 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 08:00:58,996 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 08:00:58,998 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 08:00:59,000 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 08:00:59,005 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 08:00:59,009 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 08:00:59,078 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 08:00:59,078 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:59,081 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 08:00:59,082 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:00:59,082 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:00:59,083 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:00:59,083 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:00:59,083 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:00:59,083 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:00:59,083 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:00:59,085 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 08:00:59,107 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 08:00:59,109 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:00:59,109 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:00:59,109 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:00:59,109 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:00:59,109 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:00:59,124 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:00:59,124 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:00:59,125 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:59,149 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 08:00:59,151 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:00:59,151 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:00:59,151 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:00:59,151 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:00:59,151 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:00:59,152 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:00:59,152 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:00:59,154 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 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 08:00:59,178 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 08:00:59,179 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:00:59,179 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:00:59,179 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:00:59,179 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:00:59,179 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:00:59,182 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:00:59,182 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:00:59,185 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-20 08:00:59,189 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-20 08:00:59,189 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) Waiting until toolchain timeout for monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:59,192 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-20 08:00:59,192 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-20 08:00:59,192 INFO L510 LassoAnalysis]: Proved termination. [2020-10-20 08:00:59,192 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo2_~n) = 1*fibo2_~n Supporting invariants [] [2020-10-20 08:00:59,215 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-20 08:00:59,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:59,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:59,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-20 08:00:59,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:59,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:59,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-20 08:00:59,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:59,494 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 08:00:59,495 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 08:00:59,495 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 58 states and 76 transitions. cyclomatic complexity: 20 Second operand 10 states. [2020-10-20 08:01:00,029 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 08:01:00,031 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 08:01:00,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-10-20 08:01:00,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 73 transitions. [2020-10-20 08:01:00,032 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 73 transitions. Stem has 16 letters. Loop has 14 letters. [2020-10-20 08:01:00,033 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:00,033 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 73 transitions. Stem has 30 letters. Loop has 14 letters. [2020-10-20 08:01:00,034 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:00,034 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 73 transitions. Stem has 16 letters. Loop has 28 letters. [2020-10-20 08:01:00,035 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:00,035 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 191 states and 263 transitions. [2020-10-20 08:01:00,042 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 20 [2020-10-20 08:01:00,048 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 191 states to 169 states and 237 transitions. [2020-10-20 08:01:00,048 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 103 [2020-10-20 08:01:00,049 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 106 [2020-10-20 08:01:00,049 INFO L73 IsDeterministic]: Start isDeterministic. Operand 169 states and 237 transitions. [2020-10-20 08:01:00,050 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 08:01:00,050 INFO L691 BuchiCegarLoop]: Abstraction has 169 states and 237 transitions. [2020-10-20 08:01:00,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states and 237 transitions. [2020-10-20 08:01:00,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 152. [2020-10-20 08:01:00,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-10-20 08:01:00,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 206 transitions. [2020-10-20 08:01:00,068 INFO L714 BuchiCegarLoop]: Abstraction has 152 states and 206 transitions. [2020-10-20 08:01:00,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 08:01:00,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-20 08:01:00,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-20 08:01:00,069 INFO L87 Difference]: Start difference. First operand 152 states and 206 transitions. Second operand 10 states. [2020-10-20 08:01:00,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 08:01:00,252 INFO L93 Difference]: Finished difference Result 183 states and 244 transitions. [2020-10-20 08:01:00,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-20 08:01:00,255 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 183 states and 244 transitions. [2020-10-20 08:01:00,262 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 20 [2020-10-20 08:01:00,272 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 183 states to 180 states and 240 transitions. [2020-10-20 08:01:00,274 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 117 [2020-10-20 08:01:00,275 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 117 [2020-10-20 08:01:00,275 INFO L73 IsDeterministic]: Start isDeterministic. Operand 180 states and 240 transitions. [2020-10-20 08:01:00,275 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 08:01:00,276 INFO L691 BuchiCegarLoop]: Abstraction has 180 states and 240 transitions. [2020-10-20 08:01:00,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states and 240 transitions. [2020-10-20 08:01:00,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 167. [2020-10-20 08:01:00,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-20 08:01:00,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 225 transitions. [2020-10-20 08:01:00,312 INFO L714 BuchiCegarLoop]: Abstraction has 167 states and 225 transitions. [2020-10-20 08:01:00,312 INFO L594 BuchiCegarLoop]: Abstraction has 167 states and 225 transitions. [2020-10-20 08:01:00,312 INFO L427 BuchiCegarLoop]: ======== Iteration 4============ [2020-10-20 08:01:00,313 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 167 states and 225 transitions. [2020-10-20 08:01:00,315 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 20 [2020-10-20 08:01:00,315 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 08:01:00,315 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 08:01:00,324 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 08:01:00,324 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 08:01:00,325 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 := 8; 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~ret8;havoc #t~ret7; 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~ret8;havoc #t~ret7; 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~ret8;havoc #t~ret7; 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 08:01:00,325 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~ret8;havoc #t~ret7; 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~ret8;havoc #t~ret7; 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 08:01:00,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:00,326 INFO L82 PathProgramCache]: Analyzing trace with hash -1380034771, now seen corresponding path program 1 times [2020-10-20 08:01:00,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:01:00,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373331908] [2020-10-20 08:01:00,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:01:00,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:00,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-20 08:01:00,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:00,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 08:01:00,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:00,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 08:01:00,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:00,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-20 08:01:00,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:00,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 08:01:00,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:00,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-20 08:01:00,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:00,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 08:01:00,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:00,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-20 08:01:00,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:00,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-20 08:01:00,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:00,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 08:01:00,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:00,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-20 08:01:00,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:00,651 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 25 proven. 25 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2020-10-20 08:01:00,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373331908] [2020-10-20 08:01:00,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195384729] [2020-10-20 08:01:00,652 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 08:01:00,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:00,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-20 08:01:00,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:00,948 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 08:01:00,948 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 08:01:00,948 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 13] total 17 [2020-10-20 08:01:00,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320318036] [2020-10-20 08:01:00,949 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-20 08:01:00,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:00,950 INFO L82 PathProgramCache]: Analyzing trace with hash -1411437133, now seen corresponding path program 1 times [2020-10-20 08:01:00,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:01:00,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600498986] [2020-10-20 08:01:00,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:01:00,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:00,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-20 08:01:00,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:00,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 08:01:00,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:01,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 08:01:01,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:01,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-20 08:01:01,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:01,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-20 08:01:01,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:01,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 08:01:01,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:01,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-20 08:01:01,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:01,047 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 08:01:01,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600498986] [2020-10-20 08:01:01,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961935570] [2020-10-20 08:01:01,048 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 08:01:01,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:01,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-20 08:01:01,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:01,181 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 08:01:01,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 08:01:01,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9] total 12 [2020-10-20 08:01:01,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788339502] [2020-10-20 08:01:01,182 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-10-20 08:01:01,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 08:01:01,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-20 08:01:01,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-20 08:01:01,183 INFO L87 Difference]: Start difference. First operand 167 states and 225 transitions. cyclomatic complexity: 63 Second operand 12 states. [2020-10-20 08:01:01,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 08:01:01,515 INFO L93 Difference]: Finished difference Result 223 states and 293 transitions. [2020-10-20 08:01:01,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-20 08:01:01,516 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 223 states and 293 transitions. [2020-10-20 08:01:01,524 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 20 [2020-10-20 08:01:01,534 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 223 states to 200 states and 262 transitions. [2020-10-20 08:01:01,534 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 134 [2020-10-20 08:01:01,535 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 134 [2020-10-20 08:01:01,535 INFO L73 IsDeterministic]: Start isDeterministic. Operand 200 states and 262 transitions. [2020-10-20 08:01:01,536 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 08:01:01,536 INFO L691 BuchiCegarLoop]: Abstraction has 200 states and 262 transitions. [2020-10-20 08:01:01,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states and 262 transitions. [2020-10-20 08:01:01,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 184. [2020-10-20 08:01:01,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-10-20 08:01:01,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 238 transitions. [2020-10-20 08:01:01,554 INFO L714 BuchiCegarLoop]: Abstraction has 184 states and 238 transitions. [2020-10-20 08:01:01,554 INFO L594 BuchiCegarLoop]: Abstraction has 184 states and 238 transitions. [2020-10-20 08:01:01,554 INFO L427 BuchiCegarLoop]: ======== Iteration 5============ [2020-10-20 08:01:01,554 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 184 states and 238 transitions. [2020-10-20 08:01:01,556 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 20 [2020-10-20 08:01:01,557 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 08:01:01,557 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 08:01:01,558 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 08:01:01,558 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 08:01:01,559 INFO L794 eck$LassoCheckResult]: Stem: 2329#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); 2319#L-1 havoc main_#res;havoc main_#t~ret11, main_~x~0, main_~result~0;main_~x~0 := 8; 2301#L39 call main_#t~ret11 := fibo1(main_~x~0);< 2302#fibo1ENTRY ~n := #in~n; 2364#L10 assume !(~n < 1); 2318#L12 assume !(1 == ~n); 2282#L15 call #t~ret7 := fibo2(~n - 1);< 2322#fibo2ENTRY ~n := #in~n; 2413#L20 assume !(~n < 1); 2281#L22 assume !(1 == ~n); 2283#L25 call #t~ret9 := fibo1(~n - 1);< 2311#fibo1ENTRY ~n := #in~n; 2350#L10 assume !(~n < 1); 2348#L12 assume !(1 == ~n); 2265#L15 call #t~ret7 := fibo2(~n - 1);< 2344#fibo2ENTRY ~n := #in~n; 2367#L20 assume !(~n < 1); 2366#L22 assume !(1 == ~n); 2336#L25 call #t~ret9 := fibo1(~n - 1);< 2311#fibo1ENTRY ~n := #in~n; 2353#L10 assume !(~n < 1); 2377#L12 assume 1 == ~n;#res := 1; 2378#fibo1FINAL assume true; 2444#fibo1EXIT >#48#return; 2291#L25-1 call #t~ret10 := fibo1(~n - 2);< 2314#fibo1ENTRY ~n := #in~n; 2290#L10 assume ~n < 1;#res := 0; 2292#fibo1FINAL assume true; 2447#fibo1EXIT >#50#return; 2264#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret10;havoc #t~ret9; 2267#fibo2FINAL assume true; 2387#fibo2EXIT >#52#return; 2286#L15-1 [2020-10-20 08:01:01,559 INFO L796 eck$LassoCheckResult]: Loop: 2286#L15-1 call #t~ret8 := fibo2(~n - 2);< 2335#fibo2ENTRY ~n := #in~n; 2414#L20 assume !(~n < 1); 2415#L22 assume !(1 == ~n); 2394#L25 call #t~ret9 := fibo1(~n - 1);< 2403#fibo1ENTRY ~n := #in~n; 2408#L10 assume !(~n < 1); 2406#L12 assume !(1 == ~n); 2287#L15 call #t~ret7 := fibo2(~n - 1);< 2335#fibo2ENTRY ~n := #in~n; 2414#L20 assume !(~n < 1); 2415#L22 assume 1 == ~n;#res := 1; 2284#fibo2FINAL assume true; 2288#fibo2EXIT >#52#return; 2286#L15-1 [2020-10-20 08:01:01,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:01,559 INFO L82 PathProgramCache]: Analyzing trace with hash -658151768, now seen corresponding path program 1 times [2020-10-20 08:01:01,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:01:01,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259932758] [2020-10-20 08:01:01,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:01:01,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:01,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-20 08:01:01,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:01,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 08:01:01,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:01,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-20 08:01:01,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:01,757 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 08:01:01,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259932758] [2020-10-20 08:01:01,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020881938] [2020-10-20 08:01:01,758 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 08:01:01,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:01,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-20 08:01:01,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:01,882 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 08:01:01,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 08:01:01,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2020-10-20 08:01:01,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153026510] [2020-10-20 08:01:01,884 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-20 08:01:01,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:01,886 INFO L82 PathProgramCache]: Analyzing trace with hash -815837104, now seen corresponding path program 1 times [2020-10-20 08:01:01,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:01:01,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632026877] [2020-10-20 08:01:01,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:01:01,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:01:01,891 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:01:01,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:01:01,896 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:01:01,910 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 08:01:02,091 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 08:01:02,091 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 08:01:02,091 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 08:01:02,092 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 08:01:02,092 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-20 08:01:02,092 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:02,092 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 08:01:02,092 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 08:01:02,092 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_8-2.c_Iteration5_Loop [2020-10-20 08:01:02,093 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 08:01:02,093 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 08:01:02,094 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 08:01:02,097 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 08:01:02,100 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 08:01:02,102 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 08:01:02,104 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 08:01:02,113 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 08:01:02,120 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 08:01:02,121 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 08:01:02,129 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 08:01:02,184 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 08:01:02,184 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:02,192 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:01:02,192 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:01:02,198 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:01:02,198 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 38 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:02,220 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:01:02,220 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:01:02,223 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:01:02,223 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 39 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:02,257 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:01:02,257 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:01:02,260 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:01:02,260 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#t~ret7=1} Honda state: {fibo1_#t~ret7=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:02,285 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:01:02,285 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:01:02,288 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:01:02,288 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 41 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:02,310 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:01:02,310 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:01:02,312 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:01:02,312 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 42 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:02,335 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:01:02,336 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:02,359 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-20 08:01:02,359 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:01:02,970 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-20 08:01:02,972 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 08:01:02,973 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 08:01:02,973 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 08:01:02,973 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 08:01:02,973 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-20 08:01:02,973 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:02,973 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 08:01:02,973 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 08:01:02,973 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_8-2.c_Iteration5_Loop [2020-10-20 08:01:02,973 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 08:01:02,973 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 08:01:02,974 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 08:01:02,977 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 08:01:02,979 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 08:01:02,984 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 08:01:02,986 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 08:01:02,989 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 08:01:02,996 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 08:01:03,002 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 08:01:03,010 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 08:01:03,061 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 08:01:03,061 INFO L489 LassoAnalysis]: Using template 'affine'. 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 08:01:03,075 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 08:01:03,077 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:03,077 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:03,077 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:03,078 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:03,078 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:03,078 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:03,078 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 08:01:03,082 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) Waiting until toolchain timeout for monitored process 45 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:03,107 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 08:01:03,109 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:03,109 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:03,109 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:03,109 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:03,109 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:03,110 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:03,110 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:03,111 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 46 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:03,132 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 08:01:03,133 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:03,133 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:03,133 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:03,133 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:03,133 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:03,134 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:03,134 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:03,136 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 47 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:01:03,159 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 08:01:03,160 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:03,160 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:03,161 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:03,161 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:03,161 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:03,161 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:03,161 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 47 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:03,164 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 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 08:01:03,186 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 08:01:03,188 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:03,188 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:03,188 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:03,188 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:03,188 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:03,188 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:03,188 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:03,190 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 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 08:01:03,213 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 08:01:03,214 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:03,214 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:03,214 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:03,214 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:03,214 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:03,215 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:03,215 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:03,218 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 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 08:01:03,241 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 08:01:03,242 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:03,242 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:03,242 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:03,243 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:03,243 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:03,243 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:03,243 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:03,245 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:03,268 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 08:01:03,269 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:03,270 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:03,270 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:03,270 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:03,270 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:03,271 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:03,271 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:03,274 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-20 08:01:03,276 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-20 08:01:03,277 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 52 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:01:03,283 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-20 08:01:03,284 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-20 08:01:03,284 INFO L510 LassoAnalysis]: Proved termination. [2020-10-20 08:01:03,284 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo1_~n) = 1*fibo1_~n Supporting invariants [] Waiting until toolchain timeout for monitored process 52 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:03,318 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-20 08:01:03,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:03,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:03,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-20 08:01:03,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:03,431 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:03,440 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:03,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:03,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-20 08:01:03,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:03,560 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 08:01:03,560 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 08:01:03,561 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 184 states and 238 transitions. cyclomatic complexity: 59 Second operand 10 states. [2020-10-20 08:01:04,056 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 184 states and 238 transitions. cyclomatic complexity: 59. Second operand 10 states. Result 717 states and 936 transitions. Complement of second has 40 states. [2020-10-20 08:01:04,059 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 08:01:04,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-10-20 08:01:04,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 69 transitions. [2020-10-20 08:01:04,060 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 69 transitions. Stem has 32 letters. Loop has 14 letters. [2020-10-20 08:01:04,061 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:04,061 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 69 transitions. Stem has 46 letters. Loop has 14 letters. [2020-10-20 08:01:04,062 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:04,064 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 69 transitions. Stem has 32 letters. Loop has 28 letters. [2020-10-20 08:01:04,067 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:04,068 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 717 states and 936 transitions. [2020-10-20 08:01:04,085 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 40 [2020-10-20 08:01:04,100 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 717 states to 646 states and 859 transitions. [2020-10-20 08:01:04,100 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 301 [2020-10-20 08:01:04,103 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 308 [2020-10-20 08:01:04,104 INFO L73 IsDeterministic]: Start isDeterministic. Operand 646 states and 859 transitions. [2020-10-20 08:01:04,109 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 08:01:04,109 INFO L691 BuchiCegarLoop]: Abstraction has 646 states and 859 transitions. [2020-10-20 08:01:04,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states and 859 transitions. [2020-10-20 08:01:04,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 625. [2020-10-20 08:01:04,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 625 states. [2020-10-20 08:01:04,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 829 transitions. [2020-10-20 08:01:04,173 INFO L714 BuchiCegarLoop]: Abstraction has 625 states and 829 transitions. [2020-10-20 08:01:04,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 08:01:04,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-20 08:01:04,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2020-10-20 08:01:04,174 INFO L87 Difference]: Start difference. First operand 625 states and 829 transitions. Second operand 15 states. [2020-10-20 08:01:04,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 08:01:04,483 INFO L93 Difference]: Finished difference Result 677 states and 901 transitions. [2020-10-20 08:01:04,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-20 08:01:04,484 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 677 states and 901 transitions. [2020-10-20 08:01:04,493 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 40 [2020-10-20 08:01:04,501 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 677 states to 674 states and 897 transitions. [2020-10-20 08:01:04,502 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 322 [2020-10-20 08:01:04,502 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 322 [2020-10-20 08:01:04,502 INFO L73 IsDeterministic]: Start isDeterministic. Operand 674 states and 897 transitions. [2020-10-20 08:01:04,503 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 08:01:04,503 INFO L691 BuchiCegarLoop]: Abstraction has 674 states and 897 transitions. [2020-10-20 08:01:04,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states and 897 transitions. [2020-10-20 08:01:04,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 635. [2020-10-20 08:01:04,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 635 states. [2020-10-20 08:01:04,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 838 transitions. [2020-10-20 08:01:04,526 INFO L714 BuchiCegarLoop]: Abstraction has 635 states and 838 transitions. [2020-10-20 08:01:04,526 INFO L594 BuchiCegarLoop]: Abstraction has 635 states and 838 transitions. [2020-10-20 08:01:04,526 INFO L427 BuchiCegarLoop]: ======== Iteration 6============ [2020-10-20 08:01:04,527 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 635 states and 838 transitions. [2020-10-20 08:01:04,531 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 40 [2020-10-20 08:01:04,532 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 08:01:04,532 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 08:01:04,533 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 08:01:04,533 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 08:01:04,533 INFO L794 eck$LassoCheckResult]: Stem: 4883#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); 4882#L-1 havoc main_#res;havoc main_#t~ret11, main_~x~0, main_~result~0;main_~x~0 := 8; 4854#L39 call main_#t~ret11 := fibo1(main_~x~0);< 4855#fibo1ENTRY ~n := #in~n; 5175#L10 assume !(~n < 1); 5174#L12 assume !(1 == ~n); 4899#L15 call #t~ret7 := fibo2(~n - 1);< 5170#fibo2ENTRY ~n := #in~n; 5159#L20 assume !(~n < 1); 5157#L22 assume !(1 == ~n); 5144#L25 call #t~ret9 := fibo1(~n - 1);< 5154#fibo1ENTRY ~n := #in~n; 5152#L10 assume !(~n < 1); 5149#L12 assume !(1 == ~n); 4924#L15 call #t~ret7 := fibo2(~n - 1);< 5015#fibo2ENTRY ~n := #in~n; 5138#L20 assume !(~n < 1); 5066#L22 assume !(1 == ~n); 4862#L25 call #t~ret9 := fibo1(~n - 1);< 5032#fibo1ENTRY ~n := #in~n; 5033#L10 assume !(~n < 1); 5118#L12 assume !(1 == ~n); 4999#L15 call #t~ret7 := fibo2(~n - 1);< 5004#fibo2ENTRY ~n := #in~n; 4998#L20 assume !(~n < 1); 5000#L22 assume 1 == ~n;#res := 1; 5369#fibo2FINAL assume true; 5367#fibo2EXIT >#52#return; 4985#L15-1 call #t~ret8 := fibo2(~n - 2);< 4995#fibo2ENTRY ~n := #in~n; 4990#L20 assume ~n < 1;#res := 0; 4984#fibo2FINAL assume true; 4986#fibo2EXIT >#54#return; 4978#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 4979#fibo1FINAL assume true; 4943#fibo1EXIT >#48#return; 4915#L25-1 call #t~ret10 := fibo1(~n - 2);< 4926#fibo1ENTRY ~n := #in~n; 5451#L10 assume ~n < 1;#res := 0; 5450#fibo1FINAL assume true; 5446#fibo1EXIT >#50#return; 5432#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret10;havoc #t~ret9; 5428#fibo2FINAL assume true; 5426#fibo2EXIT >#52#return; 4868#L15-1 call #t~ret8 := fibo2(~n - 2);< 4889#fibo2ENTRY [2020-10-20 08:01:04,534 INFO L796 eck$LassoCheckResult]: Loop: 4889#fibo2ENTRY ~n := #in~n; 4948#L20 assume !(~n < 1); 4904#L22 assume !(1 == ~n); 4867#L25 call #t~ret9 := fibo1(~n - 1);< 4872#fibo1ENTRY ~n := #in~n; 5385#L10 assume !(~n < 1); 5383#L12 assume !(1 == ~n); 4870#L15 call #t~ret7 := fibo2(~n - 1);< 4889#fibo2ENTRY [2020-10-20 08:01:04,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:04,534 INFO L82 PathProgramCache]: Analyzing trace with hash 1560322136, now seen corresponding path program 1 times [2020-10-20 08:01:04,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:01:04,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431584994] [2020-10-20 08:01:04,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:01:04,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:04,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-20 08:01:04,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:04,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 08:01:04,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:04,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 08:01:04,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:04,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-20 08:01:04,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:04,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-20 08:01:04,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:04,616 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-20 08:01:04,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431584994] [2020-10-20 08:01:04,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951295233] [2020-10-20 08:01:04,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [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 125 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-20 08:01:04,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:04,816 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 3 proven. 34 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-20 08:01:04,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 08:01:04,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 14] total 19 [2020-10-20 08:01:04,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752352897] [2020-10-20 08:01:04,820 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-20 08:01:04,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:04,821 INFO L82 PathProgramCache]: Analyzing trace with hash 996300776, now seen corresponding path program 2 times [2020-10-20 08:01:04,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:01:04,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835052076] [2020-10-20 08:01:04,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:01:04,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:01:04,824 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:01:04,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:01:04,826 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:01:04,827 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 08:01:04,924 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 08:01:04,924 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 08:01:04,924 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 08:01:04,924 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 08:01:04,924 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-20 08:01:04,924 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:04,925 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 08:01:04,925 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 08:01:04,925 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_8-2.c_Iteration6_Loop [2020-10-20 08:01:04,925 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 08:01:04,925 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 08:01:04,926 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 08:01:04,932 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 08:01:04,934 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 08:01:04,936 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 08:01:04,938 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 08:01:04,940 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 08:01:04,941 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 08:01:04,943 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 08:01:04,951 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 08:01:04,959 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:05,006 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 08:01:05,006 INFO L404 LassoAnalysis]: Checking for nontermination... 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) [2020-10-20 08:01:05,016 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:01:05,016 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 54 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:05,019 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:01:05,020 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 55 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:01:05,057 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:01:05,057 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 08:01:05,060 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:01:05,060 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 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 08:01:05,089 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:01:05,089 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:01:05,091 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:01:05,091 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 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 08:01:05,116 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:01:05,116 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:01:05,119 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:01:05,119 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 58 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:01:05,141 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:01:05,141 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 58 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:05,144 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:01:05,144 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 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 08:01:05,168 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:01:05,168 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:01:05,171 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:01:05,171 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 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 08:01:05,195 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:01:05,195 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:01:05,197 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:01:05,197 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 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 08:01:05,221 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:01:05,221 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:01:05,223 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:01:05,223 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 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 08:01:05,245 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:01:05,246 INFO L160 nArgumentSynthesizer]: Using integer mode. 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) Waiting until toolchain timeout for monitored process 63 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:05,271 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-20 08:01:05,271 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:01:05,324 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-20 08:01:05,326 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 08:01:05,326 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 08:01:05,326 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 08:01:05,326 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 08:01:05,326 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-20 08:01:05,326 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:05,326 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 08:01:05,326 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 08:01:05,327 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_8-2.c_Iteration6_Loop [2020-10-20 08:01:05,327 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 08:01:05,327 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 08:01:05,328 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 08:01:05,330 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 08:01:05,332 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 08:01:05,333 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 08:01:05,335 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 08:01:05,337 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 08:01:05,339 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 08:01:05,342 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 08:01:05,344 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 08:01:05,346 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 08:01:05,408 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 08:01:05,408 INFO L489 LassoAnalysis]: Using template 'affine'. 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 08:01:05,414 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 08:01:05,416 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:05,416 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:05,416 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:05,416 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:05,416 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:05,417 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:05,417 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:05,418 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 65 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 65 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:05,441 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 08:01:05,442 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:05,442 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:05,442 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:05,442 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:05,442 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:05,443 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:05,443 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:05,445 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 66 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 66 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:05,467 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 08:01:05,469 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:05,469 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:05,469 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:05,469 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:05,469 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:05,470 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:05,470 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:05,471 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 67 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 67 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:05,492 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 08:01:05,494 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:05,494 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:05,494 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:05,494 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:05,495 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:05,495 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:05,495 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:05,496 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 68 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 68 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:05,519 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 08:01:05,520 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:05,520 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:05,520 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:05,520 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:05,520 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:05,521 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:05,521 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:05,522 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 69 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 69 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:05,543 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 08:01:05,545 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:05,545 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:05,545 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:05,545 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:05,545 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:05,545 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:05,546 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:05,547 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 70 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 70 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:05,568 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 08:01:05,569 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:05,569 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:05,570 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:05,570 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:05,570 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:05,570 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:05,570 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:05,571 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 71 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 71 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:05,595 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 08:01:05,597 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:05,597 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:05,597 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:05,597 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:05,597 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:05,598 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:05,598 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:05,599 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 72 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 72 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:05,622 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 08:01:05,624 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:05,624 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:05,624 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:05,624 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:05,624 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:05,625 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:05,625 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:05,627 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 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 08:01:05,648 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 08:01:05,650 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:05,650 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:05,650 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:05,650 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:05,650 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:05,651 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:05,651 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:05,653 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-20 08:01:05,654 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2020-10-20 08:01:05,654 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 74 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:01:05,674 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-20 08:01:05,675 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-20 08:01:05,675 INFO L510 LassoAnalysis]: Proved termination. [2020-10-20 08:01:05,675 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 74 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:05,708 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-20 08:01:05,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:05,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:05,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-20 08:01:05,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:05,793 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:05,796 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:05,798 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:05,801 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:05,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:05,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-20 08:01:05,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:05,892 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 08:01:05,893 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 08:01:05,893 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 635 states and 838 transitions. cyclomatic complexity: 220 Second operand 7 states. [2020-10-20 08:01:06,068 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 635 states and 838 transitions. cyclomatic complexity: 220. Second operand 7 states. Result 947 states and 1222 transitions. Complement of second has 24 states. [2020-10-20 08:01:06,068 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 08:01:06,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-20 08:01:06,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 39 transitions. [2020-10-20 08:01:06,069 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 39 transitions. Stem has 45 letters. Loop has 8 letters. [2020-10-20 08:01:06,071 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:06,071 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-20 08:01:06,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:06,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:06,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-20 08:01:06,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:06,184 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:06,188 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:06,191 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:06,198 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:06,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:06,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-20 08:01:06,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:06,256 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 08:01:06,257 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 08:01:06,257 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 635 states and 838 transitions. cyclomatic complexity: 220 Second operand 7 states. [2020-10-20 08:01:06,427 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 635 states and 838 transitions. cyclomatic complexity: 220. Second operand 7 states. Result 947 states and 1222 transitions. Complement of second has 24 states. [2020-10-20 08:01:06,428 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 08:01:06,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-20 08:01:06,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 39 transitions. [2020-10-20 08:01:06,429 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 39 transitions. Stem has 45 letters. Loop has 8 letters. [2020-10-20 08:01:06,429 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:06,429 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-20 08:01:06,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:06,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:06,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-20 08:01:06,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:06,519 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:06,522 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:06,524 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:06,527 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:06,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:06,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-20 08:01:06,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:06,582 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 08:01:06,583 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 08:01:06,583 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 635 states and 838 transitions. cyclomatic complexity: 220 Second operand 7 states. [2020-10-20 08:01:06,793 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 635 states and 838 transitions. cyclomatic complexity: 220. Second operand 7 states. Result 1303 states and 1629 transitions. Complement of second has 23 states. [2020-10-20 08:01:06,794 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 08:01:06,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-20 08:01:06,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 43 transitions. [2020-10-20 08:01:06,795 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 43 transitions. Stem has 45 letters. Loop has 8 letters. [2020-10-20 08:01:06,795 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:06,796 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 43 transitions. Stem has 53 letters. Loop has 8 letters. [2020-10-20 08:01:06,796 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:06,796 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 43 transitions. Stem has 45 letters. Loop has 16 letters. [2020-10-20 08:01:06,797 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:06,797 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1303 states and 1629 transitions. [2020-10-20 08:01:06,812 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 88 [2020-10-20 08:01:06,825 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1303 states to 988 states and 1292 transitions. [2020-10-20 08:01:06,825 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 381 [2020-10-20 08:01:06,826 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 427 [2020-10-20 08:01:06,826 INFO L73 IsDeterministic]: Start isDeterministic. Operand 988 states and 1292 transitions. [2020-10-20 08:01:06,827 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 08:01:06,827 INFO L691 BuchiCegarLoop]: Abstraction has 988 states and 1292 transitions. [2020-10-20 08:01:06,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 988 states and 1292 transitions. [2020-10-20 08:01:06,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 988 to 899. [2020-10-20 08:01:06,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 899 states. [2020-10-20 08:01:06,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 1160 transitions. [2020-10-20 08:01:06,858 INFO L714 BuchiCegarLoop]: Abstraction has 899 states and 1160 transitions. [2020-10-20 08:01:06,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 08:01:06,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-20 08:01:06,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2020-10-20 08:01:06,862 INFO L87 Difference]: Start difference. First operand 899 states and 1160 transitions. Second operand 19 states. [2020-10-20 08:01:07,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 08:01:07,559 INFO L93 Difference]: Finished difference Result 1253 states and 1799 transitions. [2020-10-20 08:01:07,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-20 08:01:07,560 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1253 states and 1799 transitions. [2020-10-20 08:01:07,576 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 104 [2020-10-20 08:01:07,596 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1253 states to 1247 states and 1793 transitions. [2020-10-20 08:01:07,596 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 546 [2020-10-20 08:01:07,597 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 546 [2020-10-20 08:01:07,598 INFO L73 IsDeterministic]: Start isDeterministic. Operand 1247 states and 1793 transitions. [2020-10-20 08:01:07,598 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 08:01:07,598 INFO L691 BuchiCegarLoop]: Abstraction has 1247 states and 1793 transitions. [2020-10-20 08:01:07,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1247 states and 1793 transitions. [2020-10-20 08:01:07,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1247 to 1103. [2020-10-20 08:01:07,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1103 states. [2020-10-20 08:01:07,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1103 states to 1103 states and 1503 transitions. [2020-10-20 08:01:07,644 INFO L714 BuchiCegarLoop]: Abstraction has 1103 states and 1503 transitions. [2020-10-20 08:01:07,644 INFO L594 BuchiCegarLoop]: Abstraction has 1103 states and 1503 transitions. [2020-10-20 08:01:07,644 INFO L427 BuchiCegarLoop]: ======== Iteration 7============ [2020-10-20 08:01:07,645 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 1103 states and 1503 transitions. [2020-10-20 08:01:07,652 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 101 [2020-10-20 08:01:07,653 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 08:01:07,653 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 08:01:07,660 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 08:01:07,660 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 08:01:07,661 INFO L794 eck$LassoCheckResult]: Stem: 11730#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); 11729#L-1 havoc main_#res;havoc main_#t~ret11, main_~x~0, main_~result~0;main_~x~0 := 8; 11692#L39 call main_#t~ret11 := fibo1(main_~x~0);< 11693#fibo1ENTRY ~n := #in~n; 11814#L10 assume !(~n < 1); 11813#L12 assume !(1 == ~n); 11809#L15 call #t~ret7 := fibo2(~n - 1);< 11812#fibo2ENTRY ~n := #in~n; 11811#L20 assume !(~n < 1); 11810#L22 assume !(1 == ~n); 11805#L25 call #t~ret9 := fibo1(~n - 1);< 11808#fibo1ENTRY ~n := #in~n; 11807#L10 assume !(~n < 1); 11806#L12 assume !(1 == ~n); 11784#L15 call #t~ret7 := fibo2(~n - 1);< 11786#fibo2ENTRY ~n := #in~n; 11804#L20 assume !(~n < 1); 11800#L22 assume !(1 == ~n); 11781#L25 call #t~ret9 := fibo1(~n - 1);< 11794#fibo1ENTRY ~n := #in~n; 11795#L10 assume !(~n < 1); 11802#L12 assume !(1 == ~n); 11803#L15 call #t~ret7 := fibo2(~n - 1);< 12322#fibo2ENTRY ~n := #in~n; 12330#L20 assume !(~n < 1); 12327#L22 assume 1 == ~n;#res := 1; 12326#fibo2FINAL assume true; 12321#fibo2EXIT >#52#return; 12316#L15-1 call #t~ret8 := fibo2(~n - 2);< 12317#fibo2ENTRY ~n := #in~n; 12343#L20 assume ~n < 1;#res := 0; 12342#fibo2FINAL assume true; 12315#fibo2EXIT >#54#return; 12310#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 12307#fibo1FINAL assume true; 12304#fibo1EXIT >#48#return; 12290#L25-1 call #t~ret10 := fibo1(~n - 2);< 12294#fibo1ENTRY ~n := #in~n; 12295#L10 assume !(~n < 1); 12287#L12 assume !(1 == ~n); 11683#L15 call #t~ret7 := fibo2(~n - 1);< 12278#fibo2ENTRY ~n := #in~n; 12279#L20 assume !(~n < 1); 12264#L22 assume 1 == ~n;#res := 1; 12265#fibo2FINAL assume true; 12670#fibo2EXIT >#52#return; 11714#L15-1 [2020-10-20 08:01:07,662 INFO L796 eck$LassoCheckResult]: Loop: 11714#L15-1 call #t~ret8 := fibo2(~n - 2);< 12362#fibo2ENTRY ~n := #in~n; 11766#L20 assume !(~n < 1); 11767#L22 assume !(1 == ~n); 11713#L25 call #t~ret9 := fibo1(~n - 1);< 11715#fibo1ENTRY ~n := #in~n; 12297#L10 assume !(~n < 1); 12298#L12 assume !(1 == ~n); 11743#L15 call #t~ret7 := fibo2(~n - 1);< 11745#fibo2ENTRY ~n := #in~n; 11751#L20 assume !(~n < 1); 12722#L22 assume 1 == ~n;#res := 1; 12720#fibo2FINAL assume true; 12676#fibo2EXIT >#52#return; 11714#L15-1 [2020-10-20 08:01:07,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:07,663 INFO L82 PathProgramCache]: Analyzing trace with hash -663651953, now seen corresponding path program 1 times [2020-10-20 08:01:07,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:01:07,663 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250233980] [2020-10-20 08:01:07,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:01:07,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:07,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-20 08:01:07,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:07,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 08:01:07,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:07,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-20 08:01:07,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:07,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-20 08:01:07,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:07,820 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 12 proven. 39 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-20 08:01:07,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250233980] [2020-10-20 08:01:07,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064439496] [2020-10-20 08:01:07,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 08:01:07,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:07,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-20 08:01:07,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:07,917 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 27 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-20 08:01:07,918 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 08:01:07,918 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2020-10-20 08:01:07,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43073392] [2020-10-20 08:01:07,919 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-20 08:01:07,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:07,920 INFO L82 PathProgramCache]: Analyzing trace with hash -815837104, now seen corresponding path program 2 times [2020-10-20 08:01:07,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:01:07,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730830534] [2020-10-20 08:01:07,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:01:07,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:01:07,924 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:01:07,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:01:07,927 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:01:07,929 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 08:01:08,083 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 08:01:08,083 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 08:01:08,083 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 08:01:08,083 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 08:01:08,084 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-20 08:01:08,084 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:08,084 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 08:01:08,084 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 08:01:08,084 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_8-2.c_Iteration7_Loop [2020-10-20 08:01:08,084 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 08:01:08,085 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 08:01:08,086 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 08:01:08,089 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 08:01:08,092 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 08:01:08,094 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 08:01:08,095 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 08:01:08,097 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 08:01:08,100 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 08:01:08,107 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 08:01:08,109 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 08:01:08,171 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 08:01:08,171 INFO L404 LassoAnalysis]: Checking for nontermination... 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 08:01:08,174 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:01:08,175 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:01:08,177 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:01:08,177 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 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 08:01:08,200 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:01:08,200 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:01:08,202 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:01:08,202 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 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 08:01:08,225 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:01:08,225 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:01:08,227 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:01:08,227 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 79 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 79 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:08,250 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:01:08,250 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:01:08,252 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:01:08,252 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 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 08:01:08,275 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:01:08,275 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:01:08,278 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:01:08,278 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 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 08:01:08,301 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:01:08,301 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:01:08,303 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:01:08,303 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 82 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 82 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:08,326 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:01:08,327 INFO L160 nArgumentSynthesizer]: Using integer mode. 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 08:01:08,357 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-20 08:01:08,357 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:01:09,336 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-20 08:01:09,338 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 08:01:09,338 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 08:01:09,338 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 08:01:09,338 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 08:01:09,338 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-20 08:01:09,338 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:09,338 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 08:01:09,338 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 08:01:09,338 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_8-2.c_Iteration7_Loop [2020-10-20 08:01:09,339 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 08:01:09,339 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 08:01:09,339 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 08:01:09,343 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 08:01:09,345 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 08:01:09,347 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 08:01:09,349 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 08:01:09,351 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 08:01:09,359 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 08:01:09,363 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 08:01:09,365 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 08:01:09,419 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 08:01:09,419 INFO L489 LassoAnalysis]: Using template 'affine'. 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 08:01:09,422 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 08:01:09,423 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:09,424 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:09,424 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:09,424 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:09,424 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:09,424 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:09,425 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:09,426 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 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 08:01:09,449 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 08:01:09,450 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:09,450 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:09,450 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:09,451 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:09,451 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:09,451 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:09,451 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:09,452 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 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 08:01:09,478 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 08:01:09,479 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:09,479 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:09,479 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:09,480 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:09,480 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:09,480 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:09,480 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:09,482 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 87 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 87 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:09,503 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 08:01:09,504 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:09,504 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:09,504 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:09,504 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:09,504 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:09,505 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:09,505 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:09,506 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 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 88 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:09,528 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 08:01:09,529 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:09,530 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:09,530 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:09,530 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:09,530 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:09,530 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:09,530 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:09,532 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 89 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 89 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:09,553 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 08:01:09,555 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:09,555 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:09,555 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:09,555 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:09,555 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:09,556 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:09,556 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:09,558 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-20 08:01:09,561 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-20 08:01:09,561 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 90 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 90 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:09,563 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-20 08:01:09,563 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-20 08:01:09,563 INFO L510 LassoAnalysis]: Proved termination. [2020-10-20 08:01:09,563 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo1_~n) = 1*fibo1_~n Supporting invariants [] [2020-10-20 08:01:09,583 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-20 08:01:09,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:09,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:09,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-20 08:01:09,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:09,692 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:09,698 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:09,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:09,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-20 08:01:09,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:09,805 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 08:01:09,806 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 08:01:09,806 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 1103 states and 1503 transitions. cyclomatic complexity: 417 Second operand 10 states. [2020-10-20 08:01:10,258 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 1103 states and 1503 transitions. cyclomatic complexity: 417. Second operand 10 states. Result 1956 states and 2660 transitions. Complement of second has 40 states. [2020-10-20 08:01:10,259 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 08:01:10,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-10-20 08:01:10,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 67 transitions. [2020-10-20 08:01:10,260 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 67 transitions. Stem has 46 letters. Loop has 14 letters. [2020-10-20 08:01:10,261 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:10,261 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-20 08:01:10,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:10,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:10,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-20 08:01:10,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:10,354 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:10,357 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:10,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:10,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-20 08:01:10,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:10,497 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 08:01:10,498 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 08:01:10,498 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 1103 states and 1503 transitions. cyclomatic complexity: 417 Second operand 10 states. [2020-10-20 08:01:10,803 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 1103 states and 1503 transitions. cyclomatic complexity: 417. Second operand 10 states. Result 1734 states and 2285 transitions. Complement of second has 26 states. [2020-10-20 08:01:10,803 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 08:01:10,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-10-20 08:01:10,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 46 transitions. [2020-10-20 08:01:10,804 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 46 transitions. Stem has 46 letters. Loop has 14 letters. [2020-10-20 08:01:10,805 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:10,805 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-20 08:01:10,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:10,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:10,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-20 08:01:10,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:10,917 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:10,921 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:10,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:10,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-20 08:01:10,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:11,038 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 08:01:11,039 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 08:01:11,039 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 1103 states and 1503 transitions. cyclomatic complexity: 417 Second operand 10 states. [2020-10-20 08:01:11,526 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 1103 states and 1503 transitions. cyclomatic complexity: 417. Second operand 10 states. Result 5452 states and 7496 transitions. Complement of second has 124 states. [2020-10-20 08:01:11,527 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 08:01:11,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-10-20 08:01:11,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 72 transitions. [2020-10-20 08:01:11,529 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 72 transitions. Stem has 46 letters. Loop has 14 letters. [2020-10-20 08:01:11,529 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:11,530 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 72 transitions. Stem has 60 letters. Loop has 14 letters. [2020-10-20 08:01:11,531 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:11,531 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 72 transitions. Stem has 46 letters. Loop has 28 letters. [2020-10-20 08:01:11,534 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:11,534 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 5452 states and 7496 transitions. [2020-10-20 08:01:11,593 INFO L131 ngComponentsAnalysis]: Automaton has 6 accepting balls. 243 [2020-10-20 08:01:11,914 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 5452 states to 2913 states and 4140 transitions. [2020-10-20 08:01:11,914 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 787 [2020-10-20 08:01:11,917 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 929 [2020-10-20 08:01:11,917 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2913 states and 4140 transitions. [2020-10-20 08:01:11,917 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 08:01:11,917 INFO L691 BuchiCegarLoop]: Abstraction has 2913 states and 4140 transitions. [2020-10-20 08:01:11,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2913 states and 4140 transitions. [2020-10-20 08:01:12,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2913 to 2461. [2020-10-20 08:01:12,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2461 states. [2020-10-20 08:01:12,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2461 states to 2461 states and 3426 transitions. [2020-10-20 08:01:12,015 INFO L714 BuchiCegarLoop]: Abstraction has 2461 states and 3426 transitions. [2020-10-20 08:01:12,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 08:01:12,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-20 08:01:12,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2020-10-20 08:01:12,016 INFO L87 Difference]: Start difference. First operand 2461 states and 3426 transitions. Second operand 17 states. [2020-10-20 08:01:12,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 08:01:12,588 INFO L93 Difference]: Finished difference Result 3452 states and 5090 transitions. [2020-10-20 08:01:12,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-20 08:01:12,589 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 3452 states and 5090 transitions. [2020-10-20 08:01:12,642 INFO L131 ngComponentsAnalysis]: Automaton has 11 accepting balls. 341 [2020-10-20 08:01:12,697 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 3452 states to 3449 states and 5086 transitions. [2020-10-20 08:01:12,697 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 1086 [2020-10-20 08:01:12,700 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 1086 [2020-10-20 08:01:12,700 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3449 states and 5086 transitions. [2020-10-20 08:01:12,701 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 08:01:12,701 INFO L691 BuchiCegarLoop]: Abstraction has 3449 states and 5086 transitions. [2020-10-20 08:01:12,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3449 states and 5086 transitions. [2020-10-20 08:01:13,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3449 to 3231. [2020-10-20 08:01:13,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3231 states. [2020-10-20 08:01:13,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3231 states to 3231 states and 4807 transitions. [2020-10-20 08:01:13,141 INFO L714 BuchiCegarLoop]: Abstraction has 3231 states and 4807 transitions. [2020-10-20 08:01:13,141 INFO L594 BuchiCegarLoop]: Abstraction has 3231 states and 4807 transitions. [2020-10-20 08:01:13,141 INFO L427 BuchiCegarLoop]: ======== Iteration 8============ [2020-10-20 08:01:13,142 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 3231 states and 4807 transitions. [2020-10-20 08:01:13,163 INFO L131 ngComponentsAnalysis]: Automaton has 11 accepting balls. 340 [2020-10-20 08:01:13,163 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 08:01:13,164 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 08:01:13,165 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [6, 6, 6, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 08:01:13,166 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 08:01:13,166 INFO L794 eck$LassoCheckResult]: Stem: 28905#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); 28904#L-1 havoc main_#res;havoc main_#t~ret11, main_~x~0, main_~result~0;main_~x~0 := 8; 28851#L39 call main_#t~ret11 := fibo1(main_~x~0);< 28852#fibo1ENTRY ~n := #in~n; 29012#L10 assume !(~n < 1); 29011#L12 assume !(1 == ~n); 29007#L15 call #t~ret7 := fibo2(~n - 1);< 29010#fibo2ENTRY ~n := #in~n; 29009#L20 assume !(~n < 1); 29008#L22 assume !(1 == ~n); 29003#L25 call #t~ret9 := fibo1(~n - 1);< 29006#fibo1ENTRY ~n := #in~n; 29005#L10 assume !(~n < 1); 29004#L12 assume !(1 == ~n); 28998#L15 call #t~ret7 := fibo2(~n - 1);< 29002#fibo2ENTRY ~n := #in~n; 29001#L20 assume !(~n < 1); 29000#L22 assume !(1 == ~n); 28963#L25 call #t~ret9 := fibo1(~n - 1);< 28996#fibo1ENTRY ~n := #in~n; 28993#L10 assume !(~n < 1); 28978#L12 assume !(1 == ~n); 28968#L15 call #t~ret7 := fibo2(~n - 1);< 28987#fibo2ENTRY ~n := #in~n; 28985#L20 assume !(~n < 1); 28981#L22 assume 1 == ~n;#res := 1; 28982#fibo2FINAL assume true; 28967#fibo2EXIT >#52#return; 28961#L15-1 call #t~ret8 := fibo2(~n - 2);< 28964#fibo2ENTRY ~n := #in~n; 29013#L20 assume !(~n < 1); 29014#L22 assume !(1 == ~n); 28947#L25 call #t~ret9 := fibo1(~n - 1);< 28946#fibo1ENTRY ~n := #in~n; 28948#L10 assume !(~n < 1); 28977#L12 assume !(1 == ~n); 28966#L15 call #t~ret7 := fibo2(~n - 1);< 28969#fibo2ENTRY ~n := #in~n; 28991#L20 assume !(~n < 1); 28979#L22 assume 1 == ~n;#res := 1; 28974#fibo2FINAL assume true; 28965#fibo2EXIT >#52#return; 28961#L15-1 call #t~ret8 := fibo2(~n - 2);< 28964#fibo2ENTRY ~n := #in~n; 29015#L20 assume !(~n < 1); 30398#L22 assume !(1 == ~n); 30002#L25 call #t~ret9 := fibo1(~n - 1);< 30003#fibo1ENTRY ~n := #in~n; 30393#L10 assume !(~n < 1); 30391#L12 assume 1 == ~n;#res := 1; 30390#fibo1FINAL assume true; 30001#fibo1EXIT >#48#return; 29996#L25-1 call #t~ret10 := fibo1(~n - 2);< 29999#fibo1ENTRY ~n := #in~n; 30297#L10 assume ~n < 1;#res := 0; 30287#fibo1FINAL assume true; 29995#fibo1EXIT >#50#return; 29990#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret10;havoc #t~ret9; 29989#fibo2FINAL assume true; 29958#fibo2EXIT >#54#return; 29947#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 29939#fibo1FINAL assume true; 29880#fibo1EXIT >#48#return; 29878#L25-1 [2020-10-20 08:01:13,166 INFO L796 eck$LassoCheckResult]: Loop: 29878#L25-1 call #t~ret10 := fibo1(~n - 2);< 29927#fibo1ENTRY ~n := #in~n; 29986#L10 assume !(~n < 1); 29984#L12 assume !(1 == ~n); 29926#L15 call #t~ret7 := fibo2(~n - 1);< 29983#fibo2ENTRY ~n := #in~n; 30397#L20 assume !(~n < 1); 30395#L22 assume 1 == ~n;#res := 1; 29982#fibo2FINAL assume true; 29953#fibo2EXIT >#52#return; 29954#L15-1 call #t~ret8 := fibo2(~n - 2);< 29959#fibo2ENTRY ~n := #in~n; 30220#L20 assume !(~n < 1); 30218#L22 assume !(1 == ~n); 29882#L25 call #t~ret9 := fibo1(~n - 1);< 29925#fibo1ENTRY ~n := #in~n; 30433#L10 assume !(~n < 1); 30431#L12 assume !(1 == ~n); 30114#L15 call #t~ret7 := fibo2(~n - 1);< 30115#fibo2ENTRY ~n := #in~n; 30209#L20 assume !(~n < 1); 30185#L22 assume 1 == ~n;#res := 1; 30133#fibo2FINAL assume true; 30112#fibo2EXIT >#52#return; 30103#L15-1 call #t~ret8 := fibo2(~n - 2);< 30108#fibo2ENTRY ~n := #in~n; 30174#L20 assume ~n < 1;#res := 0; 30140#fibo2FINAL assume true; 30102#fibo2EXIT >#54#return; 30101#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 30099#fibo1FINAL assume true; 30096#fibo1EXIT >#48#return; 29878#L25-1 [2020-10-20 08:01:13,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:13,167 INFO L82 PathProgramCache]: Analyzing trace with hash -947123609, now seen corresponding path program 1 times [2020-10-20 08:01:13,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:01:13,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936620045] [2020-10-20 08:01:13,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:01:13,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:13,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-20 08:01:13,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:13,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-10-20 08:01:13,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:13,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 08:01:13,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:13,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-20 08:01:13,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:13,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 08:01:13,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:13,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-20 08:01:13,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:13,334 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 11 proven. 79 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-20 08:01:13,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936620045] [2020-10-20 08:01:13,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162742928] [2020-10-20 08:01:13,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 08:01:13,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:13,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-20 08:01:13,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:13,505 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 62 proven. 22 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-20 08:01:13,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 08:01:13,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-20 08:01:13,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057662477] [2020-10-20 08:01:13,507 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-20 08:01:13,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:13,507 INFO L82 PathProgramCache]: Analyzing trace with hash 630784763, now seen corresponding path program 1 times [2020-10-20 08:01:13,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:01:13,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986040911] [2020-10-20 08:01:13,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:01:13,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:13,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-20 08:01:13,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:13,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-20 08:01:13,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:13,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 08:01:13,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:13,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-20 08:01:13,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:13,567 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-20 08:01:13,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986040911] [2020-10-20 08:01:13,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833889487] [2020-10-20 08:01:13,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 08:01:13,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:13,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-20 08:01:13,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:13,620 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 20 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-20 08:01:13,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 08:01:13,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-20 08:01:13,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438826138] [2020-10-20 08:01:13,621 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-10-20 08:01:13,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 08:01:13,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-20 08:01:13,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-20 08:01:13,622 INFO L87 Difference]: Start difference. First operand 3231 states and 4807 transitions. cyclomatic complexity: 1612 Second operand 8 states. [2020-10-20 08:01:13,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 08:01:13,748 INFO L93 Difference]: Finished difference Result 1630 states and 2151 transitions. [2020-10-20 08:01:13,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-20 08:01:13,749 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1630 states and 2151 transitions. [2020-10-20 08:01:13,771 INFO L131 ngComponentsAnalysis]: Automaton has 5 accepting balls. 132 [2020-10-20 08:01:13,794 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1630 states to 1533 states and 2040 transitions. [2020-10-20 08:01:13,794 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 596 [2020-10-20 08:01:13,796 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 596 [2020-10-20 08:01:13,796 INFO L73 IsDeterministic]: Start isDeterministic. Operand 1533 states and 2040 transitions. [2020-10-20 08:01:13,796 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 08:01:13,797 INFO L691 BuchiCegarLoop]: Abstraction has 1533 states and 2040 transitions. [2020-10-20 08:01:13,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1533 states and 2040 transitions. [2020-10-20 08:01:13,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1533 to 1399. [2020-10-20 08:01:13,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1399 states. [2020-10-20 08:01:13,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1399 states to 1399 states and 1795 transitions. [2020-10-20 08:01:13,857 INFO L714 BuchiCegarLoop]: Abstraction has 1399 states and 1795 transitions. [2020-10-20 08:01:13,857 INFO L594 BuchiCegarLoop]: Abstraction has 1399 states and 1795 transitions. [2020-10-20 08:01:13,857 INFO L427 BuchiCegarLoop]: ======== Iteration 9============ [2020-10-20 08:01:13,857 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 1399 states and 1795 transitions. [2020-10-20 08:01:13,868 INFO L131 ngComponentsAnalysis]: Automaton has 5 accepting balls. 132 [2020-10-20 08:01:13,868 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 08:01:13,868 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 08:01:13,872 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [6, 5, 5, 4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 08:01:13,872 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [10, 9, 8, 7, 6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2] [2020-10-20 08:01:13,872 INFO L794 eck$LassoCheckResult]: Stem: 34167#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); 34164#L-1 havoc main_#res;havoc main_#t~ret11, main_~x~0, main_~result~0;main_~x~0 := 8; 34121#L39 call main_#t~ret11 := fibo1(main_~x~0);< 34122#fibo1ENTRY ~n := #in~n; 34211#L10 assume !(~n < 1); 34210#L12 assume !(1 == ~n); 34206#L15 call #t~ret7 := fibo2(~n - 1);< 34209#fibo2ENTRY ~n := #in~n; 34208#L20 assume !(~n < 1); 34207#L22 assume !(1 == ~n); 34200#L25 call #t~ret9 := fibo1(~n - 1);< 34205#fibo1ENTRY ~n := #in~n; 34203#L10 assume !(~n < 1); 34204#L12 assume !(1 == ~n); 34193#L15 call #t~ret7 := fibo2(~n - 1);< 34201#fibo2ENTRY ~n := #in~n; 34196#L20 assume !(~n < 1); 34197#L22 assume !(1 == ~n); 34189#L25 call #t~ret9 := fibo1(~n - 1);< 34188#fibo1ENTRY ~n := #in~n; 34191#L10 assume !(~n < 1); 34202#L12 assume !(1 == ~n); 34195#L15 call #t~ret7 := fibo2(~n - 1);< 34198#fibo2ENTRY ~n := #in~n; 34199#L20 assume !(~n < 1); 34194#L22 assume !(1 == ~n); 34190#L25 call #t~ret9 := fibo1(~n - 1);< 34188#fibo1ENTRY ~n := #in~n; 34191#L10 assume !(~n < 1); 34202#L12 assume !(1 == ~n); 34195#L15 call #t~ret7 := fibo2(~n - 1);< 34198#fibo2ENTRY ~n := #in~n; 34199#L20 assume !(~n < 1); 34194#L22 assume !(1 == ~n); 34190#L25 call #t~ret9 := fibo1(~n - 1);< 34188#fibo1ENTRY ~n := #in~n; 34192#L10 assume !(~n < 1); 34243#L12 assume 1 == ~n;#res := 1; 34244#fibo1FINAL assume true; 35197#fibo1EXIT >#48#return; 35193#L25-1 call #t~ret10 := fibo1(~n - 2);< 35196#fibo1ENTRY ~n := #in~n; 35199#L10 assume ~n < 1;#res := 0; 35198#fibo1FINAL assume true; 35192#fibo1EXIT >#50#return; 35190#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret10;havoc #t~ret9; 35188#fibo2FINAL assume true; 35087#fibo2EXIT >#52#return; 34139#L15-1 call #t~ret8 := fibo2(~n - 2);< 35097#fibo2ENTRY ~n := #in~n; 35362#L20 assume ~n < 1;#res := 0; 35361#fibo2FINAL assume true; 35360#fibo2EXIT >#54#return; 35356#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 35350#fibo1FINAL assume true; 35118#fibo1EXIT >#48#return; 35089#L25-1 [2020-10-20 08:01:13,874 INFO L796 eck$LassoCheckResult]: Loop: 35089#L25-1 call #t~ret10 := fibo1(~n - 2);< 35108#fibo1ENTRY ~n := #in~n; 35148#L10 assume !(~n < 1); 35146#L12 assume !(1 == ~n); 35082#L15 call #t~ret7 := fibo2(~n - 1);< 35093#fibo2ENTRY ~n := #in~n; 35134#L20 assume !(~n < 1); 35130#L22 assume !(1 == ~n); 35092#L25 call #t~ret9 := fibo1(~n - 1);< 35108#fibo1ENTRY ~n := #in~n; 35148#L10 assume !(~n < 1); 35146#L12 assume !(1 == ~n); 35082#L15 call #t~ret7 := fibo2(~n - 1);< 35093#fibo2ENTRY ~n := #in~n; 35134#L20 assume !(~n < 1); 35130#L22 assume !(1 == ~n); 35092#L25 call #t~ret9 := fibo1(~n - 1);< 35108#fibo1ENTRY ~n := #in~n; 35148#L10 assume !(~n < 1); 35146#L12 assume !(1 == ~n); 35082#L15 call #t~ret7 := fibo2(~n - 1);< 35093#fibo2ENTRY ~n := #in~n; 35134#L20 assume !(~n < 1); 35130#L22 assume !(1 == ~n); 35092#L25 call #t~ret9 := fibo1(~n - 1);< 35108#fibo1ENTRY ~n := #in~n; 35148#L10 assume !(~n < 1); 35146#L12 assume 1 == ~n;#res := 1; 35144#fibo1FINAL assume true; 35137#fibo1EXIT >#48#return; 35110#L25-1 call #t~ret10 := fibo1(~n - 2);< 35111#fibo1ENTRY ~n := #in~n; 35353#L10 assume ~n < 1;#res := 0; 35149#fibo1FINAL assume true; 35109#fibo1EXIT >#50#return; 35102#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret10;havoc #t~ret9; 35096#fibo2FINAL assume true; 35081#fibo2EXIT >#52#return; 34138#L15-1 call #t~ret8 := fibo2(~n - 2);< 35133#fibo2ENTRY ~n := #in~n; 35147#L20 assume !(~n < 1); 35145#L22 assume !(1 == ~n); 34962#L25 call #t~ret9 := fibo1(~n - 1);< 35121#fibo1ENTRY ~n := #in~n; 35162#L10 assume !(~n < 1); 35047#L12 assume !(1 == ~n); 35048#L15 call #t~ret7 := fibo2(~n - 1);< 35185#fibo2ENTRY ~n := #in~n; 35219#L20 assume !(~n < 1); 35228#L22 assume !(1 == ~n); 35223#L25 call #t~ret9 := fibo1(~n - 1);< 35226#fibo1ENTRY ~n := #in~n; 35284#L10 assume !(~n < 1); 35283#L12 assume 1 == ~n;#res := 1; 35230#fibo1FINAL assume true; 35222#fibo1EXIT >#48#return; 35205#L25-1 call #t~ret10 := fibo1(~n - 2);< 35209#fibo1ENTRY ~n := #in~n; 35278#L10 assume ~n < 1;#res := 0; 35275#fibo1FINAL assume true; 35202#fibo1EXIT >#50#return; 35201#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret10;havoc #t~ret9; 35200#fibo2FINAL assume true; 35184#fibo2EXIT >#52#return; 35177#L15-1 call #t~ret8 := fibo2(~n - 2);< 35182#fibo2ENTRY ~n := #in~n; 35216#L20 assume ~n < 1;#res := 0; 35181#fibo2FINAL assume true; 35176#fibo2EXIT >#54#return; 35179#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 35433#fibo1FINAL assume true; 35119#fibo1EXIT >#48#return; 35089#L25-1 call #t~ret10 := fibo1(~n - 2);< 35108#fibo1ENTRY ~n := #in~n; 35148#L10 assume !(~n < 1); 35146#L12 assume 1 == ~n;#res := 1; 35144#fibo1FINAL assume true; 35137#fibo1EXIT >#50#return; 35106#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret10;havoc #t~ret9; 35142#fibo2FINAL assume true; 35132#fibo2EXIT >#54#return; 35083#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 35129#fibo1FINAL assume true; 35120#fibo1EXIT >#48#return; 35089#L25-1 call #t~ret10 := fibo1(~n - 2);< 35108#fibo1ENTRY ~n := #in~n; 35148#L10 assume !(~n < 1); 35146#L12 assume 1 == ~n;#res := 1; 35144#fibo1FINAL assume true; 35137#fibo1EXIT >#50#return; 35106#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret10;havoc #t~ret9; 35142#fibo2FINAL assume true; 35132#fibo2EXIT >#52#return; 34138#L15-1 call #t~ret8 := fibo2(~n - 2);< 35151#fibo2ENTRY ~n := #in~n; 35402#L20 assume ~n < 1;#res := 0; 35247#fibo2FINAL assume true; 35154#fibo2EXIT >#54#return; 35156#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 35349#fibo1FINAL assume true; 35104#fibo1EXIT >#48#return; 35089#L25-1 [2020-10-20 08:01:13,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:13,874 INFO L82 PathProgramCache]: Analyzing trace with hash 50807002, now seen corresponding path program 1 times [2020-10-20 08:01:13,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:01:13,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407583349] [2020-10-20 08:01:13,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:01:13,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:14,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-20 08:01:14,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:14,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 08:01:14,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:14,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 08:01:14,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:14,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-20 08:01:14,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:14,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-20 08:01:14,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:14,189 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 28 proven. 47 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-20 08:01:14,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407583349] [2020-10-20 08:01:14,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31077755] [2020-10-20 08:01:14,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 08:01:14,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:14,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-20 08:01:14,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:14,323 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 28 proven. 53 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-20 08:01:14,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 08:01:14,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 24 [2020-10-20 08:01:14,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068357033] [2020-10-20 08:01:14,324 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-20 08:01:14,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:14,325 INFO L82 PathProgramCache]: Analyzing trace with hash 1856679522, now seen corresponding path program 1 times [2020-10-20 08:01:14,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:01:14,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578744401] [2020-10-20 08:01:14,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:01:14,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:14,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-20 08:01:14,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:14,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 08:01:14,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:14,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 08:01:14,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:14,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 08:01:14,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:14,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 08:01:14,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:14,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-20 08:01:14,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:14,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-20 08:01:14,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:14,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 08:01:14,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:14,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 08:01:14,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:14,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 08:01:14,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:14,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-20 08:01:14,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:14,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-20 08:01:14,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:14,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-20 08:01:14,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:14,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-10-20 08:01:14,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:14,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-10-20 08:01:14,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:14,641 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 86 proven. 37 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-10-20 08:01:14,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578744401] [2020-10-20 08:01:14,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836784146] [2020-10-20 08:01:14,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 08:01:14,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:14,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-20 08:01:14,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:14,842 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 142 proven. 47 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-10-20 08:01:14,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 08:01:14,844 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 16 [2020-10-20 08:01:14,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667579616] [2020-10-20 08:01:14,846 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-10-20 08:01:14,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 08:01:14,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-20 08:01:14,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2020-10-20 08:01:14,847 INFO L87 Difference]: Start difference. First operand 1399 states and 1795 transitions. cyclomatic complexity: 410 Second operand 24 states. [2020-10-20 08:01:15,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 08:01:15,761 INFO L93 Difference]: Finished difference Result 1581 states and 1917 transitions. [2020-10-20 08:01:15,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-20 08:01:15,762 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1581 states and 1917 transitions. [2020-10-20 08:01:15,776 INFO L131 ngComponentsAnalysis]: Automaton has 5 accepting balls. 141 [2020-10-20 08:01:15,784 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1581 states to 859 states and 1021 transitions. [2020-10-20 08:01:15,785 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 476 [2020-10-20 08:01:15,785 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 476 [2020-10-20 08:01:15,785 INFO L73 IsDeterministic]: Start isDeterministic. Operand 859 states and 1021 transitions. [2020-10-20 08:01:15,786 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 08:01:15,786 INFO L691 BuchiCegarLoop]: Abstraction has 859 states and 1021 transitions. [2020-10-20 08:01:15,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 859 states and 1021 transitions. [2020-10-20 08:01:15,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 859 to 738. [2020-10-20 08:01:15,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 738 states. [2020-10-20 08:01:15,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 738 states to 738 states and 882 transitions. [2020-10-20 08:01:15,805 INFO L714 BuchiCegarLoop]: Abstraction has 738 states and 882 transitions. [2020-10-20 08:01:15,805 INFO L594 BuchiCegarLoop]: Abstraction has 738 states and 882 transitions. [2020-10-20 08:01:15,805 INFO L427 BuchiCegarLoop]: ======== Iteration 10============ [2020-10-20 08:01:15,805 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 738 states and 882 transitions. [2020-10-20 08:01:15,809 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 108 [2020-10-20 08:01:15,809 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 08:01:15,809 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 08:01:15,811 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [5, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 08:01:15,811 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 08:01:15,812 INFO L794 eck$LassoCheckResult]: Stem: 38127#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); 38123#L-1 havoc main_#res;havoc main_#t~ret11, main_~x~0, main_~result~0;main_~x~0 := 8; 38100#L39 call main_#t~ret11 := fibo1(main_~x~0);< 38101#fibo1ENTRY ~n := #in~n; 38213#L10 assume !(~n < 1); 38212#L12 assume !(1 == ~n); 38208#L15 call #t~ret7 := fibo2(~n - 1);< 38211#fibo2ENTRY ~n := #in~n; 38210#L20 assume !(~n < 1); 38209#L22 assume !(1 == ~n); 38204#L25 call #t~ret9 := fibo1(~n - 1);< 38207#fibo1ENTRY ~n := #in~n; 38206#L10 assume !(~n < 1); 38205#L12 assume !(1 == ~n); 38200#L15 call #t~ret7 := fibo2(~n - 1);< 38203#fibo2ENTRY ~n := #in~n; 38202#L20 assume !(~n < 1); 38201#L22 assume !(1 == ~n); 38177#L25 call #t~ret9 := fibo1(~n - 1);< 38178#fibo1ENTRY ~n := #in~n; 38198#L10 assume !(~n < 1); 38195#L12 assume !(1 == ~n); 38173#L15 call #t~ret7 := fibo2(~n - 1);< 38186#fibo2ENTRY ~n := #in~n; 38182#L20 assume !(~n < 1); 38180#L22 assume !(1 == ~n); 38176#L25 call #t~ret9 := fibo1(~n - 1);< 38178#fibo1ENTRY ~n := #in~n; 38197#L10 assume !(~n < 1); 38193#L12 assume 1 == ~n;#res := 1; 38194#fibo1FINAL assume true; 38397#fibo1EXIT >#48#return; 38391#L25-1 call #t~ret10 := fibo1(~n - 2);< 38392#fibo1ENTRY ~n := #in~n; 38620#L10 assume ~n < 1;#res := 0; 38619#fibo1FINAL assume true; 38390#fibo1EXIT >#50#return; 38388#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret10;havoc #t~ret9; 38387#fibo2FINAL assume true; 38385#fibo2EXIT >#52#return; 38368#L15-1 call #t~ret8 := fibo2(~n - 2);< 38382#fibo2ENTRY ~n := #in~n; 38606#L20 assume !(~n < 1); 38604#L22 assume 1 == ~n;#res := 1; 38603#fibo2FINAL assume true; 38597#fibo2EXIT >#54#return; 38595#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 38592#fibo1FINAL assume true; 38364#fibo1EXIT >#48#return; 38346#L25-1 call #t~ret10 := fibo1(~n - 2);< 38351#fibo1ENTRY [2020-10-20 08:01:15,812 INFO L796 eck$LassoCheckResult]: Loop: 38351#fibo1ENTRY ~n := #in~n; 38617#L10 assume !(~n < 1); 38374#L12 assume !(1 == ~n); 38367#L15 call #t~ret7 := fibo2(~n - 1);< 38373#fibo2ENTRY ~n := #in~n; 38409#L20 assume !(~n < 1); 38404#L22 assume !(1 == ~n); 38348#L25 call #t~ret9 := fibo1(~n - 1);< 38357#fibo1ENTRY ~n := #in~n; 38377#L10 assume !(~n < 1); 38374#L12 assume !(1 == ~n); 38367#L15 call #t~ret7 := fibo2(~n - 1);< 38373#fibo2ENTRY ~n := #in~n; 38409#L20 assume !(~n < 1); 38404#L22 assume 1 == ~n;#res := 1; 38405#fibo2FINAL assume true; 38699#fibo2EXIT >#52#return; 38638#L15-1 call #t~ret8 := fibo2(~n - 2);< 38639#fibo2ENTRY ~n := #in~n; 38694#L20 assume ~n < 1;#res := 0; 38645#fibo2FINAL assume true; 38637#fibo2EXIT >#54#return; 38635#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 38634#fibo1FINAL assume true; 38342#fibo1EXIT >#48#return; 38344#L25-1 call #t~ret10 := fibo1(~n - 2);< 38351#fibo1ENTRY [2020-10-20 08:01:15,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:15,812 INFO L82 PathProgramCache]: Analyzing trace with hash 482791451, now seen corresponding path program 2 times [2020-10-20 08:01:15,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:01:15,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550574307] [2020-10-20 08:01:15,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:01:15,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:15,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-20 08:01:15,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:15,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 08:01:15,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:15,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 08:01:15,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:15,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-20 08:01:15,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:15,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-20 08:01:15,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:15,995 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 3 proven. 50 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-20 08:01:15,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550574307] [2020-10-20 08:01:15,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808067020] [2020-10-20 08:01:15,996 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 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 08:01:16,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-20 08:01:16,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 08:01:16,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-20 08:01:16,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:16,103 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 3 proven. 50 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-20 08:01:16,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 08:01:16,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2020-10-20 08:01:16,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621731473] [2020-10-20 08:01:16,105 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-20 08:01:16,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:16,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1552659165, now seen corresponding path program 2 times [2020-10-20 08:01:16,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:01:16,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667142402] [2020-10-20 08:01:16,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:01:16,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:01:16,111 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:01:16,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:01:16,115 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:01:16,118 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 08:01:16,437 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 08:01:16,437 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 08:01:16,437 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 08:01:16,437 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 08:01:16,438 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-20 08:01:16,438 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:16,438 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 08:01:16,438 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 08:01:16,438 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_8-2.c_Iteration10_Loop [2020-10-20 08:01:16,438 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 08:01:16,438 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 08:01:16,439 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 08:01:16,446 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 08:01:16,483 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 08:01:16,484 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 08:01:16,487 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 08:01:16,489 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 08:01:16,491 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 08:01:16,493 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 08:01:16,495 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 08:01:16,498 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 08:01:16,556 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 08:01:16,559 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 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 96 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:16,562 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:01:16,563 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:01:16,565 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:01:16,565 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 97 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 97 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:16,589 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:01:16,589 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 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 98 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:16,614 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-20 08:01:16,614 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:01:16,686 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-20 08:01:16,688 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 08:01:16,688 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 08:01:16,688 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 08:01:16,688 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 08:01:16,688 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-20 08:01:16,689 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:16,689 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 08:01:16,689 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 08:01:16,689 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_8-2.c_Iteration10_Loop [2020-10-20 08:01:16,689 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 08:01:16,689 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 08:01:16,690 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 08:01:16,692 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 08:01:16,706 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 08:01:16,708 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 08:01:16,710 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 08:01:16,712 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 08:01:16,715 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 08:01:16,716 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 08:01:16,721 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 08:01:16,723 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 08:01:16,779 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 08:01:16,779 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 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 99 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:16,782 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 08:01:16,783 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:16,783 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:16,784 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:16,784 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:16,784 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:16,784 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:16,784 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:16,786 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 100 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 100 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:16,809 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 08:01:16,810 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:16,810 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:16,811 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:16,811 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:16,811 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:16,811 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:16,812 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:16,813 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-20 08:01:16,823 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-20 08:01:16,824 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 101 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:01:16,827 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-20 08:01:16,827 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-20 08:01:16,827 INFO L510 LassoAnalysis]: Proved termination. [2020-10-20 08:01:16,827 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 101 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:16,859 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-20 08:01:16,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:16,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:16,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-20 08:01:16,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:16,972 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:16,976 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:16,978 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:16,981 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:17,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:17,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-20 08:01:17,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:17,164 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-20 08:01:17,164 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 10 loop predicates [2020-10-20 08:01:17,165 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 738 states and 882 transitions. cyclomatic complexity: 153 Second operand 12 states. [2020-10-20 08:01:17,517 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 738 states and 882 transitions. cyclomatic complexity: 153. Second operand 12 states. Result 873 states and 1029 transitions. Complement of second has 16 states. [2020-10-20 08:01:17,518 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 08:01:17,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-10-20 08:01:17,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 41 transitions. [2020-10-20 08:01:17,519 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 41 transitions. Stem has 50 letters. Loop has 26 letters. [2020-10-20 08:01:17,519 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:17,519 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-20 08:01:17,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:17,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:17,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-20 08:01:17,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:17,630 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:17,632 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:17,634 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:17,638 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:17,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:17,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-20 08:01:17,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:17,799 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-20 08:01:17,800 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 10 loop predicates [2020-10-20 08:01:17,800 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 738 states and 882 transitions. cyclomatic complexity: 153 Second operand 12 states. [2020-10-20 08:01:18,343 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 738 states and 882 transitions. cyclomatic complexity: 153. Second operand 12 states. Result 925 states and 1086 transitions. Complement of second has 39 states. [2020-10-20 08:01:18,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 11 states 2 stem states 8 non-accepting loop states 1 accepting loop states [2020-10-20 08:01:18,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-10-20 08:01:18,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 56 transitions. [2020-10-20 08:01:18,346 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 56 transitions. Stem has 50 letters. Loop has 26 letters. [2020-10-20 08:01:18,346 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:18,346 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-20 08:01:18,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:18,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:18,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-20 08:01:18,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:18,457 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:18,460 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:18,462 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:18,465 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:18,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:18,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-20 08:01:18,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:18,669 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-20 08:01:18,669 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 10 loop predicates [2020-10-20 08:01:18,669 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 738 states and 882 transitions. cyclomatic complexity: 153 Second operand 12 states. [2020-10-20 08:01:18,945 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 738 states and 882 transitions. cyclomatic complexity: 153. Second operand 12 states. Result 1091 states and 1260 transitions. Complement of second has 15 states. [2020-10-20 08:01:18,946 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 08:01:18,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-10-20 08:01:18,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 45 transitions. [2020-10-20 08:01:18,947 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 45 transitions. Stem has 50 letters. Loop has 26 letters. [2020-10-20 08:01:18,949 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:18,950 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-20 08:01:18,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:19,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:19,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-20 08:01:19,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:19,040 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:19,042 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:19,044 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:19,046 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:19,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:19,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-20 08:01:19,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:19,241 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-20 08:01:19,242 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and with honda bouncer for loop.2 stem predicates 10 loop predicates [2020-10-20 08:01:19,242 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 738 states and 882 transitions. cyclomatic complexity: 153 Second operand 12 states. [2020-10-20 08:01:19,766 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 738 states and 882 transitions. cyclomatic complexity: 153. Second operand 12 states. Result 1443 states and 1661 transitions. Complement of second has 43 states. [2020-10-20 08:01:19,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 11 states 2 stem states 8 non-accepting loop states 1 accepting loop states [2020-10-20 08:01:19,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-10-20 08:01:19,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 60 transitions. [2020-10-20 08:01:19,769 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 60 transitions. Stem has 50 letters. Loop has 26 letters. [2020-10-20 08:01:19,770 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:19,770 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 60 transitions. Stem has 76 letters. Loop has 26 letters. [2020-10-20 08:01:19,771 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:19,771 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 60 transitions. Stem has 50 letters. Loop has 52 letters. [2020-10-20 08:01:19,773 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:19,773 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1443 states and 1661 transitions. [2020-10-20 08:01:19,788 INFO L131 ngComponentsAnalysis]: Automaton has 8 accepting balls. 188 [2020-10-20 08:01:19,801 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1443 states to 1051 states and 1245 transitions. [2020-10-20 08:01:19,801 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 439 [2020-10-20 08:01:19,803 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 498 [2020-10-20 08:01:19,803 INFO L73 IsDeterministic]: Start isDeterministic. Operand 1051 states and 1245 transitions. [2020-10-20 08:01:19,803 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 08:01:19,803 INFO L691 BuchiCegarLoop]: Abstraction has 1051 states and 1245 transitions. [2020-10-20 08:01:19,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1051 states and 1245 transitions. [2020-10-20 08:01:19,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1051 to 951. [2020-10-20 08:01:19,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 951 states. [2020-10-20 08:01:19,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 951 states to 951 states and 1110 transitions. [2020-10-20 08:01:19,833 INFO L714 BuchiCegarLoop]: Abstraction has 951 states and 1110 transitions. [2020-10-20 08:01:19,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 08:01:19,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-20 08:01:19,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2020-10-20 08:01:19,835 INFO L87 Difference]: Start difference. First operand 951 states and 1110 transitions. Second operand 18 states. [2020-10-20 08:01:20,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 08:01:20,487 INFO L93 Difference]: Finished difference Result 1468 states and 1837 transitions. [2020-10-20 08:01:20,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-20 08:01:20,488 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1468 states and 1837 transitions. [2020-10-20 08:01:20,498 INFO L131 ngComponentsAnalysis]: Automaton has 10 accepting balls. 288 [2020-10-20 08:01:20,514 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1468 states to 1398 states and 1727 transitions. [2020-10-20 08:01:20,514 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 618 [2020-10-20 08:01:20,515 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 618 [2020-10-20 08:01:20,515 INFO L73 IsDeterministic]: Start isDeterministic. Operand 1398 states and 1727 transitions. [2020-10-20 08:01:20,515 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 08:01:20,515 INFO L691 BuchiCegarLoop]: Abstraction has 1398 states and 1727 transitions. [2020-10-20 08:01:20,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1398 states and 1727 transitions. [2020-10-20 08:01:20,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1398 to 1143. [2020-10-20 08:01:20,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1143 states. [2020-10-20 08:01:20,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1143 states to 1143 states and 1395 transitions. [2020-10-20 08:01:20,548 INFO L714 BuchiCegarLoop]: Abstraction has 1143 states and 1395 transitions. [2020-10-20 08:01:20,548 INFO L594 BuchiCegarLoop]: Abstraction has 1143 states and 1395 transitions. [2020-10-20 08:01:20,548 INFO L427 BuchiCegarLoop]: ======== Iteration 11============ [2020-10-20 08:01:20,548 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 1143 states and 1395 transitions. [2020-10-20 08:01:20,554 INFO L131 ngComponentsAnalysis]: Automaton has 7 accepting balls. 212 [2020-10-20 08:01:20,555 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 08:01:20,555 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 08:01:20,556 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [6, 5, 5, 5, 5, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 08:01:20,557 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 08:01:20,558 INFO L794 eck$LassoCheckResult]: Stem: 46989#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); 46988#L-1 havoc main_#res;havoc main_#t~ret11, main_~x~0, main_~result~0;main_~x~0 := 8; 46953#L39 call main_#t~ret11 := fibo1(main_~x~0);< 46954#fibo1ENTRY ~n := #in~n; 47029#L10 assume !(~n < 1); 47027#L12 assume !(1 == ~n); 47024#L15 call #t~ret7 := fibo2(~n - 1);< 47025#fibo2ENTRY ~n := #in~n; 47040#L20 assume !(~n < 1); 47038#L22 assume !(1 == ~n); 47035#L25 call #t~ret9 := fibo1(~n - 1);< 47036#fibo1ENTRY ~n := #in~n; 47103#L10 assume !(~n < 1); 47100#L12 assume !(1 == ~n); 47052#L15 call #t~ret7 := fibo2(~n - 1);< 47053#fibo2ENTRY ~n := #in~n; 47158#L20 assume !(~n < 1); 47153#L22 assume !(1 == ~n); 47097#L25 call #t~ret9 := fibo1(~n - 1);< 47099#fibo1ENTRY ~n := #in~n; 47454#L10 assume !(~n < 1); 47504#L12 assume !(1 == ~n); 47149#L15 call #t~ret7 := fibo2(~n - 1);< 47150#fibo2ENTRY ~n := #in~n; 47448#L20 assume !(~n < 1); 47447#L22 assume !(1 == ~n); 47098#L25 call #t~ret9 := fibo1(~n - 1);< 47099#fibo1ENTRY ~n := #in~n; 47452#L10 assume !(~n < 1); 47450#L12 assume 1 == ~n;#res := 1; 47449#fibo1FINAL assume true; 47446#fibo1EXIT >#48#return; 47444#L25-1 call #t~ret10 := fibo1(~n - 2);< 47445#fibo1ENTRY ~n := #in~n; 47455#L10 assume ~n < 1;#res := 0; 47453#fibo1FINAL assume true; 47443#fibo1EXIT >#50#return; 47442#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret10;havoc #t~ret9; 47439#fibo2FINAL assume true; 47438#fibo2EXIT >#52#return; 47183#L15-1 call #t~ret8 := fibo2(~n - 2);< 47437#fibo2ENTRY ~n := #in~n; 47296#L20 assume !(~n < 1); 47292#L22 assume !(1 == ~n); 47250#L25 call #t~ret9 := fibo1(~n - 1);< 47251#fibo1ENTRY ~n := #in~n; 47413#L10 assume !(~n < 1); 47411#L12 assume !(1 == ~n); 46984#L15 call #t~ret7 := fibo2(~n - 1);< 47409#fibo2ENTRY ~n := #in~n; 47418#L20 assume !(~n < 1); 48023#L22 assume !(1 == ~n); 46999#L25 [2020-10-20 08:01:20,558 INFO L796 eck$LassoCheckResult]: Loop: 46999#L25 call #t~ret9 := fibo1(~n - 1);< 48011#fibo1ENTRY ~n := #in~n; 48046#L10 assume !(~n < 1); 48045#L12 assume !(1 == ~n); 46934#L15 call #t~ret7 := fibo2(~n - 1);< 48044#fibo2ENTRY ~n := #in~n; 48043#L20 assume !(~n < 1); 48040#L22 assume !(1 == ~n); 48028#L25 call #t~ret9 := fibo1(~n - 1);< 48029#fibo1ENTRY ~n := #in~n; 48035#L10 assume !(~n < 1); 48033#L12 assume 1 == ~n;#res := 1; 48031#fibo1FINAL assume true; 48027#fibo1EXIT >#48#return; 47962#L25-1 call #t~ret10 := fibo1(~n - 2);< 47963#fibo1ENTRY ~n := #in~n; 48022#L10 assume ~n < 1;#res := 0; 48009#fibo1FINAL assume true; 48021#fibo1EXIT >#50#return; 46931#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret10;havoc #t~ret9; 46936#fibo2FINAL assume true; 46949#fibo2EXIT >#52#return; 46933#L15-1 call #t~ret8 := fibo2(~n - 2);< 48070#fibo2ENTRY ~n := #in~n; 48069#L20 assume !(~n < 1); 46948#L22 assume !(1 == ~n); 46944#L25 call #t~ret9 := fibo1(~n - 1);< 46980#fibo1ENTRY ~n := #in~n; 46943#L10 assume !(~n < 1); 46945#L12 assume !(1 == ~n); 46981#L15 call #t~ret7 := fibo2(~n - 1);< 46991#fibo2ENTRY ~n := #in~n; 47418#L20 assume !(~n < 1); 48023#L22 assume !(1 == ~n); 46999#L25 [2020-10-20 08:01:20,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:20,559 INFO L82 PathProgramCache]: Analyzing trace with hash -2135425092, now seen corresponding path program 1 times [2020-10-20 08:01:20,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:01:20,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177037429] [2020-10-20 08:01:20,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:01:20,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:20,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-20 08:01:20,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:20,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 08:01:20,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:20,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-20 08:01:20,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:20,730 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 38 proven. 42 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-20 08:01:20,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177037429] [2020-10-20 08:01:20,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386214136] [2020-10-20 08:01:20,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 08:01:20,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:20,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-20 08:01:20,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:20,863 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 38 proven. 42 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-20 08:01:20,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 08:01:20,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2020-10-20 08:01:20,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420597135] [2020-10-20 08:01:20,864 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-20 08:01:20,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:20,865 INFO L82 PathProgramCache]: Analyzing trace with hash 307692230, now seen corresponding path program 1 times [2020-10-20 08:01:20,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:01:20,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460492984] [2020-10-20 08:01:20,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:01:20,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:20,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-20 08:01:20,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:20,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 08:01:20,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:20,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-20 08:01:20,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:20,940 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-20 08:01:20,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460492984] [2020-10-20 08:01:20,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691701168] [2020-10-20 08:01:20,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 08:01:20,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:20,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-20 08:01:20,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:21,046 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 19 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-20 08:01:21,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 08:01:21,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 14 [2020-10-20 08:01:21,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523993802] [2020-10-20 08:01:21,047 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-10-20 08:01:21,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 08:01:21,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-20 08:01:21,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2020-10-20 08:01:21,048 INFO L87 Difference]: Start difference. First operand 1143 states and 1395 transitions. cyclomatic complexity: 264 Second operand 14 states. [2020-10-20 08:01:21,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 08:01:21,291 INFO L93 Difference]: Finished difference Result 962 states and 1134 transitions. [2020-10-20 08:01:21,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-20 08:01:21,292 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 962 states and 1134 transitions. [2020-10-20 08:01:21,299 INFO L131 ngComponentsAnalysis]: Automaton has 5 accepting balls. 144 [2020-10-20 08:01:21,306 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 962 states to 855 states and 1010 transitions. [2020-10-20 08:01:21,307 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 404 [2020-10-20 08:01:21,307 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 404 [2020-10-20 08:01:21,307 INFO L73 IsDeterministic]: Start isDeterministic. Operand 855 states and 1010 transitions. [2020-10-20 08:01:21,308 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 08:01:21,308 INFO L691 BuchiCegarLoop]: Abstraction has 855 states and 1010 transitions. [2020-10-20 08:01:21,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 855 states and 1010 transitions. [2020-10-20 08:01:21,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 855 to 809. [2020-10-20 08:01:21,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 809 states. [2020-10-20 08:01:21,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 809 states to 809 states and 955 transitions. [2020-10-20 08:01:21,327 INFO L714 BuchiCegarLoop]: Abstraction has 809 states and 955 transitions. [2020-10-20 08:01:21,327 INFO L594 BuchiCegarLoop]: Abstraction has 809 states and 955 transitions. [2020-10-20 08:01:21,327 INFO L427 BuchiCegarLoop]: ======== Iteration 12============ [2020-10-20 08:01:21,327 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 809 states and 955 transitions. [2020-10-20 08:01:21,331 INFO L131 ngComponentsAnalysis]: Automaton has 5 accepting balls. 144 [2020-10-20 08:01:21,332 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 08:01:21,332 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 08:01:21,332 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [6, 5, 5, 5, 5, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 08:01:21,333 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 08:01:21,333 INFO L794 eck$LassoCheckResult]: Stem: 49453#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); 49449#L-1 havoc main_#res;havoc main_#t~ret11, main_~x~0, main_~result~0;main_~x~0 := 8; 49421#L39 call main_#t~ret11 := fibo1(main_~x~0);< 49422#fibo1ENTRY ~n := #in~n; 49545#L10 assume !(~n < 1); 49544#L12 assume !(1 == ~n); 49535#L15 call #t~ret7 := fibo2(~n - 1);< 49541#fibo2ENTRY ~n := #in~n; 49539#L20 assume !(~n < 1); 49537#L22 assume !(1 == ~n); 49529#L25 call #t~ret9 := fibo1(~n - 1);< 49533#fibo1ENTRY ~n := #in~n; 49531#L10 assume !(~n < 1); 49530#L12 assume !(1 == ~n); 49515#L15 call #t~ret7 := fibo2(~n - 1);< 49524#fibo2ENTRY ~n := #in~n; 49522#L20 assume !(~n < 1); 49516#L22 assume !(1 == ~n); 49493#L25 call #t~ret9 := fibo1(~n - 1);< 49494#fibo1ENTRY ~n := #in~n; 49514#L10 assume !(~n < 1); 49513#L12 assume !(1 == ~n); 49488#L15 call #t~ret7 := fibo2(~n - 1);< 49510#fibo2ENTRY ~n := #in~n; 49504#L20 assume !(~n < 1); 49499#L22 assume !(1 == ~n); 49492#L25 call #t~ret9 := fibo1(~n - 1);< 49494#fibo1ENTRY ~n := #in~n; 49512#L10 assume !(~n < 1); 49511#L12 assume !(1 == ~n); 49508#L15 call #t~ret7 := fibo2(~n - 1);< 49509#fibo2ENTRY ~n := #in~n; 49540#L20 assume !(~n < 1); 49538#L22 assume 1 == ~n;#res := 1; 49521#fibo2FINAL assume true; 49507#fibo2EXIT >#52#return; 49502#L15-1 call #t~ret8 := fibo2(~n - 2);< 49503#fibo2ENTRY ~n := #in~n; 49520#L20 assume ~n < 1;#res := 0; 49506#fibo2FINAL assume true; 49501#fibo2EXIT >#54#return; 49498#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 49497#fibo1FINAL assume true; 49491#fibo1EXIT >#48#return; 49482#L25-1 call #t~ret10 := fibo1(~n - 2);< 49490#fibo1ENTRY ~n := #in~n; 49894#L10 assume !(~n < 1); 49893#L12 assume !(1 == ~n); 49436#L15 call #t~ret7 := fibo2(~n - 1);< 49891#fibo2ENTRY ~n := #in~n; 49902#L20 assume !(~n < 1); 49900#L22 assume !(1 == ~n); 49397#L25 [2020-10-20 08:01:21,333 INFO L796 eck$LassoCheckResult]: Loop: 49397#L25 call #t~ret9 := fibo1(~n - 1);< 49437#fibo1ENTRY ~n := #in~n; 49396#L10 assume !(~n < 1); 49398#L12 assume !(1 == ~n); 49432#L15 call #t~ret7 := fibo2(~n - 1);< 49451#fibo2ENTRY ~n := #in~n; 49454#L20 assume !(~n < 1); 49475#L22 assume !(1 == ~n); 49397#L25 [2020-10-20 08:01:21,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:21,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1830537364, now seen corresponding path program 2 times [2020-10-20 08:01:21,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:01:21,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458386344] [2020-10-20 08:01:21,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:01:21,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:21,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-20 08:01:21,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:21,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 08:01:21,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:21,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-20 08:01:21,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:21,552 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 54 proven. 27 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-20 08:01:21,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458386344] [2020-10-20 08:01:21,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771353777] [2020-10-20 08:01:21,552 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 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 08:01:21,589 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-20 08:01:21,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 08:01:21,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-20 08:01:21,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:21,635 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 54 proven. 27 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-20 08:01:21,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 08:01:21,635 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 20 [2020-10-20 08:01:21,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340179867] [2020-10-20 08:01:21,636 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-20 08:01:21,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:21,636 INFO L82 PathProgramCache]: Analyzing trace with hash -2095272006, now seen corresponding path program 3 times [2020-10-20 08:01:21,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:01:21,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153517326] [2020-10-20 08:01:21,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:01:21,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:01:21,641 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:01:21,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:01:21,643 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:01:21,645 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 08:01:21,741 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 08:01:21,742 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 08:01:21,742 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 08:01:21,742 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 08:01:21,742 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-20 08:01:21,742 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:21,742 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 08:01:21,743 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 08:01:21,743 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_8-2.c_Iteration12_Loop [2020-10-20 08:01:21,743 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 08:01:21,743 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 08:01:21,744 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 08:01:21,746 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 08:01:21,754 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 08:01:21,757 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 08:01:21,759 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 08:01:21,762 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 08:01:21,764 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 08:01:21,766 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 08:01:21,769 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 08:01:21,847 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 08:01:21,847 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 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 105 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:21,851 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:01:21,851 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:01:21,854 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:01:21,855 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 106 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 106 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:21,876 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:01:21,877 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 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 107 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:21,902 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-20 08:01:21,902 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:01:27,430 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-20 08:01:27,431 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 08:01:27,431 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 08:01:27,432 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 08:01:27,432 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 08:01:27,432 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-20 08:01:27,432 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:27,432 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 08:01:27,432 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 08:01:27,432 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_8-2.c_Iteration12_Loop [2020-10-20 08:01:27,432 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 08:01:27,432 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 08:01:27,434 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 08:01:27,435 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 08:01:27,437 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 08:01:27,439 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 08:01:27,441 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 08:01:27,450 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 08:01:27,457 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 08:01:27,459 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 08:01:27,461 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 08:01:27,537 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 08:01:27,537 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 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 108 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:27,540 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 08:01:27,541 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:27,541 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:27,541 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:27,541 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:27,541 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:27,542 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:27,542 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:27,543 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 109 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 109 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:27,565 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 08:01:27,566 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:27,566 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:27,566 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:27,566 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:27,567 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:27,567 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:27,567 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:27,568 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 110 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 110 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:27,590 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 08:01:27,591 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:27,592 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:27,592 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:27,592 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:27,592 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:27,592 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:27,593 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:27,596 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 111 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 111 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:27,620 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 08:01:27,622 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:27,622 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:27,623 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:27,623 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:27,623 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:27,623 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:27,623 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:27,625 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 112 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 112 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:27,648 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 08:01:27,649 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:27,650 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:27,650 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:27,650 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:27,650 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:27,650 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:27,650 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:27,653 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 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 113 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:27,675 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 08:01:27,677 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:27,677 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:27,677 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:27,677 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:27,678 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:27,678 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:27,678 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:27,680 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 114 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 114 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:27,700 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 08:01:27,701 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:27,701 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:27,701 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:27,702 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:27,702 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:27,702 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:27,702 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:27,704 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 115 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 115 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:27,727 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 08:01:27,729 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:27,729 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:27,729 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:27,729 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:27,729 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:27,729 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:27,729 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:27,730 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 116 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 116 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:27,752 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 08:01:27,754 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:27,754 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:27,754 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:27,754 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:27,754 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:27,755 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:27,755 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:27,757 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-20 08:01:27,759 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2020-10-20 08:01:27,760 INFO L444 ModelExtractionUtils]: 2 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 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 117 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:27,762 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-20 08:01:27,763 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-20 08:01:27,763 INFO L510 LassoAnalysis]: Proved termination. [2020-10-20 08:01:27,763 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo2_~n) = 1*fibo2_~n Supporting invariants [] [2020-10-20 08:01:27,783 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-20 08:01:27,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:27,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:27,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-20 08:01:27,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:27,907 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:27,912 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:27,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:27,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-20 08:01:27,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:27,991 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 08:01:27,992 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 08:01:27,992 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 809 states and 955 transitions. cyclomatic complexity: 155 Second operand 8 states. [2020-10-20 08:01:28,108 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 809 states and 955 transitions. cyclomatic complexity: 155. Second operand 8 states. Result 830 states and 977 transitions. Complement of second has 20 states. [2020-10-20 08:01:28,109 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 08:01:28,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-20 08:01:28,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 21 transitions. [2020-10-20 08:01:28,110 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 21 transitions. Stem has 52 letters. Loop has 8 letters. [2020-10-20 08:01:28,110 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:28,110 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-20 08:01:28,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:28,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:28,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-20 08:01:28,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:28,211 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:28,213 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:28,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:28,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-20 08:01:28,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:28,283 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 08:01:28,284 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 08:01:28,284 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 809 states and 955 transitions. cyclomatic complexity: 155 Second operand 8 states. [2020-10-20 08:01:28,418 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 809 states and 955 transitions. cyclomatic complexity: 155. Second operand 8 states. Result 836 states and 983 transitions. Complement of second has 22 states. [2020-10-20 08:01:28,419 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 08:01:28,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-20 08:01:28,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 24 transitions. [2020-10-20 08:01:28,420 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 24 transitions. Stem has 52 letters. Loop has 8 letters. [2020-10-20 08:01:28,421 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:28,421 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-20 08:01:28,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:28,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:28,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-20 08:01:28,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:28,511 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:28,513 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:28,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:28,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-20 08:01:28,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:28,686 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 5 [2020-10-20 08:01:28,711 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 08:01:28,711 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 08:01:28,711 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 809 states and 955 transitions. cyclomatic complexity: 155 Second operand 8 states. [2020-10-20 08:01:28,860 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 809 states and 955 transitions. cyclomatic complexity: 155. Second operand 8 states. Result 1195 states and 1399 transitions. Complement of second has 32 states. [2020-10-20 08:01:28,861 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 08:01:28,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-20 08:01:28,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 43 transitions. [2020-10-20 08:01:28,861 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 43 transitions. Stem has 52 letters. Loop has 8 letters. [2020-10-20 08:01:28,862 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:28,862 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 43 transitions. Stem has 60 letters. Loop has 8 letters. [2020-10-20 08:01:28,862 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:28,862 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 43 transitions. Stem has 52 letters. Loop has 16 letters. [2020-10-20 08:01:28,863 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:28,863 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1195 states and 1399 transitions. [2020-10-20 08:01:28,869 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 156 [2020-10-20 08:01:28,876 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1195 states to 848 states and 1007 transitions. [2020-10-20 08:01:28,876 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 346 [2020-10-20 08:01:28,877 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 378 [2020-10-20 08:01:28,877 INFO L73 IsDeterministic]: Start isDeterministic. Operand 848 states and 1007 transitions. [2020-10-20 08:01:28,877 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 08:01:28,877 INFO L691 BuchiCegarLoop]: Abstraction has 848 states and 1007 transitions. [2020-10-20 08:01:28,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 848 states and 1007 transitions. [2020-10-20 08:01:28,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 848 to 816. [2020-10-20 08:01:28,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 816 states. [2020-10-20 08:01:28,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 816 states to 816 states and 960 transitions. [2020-10-20 08:01:28,897 INFO L714 BuchiCegarLoop]: Abstraction has 816 states and 960 transitions. [2020-10-20 08:01:28,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 08:01:28,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-20 08:01:28,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2020-10-20 08:01:28,898 INFO L87 Difference]: Start difference. First operand 816 states and 960 transitions. Second operand 20 states. [2020-10-20 08:01:29,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 08:01:29,331 INFO L93 Difference]: Finished difference Result 599 states and 699 transitions. [2020-10-20 08:01:29,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-20 08:01:29,332 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 599 states and 699 transitions. [2020-10-20 08:01:29,336 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 21 [2020-10-20 08:01:29,341 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 599 states to 585 states and 682 transitions. [2020-10-20 08:01:29,341 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 297 [2020-10-20 08:01:29,342 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 311 [2020-10-20 08:01:29,342 INFO L73 IsDeterministic]: Start isDeterministic. Operand 585 states and 682 transitions. [2020-10-20 08:01:29,342 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 08:01:29,342 INFO L691 BuchiCegarLoop]: Abstraction has 585 states and 682 transitions. [2020-10-20 08:01:29,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states and 682 transitions. [2020-10-20 08:01:29,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 571. [2020-10-20 08:01:29,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 571 states. [2020-10-20 08:01:29,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 667 transitions. [2020-10-20 08:01:29,355 INFO L714 BuchiCegarLoop]: Abstraction has 571 states and 667 transitions. [2020-10-20 08:01:29,355 INFO L594 BuchiCegarLoop]: Abstraction has 571 states and 667 transitions. [2020-10-20 08:01:29,356 INFO L427 BuchiCegarLoop]: ======== Iteration 13============ [2020-10-20 08:01:29,356 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 571 states and 667 transitions. [2020-10-20 08:01:29,358 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 21 [2020-10-20 08:01:29,358 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 08:01:29,358 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 08:01:29,359 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [7, 7, 7, 6, 6, 5, 5, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 08:01:29,359 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 08:01:29,359 INFO L794 eck$LassoCheckResult]: Stem: 55438#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); 55431#L-1 havoc main_#res;havoc main_#t~ret11, main_~x~0, main_~result~0;main_~x~0 := 8; 55408#L39 call main_#t~ret11 := fibo1(main_~x~0);< 55409#fibo1ENTRY ~n := #in~n; 55506#L10 assume !(~n < 1); 55504#L12 assume !(1 == ~n); 55496#L15 call #t~ret7 := fibo2(~n - 1);< 55503#fibo2ENTRY ~n := #in~n; 55531#L20 assume !(~n < 1); 55530#L22 assume !(1 == ~n); 55495#L25 call #t~ret9 := fibo1(~n - 1);< 55497#fibo1ENTRY ~n := #in~n; 55743#L10 assume !(~n < 1); 55742#L12 assume !(1 == ~n); 55492#L15 call #t~ret7 := fibo2(~n - 1);< 55574#fibo2ENTRY ~n := #in~n; 55720#L20 assume !(~n < 1); 55719#L22 assume !(1 == ~n); 55558#L25 call #t~ret9 := fibo1(~n - 1);< 55560#fibo1ENTRY ~n := #in~n; 55607#L10 assume !(~n < 1); 55605#L12 assume !(1 == ~n); 55598#L15 call #t~ret7 := fibo2(~n - 1);< 55599#fibo2ENTRY ~n := #in~n; 55681#L20 assume !(~n < 1); 55677#L22 assume !(1 == ~n); 55559#L25 call #t~ret9 := fibo1(~n - 1);< 55560#fibo1ENTRY ~n := #in~n; 55611#L10 assume !(~n < 1); 55689#L12 assume !(1 == ~n); 55687#L15 call #t~ret7 := fibo2(~n - 1);< 55688#fibo2ENTRY ~n := #in~n; 55695#L20 assume !(~n < 1); 55693#L22 assume 1 == ~n;#res := 1; 55690#fibo2FINAL assume true; 55686#fibo2EXIT >#52#return; 55684#L15-1 call #t~ret8 := fibo2(~n - 2);< 55685#fibo2ENTRY ~n := #in~n; 55694#L20 assume ~n < 1;#res := 0; 55692#fibo2FINAL assume true; 55683#fibo2EXIT >#54#return; 55679#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 55675#fibo1FINAL assume true; 55645#fibo1EXIT >#48#return; 55609#L25-1 call #t~ret10 := fibo1(~n - 2);< 55610#fibo1ENTRY ~n := #in~n; 55643#L10 assume !(~n < 1); 55641#L12 assume 1 == ~n;#res := 1; 55640#fibo1FINAL assume true; 55608#fibo1EXIT >#50#return; 55606#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret10;havoc #t~ret9; 55604#fibo2FINAL assume true; 55597#fibo2EXIT >#52#return; 55581#L15-1 call #t~ret8 := fibo2(~n - 2);< 55591#fibo2ENTRY ~n := #in~n; 55590#L20 assume !(~n < 1); 55589#L22 assume !(1 == ~n); 55552#L25 call #t~ret9 := fibo1(~n - 1);< 55554#fibo1ENTRY ~n := #in~n; 55670#L10 assume !(~n < 1); 55668#L12 assume !(1 == ~n); 55416#L15 call #t~ret7 := fibo2(~n - 1);< 55667#fibo2ENTRY ~n := #in~n; 55774#L20 assume !(~n < 1); 55894#L22 assume !(1 == ~n); 55616#L25 call #t~ret9 := fibo1(~n - 1);< 55620#fibo1ENTRY ~n := #in~n; 55697#L10 assume !(~n < 1); 55696#L12 assume !(1 == ~n); 55375#L15 [2020-10-20 08:01:29,359 INFO L796 eck$LassoCheckResult]: Loop: 55375#L15 call #t~ret7 := fibo2(~n - 1);< 55651#fibo2ENTRY ~n := #in~n; 55659#L20 assume !(~n < 1); 55879#L22 assume !(1 == ~n); 55613#L25 call #t~ret9 := fibo1(~n - 1);< 55620#fibo1ENTRY ~n := #in~n; 55697#L10 assume !(~n < 1); 55696#L12 assume !(1 == ~n); 55375#L15 [2020-10-20 08:01:29,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:29,360 INFO L82 PathProgramCache]: Analyzing trace with hash 265386094, now seen corresponding path program 2 times [2020-10-20 08:01:29,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:01:29,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376346344] [2020-10-20 08:01:29,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:01:29,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:29,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-20 08:01:29,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:29,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 08:01:29,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:29,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 08:01:29,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:29,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-20 08:01:29,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:29,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-20 08:01:29,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:29,573 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 92 proven. 39 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-20 08:01:29,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376346344] [2020-10-20 08:01:29,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937881737] [2020-10-20 08:01:29,574 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 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 08:01:29,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-20 08:01:29,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 08:01:29,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-20 08:01:29,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:29,692 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 92 proven. 39 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-20 08:01:29,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 08:01:29,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 20 [2020-10-20 08:01:29,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656774817] [2020-10-20 08:01:29,695 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-20 08:01:29,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:29,696 INFO L82 PathProgramCache]: Analyzing trace with hash 1544065082, now seen corresponding path program 4 times [2020-10-20 08:01:29,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:01:29,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412149960] [2020-10-20 08:01:29,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:01:29,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:01:29,704 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:01:29,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:01:29,705 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:01:29,708 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 08:01:29,821 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 08:01:29,821 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 08:01:29,821 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 08:01:29,822 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 08:01:29,822 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-20 08:01:29,822 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:29,823 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 08:01:29,823 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 08:01:29,823 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_8-2.c_Iteration13_Loop [2020-10-20 08:01:29,823 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 08:01:29,823 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 08:01:29,824 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 08:01:29,834 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 08:01:29,837 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 08:01:29,839 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 08:01:29,841 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 08:01:29,843 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 08:01:29,845 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 08:01:29,847 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 08:01:29,850 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 08:01:29,916 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 08:01:29,916 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 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 119 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:29,919 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:01:29,919 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 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 120 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:29,945 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-20 08:01:29,945 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:01:31,156 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-20 08:01:31,158 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 08:01:31,158 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 08:01:31,158 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 08:01:31,158 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 08:01:31,158 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-20 08:01:31,158 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:31,159 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 08:01:31,159 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 08:01:31,159 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_8-2.c_Iteration13_Loop [2020-10-20 08:01:31,159 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 08:01:31,159 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 08:01:31,160 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 08:01:31,162 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 08:01:31,164 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 08:01:31,166 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 08:01:31,168 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 08:01:31,169 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 08:01:31,173 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 08:01:31,175 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 08:01:31,176 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 08:01:31,262 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 08:01:31,262 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:01:31,266 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 08:01:31,267 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:31,267 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:31,267 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:31,267 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:31,268 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:31,268 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:31,268 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 121 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:31,270 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 122 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 122 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:31,293 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 08:01:31,294 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:31,294 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:31,294 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:31,294 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:31,294 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:31,295 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:31,295 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:31,296 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 123 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 123 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:31,318 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 08:01:31,319 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:31,319 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:31,319 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:31,319 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:31,319 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:31,320 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:31,320 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:31,321 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 124 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:01:31,344 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 08:01:31,345 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:31,345 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:31,345 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:31,346 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:31,346 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:31,346 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:31,346 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:31,347 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. Waiting until toolchain timeout for monitored process 124 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 125 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 125 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:31,370 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 08:01:31,372 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:31,372 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:31,372 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:31,372 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:31,372 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:31,372 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:31,373 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:31,374 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 126 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 126 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:31,401 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 08:01:31,403 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:31,403 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:31,403 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:31,403 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:31,403 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:31,403 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:31,404 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:31,405 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 127 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 127 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:31,426 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 08:01:31,428 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:31,428 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:31,428 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:31,428 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:31,428 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:31,428 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:31,428 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:31,429 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 128 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 128 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:31,453 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 08:01:31,454 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:31,454 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:31,454 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:31,455 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:31,455 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:31,455 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:31,455 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:31,456 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 129 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:01:31,484 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 08:01:31,485 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:31,485 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:31,485 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:31,486 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts Waiting until toolchain timeout for monitored process 129 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:31,486 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:31,486 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:31,486 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:31,489 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-20 08:01:31,491 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-20 08:01:31,491 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 130 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 130 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:31,493 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-20 08:01:31,493 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-20 08:01:31,493 INFO L510 LassoAnalysis]: Proved termination. [2020-10-20 08:01:31,494 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo1_~n) = 1*fibo1_~n Supporting invariants [] [2020-10-20 08:01:31,514 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-20 08:01:31,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:31,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:31,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-20 08:01:31,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:31,620 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:31,624 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:31,626 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:31,628 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:31,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:31,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-20 08:01:31,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:31,705 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 08:01:31,705 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 08:01:31,706 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 571 states and 667 transitions. cyclomatic complexity: 102 Second operand 8 states. [2020-10-20 08:01:31,824 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 571 states and 667 transitions. cyclomatic complexity: 102. Second operand 8 states. Result 601 states and 698 transitions. Complement of second has 19 states. [2020-10-20 08:01:31,824 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 08:01:31,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-20 08:01:31,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 20 transitions. [2020-10-20 08:01:31,826 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 20 transitions. Stem has 69 letters. Loop has 8 letters. [2020-10-20 08:01:31,827 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:31,827 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-20 08:01:31,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:31,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:31,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-20 08:01:31,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:31,936 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:31,938 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:31,940 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:31,942 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:31,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:31,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-20 08:01:31,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:32,014 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 08:01:32,014 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 08:01:32,015 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 571 states and 667 transitions. cyclomatic complexity: 102 Second operand 8 states. [2020-10-20 08:01:32,158 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 571 states and 667 transitions. cyclomatic complexity: 102. Second operand 8 states. Result 601 states and 698 transitions. Complement of second has 21 states. [2020-10-20 08:01:32,159 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 08:01:32,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-20 08:01:32,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 19 transitions. [2020-10-20 08:01:32,160 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 19 transitions. Stem has 69 letters. Loop has 8 letters. [2020-10-20 08:01:32,160 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:32,160 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-20 08:01:32,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:32,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:32,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-20 08:01:32,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:32,275 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:32,277 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:32,280 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:32,282 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:32,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:32,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-20 08:01:32,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:32,345 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 08:01:32,345 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 08:01:32,345 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 571 states and 667 transitions. cyclomatic complexity: 102 Second operand 8 states. [2020-10-20 08:01:32,484 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 571 states and 667 transitions. cyclomatic complexity: 102. Second operand 8 states. Result 867 states and 975 transitions. Complement of second has 33 states. [2020-10-20 08:01:32,484 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 08:01:32,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-20 08:01:32,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 43 transitions. [2020-10-20 08:01:32,485 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 43 transitions. Stem has 69 letters. Loop has 8 letters. [2020-10-20 08:01:32,486 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:32,487 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 43 transitions. Stem has 77 letters. Loop has 8 letters. [2020-10-20 08:01:32,487 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:32,487 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 43 transitions. Stem has 69 letters. Loop has 16 letters. [2020-10-20 08:01:32,488 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:32,488 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 867 states and 975 transitions. [2020-10-20 08:01:32,493 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 21 [2020-10-20 08:01:32,497 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 867 states to 598 states and 691 transitions. [2020-10-20 08:01:32,498 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 281 [2020-10-20 08:01:32,498 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 311 [2020-10-20 08:01:32,499 INFO L73 IsDeterministic]: Start isDeterministic. Operand 598 states and 691 transitions. [2020-10-20 08:01:32,499 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 08:01:32,499 INFO L691 BuchiCegarLoop]: Abstraction has 598 states and 691 transitions. [2020-10-20 08:01:32,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states and 691 transitions. [2020-10-20 08:01:32,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 591. [2020-10-20 08:01:32,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 591 states. [2020-10-20 08:01:32,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 683 transitions. [2020-10-20 08:01:32,511 INFO L714 BuchiCegarLoop]: Abstraction has 591 states and 683 transitions. [2020-10-20 08:01:32,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 08:01:32,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-20 08:01:32,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2020-10-20 08:01:32,512 INFO L87 Difference]: Start difference. First operand 591 states and 683 transitions. Second operand 20 states. [2020-10-20 08:01:32,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 08:01:32,889 INFO L93 Difference]: Finished difference Result 605 states and 685 transitions. [2020-10-20 08:01:32,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-20 08:01:32,892 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 605 states and 685 transitions. [2020-10-20 08:01:32,895 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-10-20 08:01:32,896 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 605 states to 0 states and 0 transitions. [2020-10-20 08:01:32,896 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2020-10-20 08:01:32,896 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2020-10-20 08:01:32,896 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2020-10-20 08:01:32,896 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-20 08:01:32,897 INFO L691 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-20 08:01:32,897 INFO L714 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-20 08:01:32,897 INFO L594 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-20 08:01:32,897 INFO L427 BuchiCegarLoop]: ======== Iteration 14============ [2020-10-20 08:01:32,897 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2020-10-20 08:01:32,897 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-10-20 08:01:32,898 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2020-10-20 08:01:32,906 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 20.10 08:01:32 BoogieIcfgContainer [2020-10-20 08:01:32,906 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2020-10-20 08:01:32,909 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 08:01:32,909 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 08:01:32,910 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 08:01:32,910 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 08:00:54" (3/4) ... [2020-10-20 08:01:32,914 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-10-20 08:01:32,915 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 08:01:32,916 INFO L168 Benchmark]: Toolchain (without parser) took 38779.98 ms. Allocated memory was 40.4 MB in the beginning and 212.9 MB in the end (delta: 172.5 MB). Free memory was 19.0 MB in the beginning and 67.6 MB in the end (delta: -48.7 MB). Peak memory consumption was 123.8 MB. Max. memory is 14.3 GB. [2020-10-20 08:01:32,917 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 30.9 MB. Free memory was 7.3 MB in the beginning and 7.3 MB in the end (delta: 43.7 kB). Peak memory consumption was 43.7 kB. Max. memory is 14.3 GB. [2020-10-20 08:01:32,918 INFO L168 Benchmark]: CACSL2BoogieTranslator took 258.95 ms. Allocated memory was 40.4 MB in the beginning and 41.4 MB in the end (delta: 1.0 MB). Free memory was 18.0 MB in the beginning and 19.2 MB in the end (delta: -1.2 MB). Peak memory consumption was 8.9 MB. Max. memory is 14.3 GB. [2020-10-20 08:01:32,918 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.44 ms. Allocated memory is still 41.4 MB. Free memory was 19.2 MB in the beginning and 17.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 14.3 GB. [2020-10-20 08:01:32,919 INFO L168 Benchmark]: Boogie Preprocessor took 21.26 ms. Allocated memory is still 41.4 MB. Free memory was 17.6 MB in the beginning and 16.5 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.2 MB. Max. memory is 14.3 GB. [2020-10-20 08:01:32,919 INFO L168 Benchmark]: RCFGBuilder took 288.36 ms. Allocated memory was 41.4 MB in the beginning and 42.5 MB in the end (delta: 1.0 MB). Free memory was 16.3 MB in the beginning and 18.4 MB in the end (delta: -2.1 MB). Peak memory consumption was 6.1 MB. Max. memory is 14.3 GB. [2020-10-20 08:01:32,920 INFO L168 Benchmark]: BuchiAutomizer took 38158.33 ms. Allocated memory was 42.5 MB in the beginning and 212.9 MB in the end (delta: 170.4 MB). Free memory was 18.2 MB in the beginning and 70.5 MB in the end (delta: -52.3 MB). Peak memory consumption was 118.1 MB. Max. memory is 14.3 GB. [2020-10-20 08:01:32,920 INFO L168 Benchmark]: Witness Printer took 5.63 ms. Allocated memory is still 212.9 MB. Free memory was 70.5 MB in the beginning and 67.6 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 14.3 GB. [2020-10-20 08:01:32,924 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 30.9 MB. Free memory was 7.3 MB in the beginning and 7.3 MB in the end (delta: 43.7 kB). Peak memory consumption was 43.7 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 258.95 ms. Allocated memory was 40.4 MB in the beginning and 41.4 MB in the end (delta: 1.0 MB). Free memory was 18.0 MB in the beginning and 19.2 MB in the end (delta: -1.2 MB). Peak memory consumption was 8.9 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 35.44 ms. Allocated memory is still 41.4 MB. Free memory was 19.2 MB in the beginning and 17.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 21.26 ms. Allocated memory is still 41.4 MB. Free memory was 17.6 MB in the beginning and 16.5 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.2 MB. Max. memory is 14.3 GB. * RCFGBuilder took 288.36 ms. Allocated memory was 41.4 MB in the beginning and 42.5 MB in the end (delta: 1.0 MB). Free memory was 16.3 MB in the beginning and 18.4 MB in the end (delta: -2.1 MB). Peak memory consumption was 6.1 MB. Max. memory is 14.3 GB. * BuchiAutomizer took 38158.33 ms. Allocated memory was 42.5 MB in the beginning and 212.9 MB in the end (delta: 170.4 MB). Free memory was 18.2 MB in the beginning and 70.5 MB in the end (delta: -52.3 MB). Peak memory consumption was 118.1 MB. Max. memory is 14.3 GB. * Witness Printer took 5.63 ms. Allocated memory is still 212.9 MB. Free memory was 70.5 MB in the beginning and 67.6 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. 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 20 terminating modules (12 trivial, 3 deterministic, 5 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 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 11 locations. One nondeterministic module has affine ranking function n and consists of 8 locations. One nondeterministic module has affine ranking function n and consists of 8 locations. 12 modules have a trivial ranking function, the largest among these consists of 24 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 38.0s and 14 iterations. TraceHistogramMax:10. Analysis of lassos took 20.7s. Construction of modules took 4.5s. Büchi inclusion checks took 10.5s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 19. Automata minimization 1.0s AutomataMinimizationTime, 19 MinimizatonAttempts, 1733 StatesRemovedByMinimization, 19 NontrivialMinimizations. Non-live state removal took 0.8s Buchi closure took 0.0s. Biggest automaton had 3231 states and ocurred in iteration 7. Nontrivial modules had stage [3, 0, 4, 1, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 1/22 HoareTripleCheckerStatistics: 726 SDtfs, 1830 SDslu, 2110 SDs, 0 SdLazy, 5154 SolverSat, 1072 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.5s Time LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT1 conc0 concLT0 SILN0 SILU0 SILI5 SILT7 lasso0 LassoPreprocessingBenchmarks: Lassos: inital21 mio100 ax100 hnf82 lsp92 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq188 hnf93 smp75 dnf100 smp100 tf109 neg96 sie107 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 20ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 33 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 8 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 9.5s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...