./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/recursive-simple/fibo_10-2.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_10-2.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 483e7d170ed0643447e075c470cba29c0e69d3cf ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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 08:00:30,987 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 08:00:30,990 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 08:00:31,031 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 08:00:31,031 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 08:00:31,041 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 08:00:31,044 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 08:00:31,048 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 08:00:31,050 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 08:00:31,055 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 08:00:31,057 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 08:00:31,058 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 08:00:31,059 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 08:00:31,063 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 08:00:31,065 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 08:00:31,067 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 08:00:31,068 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 08:00:31,069 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 08:00:31,072 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 08:00:31,080 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 08:00:31,082 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 08:00:31,084 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 08:00:31,087 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 08:00:31,088 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 08:00:31,100 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 08:00:31,100 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 08:00:31,100 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 08:00:31,101 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 08:00:31,102 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 08:00:31,103 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 08:00:31,103 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 08:00:31,103 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 08:00:31,107 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 08:00:31,108 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 08:00:31,112 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 08:00:31,113 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 08:00:31,113 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 08:00:31,114 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 08:00:31,114 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 08:00:31,115 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 08:00:31,118 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 08:00:31,118 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-32bit-Automizer_Default.epf [2020-10-20 08:00:31,164 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 08:00:31,164 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 08:00:31,165 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 08:00:31,165 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 08:00:31,165 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 08:00:31,166 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2020-10-20 08:00:31,166 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2020-10-20 08:00:31,166 INFO L138 SettingsManager]: * Use old map elimination=false [2020-10-20 08:00:31,166 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2020-10-20 08:00:31,166 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2020-10-20 08:00:31,167 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2020-10-20 08:00:31,167 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 08:00:31,167 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-20 08:00:31,167 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-10-20 08:00:31,167 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-20 08:00:31,167 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-20 08:00:31,168 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 08:00:31,168 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2020-10-20 08:00:31,168 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2020-10-20 08:00:31,168 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2020-10-20 08:00:31,168 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-20 08:00:31,169 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-20 08:00:31,169 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2020-10-20 08:00:31,169 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 08:00:31,169 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2020-10-20 08:00:31,169 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 08:00:31,170 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 08:00:31,170 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2020-10-20 08:00:31,170 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 08:00:31,170 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-20 08:00:31,170 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 08:00:31,170 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2020-10-20 08:00:31,171 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2020-10-20 08:00:31,172 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 -> 483e7d170ed0643447e075c470cba29c0e69d3cf [2020-10-20 08:00:31,377 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 08:00:31,389 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 08:00:31,393 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 08:00:31,395 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 08:00:31,395 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 08:00:31,396 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/fibo_10-2.c [2020-10-20 08:00:31,459 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/97555902f/f34f9ce1a78d4c6c9b256e9b01e48d46/FLAG0da6741c3 [2020-10-20 08:00:31,906 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 08:00:31,907 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_10-2.c [2020-10-20 08:00:31,914 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/97555902f/f34f9ce1a78d4c6c9b256e9b01e48d46/FLAG0da6741c3 [2020-10-20 08:00:32,255 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/97555902f/f34f9ce1a78d4c6c9b256e9b01e48d46 [2020-10-20 08:00:32,258 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 08:00:32,265 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-20 08:00:32,267 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 08:00:32,267 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 08:00:32,270 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 08:00:32,271 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 08:00:32" (1/1) ... [2020-10-20 08:00:32,275 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50feb8d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 08:00:32, skipping insertion in model container [2020-10-20 08:00:32,276 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 08:00:32" (1/1) ... [2020-10-20 08:00:32,285 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 08:00:32,305 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 08:00:32,551 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 08:00:32,568 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 08:00:32,584 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 08:00:32,599 INFO L208 MainTranslator]: Completed translation [2020-10-20 08:00:32,599 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 08:00:32 WrapperNode [2020-10-20 08:00:32,599 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 08:00:32,600 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-20 08:00:32,600 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-20 08:00:32,600 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-20 08:00:32,610 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 08:00:32" (1/1) ... [2020-10-20 08:00:32,617 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 08:00:32" (1/1) ... [2020-10-20 08:00:32,637 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-20 08:00:32,637 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 08:00:32,637 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 08:00:32,638 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 08:00:32,647 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 08:00:32" (1/1) ... [2020-10-20 08:00:32,648 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 08:00:32" (1/1) ... [2020-10-20 08:00:32,649 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 08:00:32" (1/1) ... [2020-10-20 08:00:32,649 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 08:00:32" (1/1) ... [2020-10-20 08:00:32,653 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 08:00:32" (1/1) ... [2020-10-20 08:00:32,655 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 08:00:32" (1/1) ... [2020-10-20 08:00:32,656 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 08:00:32" (1/1) ... [2020-10-20 08:00:32,658 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 08:00:32,658 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 08:00:32,658 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 08:00:32,658 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 08:00:32,659 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 08:00:32" (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 08:00:32,722 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 08:00:32,722 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 08:00:32,723 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-20 08:00:32,723 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-20 08:00:32,723 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2020-10-20 08:00:32,723 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2020-10-20 08:00:32,937 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 08:00:32,937 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-20 08:00:32,940 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 08:00:32 BoogieIcfgContainer [2020-10-20 08:00:32,940 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 08:00:32,941 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2020-10-20 08:00:32,941 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2020-10-20 08:00:32,945 INFO L275 PluginConnector]: BuchiAutomizer initialized [2020-10-20 08:00:32,946 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-20 08:00:32,946 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 20.10 08:00:32" (1/3) ... [2020-10-20 08:00:32,948 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@2ed82ecc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 20.10 08:00:32, skipping insertion in model container [2020-10-20 08:00:32,948 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-20 08:00:32,949 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 08:00:32" (2/3) ... [2020-10-20 08:00:32,949 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@2ed82ecc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 20.10 08:00:32, skipping insertion in model container [2020-10-20 08:00:32,949 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-20 08:00:32,950 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 08:00:32" (3/3) ... [2020-10-20 08:00:32,951 INFO L373 chiAutomizerObserver]: Analyzing ICFG fibo_10-2.c [2020-10-20 08:00:33,004 INFO L359 BuchiCegarLoop]: Interprodecural is true [2020-10-20 08:00:33,004 INFO L360 BuchiCegarLoop]: Hoare is false [2020-10-20 08:00:33,005 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2020-10-20 08:00:33,005 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 08:00:33,005 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 08:00:33,005 INFO L364 BuchiCegarLoop]: Difference is false [2020-10-20 08:00:33,005 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 08:00:33,006 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2020-10-20 08:00:33,030 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 19 states. [2020-10-20 08:00:33,066 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-10-20 08:00:33,066 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 08:00:33,067 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 08:00:33,076 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2020-10-20 08:00:33,077 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-10-20 08:00:33,077 INFO L427 BuchiCegarLoop]: ======== Iteration 1============ [2020-10-20 08:00:33,077 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 19 states. [2020-10-20 08:00:33,080 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-10-20 08:00:33,080 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 08:00:33,081 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 08:00:33,081 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2020-10-20 08:00:33,082 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-10-20 08:00:33,092 INFO L794 eck$LassoCheckResult]: Stem: 13#ULTIMATE.startENTRYtrue #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(12);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 11#L-1true havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 10; 8#L27true call main_#t~ret9 := fibo(main_~x~0);< 16#fiboENTRYtrue [2020-10-20 08:00:33,093 INFO L796 eck$LassoCheckResult]: Loop: 16#fiboENTRYtrue ~n := #in~n; 14#L8true assume !(~n < 1); 18#L10true assume !(1 == ~n); 7#L13true call #t~ret7 := fibo(~n - 1);< 16#fiboENTRYtrue [2020-10-20 08:00:33,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:33,100 INFO L82 PathProgramCache]: Analyzing trace with hash 29885, now seen corresponding path program 1 times [2020-10-20 08:00:33,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:00:33,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912799291] [2020-10-20 08:00:33,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:00:33,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:00:33,229 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:00:33,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:00:33,247 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:00:33,274 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 08:00:33,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:33,279 INFO L82 PathProgramCache]: Analyzing trace with hash 1512524, now seen corresponding path program 1 times [2020-10-20 08:00:33,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:00:33,280 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198157938] [2020-10-20 08:00:33,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:00:33,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:00:33,286 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:00:33,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:00:33,290 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:00:33,292 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 08:00:33,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:33,295 INFO L82 PathProgramCache]: Analyzing trace with hash 1830210312, now seen corresponding path program 1 times [2020-10-20 08:00:33,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:00:33,296 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660847591] [2020-10-20 08:00:33,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:00:33,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:00:33,314 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:00:33,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:00:33,340 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:00:33,345 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 08:00:33,454 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 08:00:33,455 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 08:00:33,455 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 08:00:33,455 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 08:00:33,455 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-20 08:00:33,456 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:33,456 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 08:00:33,456 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 08:00:33,456 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-2.c_Iteration1_Loop [2020-10-20 08:00:33,456 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 08:00:33,457 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 08:00:33,478 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:33,485 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:33,489 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 08:00:33,492 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:33,496 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:33,591 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 08:00:33,592 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 08:00:33,614 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:33,615 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:00:33,628 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:00:33,628 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_~n=0} Honda state: {fibo_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:33,668 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:00:33,668 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:00:33,673 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:00:33,673 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:00:33,716 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:00:33,716 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 08:00:33,721 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:00:33,721 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret7=0} Honda state: {fibo_#t~ret7=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 08:00:33,755 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:00:33,756 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:00:33,764 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:00:33,764 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret8=0} Honda state: {fibo_#t~ret8=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 08:00:33,789 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:00:33,789 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:33,829 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-20 08:00:33,829 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:00:33,857 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-20 08:00:33,859 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 08:00:33,860 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 08:00:33,860 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 08:00:33,860 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 08:00:33,860 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-20 08:00:33,860 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:33,861 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 08:00:33,861 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 08:00:33,861 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-2.c_Iteration1_Loop [2020-10-20 08:00:33,861 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 08:00:33,861 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 08:00:33,863 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:33,867 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:33,870 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:33,873 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:33,876 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:33,929 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 08:00:33,935 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:00:33,947 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 08:00:33,950 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:00:33,950 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:00:33,951 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:00:33,951 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:00:33,951 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:00:33,954 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:00:33,954 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:33,957 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:00:34,009 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 08:00:34,011 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:00:34,012 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:00:34,012 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:00:34,012 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:00:34,012 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:00:34,013 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:00:34,013 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:34,016 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:00:34,067 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 08:00:34,069 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:00:34,069 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:00:34,069 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:00:34,070 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:00:34,070 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:00:34,071 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:00:34,071 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:00:34,085 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. Waiting until toolchain timeout for monitored process 10 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 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:00:34,132 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 08:00:34,135 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:00:34,136 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:00:34,136 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:00:34,136 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:00:34,136 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:00:34,138 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:00:34,138 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:34,142 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:00:34,191 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 08:00:34,193 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:00:34,194 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:00:34,194 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:00:34,194 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:00:34,194 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:00:34,195 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:00:34,196 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:34,202 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-20 08:00:34,209 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-20 08:00:34,209 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:00:34,219 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-20 08:00:34,219 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-20 08:00:34,220 INFO L510 LassoAnalysis]: Proved termination. Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:34,220 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_#in~n) = 1*fibo_#in~n Supporting invariants [] [2020-10-20 08:00:34,259 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-20 08:00:34,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:34,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:34,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-20 08:00:34,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:34,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:34,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-20 08:00:34,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:34,378 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 08:00:34,396 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2020-10-20 08:00:34,398 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 19 states. Second operand 4 states. [2020-10-20 08:00:34,596 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 19 states.. Second operand 4 states. Result 49 states and 61 transitions. Complement of second has 12 states. [2020-10-20 08:00:34,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2020-10-20 08:00:34,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-20 08:00:34,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 11 transitions. [2020-10-20 08:00:34,601 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 3 letters. Loop has 4 letters. [2020-10-20 08:00:34,603 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:00:34,603 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 7 letters. Loop has 4 letters. [2020-10-20 08:00:34,603 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:00:34,603 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 3 letters. Loop has 8 letters. [2020-10-20 08:00:34,604 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:00:34,604 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 49 states and 61 transitions. [2020-10-20 08:00:34,610 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-10-20 08:00:34,617 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 49 states to 25 states and 34 transitions. [2020-10-20 08:00:34,619 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 17 [2020-10-20 08:00:34,619 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 18 [2020-10-20 08:00:34,620 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 34 transitions. [2020-10-20 08:00:34,620 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 08:00:34,620 INFO L691 BuchiCegarLoop]: Abstraction has 25 states and 34 transitions. [2020-10-20 08:00:34,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states and 34 transitions. [2020-10-20 08:00:34,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 20. [2020-10-20 08:00:34,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-20 08:00:34,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 26 transitions. [2020-10-20 08:00:34,655 INFO L714 BuchiCegarLoop]: Abstraction has 20 states and 26 transitions. [2020-10-20 08:00:34,655 INFO L594 BuchiCegarLoop]: Abstraction has 20 states and 26 transitions. [2020-10-20 08:00:34,655 INFO L427 BuchiCegarLoop]: ======== Iteration 2============ [2020-10-20 08:00:34,656 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 20 states and 26 transitions. [2020-10-20 08:00:34,657 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-10-20 08:00:34,657 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 08:00:34,657 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 08:00:34,658 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 08:00:34,658 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 08:00:34,659 INFO L794 eck$LassoCheckResult]: Stem: 132#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(12);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 130#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 10; 128#L27 call main_#t~ret9 := fibo(main_~x~0);< 138#fiboENTRY ~n := #in~n; 136#L8 assume !(~n < 1); 137#L10 assume !(1 == ~n); 125#L13 call #t~ret7 := fibo(~n - 1);< 131#fiboENTRY ~n := #in~n; 133#L8 assume ~n < 1;#res := 0; 134#fiboFINAL assume true; 124#fiboEXIT >#35#return; 126#L13-1 [2020-10-20 08:00:34,659 INFO L796 eck$LassoCheckResult]: Loop: 126#L13-1 call #t~ret8 := fibo(~n - 2);< 129#fiboENTRY ~n := #in~n; 143#L8 assume !(~n < 1); 142#L10 assume !(1 == ~n); 127#L13 call #t~ret7 := fibo(~n - 1);< 129#fiboENTRY ~n := #in~n; 143#L8 assume ~n < 1;#res := 0; 140#fiboFINAL assume true; 141#fiboEXIT >#35#return; 126#L13-1 [2020-10-20 08:00:34,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:34,659 INFO L82 PathProgramCache]: Analyzing trace with hash 523436175, now seen corresponding path program 1 times [2020-10-20 08:00:34,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:00:34,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658948850] [2020-10-20 08:00:34,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:00:34,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:34,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-20 08:00:34,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:34,758 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 08:00:34,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658948850] [2020-10-20 08:00:34,759 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 08:00:34,760 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-20 08:00:34,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031847477] [2020-10-20 08:00:34,763 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-20 08:00:34,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:34,764 INFO L82 PathProgramCache]: Analyzing trace with hash 1950983701, now seen corresponding path program 1 times [2020-10-20 08:00:34,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:00:34,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473380759] [2020-10-20 08:00:34,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:00:34,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:34,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-20 08:00:34,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:34,808 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-20 08:00:34,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473380759] [2020-10-20 08:00:34,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 08:00:34,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-20 08:00:34,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10315985] [2020-10-20 08:00:34,810 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-10-20 08:00:34,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 08:00:34,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-20 08:00:34,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-20 08:00:34,814 INFO L87 Difference]: Start difference. First operand 20 states and 26 transitions. cyclomatic complexity: 8 Second operand 6 states. [2020-10-20 08:00:34,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 08:00:34,899 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2020-10-20 08:00:34,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-20 08:00:34,900 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 26 states and 32 transitions. [2020-10-20 08:00:34,902 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-10-20 08:00:34,903 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 26 states to 24 states and 30 transitions. [2020-10-20 08:00:34,903 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 20 [2020-10-20 08:00:34,904 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 20 [2020-10-20 08:00:34,904 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 30 transitions. [2020-10-20 08:00:34,904 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 08:00:34,904 INFO L691 BuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2020-10-20 08:00:34,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states and 30 transitions. [2020-10-20 08:00:34,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-20 08:00:34,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-20 08:00:34,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2020-10-20 08:00:34,909 INFO L714 BuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2020-10-20 08:00:34,910 INFO L594 BuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2020-10-20 08:00:34,910 INFO L427 BuchiCegarLoop]: ======== Iteration 3============ [2020-10-20 08:00:34,910 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 24 states and 30 transitions. [2020-10-20 08:00:34,911 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-10-20 08:00:34,911 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 08:00:34,911 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 08:00:34,912 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 08:00:34,913 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2020-10-20 08:00:34,913 INFO L794 eck$LassoCheckResult]: Stem: 205#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(12);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 200#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 10; 201#L27 call main_#t~ret9 := fibo(main_~x~0);< 208#fiboENTRY ~n := #in~n; 211#L8 assume !(~n < 1); 212#L10 assume !(1 == ~n); 198#L13 call #t~ret7 := fibo(~n - 1);< 204#fiboENTRY ~n := #in~n; 209#L8 assume !(~n < 1); 210#L10 assume 1 == ~n;#res := 1; 213#fiboFINAL assume true; 197#fiboEXIT >#35#return; 199#L13-1 [2020-10-20 08:00:34,913 INFO L796 eck$LassoCheckResult]: Loop: 199#L13-1 call #t~ret8 := fibo(~n - 2);< 203#fiboENTRY ~n := #in~n; 218#L8 assume !(~n < 1); 217#L10 assume !(1 == ~n); 202#L13 call #t~ret7 := fibo(~n - 1);< 203#fiboENTRY ~n := #in~n; 218#L8 assume !(~n < 1); 217#L10 assume !(1 == ~n); 202#L13 call #t~ret7 := fibo(~n - 1);< 203#fiboENTRY ~n := #in~n; 218#L8 assume !(~n < 1); 217#L10 assume 1 == ~n;#res := 1; 206#fiboFINAL assume true; 207#fiboEXIT >#35#return; 199#L13-1 call #t~ret8 := fibo(~n - 2);< 203#fiboENTRY ~n := #in~n; 218#L8 assume ~n < 1;#res := 0; 219#fiboFINAL assume true; 216#fiboEXIT >#37#return; 214#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 215#fiboFINAL assume true; 220#fiboEXIT >#35#return; 199#L13-1 [2020-10-20 08:00:34,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:34,913 INFO L82 PathProgramCache]: Analyzing trace with hash -953322862, now seen corresponding path program 1 times [2020-10-20 08:00:34,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:00:34,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093721646] [2020-10-20 08:00:34,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:00:34,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:34,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-20 08:00:34,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:34,973 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 08:00:34,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093721646] [2020-10-20 08:00:34,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389765419] [2020-10-20 08:00:34,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 08:00:35,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:35,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-20 08:00:35,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:35,054 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 08:00:35,055 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 08:00:35,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-20 08:00:35,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868447284] [2020-10-20 08:00:35,056 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-20 08:00:35,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:35,056 INFO L82 PathProgramCache]: Analyzing trace with hash -2000232554, now seen corresponding path program 1 times [2020-10-20 08:00:35,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:00:35,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118405726] [2020-10-20 08:00:35,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:00:35,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:00:35,067 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:00:35,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:00:35,075 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:00:35,078 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 08:00:35,310 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 08:00:35,311 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 08:00:35,311 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 08:00:35,311 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 08:00:35,311 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-20 08:00:35,311 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:35,311 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 08:00:35,311 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 08:00:35,311 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-2.c_Iteration3_Loop [2020-10-20 08:00:35,312 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 08:00:35,312 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 08:00:35,313 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:35,317 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:35,320 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:35,322 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:35,373 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 08:00:35,373 INFO L404 LassoAnalysis]: Checking for nontermination... 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) [2020-10-20 08:00:35,380 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:00:35,380 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:35,384 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:00:35,385 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret7=1} Honda state: {fibo_#t~ret7=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:00:35,432 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:00:35,432 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:35,436 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:00:35,437 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:00:35,491 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:00:35,492 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:35,496 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:00:35,497 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret8=0} Honda state: {fibo_#t~ret8=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:00:35,550 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:00:35,551 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 18 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 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:00:35,603 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-20 08:00:35,603 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:36,529 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-20 08:00:36,532 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 08:00:36,532 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 08:00:36,532 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 08:00:36,532 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 08:00:36,532 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-20 08:00:36,532 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:36,533 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 08:00:36,533 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 08:00:36,533 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-2.c_Iteration3_Loop [2020-10-20 08:00:36,533 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 08:00:36,533 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 08:00:36,534 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:36,537 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:36,539 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:36,547 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:36,603 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 08:00:36,603 INFO L489 LassoAnalysis]: Using template 'affine'. 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 08:00:36,617 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 08:00:36,619 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:00:36,619 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:00:36,619 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:00:36,619 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:00:36,619 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:00:36,620 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:00:36,620 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:00:36,621 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 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 08:00:36,661 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 08:00:36,663 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:00:36,663 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:00:36,664 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:00:36,664 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:00:36,664 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:00:36,664 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:00:36,665 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:00:36,671 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 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:00:36,722 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 08:00:36,724 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:00:36,724 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:00:36,725 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:00:36,725 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:00:36,725 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:00:36,727 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:00:36,727 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:36,731 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-20 08:00:36,739 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-20 08:00:36,739 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 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:00:36,745 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-20 08:00:36,745 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-20 08:00:36,745 INFO L510 LassoAnalysis]: Proved termination. [2020-10-20 08:00:36,745 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:36,780 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-20 08:00:36,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:36,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:36,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-20 08:00:36,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:36,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:36,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-20 08:00:36,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:37,041 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-20 08:00:37,042 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 7 loop predicates [2020-10-20 08:00:37,043 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 24 states and 30 transitions. cyclomatic complexity: 8 Second operand 9 states. [2020-10-20 08:00:37,344 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 24 states and 30 transitions. cyclomatic complexity: 8. Second operand 9 states. Result 159 states and 215 transitions. Complement of second has 48 states. [2020-10-20 08:00:37,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 10 states 2 stem states 7 non-accepting loop states 1 accepting loop states [2020-10-20 08:00:37,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-10-20 08:00:37,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 41 transitions. [2020-10-20 08:00:37,347 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 41 transitions. Stem has 12 letters. Loop has 22 letters. [2020-10-20 08:00:37,348 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:00:37,348 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 41 transitions. Stem has 34 letters. Loop has 22 letters. [2020-10-20 08:00:37,349 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:00:37,350 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 41 transitions. Stem has 12 letters. Loop has 44 letters. [2020-10-20 08:00:37,351 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:00:37,351 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 159 states and 215 transitions. [2020-10-20 08:00:37,360 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 15 [2020-10-20 08:00:37,367 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 159 states to 128 states and 180 transitions. [2020-10-20 08:00:37,367 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 74 [2020-10-20 08:00:37,368 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 79 [2020-10-20 08:00:37,368 INFO L73 IsDeterministic]: Start isDeterministic. Operand 128 states and 180 transitions. [2020-10-20 08:00:37,369 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 08:00:37,369 INFO L691 BuchiCegarLoop]: Abstraction has 128 states and 180 transitions. [2020-10-20 08:00:37,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states and 180 transitions. [2020-10-20 08:00:37,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 106. [2020-10-20 08:00:37,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-20 08:00:37,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 140 transitions. [2020-10-20 08:00:37,388 INFO L714 BuchiCegarLoop]: Abstraction has 106 states and 140 transitions. [2020-10-20 08:00:37,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 08:00:37,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-20 08:00:37,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-20 08:00:37,389 INFO L87 Difference]: Start difference. First operand 106 states and 140 transitions. Second operand 8 states. [2020-10-20 08:00:37,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 08:00:37,496 INFO L93 Difference]: Finished difference Result 125 states and 167 transitions. [2020-10-20 08:00:37,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-20 08:00:37,497 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 125 states and 167 transitions. [2020-10-20 08:00:37,501 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 15 [2020-10-20 08:00:37,505 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 125 states to 122 states and 164 transitions. [2020-10-20 08:00:37,505 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 77 [2020-10-20 08:00:37,506 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 77 [2020-10-20 08:00:37,506 INFO L73 IsDeterministic]: Start isDeterministic. Operand 122 states and 164 transitions. [2020-10-20 08:00:37,507 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 08:00:37,507 INFO L691 BuchiCegarLoop]: Abstraction has 122 states and 164 transitions. [2020-10-20 08:00:37,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states and 164 transitions. [2020-10-20 08:00:37,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 106. [2020-10-20 08:00:37,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-20 08:00:37,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 139 transitions. [2020-10-20 08:00:37,520 INFO L714 BuchiCegarLoop]: Abstraction has 106 states and 139 transitions. [2020-10-20 08:00:37,520 INFO L594 BuchiCegarLoop]: Abstraction has 106 states and 139 transitions. [2020-10-20 08:00:37,521 INFO L427 BuchiCegarLoop]: ======== Iteration 4============ [2020-10-20 08:00:37,521 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 106 states and 139 transitions. [2020-10-20 08:00:37,523 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 15 [2020-10-20 08:00:37,523 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 08:00:37,524 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 08:00:37,526 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [5, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 08:00:37,527 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1] [2020-10-20 08:00:37,527 INFO L794 eck$LassoCheckResult]: Stem: 864#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(12);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 859#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 10; 842#L27 call main_#t~ret9 := fibo(main_~x~0);< 873#fiboENTRY ~n := #in~n; 910#L8 assume !(~n < 1); 882#L10 assume !(1 == ~n); 862#L13 call #t~ret7 := fibo(~n - 1);< 863#fiboENTRY ~n := #in~n; 867#L8 assume !(~n < 1); 869#L10 assume !(1 == ~n); 868#L13 call #t~ret7 := fibo(~n - 1);< 863#fiboENTRY ~n := #in~n; 867#L8 assume !(~n < 1); 869#L10 assume !(1 == ~n); 868#L13 call #t~ret7 := fibo(~n - 1);< 863#fiboENTRY ~n := #in~n; 879#L8 assume !(~n < 1); 909#L10 assume 1 == ~n;#res := 1; 908#fiboFINAL assume true; 907#fiboEXIT >#35#return; 845#L13-1 call #t~ret8 := fibo(~n - 2);< 905#fiboENTRY ~n := #in~n; 912#L8 assume ~n < 1;#res := 0; 945#fiboFINAL assume true; 944#fiboEXIT >#37#return; 941#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 940#fiboFINAL assume true; 938#fiboEXIT >#35#return; 861#L13-1 [2020-10-20 08:00:37,527 INFO L796 eck$LassoCheckResult]: Loop: 861#L13-1 call #t~ret8 := fibo(~n - 2);< 843#fiboENTRY ~n := #in~n; 933#L8 assume !(~n < 1); 880#L10 assume !(1 == ~n); 860#L13 call #t~ret7 := fibo(~n - 1);< 843#fiboENTRY ~n := #in~n; 933#L8 assume !(~n < 1); 880#L10 assume 1 == ~n;#res := 1; 881#fiboFINAL assume true; 935#fiboEXIT >#35#return; 861#L13-1 [2020-10-20 08:00:37,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:37,528 INFO L82 PathProgramCache]: Analyzing trace with hash 1335554545, now seen corresponding path program 1 times [2020-10-20 08:00:37,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:00:37,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179007940] [2020-10-20 08:00:37,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:00:37,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:37,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-20 08:00:37,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:37,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 08:00:37,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:37,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-20 08:00:37,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:37,636 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-20 08:00:37,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179007940] [2020-10-20 08:00:37,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230018853] [2020-10-20 08:00:37,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 08:00:37,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:37,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-20 08:00:37,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:37,729 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-20 08:00:37,729 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 08:00:37,729 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-20 08:00:37,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018448792] [2020-10-20 08:00:37,731 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-20 08:00:37,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:37,731 INFO L82 PathProgramCache]: Analyzing trace with hash 350977484, now seen corresponding path program 1 times [2020-10-20 08:00:37,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:00:37,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813963192] [2020-10-20 08:00:37,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:00:37,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:00:37,737 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:00:37,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:00:37,740 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:00:37,742 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 08:00:37,851 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 08:00:37,851 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 08:00:37,851 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 08:00:37,851 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 08:00:37,851 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-20 08:00:37,851 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:37,851 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 08:00:37,851 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 08:00:37,852 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-2.c_Iteration4_Loop [2020-10-20 08:00:37,852 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 08:00:37,852 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 08:00:37,853 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:37,860 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:37,867 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:37,870 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:37,909 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 08:00:37,909 INFO L404 LassoAnalysis]: Checking for nontermination... 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) [2020-10-20 08:00:37,915 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:00:37,915 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:37,922 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:00:37,922 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:37,949 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:00:37,949 INFO L160 nArgumentSynthesizer]: Using integer mode. 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 08:00:37,977 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-20 08:00:37,977 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:00:39,080 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-20 08:00:39,082 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 08:00:39,082 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 08:00:39,082 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 08:00:39,083 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 08:00:39,083 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-20 08:00:39,083 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:39,083 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 08:00:39,083 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 08:00:39,083 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-2.c_Iteration4_Loop [2020-10-20 08:00:39,083 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 08:00:39,083 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 08:00:39,084 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:39,087 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:39,101 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 08:00:39,104 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 08:00:39,148 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 08:00:39,149 INFO L489 LassoAnalysis]: Using template 'affine'. 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) [2020-10-20 08:00:39,155 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 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:39,157 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:00:39,157 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:00:39,157 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:00:39,157 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:00:39,158 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:00:39,158 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:00:39,158 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:00:39,162 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 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 08:00:39,185 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 08:00:39,187 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:00:39,187 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:00:39,187 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:00:39,187 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:00:39,188 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:00:39,191 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:00:39,191 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:00:39,194 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-20 08:00:39,197 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-20 08:00:39,197 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 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 08:00:39,203 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-20 08:00:39,203 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-20 08:00:39,203 INFO L510 LassoAnalysis]: Proved termination. [2020-10-20 08:00:39,203 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2020-10-20 08:00:39,224 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-20 08:00:39,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:39,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:39,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-20 08:00:39,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:39,320 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:00:39,326 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:00:39,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:39,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-20 08:00:39,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:39,437 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 08:00:39,438 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 08:00:39,438 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 106 states and 139 transitions. cyclomatic complexity: 38 Second operand 8 states. [2020-10-20 08:00:39,685 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 106 states and 139 transitions. cyclomatic complexity: 38. Second operand 8 states. Result 195 states and 261 transitions. Complement of second has 33 states. [2020-10-20 08:00:39,686 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 08:00:39,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-20 08:00:39,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 37 transitions. [2020-10-20 08:00:39,687 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 37 transitions. Stem has 28 letters. Loop has 10 letters. [2020-10-20 08:00:39,687 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:00:39,687 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-20 08:00:39,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:39,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:39,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-20 08:00:39,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:39,771 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:00:39,774 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:00:39,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:39,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-20 08:00:39,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:39,852 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 08:00:39,852 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 08:00:39,852 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 106 states and 139 transitions. cyclomatic complexity: 38 Second operand 8 states. [2020-10-20 08:00:40,031 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 106 states and 139 transitions. cyclomatic complexity: 38. Second operand 8 states. Result 292 states and 393 transitions. Complement of second has 25 states. [2020-10-20 08:00:40,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2020-10-20 08:00:40,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-20 08:00:40,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 24 transitions. [2020-10-20 08:00:40,033 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 24 transitions. Stem has 28 letters. Loop has 10 letters. [2020-10-20 08:00:40,033 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:00:40,033 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-20 08:00:40,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:40,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:40,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-20 08:00:40,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:40,099 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:00:40,103 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:00:40,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:40,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-20 08:00:40,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:40,177 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 08:00:40,177 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 08:00:40,177 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 106 states and 139 transitions. cyclomatic complexity: 38 Second operand 8 states. [2020-10-20 08:00:40,459 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 106 states and 139 transitions. cyclomatic complexity: 38. Second operand 8 states. Result 810 states and 1071 transitions. Complement of second has 130 states. [2020-10-20 08:00:40,460 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 08:00:40,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-20 08:00:40,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 42 transitions. [2020-10-20 08:00:40,462 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 42 transitions. Stem has 28 letters. Loop has 10 letters. [2020-10-20 08:00:40,463 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:00:40,463 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 42 transitions. Stem has 38 letters. Loop has 10 letters. [2020-10-20 08:00:40,464 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:00:40,464 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 42 transitions. Stem has 28 letters. Loop has 20 letters. [2020-10-20 08:00:40,466 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:00:40,466 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 810 states and 1071 transitions. [2020-10-20 08:00:40,487 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 44 [2020-10-20 08:00:40,498 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 810 states to 419 states and 599 transitions. [2020-10-20 08:00:40,499 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 159 [2020-10-20 08:00:40,500 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 183 [2020-10-20 08:00:40,500 INFO L73 IsDeterministic]: Start isDeterministic. Operand 419 states and 599 transitions. [2020-10-20 08:00:40,500 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 08:00:40,501 INFO L691 BuchiCegarLoop]: Abstraction has 419 states and 599 transitions. [2020-10-20 08:00:40,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states and 599 transitions. [2020-10-20 08:00:40,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 332. [2020-10-20 08:00:40,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 332 states. [2020-10-20 08:00:40,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 449 transitions. [2020-10-20 08:00:40,538 INFO L714 BuchiCegarLoop]: Abstraction has 332 states and 449 transitions. [2020-10-20 08:00:40,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 08:00:40,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-20 08:00:40,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-20 08:00:40,540 INFO L87 Difference]: Start difference. First operand 332 states and 449 transitions. Second operand 11 states. [2020-10-20 08:00:40,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 08:00:40,792 INFO L93 Difference]: Finished difference Result 504 states and 744 transitions. [2020-10-20 08:00:40,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-20 08:00:40,793 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 504 states and 744 transitions. [2020-10-20 08:00:40,807 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-10-20 08:00:40,825 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 504 states to 502 states and 741 transitions. [2020-10-20 08:00:40,825 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 226 [2020-10-20 08:00:40,828 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 226 [2020-10-20 08:00:40,828 INFO L73 IsDeterministic]: Start isDeterministic. Operand 502 states and 741 transitions. [2020-10-20 08:00:40,828 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 08:00:40,828 INFO L691 BuchiCegarLoop]: Abstraction has 502 states and 741 transitions. [2020-10-20 08:00:40,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states and 741 transitions. [2020-10-20 08:00:40,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 456. [2020-10-20 08:00:40,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 456 states. [2020-10-20 08:00:40,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 677 transitions. [2020-10-20 08:00:40,887 INFO L714 BuchiCegarLoop]: Abstraction has 456 states and 677 transitions. [2020-10-20 08:00:40,887 INFO L594 BuchiCegarLoop]: Abstraction has 456 states and 677 transitions. [2020-10-20 08:00:40,887 INFO L427 BuchiCegarLoop]: ======== Iteration 5============ [2020-10-20 08:00:40,887 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 456 states and 677 transitions. [2020-10-20 08:00:40,891 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-10-20 08:00:40,891 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 08:00:40,891 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 08:00:40,892 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 08:00:40,893 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-10-20 08:00:40,893 INFO L794 eck$LassoCheckResult]: Stem: 3811#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(12);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 3797#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 10; 3798#L27 call main_#t~ret9 := fibo(main_~x~0);< 3819#fiboENTRY ~n := #in~n; 3864#L8 assume !(~n < 1); 3863#L10 assume !(1 == ~n); 3859#L13 call #t~ret7 := fibo(~n - 1);< 3861#fiboENTRY ~n := #in~n; 3862#L8 assume !(~n < 1); 3858#L10 assume !(1 == ~n); 3842#L13 call #t~ret7 := fibo(~n - 1);< 3855#fiboENTRY ~n := #in~n; 3856#L8 assume !(~n < 1); 3860#L10 assume !(1 == ~n); 3841#L13 call #t~ret7 := fibo(~n - 1);< 3855#fiboENTRY ~n := #in~n; 3857#L8 assume !(~n < 1); 3840#L10 assume 1 == ~n;#res := 1; 3843#fiboFINAL assume true; 3915#fiboEXIT >#35#return; 3909#L13-1 call #t~ret8 := fibo(~n - 2);< 3911#fiboENTRY ~n := #in~n; 4104#L8 assume !(~n < 1); 4031#L10 assume !(1 == ~n); 4032#L13 call #t~ret7 := fibo(~n - 1);< 4042#fiboENTRY ~n := #in~n; 4068#L8 assume !(~n < 1); 4049#L10 assume !(1 == ~n); 4050#L13 call #t~ret7 := fibo(~n - 1);< 4060#fiboENTRY [2020-10-20 08:00:40,893 INFO L796 eck$LassoCheckResult]: Loop: 4060#fiboENTRY ~n := #in~n; 4067#L8 assume !(~n < 1); 4066#L10 assume !(1 == ~n); 4059#L13 call #t~ret7 := fibo(~n - 1);< 4060#fiboENTRY [2020-10-20 08:00:40,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:40,893 INFO L82 PathProgramCache]: Analyzing trace with hash -777601154, now seen corresponding path program 1 times [2020-10-20 08:00:40,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:00:40,894 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977859079] [2020-10-20 08:00:40,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:00:40,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:40,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-20 08:00:40,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:40,982 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 30 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-20 08:00:40,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977859079] [2020-10-20 08:00:40,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771560110] [2020-10-20 08:00:40,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 08:00:41,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:41,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-20 08:00:41,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:41,075 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 30 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-20 08:00:41,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 08:00:41,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-20 08:00:41,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628446787] [2020-10-20 08:00:41,076 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-20 08:00:41,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:41,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1512524, now seen corresponding path program 2 times [2020-10-20 08:00:41,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:00:41,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130049879] [2020-10-20 08:00:41,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:00:41,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:00:41,082 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:00:41,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:00:41,084 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:00:41,086 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 08:00:41,122 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 08:00:41,122 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 08:00:41,122 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 08:00:41,122 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 08:00:41,123 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-20 08:00:41,123 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:41,123 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 08:00:41,123 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 08:00:41,123 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-2.c_Iteration5_Loop [2020-10-20 08:00:41,123 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 08:00:41,123 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 08:00:41,124 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:41,127 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:41,129 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 08:00:41,132 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:41,139 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:41,173 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 08:00:41,173 INFO L404 LassoAnalysis]: Checking for nontermination... 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) [2020-10-20 08:00:41,176 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:00:41,176 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:41,180 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:00:41,180 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 08:00:41,215 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:00:41,216 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:00:41,219 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:00:41,219 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret7=0} Honda state: {fibo_#t~ret7=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:00:41,247 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:00:41,247 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:41,249 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:00:41,250 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_~n=0} Honda state: {fibo_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:41,273 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:00:41,274 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:00:41,301 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-20 08:00:41,301 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:41,374 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-20 08:00:41,376 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 08:00:41,376 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 08:00:41,376 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 08:00:41,376 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 08:00:41,376 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-20 08:00:41,376 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:41,377 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 08:00:41,377 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 08:00:41,377 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-2.c_Iteration5_Loop [2020-10-20 08:00:41,377 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 08:00:41,377 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 08:00:41,379 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:41,381 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:41,383 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:41,385 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:41,387 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:41,427 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 08:00:41,428 INFO L489 LassoAnalysis]: Using template 'affine'. 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 08:00:41,431 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 08:00:41,432 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:00:41,432 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:00:41,433 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:00:41,433 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:00:41,433 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:00:41,433 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:00:41,433 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:00:41,435 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 38 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:00:41,458 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 38 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:41,460 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:00:41,460 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:00:41,460 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:00:41,460 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:00:41,460 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:00:41,460 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:00:41,461 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:00:41,466 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 39 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:00:41,506 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 08:00:41,508 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:00:41,508 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:00:41,508 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:00:41,508 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:00:41,508 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:00:41,517 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:00:41,517 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:00:41,519 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. Waiting until toolchain timeout for monitored process 39 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 40 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:00:41,558 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 08:00:41,559 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:00:41,560 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:00:41,560 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:00:41,560 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:00:41,560 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:00:41,561 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:00:41,561 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 40 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:41,564 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:41,589 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 08:00:41,590 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:00:41,590 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:00:41,590 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:00:41,591 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:00:41,591 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:00:41,591 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:00:41,591 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:00:41,595 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-20 08:00:41,599 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-20 08:00:41,599 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 42 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:00:41,610 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-20 08:00:41,610 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-20 08:00:41,610 INFO L510 LassoAnalysis]: Proved termination. [2020-10-20 08:00:41,610 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_#in~n) = 1*fibo_#in~n Supporting invariants [] Waiting until toolchain timeout for monitored process 42 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:41,645 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-20 08:00:41,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:41,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:41,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-20 08:00:41,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:41,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:41,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-20 08:00:41,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:41,774 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 08:00:41,775 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2020-10-20 08:00:41,775 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 456 states and 677 transitions. cyclomatic complexity: 231 Second operand 5 states. [2020-10-20 08:00:41,853 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 456 states and 677 transitions. cyclomatic complexity: 231. Second operand 5 states. Result 466 states and 687 transitions. Complement of second has 13 states. [2020-10-20 08:00:41,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2020-10-20 08:00:41,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-10-20 08:00:41,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 13 transitions. [2020-10-20 08:00:41,859 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 13 transitions. Stem has 29 letters. Loop has 4 letters. [2020-10-20 08:00:41,859 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:00:41,859 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-20 08:00:41,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:41,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:41,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-20 08:00:41,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:41,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:41,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-20 08:00:41,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:41,997 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 08:00:41,997 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 3 loop predicates [2020-10-20 08:00:41,997 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 456 states and 677 transitions. cyclomatic complexity: 231 Second operand 5 states. [2020-10-20 08:00:42,068 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 456 states and 677 transitions. cyclomatic complexity: 231. Second operand 5 states. Result 466 states and 687 transitions. Complement of second has 13 states. [2020-10-20 08:00:42,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2020-10-20 08:00:42,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-10-20 08:00:42,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 13 transitions. [2020-10-20 08:00:42,069 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 13 transitions. Stem has 29 letters. Loop has 4 letters. [2020-10-20 08:00:42,069 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:00:42,069 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-20 08:00:42,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:42,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:42,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-20 08:00:42,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:42,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:42,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-20 08:00:42,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:42,192 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 08:00:42,193 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2020-10-20 08:00:42,193 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 456 states and 677 transitions. cyclomatic complexity: 231 Second operand 5 states. [2020-10-20 08:00:42,300 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 456 states and 677 transitions. cyclomatic complexity: 231. Second operand 5 states. Result 617 states and 861 transitions. Complement of second has 14 states. [2020-10-20 08:00:42,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2020-10-20 08:00:42,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-10-20 08:00:42,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 21 transitions. [2020-10-20 08:00:42,306 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 29 letters. Loop has 4 letters. [2020-10-20 08:00:42,307 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:00:42,307 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 33 letters. Loop has 4 letters. [2020-10-20 08:00:42,308 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:00:42,308 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 29 letters. Loop has 8 letters. [2020-10-20 08:00:42,308 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:00:42,309 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 617 states and 861 transitions. [2020-10-20 08:00:42,318 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-10-20 08:00:42,326 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 617 states to 520 states and 752 transitions. [2020-10-20 08:00:42,326 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 189 [2020-10-20 08:00:42,327 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 198 [2020-10-20 08:00:42,327 INFO L73 IsDeterministic]: Start isDeterministic. Operand 520 states and 752 transitions. [2020-10-20 08:00:42,327 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 08:00:42,328 INFO L691 BuchiCegarLoop]: Abstraction has 520 states and 752 transitions. [2020-10-20 08:00:42,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states and 752 transitions. [2020-10-20 08:00:42,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 490. [2020-10-20 08:00:42,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 490 states. [2020-10-20 08:00:42,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 716 transitions. [2020-10-20 08:00:42,352 INFO L714 BuchiCegarLoop]: Abstraction has 490 states and 716 transitions. [2020-10-20 08:00:42,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 08:00:42,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-20 08:00:42,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-10-20 08:00:42,353 INFO L87 Difference]: Start difference. First operand 490 states and 716 transitions. Second operand 12 states. [2020-10-20 08:00:42,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 08:00:42,540 INFO L93 Difference]: Finished difference Result 545 states and 810 transitions. [2020-10-20 08:00:42,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-20 08:00:42,542 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 545 states and 810 transitions. [2020-10-20 08:00:42,551 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-10-20 08:00:42,561 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 545 states to 542 states and 802 transitions. [2020-10-20 08:00:42,561 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 213 [2020-10-20 08:00:42,562 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 213 [2020-10-20 08:00:42,562 INFO L73 IsDeterministic]: Start isDeterministic. Operand 542 states and 802 transitions. [2020-10-20 08:00:42,564 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 08:00:42,564 INFO L691 BuchiCegarLoop]: Abstraction has 542 states and 802 transitions. [2020-10-20 08:00:42,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states and 802 transitions. [2020-10-20 08:00:42,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 511. [2020-10-20 08:00:42,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 511 states. [2020-10-20 08:00:42,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 756 transitions. [2020-10-20 08:00:42,589 INFO L714 BuchiCegarLoop]: Abstraction has 511 states and 756 transitions. [2020-10-20 08:00:42,589 INFO L594 BuchiCegarLoop]: Abstraction has 511 states and 756 transitions. [2020-10-20 08:00:42,589 INFO L427 BuchiCegarLoop]: ======== Iteration 6============ [2020-10-20 08:00:42,589 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 511 states and 756 transitions. [2020-10-20 08:00:42,593 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-10-20 08:00:42,594 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 08:00:42,594 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 08:00:42,596 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [8, 8, 7, 6, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 08:00:42,596 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-10-20 08:00:42,596 INFO L794 eck$LassoCheckResult]: Stem: 7334#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(12);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 7329#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 10; 7325#L27 call main_#t~ret9 := fibo(main_~x~0);< 7347#fiboENTRY ~n := #in~n; 7348#L8 assume !(~n < 1); 7391#L10 assume !(1 == ~n); 7383#L13 call #t~ret7 := fibo(~n - 1);< 7384#fiboENTRY ~n := #in~n; 7393#L8 assume !(~n < 1); 7392#L10 assume !(1 == ~n); 7376#L13 call #t~ret7 := fibo(~n - 1);< 7388#fiboENTRY ~n := #in~n; 7387#L8 assume !(~n < 1); 7386#L10 assume !(1 == ~n); 7380#L13 call #t~ret7 := fibo(~n - 1);< 7385#fiboENTRY ~n := #in~n; 7515#L8 assume !(~n < 1); 7426#L10 assume !(1 == ~n); 7379#L13 call #t~ret7 := fibo(~n - 1);< 7385#fiboENTRY ~n := #in~n; 7493#L8 assume !(~n < 1); 7491#L10 assume 1 == ~n;#res := 1; 7487#fiboFINAL assume true; 7463#fiboEXIT >#35#return; 7448#L13-1 call #t~ret8 := fibo(~n - 2);< 7451#fiboENTRY ~n := #in~n; 7744#L8 assume !(~n < 1); 7741#L10 assume !(1 == ~n); 7351#L13 call #t~ret7 := fibo(~n - 1);< 7358#fiboENTRY ~n := #in~n; 7359#L8 assume !(~n < 1); 7794#L10 assume !(1 == ~n); 7363#L13 call #t~ret7 := fibo(~n - 1);< 7360#fiboENTRY ~n := #in~n; 7365#L8 assume !(~n < 1); 7374#L10 assume !(1 == ~n); 7362#L13 [2020-10-20 08:00:42,596 INFO L796 eck$LassoCheckResult]: Loop: 7362#L13 call #t~ret7 := fibo(~n - 1);< 7360#fiboENTRY ~n := #in~n; 7365#L8 assume !(~n < 1); 7374#L10 assume !(1 == ~n); 7362#L13 [2020-10-20 08:00:42,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:42,597 INFO L82 PathProgramCache]: Analyzing trace with hash 42869646, now seen corresponding path program 2 times [2020-10-20 08:00:42,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:00:42,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650474093] [2020-10-20 08:00:42,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:00:42,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:42,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-20 08:00:42,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:42,750 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 53 proven. 36 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-20 08:00:42,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650474093] [2020-10-20 08:00:42,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008298256] [2020-10-20 08:00:42,751 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 08:00:42,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-20 08:00:42,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 08:00:42,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-20 08:00:42,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:42,819 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 53 proven. 36 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-20 08:00:42,819 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 08:00:42,819 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-20 08:00:42,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117973605] [2020-10-20 08:00:42,820 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-20 08:00:42,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:42,820 INFO L82 PathProgramCache]: Analyzing trace with hash 1955414, now seen corresponding path program 3 times [2020-10-20 08:00:42,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:00:42,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248559625] [2020-10-20 08:00:42,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:00:42,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:00:42,823 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:00:42,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:00:42,824 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:00:42,825 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 08:00:42,864 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 08:00:42,864 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 08:00:42,864 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 08:00:42,864 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 08:00:42,865 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-20 08:00:42,865 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:42,865 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 08:00:42,865 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 08:00:42,865 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-2.c_Iteration6_Loop [2020-10-20 08:00:42,865 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 08:00:42,865 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 08:00:42,866 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:42,868 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:42,869 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:42,878 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:42,932 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 08:00:42,932 INFO L404 LassoAnalysis]: Checking for nontermination... 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) Waiting until toolchain timeout for monitored process 44 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:42,938 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:00:42,938 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:00:42,948 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:00:42,949 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret8=0} Honda state: {fibo_#t~ret8=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:00:42,984 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:00:42,984 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 45 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:42,988 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:00:42,988 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 08:00:43,022 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:00:43,023 INFO L160 nArgumentSynthesizer]: Using integer mode. 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) Waiting until toolchain timeout for monitored process 47 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:43,056 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-20 08:00:43,056 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:00:49,995 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-20 08:00:49,997 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 08:00:49,997 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 08:00:49,997 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 08:00:49,997 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 08:00:49,997 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-20 08:00:49,997 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:49,997 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 08:00:49,998 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 08:00:49,998 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-2.c_Iteration6_Loop [2020-10-20 08:00:49,998 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 08:00:49,998 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 08:00:49,998 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 08:00:50,000 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 08:00:50,002 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 08:00:50,012 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:50,068 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 08:00:50,068 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:50,071 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 08:00:50,073 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:00:50,073 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:00:50,073 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:00:50,073 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:00:50,073 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:00:50,074 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:00:50,074 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:00:50,075 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 08:00:50,096 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 08:00:50,097 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:00:50,097 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:00:50,098 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:00:50,098 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:00:50,098 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:00:50,098 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:00:50,098 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:00:50,099 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 08:00:50,121 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 08:00:50,122 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:00:50,123 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:00:50,123 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:00:50,123 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:00:50,123 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:00:50,124 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:00:50,124 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:00:50,127 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-20 08:00:50,136 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2020-10-20 08:00:50,136 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 51 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:00:50,138 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-20 08:00:50,139 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-20 08:00:50,139 INFO L510 LassoAnalysis]: Proved termination. [2020-10-20 08:00:50,139 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] Waiting until toolchain timeout for monitored process 51 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:50,161 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-20 08:00:50,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:50,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:50,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-20 08:00:50,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:50,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:50,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-20 08:00:50,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:50,295 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 08:00:50,295 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 4 loop predicates [2020-10-20 08:00:50,295 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 511 states and 756 transitions. cyclomatic complexity: 255 Second operand 6 states. [2020-10-20 08:00:50,366 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 511 states and 756 transitions. cyclomatic complexity: 255. Second operand 6 states. Result 523 states and 769 transitions. Complement of second has 18 states. [2020-10-20 08:00:50,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2020-10-20 08:00:50,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-20 08:00:50,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 13 transitions. [2020-10-20 08:00:50,369 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 13 transitions. Stem has 36 letters. Loop has 4 letters. [2020-10-20 08:00:50,369 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:00:50,369 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-20 08:00:50,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:50,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:50,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-20 08:00:50,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:50,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:50,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-20 08:00:50,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:50,530 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 08:00:50,530 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 4 loop predicates [2020-10-20 08:00:50,530 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 511 states and 756 transitions. cyclomatic complexity: 255 Second operand 6 states. [2020-10-20 08:00:50,638 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 511 states and 756 transitions. cyclomatic complexity: 255. Second operand 6 states. Result 753 states and 1085 transitions. Complement of second has 22 states. [2020-10-20 08:00:50,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2020-10-20 08:00:50,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-20 08:00:50,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 16 transitions. [2020-10-20 08:00:50,639 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 36 letters. Loop has 4 letters. [2020-10-20 08:00:50,639 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:00:50,640 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 40 letters. Loop has 4 letters. [2020-10-20 08:00:50,640 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:00:50,640 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 36 letters. Loop has 8 letters. [2020-10-20 08:00:50,640 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:00:50,640 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 753 states and 1085 transitions. [2020-10-20 08:00:50,652 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-10-20 08:00:50,663 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 753 states to 689 states and 1016 transitions. [2020-10-20 08:00:50,663 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 233 [2020-10-20 08:00:50,664 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 261 [2020-10-20 08:00:50,664 INFO L73 IsDeterministic]: Start isDeterministic. Operand 689 states and 1016 transitions. [2020-10-20 08:00:50,664 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 08:00:50,665 INFO L691 BuchiCegarLoop]: Abstraction has 689 states and 1016 transitions. [2020-10-20 08:00:50,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 689 states and 1016 transitions. [2020-10-20 08:00:50,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 689 to 672. [2020-10-20 08:00:50,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 672 states. [2020-10-20 08:00:50,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 672 states to 672 states and 991 transitions. [2020-10-20 08:00:50,689 INFO L714 BuchiCegarLoop]: Abstraction has 672 states and 991 transitions. [2020-10-20 08:00:50,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 08:00:50,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-20 08:00:50,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-10-20 08:00:50,690 INFO L87 Difference]: Start difference. First operand 672 states and 991 transitions. Second operand 14 states. [2020-10-20 08:00:50,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 08:00:50,922 INFO L93 Difference]: Finished difference Result 735 states and 1085 transitions. [2020-10-20 08:00:50,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-20 08:00:50,923 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 735 states and 1085 transitions. [2020-10-20 08:00:50,932 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-10-20 08:00:50,943 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 735 states to 725 states and 1070 transitions. [2020-10-20 08:00:50,943 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 268 [2020-10-20 08:00:50,943 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 268 [2020-10-20 08:00:50,944 INFO L73 IsDeterministic]: Start isDeterministic. Operand 725 states and 1070 transitions. [2020-10-20 08:00:50,944 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 08:00:50,944 INFO L691 BuchiCegarLoop]: Abstraction has 725 states and 1070 transitions. [2020-10-20 08:00:50,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 725 states and 1070 transitions. [2020-10-20 08:00:50,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 725 to 712. [2020-10-20 08:00:50,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 712 states. [2020-10-20 08:00:50,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 1045 transitions. [2020-10-20 08:00:50,967 INFO L714 BuchiCegarLoop]: Abstraction has 712 states and 1045 transitions. [2020-10-20 08:00:50,967 INFO L594 BuchiCegarLoop]: Abstraction has 712 states and 1045 transitions. [2020-10-20 08:00:50,967 INFO L427 BuchiCegarLoop]: ======== Iteration 7============ [2020-10-20 08:00:50,968 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 712 states and 1045 transitions. [2020-10-20 08:00:50,973 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-10-20 08:00:50,973 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 08:00:50,973 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 08:00:50,974 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [10, 9, 8, 7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 08:00:50,974 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-10-20 08:00:50,975 INFO L794 eck$LassoCheckResult]: Stem: 10978#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(12);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 10969#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 10; 10970#L27 call main_#t~ret9 := fibo(main_~x~0);< 10986#fiboENTRY ~n := #in~n; 11071#L8 assume !(~n < 1); 11069#L10 assume !(1 == ~n); 11066#L13 call #t~ret7 := fibo(~n - 1);< 11067#fiboENTRY ~n := #in~n; 11101#L8 assume !(~n < 1); 11100#L10 assume !(1 == ~n); 11078#L13 call #t~ret7 := fibo(~n - 1);< 11081#fiboENTRY ~n := #in~n; 11099#L8 assume !(~n < 1); 11083#L10 assume !(1 == ~n); 11073#L13 call #t~ret7 := fibo(~n - 1);< 11079#fiboENTRY ~n := #in~n; 11110#L8 assume !(~n < 1); 11109#L10 assume !(1 == ~n); 11095#L13 call #t~ret7 := fibo(~n - 1);< 11108#fiboENTRY ~n := #in~n; 11141#L8 assume !(~n < 1); 11130#L10 assume !(1 == ~n); 11096#L13 call #t~ret7 := fibo(~n - 1);< 11129#fiboENTRY ~n := #in~n; 11174#L8 assume !(~n < 1); 11161#L10 assume 1 == ~n;#res := 1; 11158#fiboFINAL assume true; 11156#fiboEXIT >#35#return; 11136#L13-1 call #t~ret8 := fibo(~n - 2);< 11138#fiboENTRY ~n := #in~n; 11152#L8 assume ~n < 1;#res := 0; 11149#fiboFINAL assume true; 11135#fiboEXIT >#37#return; 11134#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 11128#fiboFINAL assume true; 11107#fiboEXIT >#35#return; 11091#L13-1 call #t~ret8 := fibo(~n - 2);< 11098#fiboENTRY ~n := #in~n; 11159#L8 assume !(~n < 1); 11120#L10 assume !(1 == ~n); 11122#L13 call #t~ret7 := fibo(~n - 1);< 11148#fiboENTRY ~n := #in~n; 11320#L8 assume !(~n < 1); 11318#L10 assume !(1 == ~n); 11304#L13 call #t~ret7 := fibo(~n - 1);< 11314#fiboENTRY ~n := #in~n; 11397#L8 assume !(~n < 1); 11396#L10 assume !(1 == ~n); 11305#L13 [2020-10-20 08:00:50,975 INFO L796 eck$LassoCheckResult]: Loop: 11305#L13 call #t~ret7 := fibo(~n - 1);< 11314#fiboENTRY ~n := #in~n; 11397#L8 assume !(~n < 1); 11396#L10 assume !(1 == ~n); 11305#L13 [2020-10-20 08:00:50,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:50,975 INFO L82 PathProgramCache]: Analyzing trace with hash -1891219752, now seen corresponding path program 2 times [2020-10-20 08:00:50,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:00:50,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721293971] [2020-10-20 08:00:50,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:00:50,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:51,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-20 08:00:51,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:51,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 08:00:51,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:51,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-20 08:00:51,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:51,103 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 73 proven. 66 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-20 08:00:51,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721293971] [2020-10-20 08:00:51,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939905791] [2020-10-20 08:00:51,104 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 08:00:51,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-20 08:00:51,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 08:00:51,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-20 08:00:51,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:51,219 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 73 proven. 66 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-20 08:00:51,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 08:00:51,219 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-20 08:00:51,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900996503] [2020-10-20 08:00:51,221 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-20 08:00:51,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:51,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1955414, now seen corresponding path program 4 times [2020-10-20 08:00:51,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:00:51,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072885039] [2020-10-20 08:00:51,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:00:51,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:00:51,224 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:00:51,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:00:51,225 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:00:51,226 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 08:00:51,278 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 08:00:51,278 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 08:00:51,278 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 08:00:51,278 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 08:00:51,278 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-20 08:00:51,278 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:51,279 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 08:00:51,279 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 08:00:51,279 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-2.c_Iteration7_Loop [2020-10-20 08:00:51,279 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 08:00:51,279 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 08:00:51,280 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:51,292 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:51,295 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:51,297 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:51,343 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 08:00:51,343 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:00:51,353 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:00:51,353 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 53 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 54 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:00:51,401 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-20 08:00:51,401 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 08:00:52,810 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-20 08:00:52,812 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 08:00:52,812 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 08:00:52,812 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 08:00:52,812 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 08:00:52,812 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-20 08:00:52,812 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:52,812 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 08:00:52,812 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 08:00:52,813 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-2.c_Iteration7_Loop [2020-10-20 08:00:52,813 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 08:00:52,813 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 08:00:52,813 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:52,815 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:52,816 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:52,818 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:52,869 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 08:00:52,870 INFO L489 LassoAnalysis]: Using template 'affine'. 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) Waiting until toolchain timeout for monitored process 55 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:52,873 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 08:00:52,875 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:00:52,875 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:00:52,875 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:00:52,875 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:00:52,875 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:00:52,876 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:00:52,876 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:00:52,877 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 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 08:00:52,902 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 08:00:52,903 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:00:52,903 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:00:52,903 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:00:52,903 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:00:52,903 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:00:52,904 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:00:52,904 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:00:52,905 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:52,930 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 08:00:52,931 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:00:52,931 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:00:52,931 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:00:52,932 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:00:52,932 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:00:52,932 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:00:52,932 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:00:52,933 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:52,956 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 08:00:52,957 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:00:52,957 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:00:52,958 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:00:52,958 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:00:52,958 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:00:52,959 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:00:52,959 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:00:52,961 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-20 08:00:52,963 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2020-10-20 08:00:52,963 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 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 08:00:52,977 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-20 08:00:52,978 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-20 08:00:52,978 INFO L510 LassoAnalysis]: Proved termination. [2020-10-20 08:00:52,978 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2020-10-20 08:00:52,998 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-20 08:00:53,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:53,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:53,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-20 08:00:53,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:53,094 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:00:53,097 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:00:53,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:53,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-20 08:00:53,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:53,142 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 08:00:53,142 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 4 loop predicates [2020-10-20 08:00:53,142 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 712 states and 1045 transitions. cyclomatic complexity: 346 Second operand 6 states. [2020-10-20 08:00:53,218 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 712 states and 1045 transitions. cyclomatic complexity: 346. Second operand 6 states. Result 731 states and 1065 transitions. Complement of second has 18 states. [2020-10-20 08:00:53,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2020-10-20 08:00:53,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-20 08:00:53,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 13 transitions. [2020-10-20 08:00:53,220 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 13 transitions. Stem has 48 letters. Loop has 4 letters. [2020-10-20 08:00:53,221 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:00:53,221 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-20 08:00:53,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:53,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:53,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-20 08:00:53,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:53,321 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:00:53,326 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:00:53,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:53,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-20 08:00:53,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:53,392 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 08:00:53,392 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 4 loop predicates [2020-10-20 08:00:53,393 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 712 states and 1045 transitions. cyclomatic complexity: 346 Second operand 6 states. [2020-10-20 08:00:53,523 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 712 states and 1045 transitions. cyclomatic complexity: 346. Second operand 6 states. Result 916 states and 1284 transitions. Complement of second has 22 states. [2020-10-20 08:00:53,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2020-10-20 08:00:53,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-20 08:00:53,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 16 transitions. [2020-10-20 08:00:53,525 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 48 letters. Loop has 4 letters. [2020-10-20 08:00:53,526 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:00:53,526 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-20 08:00:53,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:53,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:53,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-20 08:00:53,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:53,627 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:00:53,630 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:00:53,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:53,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-20 08:00:53,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:53,672 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 08:00:53,672 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 4 loop predicates [2020-10-20 08:00:53,672 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 712 states and 1045 transitions. cyclomatic complexity: 346 Second operand 6 states. [2020-10-20 08:00:53,762 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 712 states and 1045 transitions. cyclomatic complexity: 346. Second operand 6 states. Result 959 states and 1365 transitions. Complement of second has 27 states. [2020-10-20 08:00:53,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2020-10-20 08:00:53,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-20 08:00:53,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 22 transitions. [2020-10-20 08:00:53,764 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 48 letters. Loop has 4 letters. [2020-10-20 08:00:53,765 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:00:53,765 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 52 letters. Loop has 4 letters. [2020-10-20 08:00:53,765 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:00:53,766 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 48 letters. Loop has 8 letters. [2020-10-20 08:00:53,766 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:00:53,766 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 959 states and 1365 transitions. [2020-10-20 08:00:53,777 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-10-20 08:00:53,786 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 959 states to 712 states and 1045 transitions. [2020-10-20 08:00:53,787 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 216 [2020-10-20 08:00:53,788 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 252 [2020-10-20 08:00:53,788 INFO L73 IsDeterministic]: Start isDeterministic. Operand 712 states and 1045 transitions. [2020-10-20 08:00:53,788 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 08:00:53,788 INFO L691 BuchiCegarLoop]: Abstraction has 712 states and 1045 transitions. [2020-10-20 08:00:53,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 712 states and 1045 transitions. [2020-10-20 08:00:53,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 712 to 712. [2020-10-20 08:00:53,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 712 states. [2020-10-20 08:00:53,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 1045 transitions. [2020-10-20 08:00:53,812 INFO L714 BuchiCegarLoop]: Abstraction has 712 states and 1045 transitions. [2020-10-20 08:00:53,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 08:00:53,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-20 08:00:53,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-10-20 08:00:53,813 INFO L87 Difference]: Start difference. First operand 712 states and 1045 transitions. Second operand 15 states. [2020-10-20 08:00:54,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 08:00:54,120 INFO L93 Difference]: Finished difference Result 777 states and 1127 transitions. [2020-10-20 08:00:54,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-20 08:00:54,121 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 777 states and 1127 transitions. [2020-10-20 08:00:54,129 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-10-20 08:00:54,138 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 777 states to 777 states and 1127 transitions. [2020-10-20 08:00:54,139 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 291 [2020-10-20 08:00:54,140 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 291 [2020-10-20 08:00:54,140 INFO L73 IsDeterministic]: Start isDeterministic. Operand 777 states and 1127 transitions. [2020-10-20 08:00:54,140 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 08:00:54,140 INFO L691 BuchiCegarLoop]: Abstraction has 777 states and 1127 transitions. [2020-10-20 08:00:54,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 777 states and 1127 transitions. [2020-10-20 08:00:54,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 777 to 736. [2020-10-20 08:00:54,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 736 states. [2020-10-20 08:00:54,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 1081 transitions. [2020-10-20 08:00:54,384 INFO L714 BuchiCegarLoop]: Abstraction has 736 states and 1081 transitions. [2020-10-20 08:00:54,385 INFO L594 BuchiCegarLoop]: Abstraction has 736 states and 1081 transitions. [2020-10-20 08:00:54,385 INFO L427 BuchiCegarLoop]: ======== Iteration 8============ [2020-10-20 08:00:54,386 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 736 states and 1081 transitions. [2020-10-20 08:00:54,390 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-10-20 08:00:54,391 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 08:00:54,391 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 08:00:54,392 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [13, 12, 10, 9, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2020-10-20 08:00:54,392 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-10-20 08:00:54,392 INFO L794 eck$LassoCheckResult]: Stem: 16560#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(12);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 16553#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 10; 16554#L27 call main_#t~ret9 := fibo(main_~x~0);< 16583#fiboENTRY ~n := #in~n; 16663#L8 assume !(~n < 1); 16662#L10 assume !(1 == ~n); 16658#L13 call #t~ret7 := fibo(~n - 1);< 16661#fiboENTRY ~n := #in~n; 16660#L8 assume !(~n < 1); 16659#L10 assume !(1 == ~n); 16654#L13 call #t~ret7 := fibo(~n - 1);< 16657#fiboENTRY ~n := #in~n; 16656#L8 assume !(~n < 1); 16655#L10 assume !(1 == ~n); 16647#L13 call #t~ret7 := fibo(~n - 1);< 16653#fiboENTRY ~n := #in~n; 16651#L8 assume !(~n < 1); 16649#L10 assume !(1 == ~n); 16635#L13 call #t~ret7 := fibo(~n - 1);< 16640#fiboENTRY ~n := #in~n; 16645#L8 assume !(~n < 1); 16643#L10 assume !(1 == ~n); 16634#L13 call #t~ret7 := fibo(~n - 1);< 16640#fiboENTRY ~n := #in~n; 16646#L8 assume !(~n < 1); 16644#L10 assume 1 == ~n;#res := 1; 16641#fiboFINAL assume true; 16633#fiboEXIT >#35#return; 16630#L13-1 call #t~ret8 := fibo(~n - 2);< 16629#fiboENTRY ~n := #in~n; 16631#L8 assume !(~n < 1); 16805#L10 assume !(1 == ~n); 16626#L13 call #t~ret7 := fibo(~n - 1);< 16637#fiboENTRY ~n := #in~n; 16652#L8 assume !(~n < 1); 17176#L10 assume !(1 == ~n); 16601#L13 call #t~ret7 := fibo(~n - 1);< 17214#fiboENTRY ~n := #in~n; 17223#L8 assume !(~n < 1); 17222#L10 assume 1 == ~n;#res := 1; 17219#fiboFINAL assume true; 17213#fiboEXIT >#35#return; 16670#L13-1 call #t~ret8 := fibo(~n - 2);< 16949#fiboENTRY ~n := #in~n; 17179#L8 assume ~n < 1;#res := 0; 17177#fiboFINAL assume true; 16669#fiboEXIT >#37#return; 16674#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 16827#fiboFINAL assume true; 16806#fiboEXIT >#35#return; 16752#L13-1 call #t~ret8 := fibo(~n - 2);< 16760#fiboENTRY ~n := #in~n; 16817#L8 assume !(~n < 1); 16812#L10 assume !(1 == ~n); 16814#L13 call #t~ret7 := fibo(~n - 1);< 16839#fiboENTRY ~n := #in~n; 16905#L8 assume !(~n < 1); 17075#L10 assume !(1 == ~n); 16979#L13 call #t~ret7 := fibo(~n - 1);< 16983#fiboENTRY ~n := #in~n; 16990#L8 assume !(~n < 1); 17002#L10 assume !(1 == ~n); 16981#L13 [2020-10-20 08:00:54,392 INFO L796 eck$LassoCheckResult]: Loop: 16981#L13 call #t~ret7 := fibo(~n - 1);< 16983#fiboENTRY ~n := #in~n; 16990#L8 assume !(~n < 1); 17002#L10 assume !(1 == ~n); 16981#L13 [2020-10-20 08:00:54,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:54,393 INFO L82 PathProgramCache]: Analyzing trace with hash 167551224, now seen corresponding path program 3 times [2020-10-20 08:00:54,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:00:54,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10570801] [2020-10-20 08:00:54,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:00:54,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:54,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-20 08:00:54,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:54,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-10-20 08:00:54,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:54,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 08:00:54,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:54,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-20 08:00:54,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:54,524 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 114 proven. 121 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-10-20 08:00:54,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10570801] [2020-10-20 08:00:54,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358595744] [2020-10-20 08:00:54,525 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 08:00:54,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-20 08:00:54,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 08:00:54,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-20 08:00:54,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:54,728 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 141 proven. 19 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2020-10-20 08:00:54,728 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 08:00:54,729 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2020-10-20 08:00:54,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119122498] [2020-10-20 08:00:54,729 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-20 08:00:54,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:54,730 INFO L82 PathProgramCache]: Analyzing trace with hash 1955414, now seen corresponding path program 5 times [2020-10-20 08:00:54,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:00:54,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198927954] [2020-10-20 08:00:54,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:00:54,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:00:54,733 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:00:54,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:00:54,758 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:00:54,759 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 08:00:54,806 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 08:00:54,807 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 08:00:54,807 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 08:00:54,807 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 08:00:54,807 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-20 08:00:54,807 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:54,807 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 08:00:54,807 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 08:00:54,807 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-2.c_Iteration8_Loop [2020-10-20 08:00:54,807 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 08:00:54,807 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 08:00:54,808 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:54,810 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:54,812 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:54,819 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:54,872 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 08:00:54,872 INFO L404 LassoAnalysis]: Checking for nontermination... 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 08:00:54,878 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:00:54,879 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:00:54,881 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:00:54,881 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret7=0} Honda state: {fibo_#t~ret7=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 08:00:54,904 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:00:54,905 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:00:54,907 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:00:54,907 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:00:54,930 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:00:54,930 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 63 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 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 08:00:54,956 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-20 08:00:54,957 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:00:56,347 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-20 08:00:56,349 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 08:00:56,349 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 08:00:56,349 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 08:00:56,349 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 08:00:56,349 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-20 08:00:56,350 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:56,350 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 08:00:56,350 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 08:00:56,350 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-2.c_Iteration8_Loop [2020-10-20 08:00:56,350 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 08:00:56,350 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 08:00:56,351 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 08:00:56,353 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:56,354 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:56,363 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 08:00:56,420 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 08:00:56,420 INFO L489 LassoAnalysis]: Using template 'affine'. 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 08:00:56,423 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 08:00:56,424 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:00:56,425 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:00:56,425 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:00:56,425 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:00:56,425 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:00:56,425 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:00:56,426 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:00:56,427 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 08:00:56,449 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 08:00:56,451 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:00:56,451 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:00:56,451 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:00:56,451 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:00:56,451 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:00:56,451 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:00:56,452 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:00:56,453 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 08:00:56,474 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 08:00:56,476 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:00:56,476 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:00:56,476 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:00:56,476 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:00:56,476 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:00:56,477 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:00:56,477 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:00:56,480 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-20 08:00:56,482 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2020-10-20 08:00:56,482 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 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 08:00:56,484 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-20 08:00:56,484 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-20 08:00:56,485 INFO L510 LassoAnalysis]: Proved termination. [2020-10-20 08:00:56,485 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2020-10-20 08:00:56,505 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-20 08:00:56,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:56,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:56,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-20 08:00:56,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:56,616 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:00:56,620 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:00:56,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:56,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-20 08:00:56,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:56,687 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 08:00:56,688 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 4 loop predicates [2020-10-20 08:00:56,688 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 736 states and 1081 transitions. cyclomatic complexity: 358 Second operand 6 states. [2020-10-20 08:00:56,756 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 736 states and 1081 transitions. cyclomatic complexity: 358. Second operand 6 states. Result 755 states and 1101 transitions. Complement of second has 18 states. [2020-10-20 08:00:56,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2020-10-20 08:00:56,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-20 08:00:56,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 13 transitions. [2020-10-20 08:00:56,758 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 13 transitions. Stem has 62 letters. Loop has 4 letters. [2020-10-20 08:00:56,760 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:00:56,760 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-20 08:00:56,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:56,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:56,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-20 08:00:56,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:56,857 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:00:56,858 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:00:56,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:56,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-20 08:00:56,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:56,901 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 08:00:56,902 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 4 loop predicates [2020-10-20 08:00:56,902 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 736 states and 1081 transitions. cyclomatic complexity: 358 Second operand 6 states. [2020-10-20 08:00:57,010 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 736 states and 1081 transitions. cyclomatic complexity: 358. Second operand 6 states. Result 940 states and 1320 transitions. Complement of second has 22 states. [2020-10-20 08:00:57,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2020-10-20 08:00:57,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-20 08:00:57,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 16 transitions. [2020-10-20 08:00:57,012 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 62 letters. Loop has 4 letters. [2020-10-20 08:00:57,012 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:00:57,012 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-20 08:00:57,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:57,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:57,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-20 08:00:57,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:57,130 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:00:57,132 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:00:57,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:57,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-20 08:00:57,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:57,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 08:00:57,167 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 4 loop predicates [2020-10-20 08:00:57,167 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 736 states and 1081 transitions. cyclomatic complexity: 358 Second operand 6 states. [2020-10-20 08:00:57,237 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 736 states and 1081 transitions. cyclomatic complexity: 358. Second operand 6 states. Result 983 states and 1401 transitions. Complement of second has 27 states. [2020-10-20 08:00:57,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2020-10-20 08:00:57,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-20 08:00:57,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 22 transitions. [2020-10-20 08:00:57,238 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 62 letters. Loop has 4 letters. [2020-10-20 08:00:57,240 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:00:57,240 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 66 letters. Loop has 4 letters. [2020-10-20 08:00:57,242 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:00:57,242 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 62 letters. Loop has 8 letters. [2020-10-20 08:00:57,243 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:00:57,243 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 983 states and 1401 transitions. [2020-10-20 08:00:57,253 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-10-20 08:00:57,262 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 983 states to 736 states and 1081 transitions. [2020-10-20 08:00:57,262 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 231 [2020-10-20 08:00:57,263 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 267 [2020-10-20 08:00:57,263 INFO L73 IsDeterministic]: Start isDeterministic. Operand 736 states and 1081 transitions. [2020-10-20 08:00:57,264 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 08:00:57,264 INFO L691 BuchiCegarLoop]: Abstraction has 736 states and 1081 transitions. [2020-10-20 08:00:57,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states and 1081 transitions. [2020-10-20 08:00:57,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 736. [2020-10-20 08:00:57,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 736 states. [2020-10-20 08:00:57,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 1081 transitions. [2020-10-20 08:00:57,287 INFO L714 BuchiCegarLoop]: Abstraction has 736 states and 1081 transitions. [2020-10-20 08:00:57,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 08:00:57,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-20 08:00:57,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2020-10-20 08:00:57,288 INFO L87 Difference]: Start difference. First operand 736 states and 1081 transitions. Second operand 23 states. [2020-10-20 08:00:57,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 08:00:57,870 INFO L93 Difference]: Finished difference Result 456 states and 590 transitions. [2020-10-20 08:00:57,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-20 08:00:57,871 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 456 states and 590 transitions. [2020-10-20 08:00:57,883 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2020-10-20 08:00:57,888 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 456 states to 384 states and 507 transitions. [2020-10-20 08:00:57,889 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 165 [2020-10-20 08:00:57,889 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 184 [2020-10-20 08:00:57,889 INFO L73 IsDeterministic]: Start isDeterministic. Operand 384 states and 507 transitions. [2020-10-20 08:00:57,890 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 08:00:57,890 INFO L691 BuchiCegarLoop]: Abstraction has 384 states and 507 transitions. [2020-10-20 08:00:57,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states and 507 transitions. [2020-10-20 08:00:57,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 318. [2020-10-20 08:00:57,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 318 states. [2020-10-20 08:00:57,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 425 transitions. [2020-10-20 08:00:57,901 INFO L714 BuchiCegarLoop]: Abstraction has 318 states and 425 transitions. [2020-10-20 08:00:57,902 INFO L594 BuchiCegarLoop]: Abstraction has 318 states and 425 transitions. [2020-10-20 08:00:57,902 INFO L427 BuchiCegarLoop]: ======== Iteration 9============ [2020-10-20 08:00:57,902 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 318 states and 425 transitions. [2020-10-20 08:00:57,904 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2020-10-20 08:00:57,905 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 08:00:57,905 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 08:00:57,906 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [14, 13, 11, 10, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1] [2020-10-20 08:00:57,907 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-10-20 08:00:57,908 INFO L794 eck$LassoCheckResult]: Stem: 22131#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(12);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 22122#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 10; 22123#L27 call main_#t~ret9 := fibo(main_~x~0);< 22144#fiboENTRY ~n := #in~n; 22237#L8 assume !(~n < 1); 22235#L10 assume !(1 == ~n); 22215#L13 call #t~ret7 := fibo(~n - 1);< 22230#fiboENTRY ~n := #in~n; 22224#L8 assume !(~n < 1); 22221#L10 assume !(1 == ~n); 22217#L13 call #t~ret7 := fibo(~n - 1);< 22218#fiboENTRY ~n := #in~n; 22272#L8 assume !(~n < 1); 22271#L10 assume !(1 == ~n); 22232#L13 call #t~ret7 := fibo(~n - 1);< 22234#fiboENTRY ~n := #in~n; 22241#L8 assume !(~n < 1); 22240#L10 assume !(1 == ~n); 22227#L13 call #t~ret7 := fibo(~n - 1);< 22239#fiboENTRY ~n := #in~n; 22257#L8 assume !(~n < 1); 22254#L10 assume !(1 == ~n); 22111#L13 call #t~ret7 := fibo(~n - 1);< 22250#fiboENTRY ~n := #in~n; 22355#L8 assume !(~n < 1); 22354#L10 assume !(1 == ~n); 22112#L13 call #t~ret7 := fibo(~n - 1);< 22250#fiboENTRY ~n := #in~n; 22355#L8 assume !(~n < 1); 22354#L10 assume !(1 == ~n); 22112#L13 call #t~ret7 := fibo(~n - 1);< 22250#fiboENTRY ~n := #in~n; 22355#L8 assume !(~n < 1); 22354#L10 assume !(1 == ~n); 22112#L13 call #t~ret7 := fibo(~n - 1);< 22277#fiboENTRY ~n := #in~n; 22410#L8 assume !(~n < 1); 22409#L10 assume 1 == ~n;#res := 1; 22408#fiboFINAL assume true; 22407#fiboEXIT >#35#return; 22110#L13-1 call #t~ret8 := fibo(~n - 2);< 22113#fiboENTRY ~n := #in~n; 22418#L8 assume ~n < 1;#res := 0; 22416#fiboFINAL assume true; 22414#fiboEXIT >#37#return; 22412#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 22411#fiboFINAL assume true; 22297#fiboEXIT >#35#return; 22288#L13-1 call #t~ret8 := fibo(~n - 2);< 22290#fiboENTRY ~n := #in~n; 22349#L8 assume !(~n < 1); 22312#L10 assume 1 == ~n;#res := 1; 22308#fiboFINAL assume true; 22287#fiboEXIT >#37#return; 22283#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 22281#fiboFINAL assume true; 22280#fiboEXIT >#35#return; 22245#L13-1 call #t~ret8 := fibo(~n - 2);< 22248#fiboENTRY ~n := #in~n; 22316#L8 assume !(~n < 1); 22313#L10 assume !(1 == ~n); 22136#L13 call #t~ret7 := fibo(~n - 1);< 22126#fiboENTRY ~n := #in~n; 22204#L8 assume !(~n < 1); 22205#L10 assume !(1 == ~n); 22172#L13 call #t~ret7 := fibo(~n - 1);< 22174#fiboENTRY ~n := #in~n; 22196#L8 assume !(~n < 1); 22192#L10 assume !(1 == ~n); 22170#L13 [2020-10-20 08:00:57,908 INFO L796 eck$LassoCheckResult]: Loop: 22170#L13 call #t~ret7 := fibo(~n - 1);< 22174#fiboENTRY ~n := #in~n; 22196#L8 assume !(~n < 1); 22192#L10 assume !(1 == ~n); 22170#L13 [2020-10-20 08:00:57,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:57,909 INFO L82 PathProgramCache]: Analyzing trace with hash 817988141, now seen corresponding path program 4 times [2020-10-20 08:00:57,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:00:57,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69766416] [2020-10-20 08:00:57,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:00:57,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:58,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-20 08:00:58,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:58,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 08:00:58,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:58,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 08:00:58,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:58,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-20 08:00:58,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:58,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-20 08:00:58,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:00:58,159 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 120 proven. 179 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-20 08:00:58,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69766416] [2020-10-20 08:00:58,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650629409] [2020-10-20 08:00:58,160 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 08:00:58,212 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-20 08:00:58,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 08:00:58,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-20 08:00:58,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:00:58,262 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 120 proven. 179 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-20 08:00:58,262 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 08:00:58,263 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-20 08:00:58,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962646065] [2020-10-20 08:00:58,265 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-20 08:00:58,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:00:58,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1955414, now seen corresponding path program 6 times [2020-10-20 08:00:58,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:00:58,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239535565] [2020-10-20 08:00:58,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:00:58,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:00:58,270 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:00:58,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:00:58,271 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:00:58,273 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 08:00:58,312 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 08:00:58,313 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 08:00:58,313 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 08:00:58,313 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 08:00:58,313 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-20 08:00:58,313 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:58,313 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 08:00:58,313 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 08:00:58,313 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-2.c_Iteration9_Loop [2020-10-20 08:00:58,314 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 08:00:58,314 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 08:00:58,314 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:58,317 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:58,319 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:58,321 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:00:58,381 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 08:00:58,381 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:00:58,393 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:00:58,393 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 70 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:58,396 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:00:58,396 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret8=0} Honda state: {fibo_#t~ret8=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:00:58,434 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:00:58,434 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 71 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:58,437 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:00:58,438 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:00:58,476 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:00:58,476 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 72 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:00:58,479 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:00:58,479 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret7=0} Honda state: {fibo_#t~ret7=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] 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) [2020-10-20 08:00:58,517 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:00:58,517 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 73 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 74 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:00:58,561 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-20 08:00:58,561 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 74 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:05,553 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-20 08:01:05,554 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 08:01:05,555 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 08:01:05,555 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 08:01:05,555 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 08:01:05,555 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-20 08:01:05,555 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:05,555 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 08:01:05,555 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 08:01:05,555 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-2.c_Iteration9_Loop [2020-10-20 08:01:05,555 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 08:01:05,555 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 08:01:05,556 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:05,559 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:05,560 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:05,569 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:05,624 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 08:01:05,624 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:05,628 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 08:01:05,629 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:05,629 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:05,629 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:05,629 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:05,630 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:05,631 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:05,631 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:05,632 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:05,653 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 08:01:05,654 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:05,654 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:05,654 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:05,654 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:05,655 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:05,655 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:05,655 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:05,656 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:05,680 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 08:01:05,682 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:05,682 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:05,682 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:05,682 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:05,682 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:05,683 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:05,683 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:05,685 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-20 08:01:05,687 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2020-10-20 08:01:05,687 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 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 08:01:05,690 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-20 08:01:05,690 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-20 08:01:05,690 INFO L510 LassoAnalysis]: Proved termination. [2020-10-20 08:01:05,690 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2020-10-20 08:01:05,711 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-20 08:01:05,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:05,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:05,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-20 08:01:05,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:05,867 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:05,871 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:05,875 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:05,881 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:05,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:05,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-20 08:01:05,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:05,921 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 08:01:05,922 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 4 loop predicates [2020-10-20 08:01:05,922 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 318 states and 425 transitions. cyclomatic complexity: 111 Second operand 6 states. [2020-10-20 08:01:05,978 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 318 states and 425 transitions. cyclomatic complexity: 111. Second operand 6 states. Result 337 states and 445 transitions. Complement of second has 18 states. [2020-10-20 08:01:05,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2020-10-20 08:01:05,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-20 08:01:05,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 13 transitions. [2020-10-20 08:01:05,980 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 13 transitions. Stem has 69 letters. Loop has 4 letters. [2020-10-20 08:01:05,980 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:05,980 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-20 08:01:05,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:06,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:06,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-20 08:01:06,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:06,082 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:06,084 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:06,086 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:06,088 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:06,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:06,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-20 08:01:06,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:06,128 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 08:01:06,128 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 4 loop predicates [2020-10-20 08:01:06,128 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 318 states and 425 transitions. cyclomatic complexity: 111 Second operand 6 states. [2020-10-20 08:01:06,227 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 318 states and 425 transitions. cyclomatic complexity: 111. Second operand 6 states. Result 343 states and 451 transitions. Complement of second has 17 states. [2020-10-20 08:01:06,228 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 08:01:06,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-20 08:01:06,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 16 transitions. [2020-10-20 08:01:06,229 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 69 letters. Loop has 4 letters. [2020-10-20 08:01:06,229 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:06,229 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-20 08:01:06,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:06,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:06,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-20 08:01:06,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:06,358 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:06,360 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:06,361 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:06,363 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:06,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:06,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-20 08:01:06,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:06,401 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 08:01:06,402 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 4 loop predicates [2020-10-20 08:01:06,402 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 318 states and 425 transitions. cyclomatic complexity: 111 Second operand 6 states. [2020-10-20 08:01:06,471 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 318 states and 425 transitions. cyclomatic complexity: 111. Second operand 6 states. Result 424 states and 555 transitions. Complement of second has 27 states. [2020-10-20 08:01:06,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2020-10-20 08:01:06,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-20 08:01:06,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 22 transitions. [2020-10-20 08:01:06,475 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 69 letters. Loop has 4 letters. [2020-10-20 08:01:06,476 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:06,476 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 73 letters. Loop has 4 letters. [2020-10-20 08:01:06,476 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:06,476 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 69 letters. Loop has 8 letters. [2020-10-20 08:01:06,477 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:06,477 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 424 states and 555 transitions. [2020-10-20 08:01:06,481 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2020-10-20 08:01:06,485 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 424 states to 326 states and 435 transitions. [2020-10-20 08:01:06,485 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 123 [2020-10-20 08:01:06,486 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 135 [2020-10-20 08:01:06,486 INFO L73 IsDeterministic]: Start isDeterministic. Operand 326 states and 435 transitions. [2020-10-20 08:01:06,486 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 08:01:06,486 INFO L691 BuchiCegarLoop]: Abstraction has 326 states and 435 transitions. [2020-10-20 08:01:06,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states and 435 transitions. [2020-10-20 08:01:06,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 318. [2020-10-20 08:01:06,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 318 states. [2020-10-20 08:01:06,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 425 transitions. [2020-10-20 08:01:06,497 INFO L714 BuchiCegarLoop]: Abstraction has 318 states and 425 transitions. [2020-10-20 08:01:06,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 08:01:06,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-20 08:01:06,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2020-10-20 08:01:06,498 INFO L87 Difference]: Start difference. First operand 318 states and 425 transitions. Second operand 20 states. [2020-10-20 08:01:06,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 08:01:06,967 INFO L93 Difference]: Finished difference Result 462 states and 631 transitions. [2020-10-20 08:01:06,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-20 08:01:06,968 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 462 states and 631 transitions. [2020-10-20 08:01:06,973 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2020-10-20 08:01:06,979 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 462 states to 451 states and 614 transitions. [2020-10-20 08:01:06,980 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 204 [2020-10-20 08:01:06,980 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 204 [2020-10-20 08:01:06,980 INFO L73 IsDeterministic]: Start isDeterministic. Operand 451 states and 614 transitions. [2020-10-20 08:01:06,981 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 08:01:06,981 INFO L691 BuchiCegarLoop]: Abstraction has 451 states and 614 transitions. [2020-10-20 08:01:06,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states and 614 transitions. [2020-10-20 08:01:06,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 384. [2020-10-20 08:01:06,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 384 states. [2020-10-20 08:01:06,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 515 transitions. [2020-10-20 08:01:06,994 INFO L714 BuchiCegarLoop]: Abstraction has 384 states and 515 transitions. [2020-10-20 08:01:06,994 INFO L594 BuchiCegarLoop]: Abstraction has 384 states and 515 transitions. [2020-10-20 08:01:06,994 INFO L427 BuchiCegarLoop]: ======== Iteration 10============ [2020-10-20 08:01:06,994 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 384 states and 515 transitions. [2020-10-20 08:01:06,996 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2020-10-20 08:01:06,996 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 08:01:06,996 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 08:01:06,997 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [15, 14, 12, 11, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1] [2020-10-20 08:01:06,998 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-10-20 08:01:06,998 INFO L794 eck$LassoCheckResult]: Stem: 25398#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(12);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 25375#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 10; 25376#L27 call main_#t~ret9 := fibo(main_~x~0);< 25405#fiboENTRY ~n := #in~n; 25583#L8 assume !(~n < 1); 25507#L10 assume !(1 == ~n); 25494#L13 call #t~ret7 := fibo(~n - 1);< 25505#fiboENTRY ~n := #in~n; 25503#L8 assume !(~n < 1); 25501#L10 assume !(1 == ~n); 25497#L13 call #t~ret7 := fibo(~n - 1);< 25498#fiboENTRY ~n := #in~n; 25546#L8 assume !(~n < 1); 25532#L10 assume !(1 == ~n); 25522#L13 call #t~ret7 := fibo(~n - 1);< 25527#fiboENTRY ~n := #in~n; 25531#L8 assume !(~n < 1); 25526#L10 assume !(1 == ~n); 25518#L13 call #t~ret7 := fibo(~n - 1);< 25525#fiboENTRY ~n := #in~n; 25554#L8 assume !(~n < 1); 25552#L10 assume !(1 == ~n); 25534#L13 call #t~ret7 := fibo(~n - 1);< 25548#fiboENTRY ~n := #in~n; 25747#L8 assume !(~n < 1); 25746#L10 assume !(1 == ~n); 25392#L13 call #t~ret7 := fibo(~n - 1);< 25588#fiboENTRY ~n := #in~n; 25637#L8 assume !(~n < 1); 25636#L10 assume !(1 == ~n); 25391#L13 call #t~ret7 := fibo(~n - 1);< 25588#fiboENTRY ~n := #in~n; 25637#L8 assume !(~n < 1); 25636#L10 assume !(1 == ~n); 25391#L13 call #t~ret7 := fibo(~n - 1);< 25588#fiboENTRY ~n := #in~n; 25637#L8 assume !(~n < 1); 25636#L10 assume !(1 == ~n); 25391#L13 call #t~ret7 := fibo(~n - 1);< 25635#fiboENTRY ~n := #in~n; 25742#L8 assume !(~n < 1); 25424#L10 assume 1 == ~n;#res := 1; 25425#fiboFINAL assume true; 25719#fiboEXIT >#35#return; 25390#L13-1 call #t~ret8 := fibo(~n - 2);< 25393#fiboENTRY ~n := #in~n; 25756#L8 assume ~n < 1;#res := 0; 25755#fiboFINAL assume true; 25754#fiboEXIT >#37#return; 25380#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 25753#fiboFINAL assume true; 25752#fiboEXIT >#35#return; 25378#L13-1 call #t~ret8 := fibo(~n - 2);< 25645#fiboENTRY ~n := #in~n; 25748#L8 assume !(~n < 1); 25672#L10 assume 1 == ~n;#res := 1; 25661#fiboFINAL assume true; 25642#fiboEXIT >#37#return; 25641#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 25634#fiboFINAL assume true; 25610#fiboEXIT >#35#return; 25379#L13-1 call #t~ret8 := fibo(~n - 2);< 25543#fiboENTRY ~n := #in~n; 25662#L8 assume !(~n < 1); 25660#L10 assume !(1 == ~n); 25630#L13 call #t~ret7 := fibo(~n - 1);< 25657#fiboENTRY ~n := #in~n; 25666#L8 assume !(~n < 1); 25758#L10 assume !(1 == ~n); 25453#L13 call #t~ret7 := fibo(~n - 1);< 25450#fiboENTRY ~n := #in~n; 25668#L8 assume !(~n < 1); 25667#L10 assume !(1 == ~n); 25454#L13 [2020-10-20 08:01:06,998 INFO L796 eck$LassoCheckResult]: Loop: 25454#L13 call #t~ret7 := fibo(~n - 1);< 25450#fiboENTRY ~n := #in~n; 25668#L8 assume !(~n < 1); 25667#L10 assume !(1 == ~n); 25454#L13 [2020-10-20 08:01:06,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:06,998 INFO L82 PathProgramCache]: Analyzing trace with hash 1637456312, now seen corresponding path program 5 times [2020-10-20 08:01:06,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:01:06,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384727455] [2020-10-20 08:01:06,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:01:07,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:07,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-20 08:01:07,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:07,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 08:01:07,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:07,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 08:01:07,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:07,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-20 08:01:07,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:07,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-20 08:01:07,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:07,266 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 219 proven. 112 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-20 08:01:07,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384727455] [2020-10-20 08:01:07,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150013849] [2020-10-20 08:01:07,267 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 08:01:07,317 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-10-20 08:01:07,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 08:01:07,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-20 08:01:07,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:07,406 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 179 proven. 18 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2020-10-20 08:01:07,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 08:01:07,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 10] total 24 [2020-10-20 08:01:07,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249800950] [2020-10-20 08:01:07,408 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-20 08:01:07,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:07,408 INFO L82 PathProgramCache]: Analyzing trace with hash 1955414, now seen corresponding path program 7 times [2020-10-20 08:01:07,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:01:07,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112419901] [2020-10-20 08:01:07,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:01:07,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:01:07,412 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:01:07,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:01:07,413 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:01:07,415 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 08:01:07,467 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 08:01:07,467 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 08:01:07,467 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 08:01:07,468 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 08:01:07,468 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-20 08:01:07,468 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:07,468 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 08:01:07,469 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 08:01:07,469 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-2.c_Iteration10_Loop [2020-10-20 08:01:07,469 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 08:01:07,469 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 08:01:07,470 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:07,473 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:07,483 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 08:01:07,485 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:07,547 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 08:01:07,547 INFO L404 LassoAnalysis]: Checking for nontermination... 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) [2020-10-20 08:01:07,551 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:01:07,551 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 80 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:07,555 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:01:07,555 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret8=0} Honda state: {fibo_#t~ret8=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) [2020-10-20 08:01:07,603 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:01:07,603 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 81 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 82 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:01:07,649 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-20 08:01:07,649 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 82 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:14,584 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-20 08:01:14,586 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 08:01:14,586 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 08:01:14,586 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 08:01:14,587 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 08:01:14,587 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-20 08:01:14,587 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:14,587 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 08:01:14,587 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 08:01:14,587 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_10-2.c_Iteration10_Loop [2020-10-20 08:01:14,587 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 08:01:14,587 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 08:01:14,588 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:14,590 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:14,592 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:14,601 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:14,658 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 08:01:14,659 INFO L489 LassoAnalysis]: Using template 'affine'. 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 08:01:14,661 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 08:01:14,662 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:14,662 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:14,662 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:14,663 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:14,663 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:14,663 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:14,663 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:14,664 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 08:01:14,687 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 08:01:14,688 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:14,688 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:14,688 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:14,688 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:14,689 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:14,689 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:14,689 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:14,690 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 08:01:14,712 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 08:01:14,713 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:14,713 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:14,714 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:14,714 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:14,714 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:14,714 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:14,714 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:14,716 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-20 08:01:14,719 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-20 08:01:14,719 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:14,722 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-20 08:01:14,722 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-20 08:01:14,722 INFO L510 LassoAnalysis]: Proved termination. [2020-10-20 08:01:14,722 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2020-10-20 08:01:14,742 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-20 08:01:14,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:14,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:14,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 599 conjuncts, 32 conjunts are in the unsatisfiable core [2020-10-20 08:01:14,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:14,855 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:14,856 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:14,858 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:14,860 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:14,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:14,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-20 08:01:14,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:14,898 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 08:01:14,898 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 4 loop predicates [2020-10-20 08:01:14,898 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 384 states and 515 transitions. cyclomatic complexity: 135 Second operand 6 states. [2020-10-20 08:01:14,959 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 384 states and 515 transitions. cyclomatic complexity: 135. Second operand 6 states. Result 406 states and 538 transitions. Complement of second has 18 states. [2020-10-20 08:01:14,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2020-10-20 08:01:14,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-20 08:01:14,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 13 transitions. [2020-10-20 08:01:14,967 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 13 transitions. Stem has 73 letters. Loop has 4 letters. [2020-10-20 08:01:14,967 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:14,967 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-20 08:01:14,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:15,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:15,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 599 conjuncts, 32 conjunts are in the unsatisfiable core [2020-10-20 08:01:15,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:15,101 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:15,103 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:15,104 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:15,106 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:15,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:15,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-20 08:01:15,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:15,152 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 08:01:15,152 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 4 loop predicates [2020-10-20 08:01:15,152 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 384 states and 515 transitions. cyclomatic complexity: 135 Second operand 6 states. [2020-10-20 08:01:15,233 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 384 states and 515 transitions. cyclomatic complexity: 135. Second operand 6 states. Result 412 states and 544 transitions. Complement of second has 17 states. [2020-10-20 08:01:15,234 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 08:01:15,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-20 08:01:15,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 16 transitions. [2020-10-20 08:01:15,237 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 73 letters. Loop has 4 letters. [2020-10-20 08:01:15,237 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:15,237 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-20 08:01:15,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:15,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:15,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 599 conjuncts, 32 conjunts are in the unsatisfiable core [2020-10-20 08:01:15,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:15,389 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:15,393 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:15,395 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:15,397 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:15,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:15,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-20 08:01:15,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:15,455 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 08:01:15,456 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 4 loop predicates [2020-10-20 08:01:15,456 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 384 states and 515 transitions. cyclomatic complexity: 135 Second operand 6 states. [2020-10-20 08:01:15,541 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 384 states and 515 transitions. cyclomatic complexity: 135. Second operand 6 states. Result 507 states and 666 transitions. Complement of second has 27 states. [2020-10-20 08:01:15,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2020-10-20 08:01:15,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-20 08:01:15,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 22 transitions. [2020-10-20 08:01:15,544 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 73 letters. Loop has 4 letters. [2020-10-20 08:01:15,544 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:15,546 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 77 letters. Loop has 4 letters. [2020-10-20 08:01:15,546 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:15,547 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 73 letters. Loop has 8 letters. [2020-10-20 08:01:15,551 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:15,551 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 507 states and 666 transitions. [2020-10-20 08:01:15,559 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2020-10-20 08:01:15,565 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 507 states to 388 states and 520 transitions. [2020-10-20 08:01:15,566 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 144 [2020-10-20 08:01:15,566 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 156 [2020-10-20 08:01:15,567 INFO L73 IsDeterministic]: Start isDeterministic. Operand 388 states and 520 transitions. [2020-10-20 08:01:15,567 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 08:01:15,567 INFO L691 BuchiCegarLoop]: Abstraction has 388 states and 520 transitions. [2020-10-20 08:01:15,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states and 520 transitions. [2020-10-20 08:01:15,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 384. [2020-10-20 08:01:15,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 384 states. [2020-10-20 08:01:15,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 515 transitions. [2020-10-20 08:01:15,582 INFO L714 BuchiCegarLoop]: Abstraction has 384 states and 515 transitions. [2020-10-20 08:01:15,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 08:01:15,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-20 08:01:15,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=417, Unknown=0, NotChecked=0, Total=552 [2020-10-20 08:01:15,584 INFO L87 Difference]: Start difference. First operand 384 states and 515 transitions. Second operand 24 states. [2020-10-20 08:01:16,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 08:01:16,188 INFO L93 Difference]: Finished difference Result 542 states and 774 transitions. [2020-10-20 08:01:16,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-20 08:01:16,189 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 542 states and 774 transitions. [2020-10-20 08:01:16,194 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-10-20 08:01:16,194 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 542 states to 0 states and 0 transitions. [2020-10-20 08:01:16,195 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2020-10-20 08:01:16,195 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2020-10-20 08:01:16,195 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2020-10-20 08:01:16,195 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-20 08:01:16,195 INFO L691 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-20 08:01:16,195 INFO L714 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-20 08:01:16,195 INFO L594 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-20 08:01:16,196 INFO L427 BuchiCegarLoop]: ======== Iteration 11============ [2020-10-20 08:01:16,196 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2020-10-20 08:01:16,196 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-10-20 08:01:16,196 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2020-10-20 08:01:16,203 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 20.10 08:01:16 BoogieIcfgContainer [2020-10-20 08:01:16,203 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2020-10-20 08:01:16,203 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 08:01:16,204 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 08:01:16,204 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 08:01:16,205 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 08:00:32" (3/4) ... [2020-10-20 08:01:16,208 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-10-20 08:01:16,209 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 08:01:16,211 INFO L168 Benchmark]: Toolchain (without parser) took 43950.50 ms. Allocated memory was 35.7 MB in the beginning and 162.0 MB in the end (delta: 126.4 MB). Free memory was 10.0 MB in the beginning and 46.5 MB in the end (delta: -36.6 MB). Peak memory consumption was 89.8 MB. Max. memory is 14.3 GB. [2020-10-20 08:01:16,212 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 35.1 MB. Free memory was 14.0 MB in the beginning and 13.9 MB in the end (delta: 49.2 kB). Peak memory consumption was 49.2 kB. Max. memory is 14.3 GB. [2020-10-20 08:01:16,212 INFO L168 Benchmark]: CACSL2BoogieTranslator took 333.07 ms. Allocated memory was 35.7 MB in the beginning and 45.1 MB in the end (delta: 9.4 MB). Free memory was 9.1 MB in the beginning and 29.0 MB in the end (delta: -19.9 MB). Peak memory consumption was 7.7 MB. Max. memory is 14.3 GB. [2020-10-20 08:01:16,213 INFO L168 Benchmark]: Boogie Procedure Inliner took 37.02 ms. Allocated memory is still 45.1 MB. Free memory was 29.0 MB in the beginning and 27.4 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 14.3 GB. [2020-10-20 08:01:16,213 INFO L168 Benchmark]: Boogie Preprocessor took 20.33 ms. Allocated memory is still 45.1 MB. Free memory was 27.4 MB in the beginning and 26.3 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 14.3 GB. [2020-10-20 08:01:16,214 INFO L168 Benchmark]: RCFGBuilder took 282.28 ms. Allocated memory was 45.1 MB in the beginning and 47.2 MB in the end (delta: 2.1 MB). Free memory was 26.3 MB in the beginning and 28.2 MB in the end (delta: -1.9 MB). Peak memory consumption was 14.6 MB. Max. memory is 14.3 GB. [2020-10-20 08:01:16,215 INFO L168 Benchmark]: BuchiAutomizer took 43262.23 ms. Allocated memory was 47.2 MB in the beginning and 162.0 MB in the end (delta: 114.8 MB). Free memory was 28.0 MB in the beginning and 48.8 MB in the end (delta: -20.9 MB). Peak memory consumption was 93.9 MB. Max. memory is 14.3 GB. [2020-10-20 08:01:16,215 INFO L168 Benchmark]: Witness Printer took 5.15 ms. Allocated memory is still 162.0 MB. Free memory was 48.8 MB in the beginning and 46.5 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 14.3 GB. [2020-10-20 08:01:16,219 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 35.1 MB. Free memory was 14.0 MB in the beginning and 13.9 MB in the end (delta: 49.2 kB). Peak memory consumption was 49.2 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 333.07 ms. Allocated memory was 35.7 MB in the beginning and 45.1 MB in the end (delta: 9.4 MB). Free memory was 9.1 MB in the beginning and 29.0 MB in the end (delta: -19.9 MB). Peak memory consumption was 7.7 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 37.02 ms. Allocated memory is still 45.1 MB. Free memory was 29.0 MB in the beginning and 27.4 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 20.33 ms. Allocated memory is still 45.1 MB. Free memory was 27.4 MB in the beginning and 26.3 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 14.3 GB. * RCFGBuilder took 282.28 ms. Allocated memory was 45.1 MB in the beginning and 47.2 MB in the end (delta: 2.1 MB). Free memory was 26.3 MB in the beginning and 28.2 MB in the end (delta: -1.9 MB). Peak memory consumption was 14.6 MB. Max. memory is 14.3 GB. * BuchiAutomizer took 43262.23 ms. Allocated memory was 47.2 MB in the beginning and 162.0 MB in the end (delta: 114.8 MB). Free memory was 28.0 MB in the beginning and 48.8 MB in the end (delta: -20.9 MB). Peak memory consumption was 93.9 MB. Max. memory is 14.3 GB. * Witness Printer took 5.15 ms. Allocated memory is still 162.0 MB. Free memory was 48.8 MB in the beginning and 46.5 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 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 18 terminating modules (9 trivial, 3 deterministic, 6 nondeterministic). One deterministic module has affine ranking function \old(n) and consists of 4 locations. One deterministic module has affine ranking function n and consists of 10 locations. One deterministic module has affine ranking function n and consists of 7 locations. One nondeterministic module has affine ranking function n and consists of 9 locations. One nondeterministic module has affine ranking function \old(n) and consists of 5 locations. One nondeterministic module has affine ranking function n and consists of 6 locations. One nondeterministic module has affine ranking function n and consists of 6 locations. One nondeterministic module has affine ranking function n and consists of 6 locations. One nondeterministic module has affine ranking function n and consists of 6 locations. 9 modules have a trivial ranking function, the largest among these consists of 24 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 43.2s and 11 iterations. TraceHistogramMax:15. Analysis of lassos took 32.9s. Construction of modules took 2.2s. Büchi inclusion checks took 6.9s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 17. Automata minimization 0.5s AutomataMinimizationTime, 17 MinimizatonAttempts, 453 StatesRemovedByMinimization, 14 NontrivialMinimizations. Non-live state removal took 0.3s Buchi closure took 0.0s. Biggest automaton had 736 states and ocurred in iteration 7. Nontrivial modules had stage [2, 1, 6, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 8/26 HoareTripleCheckerStatistics: 407 SDtfs, 1132 SDslu, 735 SDs, 0 SdLazy, 2447 SolverSat, 772 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.2s Time LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT1 conc0 concLT0 SILN0 SILU0 SILI1 SILT8 lasso0 LassoPreprocessingBenchmarks: Lassos: inital17 mio100 ax100 hnf91 lsp95 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq185 hnf93 smp79 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: 19 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 9 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 26.4s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...