./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/recursive-simple/fibo_2calls_8-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 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_2calls_8-2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(F end) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f63c6229f0a09709710be77b7ac5a08c2c6f5392 ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-906a4fb [2020-10-19 20:07:49,957 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-19 20:07:49,960 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-19 20:07:49,989 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-19 20:07:49,989 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-19 20:07:49,993 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-19 20:07:49,995 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-19 20:07:49,997 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-19 20:07:49,999 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-19 20:07:50,000 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-19 20:07:50,002 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-19 20:07:50,003 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-19 20:07:50,003 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-19 20:07:50,005 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-19 20:07:50,006 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-19 20:07:50,007 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-19 20:07:50,008 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-19 20:07:50,009 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-19 20:07:50,011 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-19 20:07:50,014 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-19 20:07:50,016 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-19 20:07:50,017 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-19 20:07:50,019 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-19 20:07:50,020 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-19 20:07:50,024 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-19 20:07:50,024 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-19 20:07:50,025 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-19 20:07:50,026 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-19 20:07:50,027 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-19 20:07:50,028 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-19 20:07:50,028 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-19 20:07:50,029 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-19 20:07:50,030 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-19 20:07:50,031 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-19 20:07:50,033 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-19 20:07:50,033 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-19 20:07:50,034 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-19 20:07:50,034 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-19 20:07:50,035 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-19 20:07:50,036 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-19 20:07:50,037 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-19 20:07:50,038 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-32bit-Automizer_Default.epf [2020-10-19 20:07:50,067 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-19 20:07:50,068 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-19 20:07:50,069 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-19 20:07:50,069 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-19 20:07:50,070 INFO L138 SettingsManager]: * Use SBE=true [2020-10-19 20:07:50,070 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2020-10-19 20:07:50,070 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2020-10-19 20:07:50,070 INFO L138 SettingsManager]: * Use old map elimination=false [2020-10-19 20:07:50,071 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2020-10-19 20:07:50,071 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2020-10-19 20:07:50,071 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2020-10-19 20:07:50,072 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-19 20:07:50,072 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-19 20:07:50,072 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-10-19 20:07:50,073 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-19 20:07:50,073 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-19 20:07:50,073 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-19 20:07:50,073 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2020-10-19 20:07:50,074 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2020-10-19 20:07:50,074 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2020-10-19 20:07:50,074 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-19 20:07:50,074 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-19 20:07:50,075 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2020-10-19 20:07:50,075 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-19 20:07:50,075 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2020-10-19 20:07:50,076 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-19 20:07:50,076 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-19 20:07:50,076 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2020-10-19 20:07:50,077 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-19 20:07:50,077 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-19 20:07:50,077 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-19 20:07:50,077 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2020-10-19 20:07:50,078 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2020-10-19 20:07:50,079 INFO L138 SettingsManager]: * TransformationType=MODULO_NEIGHBOR Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f63c6229f0a09709710be77b7ac5a08c2c6f5392 [2020-10-19 20:07:50,428 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-19 20:07:50,441 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-19 20:07:50,445 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-19 20:07:50,447 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-19 20:07:50,447 INFO L275 PluginConnector]: CDTParser initialized [2020-10-19 20:07:50,448 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/fibo_2calls_8-2.c [2020-10-19 20:07:50,515 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3b9fcc5db/85fcd54f300f4c67b399ab104200fb89/FLAG8700cc30b [2020-10-19 20:07:50,941 INFO L306 CDTParser]: Found 1 translation units. [2020-10-19 20:07:50,942 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_2calls_8-2.c [2020-10-19 20:07:50,951 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3b9fcc5db/85fcd54f300f4c67b399ab104200fb89/FLAG8700cc30b [2020-10-19 20:07:51,334 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3b9fcc5db/85fcd54f300f4c67b399ab104200fb89 [2020-10-19 20:07:51,340 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-19 20:07:51,350 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-19 20:07:51,352 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-19 20:07:51,352 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-19 20:07:51,356 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-19 20:07:51,357 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 08:07:51" (1/1) ... [2020-10-19 20:07:51,362 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f290273 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 08:07:51, skipping insertion in model container [2020-10-19 20:07:51,362 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 08:07:51" (1/1) ... [2020-10-19 20:07:51,372 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-19 20:07:51,393 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-19 20:07:51,666 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 20:07:51,682 INFO L203 MainTranslator]: Completed pre-run [2020-10-19 20:07:51,705 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 20:07:51,726 INFO L208 MainTranslator]: Completed translation [2020-10-19 20:07:51,727 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 08:07:51 WrapperNode [2020-10-19 20:07:51,729 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-19 20:07:51,730 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-19 20:07:51,730 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-19 20:07:51,730 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-19 20:07:51,740 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 08:07:51" (1/1) ... [2020-10-19 20:07:51,751 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 08:07:51" (1/1) ... [2020-10-19 20:07:51,843 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-19 20:07:51,844 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-19 20:07:51,844 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-19 20:07:51,845 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-19 20:07:51,855 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 08:07:51" (1/1) ... [2020-10-19 20:07:51,855 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 08:07:51" (1/1) ... [2020-10-19 20:07:51,856 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 08:07:51" (1/1) ... [2020-10-19 20:07:51,857 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 08:07:51" (1/1) ... [2020-10-19 20:07:51,861 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 08:07:51" (1/1) ... [2020-10-19 20:07:51,864 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 08:07:51" (1/1) ... [2020-10-19 20:07:51,865 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 08:07:51" (1/1) ... [2020-10-19 20:07:51,867 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-19 20:07:51,868 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-19 20:07:51,868 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-19 20:07:51,868 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-19 20:07:51,869 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 08:07:51" (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 20:07:51,937 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-19 20:07:51,937 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-10-19 20:07:51,937 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-10-19 20:07:51,937 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-19 20:07:51,937 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-10-19 20:07:51,938 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-10-19 20:07:51,938 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-19 20:07:51,938 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-19 20:07:52,167 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-19 20:07:52,167 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-19 20:07:52,169 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 08:07:52 BoogieIcfgContainer [2020-10-19 20:07:52,169 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-19 20:07:52,170 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2020-10-19 20:07:52,170 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2020-10-19 20:07:52,174 INFO L275 PluginConnector]: BuchiAutomizer initialized [2020-10-19 20:07:52,175 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-19 20:07:52,176 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 19.10 08:07:51" (1/3) ... [2020-10-19 20:07:52,177 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@487faa51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 19.10 08:07:52, skipping insertion in model container [2020-10-19 20:07:52,177 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-19 20:07:52,178 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 08:07:51" (2/3) ... [2020-10-19 20:07:52,178 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@487faa51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 19.10 08:07:52, skipping insertion in model container [2020-10-19 20:07:52,178 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-19 20:07:52,178 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 08:07:52" (3/3) ... [2020-10-19 20:07:52,180 INFO L373 chiAutomizerObserver]: Analyzing ICFG fibo_2calls_8-2.c [2020-10-19 20:07:52,239 INFO L359 BuchiCegarLoop]: Interprodecural is true [2020-10-19 20:07:52,239 INFO L360 BuchiCegarLoop]: Hoare is false [2020-10-19 20:07:52,240 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2020-10-19 20:07:52,240 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-19 20:07:52,241 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-19 20:07:52,241 INFO L364 BuchiCegarLoop]: Difference is false [2020-10-19 20:07:52,241 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-19 20:07:52,242 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2020-10-19 20:07:52,264 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 27 states. [2020-10-19 20:07:52,298 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2020-10-19 20:07:52,299 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 20:07:52,299 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 20:07:52,308 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2020-10-19 20:07:52,309 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 20:07:52,309 INFO L427 BuchiCegarLoop]: ======== Iteration 1============ [2020-10-19 20:07:52,310 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 27 states. [2020-10-19 20:07:52,314 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2020-10-19 20:07:52,314 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 20:07:52,314 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 20:07:52,315 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2020-10-19 20:07:52,315 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 20:07:52,325 INFO L794 eck$LassoCheckResult]: Stem: 26#ULTIMATE.startENTRYtrue #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(18);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 12#L-1true havoc main_#res;havoc main_#t~ret11, main_~x~0, main_~result~0;main_~x~0 := 8; 22#L39true call main_#t~ret11 := fibo1(main_~x~0);< 27#fibo1ENTRYtrue [2020-10-19 20:07:52,326 INFO L796 eck$LassoCheckResult]: Loop: 27#fibo1ENTRYtrue ~n := #in~n; 4#L10true assume !(~n < 1); 10#L12true assume !(1 == ~n); 13#L15true call #t~ret7 := fibo2(~n - 1);< 15#fibo2ENTRYtrue ~n := #in~n; 28#L20true assume !(~n < 1); 20#L22true assume !(1 == ~n); 9#L25true call #t~ret9 := fibo1(~n - 1);< 27#fibo1ENTRYtrue [2020-10-19 20:07:52,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:07:52,334 INFO L82 PathProgramCache]: Analyzing trace with hash 29898, now seen corresponding path program 1 times [2020-10-19 20:07:52,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 20:07:52,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482586821] [2020-10-19 20:07:52,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 20:07:52,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 20:07:52,472 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 20:07:52,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 20:07:52,490 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 20:07:52,514 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 20:07:52,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:07:52,517 INFO L82 PathProgramCache]: Analyzing trace with hash 1206117480, now seen corresponding path program 1 times [2020-10-19 20:07:52,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 20:07:52,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691882263] [2020-10-19 20:07:52,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 20:07:52,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 20:07:52,538 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 20:07:52,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 20:07:52,555 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 20:07:52,558 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 20:07:52,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:07:52,561 INFO L82 PathProgramCache]: Analyzing trace with hash -1276411855, now seen corresponding path program 1 times [2020-10-19 20:07:52,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 20:07:52,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709471605] [2020-10-19 20:07:52,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 20:07:52,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 20:07:52,598 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 20:07:52,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 20:07:52,632 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 20:07:52,645 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 20:07:52,847 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 20:07:52,848 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 20:07:52,848 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 20:07:52,848 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 20:07:52,849 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-19 20:07:52,849 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:07:52,849 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 20:07:52,849 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 20:07:52,849 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_8-2.c_Iteration1_Loop [2020-10-19 20:07:52,850 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 20:07:52,850 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 20:07:52,871 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:07:52,883 INFO 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 20:07:52,886 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:07:52,892 INFO 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 20:07:52,895 INFO 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 20:07:52,899 INFO 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 20:07:52,903 INFO 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 20:07:52,908 INFO 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 20:07:52,912 INFO 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 20:07:52,928 INFO 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 20:07:53,022 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 20:07:53,023 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 20:07:53,039 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:07:53,039 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:07:53,049 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 20:07:53,049 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#res=0} Honda state: {fibo2_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:07:53,094 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:07:53,094 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 20:07:53,098 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 20:07:53,098 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#res=0} Honda state: {fibo1_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 20:07:53,142 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:07:53,143 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:07:53,147 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 20:07:53,147 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#in~n=0} Honda state: {fibo2_#in~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:07:53,179 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:07:53,180 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 20:07:53,187 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 20:07:53,187 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#t~ret7=0} Honda state: {fibo1_#t~ret7=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:07:53,217 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:07:53,217 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 20:07:53,224 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 20:07:53,224 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#t~ret8=0} Honda state: {fibo1_#t~ret8=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 20:07:53,263 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:07:53,263 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:07:53,266 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 20:07:53,267 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_~n=0} Honda state: {fibo2_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:07:53,293 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:07:53,293 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 20:07:53,297 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 20:07:53,297 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_~n=0} Honda state: {fibo1_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 20:07:53,320 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:07:53,321 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:07:53,324 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 20:07:53,324 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#t~ret9=0} Honda state: {fibo2_#t~ret9=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:07:53,351 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:07:53,352 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:07:53,380 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-19 20:07:53,381 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 20:07:53,439 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-19 20:07:53,442 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 20:07:53,442 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 20:07:53,442 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 20:07:53,443 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 20:07:53,443 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-19 20:07:53,443 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:07:53,444 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 20:07:53,444 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 20:07:53,444 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_8-2.c_Iteration1_Loop [2020-10-19 20:07:53,444 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 20:07:53,444 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 20:07:53,446 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:07:53,449 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:07:53,453 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:07:53,456 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:07:53,459 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:07:53,462 INFO 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 20:07:53,465 INFO 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 20:07:53,469 INFO 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 20:07:53,472 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:07:53,484 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:07:53,566 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 20:07:53,572 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 20:07:53,586 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 20:07:53,589 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:07:53,589 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:07:53,590 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:07:53,590 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:07:53,590 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:07:53,593 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:07:53,593 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 20:07:53,598 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 20:07:53,644 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 20:07:53,647 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:07:53,647 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:07:53,647 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:07:53,647 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:07:53,647 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:07:53,649 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:07:53,649 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:07:53,655 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:07:53,698 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 20:07:53,700 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:07:53,700 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:07:53,701 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:07:53,701 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:07:53,701 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:07:53,702 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:07:53,703 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:07:53,705 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:07:53,745 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 20:07:53,747 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:07:53,747 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:07:53,748 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:07:53,748 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:07:53,748 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:07:53,749 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:07:53,749 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:07:53,752 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 20:07:53,796 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 20:07:53,799 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:07:53,799 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:07:53,800 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:07:53,800 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:07:53,800 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:07:53,801 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:07:53,801 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:07:53,804 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:07:53,841 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 20:07:53,843 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:07:53,843 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:07:53,843 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:07:53,844 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:07:53,844 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:07:53,845 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:07:53,845 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:07:53,847 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:07:53,870 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 20:07:53,871 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:07:53,871 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:07:53,871 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:07:53,872 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:07:53,872 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:07:53,874 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:07:53,874 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:07:53,875 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:07:53,899 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 20:07:53,900 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:07:53,900 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:07:53,901 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:07:53,901 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:07:53,901 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:07:53,902 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:07:53,902 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:07:53,905 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:07:53,929 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 20:07:53,930 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:07:53,930 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:07:53,931 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:07:53,931 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:07:53,931 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:07:53,933 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:07:53,933 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:07:53,936 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-19 20:07:53,951 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2020-10-19 20:07:53,951 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:07:53,963 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-19 20:07:53,964 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-19 20:07:53,964 INFO L510 LassoAnalysis]: Proved termination. [2020-10-19 20:07:53,965 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo1_#in~n) = 1*fibo1_#in~n Supporting invariants [] [2020-10-19 20:07:53,994 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-19 20:07:54,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:07:54,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:07:54,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-19 20:07:54,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:07:54,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:07:54,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-19 20:07:54,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:07:54,164 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 20:07:54,181 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 5 loop predicates [2020-10-19 20:07:54,182 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 27 states. Second operand 6 states. [2020-10-19 20:07:54,413 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 27 states.. Second operand 6 states. Result 85 states and 117 transitions. Complement of second has 24 states. [2020-10-19 20:07:54,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 1 stem states 5 non-accepting loop states 1 accepting loop states [2020-10-19 20:07:54,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-19 20:07:54,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 21 transitions. [2020-10-19 20:07:54,420 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 21 transitions. Stem has 3 letters. Loop has 8 letters. [2020-10-19 20:07:54,422 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:07:54,422 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 21 transitions. Stem has 11 letters. Loop has 8 letters. [2020-10-19 20:07:54,423 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:07:54,423 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 21 transitions. Stem has 3 letters. Loop has 16 letters. [2020-10-19 20:07:54,423 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:07:54,424 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 85 states and 117 transitions. [2020-10-19 20:07:54,433 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2020-10-19 20:07:54,445 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 85 states to 61 states and 82 transitions. [2020-10-19 20:07:54,447 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 39 [2020-10-19 20:07:54,452 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 40 [2020-10-19 20:07:54,453 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 82 transitions. [2020-10-19 20:07:54,454 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 20:07:54,454 INFO L691 BuchiCegarLoop]: Abstraction has 61 states and 82 transitions. [2020-10-19 20:07:54,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states and 82 transitions. [2020-10-19 20:07:54,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 54. [2020-10-19 20:07:54,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-19 20:07:54,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 72 transitions. [2020-10-19 20:07:54,496 INFO L714 BuchiCegarLoop]: Abstraction has 54 states and 72 transitions. [2020-10-19 20:07:54,496 INFO L594 BuchiCegarLoop]: Abstraction has 54 states and 72 transitions. [2020-10-19 20:07:54,496 INFO L427 BuchiCegarLoop]: ======== Iteration 2============ [2020-10-19 20:07:54,496 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 54 states and 72 transitions. [2020-10-19 20:07:54,498 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2020-10-19 20:07:54,498 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 20:07:54,498 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 20:07:54,500 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 20:07:54,500 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 20:07:54,501 INFO L794 eck$LassoCheckResult]: Stem: 234#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(18);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 230#L-1 havoc main_#res;havoc main_#t~ret11, main_~x~0, main_~result~0;main_~x~0 := 8; 216#L39 call main_#t~ret11 := fibo1(main_~x~0);< 222#fibo1ENTRY ~n := #in~n; 215#L10 assume !(~n < 1); 217#L12 assume !(1 == ~n); 201#L15 call #t~ret7 := fibo2(~n - 1);< 233#fibo2ENTRY ~n := #in~n; 237#L20 assume !(~n < 1); 251#L22 assume !(1 == ~n); 212#L25 call #t~ret9 := fibo1(~n - 1);< 227#fibo1ENTRY ~n := #in~n; 211#L10 assume ~n < 1;#res := 0; 213#fibo1FINAL assume true; 220#fibo1EXIT >#48#return; 221#L25-1 [2020-10-19 20:07:54,501 INFO L796 eck$LassoCheckResult]: Loop: 221#L25-1 call #t~ret10 := fibo1(~n - 2);< 226#fibo1ENTRY ~n := #in~n; 246#L10 assume !(~n < 1); 247#L12 assume !(1 == ~n); 200#L15 call #t~ret7 := fibo2(~n - 1);< 239#fibo2ENTRY ~n := #in~n; 244#L20 assume !(~n < 1); 243#L22 assume !(1 == ~n); 224#L25 call #t~ret9 := fibo1(~n - 1);< 226#fibo1ENTRY ~n := #in~n; 246#L10 assume ~n < 1;#res := 0; 225#fibo1FINAL assume true; 229#fibo1EXIT >#48#return; 221#L25-1 [2020-10-19 20:07:54,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:07:54,501 INFO L82 PathProgramCache]: Analyzing trace with hash -722660232, now seen corresponding path program 1 times [2020-10-19 20:07:54,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 20:07:54,502 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716408200] [2020-10-19 20:07:54,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 20:07:54,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:07:54,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-19 20:07:54,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:07:54,606 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 20:07:54,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716408200] [2020-10-19 20:07:54,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 20:07:54,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-19 20:07:54,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132022576] [2020-10-19 20:07:54,612 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-19 20:07:54,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:07:54,613 INFO L82 PathProgramCache]: Analyzing trace with hash -880179458, now seen corresponding path program 1 times [2020-10-19 20:07:54,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 20:07:54,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109056939] [2020-10-19 20:07:54,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 20:07:54,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:07:54,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-19 20:07:54,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:07:54,665 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-19 20:07:54,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109056939] [2020-10-19 20:07:54,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 20:07:54,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-19 20:07:54,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529600910] [2020-10-19 20:07:54,666 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-10-19 20:07:54,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 20:07:54,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-19 20:07:54,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-19 20:07:54,672 INFO L87 Difference]: Start difference. First operand 54 states and 72 transitions. cyclomatic complexity: 20 Second operand 6 states. [2020-10-19 20:07:54,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 20:07:54,755 INFO L93 Difference]: Finished difference Result 68 states and 88 transitions. [2020-10-19 20:07:54,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-19 20:07:54,757 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 68 states and 88 transitions. [2020-10-19 20:07:54,761 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2020-10-19 20:07:54,764 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 68 states to 66 states and 86 transitions. [2020-10-19 20:07:54,764 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 46 [2020-10-19 20:07:54,765 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 46 [2020-10-19 20:07:54,765 INFO L73 IsDeterministic]: Start isDeterministic. Operand 66 states and 86 transitions. [2020-10-19 20:07:54,766 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 20:07:54,766 INFO L691 BuchiCegarLoop]: Abstraction has 66 states and 86 transitions. [2020-10-19 20:07:54,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states and 86 transitions. [2020-10-19 20:07:54,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 58. [2020-10-19 20:07:54,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-19 20:07:54,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 76 transitions. [2020-10-19 20:07:54,776 INFO L714 BuchiCegarLoop]: Abstraction has 58 states and 76 transitions. [2020-10-19 20:07:54,776 INFO L594 BuchiCegarLoop]: Abstraction has 58 states and 76 transitions. [2020-10-19 20:07:54,776 INFO L427 BuchiCegarLoop]: ======== Iteration 3============ [2020-10-19 20:07:54,776 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 58 states and 76 transitions. [2020-10-19 20:07:54,778 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2020-10-19 20:07:54,779 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 20:07:54,779 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 20:07:54,780 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 20:07:54,780 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 20:07:54,781 INFO L794 eck$LassoCheckResult]: Stem: 375#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(18);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 374#L-1 havoc main_#res;havoc main_#t~ret11, main_~x~0, main_~result~0;main_~x~0 := 8; 355#L39 call main_#t~ret11 := fibo1(main_~x~0);< 364#fibo1ENTRY ~n := #in~n; 354#L10 assume !(~n < 1); 356#L12 assume !(1 == ~n); 346#L15 call #t~ret7 := fibo2(~n - 1);< 378#fibo2ENTRY ~n := #in~n; 399#L20 assume !(~n < 1); 400#L22 assume !(1 == ~n); 352#L25 call #t~ret9 := fibo1(~n - 1);< 371#fibo1ENTRY ~n := #in~n; 351#L10 assume !(~n < 1); 353#L12 assume 1 == ~n;#res := 1; 372#fibo1FINAL assume true; 365#fibo1EXIT >#48#return; 366#L25-1 [2020-10-19 20:07:54,781 INFO L796 eck$LassoCheckResult]: Loop: 366#L25-1 call #t~ret10 := fibo1(~n - 2);< 370#fibo1ENTRY ~n := #in~n; 389#L10 assume !(~n < 1); 390#L12 assume !(1 == ~n); 344#L15 call #t~ret7 := fibo2(~n - 1);< 388#fibo2ENTRY ~n := #in~n; 395#L20 assume !(~n < 1); 393#L22 assume !(1 == ~n); 368#L25 call #t~ret9 := fibo1(~n - 1);< 370#fibo1ENTRY ~n := #in~n; 389#L10 assume !(~n < 1); 390#L12 assume 1 == ~n;#res := 1; 369#fibo1FINAL assume true; 373#fibo1EXIT >#48#return; 366#L25-1 [2020-10-19 20:07:54,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:07:54,782 INFO L82 PathProgramCache]: Analyzing trace with hash -927605802, now seen corresponding path program 1 times [2020-10-19 20:07:54,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 20:07:54,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852168949] [2020-10-19 20:07:54,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 20:07:54,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:07:54,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-19 20:07:54,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:07:54,867 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 20:07:54,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852168949] [2020-10-19 20:07:54,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654021712] [2020-10-19 20:07:54,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 20:07:54,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:07:54,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-19 20:07:54,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:07:54,950 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 20:07:54,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 20:07:54,951 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-19 20:07:54,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888693963] [2020-10-19 20:07:54,952 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-19 20:07:54,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:07:54,952 INFO L82 PathProgramCache]: Analyzing trace with hash -1515734512, now seen corresponding path program 1 times [2020-10-19 20:07:54,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 20:07:54,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131229371] [2020-10-19 20:07:54,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 20:07:54,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 20:07:54,960 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 20:07:54,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 20:07:54,966 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 20:07:54,969 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 20:07:55,212 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 20:07:55,212 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 20:07:55,213 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 20:07:55,213 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 20:07:55,213 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-19 20:07:55,213 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:07:55,213 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 20:07:55,213 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 20:07:55,214 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_8-2.c_Iteration3_Loop [2020-10-19 20:07:55,214 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 20:07:55,214 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 20:07:55,216 INFO 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 20:07:55,219 INFO 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 20:07:55,222 INFO 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 20:07:55,225 INFO 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 20:07:55,227 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:07:55,235 INFO 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 20:07:55,238 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:07:55,241 INFO 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 20:07:55,244 INFO 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 20:07:55,302 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 20:07:55,302 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 20:07:55,306 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:07:55,306 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:07:55,311 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 20:07:55,311 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#t~ret7=0} Honda state: {fibo1_#t~ret7=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 20:07:55,347 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:07:55,347 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:07:55,354 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 20:07:55,354 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#t~ret8=0} Honda state: {fibo1_#t~ret8=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:07:55,386 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:07:55,386 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 20:07:55,389 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 20:07:55,389 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#in~n=0} Honda state: {fibo1_#in~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 20:07:55,414 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:07:55,414 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 [2020-10-19 20:07:55,416 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 20:07:55,417 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_~n=0} Honda state: {fibo1_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:07:55,445 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:07:55,445 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:07:55,473 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-19 20:07:55,473 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 20:07:56,050 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-19 20:07:56,052 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 20:07:56,052 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 20:07:56,052 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 20:07:56,052 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 20:07:56,053 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-19 20:07:56,053 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:07:56,053 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 20:07:56,053 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 20:07:56,053 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_8-2.c_Iteration3_Loop [2020-10-19 20:07:56,053 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 20:07:56,053 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 20:07:56,055 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:07:56,057 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:07:56,060 INFO 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 20:07:56,062 INFO 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 20:07:56,070 INFO 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 20:07:56,073 INFO 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 20:07:56,076 INFO 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 20:07:56,078 INFO 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 20:07:56,081 INFO 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 20:07:56,143 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 20:07:56,144 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 20:07:56,149 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-19 20:07:56,151 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:07:56,152 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:07:56,152 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:07:56,152 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:07:56,152 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:07:56,153 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:07:56,153 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:07:56,156 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 20:07:56,199 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 20:07:56,200 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:07:56,201 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:07:56,201 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:07:56,201 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:07:56,201 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:07:56,202 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:07:56,202 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:07:56,204 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 20:07:56,247 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 20:07:56,250 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:07:56,250 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:07:56,250 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:07:56,250 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:07:56,250 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:07:56,251 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:07:56,251 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:07:56,260 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 20:07:56,294 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 20:07:56,296 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:07:56,297 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:07:56,297 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:07:56,297 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:07:56,297 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:07:56,299 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:07:56,299 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:07:56,304 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-19 20:07:56,308 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-19 20:07:56,308 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 20:07:56,312 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-19 20:07:56,313 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-19 20:07:56,313 INFO L510 LassoAnalysis]: Proved termination. [2020-10-19 20:07:56,313 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo2_~n) = 1*fibo2_~n Supporting invariants [] Waiting until toolchain timeout for monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:07:56,348 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-19 20:07:56,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:07:56,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:07:56,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-19 20:07:56,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:07:56,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:07:56,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-19 20:07:56,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:07:56,583 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 20:07:56,584 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 8 loop predicates [2020-10-19 20:07:56,584 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 58 states and 76 transitions. cyclomatic complexity: 20 Second operand 10 states. [2020-10-19 20:07:57,104 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 58 states and 76 transitions. cyclomatic complexity: 20. Second operand 10 states. Result 191 states and 263 transitions. Complement of second has 40 states. [2020-10-19 20:07:57,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 12 states 2 stem states 9 non-accepting loop states 1 accepting loop states [2020-10-19 20:07:57,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-10-19 20:07:57,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 73 transitions. [2020-10-19 20:07:57,108 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 73 transitions. Stem has 16 letters. Loop has 14 letters. [2020-10-19 20:07:57,108 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:07:57,108 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 73 transitions. Stem has 30 letters. Loop has 14 letters. [2020-10-19 20:07:57,109 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:07:57,109 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 73 transitions. Stem has 16 letters. Loop has 28 letters. [2020-10-19 20:07:57,110 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:07:57,111 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 191 states and 263 transitions. [2020-10-19 20:07:57,118 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 20 [2020-10-19 20:07:57,124 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 191 states to 169 states and 237 transitions. [2020-10-19 20:07:57,125 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 103 [2020-10-19 20:07:57,126 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 106 [2020-10-19 20:07:57,126 INFO L73 IsDeterministic]: Start isDeterministic. Operand 169 states and 237 transitions. [2020-10-19 20:07:57,127 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 20:07:57,127 INFO L691 BuchiCegarLoop]: Abstraction has 169 states and 237 transitions. [2020-10-19 20:07:57,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states and 237 transitions. [2020-10-19 20:07:57,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 152. [2020-10-19 20:07:57,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-10-19 20:07:57,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 206 transitions. [2020-10-19 20:07:57,150 INFO L714 BuchiCegarLoop]: Abstraction has 152 states and 206 transitions. [2020-10-19 20:07:57,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 20:07:57,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-19 20:07:57,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-19 20:07:57,151 INFO L87 Difference]: Start difference. First operand 152 states and 206 transitions. Second operand 10 states. [2020-10-19 20:07:57,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 20:07:57,364 INFO L93 Difference]: Finished difference Result 183 states and 244 transitions. [2020-10-19 20:07:57,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-19 20:07:57,368 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 183 states and 244 transitions. [2020-10-19 20:07:57,378 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 20 [2020-10-19 20:07:57,389 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 183 states to 180 states and 240 transitions. [2020-10-19 20:07:57,390 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 117 [2020-10-19 20:07:57,390 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 117 [2020-10-19 20:07:57,390 INFO L73 IsDeterministic]: Start isDeterministic. Operand 180 states and 240 transitions. [2020-10-19 20:07:57,391 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 20:07:57,391 INFO L691 BuchiCegarLoop]: Abstraction has 180 states and 240 transitions. [2020-10-19 20:07:57,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states and 240 transitions. [2020-10-19 20:07:57,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 167. [2020-10-19 20:07:57,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-19 20:07:57,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 225 transitions. [2020-10-19 20:07:57,429 INFO L714 BuchiCegarLoop]: Abstraction has 167 states and 225 transitions. [2020-10-19 20:07:57,429 INFO L594 BuchiCegarLoop]: Abstraction has 167 states and 225 transitions. [2020-10-19 20:07:57,429 INFO L427 BuchiCegarLoop]: ======== Iteration 4============ [2020-10-19 20:07:57,429 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 167 states and 225 transitions. [2020-10-19 20:07:57,434 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 20 [2020-10-19 20:07:57,434 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 20:07:57,434 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 20:07:57,441 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [8, 7, 6, 6, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2020-10-19 20:07:57,442 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [6, 5, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2020-10-19 20:07:57,443 INFO L794 eck$LassoCheckResult]: Stem: 1219#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(18);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 1214#L-1 havoc main_#res;havoc main_#t~ret11, main_~x~0, main_~result~0;main_~x~0 := 8; 1192#L39 call main_#t~ret11 := fibo1(main_~x~0);< 1193#fibo1ENTRY ~n := #in~n; 1257#L10 assume !(~n < 1); 1206#L12 assume !(1 == ~n); 1159#L15 call #t~ret7 := fibo2(~n - 1);< 1216#fibo2ENTRY ~n := #in~n; 1221#L20 assume !(~n < 1); 1175#L22 assume !(1 == ~n); 1176#L25 call #t~ret9 := fibo1(~n - 1);< 1205#fibo1ENTRY ~n := #in~n; 1182#L10 assume !(~n < 1); 1184#L12 assume !(1 == ~n); 1203#L15 call #t~ret7 := fibo2(~n - 1);< 1259#fibo2ENTRY ~n := #in~n; 1261#L20 assume !(~n < 1); 1262#L22 assume !(1 == ~n); 1183#L25 call #t~ret9 := fibo1(~n - 1);< 1205#fibo1ENTRY ~n := #in~n; 1182#L10 assume !(~n < 1); 1184#L12 assume !(1 == ~n); 1203#L15 call #t~ret7 := fibo2(~n - 1);< 1259#fibo2ENTRY ~n := #in~n; 1261#L20 assume ~n < 1;#res := 0; 1260#fibo2FINAL assume true; 1258#fibo2EXIT >#52#return; 1204#L15-1 call #t~ret8 := fibo2(~n - 2);< 1223#fibo2ENTRY ~n := #in~n; 1317#L20 assume !(~n < 1); 1316#L22 assume !(1 == ~n); 1183#L25 call #t~ret9 := fibo1(~n - 1);< 1205#fibo1ENTRY ~n := #in~n; 1256#L10 assume !(~n < 1); 1263#L12 assume 1 == ~n;#res := 1; 1264#fibo1FINAL assume true; 1251#fibo1EXIT >#48#return; 1208#L25-1 call #t~ret10 := fibo1(~n - 2);< 1213#fibo1ENTRY ~n := #in~n; 1249#L10 assume !(~n < 1); 1247#L12 assume !(1 == ~n); 1212#L15 call #t~ret7 := fibo2(~n - 1);< 1246#fibo2ENTRY ~n := #in~n; 1243#L20 assume ~n < 1;#res := 0; 1244#fibo2FINAL assume true; 1248#fibo2EXIT >#52#return; 1211#L15-1 call #t~ret8 := fibo2(~n - 2);< 1246#fibo2ENTRY ~n := #in~n; 1243#L20 assume !(~n < 1); 1239#L22 assume 1 == ~n;#res := 1; 1240#fibo2FINAL assume true; 1308#fibo2EXIT >#54#return; 1307#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 1319#fibo1FINAL assume true; 1318#fibo1EXIT >#50#return; 1188#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret10;havoc #t~ret9; 1311#fibo2FINAL assume true; 1309#fibo2EXIT >#54#return; 1307#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 1319#fibo1FINAL assume true; 1318#fibo1EXIT >#48#return; 1186#L25-1 call #t~ret10 := fibo1(~n - 2);< 1300#fibo1ENTRY ~n := #in~n; 1298#L10 assume !(~n < 1); 1296#L12 assume !(1 == ~n); 1170#L15 call #t~ret7 := fibo2(~n - 1);< 1215#fibo2ENTRY ~n := #in~n; 1220#L20 assume ~n < 1;#res := 0; 1173#fibo2FINAL assume true; 1310#fibo2EXIT >#52#return; 1172#L15-1 call #t~ret8 := fibo2(~n - 2);< 1215#fibo2ENTRY ~n := #in~n; 1220#L20 assume ~n < 1;#res := 0; 1173#fibo2FINAL assume true; 1310#fibo2EXIT >#54#return; 1307#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 1319#fibo1FINAL assume true; 1318#fibo1EXIT >#50#return; 1188#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret10;havoc #t~ret9; 1311#fibo2FINAL assume true; 1309#fibo2EXIT >#52#return; 1172#L15-1 [2020-10-19 20:07:57,443 INFO L796 eck$LassoCheckResult]: Loop: 1172#L15-1 call #t~ret8 := fibo2(~n - 2);< 1215#fibo2ENTRY ~n := #in~n; 1220#L20 assume !(~n < 1); 1169#L22 assume !(1 == ~n); 1174#L25 call #t~ret9 := fibo1(~n - 1);< 1300#fibo1ENTRY ~n := #in~n; 1298#L10 assume !(~n < 1); 1296#L12 assume !(1 == ~n); 1170#L15 call #t~ret7 := fibo2(~n - 1);< 1215#fibo2ENTRY ~n := #in~n; 1220#L20 assume !(~n < 1); 1169#L22 assume !(1 == ~n); 1174#L25 call #t~ret9 := fibo1(~n - 1);< 1300#fibo1ENTRY ~n := #in~n; 1298#L10 assume !(~n < 1); 1296#L12 assume !(1 == ~n); 1170#L15 call #t~ret7 := fibo2(~n - 1);< 1215#fibo2ENTRY ~n := #in~n; 1220#L20 assume ~n < 1;#res := 0; 1173#fibo2FINAL assume true; 1310#fibo2EXIT >#52#return; 1172#L15-1 call #t~ret8 := fibo2(~n - 2);< 1215#fibo2ENTRY ~n := #in~n; 1220#L20 assume ~n < 1;#res := 0; 1173#fibo2FINAL assume true; 1310#fibo2EXIT >#54#return; 1307#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 1319#fibo1FINAL assume true; 1318#fibo1EXIT >#48#return; 1186#L25-1 call #t~ret10 := fibo1(~n - 2);< 1300#fibo1ENTRY ~n := #in~n; 1298#L10 assume !(~n < 1); 1296#L12 assume !(1 == ~n); 1170#L15 call #t~ret7 := fibo2(~n - 1);< 1215#fibo2ENTRY ~n := #in~n; 1220#L20 assume ~n < 1;#res := 0; 1173#fibo2FINAL assume true; 1310#fibo2EXIT >#52#return; 1172#L15-1 call #t~ret8 := fibo2(~n - 2);< 1215#fibo2ENTRY ~n := #in~n; 1220#L20 assume ~n < 1;#res := 0; 1173#fibo2FINAL assume true; 1310#fibo2EXIT >#54#return; 1307#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 1319#fibo1FINAL assume true; 1318#fibo1EXIT >#50#return; 1188#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret10;havoc #t~ret9; 1311#fibo2FINAL assume true; 1309#fibo2EXIT >#52#return; 1172#L15-1 [2020-10-19 20:07:57,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:07:57,443 INFO L82 PathProgramCache]: Analyzing trace with hash -1380034771, now seen corresponding path program 1 times [2020-10-19 20:07:57,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 20:07:57,444 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618325752] [2020-10-19 20:07:57,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 20:07:57,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:07:57,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-19 20:07:57,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:07:57,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-19 20:07:57,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:07:57,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-19 20:07:57,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:07:57,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-19 20:07:57,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:07:57,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-19 20:07:57,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:07:57,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-19 20:07:57,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:07:57,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-19 20:07:57,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:07:57,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-19 20:07:57,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:07:57,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-10-19 20:07:57,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:07:57,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-19 20:07:57,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:07:57,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-19 20:07:57,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:07:57,679 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 25 proven. 25 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2020-10-19 20:07:57,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618325752] [2020-10-19 20:07:57,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669676927] [2020-10-19 20:07:57,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 20:07:57,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:07:57,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-19 20:07:57,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:07:57,887 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 17 proven. 91 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2020-10-19 20:07:57,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 20:07:57,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 13] total 17 [2020-10-19 20:07:57,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12939491] [2020-10-19 20:07:57,889 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-19 20:07:57,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:07:57,890 INFO L82 PathProgramCache]: Analyzing trace with hash -1411437133, now seen corresponding path program 1 times [2020-10-19 20:07:57,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 20:07:57,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104289617] [2020-10-19 20:07:57,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 20:07:57,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:07:57,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-19 20:07:57,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:07:57,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-19 20:07:57,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:07:57,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-19 20:07:57,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:07:57,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-19 20:07:57,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:07:57,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-19 20:07:57,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:07:57,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-19 20:07:57,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:07:57,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-19 20:07:57,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:07:57,970 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 13 proven. 15 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-10-19 20:07:57,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104289617] [2020-10-19 20:07:57,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764444785] [2020-10-19 20:07:57,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 20:07:58,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:07:58,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-19 20:07:58,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:07:58,093 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 18 proven. 16 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-19 20:07:58,094 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 20:07:58,094 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9] total 12 [2020-10-19 20:07:58,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573098304] [2020-10-19 20:07:58,095 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-10-19 20:07:58,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 20:07:58,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-19 20:07:58,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-19 20:07:58,096 INFO L87 Difference]: Start difference. First operand 167 states and 225 transitions. cyclomatic complexity: 63 Second operand 12 states. [2020-10-19 20:07:58,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 20:07:58,436 INFO L93 Difference]: Finished difference Result 223 states and 293 transitions. [2020-10-19 20:07:58,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-19 20:07:58,438 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 223 states and 293 transitions. [2020-10-19 20:07:58,448 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 20 [2020-10-19 20:07:58,460 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 223 states to 200 states and 262 transitions. [2020-10-19 20:07:58,460 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 134 [2020-10-19 20:07:58,461 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 134 [2020-10-19 20:07:58,461 INFO L73 IsDeterministic]: Start isDeterministic. Operand 200 states and 262 transitions. [2020-10-19 20:07:58,462 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 20:07:58,464 INFO L691 BuchiCegarLoop]: Abstraction has 200 states and 262 transitions. [2020-10-19 20:07:58,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states and 262 transitions. [2020-10-19 20:07:58,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 184. [2020-10-19 20:07:58,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-10-19 20:07:58,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 238 transitions. [2020-10-19 20:07:58,494 INFO L714 BuchiCegarLoop]: Abstraction has 184 states and 238 transitions. [2020-10-19 20:07:58,495 INFO L594 BuchiCegarLoop]: Abstraction has 184 states and 238 transitions. [2020-10-19 20:07:58,495 INFO L427 BuchiCegarLoop]: ======== Iteration 5============ [2020-10-19 20:07:58,495 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 184 states and 238 transitions. [2020-10-19 20:07:58,501 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 20 [2020-10-19 20:07:58,501 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 20:07:58,501 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 20:07:58,506 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 20:07:58,506 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 20:07:58,506 INFO L794 eck$LassoCheckResult]: Stem: 2329#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(18);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 2319#L-1 havoc main_#res;havoc main_#t~ret11, main_~x~0, main_~result~0;main_~x~0 := 8; 2301#L39 call main_#t~ret11 := fibo1(main_~x~0);< 2302#fibo1ENTRY ~n := #in~n; 2364#L10 assume !(~n < 1); 2318#L12 assume !(1 == ~n); 2282#L15 call #t~ret7 := fibo2(~n - 1);< 2322#fibo2ENTRY ~n := #in~n; 2413#L20 assume !(~n < 1); 2281#L22 assume !(1 == ~n); 2283#L25 call #t~ret9 := fibo1(~n - 1);< 2311#fibo1ENTRY ~n := #in~n; 2350#L10 assume !(~n < 1); 2348#L12 assume !(1 == ~n); 2265#L15 call #t~ret7 := fibo2(~n - 1);< 2344#fibo2ENTRY ~n := #in~n; 2367#L20 assume !(~n < 1); 2366#L22 assume !(1 == ~n); 2336#L25 call #t~ret9 := fibo1(~n - 1);< 2311#fibo1ENTRY ~n := #in~n; 2353#L10 assume !(~n < 1); 2377#L12 assume 1 == ~n;#res := 1; 2378#fibo1FINAL assume true; 2444#fibo1EXIT >#48#return; 2291#L25-1 call #t~ret10 := fibo1(~n - 2);< 2314#fibo1ENTRY ~n := #in~n; 2290#L10 assume ~n < 1;#res := 0; 2292#fibo1FINAL assume true; 2447#fibo1EXIT >#50#return; 2264#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret10;havoc #t~ret9; 2267#fibo2FINAL assume true; 2387#fibo2EXIT >#52#return; 2286#L15-1 [2020-10-19 20:07:58,506 INFO L796 eck$LassoCheckResult]: Loop: 2286#L15-1 call #t~ret8 := fibo2(~n - 2);< 2335#fibo2ENTRY ~n := #in~n; 2414#L20 assume !(~n < 1); 2415#L22 assume !(1 == ~n); 2394#L25 call #t~ret9 := fibo1(~n - 1);< 2403#fibo1ENTRY ~n := #in~n; 2408#L10 assume !(~n < 1); 2406#L12 assume !(1 == ~n); 2287#L15 call #t~ret7 := fibo2(~n - 1);< 2335#fibo2ENTRY ~n := #in~n; 2414#L20 assume !(~n < 1); 2415#L22 assume 1 == ~n;#res := 1; 2284#fibo2FINAL assume true; 2288#fibo2EXIT >#52#return; 2286#L15-1 [2020-10-19 20:07:58,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:07:58,507 INFO L82 PathProgramCache]: Analyzing trace with hash -658151768, now seen corresponding path program 1 times [2020-10-19 20:07:58,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 20:07:58,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782440206] [2020-10-19 20:07:58,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 20:07:58,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:07:58,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-19 20:07:58,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:07:58,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-19 20:07:58,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:07:58,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-19 20:07:58,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:07:58,730 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-19 20:07:58,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782440206] [2020-10-19 20:07:58,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589112679] [2020-10-19 20:07:58,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 20:07:58,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:07:58,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-19 20:07:58,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:07:58,854 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-19 20:07:58,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 20:07:58,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2020-10-19 20:07:58,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705249136] [2020-10-19 20:07:58,855 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-19 20:07:58,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:07:58,856 INFO L82 PathProgramCache]: Analyzing trace with hash -815837104, now seen corresponding path program 1 times [2020-10-19 20:07:58,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 20:07:58,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825057123] [2020-10-19 20:07:58,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 20:07:58,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 20:07:58,860 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 20:07:58,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 20:07:58,863 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 20:07:58,865 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 20:07:59,043 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 20:07:59,043 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 20:07:59,044 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 20:07:59,044 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 20:07:59,044 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-19 20:07:59,044 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:07:59,044 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 20:07:59,044 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 20:07:59,044 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_8-2.c_Iteration5_Loop [2020-10-19 20:07:59,044 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 20:07:59,045 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 20:07:59,046 INFO 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 20:07:59,048 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:07:59,051 INFO 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 20:07:59,054 INFO 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 20:07:59,056 INFO 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 20:07:59,059 INFO 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 20:07:59,067 INFO 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 20:07:59,069 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 20:07:59,071 INFO 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 20:07:59,129 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 20:07:59,129 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 20:07:59,133 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:07:59,133 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:07:59,136 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 20:07:59,136 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#t~ret9=0} Honda state: {fibo2_#t~ret9=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 20:07:59,175 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:07:59,175 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:07:59,178 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 20:07:59,179 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#in~n=0} Honda state: {fibo2_#in~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 20:07:59,217 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:07:59,217 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 39 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:07:59,221 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 20:07:59,221 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#t~ret7=1} Honda state: {fibo1_#t~ret7=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 20:07:59,259 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:07:59,259 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 40 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:07:59,263 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 20:07:59,263 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#res=0} Honda state: {fibo1_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 20:07:59,310 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:07:59,310 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 41 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:07:59,313 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 20:07:59,314 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#res=0} Honda state: {fibo2_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 20:07:59,353 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:07:59,353 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 42 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 20:07:59,395 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-19 20:07:59,395 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 43 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:00,014 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-19 20:08:00,016 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 20:08:00,016 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 20:08:00,016 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 20:08:00,017 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 20:08:00,017 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-19 20:08:00,017 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:00,017 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 20:08:00,017 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 20:08:00,017 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_8-2.c_Iteration5_Loop [2020-10-19 20:08:00,017 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 20:08:00,017 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 20:08:00,018 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 20:08:00,020 INFO 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 20:08:00,021 INFO 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 20:08:00,026 INFO 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 20:08:00,027 INFO 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 20:08:00,031 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:08:00,032 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 20:08:00,034 INFO 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 20:08:00,042 INFO 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 20:08:00,097 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 20:08:00,097 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:00,100 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 20:08:00,102 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:08:00,102 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:08:00,102 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:08:00,102 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:08:00,102 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:08:00,103 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:08:00,103 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:08:00,104 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:00,128 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 20:08:00,129 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:08:00,130 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:08:00,130 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:08:00,130 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:08:00,130 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:08:00,130 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:08:00,130 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:08:00,132 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:00,154 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 20:08:00,155 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:08:00,155 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:08:00,156 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:08:00,156 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:08:00,156 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:08:00,156 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:08:00,156 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:08:00,158 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:00,181 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 20:08:00,182 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:08:00,183 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:08:00,183 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:08:00,183 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:08:00,183 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:08:00,183 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:08:00,184 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:08:00,185 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:00,208 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 20:08:00,210 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:08:00,210 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:08:00,210 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:08:00,210 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:08:00,210 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:08:00,211 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:08:00,211 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:08:00,213 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 20:08:00,234 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 20:08:00,236 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:08:00,236 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:08:00,236 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:08:00,236 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:08:00,236 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:08:00,237 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:08:00,237 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:08:00,238 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 20:08:00,262 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 20:08:00,264 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:08:00,264 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:08:00,264 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:08:00,264 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:08:00,264 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:08:00,265 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:08:00,265 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:08:00,266 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:00,291 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 20:08:00,295 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:08:00,295 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:08:00,295 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:08:00,295 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:08:00,296 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:08:00,297 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:08:00,297 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:08:00,301 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-19 20:08:00,305 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-19 20:08:00,305 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:00,308 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-19 20:08:00,308 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-19 20:08:00,308 INFO L510 LassoAnalysis]: Proved termination. [2020-10-19 20:08:00,308 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo1_~n) = 1*fibo1_~n Supporting invariants [] [2020-10-19 20:08:00,337 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-19 20:08:00,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:08:00,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:00,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-19 20:08:00,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:00,417 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:08:00,423 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:08:00,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:00,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-19 20:08:00,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:00,532 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 20:08:00,533 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 8 loop predicates [2020-10-19 20:08:00,533 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 184 states and 238 transitions. cyclomatic complexity: 59 Second operand 10 states. [2020-10-19 20:08:01,002 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 184 states and 238 transitions. cyclomatic complexity: 59. Second operand 10 states. Result 717 states and 936 transitions. Complement of second has 40 states. [2020-10-19 20:08:01,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 12 states 2 stem states 9 non-accepting loop states 1 accepting loop states [2020-10-19 20:08:01,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-10-19 20:08:01,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 69 transitions. [2020-10-19 20:08:01,009 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 69 transitions. Stem has 32 letters. Loop has 14 letters. [2020-10-19 20:08:01,010 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:08:01,010 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 69 transitions. Stem has 46 letters. Loop has 14 letters. [2020-10-19 20:08:01,011 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:08:01,011 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 69 transitions. Stem has 32 letters. Loop has 28 letters. [2020-10-19 20:08:01,012 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:08:01,013 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 717 states and 936 transitions. [2020-10-19 20:08:01,024 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 40 [2020-10-19 20:08:01,035 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 717 states to 646 states and 859 transitions. [2020-10-19 20:08:01,036 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 301 [2020-10-19 20:08:01,037 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 308 [2020-10-19 20:08:01,037 INFO L73 IsDeterministic]: Start isDeterministic. Operand 646 states and 859 transitions. [2020-10-19 20:08:01,038 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 20:08:01,038 INFO L691 BuchiCegarLoop]: Abstraction has 646 states and 859 transitions. [2020-10-19 20:08:01,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states and 859 transitions. [2020-10-19 20:08:01,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 625. [2020-10-19 20:08:01,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 625 states. [2020-10-19 20:08:01,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 829 transitions. [2020-10-19 20:08:01,071 INFO L714 BuchiCegarLoop]: Abstraction has 625 states and 829 transitions. [2020-10-19 20:08:01,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 20:08:01,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-19 20:08:01,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2020-10-19 20:08:01,074 INFO L87 Difference]: Start difference. First operand 625 states and 829 transitions. Second operand 15 states. [2020-10-19 20:08:01,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 20:08:01,408 INFO L93 Difference]: Finished difference Result 677 states and 901 transitions. [2020-10-19 20:08:01,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-19 20:08:01,409 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 677 states and 901 transitions. [2020-10-19 20:08:01,420 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 40 [2020-10-19 20:08:01,430 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 677 states to 674 states and 897 transitions. [2020-10-19 20:08:01,430 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 322 [2020-10-19 20:08:01,431 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 322 [2020-10-19 20:08:01,431 INFO L73 IsDeterministic]: Start isDeterministic. Operand 674 states and 897 transitions. [2020-10-19 20:08:01,432 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 20:08:01,432 INFO L691 BuchiCegarLoop]: Abstraction has 674 states and 897 transitions. [2020-10-19 20:08:01,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states and 897 transitions. [2020-10-19 20:08:01,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 635. [2020-10-19 20:08:01,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 635 states. [2020-10-19 20:08:01,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 838 transitions. [2020-10-19 20:08:01,460 INFO L714 BuchiCegarLoop]: Abstraction has 635 states and 838 transitions. [2020-10-19 20:08:01,460 INFO L594 BuchiCegarLoop]: Abstraction has 635 states and 838 transitions. [2020-10-19 20:08:01,460 INFO L427 BuchiCegarLoop]: ======== Iteration 6============ [2020-10-19 20:08:01,461 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 635 states and 838 transitions. [2020-10-19 20:08:01,466 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 40 [2020-10-19 20:08:01,466 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 20:08:01,467 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 20:08:01,468 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 20:08:01,468 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 20:08:01,468 INFO L794 eck$LassoCheckResult]: Stem: 4883#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(18);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 4882#L-1 havoc main_#res;havoc main_#t~ret11, main_~x~0, main_~result~0;main_~x~0 := 8; 4854#L39 call main_#t~ret11 := fibo1(main_~x~0);< 4855#fibo1ENTRY ~n := #in~n; 5175#L10 assume !(~n < 1); 5174#L12 assume !(1 == ~n); 4899#L15 call #t~ret7 := fibo2(~n - 1);< 5170#fibo2ENTRY ~n := #in~n; 5159#L20 assume !(~n < 1); 5157#L22 assume !(1 == ~n); 5144#L25 call #t~ret9 := fibo1(~n - 1);< 5154#fibo1ENTRY ~n := #in~n; 5152#L10 assume !(~n < 1); 5149#L12 assume !(1 == ~n); 4924#L15 call #t~ret7 := fibo2(~n - 1);< 5015#fibo2ENTRY ~n := #in~n; 5138#L20 assume !(~n < 1); 5066#L22 assume !(1 == ~n); 4862#L25 call #t~ret9 := fibo1(~n - 1);< 5032#fibo1ENTRY ~n := #in~n; 5033#L10 assume !(~n < 1); 5118#L12 assume !(1 == ~n); 4999#L15 call #t~ret7 := fibo2(~n - 1);< 5004#fibo2ENTRY ~n := #in~n; 4998#L20 assume !(~n < 1); 5000#L22 assume 1 == ~n;#res := 1; 5369#fibo2FINAL assume true; 5367#fibo2EXIT >#52#return; 4985#L15-1 call #t~ret8 := fibo2(~n - 2);< 4995#fibo2ENTRY ~n := #in~n; 4990#L20 assume ~n < 1;#res := 0; 4984#fibo2FINAL assume true; 4986#fibo2EXIT >#54#return; 4978#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 4979#fibo1FINAL assume true; 4943#fibo1EXIT >#48#return; 4915#L25-1 call #t~ret10 := fibo1(~n - 2);< 4926#fibo1ENTRY ~n := #in~n; 5451#L10 assume ~n < 1;#res := 0; 5450#fibo1FINAL assume true; 5446#fibo1EXIT >#50#return; 5432#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret10;havoc #t~ret9; 5428#fibo2FINAL assume true; 5426#fibo2EXIT >#52#return; 4868#L15-1 call #t~ret8 := fibo2(~n - 2);< 4889#fibo2ENTRY [2020-10-19 20:08:01,469 INFO L796 eck$LassoCheckResult]: Loop: 4889#fibo2ENTRY ~n := #in~n; 4948#L20 assume !(~n < 1); 4904#L22 assume !(1 == ~n); 4867#L25 call #t~ret9 := fibo1(~n - 1);< 4872#fibo1ENTRY ~n := #in~n; 5385#L10 assume !(~n < 1); 5383#L12 assume !(1 == ~n); 4870#L15 call #t~ret7 := fibo2(~n - 1);< 4889#fibo2ENTRY [2020-10-19 20:08:01,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:08:01,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1560322136, now seen corresponding path program 1 times [2020-10-19 20:08:01,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 20:08:01,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976507557] [2020-10-19 20:08:01,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 20:08:01,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:01,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-19 20:08:01,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:01,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-19 20:08:01,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:01,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-19 20:08:01,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:01,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-19 20:08:01,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:01,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-19 20:08:01,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:01,550 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-19 20:08:01,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976507557] [2020-10-19 20:08:01,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012094527] [2020-10-19 20:08:01,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 20:08:01,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:01,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-19 20:08:01,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:01,765 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 3 proven. 34 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-19 20:08:01,765 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 20:08:01,766 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 14] total 19 [2020-10-19 20:08:01,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250714566] [2020-10-19 20:08:01,766 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-19 20:08:01,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:08:01,767 INFO L82 PathProgramCache]: Analyzing trace with hash 996300776, now seen corresponding path program 2 times [2020-10-19 20:08:01,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 20:08:01,767 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823163360] [2020-10-19 20:08:01,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 20:08:01,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 20:08:01,773 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 20:08:01,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 20:08:01,774 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 20:08:01,775 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 20:08:01,869 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 20:08:01,870 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 20:08:01,870 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 20:08:01,870 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 20:08:01,870 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-19 20:08:01,870 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:01,870 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 20:08:01,870 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 20:08:01,870 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_8-2.c_Iteration6_Loop [2020-10-19 20:08:01,870 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 20:08:01,870 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 20:08:01,872 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:08:01,876 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:08:01,879 INFO 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 20:08:01,881 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:08:01,883 INFO 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 20:08:01,885 INFO 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 20:08:01,887 INFO 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 20:08:01,889 INFO 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 20:08:01,904 INFO 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 20:08:01,912 INFO 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 20:08:01,974 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 20:08:01,974 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:01,978 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:08:01,979 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 20:08:01,981 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 20:08:01,981 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#t~ret8=0} Honda state: {fibo1_#t~ret8=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:02,004 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:08:02,005 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 20:08:02,007 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 20:08:02,007 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#in~n=0} Honda state: {fibo1_#in~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:02,030 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:08:02,030 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 20:08:02,033 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 20:08:02,033 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#res=0} Honda state: {fibo2_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:02,057 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:08:02,058 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 20:08:02,061 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 20:08:02,061 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_~n=0} Honda state: {fibo1_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:02,084 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:08:02,084 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 20:08:02,086 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 20:08:02,087 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_~n=0} Honda state: {fibo2_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:02,112 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:08:02,112 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 20:08:02,115 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 20:08:02,115 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#res=0} Honda state: {fibo1_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:02,139 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:08:02,139 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 20:08:02,141 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 20:08:02,142 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#t~ret10=0} Honda state: {fibo2_#t~ret10=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:02,164 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:08:02,164 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 20:08:02,166 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 20:08:02,167 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#t~ret9=0} Honda state: {fibo2_#t~ret9=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:02,190 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:08:02,190 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 20:08:02,223 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-19 20:08:02,223 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 63 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:02,278 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-19 20:08:02,280 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 20:08:02,280 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 20:08:02,280 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 20:08:02,280 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 20:08:02,281 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-19 20:08:02,281 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:02,281 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 20:08:02,281 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 20:08:02,281 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_8-2.c_Iteration6_Loop [2020-10-19 20:08:02,282 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 20:08:02,282 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 20:08:02,283 INFO 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 20:08:02,284 INFO 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 20:08:02,286 INFO 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 20:08:02,289 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 20:08:02,290 INFO 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 20:08:02,293 INFO 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 20:08:02,297 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:08:02,298 INFO 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 20:08:02,300 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:08:02,302 INFO 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 20:08:02,362 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 20:08:02,363 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:02,368 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 20:08:02,369 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:08:02,370 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:08:02,370 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:08:02,370 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:08:02,370 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:08:02,371 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:08:02,371 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:08:02,372 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:02,395 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 20:08:02,397 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:08:02,397 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:08:02,398 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:08:02,398 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:08:02,398 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:08:02,399 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:08:02,399 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:08:02,401 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:02,425 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 20:08:02,427 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:08:02,427 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:08:02,428 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:08:02,428 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:08:02,428 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:08:02,429 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:08:02,429 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:08:02,433 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 20:08:02,456 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 20:08:02,458 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:08:02,459 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:08:02,459 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:08:02,459 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:08:02,459 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:08:02,460 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:08:02,460 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 67 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:02,462 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:02,484 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-19 20:08:02,486 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:08:02,486 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:08:02,486 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:08:02,486 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:08:02,486 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:08:02,490 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:08:02,490 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:08:02,492 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 20:08:02,540 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-19 20:08:02,542 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:08:02,542 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:08:02,542 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:08:02,542 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:08:02,543 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:08:02,545 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:08:02,545 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 69 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:02,547 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:02,575 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 20:08:02,576 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:08:02,576 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:08:02,576 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:08:02,576 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:08:02,576 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:08:02,577 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:08:02,577 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:08:02,578 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:02,603 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 20:08:02,605 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:08:02,605 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:08:02,605 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:08:02,605 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:08:02,605 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:08:02,606 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:08:02,606 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:08:02,610 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:02,635 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 20:08:02,637 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:08:02,637 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:08:02,637 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:08:02,637 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:08:02,637 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:08:02,637 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:08:02,638 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:08:02,639 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:02,663 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 20:08:02,664 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:08:02,664 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:08:02,664 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:08:02,664 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:08:02,664 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:08:02,665 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:08:02,665 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:08:02,667 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-19 20:08:02,668 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2020-10-19 20:08:02,669 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 20:08:02,672 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-19 20:08:02,673 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-19 20:08:02,673 INFO L510 LassoAnalysis]: Proved termination. [2020-10-19 20:08:02,673 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo2_#in~n) = 1*fibo2_#in~n Supporting invariants [] Waiting until toolchain timeout for monitored process 74 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:02,695 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-19 20:08:02,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:08:02,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:02,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-19 20:08:02,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:02,780 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:08:02,783 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:08:02,789 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:08:02,798 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:08:02,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:02,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-19 20:08:02,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:02,879 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 20:08:02,879 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 5 loop predicates [2020-10-19 20:08:02,879 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 635 states and 838 transitions. cyclomatic complexity: 220 Second operand 7 states. [2020-10-19 20:08:03,065 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 635 states and 838 transitions. cyclomatic complexity: 220. Second operand 7 states. Result 947 states and 1222 transitions. Complement of second has 24 states. [2020-10-19 20:08:03,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 8 states 2 stem states 5 non-accepting loop states 1 accepting loop states [2020-10-19 20:08:03,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-19 20:08:03,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 39 transitions. [2020-10-19 20:08:03,067 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 39 transitions. Stem has 45 letters. Loop has 8 letters. [2020-10-19 20:08:03,068 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:08:03,069 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-19 20:08:03,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:08:03,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:03,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-19 20:08:03,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:03,169 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:08:03,180 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:08:03,186 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:08:03,192 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:08:03,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:03,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-19 20:08:03,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:03,259 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 20:08:03,260 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 5 loop predicates [2020-10-19 20:08:03,260 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 635 states and 838 transitions. cyclomatic complexity: 220 Second operand 7 states. [2020-10-19 20:08:03,424 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 635 states and 838 transitions. cyclomatic complexity: 220. Second operand 7 states. Result 947 states and 1222 transitions. Complement of second has 24 states. [2020-10-19 20:08:03,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 8 states 2 stem states 5 non-accepting loop states 1 accepting loop states [2020-10-19 20:08:03,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-19 20:08:03,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 39 transitions. [2020-10-19 20:08:03,426 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 39 transitions. Stem has 45 letters. Loop has 8 letters. [2020-10-19 20:08:03,426 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:08:03,426 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-19 20:08:03,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:08:03,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:03,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-19 20:08:03,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:03,513 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:08:03,516 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:08:03,518 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:08:03,520 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:08:03,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:03,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-19 20:08:03,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:03,578 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 20:08:03,579 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 5 loop predicates [2020-10-19 20:08:03,579 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 635 states and 838 transitions. cyclomatic complexity: 220 Second operand 7 states. [2020-10-19 20:08:03,800 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 635 states and 838 transitions. cyclomatic complexity: 220. Second operand 7 states. Result 1303 states and 1629 transitions. Complement of second has 23 states. [2020-10-19 20:08:03,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 8 states 2 stem states 5 non-accepting loop states 1 accepting loop states [2020-10-19 20:08:03,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-19 20:08:03,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 43 transitions. [2020-10-19 20:08:03,803 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 43 transitions. Stem has 45 letters. Loop has 8 letters. [2020-10-19 20:08:03,804 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:08:03,804 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 43 transitions. Stem has 53 letters. Loop has 8 letters. [2020-10-19 20:08:03,805 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:08:03,805 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 43 transitions. Stem has 45 letters. Loop has 16 letters. [2020-10-19 20:08:03,808 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:08:03,808 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1303 states and 1629 transitions. [2020-10-19 20:08:03,829 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 88 [2020-10-19 20:08:03,845 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1303 states to 988 states and 1292 transitions. [2020-10-19 20:08:03,846 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 381 [2020-10-19 20:08:03,847 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 427 [2020-10-19 20:08:03,848 INFO L73 IsDeterministic]: Start isDeterministic. Operand 988 states and 1292 transitions. [2020-10-19 20:08:03,851 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 20:08:03,851 INFO L691 BuchiCegarLoop]: Abstraction has 988 states and 1292 transitions. [2020-10-19 20:08:03,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 988 states and 1292 transitions. [2020-10-19 20:08:03,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 988 to 899. [2020-10-19 20:08:03,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 899 states. [2020-10-19 20:08:03,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 1160 transitions. [2020-10-19 20:08:03,886 INFO L714 BuchiCegarLoop]: Abstraction has 899 states and 1160 transitions. [2020-10-19 20:08:03,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 20:08:03,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-19 20:08:03,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2020-10-19 20:08:03,891 INFO L87 Difference]: Start difference. First operand 899 states and 1160 transitions. Second operand 19 states. [2020-10-19 20:08:04,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 20:08:04,569 INFO L93 Difference]: Finished difference Result 1253 states and 1799 transitions. [2020-10-19 20:08:04,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-19 20:08:04,569 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1253 states and 1799 transitions. [2020-10-19 20:08:04,587 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 104 [2020-10-19 20:08:04,608 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1253 states to 1247 states and 1793 transitions. [2020-10-19 20:08:04,609 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 546 [2020-10-19 20:08:04,610 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 546 [2020-10-19 20:08:04,610 INFO L73 IsDeterministic]: Start isDeterministic. Operand 1247 states and 1793 transitions. [2020-10-19 20:08:04,612 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 20:08:04,612 INFO L691 BuchiCegarLoop]: Abstraction has 1247 states and 1793 transitions. [2020-10-19 20:08:04,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1247 states and 1793 transitions. [2020-10-19 20:08:04,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1247 to 1103. [2020-10-19 20:08:04,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1103 states. [2020-10-19 20:08:04,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1103 states to 1103 states and 1503 transitions. [2020-10-19 20:08:04,658 INFO L714 BuchiCegarLoop]: Abstraction has 1103 states and 1503 transitions. [2020-10-19 20:08:04,658 INFO L594 BuchiCegarLoop]: Abstraction has 1103 states and 1503 transitions. [2020-10-19 20:08:04,658 INFO L427 BuchiCegarLoop]: ======== Iteration 7============ [2020-10-19 20:08:04,658 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 1103 states and 1503 transitions. [2020-10-19 20:08:04,667 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 101 [2020-10-19 20:08:04,667 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 20:08:04,668 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 20:08:04,669 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 20:08:04,669 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 20:08:04,670 INFO L794 eck$LassoCheckResult]: Stem: 11730#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(18);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 11729#L-1 havoc main_#res;havoc main_#t~ret11, main_~x~0, main_~result~0;main_~x~0 := 8; 11692#L39 call main_#t~ret11 := fibo1(main_~x~0);< 11693#fibo1ENTRY ~n := #in~n; 11814#L10 assume !(~n < 1); 11813#L12 assume !(1 == ~n); 11809#L15 call #t~ret7 := fibo2(~n - 1);< 11812#fibo2ENTRY ~n := #in~n; 11811#L20 assume !(~n < 1); 11810#L22 assume !(1 == ~n); 11805#L25 call #t~ret9 := fibo1(~n - 1);< 11808#fibo1ENTRY ~n := #in~n; 11807#L10 assume !(~n < 1); 11806#L12 assume !(1 == ~n); 11784#L15 call #t~ret7 := fibo2(~n - 1);< 11786#fibo2ENTRY ~n := #in~n; 11804#L20 assume !(~n < 1); 11800#L22 assume !(1 == ~n); 11781#L25 call #t~ret9 := fibo1(~n - 1);< 11794#fibo1ENTRY ~n := #in~n; 11795#L10 assume !(~n < 1); 11802#L12 assume !(1 == ~n); 11803#L15 call #t~ret7 := fibo2(~n - 1);< 12322#fibo2ENTRY ~n := #in~n; 12330#L20 assume !(~n < 1); 12327#L22 assume 1 == ~n;#res := 1; 12326#fibo2FINAL assume true; 12321#fibo2EXIT >#52#return; 12316#L15-1 call #t~ret8 := fibo2(~n - 2);< 12317#fibo2ENTRY ~n := #in~n; 12343#L20 assume ~n < 1;#res := 0; 12342#fibo2FINAL assume true; 12315#fibo2EXIT >#54#return; 12310#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 12307#fibo1FINAL assume true; 12304#fibo1EXIT >#48#return; 12290#L25-1 call #t~ret10 := fibo1(~n - 2);< 12294#fibo1ENTRY ~n := #in~n; 12295#L10 assume !(~n < 1); 12287#L12 assume !(1 == ~n); 11683#L15 call #t~ret7 := fibo2(~n - 1);< 12278#fibo2ENTRY ~n := #in~n; 12279#L20 assume !(~n < 1); 12264#L22 assume 1 == ~n;#res := 1; 12265#fibo2FINAL assume true; 12670#fibo2EXIT >#52#return; 11714#L15-1 [2020-10-19 20:08:04,670 INFO L796 eck$LassoCheckResult]: Loop: 11714#L15-1 call #t~ret8 := fibo2(~n - 2);< 12362#fibo2ENTRY ~n := #in~n; 11766#L20 assume !(~n < 1); 11767#L22 assume !(1 == ~n); 11713#L25 call #t~ret9 := fibo1(~n - 1);< 11715#fibo1ENTRY ~n := #in~n; 12297#L10 assume !(~n < 1); 12298#L12 assume !(1 == ~n); 11743#L15 call #t~ret7 := fibo2(~n - 1);< 11745#fibo2ENTRY ~n := #in~n; 11751#L20 assume !(~n < 1); 12722#L22 assume 1 == ~n;#res := 1; 12720#fibo2FINAL assume true; 12676#fibo2EXIT >#52#return; 11714#L15-1 [2020-10-19 20:08:04,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:08:04,670 INFO L82 PathProgramCache]: Analyzing trace with hash -663651953, now seen corresponding path program 1 times [2020-10-19 20:08:04,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 20:08:04,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216486401] [2020-10-19 20:08:04,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 20:08:04,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:04,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-19 20:08:04,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:04,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-19 20:08:04,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:04,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-19 20:08:04,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:04,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-19 20:08:04,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:04,813 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 12 proven. 39 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-19 20:08:04,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216486401] [2020-10-19 20:08:04,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726778911] [2020-10-19 20:08:04,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 20:08:04,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:04,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-19 20:08:04,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:04,902 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 27 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-19 20:08:04,902 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 20:08:04,902 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2020-10-19 20:08:04,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143614495] [2020-10-19 20:08:04,903 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-19 20:08:04,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:08:04,904 INFO L82 PathProgramCache]: Analyzing trace with hash -815837104, now seen corresponding path program 2 times [2020-10-19 20:08:04,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 20:08:04,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937665589] [2020-10-19 20:08:04,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 20:08:04,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 20:08:04,908 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 20:08:04,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 20:08:04,911 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 20:08:04,912 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 20:08:05,056 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 20:08:05,056 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 20:08:05,056 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 20:08:05,056 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 20:08:05,056 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-19 20:08:05,057 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:05,057 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 20:08:05,057 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 20:08:05,057 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_8-2.c_Iteration7_Loop [2020-10-19 20:08:05,057 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 20:08:05,057 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 20:08:05,058 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 20:08:05,061 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 20:08:05,064 INFO 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 20:08:05,067 INFO 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 20:08:05,069 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 20:08:05,071 INFO 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 20:08:05,074 INFO 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 20:08:05,081 INFO 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 20:08:05,084 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:08:05,148 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 20:08:05,149 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:05,152 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:08:05,152 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 20:08:05,155 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 20:08:05,155 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#in~n=0} Honda state: {fibo2_#in~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:05,176 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:08:05,176 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 20:08:05,178 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 20:08:05,179 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#res=0} Honda state: {fibo2_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:05,201 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:08:05,201 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 20:08:05,203 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 20:08:05,204 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#t~ret9=0} Honda state: {fibo2_#t~ret9=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:05,226 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:08:05,227 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 20:08:05,229 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 20:08:05,229 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#res=0} Honda state: {fibo1_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 20:08:05,262 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:08:05,263 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 80 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:05,266 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 20:08:05,267 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#t~ret10=0} Honda state: {fibo2_#t~ret10=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:05,289 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:08:05,289 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 20:08:05,292 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 20:08:05,292 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_~n=0} Honda state: {fibo2_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:05,316 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:08:05,317 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:05,341 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-19 20:08:05,341 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 20:08:06,299 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-19 20:08:06,301 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 20:08:06,301 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 20:08:06,301 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 20:08:06,301 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 20:08:06,302 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-19 20:08:06,302 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:06,302 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 20:08:06,302 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 20:08:06,302 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_8-2.c_Iteration7_Loop [2020-10-19 20:08:06,302 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 20:08:06,302 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 20:08:06,304 INFO 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 20:08:06,308 INFO 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 20:08:06,310 INFO 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 20:08:06,312 INFO 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 20:08:06,314 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:08:06,317 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:08:06,324 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:08:06,326 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:08:06,329 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:08:06,385 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 20:08:06,386 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:06,388 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 20:08:06,389 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:08:06,390 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:08:06,390 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:08:06,390 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:08:06,390 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:08:06,391 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:08:06,391 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:08:06,392 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:06,416 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 20:08:06,418 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:08:06,418 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:08:06,418 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:08:06,419 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:08:06,419 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:08:06,419 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:08:06,419 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:08:06,421 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:06,446 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 20:08:06,447 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:08:06,447 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:08:06,447 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:08:06,447 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:08:06,448 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:08:06,448 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:08:06,448 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:08:06,450 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 20:08:06,477 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false Waiting until toolchain timeout for monitored process 87 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:06,479 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:08:06,479 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:08:06,480 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:08:06,480 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:08:06,480 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:08:06,480 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:08:06,480 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:08:06,482 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 20:08:06,544 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 20:08:06,546 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:08:06,546 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:08:06,547 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:08:06,547 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:08:06,547 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:08:06,548 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:08:06,549 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 88 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:06,550 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:06,577 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 20:08:06,579 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:08:06,579 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:08:06,579 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:08:06,579 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:08:06,579 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:08:06,580 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:08:06,580 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:08:06,583 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-19 20:08:06,587 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-19 20:08:06,587 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:06,590 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-19 20:08:06,590 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-19 20:08:06,590 INFO L510 LassoAnalysis]: Proved termination. [2020-10-19 20:08:06,590 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo1_~n) = 1*fibo1_~n Supporting invariants [] [2020-10-19 20:08:06,611 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-19 20:08:06,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:08:06,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:06,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-19 20:08:06,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:06,712 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:08:06,715 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:08:06,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:06,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-19 20:08:06,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:06,833 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 20:08:06,833 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 8 loop predicates [2020-10-19 20:08:06,833 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 1103 states and 1503 transitions. cyclomatic complexity: 417 Second operand 10 states. [2020-10-19 20:08:07,255 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 1103 states and 1503 transitions. cyclomatic complexity: 417. Second operand 10 states. Result 1956 states and 2660 transitions. Complement of second has 40 states. [2020-10-19 20:08:07,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 12 states 2 stem states 9 non-accepting loop states 1 accepting loop states [2020-10-19 20:08:07,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-10-19 20:08:07,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 67 transitions. [2020-10-19 20:08:07,257 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 67 transitions. Stem has 46 letters. Loop has 14 letters. [2020-10-19 20:08:07,257 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:08:07,257 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-19 20:08:07,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:08:07,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:07,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-19 20:08:07,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:07,351 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:08:07,356 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:08:07,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:07,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-19 20:08:07,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:07,465 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 20:08:07,466 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 8 loop predicates [2020-10-19 20:08:07,466 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 1103 states and 1503 transitions. cyclomatic complexity: 417 Second operand 10 states. [2020-10-19 20:08:07,741 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 1103 states and 1503 transitions. cyclomatic complexity: 417. Second operand 10 states. Result 1734 states and 2285 transitions. Complement of second has 26 states. [2020-10-19 20:08:07,742 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 20:08:07,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-10-19 20:08:07,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 46 transitions. [2020-10-19 20:08:07,742 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 46 transitions. Stem has 46 letters. Loop has 14 letters. [2020-10-19 20:08:07,743 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:08:07,743 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-19 20:08:07,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:08:07,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:07,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-19 20:08:07,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:07,817 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:08:07,819 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:08:07,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:07,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-19 20:08:07,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:07,920 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 20:08:07,920 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 8 loop predicates [2020-10-19 20:08:07,921 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 1103 states and 1503 transitions. cyclomatic complexity: 417 Second operand 10 states. [2020-10-19 20:08:08,339 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 1103 states and 1503 transitions. cyclomatic complexity: 417. Second operand 10 states. Result 5452 states and 7496 transitions. Complement of second has 124 states. [2020-10-19 20:08:08,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 12 states 2 stem states 9 non-accepting loop states 1 accepting loop states [2020-10-19 20:08:08,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-10-19 20:08:08,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 72 transitions. [2020-10-19 20:08:08,341 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 72 transitions. Stem has 46 letters. Loop has 14 letters. [2020-10-19 20:08:08,342 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:08:08,342 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 72 transitions. Stem has 60 letters. Loop has 14 letters. [2020-10-19 20:08:08,343 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:08:08,343 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 72 transitions. Stem has 46 letters. Loop has 28 letters. [2020-10-19 20:08:08,344 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:08:08,345 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 5452 states and 7496 transitions. [2020-10-19 20:08:08,406 INFO L131 ngComponentsAnalysis]: Automaton has 6 accepting balls. 243 [2020-10-19 20:08:08,449 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 5452 states to 2913 states and 4140 transitions. [2020-10-19 20:08:08,449 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 787 [2020-10-19 20:08:08,452 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 929 [2020-10-19 20:08:08,452 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2913 states and 4140 transitions. [2020-10-19 20:08:08,452 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 20:08:08,452 INFO L691 BuchiCegarLoop]: Abstraction has 2913 states and 4140 transitions. [2020-10-19 20:08:08,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2913 states and 4140 transitions. [2020-10-19 20:08:08,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2913 to 2461. [2020-10-19 20:08:08,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2461 states. [2020-10-19 20:08:08,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2461 states to 2461 states and 3426 transitions. [2020-10-19 20:08:08,543 INFO L714 BuchiCegarLoop]: Abstraction has 2461 states and 3426 transitions. [2020-10-19 20:08:08,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 20:08:08,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-19 20:08:08,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2020-10-19 20:08:08,544 INFO L87 Difference]: Start difference. First operand 2461 states and 3426 transitions. Second operand 17 states. [2020-10-19 20:08:08,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 20:08:08,969 INFO L93 Difference]: Finished difference Result 3452 states and 5090 transitions. [2020-10-19 20:08:08,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-19 20:08:08,970 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 3452 states and 5090 transitions. [2020-10-19 20:08:09,026 INFO L131 ngComponentsAnalysis]: Automaton has 11 accepting balls. 341 [2020-10-19 20:08:09,082 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 3452 states to 3449 states and 5086 transitions. [2020-10-19 20:08:09,082 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 1086 [2020-10-19 20:08:09,084 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 1086 [2020-10-19 20:08:09,085 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3449 states and 5086 transitions. [2020-10-19 20:08:09,085 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 20:08:09,085 INFO L691 BuchiCegarLoop]: Abstraction has 3449 states and 5086 transitions. [2020-10-19 20:08:09,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3449 states and 5086 transitions. [2020-10-19 20:08:09,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3449 to 3231. [2020-10-19 20:08:09,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3231 states. [2020-10-19 20:08:09,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3231 states to 3231 states and 4807 transitions. [2020-10-19 20:08:09,215 INFO L714 BuchiCegarLoop]: Abstraction has 3231 states and 4807 transitions. [2020-10-19 20:08:09,215 INFO L594 BuchiCegarLoop]: Abstraction has 3231 states and 4807 transitions. [2020-10-19 20:08:09,216 INFO L427 BuchiCegarLoop]: ======== Iteration 8============ [2020-10-19 20:08:09,216 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 3231 states and 4807 transitions. [2020-10-19 20:08:09,245 INFO L131 ngComponentsAnalysis]: Automaton has 11 accepting balls. 340 [2020-10-19 20:08:09,245 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 20:08:09,245 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 20:08:09,251 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [6, 6, 6, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 20:08:09,251 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 20:08:09,253 INFO L794 eck$LassoCheckResult]: Stem: 28905#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(18);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 28904#L-1 havoc main_#res;havoc main_#t~ret11, main_~x~0, main_~result~0;main_~x~0 := 8; 28851#L39 call main_#t~ret11 := fibo1(main_~x~0);< 28852#fibo1ENTRY ~n := #in~n; 29012#L10 assume !(~n < 1); 29011#L12 assume !(1 == ~n); 29007#L15 call #t~ret7 := fibo2(~n - 1);< 29010#fibo2ENTRY ~n := #in~n; 29009#L20 assume !(~n < 1); 29008#L22 assume !(1 == ~n); 29003#L25 call #t~ret9 := fibo1(~n - 1);< 29006#fibo1ENTRY ~n := #in~n; 29005#L10 assume !(~n < 1); 29004#L12 assume !(1 == ~n); 28998#L15 call #t~ret7 := fibo2(~n - 1);< 29002#fibo2ENTRY ~n := #in~n; 29001#L20 assume !(~n < 1); 29000#L22 assume !(1 == ~n); 28963#L25 call #t~ret9 := fibo1(~n - 1);< 28996#fibo1ENTRY ~n := #in~n; 28993#L10 assume !(~n < 1); 28978#L12 assume !(1 == ~n); 28968#L15 call #t~ret7 := fibo2(~n - 1);< 28987#fibo2ENTRY ~n := #in~n; 28985#L20 assume !(~n < 1); 28981#L22 assume 1 == ~n;#res := 1; 28982#fibo2FINAL assume true; 28967#fibo2EXIT >#52#return; 28961#L15-1 call #t~ret8 := fibo2(~n - 2);< 28964#fibo2ENTRY ~n := #in~n; 29013#L20 assume !(~n < 1); 29014#L22 assume !(1 == ~n); 28947#L25 call #t~ret9 := fibo1(~n - 1);< 28946#fibo1ENTRY ~n := #in~n; 28948#L10 assume !(~n < 1); 28977#L12 assume !(1 == ~n); 28966#L15 call #t~ret7 := fibo2(~n - 1);< 28969#fibo2ENTRY ~n := #in~n; 28991#L20 assume !(~n < 1); 28979#L22 assume 1 == ~n;#res := 1; 28974#fibo2FINAL assume true; 28965#fibo2EXIT >#52#return; 28961#L15-1 call #t~ret8 := fibo2(~n - 2);< 28964#fibo2ENTRY ~n := #in~n; 29015#L20 assume !(~n < 1); 30398#L22 assume !(1 == ~n); 30002#L25 call #t~ret9 := fibo1(~n - 1);< 30003#fibo1ENTRY ~n := #in~n; 30393#L10 assume !(~n < 1); 30391#L12 assume 1 == ~n;#res := 1; 30390#fibo1FINAL assume true; 30001#fibo1EXIT >#48#return; 29996#L25-1 call #t~ret10 := fibo1(~n - 2);< 29999#fibo1ENTRY ~n := #in~n; 30297#L10 assume ~n < 1;#res := 0; 30287#fibo1FINAL assume true; 29995#fibo1EXIT >#50#return; 29990#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret10;havoc #t~ret9; 29989#fibo2FINAL assume true; 29958#fibo2EXIT >#54#return; 29947#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 29939#fibo1FINAL assume true; 29880#fibo1EXIT >#48#return; 29878#L25-1 [2020-10-19 20:08:09,253 INFO L796 eck$LassoCheckResult]: Loop: 29878#L25-1 call #t~ret10 := fibo1(~n - 2);< 29927#fibo1ENTRY ~n := #in~n; 29986#L10 assume !(~n < 1); 29984#L12 assume !(1 == ~n); 29926#L15 call #t~ret7 := fibo2(~n - 1);< 29983#fibo2ENTRY ~n := #in~n; 30397#L20 assume !(~n < 1); 30395#L22 assume 1 == ~n;#res := 1; 29982#fibo2FINAL assume true; 29953#fibo2EXIT >#52#return; 29954#L15-1 call #t~ret8 := fibo2(~n - 2);< 29959#fibo2ENTRY ~n := #in~n; 30220#L20 assume !(~n < 1); 30218#L22 assume !(1 == ~n); 29882#L25 call #t~ret9 := fibo1(~n - 1);< 29925#fibo1ENTRY ~n := #in~n; 30433#L10 assume !(~n < 1); 30431#L12 assume !(1 == ~n); 30114#L15 call #t~ret7 := fibo2(~n - 1);< 30115#fibo2ENTRY ~n := #in~n; 30209#L20 assume !(~n < 1); 30185#L22 assume 1 == ~n;#res := 1; 30133#fibo2FINAL assume true; 30112#fibo2EXIT >#52#return; 30103#L15-1 call #t~ret8 := fibo2(~n - 2);< 30108#fibo2ENTRY ~n := #in~n; 30174#L20 assume ~n < 1;#res := 0; 30140#fibo2FINAL assume true; 30102#fibo2EXIT >#54#return; 30101#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 30099#fibo1FINAL assume true; 30096#fibo1EXIT >#48#return; 29878#L25-1 [2020-10-19 20:08:09,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:08:09,254 INFO L82 PathProgramCache]: Analyzing trace with hash -947123609, now seen corresponding path program 1 times [2020-10-19 20:08:09,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 20:08:09,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472475656] [2020-10-19 20:08:09,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 20:08:09,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:09,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-19 20:08:09,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:09,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-10-19 20:08:09,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:09,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-19 20:08:09,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:09,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-19 20:08:09,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:09,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-19 20:08:09,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:09,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-19 20:08:09,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:09,465 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 11 proven. 79 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-19 20:08:09,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472475656] [2020-10-19 20:08:09,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852789350] [2020-10-19 20:08:09,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 20:08:09,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:09,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-19 20:08:09,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:09,558 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 62 proven. 22 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-19 20:08:09,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 20:08:09,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-19 20:08:09,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931871220] [2020-10-19 20:08:09,560 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-19 20:08:09,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:08:09,560 INFO L82 PathProgramCache]: Analyzing trace with hash 630784763, now seen corresponding path program 1 times [2020-10-19 20:08:09,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 20:08:09,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651292160] [2020-10-19 20:08:09,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 20:08:09,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:09,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-19 20:08:09,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:09,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-19 20:08:09,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:09,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-19 20:08:09,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:09,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-19 20:08:09,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:09,693 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-19 20:08:09,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651292160] [2020-10-19 20:08:09,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976283471] [2020-10-19 20:08:09,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 20:08:09,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:09,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-19 20:08:09,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:09,738 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 20 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-19 20:08:09,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 20:08:09,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-19 20:08:09,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569312897] [2020-10-19 20:08:09,740 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-10-19 20:08:09,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 20:08:09,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-19 20:08:09,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-19 20:08:09,740 INFO L87 Difference]: Start difference. First operand 3231 states and 4807 transitions. cyclomatic complexity: 1612 Second operand 8 states. [2020-10-19 20:08:09,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 20:08:09,834 INFO L93 Difference]: Finished difference Result 1630 states and 2151 transitions. [2020-10-19 20:08:09,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-19 20:08:09,835 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1630 states and 2151 transitions. [2020-10-19 20:08:09,851 INFO L131 ngComponentsAnalysis]: Automaton has 5 accepting balls. 132 [2020-10-19 20:08:09,867 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1630 states to 1533 states and 2040 transitions. [2020-10-19 20:08:09,868 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 596 [2020-10-19 20:08:09,869 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 596 [2020-10-19 20:08:09,869 INFO L73 IsDeterministic]: Start isDeterministic. Operand 1533 states and 2040 transitions. [2020-10-19 20:08:09,869 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 20:08:09,869 INFO L691 BuchiCegarLoop]: Abstraction has 1533 states and 2040 transitions. [2020-10-19 20:08:09,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1533 states and 2040 transitions. [2020-10-19 20:08:09,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1533 to 1399. [2020-10-19 20:08:09,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1399 states. [2020-10-19 20:08:09,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1399 states to 1399 states and 1795 transitions. [2020-10-19 20:08:09,911 INFO L714 BuchiCegarLoop]: Abstraction has 1399 states and 1795 transitions. [2020-10-19 20:08:09,911 INFO L594 BuchiCegarLoop]: Abstraction has 1399 states and 1795 transitions. [2020-10-19 20:08:09,911 INFO L427 BuchiCegarLoop]: ======== Iteration 9============ [2020-10-19 20:08:09,911 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 1399 states and 1795 transitions. [2020-10-19 20:08:09,918 INFO L131 ngComponentsAnalysis]: Automaton has 5 accepting balls. 132 [2020-10-19 20:08:09,918 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 20:08:09,919 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 20:08:09,921 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [6, 5, 5, 4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 20:08:09,921 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [10, 9, 8, 7, 6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2] [2020-10-19 20:08:09,921 INFO L794 eck$LassoCheckResult]: Stem: 34168#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(18);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 34158#L-1 havoc main_#res;havoc main_#t~ret11, main_~x~0, main_~result~0;main_~x~0 := 8; 34119#L39 call main_#t~ret11 := fibo1(main_~x~0);< 34120#fibo1ENTRY ~n := #in~n; 34215#L10 assume !(~n < 1); 34214#L12 assume !(1 == ~n); 34210#L15 call #t~ret7 := fibo2(~n - 1);< 34213#fibo2ENTRY ~n := #in~n; 34212#L20 assume !(~n < 1); 34211#L22 assume !(1 == ~n); 34204#L25 call #t~ret9 := fibo1(~n - 1);< 34209#fibo1ENTRY ~n := #in~n; 34207#L10 assume !(~n < 1); 34208#L12 assume !(1 == ~n); 34197#L15 call #t~ret7 := fibo2(~n - 1);< 34205#fibo2ENTRY ~n := #in~n; 34200#L20 assume !(~n < 1); 34201#L22 assume !(1 == ~n); 34193#L25 call #t~ret9 := fibo1(~n - 1);< 34192#fibo1ENTRY ~n := #in~n; 34195#L10 assume !(~n < 1); 34206#L12 assume !(1 == ~n); 34199#L15 call #t~ret7 := fibo2(~n - 1);< 34202#fibo2ENTRY ~n := #in~n; 34203#L20 assume !(~n < 1); 34198#L22 assume !(1 == ~n); 34194#L25 call #t~ret9 := fibo1(~n - 1);< 34192#fibo1ENTRY ~n := #in~n; 34195#L10 assume !(~n < 1); 34206#L12 assume !(1 == ~n); 34199#L15 call #t~ret7 := fibo2(~n - 1);< 34202#fibo2ENTRY ~n := #in~n; 34203#L20 assume !(~n < 1); 34198#L22 assume !(1 == ~n); 34194#L25 call #t~ret9 := fibo1(~n - 1);< 34192#fibo1ENTRY ~n := #in~n; 34196#L10 assume !(~n < 1); 34247#L12 assume 1 == ~n;#res := 1; 34248#fibo1FINAL assume true; 35195#fibo1EXIT >#48#return; 35191#L25-1 call #t~ret10 := fibo1(~n - 2);< 35194#fibo1ENTRY ~n := #in~n; 35197#L10 assume ~n < 1;#res := 0; 35196#fibo1FINAL assume true; 35190#fibo1EXIT >#50#return; 35188#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret10;havoc #t~ret9; 35186#fibo2FINAL assume true; 35088#fibo2EXIT >#52#return; 34136#L15-1 call #t~ret8 := fibo2(~n - 2);< 35098#fibo2ENTRY ~n := #in~n; 35404#L20 assume ~n < 1;#res := 0; 35403#fibo2FINAL assume true; 35401#fibo2EXIT >#54#return; 35400#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 35399#fibo1FINAL assume true; 35117#fibo1EXIT >#48#return; 35090#L25-1 [2020-10-19 20:08:09,922 INFO L796 eck$LassoCheckResult]: Loop: 35090#L25-1 call #t~ret10 := fibo1(~n - 2);< 35109#fibo1ENTRY ~n := #in~n; 35147#L10 assume !(~n < 1); 35145#L12 assume !(1 == ~n); 35083#L15 call #t~ret7 := fibo2(~n - 1);< 35094#fibo2ENTRY ~n := #in~n; 35133#L20 assume !(~n < 1); 35129#L22 assume !(1 == ~n); 35093#L25 call #t~ret9 := fibo1(~n - 1);< 35109#fibo1ENTRY ~n := #in~n; 35147#L10 assume !(~n < 1); 35145#L12 assume !(1 == ~n); 35083#L15 call #t~ret7 := fibo2(~n - 1);< 35094#fibo2ENTRY ~n := #in~n; 35133#L20 assume !(~n < 1); 35129#L22 assume !(1 == ~n); 35093#L25 call #t~ret9 := fibo1(~n - 1);< 35109#fibo1ENTRY ~n := #in~n; 35147#L10 assume !(~n < 1); 35145#L12 assume !(1 == ~n); 35083#L15 call #t~ret7 := fibo2(~n - 1);< 35094#fibo2ENTRY ~n := #in~n; 35133#L20 assume !(~n < 1); 35129#L22 assume !(1 == ~n); 35093#L25 call #t~ret9 := fibo1(~n - 1);< 35109#fibo1ENTRY ~n := #in~n; 35147#L10 assume !(~n < 1); 35145#L12 assume 1 == ~n;#res := 1; 35143#fibo1FINAL assume true; 35136#fibo1EXIT >#48#return; 34107#L25-1 call #t~ret10 := fibo1(~n - 2);< 34165#fibo1ENTRY ~n := #in~n; 34106#L10 assume ~n < 1;#res := 0; 34108#fibo1FINAL assume true; 35110#fibo1EXIT >#50#return; 35103#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret10;havoc #t~ret9; 35097#fibo2FINAL assume true; 35082#fibo2EXIT >#52#return; 34135#L15-1 call #t~ret8 := fibo2(~n - 2);< 35132#fibo2ENTRY ~n := #in~n; 35146#L20 assume !(~n < 1); 35144#L22 assume !(1 == ~n); 34970#L25 call #t~ret9 := fibo1(~n - 1);< 35120#fibo1ENTRY ~n := #in~n; 35160#L10 assume !(~n < 1); 35048#L12 assume !(1 == ~n); 35049#L15 call #t~ret7 := fibo2(~n - 1);< 35183#fibo2ENTRY ~n := #in~n; 35217#L20 assume !(~n < 1); 35227#L22 assume !(1 == ~n); 35221#L25 call #t~ret9 := fibo1(~n - 1);< 35224#fibo1ENTRY ~n := #in~n; 35287#L10 assume !(~n < 1); 35286#L12 assume 1 == ~n;#res := 1; 35229#fibo1FINAL assume true; 35220#fibo1EXIT >#48#return; 35203#L25-1 call #t~ret10 := fibo1(~n - 2);< 35208#fibo1ENTRY ~n := #in~n; 35280#L10 assume ~n < 1;#res := 0; 35277#fibo1FINAL assume true; 35200#fibo1EXIT >#50#return; 35199#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret10;havoc #t~ret9; 35198#fibo2FINAL assume true; 35182#fibo2EXIT >#52#return; 35175#L15-1 call #t~ret8 := fibo2(~n - 2);< 35180#fibo2ENTRY ~n := #in~n; 35214#L20 assume ~n < 1;#res := 0; 35179#fibo2FINAL assume true; 35174#fibo2EXIT >#54#return; 35177#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 35432#fibo1FINAL assume true; 35118#fibo1EXIT >#48#return; 35090#L25-1 call #t~ret10 := fibo1(~n - 2);< 35109#fibo1ENTRY ~n := #in~n; 35147#L10 assume !(~n < 1); 35145#L12 assume 1 == ~n;#res := 1; 35143#fibo1FINAL assume true; 35136#fibo1EXIT >#50#return; 35107#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret10;havoc #t~ret9; 35141#fibo2FINAL assume true; 35131#fibo2EXIT >#54#return; 35084#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 35128#fibo1FINAL assume true; 35119#fibo1EXIT >#48#return; 35090#L25-1 call #t~ret10 := fibo1(~n - 2);< 35109#fibo1ENTRY ~n := #in~n; 35147#L10 assume !(~n < 1); 35145#L12 assume 1 == ~n;#res := 1; 35143#fibo1FINAL assume true; 35136#fibo1EXIT >#50#return; 35107#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret10;havoc #t~ret9; 35141#fibo2FINAL assume true; 35131#fibo2EXIT >#52#return; 34135#L15-1 call #t~ret8 := fibo2(~n - 2);< 35149#fibo2ENTRY ~n := #in~n; 35413#L20 assume ~n < 1;#res := 0; 35247#fibo2FINAL assume true; 35152#fibo2EXIT >#54#return; 35154#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 35398#fibo1FINAL assume true; 35105#fibo1EXIT >#48#return; 35090#L25-1 [2020-10-19 20:08:09,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:08:09,922 INFO L82 PathProgramCache]: Analyzing trace with hash 50807002, now seen corresponding path program 1 times [2020-10-19 20:08:09,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 20:08:09,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714319737] [2020-10-19 20:08:09,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 20:08:09,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:10,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-19 20:08:10,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:10,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-19 20:08:10,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:10,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-19 20:08:10,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:10,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-19 20:08:10,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:10,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-19 20:08:10,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:10,135 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 28 proven. 47 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-19 20:08:10,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714319737] [2020-10-19 20:08:10,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106067606] [2020-10-19 20:08:10,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 20:08:10,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:10,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-19 20:08:10,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:10,266 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 28 proven. 53 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-19 20:08:10,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 20:08:10,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 24 [2020-10-19 20:08:10,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105442482] [2020-10-19 20:08:10,268 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-19 20:08:10,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:08:10,268 INFO L82 PathProgramCache]: Analyzing trace with hash 1856679522, now seen corresponding path program 1 times [2020-10-19 20:08:10,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 20:08:10,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21332743] [2020-10-19 20:08:10,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 20:08:10,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:10,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-19 20:08:10,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:10,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-19 20:08:10,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:10,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-19 20:08:10,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:10,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-19 20:08:10,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:10,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-19 20:08:10,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:10,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-19 20:08:10,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:10,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-19 20:08:10,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:10,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-19 20:08:10,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:10,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-19 20:08:10,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:10,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-19 20:08:10,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:10,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-19 20:08:10,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:10,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-19 20:08:10,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:10,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-10-19 20:08:10,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:10,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-10-19 20:08:10,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:10,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-10-19 20:08:10,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:10,460 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 86 proven. 37 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-10-19 20:08:10,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21332743] [2020-10-19 20:08:10,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165676519] [2020-10-19 20:08:10,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 20:08:10,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:10,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-19 20:08:10,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:10,620 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 142 proven. 47 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-10-19 20:08:10,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 20:08:10,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 16 [2020-10-19 20:08:10,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114191231] [2020-10-19 20:08:10,622 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-10-19 20:08:10,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 20:08:10,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-19 20:08:10,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2020-10-19 20:08:10,623 INFO L87 Difference]: Start difference. First operand 1399 states and 1795 transitions. cyclomatic complexity: 410 Second operand 24 states. [2020-10-19 20:08:11,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 20:08:11,517 INFO L93 Difference]: Finished difference Result 1581 states and 1917 transitions. [2020-10-19 20:08:11,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-19 20:08:11,518 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1581 states and 1917 transitions. [2020-10-19 20:08:11,530 INFO L131 ngComponentsAnalysis]: Automaton has 5 accepting balls. 141 [2020-10-19 20:08:11,538 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1581 states to 859 states and 1021 transitions. [2020-10-19 20:08:11,539 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 476 [2020-10-19 20:08:11,539 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 476 [2020-10-19 20:08:11,540 INFO L73 IsDeterministic]: Start isDeterministic. Operand 859 states and 1021 transitions. [2020-10-19 20:08:11,540 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 20:08:11,540 INFO L691 BuchiCegarLoop]: Abstraction has 859 states and 1021 transitions. [2020-10-19 20:08:11,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 859 states and 1021 transitions. [2020-10-19 20:08:11,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 859 to 738. [2020-10-19 20:08:11,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 738 states. [2020-10-19 20:08:11,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 738 states to 738 states and 882 transitions. [2020-10-19 20:08:11,559 INFO L714 BuchiCegarLoop]: Abstraction has 738 states and 882 transitions. [2020-10-19 20:08:11,559 INFO L594 BuchiCegarLoop]: Abstraction has 738 states and 882 transitions. [2020-10-19 20:08:11,559 INFO L427 BuchiCegarLoop]: ======== Iteration 10============ [2020-10-19 20:08:11,559 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 738 states and 882 transitions. [2020-10-19 20:08:11,563 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 108 [2020-10-19 20:08:11,563 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 20:08:11,563 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 20:08:11,565 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [5, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 20:08:11,565 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 20:08:11,565 INFO L794 eck$LassoCheckResult]: Stem: 38127#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(18);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 38123#L-1 havoc main_#res;havoc main_#t~ret11, main_~x~0, main_~result~0;main_~x~0 := 8; 38100#L39 call main_#t~ret11 := fibo1(main_~x~0);< 38101#fibo1ENTRY ~n := #in~n; 38213#L10 assume !(~n < 1); 38212#L12 assume !(1 == ~n); 38208#L15 call #t~ret7 := fibo2(~n - 1);< 38211#fibo2ENTRY ~n := #in~n; 38210#L20 assume !(~n < 1); 38209#L22 assume !(1 == ~n); 38204#L25 call #t~ret9 := fibo1(~n - 1);< 38207#fibo1ENTRY ~n := #in~n; 38206#L10 assume !(~n < 1); 38205#L12 assume !(1 == ~n); 38200#L15 call #t~ret7 := fibo2(~n - 1);< 38203#fibo2ENTRY ~n := #in~n; 38202#L20 assume !(~n < 1); 38201#L22 assume !(1 == ~n); 38177#L25 call #t~ret9 := fibo1(~n - 1);< 38178#fibo1ENTRY ~n := #in~n; 38198#L10 assume !(~n < 1); 38195#L12 assume !(1 == ~n); 38173#L15 call #t~ret7 := fibo2(~n - 1);< 38186#fibo2ENTRY ~n := #in~n; 38182#L20 assume !(~n < 1); 38180#L22 assume !(1 == ~n); 38176#L25 call #t~ret9 := fibo1(~n - 1);< 38178#fibo1ENTRY ~n := #in~n; 38197#L10 assume !(~n < 1); 38193#L12 assume 1 == ~n;#res := 1; 38194#fibo1FINAL assume true; 38397#fibo1EXIT >#48#return; 38391#L25-1 call #t~ret10 := fibo1(~n - 2);< 38392#fibo1ENTRY ~n := #in~n; 38620#L10 assume ~n < 1;#res := 0; 38619#fibo1FINAL assume true; 38390#fibo1EXIT >#50#return; 38388#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret10;havoc #t~ret9; 38387#fibo2FINAL assume true; 38385#fibo2EXIT >#52#return; 38368#L15-1 call #t~ret8 := fibo2(~n - 2);< 38382#fibo2ENTRY ~n := #in~n; 38606#L20 assume !(~n < 1); 38604#L22 assume 1 == ~n;#res := 1; 38603#fibo2FINAL assume true; 38597#fibo2EXIT >#54#return; 38595#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 38592#fibo1FINAL assume true; 38364#fibo1EXIT >#48#return; 38346#L25-1 call #t~ret10 := fibo1(~n - 2);< 38351#fibo1ENTRY [2020-10-19 20:08:11,566 INFO L796 eck$LassoCheckResult]: Loop: 38351#fibo1ENTRY ~n := #in~n; 38617#L10 assume !(~n < 1); 38374#L12 assume !(1 == ~n); 38367#L15 call #t~ret7 := fibo2(~n - 1);< 38373#fibo2ENTRY ~n := #in~n; 38409#L20 assume !(~n < 1); 38404#L22 assume !(1 == ~n); 38348#L25 call #t~ret9 := fibo1(~n - 1);< 38357#fibo1ENTRY ~n := #in~n; 38377#L10 assume !(~n < 1); 38374#L12 assume !(1 == ~n); 38367#L15 call #t~ret7 := fibo2(~n - 1);< 38373#fibo2ENTRY ~n := #in~n; 38409#L20 assume !(~n < 1); 38404#L22 assume 1 == ~n;#res := 1; 38405#fibo2FINAL assume true; 38699#fibo2EXIT >#52#return; 38638#L15-1 call #t~ret8 := fibo2(~n - 2);< 38639#fibo2ENTRY ~n := #in~n; 38694#L20 assume ~n < 1;#res := 0; 38645#fibo2FINAL assume true; 38637#fibo2EXIT >#54#return; 38635#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 38634#fibo1FINAL assume true; 38342#fibo1EXIT >#48#return; 38344#L25-1 call #t~ret10 := fibo1(~n - 2);< 38351#fibo1ENTRY [2020-10-19 20:08:11,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:08:11,566 INFO L82 PathProgramCache]: Analyzing trace with hash 482791451, now seen corresponding path program 2 times [2020-10-19 20:08:11,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 20:08:11,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881170209] [2020-10-19 20:08:11,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 20:08:11,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:11,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-19 20:08:11,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:11,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-19 20:08:11,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:11,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-19 20:08:11,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:11,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-19 20:08:11,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:11,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-19 20:08:11,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:11,774 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 3 proven. 50 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-19 20:08:11,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881170209] [2020-10-19 20:08:11,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001044746] [2020-10-19 20:08:11,775 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 20:08:11,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-19 20:08:11,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 20:08:11,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-19 20:08:11,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:11,880 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 3 proven. 50 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-19 20:08:11,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 20:08:11,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2020-10-19 20:08:11,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422853944] [2020-10-19 20:08:11,882 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-19 20:08:11,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:08:11,883 INFO L82 PathProgramCache]: Analyzing trace with hash 1552659165, now seen corresponding path program 2 times [2020-10-19 20:08:11,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 20:08:11,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751536183] [2020-10-19 20:08:11,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 20:08:11,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 20:08:11,890 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 20:08:11,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 20:08:11,893 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 20:08:11,895 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 20:08:12,204 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 20:08:12,204 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 20:08:12,205 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 20:08:12,205 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 20:08:12,205 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-19 20:08:12,205 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:12,205 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 20:08:12,205 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 20:08:12,205 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_8-2.c_Iteration10_Loop [2020-10-19 20:08:12,205 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 20:08:12,205 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 20:08:12,206 INFO 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 20:08:12,217 INFO 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 20:08:12,227 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:08:12,229 INFO 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 20:08:12,232 INFO 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 20:08:12,234 INFO 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 20:08:12,236 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:08:12,238 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:08:12,241 INFO 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 20:08:12,243 INFO 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 20:08:12,295 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 20:08:12,295 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:12,302 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:08:12,302 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 20:08:12,304 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 20:08:12,305 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#t~ret8=0} Honda state: {fibo1_#t~ret8=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:12,330 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:08:12,331 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:12,354 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-19 20:08:12,355 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 20:08:12,428 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-19 20:08:12,429 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 20:08:12,430 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 20:08:12,430 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 20:08:12,430 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 20:08:12,430 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-19 20:08:12,430 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:12,430 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 20:08:12,430 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 20:08:12,430 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_8-2.c_Iteration10_Loop [2020-10-19 20:08:12,430 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 20:08:12,430 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 20:08:12,431 INFO 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 20:08:12,433 INFO 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 20:08:12,446 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:08:12,448 INFO 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 20:08:12,450 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:08:12,452 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:08:12,454 INFO 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 20:08:12,461 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:08:12,463 INFO 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 20:08:12,465 INFO 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 20:08:12,521 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 20:08:12,521 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:12,525 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 20:08:12,527 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:08:12,527 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:08:12,527 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:08:12,527 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:08:12,527 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:08:12,527 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:08:12,528 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:08:12,529 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:12,550 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 20:08:12,552 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:08:12,552 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:08:12,552 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:08:12,552 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:08:12,552 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:08:12,554 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:08:12,554 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:08:12,556 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-19 20:08:12,559 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-19 20:08:12,559 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:12,562 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-19 20:08:12,562 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-19 20:08:12,563 INFO L510 LassoAnalysis]: Proved termination. [2020-10-19 20:08:12,563 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo1_#in~n) = 1*fibo1_#in~n Supporting invariants [] [2020-10-19 20:08:12,584 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-19 20:08:12,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:08:12,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:12,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-19 20:08:12,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:12,708 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:08:12,711 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:08:12,712 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:08:12,714 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:08:12,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:12,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-19 20:08:12,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:12,896 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-19 20:08:12,897 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 10 loop predicates [2020-10-19 20:08:12,897 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 738 states and 882 transitions. cyclomatic complexity: 153 Second operand 12 states. [2020-10-19 20:08:13,157 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 738 states and 882 transitions. cyclomatic complexity: 153. Second operand 12 states. Result 873 states and 1029 transitions. Complement of second has 16 states. [2020-10-19 20:08:13,158 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 20:08:13,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-10-19 20:08:13,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 41 transitions. [2020-10-19 20:08:13,159 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 41 transitions. Stem has 50 letters. Loop has 26 letters. [2020-10-19 20:08:13,160 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:08:13,160 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-19 20:08:13,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:08:13,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:13,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-19 20:08:13,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:13,275 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:08:13,278 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:08:13,280 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:08:13,283 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:08:13,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:13,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-19 20:08:13,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:13,503 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-19 20:08:13,503 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 10 loop predicates [2020-10-19 20:08:13,503 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 738 states and 882 transitions. cyclomatic complexity: 153 Second operand 12 states. [2020-10-19 20:08:14,001 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 738 states and 882 transitions. cyclomatic complexity: 153. Second operand 12 states. Result 925 states and 1086 transitions. Complement of second has 39 states. [2020-10-19 20:08:14,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 11 states 2 stem states 8 non-accepting loop states 1 accepting loop states [2020-10-19 20:08:14,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-10-19 20:08:14,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 56 transitions. [2020-10-19 20:08:14,003 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 56 transitions. Stem has 50 letters. Loop has 26 letters. [2020-10-19 20:08:14,003 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:08:14,003 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-19 20:08:14,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:08:14,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:14,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-19 20:08:14,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:14,089 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:08:14,091 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:08:14,093 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:08:14,095 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:08:14,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:14,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-19 20:08:14,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:14,269 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-19 20:08:14,270 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 10 loop predicates [2020-10-19 20:08:14,270 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 738 states and 882 transitions. cyclomatic complexity: 153 Second operand 12 states. [2020-10-19 20:08:14,548 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 738 states and 882 transitions. cyclomatic complexity: 153. Second operand 12 states. Result 1091 states and 1260 transitions. Complement of second has 15 states. [2020-10-19 20:08:14,549 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 20:08:14,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-10-19 20:08:14,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 45 transitions. [2020-10-19 20:08:14,550 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 45 transitions. Stem has 50 letters. Loop has 26 letters. [2020-10-19 20:08:14,552 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:08:14,552 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-19 20:08:14,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:08:14,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:14,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-19 20:08:14,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:14,645 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:08:14,650 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:08:14,651 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:08:14,654 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:08:14,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:14,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-19 20:08:14,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:14,823 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-19 20:08:14,823 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and with honda bouncer for loop.2 stem predicates 10 loop predicates [2020-10-19 20:08:14,823 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 738 states and 882 transitions. cyclomatic complexity: 153 Second operand 12 states. [2020-10-19 20:08:15,361 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 738 states and 882 transitions. cyclomatic complexity: 153. Second operand 12 states. Result 1443 states and 1661 transitions. Complement of second has 43 states. [2020-10-19 20:08:15,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 11 states 2 stem states 8 non-accepting loop states 1 accepting loop states [2020-10-19 20:08:15,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-10-19 20:08:15,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 60 transitions. [2020-10-19 20:08:15,364 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 60 transitions. Stem has 50 letters. Loop has 26 letters. [2020-10-19 20:08:15,364 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:08:15,365 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 60 transitions. Stem has 76 letters. Loop has 26 letters. [2020-10-19 20:08:15,365 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:08:15,365 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 60 transitions. Stem has 50 letters. Loop has 52 letters. [2020-10-19 20:08:15,367 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:08:15,367 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1443 states and 1661 transitions. [2020-10-19 20:08:15,379 INFO L131 ngComponentsAnalysis]: Automaton has 8 accepting balls. 188 [2020-10-19 20:08:15,390 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1443 states to 1051 states and 1245 transitions. [2020-10-19 20:08:15,390 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 439 [2020-10-19 20:08:15,392 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 498 [2020-10-19 20:08:15,392 INFO L73 IsDeterministic]: Start isDeterministic. Operand 1051 states and 1245 transitions. [2020-10-19 20:08:15,392 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 20:08:15,392 INFO L691 BuchiCegarLoop]: Abstraction has 1051 states and 1245 transitions. [2020-10-19 20:08:15,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1051 states and 1245 transitions. [2020-10-19 20:08:15,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1051 to 951. [2020-10-19 20:08:15,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 951 states. [2020-10-19 20:08:15,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 951 states to 951 states and 1110 transitions. [2020-10-19 20:08:15,417 INFO L714 BuchiCegarLoop]: Abstraction has 951 states and 1110 transitions. [2020-10-19 20:08:15,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 20:08:15,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-19 20:08:15,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2020-10-19 20:08:15,418 INFO L87 Difference]: Start difference. First operand 951 states and 1110 transitions. Second operand 18 states. [2020-10-19 20:08:15,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 20:08:15,939 INFO L93 Difference]: Finished difference Result 1468 states and 1837 transitions. [2020-10-19 20:08:15,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-19 20:08:15,939 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1468 states and 1837 transitions. [2020-10-19 20:08:15,949 INFO L131 ngComponentsAnalysis]: Automaton has 10 accepting balls. 288 [2020-10-19 20:08:15,963 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1468 states to 1398 states and 1727 transitions. [2020-10-19 20:08:15,963 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 618 [2020-10-19 20:08:15,964 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 618 [2020-10-19 20:08:15,965 INFO L73 IsDeterministic]: Start isDeterministic. Operand 1398 states and 1727 transitions. [2020-10-19 20:08:15,966 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 20:08:15,966 INFO L691 BuchiCegarLoop]: Abstraction has 1398 states and 1727 transitions. [2020-10-19 20:08:15,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1398 states and 1727 transitions. [2020-10-19 20:08:15,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1398 to 1143. [2020-10-19 20:08:15,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1143 states. [2020-10-19 20:08:15,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1143 states to 1143 states and 1395 transitions. [2020-10-19 20:08:15,995 INFO L714 BuchiCegarLoop]: Abstraction has 1143 states and 1395 transitions. [2020-10-19 20:08:15,995 INFO L594 BuchiCegarLoop]: Abstraction has 1143 states and 1395 transitions. [2020-10-19 20:08:15,996 INFO L427 BuchiCegarLoop]: ======== Iteration 11============ [2020-10-19 20:08:15,996 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 1143 states and 1395 transitions. [2020-10-19 20:08:16,001 INFO L131 ngComponentsAnalysis]: Automaton has 7 accepting balls. 212 [2020-10-19 20:08:16,001 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 20:08:16,001 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 20:08:16,003 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [6, 5, 5, 5, 5, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 20:08:16,003 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 20:08:16,003 INFO L794 eck$LassoCheckResult]: Stem: 46989#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(18);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 46988#L-1 havoc main_#res;havoc main_#t~ret11, main_~x~0, main_~result~0;main_~x~0 := 8; 46953#L39 call main_#t~ret11 := fibo1(main_~x~0);< 46954#fibo1ENTRY ~n := #in~n; 47029#L10 assume !(~n < 1); 47027#L12 assume !(1 == ~n); 47024#L15 call #t~ret7 := fibo2(~n - 1);< 47025#fibo2ENTRY ~n := #in~n; 47040#L20 assume !(~n < 1); 47038#L22 assume !(1 == ~n); 47035#L25 call #t~ret9 := fibo1(~n - 1);< 47036#fibo1ENTRY ~n := #in~n; 47103#L10 assume !(~n < 1); 47100#L12 assume !(1 == ~n); 47052#L15 call #t~ret7 := fibo2(~n - 1);< 47053#fibo2ENTRY ~n := #in~n; 47158#L20 assume !(~n < 1); 47153#L22 assume !(1 == ~n); 47097#L25 call #t~ret9 := fibo1(~n - 1);< 47099#fibo1ENTRY ~n := #in~n; 47454#L10 assume !(~n < 1); 47504#L12 assume !(1 == ~n); 47149#L15 call #t~ret7 := fibo2(~n - 1);< 47150#fibo2ENTRY ~n := #in~n; 47448#L20 assume !(~n < 1); 47447#L22 assume !(1 == ~n); 47098#L25 call #t~ret9 := fibo1(~n - 1);< 47099#fibo1ENTRY ~n := #in~n; 47452#L10 assume !(~n < 1); 47450#L12 assume 1 == ~n;#res := 1; 47449#fibo1FINAL assume true; 47446#fibo1EXIT >#48#return; 47444#L25-1 call #t~ret10 := fibo1(~n - 2);< 47445#fibo1ENTRY ~n := #in~n; 47455#L10 assume ~n < 1;#res := 0; 47453#fibo1FINAL assume true; 47443#fibo1EXIT >#50#return; 47442#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret10;havoc #t~ret9; 47439#fibo2FINAL assume true; 47438#fibo2EXIT >#52#return; 47183#L15-1 call #t~ret8 := fibo2(~n - 2);< 47437#fibo2ENTRY ~n := #in~n; 47296#L20 assume !(~n < 1); 47292#L22 assume !(1 == ~n); 47250#L25 call #t~ret9 := fibo1(~n - 1);< 47251#fibo1ENTRY ~n := #in~n; 47413#L10 assume !(~n < 1); 47411#L12 assume !(1 == ~n); 46984#L15 call #t~ret7 := fibo2(~n - 1);< 47409#fibo2ENTRY ~n := #in~n; 47418#L20 assume !(~n < 1); 48023#L22 assume !(1 == ~n); 46999#L25 [2020-10-19 20:08:16,003 INFO L796 eck$LassoCheckResult]: Loop: 46999#L25 call #t~ret9 := fibo1(~n - 1);< 48011#fibo1ENTRY ~n := #in~n; 48046#L10 assume !(~n < 1); 48045#L12 assume !(1 == ~n); 46934#L15 call #t~ret7 := fibo2(~n - 1);< 48044#fibo2ENTRY ~n := #in~n; 48043#L20 assume !(~n < 1); 48040#L22 assume !(1 == ~n); 48028#L25 call #t~ret9 := fibo1(~n - 1);< 48029#fibo1ENTRY ~n := #in~n; 48035#L10 assume !(~n < 1); 48033#L12 assume 1 == ~n;#res := 1; 48031#fibo1FINAL assume true; 48027#fibo1EXIT >#48#return; 47962#L25-1 call #t~ret10 := fibo1(~n - 2);< 47963#fibo1ENTRY ~n := #in~n; 48022#L10 assume ~n < 1;#res := 0; 48009#fibo1FINAL assume true; 48021#fibo1EXIT >#50#return; 46931#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret10;havoc #t~ret9; 46936#fibo2FINAL assume true; 46949#fibo2EXIT >#52#return; 46933#L15-1 call #t~ret8 := fibo2(~n - 2);< 48070#fibo2ENTRY ~n := #in~n; 48069#L20 assume !(~n < 1); 46948#L22 assume !(1 == ~n); 46944#L25 call #t~ret9 := fibo1(~n - 1);< 46980#fibo1ENTRY ~n := #in~n; 46943#L10 assume !(~n < 1); 46945#L12 assume !(1 == ~n); 46981#L15 call #t~ret7 := fibo2(~n - 1);< 46991#fibo2ENTRY ~n := #in~n; 47418#L20 assume !(~n < 1); 48023#L22 assume !(1 == ~n); 46999#L25 [2020-10-19 20:08:16,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:08:16,004 INFO L82 PathProgramCache]: Analyzing trace with hash -2135425092, now seen corresponding path program 1 times [2020-10-19 20:08:16,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 20:08:16,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753219965] [2020-10-19 20:08:16,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 20:08:16,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:16,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-19 20:08:16,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:16,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-19 20:08:16,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:16,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-19 20:08:16,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:16,160 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 38 proven. 42 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-19 20:08:16,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753219965] [2020-10-19 20:08:16,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265249471] [2020-10-19 20:08:16,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 20:08:16,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:16,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-19 20:08:16,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:16,287 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 38 proven. 42 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-19 20:08:16,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 20:08:16,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2020-10-19 20:08:16,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52187411] [2020-10-19 20:08:16,288 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-19 20:08:16,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:08:16,288 INFO L82 PathProgramCache]: Analyzing trace with hash 307692230, now seen corresponding path program 1 times [2020-10-19 20:08:16,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 20:08:16,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087817939] [2020-10-19 20:08:16,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 20:08:16,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:16,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-19 20:08:16,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:16,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-19 20:08:16,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:16,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-19 20:08:16,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:16,391 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-19 20:08:16,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087817939] [2020-10-19 20:08:16,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139286474] [2020-10-19 20:08:16,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 20:08:16,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:16,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-19 20:08:16,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:16,497 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 19 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-19 20:08:16,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 20:08:16,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 14 [2020-10-19 20:08:16,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442106930] [2020-10-19 20:08:16,498 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-10-19 20:08:16,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 20:08:16,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-19 20:08:16,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2020-10-19 20:08:16,499 INFO L87 Difference]: Start difference. First operand 1143 states and 1395 transitions. cyclomatic complexity: 264 Second operand 14 states. [2020-10-19 20:08:16,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 20:08:16,801 INFO L93 Difference]: Finished difference Result 962 states and 1134 transitions. [2020-10-19 20:08:16,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-19 20:08:16,802 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 962 states and 1134 transitions. [2020-10-19 20:08:16,808 INFO L131 ngComponentsAnalysis]: Automaton has 5 accepting balls. 144 [2020-10-19 20:08:16,815 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 962 states to 855 states and 1010 transitions. [2020-10-19 20:08:16,815 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 404 [2020-10-19 20:08:16,816 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 404 [2020-10-19 20:08:16,816 INFO L73 IsDeterministic]: Start isDeterministic. Operand 855 states and 1010 transitions. [2020-10-19 20:08:16,816 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 20:08:16,816 INFO L691 BuchiCegarLoop]: Abstraction has 855 states and 1010 transitions. [2020-10-19 20:08:16,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 855 states and 1010 transitions. [2020-10-19 20:08:16,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 855 to 809. [2020-10-19 20:08:16,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 809 states. [2020-10-19 20:08:16,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 809 states to 809 states and 955 transitions. [2020-10-19 20:08:16,834 INFO L714 BuchiCegarLoop]: Abstraction has 809 states and 955 transitions. [2020-10-19 20:08:16,834 INFO L594 BuchiCegarLoop]: Abstraction has 809 states and 955 transitions. [2020-10-19 20:08:16,834 INFO L427 BuchiCegarLoop]: ======== Iteration 12============ [2020-10-19 20:08:16,834 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 809 states and 955 transitions. [2020-10-19 20:08:16,837 INFO L131 ngComponentsAnalysis]: Automaton has 5 accepting balls. 144 [2020-10-19 20:08:16,837 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 20:08:16,837 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 20:08:16,838 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [6, 5, 5, 5, 5, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 20:08:16,838 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 20:08:16,838 INFO L794 eck$LassoCheckResult]: Stem: 49453#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(18);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 49449#L-1 havoc main_#res;havoc main_#t~ret11, main_~x~0, main_~result~0;main_~x~0 := 8; 49421#L39 call main_#t~ret11 := fibo1(main_~x~0);< 49422#fibo1ENTRY ~n := #in~n; 49545#L10 assume !(~n < 1); 49544#L12 assume !(1 == ~n); 49535#L15 call #t~ret7 := fibo2(~n - 1);< 49541#fibo2ENTRY ~n := #in~n; 49539#L20 assume !(~n < 1); 49537#L22 assume !(1 == ~n); 49529#L25 call #t~ret9 := fibo1(~n - 1);< 49533#fibo1ENTRY ~n := #in~n; 49531#L10 assume !(~n < 1); 49530#L12 assume !(1 == ~n); 49515#L15 call #t~ret7 := fibo2(~n - 1);< 49524#fibo2ENTRY ~n := #in~n; 49522#L20 assume !(~n < 1); 49516#L22 assume !(1 == ~n); 49493#L25 call #t~ret9 := fibo1(~n - 1);< 49494#fibo1ENTRY ~n := #in~n; 49514#L10 assume !(~n < 1); 49513#L12 assume !(1 == ~n); 49488#L15 call #t~ret7 := fibo2(~n - 1);< 49510#fibo2ENTRY ~n := #in~n; 49504#L20 assume !(~n < 1); 49499#L22 assume !(1 == ~n); 49492#L25 call #t~ret9 := fibo1(~n - 1);< 49494#fibo1ENTRY ~n := #in~n; 49512#L10 assume !(~n < 1); 49511#L12 assume !(1 == ~n); 49508#L15 call #t~ret7 := fibo2(~n - 1);< 49509#fibo2ENTRY ~n := #in~n; 49540#L20 assume !(~n < 1); 49538#L22 assume 1 == ~n;#res := 1; 49521#fibo2FINAL assume true; 49507#fibo2EXIT >#52#return; 49502#L15-1 call #t~ret8 := fibo2(~n - 2);< 49503#fibo2ENTRY ~n := #in~n; 49520#L20 assume ~n < 1;#res := 0; 49506#fibo2FINAL assume true; 49501#fibo2EXIT >#54#return; 49498#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 49497#fibo1FINAL assume true; 49491#fibo1EXIT >#48#return; 49482#L25-1 call #t~ret10 := fibo1(~n - 2);< 49490#fibo1ENTRY ~n := #in~n; 49894#L10 assume !(~n < 1); 49893#L12 assume !(1 == ~n); 49436#L15 call #t~ret7 := fibo2(~n - 1);< 49891#fibo2ENTRY ~n := #in~n; 49902#L20 assume !(~n < 1); 49900#L22 assume !(1 == ~n); 49397#L25 [2020-10-19 20:08:16,839 INFO L796 eck$LassoCheckResult]: Loop: 49397#L25 call #t~ret9 := fibo1(~n - 1);< 49437#fibo1ENTRY ~n := #in~n; 49396#L10 assume !(~n < 1); 49398#L12 assume !(1 == ~n); 49432#L15 call #t~ret7 := fibo2(~n - 1);< 49451#fibo2ENTRY ~n := #in~n; 49454#L20 assume !(~n < 1); 49475#L22 assume !(1 == ~n); 49397#L25 [2020-10-19 20:08:16,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:08:16,839 INFO L82 PathProgramCache]: Analyzing trace with hash 1830537364, now seen corresponding path program 2 times [2020-10-19 20:08:16,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 20:08:16,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798425157] [2020-10-19 20:08:16,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 20:08:16,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:16,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-19 20:08:16,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:16,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-19 20:08:16,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:16,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-19 20:08:16,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:16,997 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 54 proven. 27 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-19 20:08:16,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798425157] [2020-10-19 20:08:16,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827305391] [2020-10-19 20:08:16,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 20:08:17,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-19 20:08:17,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 20:08:17,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-19 20:08:17,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:17,089 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 54 proven. 27 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-19 20:08:17,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 20:08:17,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 20 [2020-10-19 20:08:17,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816518915] [2020-10-19 20:08:17,090 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-19 20:08:17,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:08:17,090 INFO L82 PathProgramCache]: Analyzing trace with hash -2095272006, now seen corresponding path program 3 times [2020-10-19 20:08:17,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 20:08:17,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75882782] [2020-10-19 20:08:17,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 20:08:17,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 20:08:17,093 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 20:08:17,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 20:08:17,094 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 20:08:17,094 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 20:08:17,181 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 20:08:17,181 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 20:08:17,181 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 20:08:17,181 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 20:08:17,181 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-19 20:08:17,181 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:17,181 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 20:08:17,181 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 20:08:17,181 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_8-2.c_Iteration12_Loop [2020-10-19 20:08:17,182 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 20:08:17,182 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 20:08:17,182 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:08:17,184 INFO 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 20:08:17,191 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:08:17,199 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:08:17,201 INFO 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 20:08:17,204 INFO 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 20:08:17,206 INFO 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 20:08:17,208 INFO 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 20:08:17,218 INFO 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 20:08:17,280 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 20:08:17,280 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 20:08:17,288 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:08:17,288 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 105 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:17,292 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 20:08:17,292 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_~n=0} Honda state: {fibo1_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:17,320 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:08:17,320 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:17,348 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-19 20:08:17,348 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 20:08:22,937 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-19 20:08:22,939 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 20:08:22,939 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 20:08:22,939 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 20:08:22,939 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 20:08:22,939 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-19 20:08:22,939 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:22,940 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 20:08:22,940 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 20:08:22,940 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_8-2.c_Iteration12_Loop [2020-10-19 20:08:22,940 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 20:08:22,940 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 20:08:22,941 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:08:22,943 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:08:22,944 INFO 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 20:08:22,950 INFO 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 20:08:22,951 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:08:22,959 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:08:22,963 INFO 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 20:08:22,964 INFO 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 20:08:22,966 INFO 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 20:08:23,041 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 20:08:23,042 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:23,044 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 20:08:23,045 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:08:23,045 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:08:23,045 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:08:23,046 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:08:23,046 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:08:23,046 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:08:23,046 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:08:23,047 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:23,070 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 20:08:23,071 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:08:23,072 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:08:23,072 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:08:23,072 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:08:23,072 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:08:23,072 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:08:23,072 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:08:23,074 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:23,097 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 20:08:23,098 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:08:23,098 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:08:23,098 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:08:23,098 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:08:23,098 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:08:23,099 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:08:23,099 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:08:23,100 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:23,124 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 20:08:23,125 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:08:23,125 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:08:23,125 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:08:23,126 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:08:23,126 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:08:23,126 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:08:23,126 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:08:23,128 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:23,150 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 20:08:23,151 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:08:23,151 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:08:23,151 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:08:23,151 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:08:23,151 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:08:23,151 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:08:23,151 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:08:23,153 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:23,174 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 20:08:23,175 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:08:23,175 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:08:23,176 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:08:23,176 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:08:23,176 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:08:23,176 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:08:23,176 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:08:23,180 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:23,201 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 20:08:23,202 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:08:23,202 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:08:23,203 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:08:23,203 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:08:23,203 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:08:23,203 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:08:23,203 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:08:23,204 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:23,225 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 20:08:23,226 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:08:23,226 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:08:23,227 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:08:23,227 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:08:23,227 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:08:23,227 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:08:23,227 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:08:23,228 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:23,252 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 20:08:23,253 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:08:23,253 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:08:23,253 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:08:23,253 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:08:23,253 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:08:23,254 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:08:23,254 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:08:23,257 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-19 20:08:23,259 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2020-10-19 20:08:23,259 INFO L444 ModelExtractionUtils]: 2 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:23,262 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-19 20:08:23,262 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-19 20:08:23,262 INFO L510 LassoAnalysis]: Proved termination. [2020-10-19 20:08:23,263 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo2_~n) = 1*fibo2_~n Supporting invariants [] [2020-10-19 20:08:23,282 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-19 20:08:23,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:08:23,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:23,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-19 20:08:23,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:23,381 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:08:23,382 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:08:23,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:23,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-19 20:08:23,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:23,458 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 20:08:23,459 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 20:08:23,459 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 809 states and 955 transitions. cyclomatic complexity: 155 Second operand 8 states. [2020-10-19 20:08:23,586 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 809 states and 955 transitions. cyclomatic complexity: 155. Second operand 8 states. Result 830 states and 977 transitions. Complement of second has 20 states. [2020-10-19 20:08:23,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 8 states 2 stem states 5 non-accepting loop states 1 accepting loop states [2020-10-19 20:08:23,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-19 20:08:23,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 21 transitions. [2020-10-19 20:08:23,588 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 21 transitions. Stem has 52 letters. Loop has 8 letters. [2020-10-19 20:08:23,589 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:08:23,589 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-19 20:08:23,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:08:23,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:23,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-19 20:08:23,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:23,674 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:08:23,676 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:08:23,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:23,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-19 20:08:23,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:23,743 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 20:08:23,744 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 20:08:23,744 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 809 states and 955 transitions. cyclomatic complexity: 155 Second operand 8 states. [2020-10-19 20:08:23,914 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 809 states and 955 transitions. cyclomatic complexity: 155. Second operand 8 states. Result 836 states and 983 transitions. Complement of second has 22 states. [2020-10-19 20:08:23,914 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 20:08:23,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-19 20:08:23,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 24 transitions. [2020-10-19 20:08:23,916 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 24 transitions. Stem has 52 letters. Loop has 8 letters. [2020-10-19 20:08:23,916 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:08:23,916 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-19 20:08:23,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:08:23,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:24,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 24 conjunts are in the unsatisfiable core [2020-10-19 20:08:24,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:24,036 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:08:24,038 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:08:24,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:24,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-19 20:08:24,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:24,116 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 20:08:24,117 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 20:08:24,117 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 809 states and 955 transitions. cyclomatic complexity: 155 Second operand 8 states. [2020-10-19 20:08:24,278 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 809 states and 955 transitions. cyclomatic complexity: 155. Second operand 8 states. Result 1195 states and 1399 transitions. Complement of second has 32 states. [2020-10-19 20:08:24,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 8 states 2 stem states 5 non-accepting loop states 1 accepting loop states [2020-10-19 20:08:24,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-19 20:08:24,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 43 transitions. [2020-10-19 20:08:24,279 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 43 transitions. Stem has 52 letters. Loop has 8 letters. [2020-10-19 20:08:24,280 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:08:24,280 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 43 transitions. Stem has 60 letters. Loop has 8 letters. [2020-10-19 20:08:24,280 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:08:24,280 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 43 transitions. Stem has 52 letters. Loop has 16 letters. [2020-10-19 20:08:24,283 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:08:24,283 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1195 states and 1399 transitions. [2020-10-19 20:08:24,291 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 156 [2020-10-19 20:08:24,299 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1195 states to 848 states and 1007 transitions. [2020-10-19 20:08:24,299 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 346 [2020-10-19 20:08:24,300 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 378 [2020-10-19 20:08:24,300 INFO L73 IsDeterministic]: Start isDeterministic. Operand 848 states and 1007 transitions. [2020-10-19 20:08:24,301 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 20:08:24,301 INFO L691 BuchiCegarLoop]: Abstraction has 848 states and 1007 transitions. [2020-10-19 20:08:24,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 848 states and 1007 transitions. [2020-10-19 20:08:24,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 848 to 816. [2020-10-19 20:08:24,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 816 states. [2020-10-19 20:08:24,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 816 states to 816 states and 960 transitions. [2020-10-19 20:08:24,320 INFO L714 BuchiCegarLoop]: Abstraction has 816 states and 960 transitions. [2020-10-19 20:08:24,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 20:08:24,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-19 20:08:24,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2020-10-19 20:08:24,320 INFO L87 Difference]: Start difference. First operand 816 states and 960 transitions. Second operand 20 states. [2020-10-19 20:08:24,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 20:08:24,787 INFO L93 Difference]: Finished difference Result 599 states and 699 transitions. [2020-10-19 20:08:24,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-19 20:08:24,787 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 599 states and 699 transitions. [2020-10-19 20:08:24,791 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 21 [2020-10-19 20:08:24,795 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 599 states to 585 states and 682 transitions. [2020-10-19 20:08:24,795 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 297 [2020-10-19 20:08:24,796 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 311 [2020-10-19 20:08:24,796 INFO L73 IsDeterministic]: Start isDeterministic. Operand 585 states and 682 transitions. [2020-10-19 20:08:24,796 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 20:08:24,796 INFO L691 BuchiCegarLoop]: Abstraction has 585 states and 682 transitions. [2020-10-19 20:08:24,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states and 682 transitions. [2020-10-19 20:08:24,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 571. [2020-10-19 20:08:24,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 571 states. [2020-10-19 20:08:24,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 667 transitions. [2020-10-19 20:08:24,809 INFO L714 BuchiCegarLoop]: Abstraction has 571 states and 667 transitions. [2020-10-19 20:08:24,809 INFO L594 BuchiCegarLoop]: Abstraction has 571 states and 667 transitions. [2020-10-19 20:08:24,809 INFO L427 BuchiCegarLoop]: ======== Iteration 13============ [2020-10-19 20:08:24,809 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 571 states and 667 transitions. [2020-10-19 20:08:24,811 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 21 [2020-10-19 20:08:24,812 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 20:08:24,812 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 20:08:24,813 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [7, 7, 7, 6, 6, 5, 5, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 20:08:24,813 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 20:08:24,813 INFO L794 eck$LassoCheckResult]: Stem: 55437#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(18);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 55433#L-1 havoc main_#res;havoc main_#t~ret11, main_~x~0, main_~result~0;main_~x~0 := 8; 55405#L39 call main_#t~ret11 := fibo1(main_~x~0);< 55406#fibo1ENTRY ~n := #in~n; 55498#L10 assume !(~n < 1); 55496#L12 assume !(1 == ~n); 55489#L15 call #t~ret7 := fibo2(~n - 1);< 55495#fibo2ENTRY ~n := #in~n; 55523#L20 assume !(~n < 1); 55522#L22 assume !(1 == ~n); 55488#L25 call #t~ret9 := fibo1(~n - 1);< 55490#fibo1ENTRY ~n := #in~n; 55882#L10 assume !(~n < 1); 55877#L12 assume !(1 == ~n); 55375#L15 call #t~ret7 := fibo2(~n - 1);< 55564#fibo2ENTRY ~n := #in~n; 55812#L20 assume !(~n < 1); 55811#L22 assume !(1 == ~n); 55548#L25 call #t~ret9 := fibo1(~n - 1);< 55550#fibo1ENTRY ~n := #in~n; 55595#L10 assume !(~n < 1); 55593#L12 assume !(1 == ~n); 55586#L15 call #t~ret7 := fibo2(~n - 1);< 55587#fibo2ENTRY ~n := #in~n; 55658#L20 assume !(~n < 1); 55653#L22 assume !(1 == ~n); 55549#L25 call #t~ret9 := fibo1(~n - 1);< 55550#fibo1ENTRY ~n := #in~n; 55599#L10 assume !(~n < 1); 55698#L12 assume !(1 == ~n); 55649#L15 call #t~ret7 := fibo2(~n - 1);< 55650#fibo2ENTRY ~n := #in~n; 55657#L20 assume !(~n < 1); 55652#L22 assume 1 == ~n;#res := 1; 55651#fibo2FINAL assume true; 55648#fibo2EXIT >#52#return; 55645#L15-1 call #t~ret8 := fibo2(~n - 2);< 55646#fibo2ENTRY ~n := #in~n; 55682#L20 assume ~n < 1;#res := 0; 55656#fibo2FINAL assume true; 55644#fibo2EXIT >#54#return; 55642#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 55641#fibo1FINAL assume true; 55631#fibo1EXIT >#48#return; 55597#L25-1 call #t~ret10 := fibo1(~n - 2);< 55598#fibo1ENTRY ~n := #in~n; 55634#L10 assume !(~n < 1); 55632#L12 assume 1 == ~n;#res := 1; 55628#fibo1FINAL assume true; 55596#fibo1EXIT >#50#return; 55594#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret10;havoc #t~ret9; 55592#fibo2FINAL assume true; 55585#fibo2EXIT >#52#return; 55426#L15-1 call #t~ret8 := fibo2(~n - 2);< 55579#fibo2ENTRY ~n := #in~n; 55578#L20 assume !(~n < 1); 55577#L22 assume !(1 == ~n); 55542#L25 call #t~ret9 := fibo1(~n - 1);< 55544#fibo1ENTRY ~n := #in~n; 55667#L10 assume !(~n < 1); 55662#L12 assume !(1 == ~n); 55655#L15 call #t~ret7 := fibo2(~n - 1);< 55660#fibo2ENTRY ~n := #in~n; 55743#L20 assume !(~n < 1); 55741#L22 assume !(1 == ~n); 55601#L25 call #t~ret9 := fibo1(~n - 1);< 55610#fibo1ENTRY ~n := #in~n; 55671#L10 assume !(~n < 1); 55670#L12 assume !(1 == ~n); 55416#L15 [2020-10-19 20:08:24,813 INFO L796 eck$LassoCheckResult]: Loop: 55416#L15 call #t~ret7 := fibo2(~n - 1);< 55669#fibo2ENTRY ~n := #in~n; 55678#L20 assume !(~n < 1); 55788#L22 assume !(1 == ~n); 55602#L25 call #t~ret9 := fibo1(~n - 1);< 55610#fibo1ENTRY ~n := #in~n; 55671#L10 assume !(~n < 1); 55670#L12 assume !(1 == ~n); 55416#L15 [2020-10-19 20:08:24,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:08:24,814 INFO L82 PathProgramCache]: Analyzing trace with hash 265386094, now seen corresponding path program 2 times [2020-10-19 20:08:24,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 20:08:24,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974068258] [2020-10-19 20:08:24,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 20:08:24,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:24,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-19 20:08:24,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:24,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-19 20:08:24,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:24,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-19 20:08:24,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:24,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-19 20:08:24,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:24,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-19 20:08:24,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:24,990 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 92 proven. 39 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-19 20:08:24,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974068258] [2020-10-19 20:08:24,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408320123] [2020-10-19 20:08:24,991 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 20:08:25,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-19 20:08:25,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 20:08:25,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-19 20:08:25,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:25,099 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 92 proven. 39 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-19 20:08:25,099 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 20:08:25,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 20 [2020-10-19 20:08:25,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776254820] [2020-10-19 20:08:25,100 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-19 20:08:25,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:08:25,100 INFO L82 PathProgramCache]: Analyzing trace with hash 1544065082, now seen corresponding path program 4 times [2020-10-19 20:08:25,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 20:08:25,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212125840] [2020-10-19 20:08:25,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 20:08:25,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 20:08:25,103 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 20:08:25,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 20:08:25,104 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 20:08:25,105 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 20:08:25,232 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 20:08:25,232 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 20:08:25,232 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 20:08:25,233 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 20:08:25,233 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-19 20:08:25,233 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:25,233 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 20:08:25,233 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 20:08:25,233 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_8-2.c_Iteration13_Loop [2020-10-19 20:08:25,233 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 20:08:25,234 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 20:08:25,235 INFO 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 20:08:25,249 INFO 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 20:08:25,252 INFO 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 20:08:25,254 INFO 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 20:08:25,257 INFO 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 20:08:25,260 INFO 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 20:08:25,262 INFO 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 20:08:25,265 INFO 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 20:08:25,268 INFO 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 20:08:25,353 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 20:08:25,353 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 20:08:25,362 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:08:25,362 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 119 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 120 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 20:08:25,430 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-19 20:08:25,430 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 120 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:26,777 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-19 20:08:26,779 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 20:08:26,779 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 20:08:26,779 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 20:08:26,779 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 20:08:26,779 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-19 20:08:26,779 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:26,779 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 20:08:26,779 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 20:08:26,779 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_8-2.c_Iteration13_Loop [2020-10-19 20:08:26,779 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 20:08:26,780 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 20:08:26,780 INFO 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 20:08:26,782 INFO 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 20:08:26,784 INFO 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 20:08:26,787 INFO 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 20:08:26,789 INFO 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 20:08:26,791 INFO 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 20:08:26,793 INFO 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 20:08:26,798 INFO 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 20:08:26,799 INFO 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 20:08:26,885 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 20:08:26,886 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:26,888 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 20:08:26,889 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:08:26,889 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:08:26,889 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:08:26,890 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:08:26,890 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:08:26,890 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:08:26,890 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:08:26,891 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:26,915 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 20:08:26,916 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:08:26,916 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:08:26,916 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:08:26,916 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:08:26,916 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:08:26,917 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:08:26,917 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:08:26,918 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:26,941 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 20:08:26,942 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:08:26,942 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:08:26,943 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:08:26,943 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:08:26,943 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:08:26,943 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:08:26,943 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:08:26,945 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:26,973 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 20:08:26,974 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:08:26,974 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:08:26,974 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:08:26,975 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:08:26,975 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:08:26,975 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:08:26,975 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:08:26,976 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 125 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:26,999 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-19 20:08:27,001 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:08:27,001 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:08:27,001 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:08:27,001 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:08:27,001 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:08:27,001 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:08:27,001 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:08:27,003 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:27,027 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 20:08:27,029 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:08:27,029 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:08:27,029 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:08:27,029 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:08:27,029 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:08:27,029 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:08:27,029 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:08:27,031 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:27,054 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 20:08:27,055 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:08:27,056 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:08:27,056 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:08:27,056 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:08:27,056 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:08:27,056 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:08:27,056 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:08:27,057 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:27,084 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 20:08:27,085 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:08:27,085 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:08:27,085 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:08:27,085 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:08:27,085 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:08:27,086 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:08:27,086 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:08:27,087 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:27,117 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 20:08:27,119 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:08:27,119 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:08:27,119 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:08:27,119 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:08:27,119 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:08:27,120 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:08:27,120 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:08:27,122 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-19 20:08:27,126 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-19 20:08:27,126 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:27,129 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-19 20:08:27,129 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-19 20:08:27,129 INFO L510 LassoAnalysis]: Proved termination. [2020-10-19 20:08:27,129 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo1_~n) = 1*fibo1_~n Supporting invariants [] [2020-10-19 20:08:27,149 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-19 20:08:27,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:08:27,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:27,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-19 20:08:27,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:27,266 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:08:27,271 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:08:27,273 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:08:27,277 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:08:27,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:27,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-19 20:08:27,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:27,355 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 20:08:27,356 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 20:08:27,356 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 571 states and 667 transitions. cyclomatic complexity: 102 Second operand 8 states. [2020-10-19 20:08:27,476 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 571 states and 667 transitions. cyclomatic complexity: 102. Second operand 8 states. Result 601 states and 698 transitions. Complement of second has 19 states. [2020-10-19 20:08:27,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 8 states 2 stem states 5 non-accepting loop states 1 accepting loop states [2020-10-19 20:08:27,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-19 20:08:27,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 20 transitions. [2020-10-19 20:08:27,478 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 20 transitions. Stem has 69 letters. Loop has 8 letters. [2020-10-19 20:08:27,478 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:08:27,478 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-19 20:08:27,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:08:27,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:27,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-19 20:08:27,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:27,625 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:08:27,628 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:08:27,630 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:08:27,632 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:08:27,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:27,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-19 20:08:27,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:27,714 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 20:08:27,715 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 20:08:27,715 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 571 states and 667 transitions. cyclomatic complexity: 102 Second operand 8 states. [2020-10-19 20:08:27,872 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 571 states and 667 transitions. cyclomatic complexity: 102. Second operand 8 states. Result 601 states and 698 transitions. Complement of second has 21 states. [2020-10-19 20:08:27,873 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 20:08:27,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-19 20:08:27,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 19 transitions. [2020-10-19 20:08:27,875 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 19 transitions. Stem has 69 letters. Loop has 8 letters. [2020-10-19 20:08:27,876 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:08:27,876 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-19 20:08:27,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:08:27,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:27,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 30 conjunts are in the unsatisfiable core [2020-10-19 20:08:27,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:27,973 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:08:27,974 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:08:27,979 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:08:27,980 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:08:27,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:27,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-19 20:08:27,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:28,056 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 20:08:28,057 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 20:08:28,057 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 571 states and 667 transitions. cyclomatic complexity: 102 Second operand 8 states. [2020-10-19 20:08:28,231 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 571 states and 667 transitions. cyclomatic complexity: 102. Second operand 8 states. Result 867 states and 975 transitions. Complement of second has 33 states. [2020-10-19 20:08:28,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 8 states 2 stem states 5 non-accepting loop states 1 accepting loop states [2020-10-19 20:08:28,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-19 20:08:28,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 43 transitions. [2020-10-19 20:08:28,233 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 43 transitions. Stem has 69 letters. Loop has 8 letters. [2020-10-19 20:08:28,234 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:08:28,234 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 43 transitions. Stem has 77 letters. Loop has 8 letters. [2020-10-19 20:08:28,234 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:08:28,234 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 43 transitions. Stem has 69 letters. Loop has 16 letters. [2020-10-19 20:08:28,235 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:08:28,235 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 867 states and 975 transitions. [2020-10-19 20:08:28,240 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 21 [2020-10-19 20:08:28,244 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 867 states to 598 states and 691 transitions. [2020-10-19 20:08:28,245 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 281 [2020-10-19 20:08:28,245 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 311 [2020-10-19 20:08:28,245 INFO L73 IsDeterministic]: Start isDeterministic. Operand 598 states and 691 transitions. [2020-10-19 20:08:28,245 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 20:08:28,245 INFO L691 BuchiCegarLoop]: Abstraction has 598 states and 691 transitions. [2020-10-19 20:08:28,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states and 691 transitions. [2020-10-19 20:08:28,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 591. [2020-10-19 20:08:28,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 591 states. [2020-10-19 20:08:28,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 683 transitions. [2020-10-19 20:08:28,258 INFO L714 BuchiCegarLoop]: Abstraction has 591 states and 683 transitions. [2020-10-19 20:08:28,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 20:08:28,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-19 20:08:28,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2020-10-19 20:08:28,259 INFO L87 Difference]: Start difference. First operand 591 states and 683 transitions. Second operand 20 states. [2020-10-19 20:08:28,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 20:08:28,639 INFO L93 Difference]: Finished difference Result 605 states and 685 transitions. [2020-10-19 20:08:28,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-19 20:08:28,640 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 605 states and 685 transitions. [2020-10-19 20:08:28,643 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-10-19 20:08:28,644 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 605 states to 0 states and 0 transitions. [2020-10-19 20:08:28,644 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2020-10-19 20:08:28,644 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2020-10-19 20:08:28,644 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2020-10-19 20:08:28,644 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-19 20:08:28,644 INFO L691 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-19 20:08:28,644 INFO L714 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-19 20:08:28,644 INFO L594 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-19 20:08:28,644 INFO L427 BuchiCegarLoop]: ======== Iteration 14============ [2020-10-19 20:08:28,644 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2020-10-19 20:08:28,644 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-10-19 20:08:28,645 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2020-10-19 20:08:28,651 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 19.10 08:08:28 BoogieIcfgContainer [2020-10-19 20:08:28,652 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2020-10-19 20:08:28,652 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-19 20:08:28,652 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-19 20:08:28,652 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-19 20:08:28,653 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 08:07:52" (3/4) ... [2020-10-19 20:08:28,657 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-10-19 20:08:28,657 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-19 20:08:28,659 INFO L168 Benchmark]: Toolchain (without parser) took 37314.67 ms. Allocated memory was 1.0 GB in the beginning and 1.5 GB in the end (delta: 511.2 MB). Free memory was 958.6 MB in the beginning and 1.3 GB in the end (delta: -346.4 MB). Peak memory consumption was 164.8 MB. Max. memory is 11.5 GB. [2020-10-19 20:08:28,659 INFO L168 Benchmark]: CDTParser took 0.36 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 20:08:28,660 INFO L168 Benchmark]: CACSL2BoogieTranslator took 377.27 ms. Allocated memory is still 1.0 GB. Free memory was 958.6 MB in the beginning and 947.9 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2020-10-19 20:08:28,661 INFO L168 Benchmark]: Boogie Procedure Inliner took 114.14 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 94.9 MB). Free memory was 947.9 MB in the beginning and 1.1 GB in the end (delta: -136.0 MB). Peak memory consumption was 15.2 MB. Max. memory is 11.5 GB. [2020-10-19 20:08:28,661 INFO L168 Benchmark]: Boogie Preprocessor took 23.11 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.8 MB). Peak memory consumption was 6.8 MB. Max. memory is 11.5 GB. [2020-10-19 20:08:28,661 INFO L168 Benchmark]: RCFGBuilder took 301.92 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 19.1 MB). Peak memory consumption was 19.1 MB. Max. memory is 11.5 GB. [2020-10-19 20:08:28,662 INFO L168 Benchmark]: BuchiAutomizer took 36481.40 ms. Allocated memory was 1.1 GB in the beginning and 1.5 GB in the end (delta: 416.3 MB). Free memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: -247.0 MB). Peak memory consumption was 169.2 MB. Max. memory is 11.5 GB. [2020-10-19 20:08:28,662 INFO L168 Benchmark]: Witness Printer took 4.84 ms. Allocated memory is still 1.5 GB. Free memory is still 1.3 GB. There was no memory consumed. Max. memory is 11.5 GB. [2020-10-19 20:08:28,664 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36 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 377.27 ms. Allocated memory is still 1.0 GB. Free memory was 958.6 MB in the beginning and 947.9 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 114.14 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 94.9 MB). Free memory was 947.9 MB in the beginning and 1.1 GB in the end (delta: -136.0 MB). Peak memory consumption was 15.2 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 23.11 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 6.8 MB). Peak memory consumption was 6.8 MB. Max. memory is 11.5 GB. * RCFGBuilder took 301.92 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 19.1 MB). Peak memory consumption was 19.1 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 36481.40 ms. Allocated memory was 1.1 GB in the beginning and 1.5 GB in the end (delta: 416.3 MB). Free memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: -247.0 MB). Peak memory consumption was 169.2 MB. Max. memory is 11.5 GB. * Witness Printer took 4.84 ms. Allocated memory is still 1.5 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 20 terminating modules (12 trivial, 3 deterministic, 5 nondeterministic). One deterministic module has affine ranking function \old(n) and consists of 7 locations. One deterministic module has affine ranking function n and consists of 12 locations. One deterministic module has affine ranking function n and consists of 12 locations. One nondeterministic module has affine ranking function \old(n) and consists of 8 locations. One nondeterministic module has affine ranking function n and consists of 12 locations. One nondeterministic module has affine ranking function \old(n) and consists of 11 locations. One nondeterministic module has affine ranking function n and consists of 8 locations. One nondeterministic module has affine ranking function n and consists of 8 locations. 12 modules have a trivial ranking function, the largest among these consists of 24 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 36.4s and 14 iterations. TraceHistogramMax:10. Analysis of lassos took 20.5s. Construction of modules took 4.2s. Büchi inclusion checks took 10.0s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 19. Automata minimization 0.6s AutomataMinimizationTime, 19 MinimizatonAttempts, 1733 StatesRemovedByMinimization, 19 NontrivialMinimizations. Non-live state removal took 0.5s Buchi closure took 0.0s. Biggest automaton had 3231 states and ocurred in iteration 7. Nontrivial modules had stage [3, 0, 4, 1, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 1/22 HoareTripleCheckerStatistics: 726 SDtfs, 1830 SDslu, 2110 SDs, 0 SdLazy, 5154 SolverSat, 1072 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.2s Time LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT1 conc0 concLT0 SILN0 SILU0 SILI5 SILT7 lasso0 LassoPreprocessingBenchmarks: Lassos: inital21 mio100 ax100 hnf82 lsp92 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq188 hnf93 smp75 dnf100 smp100 tf109 neg96 sie107 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 25ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 33 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 8 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 9.8s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...