./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/recursive-simple/fibo_5-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 906a4fb5 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerTermination.xml -i ../sv-benchmarks/c/recursive-simple/fibo_5-2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(F end) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 063966206f80cef10873a8e49ae0985aad7f65cb ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-906a4fb [2020-10-19 20:08:04,898 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-19 20:08:04,901 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-19 20:08:04,926 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-19 20:08:04,926 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-19 20:08:04,928 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-19 20:08:04,929 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-19 20:08:04,931 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-19 20:08:04,933 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-19 20:08:04,934 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-19 20:08:04,935 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-19 20:08:04,936 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-19 20:08:04,936 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-19 20:08:04,937 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-19 20:08:04,938 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-19 20:08:04,940 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-19 20:08:04,940 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-19 20:08:04,941 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-19 20:08:04,943 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-19 20:08:04,945 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-19 20:08:04,947 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-19 20:08:04,948 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-19 20:08:04,950 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-19 20:08:04,951 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-19 20:08:04,954 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-19 20:08:04,954 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-19 20:08:04,955 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-19 20:08:04,956 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-19 20:08:04,956 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-19 20:08:04,958 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-19 20:08:04,958 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-19 20:08:04,959 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-19 20:08:04,960 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-19 20:08:04,961 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-19 20:08:04,962 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-19 20:08:04,962 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-19 20:08:04,963 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-19 20:08:04,963 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-19 20:08:04,963 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-19 20:08:04,964 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-19 20:08:04,965 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-19 20:08:04,966 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-32bit-Automizer_Default.epf [2020-10-19 20:08:05,014 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-19 20:08:05,016 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-19 20:08:05,017 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-19 20:08:05,017 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-19 20:08:05,017 INFO L138 SettingsManager]: * Use SBE=true [2020-10-19 20:08:05,018 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2020-10-19 20:08:05,018 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2020-10-19 20:08:05,018 INFO L138 SettingsManager]: * Use old map elimination=false [2020-10-19 20:08:05,018 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2020-10-19 20:08:05,018 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2020-10-19 20:08:05,019 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2020-10-19 20:08:05,020 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-19 20:08:05,020 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-19 20:08:05,020 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-10-19 20:08:05,021 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-19 20:08:05,021 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-19 20:08:05,021 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-19 20:08:05,021 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2020-10-19 20:08:05,021 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2020-10-19 20:08:05,022 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2020-10-19 20:08:05,022 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-19 20:08:05,022 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-19 20:08:05,022 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2020-10-19 20:08:05,023 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-19 20:08:05,023 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2020-10-19 20:08:05,023 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-19 20:08:05,023 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-19 20:08:05,024 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2020-10-19 20:08:05,024 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-19 20:08:05,025 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-19 20:08:05,025 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-19 20:08:05,025 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2020-10-19 20:08:05,027 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2020-10-19 20:08:05,027 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 -> 063966206f80cef10873a8e49ae0985aad7f65cb [2020-10-19 20:08:05,341 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-19 20:08:05,361 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-19 20:08:05,365 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-19 20:08:05,368 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-19 20:08:05,368 INFO L275 PluginConnector]: CDTParser initialized [2020-10-19 20:08:05,370 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/fibo_5-2.c [2020-10-19 20:08:05,429 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c21c3405/75dbcaf401574c2198a3f27545db3b19/FLAG74fe814c5 [2020-10-19 20:08:05,888 INFO L306 CDTParser]: Found 1 translation units. [2020-10-19 20:08:05,889 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_5-2.c [2020-10-19 20:08:05,897 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c21c3405/75dbcaf401574c2198a3f27545db3b19/FLAG74fe814c5 [2020-10-19 20:08:06,288 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c21c3405/75dbcaf401574c2198a3f27545db3b19 [2020-10-19 20:08:06,291 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-19 20:08:06,298 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-19 20:08:06,300 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-19 20:08:06,300 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-19 20:08:06,303 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-19 20:08:06,304 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 08:08:06" (1/1) ... [2020-10-19 20:08:06,308 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1586832b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 08:08:06, skipping insertion in model container [2020-10-19 20:08:06,309 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 08:08:06" (1/1) ... [2020-10-19 20:08:06,318 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-19 20:08:06,337 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-19 20:08:06,569 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 20:08:06,585 INFO L203 MainTranslator]: Completed pre-run [2020-10-19 20:08:06,606 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 20:08:06,624 INFO L208 MainTranslator]: Completed translation [2020-10-19 20:08:06,625 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 08:08:06 WrapperNode [2020-10-19 20:08:06,625 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-19 20:08:06,627 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-19 20:08:06,628 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-19 20:08:06,628 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-19 20:08:06,638 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 08:08:06" (1/1) ... [2020-10-19 20:08:06,649 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 08:08:06" (1/1) ... [2020-10-19 20:08:06,732 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-19 20:08:06,733 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-19 20:08:06,733 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-19 20:08:06,733 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-19 20:08:06,740 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 08:08:06" (1/1) ... [2020-10-19 20:08:06,740 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 08:08:06" (1/1) ... [2020-10-19 20:08:06,742 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 08:08:06" (1/1) ... [2020-10-19 20:08:06,742 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 08:08:06" (1/1) ... [2020-10-19 20:08:06,745 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 08:08:06" (1/1) ... [2020-10-19 20:08:06,747 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 08:08:06" (1/1) ... [2020-10-19 20:08:06,748 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 08:08:06" (1/1) ... [2020-10-19 20:08:06,750 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-19 20:08:06,751 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-19 20:08:06,751 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-19 20:08:06,751 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-19 20:08:06,752 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 08:08:06" (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 [2020-10-19 20:08:06,829 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-19 20:08:06,830 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-19 20:08:06,830 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-19 20:08:06,830 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-19 20:08:06,830 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2020-10-19 20:08:06,830 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2020-10-19 20:08:07,055 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-19 20:08:07,056 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-19 20:08:07,058 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 08:08:07 BoogieIcfgContainer [2020-10-19 20:08:07,059 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-19 20:08:07,059 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2020-10-19 20:08:07,060 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2020-10-19 20:08:07,064 INFO L275 PluginConnector]: BuchiAutomizer initialized [2020-10-19 20:08:07,065 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-19 20:08:07,066 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 19.10 08:08:06" (1/3) ... [2020-10-19 20:08:07,067 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@70be3ea3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 19.10 08:08:07, skipping insertion in model container [2020-10-19 20:08:07,067 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-19 20:08:07,068 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 08:08:06" (2/3) ... [2020-10-19 20:08:07,068 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@70be3ea3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 19.10 08:08:07, skipping insertion in model container [2020-10-19 20:08:07,069 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-19 20:08:07,069 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 08:08:07" (3/3) ... [2020-10-19 20:08:07,071 INFO L373 chiAutomizerObserver]: Analyzing ICFG fibo_5-2.c [2020-10-19 20:08:07,135 INFO L359 BuchiCegarLoop]: Interprodecural is true [2020-10-19 20:08:07,136 INFO L360 BuchiCegarLoop]: Hoare is false [2020-10-19 20:08:07,136 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2020-10-19 20:08:07,136 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-19 20:08:07,136 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-19 20:08:07,137 INFO L364 BuchiCegarLoop]: Difference is false [2020-10-19 20:08:07,137 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-19 20:08:07,137 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2020-10-19 20:08:07,154 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 19 states. [2020-10-19 20:08:07,203 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-10-19 20:08:07,205 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 20:08:07,205 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 20:08:07,218 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2020-10-19 20:08:07,218 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-10-19 20:08:07,218 INFO L427 BuchiCegarLoop]: ======== Iteration 1============ [2020-10-19 20:08:07,219 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 19 states. [2020-10-19 20:08:07,224 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-10-19 20:08:07,225 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 20:08:07,225 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 20:08:07,226 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2020-10-19 20:08:07,226 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-10-19 20:08:07,236 INFO L794 eck$LassoCheckResult]: Stem: 13#ULTIMATE.startENTRYtrue #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(11);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 11#L-1true havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 5; 8#L27true call main_#t~ret9 := fibo(main_~x~0);< 16#fiboENTRYtrue [2020-10-19 20:08:07,237 INFO L796 eck$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 [2020-10-19 20:08:07,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:08:07,245 INFO L82 PathProgramCache]: Analyzing trace with hash 29885, now seen corresponding path program 1 times [2020-10-19 20:08:07,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 20:08:07,257 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730653763] [2020-10-19 20:08:07,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 20:08:07,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 20:08:07,370 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 20:08:07,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 20:08:07,388 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 20:08:07,413 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 20:08:07,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:08:07,415 INFO L82 PathProgramCache]: Analyzing trace with hash 1512524, now seen corresponding path program 1 times [2020-10-19 20:08:07,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 20:08:07,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32482800] [2020-10-19 20:08:07,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 20:08:07,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 20:08:07,423 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 20:08:07,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 20:08:07,426 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 20:08:07,428 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 20:08:07,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:08:07,434 INFO L82 PathProgramCache]: Analyzing trace with hash 1830210312, now seen corresponding path program 1 times [2020-10-19 20:08:07,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 20:08:07,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832380463] [2020-10-19 20:08:07,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 20:08:07,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 20:08:07,469 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 20:08:07,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 20:08:07,487 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 20:08:07,493 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 20:08:07,604 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 20:08:07,605 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 20:08:07,605 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 20:08:07,605 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 20:08:07,605 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-19 20:08:07,606 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:07,606 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 20:08:07,606 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 20:08:07,606 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-2.c_Iteration1_Loop [2020-10-19 20:08:07,606 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 20:08:07,607 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 20:08:07,623 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:08:07,629 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:08:07,638 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:08:07,642 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:08:07,646 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:08:07,722 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 20:08:07,723 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) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:07,741 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:08:07,741 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 20:08:07,751 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 20:08:07,751 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 [2020-10-19 20:08:07,783 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:08:07,784 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 20:08:07,792 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 20:08:07,792 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:07,815 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:08:07,816 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 20:08:07,823 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 20:08:07,824 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 [2020-10-19 20:08:07,854 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:08:07,854 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 20:08:07,858 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 20:08:07,858 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) [2020-10-19 20:08:07,910 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:08:07,911 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 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 [2020-10-19 20:08:07,980 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-19 20:08:07,981 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 20:08:08,013 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-19 20:08:08,015 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 20:08:08,015 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 20:08:08,015 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 20:08:08,015 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 20:08:08,016 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-19 20:08:08,016 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:08,016 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 20:08:08,016 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 20:08:08,016 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-2.c_Iteration1_Loop [2020-10-19 20:08:08,016 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 20:08:08,017 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 20:08:08,018 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:08:08,022 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:08:08,025 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:08:08,029 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:08:08,032 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:08:08,091 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 20:08:08,097 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) [2020-10-19 20:08:08,109 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 [2020-10-19 20:08:08,111 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:08:08,112 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:08:08,113 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:08:08,113 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:08:08,113 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:08:08,116 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:08:08,116 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 [2020-10-19 20:08:08,119 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:08,160 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 [2020-10-19 20:08:08,163 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:08:08,163 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:08:08,163 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:08:08,163 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:08:08,163 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:08:08,165 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:08:08,165 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:08:08,173 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:08,212 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 [2020-10-19 20:08:08,214 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:08:08,215 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:08:08,215 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:08:08,216 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:08:08,216 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:08:08,218 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:08:08,218 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:08:08,220 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 20:08:08,266 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-19 20:08:08,268 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:08:08,268 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:08:08,268 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:08:08,269 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:08:08,269 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:08:08,270 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:08:08,270 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 [2020-10-19 20:08:08,278 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) [2020-10-19 20:08:08,324 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 [2020-10-19 20:08:08,326 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:08:08,327 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:08:08,327 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:08:08,327 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:08:08,327 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:08:08,329 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:08:08,329 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 [2020-10-19 20:08:08,335 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-19 20:08:08,342 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-19 20:08:08,342 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) [2020-10-19 20:08:08,356 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-19 20:08:08,357 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-19 20:08:08,357 INFO L510 LassoAnalysis]: Proved termination. [2020-10-19 20:08:08,358 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 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:08,389 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-19 20:08:08,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:08:08,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:08,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-19 20:08:08,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:08,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:08,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-19 20:08:08,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:08,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 20:08:08,532 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 [2020-10-19 20:08:08,534 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 19 states. Second operand 4 states. [2020-10-19 20:08:08,677 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. [2020-10-19 20:08:08,678 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 [2020-10-19 20:08:08,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-19 20:08:08,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 11 transitions. [2020-10-19 20:08:08,685 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 3 letters. Loop has 4 letters. [2020-10-19 20:08:08,687 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:08:08,688 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 7 letters. Loop has 4 letters. [2020-10-19 20:08:08,688 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:08:08,689 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 3 letters. Loop has 8 letters. [2020-10-19 20:08:08,689 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:08:08,691 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 49 states and 61 transitions. [2020-10-19 20:08:08,696 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-10-19 20:08:08,705 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 49 states to 25 states and 34 transitions. [2020-10-19 20:08:08,707 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 17 [2020-10-19 20:08:08,708 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 18 [2020-10-19 20:08:08,709 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 34 transitions. [2020-10-19 20:08:08,709 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 20:08:08,709 INFO L691 BuchiCegarLoop]: Abstraction has 25 states and 34 transitions. [2020-10-19 20:08:08,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states and 34 transitions. [2020-10-19 20:08:08,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 20. [2020-10-19 20:08:08,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-19 20:08:08,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 26 transitions. [2020-10-19 20:08:08,762 INFO L714 BuchiCegarLoop]: Abstraction has 20 states and 26 transitions. [2020-10-19 20:08:08,762 INFO L594 BuchiCegarLoop]: Abstraction has 20 states and 26 transitions. [2020-10-19 20:08:08,763 INFO L427 BuchiCegarLoop]: ======== Iteration 2============ [2020-10-19 20:08:08,763 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 20 states and 26 transitions. [2020-10-19 20:08:08,764 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-10-19 20:08:08,765 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 20:08:08,765 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 20:08:08,767 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 20:08:08,767 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 20:08:08,768 INFO L794 eck$LassoCheckResult]: Stem: 132#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(11);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 130#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 5; 128#L27 call main_#t~ret9 := fibo(main_~x~0);< 138#fiboENTRY ~n := #in~n; 136#L8 assume !(~n < 1); 137#L10 assume !(1 == ~n); 125#L13 call #t~ret7 := fibo(~n - 1);< 131#fiboENTRY ~n := #in~n; 133#L8 assume ~n < 1;#res := 0; 134#fiboFINAL assume true; 124#fiboEXIT >#35#return; 126#L13-1 [2020-10-19 20:08:08,768 INFO L796 eck$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 [2020-10-19 20:08:08,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:08:08,769 INFO L82 PathProgramCache]: Analyzing trace with hash 523436175, now seen corresponding path program 1 times [2020-10-19 20:08:08,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 20:08:08,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087772565] [2020-10-19 20:08:08,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 20:08:08,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:08,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-19 20:08:08,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:08,965 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-19 20:08:08,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087772565] [2020-10-19 20:08:08,966 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 20:08:08,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-19 20:08:08,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876248993] [2020-10-19 20:08:08,975 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-19 20:08:08,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:08:08,978 INFO L82 PathProgramCache]: Analyzing trace with hash 1950983701, now seen corresponding path program 1 times [2020-10-19 20:08:08,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 20:08:08,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921530418] [2020-10-19 20:08:08,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 20:08:08,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:09,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-19 20:08:09,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:09,060 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-19 20:08:09,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921530418] [2020-10-19 20:08:09,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 20:08:09,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-19 20:08:09,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608881017] [2020-10-19 20:08:09,062 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-10-19 20:08:09,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 20:08:09,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-19 20:08:09,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-19 20:08:09,070 INFO L87 Difference]: Start difference. First operand 20 states and 26 transitions. cyclomatic complexity: 8 Second operand 6 states. [2020-10-19 20:08:09,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 20:08:09,158 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2020-10-19 20:08:09,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-19 20:08:09,160 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 26 states and 32 transitions. [2020-10-19 20:08:09,162 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-10-19 20:08:09,163 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 26 states to 24 states and 30 transitions. [2020-10-19 20:08:09,163 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 20 [2020-10-19 20:08:09,164 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 20 [2020-10-19 20:08:09,164 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 30 transitions. [2020-10-19 20:08:09,164 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 20:08:09,164 INFO L691 BuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2020-10-19 20:08:09,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states and 30 transitions. [2020-10-19 20:08:09,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-19 20:08:09,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-19 20:08:09,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2020-10-19 20:08:09,169 INFO L714 BuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2020-10-19 20:08:09,170 INFO L594 BuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2020-10-19 20:08:09,170 INFO L427 BuchiCegarLoop]: ======== Iteration 3============ [2020-10-19 20:08:09,170 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 24 states and 30 transitions. [2020-10-19 20:08:09,171 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-10-19 20:08:09,171 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 20:08:09,171 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 20:08:09,173 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 20:08:09,173 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2020-10-19 20:08:09,173 INFO L794 eck$LassoCheckResult]: Stem: 205#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(11);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 200#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 5; 201#L27 call main_#t~ret9 := fibo(main_~x~0);< 208#fiboENTRY ~n := #in~n; 211#L8 assume !(~n < 1); 212#L10 assume !(1 == ~n); 198#L13 call #t~ret7 := fibo(~n - 1);< 204#fiboENTRY ~n := #in~n; 209#L8 assume !(~n < 1); 210#L10 assume 1 == ~n;#res := 1; 213#fiboFINAL assume true; 197#fiboEXIT >#35#return; 199#L13-1 [2020-10-19 20:08:09,173 INFO L796 eck$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 [2020-10-19 20:08:09,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:08:09,174 INFO L82 PathProgramCache]: Analyzing trace with hash -953322862, now seen corresponding path program 1 times [2020-10-19 20:08:09,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 20:08:09,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603889607] [2020-10-19 20:08:09,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 20:08:09,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:09,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-19 20:08:09,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:09,234 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 20:08:09,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603889607] [2020-10-19 20:08:09,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37148453] [2020-10-19 20:08:09,235 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 [2020-10-19 20:08:09,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:09,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-19 20:08:09,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:09,310 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 20:08:09,310 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 20:08:09,311 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-19 20:08:09,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318003746] [2020-10-19 20:08:09,311 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-19 20:08:09,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:08:09,312 INFO L82 PathProgramCache]: Analyzing trace with hash -2000232554, now seen corresponding path program 1 times [2020-10-19 20:08:09,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 20:08:09,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271967613] [2020-10-19 20:08:09,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 20:08:09,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 20:08:09,322 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 20:08:09,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 20:08:09,330 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 20:08:09,333 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 20:08:09,571 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 20:08:09,571 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 20:08:09,571 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 20:08:09,571 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 20:08:09,571 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-19 20:08:09,572 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:09,572 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 20:08:09,572 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 20:08:09,572 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-2.c_Iteration3_Loop [2020-10-19 20:08:09,572 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 20:08:09,572 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 20:08:09,574 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:08:09,578 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:08:09,580 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:08:09,583 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:08:09,642 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 20:08:09,642 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) [2020-10-19 20:08:09,655 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:08:09,655 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 [2020-10-19 20:08:09,660 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 20:08:09,660 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) [2020-10-19 20:08:09,710 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:08:09,710 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 [2020-10-19 20:08:09,714 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 20:08:09,714 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) [2020-10-19 20:08:09,759 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:08:09,760 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 [2020-10-19 20:08:09,763 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 20:08:09,764 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 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 20:08:09,813 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:08:09,813 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) [2020-10-19 20:08:09,865 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-19 20:08:09,865 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 [2020-10-19 20:08:10,693 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-19 20:08:10,696 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 20:08:10,696 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 20:08:10,696 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 20:08:10,696 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 20:08:10,696 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-19 20:08:10,696 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:10,696 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 20:08:10,697 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 20:08:10,697 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-2.c_Iteration3_Loop [2020-10-19 20:08:10,697 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 20:08:10,697 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 20:08:10,698 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:08:10,701 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:08:10,704 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:08:10,712 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:08:10,756 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 20:08:10,757 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 [2020-10-19 20:08:10,778 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 [2020-10-19 20:08:10,780 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:08:10,781 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:08:10,781 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:08:10,781 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:08:10,781 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:08:10,782 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:08:10,782 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:08:10,787 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) [2020-10-19 20:08:10,833 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 [2020-10-19 20:08:10,835 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:08:10,835 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:08:10,835 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:08:10,835 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:08:10,835 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:10,837 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:08:10,837 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:08:10,839 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) [2020-10-19 20:08:10,898 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 [2020-10-19 20:08:10,901 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:08:10,901 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:08:10,901 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:08:10,901 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:08:10,901 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:08:10,904 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:08:10,904 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 [2020-10-19 20:08:10,908 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-19 20:08:10,919 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-19 20:08:10,919 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) [2020-10-19 20:08:10,932 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-19 20:08:10,932 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-19 20:08:10,932 INFO L510 LassoAnalysis]: Proved termination. [2020-10-19 20:08:10,932 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 [2020-10-19 20:08:10,965 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-19 20:08:10,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:08:11,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:11,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-19 20:08:11,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:11,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:11,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-19 20:08:11,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:11,288 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-19 20:08:11,289 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 [2020-10-19 20:08:11,289 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 24 states and 30 transitions. cyclomatic complexity: 8 Second operand 9 states. [2020-10-19 20:08:11,577 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. [2020-10-19 20:08:11,578 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 [2020-10-19 20:08:11,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-10-19 20:08:11,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 41 transitions. [2020-10-19 20:08:11,579 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 41 transitions. Stem has 12 letters. Loop has 22 letters. [2020-10-19 20:08:11,581 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:08:11,581 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 41 transitions. Stem has 34 letters. Loop has 22 letters. [2020-10-19 20:08:11,582 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:08:11,582 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 41 transitions. Stem has 12 letters. Loop has 44 letters. [2020-10-19 20:08:11,583 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:08:11,583 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 159 states and 215 transitions. [2020-10-19 20:08:11,592 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 15 [2020-10-19 20:08:11,598 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 159 states to 128 states and 180 transitions. [2020-10-19 20:08:11,598 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 74 [2020-10-19 20:08:11,599 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 79 [2020-10-19 20:08:11,599 INFO L73 IsDeterministic]: Start isDeterministic. Operand 128 states and 180 transitions. [2020-10-19 20:08:11,600 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 20:08:11,600 INFO L691 BuchiCegarLoop]: Abstraction has 128 states and 180 transitions. [2020-10-19 20:08:11,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states and 180 transitions. [2020-10-19 20:08:11,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 106. [2020-10-19 20:08:11,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-19 20:08:11,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 140 transitions. [2020-10-19 20:08:11,618 INFO L714 BuchiCegarLoop]: Abstraction has 106 states and 140 transitions. [2020-10-19 20:08:11,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 20:08:11,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-19 20:08:11,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-19 20:08:11,619 INFO L87 Difference]: Start difference. First operand 106 states and 140 transitions. Second operand 8 states. [2020-10-19 20:08:11,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 20:08:11,709 INFO L93 Difference]: Finished difference Result 125 states and 167 transitions. [2020-10-19 20:08:11,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-19 20:08:11,710 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 125 states and 167 transitions. [2020-10-19 20:08:11,715 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 15 [2020-10-19 20:08:11,719 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 125 states to 122 states and 164 transitions. [2020-10-19 20:08:11,719 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 77 [2020-10-19 20:08:11,720 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 77 [2020-10-19 20:08:11,720 INFO L73 IsDeterministic]: Start isDeterministic. Operand 122 states and 164 transitions. [2020-10-19 20:08:11,720 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 20:08:11,721 INFO L691 BuchiCegarLoop]: Abstraction has 122 states and 164 transitions. [2020-10-19 20:08:11,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states and 164 transitions. [2020-10-19 20:08:11,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 106. [2020-10-19 20:08:11,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-19 20:08:11,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 139 transitions. [2020-10-19 20:08:11,733 INFO L714 BuchiCegarLoop]: Abstraction has 106 states and 139 transitions. [2020-10-19 20:08:11,733 INFO L594 BuchiCegarLoop]: Abstraction has 106 states and 139 transitions. [2020-10-19 20:08:11,733 INFO L427 BuchiCegarLoop]: ======== Iteration 4============ [2020-10-19 20:08:11,734 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 106 states and 139 transitions. [2020-10-19 20:08:11,736 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 15 [2020-10-19 20:08:11,736 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 20:08:11,736 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 20:08:11,737 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [5, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 20:08:11,737 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1] [2020-10-19 20:08:11,740 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(11);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 := 5; 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 [2020-10-19 20:08:11,740 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 [2020-10-19 20:08:11,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:08:11,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1335554545, now seen corresponding path program 1 times [2020-10-19 20:08:11,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 20:08:11,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443711933] [2020-10-19 20:08:11,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 20:08:11,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:11,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-19 20:08:11,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:11,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-19 20:08:11,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:11,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-19 20:08:11,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:11,848 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-19 20:08:11,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443711933] [2020-10-19 20:08:11,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761276207] [2020-10-19 20:08:11,848 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 [2020-10-19 20:08:11,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:11,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-19 20:08:11,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:11,946 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-19 20:08:11,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 20:08:11,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-19 20:08:11,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082189489] [2020-10-19 20:08:11,947 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-19 20:08:11,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:08:11,948 INFO L82 PathProgramCache]: Analyzing trace with hash 350977484, now seen corresponding path program 1 times [2020-10-19 20:08:11,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 20:08:11,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62833291] [2020-10-19 20:08:11,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 20:08:11,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 20:08:11,954 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 20:08:11,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 20:08:11,957 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 20:08:11,959 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 20:08:12,055 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 20:08:12,055 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 20:08:12,055 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 20:08:12,056 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 20:08:12,056 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-19 20:08:12,056 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:12,056 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 20:08:12,056 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 20:08:12,056 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-2.c_Iteration4_Loop [2020-10-19 20:08:12,056 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 20:08:12,056 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 20:08:12,058 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:08:12,061 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:08:12,069 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:08:12,075 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:08:12,132 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 20:08:12,132 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) [2020-10-19 20:08:12,135 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:08:12,135 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 [2020-10-19 20:08:12,139 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 20:08:12,139 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) [2020-10-19 20:08:12,175 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:08:12,175 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 26 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 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 20:08:12,205 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-19 20:08:12,206 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:13,270 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-19 20:08:13,272 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 20:08:13,273 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 20:08:13,273 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 20:08:13,273 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 20:08:13,273 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-19 20:08:13,273 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:13,273 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 20:08:13,273 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 20:08:13,273 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-2.c_Iteration4_Loop [2020-10-19 20:08:13,273 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 20:08:13,273 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 20:08:13,274 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:08:13,277 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:08:13,289 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:08:13,291 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:08:13,333 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 20:08:13,334 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) Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:13,336 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-19 20:08:13,337 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:08:13,337 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:08:13,337 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:08:13,337 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:08:13,337 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:08:13,338 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:08:13,338 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:08:13,340 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 [2020-10-19 20:08:13,364 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 [2020-10-19 20:08:13,366 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:08:13,366 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:08:13,366 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:08:13,366 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:08:13,366 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:08:13,369 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:08:13,369 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:08:13,372 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-19 20:08:13,377 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-19 20:08:13,377 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) [2020-10-19 20:08:13,381 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-19 20:08:13,381 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-19 20:08:13,381 INFO L510 LassoAnalysis]: Proved termination. [2020-10-19 20:08:13,381 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:13,404 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-19 20:08:13,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:08:13,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:13,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-19 20:08:13,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:13,502 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:08:13,508 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:08:13,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:13,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-19 20:08:13,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:13,603 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 20:08:13,604 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 [2020-10-19 20:08:13,604 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 106 states and 139 transitions. cyclomatic complexity: 38 Second operand 8 states. [2020-10-19 20:08:13,852 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. [2020-10-19 20:08:13,853 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 [2020-10-19 20:08:13,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-19 20:08:13,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 37 transitions. [2020-10-19 20:08:13,854 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 37 transitions. Stem has 28 letters. Loop has 10 letters. [2020-10-19 20:08:13,855 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:08:13,855 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-19 20:08:13,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:08:13,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:13,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-19 20:08:13,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:13,926 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:08:13,930 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:08:13,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:13,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-19 20:08:13,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:14,033 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 20:08:14,033 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 [2020-10-19 20:08:14,033 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 106 states and 139 transitions. cyclomatic complexity: 38 Second operand 8 states. [2020-10-19 20:08:14,234 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. [2020-10-19 20:08:14,235 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 [2020-10-19 20:08:14,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-19 20:08:14,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 24 transitions. [2020-10-19 20:08:14,236 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 24 transitions. Stem has 28 letters. Loop has 10 letters. [2020-10-19 20:08:14,236 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:08:14,236 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-19 20:08:14,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:08:14,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:14,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-19 20:08:14,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:14,327 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:08:14,332 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:08:14,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:14,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-19 20:08:14,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:14,420 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 20:08:14,421 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 [2020-10-19 20:08:14,421 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 106 states and 139 transitions. cyclomatic complexity: 38 Second operand 8 states. [2020-10-19 20:08:14,732 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. [2020-10-19 20:08:14,733 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 [2020-10-19 20:08:14,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-19 20:08:14,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 42 transitions. [2020-10-19 20:08:14,734 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 42 transitions. Stem has 28 letters. Loop has 10 letters. [2020-10-19 20:08:14,735 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:08:14,735 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 42 transitions. Stem has 38 letters. Loop has 10 letters. [2020-10-19 20:08:14,739 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:08:14,739 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 42 transitions. Stem has 28 letters. Loop has 20 letters. [2020-10-19 20:08:14,741 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:08:14,741 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 810 states and 1071 transitions. [2020-10-19 20:08:14,759 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 44 [2020-10-19 20:08:14,773 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 810 states to 419 states and 599 transitions. [2020-10-19 20:08:14,774 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 159 [2020-10-19 20:08:14,775 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 183 [2020-10-19 20:08:14,775 INFO L73 IsDeterministic]: Start isDeterministic. Operand 419 states and 599 transitions. [2020-10-19 20:08:14,775 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 20:08:14,775 INFO L691 BuchiCegarLoop]: Abstraction has 419 states and 599 transitions. [2020-10-19 20:08:14,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states and 599 transitions. [2020-10-19 20:08:14,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 332. [2020-10-19 20:08:14,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 332 states. [2020-10-19 20:08:14,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 449 transitions. [2020-10-19 20:08:14,834 INFO L714 BuchiCegarLoop]: Abstraction has 332 states and 449 transitions. [2020-10-19 20:08:14,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 20:08:14,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-19 20:08:14,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-19 20:08:14,835 INFO L87 Difference]: Start difference. First operand 332 states and 449 transitions. Second operand 11 states. [2020-10-19 20:08:15,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 20:08:15,112 INFO L93 Difference]: Finished difference Result 504 states and 746 transitions. [2020-10-19 20:08:15,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-19 20:08:15,113 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 504 states and 746 transitions. [2020-10-19 20:08:15,122 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-10-19 20:08:15,132 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 504 states to 502 states and 743 transitions. [2020-10-19 20:08:15,133 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 226 [2020-10-19 20:08:15,134 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 226 [2020-10-19 20:08:15,134 INFO L73 IsDeterministic]: Start isDeterministic. Operand 502 states and 743 transitions. [2020-10-19 20:08:15,134 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 20:08:15,134 INFO L691 BuchiCegarLoop]: Abstraction has 502 states and 743 transitions. [2020-10-19 20:08:15,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states and 743 transitions. [2020-10-19 20:08:15,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 454. [2020-10-19 20:08:15,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 454 states. [2020-10-19 20:08:15,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 675 transitions. [2020-10-19 20:08:15,170 INFO L714 BuchiCegarLoop]: Abstraction has 454 states and 675 transitions. [2020-10-19 20:08:15,170 INFO L594 BuchiCegarLoop]: Abstraction has 454 states and 675 transitions. [2020-10-19 20:08:15,171 INFO L427 BuchiCegarLoop]: ======== Iteration 5============ [2020-10-19 20:08:15,171 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 454 states and 675 transitions. [2020-10-19 20:08:15,176 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-10-19 20:08:15,176 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 20:08:15,176 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 20:08:15,178 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 20:08:15,178 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-10-19 20:08:15,178 INFO L794 eck$LassoCheckResult]: Stem: 3814#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(11);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 3797#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 5; 3798#L27 call main_#t~ret9 := fibo(main_~x~0);< 3819#fiboENTRY ~n := #in~n; 3861#L8 assume !(~n < 1); 3860#L10 assume !(1 == ~n); 3856#L13 call #t~ret7 := fibo(~n - 1);< 3858#fiboENTRY ~n := #in~n; 3859#L8 assume !(~n < 1); 3855#L10 assume !(1 == ~n); 3841#L13 call #t~ret7 := fibo(~n - 1);< 3852#fiboENTRY ~n := #in~n; 3853#L8 assume !(~n < 1); 3857#L10 assume !(1 == ~n); 3840#L13 call #t~ret7 := fibo(~n - 1);< 3852#fiboENTRY ~n := #in~n; 3854#L8 assume !(~n < 1); 3839#L10 assume 1 == ~n;#res := 1; 3842#fiboFINAL assume true; 3899#fiboEXIT >#35#return; 3895#L13-1 call #t~ret8 := fibo(~n - 2);< 3897#fiboENTRY ~n := #in~n; 3924#L8 assume !(~n < 1); 3914#L10 assume !(1 == ~n); 3916#L13 call #t~ret7 := fibo(~n - 1);< 3954#fiboENTRY ~n := #in~n; 3998#L8 assume !(~n < 1); 3988#L10 assume !(1 == ~n); 3989#L13 call #t~ret7 := fibo(~n - 1);< 4038#fiboENTRY [2020-10-19 20:08:15,179 INFO L796 eck$LassoCheckResult]: Loop: 4038#fiboENTRY ~n := #in~n; 4066#L8 assume !(~n < 1); 4052#L10 assume !(1 == ~n); 4037#L13 call #t~ret7 := fibo(~n - 1);< 4038#fiboENTRY [2020-10-19 20:08:15,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:08:15,179 INFO L82 PathProgramCache]: Analyzing trace with hash -777601154, now seen corresponding path program 1 times [2020-10-19 20:08:15,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 20:08:15,179 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419762711] [2020-10-19 20:08:15,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 20:08:15,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:15,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-19 20:08:15,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:15,300 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 30 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-19 20:08:15,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419762711] [2020-10-19 20:08:15,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839548984] [2020-10-19 20:08:15,300 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 [2020-10-19 20:08:15,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:15,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-19 20:08:15,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:15,357 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 30 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-19 20:08:15,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 20:08:15,358 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-19 20:08:15,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591219071] [2020-10-19 20:08:15,358 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-19 20:08:15,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:08:15,359 INFO L82 PathProgramCache]: Analyzing trace with hash 1512524, now seen corresponding path program 2 times [2020-10-19 20:08:15,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 20:08:15,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208007994] [2020-10-19 20:08:15,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 20:08:15,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 20:08:15,362 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 20:08:15,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 20:08:15,365 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 20:08:15,366 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 20:08:15,406 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 20:08:15,407 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 20:08:15,407 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 20:08:15,407 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 20:08:15,407 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-19 20:08:15,407 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:15,407 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 20:08:15,407 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 20:08:15,407 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-2.c_Iteration5_Loop [2020-10-19 20:08:15,408 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 20:08:15,408 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 20:08:15,409 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:08:15,412 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:08:15,414 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:08:15,416 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:08:15,423 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:08:15,466 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 20:08:15,466 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) [2020-10-19 20:08:15,470 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:08:15,470 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 [2020-10-19 20:08:15,473 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 20:08:15,474 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 [2020-10-19 20:08:15,498 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:08:15,498 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 20:08:15,501 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 20:08:15,502 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) Waiting until toolchain timeout for monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:15,524 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:08:15,524 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 20:08:15,526 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 20:08:15,526 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 [2020-10-19 20:08:15,549 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:08:15,549 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) Waiting until toolchain timeout for monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:15,578 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-19 20:08:15,578 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 20:08:15,642 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-19 20:08:15,644 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 20:08:15,644 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 20:08:15,644 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 20:08:15,644 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 20:08:15,644 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-19 20:08:15,644 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:15,644 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 20:08:15,645 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 20:08:15,645 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-2.c_Iteration5_Loop [2020-10-19 20:08:15,645 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 20:08:15,645 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 20:08:15,645 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:08:15,649 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:08:15,650 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:08:15,654 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:08:15,656 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:08:15,704 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 20:08:15,704 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 [2020-10-19 20:08:15,710 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 [2020-10-19 20:08:15,711 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:08:15,712 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:08:15,712 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:08:15,712 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:08:15,712 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:08:15,713 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:08:15,713 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:08:15,716 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) Waiting until toolchain timeout for monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:15,740 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 [2020-10-19 20:08:15,741 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:08:15,741 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:08:15,741 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:08:15,741 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:08:15,741 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:08:15,741 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:08:15,742 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:08:15,750 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) [2020-10-19 20:08:15,788 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 [2020-10-19 20:08:15,790 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:08:15,790 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:08:15,790 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:08:15,790 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:08:15,790 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:08:15,791 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:08:15,791 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 39 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:15,793 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 20:08:15,826 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 [2020-10-19 20:08:15,828 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:08:15,828 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:08:15,828 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:08:15,828 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:08:15,828 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:08:15,829 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:08:15,829 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 [2020-10-19 20:08:15,833 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 [2020-10-19 20:08:15,858 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-19 20:08:15,859 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:08:15,860 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:08:15,860 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:08:15,860 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:08:15,860 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:08:15,861 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:08:15,861 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:08:15,863 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-19 20:08:15,866 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-19 20:08:15,866 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) Waiting until toolchain timeout for monitored process 42 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:15,868 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-19 20:08:15,868 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-19 20:08:15,868 INFO L510 LassoAnalysis]: Proved termination. [2020-10-19 20:08:15,868 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_#in~n) = 1*fibo_#in~n Supporting invariants [] [2020-10-19 20:08:15,889 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-19 20:08:15,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:08:15,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:15,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-19 20:08:15,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:15,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:15,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-19 20:08:15,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:15,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 20:08:15,991 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 [2020-10-19 20:08:15,991 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 454 states and 675 transitions. cyclomatic complexity: 231 Second operand 5 states. [2020-10-19 20:08:16,078 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 454 states and 675 transitions. cyclomatic complexity: 231. Second operand 5 states. Result 464 states and 685 transitions. Complement of second has 13 states. [2020-10-19 20:08:16,079 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 [2020-10-19 20:08:16,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-10-19 20:08:16,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 13 transitions. [2020-10-19 20:08:16,080 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 13 transitions. Stem has 29 letters. Loop has 4 letters. [2020-10-19 20:08:16,080 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:08:16,080 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-19 20:08:16,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:08:16,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:16,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-19 20:08:16,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:16,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:16,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-19 20:08:16,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:16,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 20:08:16,189 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 [2020-10-19 20:08:16,190 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 454 states and 675 transitions. cyclomatic complexity: 231 Second operand 5 states. [2020-10-19 20:08:16,255 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 454 states and 675 transitions. cyclomatic complexity: 231. Second operand 5 states. Result 464 states and 685 transitions. Complement of second has 13 states. [2020-10-19 20:08:16,257 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 [2020-10-19 20:08:16,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-10-19 20:08:16,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 13 transitions. [2020-10-19 20:08:16,257 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 13 transitions. Stem has 29 letters. Loop has 4 letters. [2020-10-19 20:08:16,258 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:08:16,258 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-19 20:08:16,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:08:16,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:16,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-19 20:08:16,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:16,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:16,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-19 20:08:16,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:16,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 20:08:16,359 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 [2020-10-19 20:08:16,359 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 454 states and 675 transitions. cyclomatic complexity: 231 Second operand 5 states. [2020-10-19 20:08:16,464 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 454 states and 675 transitions. cyclomatic complexity: 231. Second operand 5 states. Result 615 states and 859 transitions. Complement of second has 14 states. [2020-10-19 20:08:16,465 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 [2020-10-19 20:08:16,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-10-19 20:08:16,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 21 transitions. [2020-10-19 20:08:16,467 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 29 letters. Loop has 4 letters. [2020-10-19 20:08:16,467 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:08:16,468 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 33 letters. Loop has 4 letters. [2020-10-19 20:08:16,469 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:08:16,469 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 29 letters. Loop has 8 letters. [2020-10-19 20:08:16,470 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:08:16,471 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 615 states and 859 transitions. [2020-10-19 20:08:16,479 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-10-19 20:08:16,488 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 615 states to 518 states and 750 transitions. [2020-10-19 20:08:16,489 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 187 [2020-10-19 20:08:16,489 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 196 [2020-10-19 20:08:16,490 INFO L73 IsDeterministic]: Start isDeterministic. Operand 518 states and 750 transitions. [2020-10-19 20:08:16,494 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 20:08:16,494 INFO L691 BuchiCegarLoop]: Abstraction has 518 states and 750 transitions. [2020-10-19 20:08:16,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states and 750 transitions. [2020-10-19 20:08:16,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 488. [2020-10-19 20:08:16,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 488 states. [2020-10-19 20:08:16,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 714 transitions. [2020-10-19 20:08:16,523 INFO L714 BuchiCegarLoop]: Abstraction has 488 states and 714 transitions. [2020-10-19 20:08:16,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 20:08:16,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-19 20:08:16,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-10-19 20:08:16,525 INFO L87 Difference]: Start difference. First operand 488 states and 714 transitions. Second operand 12 states. [2020-10-19 20:08:16,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 20:08:16,724 INFO L93 Difference]: Finished difference Result 547 states and 814 transitions. [2020-10-19 20:08:16,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-19 20:08:16,725 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 547 states and 814 transitions. [2020-10-19 20:08:16,734 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-10-19 20:08:16,744 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 547 states to 541 states and 803 transitions. [2020-10-19 20:08:16,744 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 212 [2020-10-19 20:08:16,745 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 212 [2020-10-19 20:08:16,745 INFO L73 IsDeterministic]: Start isDeterministic. Operand 541 states and 803 transitions. [2020-10-19 20:08:16,745 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 20:08:16,745 INFO L691 BuchiCegarLoop]: Abstraction has 541 states and 803 transitions. [2020-10-19 20:08:16,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states and 803 transitions. [2020-10-19 20:08:16,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 504. [2020-10-19 20:08:16,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 504 states. [2020-10-19 20:08:16,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 746 transitions. [2020-10-19 20:08:16,769 INFO L714 BuchiCegarLoop]: Abstraction has 504 states and 746 transitions. [2020-10-19 20:08:16,770 INFO L594 BuchiCegarLoop]: Abstraction has 504 states and 746 transitions. [2020-10-19 20:08:16,770 INFO L427 BuchiCegarLoop]: ======== Iteration 6============ [2020-10-19 20:08:16,770 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 504 states and 746 transitions. [2020-10-19 20:08:16,774 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-10-19 20:08:16,774 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 20:08:16,774 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 20:08:16,776 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [8, 8, 7, 6, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 20:08:16,776 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-10-19 20:08:16,777 INFO L794 eck$LassoCheckResult]: Stem: 7329#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(11);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 7321#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 5; 7317#L27 call main_#t~ret9 := fibo(main_~x~0);< 7339#fiboENTRY ~n := #in~n; 7340#L8 assume !(~n < 1); 7376#L10 assume !(1 == ~n); 7374#L13 call #t~ret7 := fibo(~n - 1);< 7379#fiboENTRY ~n := #in~n; 7377#L8 assume !(~n < 1); 7378#L10 assume !(1 == ~n); 7372#L13 call #t~ret7 := fibo(~n - 1);< 7375#fiboENTRY ~n := #in~n; 7403#L8 assume !(~n < 1); 7401#L10 assume !(1 == ~n); 7397#L13 call #t~ret7 := fibo(~n - 1);< 7399#fiboENTRY ~n := #in~n; 7412#L8 assume !(~n < 1); 7411#L10 assume !(1 == ~n); 7395#L13 call #t~ret7 := fibo(~n - 1);< 7399#fiboENTRY ~n := #in~n; 7416#L8 assume !(~n < 1); 7591#L10 assume 1 == ~n;#res := 1; 7589#fiboFINAL assume true; 7587#fiboEXIT >#35#return; 7579#L13-1 call #t~ret8 := fibo(~n - 2);< 7584#fiboENTRY ~n := #in~n; 7700#L8 assume !(~n < 1); 7617#L10 assume !(1 == ~n); 7356#L13 call #t~ret7 := fibo(~n - 1);< 7354#fiboENTRY ~n := #in~n; 7357#L8 assume !(~n < 1); 7779#L10 assume !(1 == ~n); 7344#L13 call #t~ret7 := fibo(~n - 1);< 7359#fiboENTRY ~n := #in~n; 7360#L8 assume !(~n < 1); 7370#L10 assume !(1 == ~n); 7342#L13 [2020-10-19 20:08:16,777 INFO L796 eck$LassoCheckResult]: Loop: 7342#L13 call #t~ret7 := fibo(~n - 1);< 7359#fiboENTRY ~n := #in~n; 7360#L8 assume !(~n < 1); 7370#L10 assume !(1 == ~n); 7342#L13 [2020-10-19 20:08:16,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:08:16,777 INFO L82 PathProgramCache]: Analyzing trace with hash 42869646, now seen corresponding path program 2 times [2020-10-19 20:08:16,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 20:08:16,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323158493] [2020-10-19 20:08:16,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 20:08:16,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:16,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-19 20:08:16,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:16,880 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 81 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-19 20:08:16,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323158493] [2020-10-19 20:08:16,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064683316] [2020-10-19 20:08:16,881 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 [2020-10-19 20:08:16,915 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-19 20:08:16,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 20:08:16,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-19 20:08:16,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:16,938 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 81 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-19 20:08:16,939 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 20:08:16,939 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-19 20:08:16,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457181748] [2020-10-19 20:08:16,939 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-19 20:08:16,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:08:16,940 INFO L82 PathProgramCache]: Analyzing trace with hash 1955414, now seen corresponding path program 3 times [2020-10-19 20:08:16,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 20:08:16,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558386333] [2020-10-19 20:08:16,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 20:08:16,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 20:08:16,943 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 20:08:16,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 20:08:16,945 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 20:08:16,946 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 20:08:16,992 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 20:08:16,992 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 20:08:16,992 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 20:08:16,993 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 20:08:16,993 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-19 20:08:16,993 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:16,994 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 20:08:16,994 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 20:08:16,994 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-2.c_Iteration6_Loop [2020-10-19 20:08:16,994 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 20:08:16,994 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 20:08:16,996 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:08:17,000 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:08:17,003 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:08:17,014 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:08:17,076 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 20:08:17,076 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) [2020-10-19 20:08:17,080 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:08:17,080 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 44 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:17,083 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 20:08:17,084 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) [2020-10-19 20:08:17,120 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:08:17,121 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 [2020-10-19 20:08:17,124 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 20:08:17,124 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) [2020-10-19 20:08:17,161 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:08:17,161 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 46 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 20:08:17,206 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-19 20:08:17,206 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 47 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:23,623 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-19 20:08:23,625 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 20:08:23,625 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 20:08:23,625 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 20:08:23,625 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 20:08:23,626 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-19 20:08:23,626 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:23,626 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 20:08:23,626 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 20:08:23,626 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-2.c_Iteration6_Loop [2020-10-19 20:08:23,626 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 20:08:23,626 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 20:08:23,627 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:08:23,632 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:08:23,634 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:08:23,643 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:08:23,690 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 20:08:23,691 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 [2020-10-19 20:08:23,695 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 [2020-10-19 20:08:23,696 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:08:23,696 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:08:23,697 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:08:23,697 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:08:23,697 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:08:23,697 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:08:23,697 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:08:23,698 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 [2020-10-19 20:08:23,720 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 [2020-10-19 20:08:23,721 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:08:23,721 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:08:23,721 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:08:23,721 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:08:23,722 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:08:23,722 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:08:23,722 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:08:23,723 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-19 20:08:23,747 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 [2020-10-19 20:08:23,748 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:08:23,748 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:08:23,748 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:08:23,748 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:08:23,748 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:08:23,749 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:08:23,749 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:08:23,751 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-19 20:08:23,753 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2020-10-19 20:08:23,753 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) [2020-10-19 20:08:23,756 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-19 20:08:23,756 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-19 20:08:23,756 INFO L510 LassoAnalysis]: Proved termination. [2020-10-19 20:08:23,756 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 [2020-10-19 20:08:23,776 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-19 20:08:23,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:08:23,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:23,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-19 20:08:23,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:23,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:23,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-19 20:08:23,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:23,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 20:08:23,918 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 [2020-10-19 20:08:23,918 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 504 states and 746 transitions. cyclomatic complexity: 252 Second operand 6 states. [2020-10-19 20:08:23,990 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 504 states and 746 transitions. cyclomatic complexity: 252. Second operand 6 states. Result 516 states and 759 transitions. Complement of second has 18 states. [2020-10-19 20:08:23,990 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 [2020-10-19 20:08:23,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-19 20:08:23,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 13 transitions. [2020-10-19 20:08:23,991 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 13 transitions. Stem has 36 letters. Loop has 4 letters. [2020-10-19 20:08:23,991 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:08:23,992 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-19 20:08:24,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:08:24,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:24,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-19 20:08:24,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:24,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:24,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-19 20:08:24,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:24,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 20:08:24,136 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 [2020-10-19 20:08:24,136 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 504 states and 746 transitions. cyclomatic complexity: 252 Second operand 6 states. [2020-10-19 20:08:24,245 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 504 states and 746 transitions. cyclomatic complexity: 252. Second operand 6 states. Result 746 states and 1075 transitions. Complement of second has 22 states. [2020-10-19 20:08:24,246 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 [2020-10-19 20:08:24,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-19 20:08:24,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 16 transitions. [2020-10-19 20:08:24,247 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 36 letters. Loop has 4 letters. [2020-10-19 20:08:24,248 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:08:24,248 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 40 letters. Loop has 4 letters. [2020-10-19 20:08:24,248 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:08:24,248 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 36 letters. Loop has 8 letters. [2020-10-19 20:08:24,249 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:08:24,249 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 746 states and 1075 transitions. [2020-10-19 20:08:24,259 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-10-19 20:08:24,268 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 746 states to 682 states and 1006 transitions. [2020-10-19 20:08:24,269 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 226 [2020-10-19 20:08:24,270 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 254 [2020-10-19 20:08:24,270 INFO L73 IsDeterministic]: Start isDeterministic. Operand 682 states and 1006 transitions. [2020-10-19 20:08:24,270 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 20:08:24,270 INFO L691 BuchiCegarLoop]: Abstraction has 682 states and 1006 transitions. [2020-10-19 20:08:24,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states and 1006 transitions. [2020-10-19 20:08:24,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 665. [2020-10-19 20:08:24,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 665 states. [2020-10-19 20:08:24,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 981 transitions. [2020-10-19 20:08:24,296 INFO L714 BuchiCegarLoop]: Abstraction has 665 states and 981 transitions. [2020-10-19 20:08:24,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 20:08:24,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-19 20:08:24,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-10-19 20:08:24,297 INFO L87 Difference]: Start difference. First operand 665 states and 981 transitions. Second operand 13 states. [2020-10-19 20:08:24,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 20:08:24,597 INFO L93 Difference]: Finished difference Result 164 states and 189 transitions. [2020-10-19 20:08:24,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-19 20:08:24,598 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 164 states and 189 transitions. [2020-10-19 20:08:24,601 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-10-19 20:08:24,601 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 164 states to 0 states and 0 transitions. [2020-10-19 20:08:24,601 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2020-10-19 20:08:24,601 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2020-10-19 20:08:24,602 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2020-10-19 20:08:24,602 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-19 20:08:24,602 INFO L691 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-19 20:08:24,602 INFO L714 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-19 20:08:24,602 INFO L594 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-19 20:08:24,602 INFO L427 BuchiCegarLoop]: ======== Iteration 7============ [2020-10-19 20:08:24,602 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2020-10-19 20:08:24,603 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-10-19 20:08:24,603 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2020-10-19 20:08:24,610 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 19.10 08:08:24 BoogieIcfgContainer [2020-10-19 20:08:24,611 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2020-10-19 20:08:24,614 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-19 20:08:24,614 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-19 20:08:24,615 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-19 20:08:24,615 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 08:08:07" (3/4) ... [2020-10-19 20:08:24,618 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-10-19 20:08:24,619 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-19 20:08:24,621 INFO L168 Benchmark]: Toolchain (without parser) took 18327.44 ms. Allocated memory was 1.0 GB in the beginning and 1.4 GB in the end (delta: 325.1 MB). Free memory was 954.6 MB in the beginning and 1.3 GB in the end (delta: -344.1 MB). There was no memory consumed. Max. memory is 11.5 GB. [2020-10-19 20:08:24,623 INFO L168 Benchmark]: CDTParser took 1.13 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2020-10-19 20:08:24,629 INFO L168 Benchmark]: CACSL2BoogieTranslator took 327.36 ms. Allocated memory is still 1.0 GB. Free memory was 954.6 MB in the beginning and 943.9 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2020-10-19 20:08:24,630 INFO L168 Benchmark]: Boogie Procedure Inliner took 104.39 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 136.8 MB). Free memory was 943.9 MB in the beginning and 1.1 GB in the end (delta: -189.1 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. [2020-10-19 20:08:24,635 INFO L168 Benchmark]: Boogie Preprocessor took 17.59 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.7 MB). Peak memory consumption was 6.7 MB. Max. memory is 11.5 GB. [2020-10-19 20:08:24,635 INFO L168 Benchmark]: RCFGBuilder took 308.15 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 24.4 MB). Peak memory consumption was 24.4 MB. Max. memory is 11.5 GB. [2020-10-19 20:08:24,638 INFO L168 Benchmark]: BuchiAutomizer took 17551.27 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 188.2 MB). Free memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: -196.8 MB). There was no memory consumed. Max. memory is 11.5 GB. [2020-10-19 20:08:24,638 INFO L168 Benchmark]: Witness Printer took 4.63 ms. Allocated memory is still 1.4 GB. Free memory is still 1.3 GB. There was no memory consumed. Max. memory is 11.5 GB. [2020-10-19 20:08:24,646 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.13 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 327.36 ms. Allocated memory is still 1.0 GB. Free memory was 954.6 MB in the beginning and 943.9 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 104.39 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 136.8 MB). Free memory was 943.9 MB in the beginning and 1.1 GB in the end (delta: -189.1 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 17.59 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.7 MB). Peak memory consumption was 6.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 308.15 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 24.4 MB). Peak memory consumption was 24.4 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 17551.27 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 188.2 MB). Free memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: -196.8 MB). There was no memory consumed. Max. memory is 11.5 GB. * Witness Printer took 4.63 ms. Allocated memory is still 1.4 GB. Free memory is still 1.3 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 10 terminating modules (5 trivial, 3 deterministic, 2 nondeterministic). One deterministic module has affine ranking function \old(n) and consists of 4 locations. One deterministic module has affine ranking function n and consists of 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. 5 modules have a trivial ranking function, the largest among these consists of 13 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 17.4s and 7 iterations. TraceHistogramMax:8. Analysis of lassos took 12.6s. Construction of modules took 1.1s. Büchi inclusion checks took 3.1s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 9. Automata minimization 0.2s AutomataMinimizationTime, 9 MinimizatonAttempts, 262 StatesRemovedByMinimization, 8 NontrivialMinimizations. Non-live state removal took 0.1s Buchi closure took 0.0s. Biggest automaton had 504 states and ocurred in iteration 5. Nontrivial modules had stage [2, 1, 2, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 8/26 HoareTripleCheckerStatistics: 189 SDtfs, 414 SDslu, 261 SDs, 0 SdLazy, 974 SolverSat, 224 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.1s Time LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT1 conc0 concLT0 SILN0 SILU0 SILI1 SILT4 lasso0 LassoPreprocessingBenchmarks: Lassos: inital17 mio100 ax100 hnf89 lsp92 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq188 hnf92 smp82 dnf100 smp100 tf110 neg96 sie106 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 21ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 13 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 5 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 8.8s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...