./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/recursive-simple/fibo_7-1.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_7-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(F end) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c81a149fe338374de067d63dbdea0d00d3f8a8fa ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-906a4fb [2020-10-19 20:08:09,968 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-19 20:08:09,971 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-19 20:08:09,997 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-19 20:08:09,998 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-19 20:08:09,999 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-19 20:08:10,001 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-19 20:08:10,003 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-19 20:08:10,005 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-19 20:08:10,006 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-19 20:08:10,008 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-19 20:08:10,009 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-19 20:08:10,009 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-19 20:08:10,011 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-19 20:08:10,012 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-19 20:08:10,013 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-19 20:08:10,014 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-19 20:08:10,015 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-19 20:08:10,017 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-19 20:08:10,019 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-19 20:08:10,021 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-19 20:08:10,022 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-19 20:08:10,023 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-19 20:08:10,024 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-19 20:08:10,027 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-19 20:08:10,027 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-19 20:08:10,028 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-19 20:08:10,029 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-19 20:08:10,029 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-19 20:08:10,030 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-19 20:08:10,031 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-19 20:08:10,031 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-19 20:08:10,032 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-19 20:08:10,033 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-19 20:08:10,034 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-19 20:08:10,035 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-19 20:08:10,035 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-19 20:08:10,036 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-19 20:08:10,036 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-19 20:08:10,037 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-19 20:08:10,038 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-19 20:08:10,039 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-32bit-Automizer_Default.epf [2020-10-19 20:08:10,078 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-19 20:08:10,080 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-19 20:08:10,082 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-19 20:08:10,083 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-19 20:08:10,085 INFO L138 SettingsManager]: * Use SBE=true [2020-10-19 20:08:10,086 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2020-10-19 20:08:10,086 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2020-10-19 20:08:10,086 INFO L138 SettingsManager]: * Use old map elimination=false [2020-10-19 20:08:10,086 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2020-10-19 20:08:10,087 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2020-10-19 20:08:10,088 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2020-10-19 20:08:10,088 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-19 20:08:10,089 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-19 20:08:10,089 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-10-19 20:08:10,090 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-19 20:08:10,090 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-19 20:08:10,091 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-19 20:08:10,091 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2020-10-19 20:08:10,093 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2020-10-19 20:08:10,093 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2020-10-19 20:08:10,093 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-19 20:08:10,094 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-19 20:08:10,094 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2020-10-19 20:08:10,094 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-19 20:08:10,095 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2020-10-19 20:08:10,095 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-19 20:08:10,095 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-19 20:08:10,096 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2020-10-19 20:08:10,096 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-19 20:08:10,097 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-19 20:08:10,097 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-19 20:08:10,097 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2020-10-19 20:08:10,098 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2020-10-19 20:08:10,099 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 -> c81a149fe338374de067d63dbdea0d00d3f8a8fa [2020-10-19 20:08:10,442 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-19 20:08:10,456 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-19 20:08:10,460 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-19 20:08:10,462 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-19 20:08:10,462 INFO L275 PluginConnector]: CDTParser initialized [2020-10-19 20:08:10,463 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/fibo_7-1.c [2020-10-19 20:08:10,539 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1be0ea980/07a91772f6bf4acea155aafe97c3c873/FLAGa4938d731 [2020-10-19 20:08:11,014 INFO L306 CDTParser]: Found 1 translation units. [2020-10-19 20:08:11,014 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_7-1.c [2020-10-19 20:08:11,020 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1be0ea980/07a91772f6bf4acea155aafe97c3c873/FLAGa4938d731 [2020-10-19 20:08:11,365 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1be0ea980/07a91772f6bf4acea155aafe97c3c873 [2020-10-19 20:08:11,369 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-19 20:08:11,377 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-19 20:08:11,378 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-19 20:08:11,378 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-19 20:08:11,382 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-19 20:08:11,383 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 08:08:11" (1/1) ... [2020-10-19 20:08:11,387 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@271fb956 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 08:08:11, skipping insertion in model container [2020-10-19 20:08:11,387 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 08:08:11" (1/1) ... [2020-10-19 20:08:11,395 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-19 20:08:11,415 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-19 20:08:11,590 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 20:08:11,606 INFO L203 MainTranslator]: Completed pre-run [2020-10-19 20:08:11,620 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 20:08:11,634 INFO L208 MainTranslator]: Completed translation [2020-10-19 20:08:11,635 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 08:08:11 WrapperNode [2020-10-19 20:08:11,635 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-19 20:08:11,636 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-19 20:08:11,636 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-19 20:08:11,636 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-19 20:08:11,643 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 08:08:11" (1/1) ... [2020-10-19 20:08:11,651 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 08:08:11" (1/1) ... [2020-10-19 20:08:11,671 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-19 20:08:11,671 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-19 20:08:11,672 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-19 20:08:11,672 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-19 20:08:11,743 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 08:08:11" (1/1) ... [2020-10-19 20:08:11,743 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 08:08:11" (1/1) ... [2020-10-19 20:08:11,745 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 08:08:11" (1/1) ... [2020-10-19 20:08:11,745 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 08:08:11" (1/1) ... [2020-10-19 20:08:11,748 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 08:08:11" (1/1) ... [2020-10-19 20:08:11,750 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 08:08:11" (1/1) ... [2020-10-19 20:08:11,751 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 08:08:11" (1/1) ... [2020-10-19 20:08:11,753 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-19 20:08:11,753 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-19 20:08:11,753 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-19 20:08:11,754 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-19 20:08:11,755 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 08:08:11" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:11,815 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-19 20:08:11,815 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-19 20:08:11,815 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-19 20:08:11,815 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-19 20:08:11,816 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2020-10-19 20:08:11,816 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2020-10-19 20:08:12,029 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-19 20:08:12,030 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-19 20:08:12,031 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 08:08:12 BoogieIcfgContainer [2020-10-19 20:08:12,032 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-19 20:08:12,033 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2020-10-19 20:08:12,033 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2020-10-19 20:08:12,037 INFO L275 PluginConnector]: BuchiAutomizer initialized [2020-10-19 20:08:12,038 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-19 20:08:12,038 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 19.10 08:08:11" (1/3) ... [2020-10-19 20:08:12,039 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@1d90b851 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 19.10 08:08:12, skipping insertion in model container [2020-10-19 20:08:12,040 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-19 20:08:12,040 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 08:08:11" (2/3) ... [2020-10-19 20:08:12,040 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@1d90b851 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 19.10 08:08:12, skipping insertion in model container [2020-10-19 20:08:12,041 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-19 20:08:12,041 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 08:08:12" (3/3) ... [2020-10-19 20:08:12,042 INFO L373 chiAutomizerObserver]: Analyzing ICFG fibo_7-1.c [2020-10-19 20:08:12,101 INFO L359 BuchiCegarLoop]: Interprodecural is true [2020-10-19 20:08:12,102 INFO L360 BuchiCegarLoop]: Hoare is false [2020-10-19 20:08:12,102 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2020-10-19 20:08:12,102 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-19 20:08:12,103 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-19 20:08:12,103 INFO L364 BuchiCegarLoop]: Difference is false [2020-10-19 20:08:12,103 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-19 20:08:12,104 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2020-10-19 20:08:12,128 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 19 states. [2020-10-19 20:08:12,171 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-10-19 20:08:12,171 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 20:08:12,172 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 20:08:12,184 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2020-10-19 20:08:12,184 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-10-19 20:08:12,184 INFO L427 BuchiCegarLoop]: ======== Iteration 1============ [2020-10-19 20:08:12,185 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 19 states. [2020-10-19 20:08:12,197 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-10-19 20:08:12,197 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 20:08:12,198 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 20:08:12,198 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2020-10-19 20:08:12,198 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-10-19 20:08:12,209 INFO L794 eck$LassoCheckResult]: Stem: 13#ULTIMATE.startENTRYtrue #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(11);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 11#L-1true havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 7; 8#L27true call main_#t~ret9 := fibo(main_~x~0);< 16#fiboENTRYtrue [2020-10-19 20:08:12,210 INFO L796 eck$LassoCheckResult]: Loop: 16#fiboENTRYtrue ~n := #in~n; 14#L8true assume !(~n < 1); 18#L10true assume !(1 == ~n); 7#L13true call #t~ret7 := fibo(~n - 1);< 16#fiboENTRYtrue [2020-10-19 20:08:12,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:08:12,215 INFO L82 PathProgramCache]: Analyzing trace with hash 29885, now seen corresponding path program 1 times [2020-10-19 20:08:12,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 20:08:12,224 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595024768] [2020-10-19 20:08:12,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 20:08:12,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 20:08:12,320 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 20:08:12,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 20:08:12,337 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 20:08:12,360 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 20:08:12,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:08:12,362 INFO L82 PathProgramCache]: Analyzing trace with hash 1512524, now seen corresponding path program 1 times [2020-10-19 20:08:12,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 20:08:12,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337124807] [2020-10-19 20:08:12,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 20:08:12,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 20:08:12,369 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 20:08:12,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 20:08:12,373 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 20:08:12,375 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 20:08:12,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:08:12,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1830210312, now seen corresponding path program 1 times [2020-10-19 20:08:12,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 20:08:12,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580770228] [2020-10-19 20:08:12,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 20:08:12,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 20:08:12,399 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 20:08:12,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 20:08:12,416 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 20:08:12,422 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 20:08:12,534 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 20:08:12,535 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 20:08:12,535 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 20:08:12,535 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 20:08:12,536 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-19 20:08:12,536 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:12,536 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 20:08:12,536 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 20:08:12,537 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-1.c_Iteration1_Loop [2020-10-19 20:08:12,537 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 20:08:12,538 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 20:08:12,556 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:08:12,563 INFO 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 20:08:12,567 INFO 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 20:08:12,578 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:08:12,582 INFO 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 20:08:12,665 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 20:08:12,666 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:12,683 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:08:12,684 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 20:08:12,695 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 20:08:12,695 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_~n=0} Honda state: {fibo_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:12,733 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:08:12,733 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 20:08:12,737 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 20:08:12,738 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 20:08:12,781 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:08:12,781 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 20:08:12,785 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 20:08:12,786 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret7=0} Honda state: {fibo_#t~ret7=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:12,809 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:08:12,809 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 20:08:12,813 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 20:08:12,813 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret8=0} Honda state: {fibo_#t~ret8=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:12,847 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:08:12,847 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:12,874 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-19 20:08:12,875 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 20:08:12,902 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-19 20:08:12,904 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 20:08:12,905 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 20:08:12,905 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 20:08:12,905 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 20:08:12,905 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-19 20:08:12,905 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:12,905 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 20:08:12,905 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 20:08:12,906 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-1.c_Iteration1_Loop [2020-10-19 20:08:12,906 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 20:08:12,906 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 20:08:12,910 INFO 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 20:08:12,914 INFO 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 20:08:12,917 INFO 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 20:08:12,921 INFO 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 20:08:12,924 INFO 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 20:08:12,984 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 20:08:12,991 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 20:08:13,010 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-19 20:08:13,014 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:08:13,014 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:08:13,015 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:08:13,015 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:08:13,015 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:08:13,018 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:08:13,019 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:13,025 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 20:08:13,073 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-19 20:08:13,075 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:08:13,075 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:08:13,076 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:08:13,076 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:08:13,076 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:08:13,077 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:08:13,078 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:13,080 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:13,115 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-19 20:08:13,117 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:08:13,117 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:08:13,118 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:08:13,118 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:08:13,118 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:08:13,119 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:08:13,119 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:08:13,122 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:13,150 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 20:08:13,152 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:08:13,152 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:08:13,152 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:08:13,152 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:08:13,153 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:08:13,154 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:08:13,154 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:08:13,156 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 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:13,181 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 20:08:13,183 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:08:13,183 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:08:13,183 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:08:13,184 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:08:13,184 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:08:13,185 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:08:13,186 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:08:13,191 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-19 20:08:13,206 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-19 20:08:13,206 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:13,222 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-19 20:08:13,222 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-19 20:08:13,222 INFO L510 LassoAnalysis]: Proved termination. [2020-10-19 20:08:13,223 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_#in~n) = 1*fibo_#in~n Supporting invariants [] [2020-10-19 20:08:13,260 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-19 20:08:13,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:08:13,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:13,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-19 20:08:13,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:13,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:13,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-19 20:08:13,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:13,371 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 20:08:13,386 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2020-10-19 20:08:13,388 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 19 states. Second operand 4 states. [2020-10-19 20:08:13,567 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 19 states.. Second operand 4 states. Result 49 states and 61 transitions. Complement of second has 12 states. [2020-10-19 20:08:13,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2020-10-19 20:08:13,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-19 20:08:13,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 11 transitions. [2020-10-19 20:08:13,577 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 3 letters. Loop has 4 letters. [2020-10-19 20:08:13,580 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:08:13,581 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 7 letters. Loop has 4 letters. [2020-10-19 20:08:13,581 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:08:13,581 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 3 letters. Loop has 8 letters. [2020-10-19 20:08:13,582 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:08:13,583 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 49 states and 61 transitions. [2020-10-19 20:08:13,601 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-10-19 20:08:13,612 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 49 states to 25 states and 34 transitions. [2020-10-19 20:08:13,614 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 17 [2020-10-19 20:08:13,615 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 18 [2020-10-19 20:08:13,616 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 34 transitions. [2020-10-19 20:08:13,616 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 20:08:13,617 INFO L691 BuchiCegarLoop]: Abstraction has 25 states and 34 transitions. [2020-10-19 20:08:13,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states and 34 transitions. [2020-10-19 20:08:13,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 20. [2020-10-19 20:08:13,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-19 20:08:13,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 26 transitions. [2020-10-19 20:08:13,667 INFO L714 BuchiCegarLoop]: Abstraction has 20 states and 26 transitions. [2020-10-19 20:08:13,667 INFO L594 BuchiCegarLoop]: Abstraction has 20 states and 26 transitions. [2020-10-19 20:08:13,667 INFO L427 BuchiCegarLoop]: ======== Iteration 2============ [2020-10-19 20:08:13,667 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 20 states and 26 transitions. [2020-10-19 20:08:13,670 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-10-19 20:08:13,671 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 20:08:13,671 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 20:08:13,673 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 20:08:13,673 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 20:08:13,674 INFO L794 eck$LassoCheckResult]: Stem: 132#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(11);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 130#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 7; 128#L27 call main_#t~ret9 := fibo(main_~x~0);< 138#fiboENTRY ~n := #in~n; 136#L8 assume !(~n < 1); 137#L10 assume !(1 == ~n); 125#L13 call #t~ret7 := fibo(~n - 1);< 131#fiboENTRY ~n := #in~n; 133#L8 assume ~n < 1;#res := 0; 134#fiboFINAL assume true; 124#fiboEXIT >#35#return; 126#L13-1 [2020-10-19 20:08:13,675 INFO L796 eck$LassoCheckResult]: Loop: 126#L13-1 call #t~ret8 := fibo(~n - 2);< 129#fiboENTRY ~n := #in~n; 143#L8 assume !(~n < 1); 142#L10 assume !(1 == ~n); 127#L13 call #t~ret7 := fibo(~n - 1);< 129#fiboENTRY ~n := #in~n; 143#L8 assume ~n < 1;#res := 0; 140#fiboFINAL assume true; 141#fiboEXIT >#35#return; 126#L13-1 [2020-10-19 20:08:13,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:08:13,675 INFO L82 PathProgramCache]: Analyzing trace with hash 523436175, now seen corresponding path program 1 times [2020-10-19 20:08:13,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 20:08:13,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535238003] [2020-10-19 20:08:13,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 20:08:13,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:13,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-19 20:08:13,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:13,828 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-19 20:08:13,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535238003] [2020-10-19 20:08:13,829 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 20:08:13,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-19 20:08:13,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288439659] [2020-10-19 20:08:13,834 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-19 20:08:13,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:08:13,835 INFO L82 PathProgramCache]: Analyzing trace with hash 1950983701, now seen corresponding path program 1 times [2020-10-19 20:08:13,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 20:08:13,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164230197] [2020-10-19 20:08:13,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 20:08:13,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:13,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-19 20:08:13,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:13,887 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-19 20:08:13,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164230197] [2020-10-19 20:08:13,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 20:08:13,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-19 20:08:13,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595787400] [2020-10-19 20:08:13,890 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-10-19 20:08:13,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 20:08:13,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-19 20:08:13,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-19 20:08:13,896 INFO L87 Difference]: Start difference. First operand 20 states and 26 transitions. cyclomatic complexity: 8 Second operand 6 states. [2020-10-19 20:08:13,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 20:08:13,989 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2020-10-19 20:08:13,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-19 20:08:13,991 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 26 states and 32 transitions. [2020-10-19 20:08:13,993 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-10-19 20:08:13,995 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 26 states to 24 states and 30 transitions. [2020-10-19 20:08:13,995 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 20 [2020-10-19 20:08:13,996 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 20 [2020-10-19 20:08:13,996 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 30 transitions. [2020-10-19 20:08:13,997 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 20:08:13,997 INFO L691 BuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2020-10-19 20:08:13,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states and 30 transitions. [2020-10-19 20:08:14,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-19 20:08:14,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-19 20:08:14,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2020-10-19 20:08:14,003 INFO L714 BuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2020-10-19 20:08:14,003 INFO L594 BuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2020-10-19 20:08:14,003 INFO L427 BuchiCegarLoop]: ======== Iteration 3============ [2020-10-19 20:08:14,003 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 24 states and 30 transitions. [2020-10-19 20:08:14,004 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-10-19 20:08:14,005 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 20:08:14,005 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 20:08:14,006 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 20:08:14,007 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2020-10-19 20:08:14,007 INFO L794 eck$LassoCheckResult]: Stem: 205#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(11);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 200#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 7; 201#L27 call main_#t~ret9 := fibo(main_~x~0);< 208#fiboENTRY ~n := #in~n; 211#L8 assume !(~n < 1); 212#L10 assume !(1 == ~n); 198#L13 call #t~ret7 := fibo(~n - 1);< 204#fiboENTRY ~n := #in~n; 209#L8 assume !(~n < 1); 210#L10 assume 1 == ~n;#res := 1; 213#fiboFINAL assume true; 197#fiboEXIT >#35#return; 199#L13-1 [2020-10-19 20:08:14,007 INFO L796 eck$LassoCheckResult]: Loop: 199#L13-1 call #t~ret8 := fibo(~n - 2);< 203#fiboENTRY ~n := #in~n; 218#L8 assume !(~n < 1); 217#L10 assume !(1 == ~n); 202#L13 call #t~ret7 := fibo(~n - 1);< 203#fiboENTRY ~n := #in~n; 218#L8 assume !(~n < 1); 217#L10 assume !(1 == ~n); 202#L13 call #t~ret7 := fibo(~n - 1);< 203#fiboENTRY ~n := #in~n; 218#L8 assume !(~n < 1); 217#L10 assume 1 == ~n;#res := 1; 206#fiboFINAL assume true; 207#fiboEXIT >#35#return; 199#L13-1 call #t~ret8 := fibo(~n - 2);< 203#fiboENTRY ~n := #in~n; 218#L8 assume ~n < 1;#res := 0; 219#fiboFINAL assume true; 216#fiboEXIT >#37#return; 214#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 215#fiboFINAL assume true; 220#fiboEXIT >#35#return; 199#L13-1 [2020-10-19 20:08:14,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:08:14,008 INFO L82 PathProgramCache]: Analyzing trace with hash -953322862, now seen corresponding path program 1 times [2020-10-19 20:08:14,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 20:08:14,009 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20012218] [2020-10-19 20:08:14,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 20:08:14,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:14,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-19 20:08:14,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:14,076 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 20:08:14,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20012218] [2020-10-19 20:08:14,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544451595] [2020-10-19 20:08:14,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 20:08:14,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:14,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-19 20:08:14,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:14,151 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 20:08:14,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 20:08:14,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-19 20:08:14,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642782532] [2020-10-19 20:08:14,152 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-19 20:08:14,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:08:14,153 INFO L82 PathProgramCache]: Analyzing trace with hash -2000232554, now seen corresponding path program 1 times [2020-10-19 20:08:14,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 20:08:14,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332780691] [2020-10-19 20:08:14,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 20:08:14,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 20:08:14,164 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 20:08:14,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 20:08:14,174 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 20:08:14,177 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 20:08:14,423 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 20:08:14,423 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 20:08:14,423 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 20:08:14,424 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 20:08:14,424 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-19 20:08:14,424 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:14,424 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 20:08:14,424 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 20:08:14,424 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-1.c_Iteration3_Loop [2020-10-19 20:08:14,425 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 20:08:14,425 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 20:08:14,427 INFO 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 20:08:14,431 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 20:08:14,434 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:08:14,437 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:08:14,495 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 20:08:14,495 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 20:08:14,507 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:08:14,507 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:14,511 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 20:08:14,512 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret7=1} Honda state: {fibo_#t~ret7=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 20:08:14,564 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:08:14,564 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:14,568 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 20:08:14,569 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 20:08:14,615 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:08:14,615 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:14,620 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 20:08:14,621 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret8=0} Honda state: {fibo_#t~ret8=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 20:08:14,677 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:08:14,677 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 20:08:14,737 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-19 20:08:14,737 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:15,701 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-19 20:08:15,703 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 20:08:15,703 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 20:08:15,703 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 20:08:15,704 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 20:08:15,704 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-19 20:08:15,704 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:15,704 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 20:08:15,704 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 20:08:15,704 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-1.c_Iteration3_Loop [2020-10-19 20:08:15,704 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 20:08:15,704 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 20:08:15,706 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:08:15,709 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:08:15,711 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:08:15,720 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:08:15,767 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 20:08:15,767 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 20:08:15,779 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-19 20:08:15,781 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:08:15,781 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:08:15,782 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:08:15,782 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:08:15,782 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:08:15,783 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:08:15,783 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:15,785 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:15,835 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-19 20:08:15,837 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:08:15,838 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:08:15,838 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:08:15,838 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:08:15,838 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:08:15,839 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:08:15,839 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:08:15,841 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:15,874 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-19 20:08:15,876 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:08:15,876 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:08:15,876 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:08:15,876 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:08:15,877 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:08:15,879 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:08:15,884 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:08:15,888 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-19 20:08:15,896 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-19 20:08:15,896 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:15,910 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-19 20:08:15,910 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-19 20:08:15,911 INFO L510 LassoAnalysis]: Proved termination. [2020-10-19 20:08:15,911 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2020-10-19 20:08:15,937 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-19 20:08:15,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:08:15,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:15,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-19 20:08:15,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:16,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:16,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-19 20:08:16,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:16,284 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-19 20:08:16,285 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 7 loop predicates [2020-10-19 20:08:16,285 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 24 states and 30 transitions. cyclomatic complexity: 8 Second operand 9 states. [2020-10-19 20:08:16,622 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 24 states and 30 transitions. cyclomatic complexity: 8. Second operand 9 states. Result 159 states and 215 transitions. Complement of second has 48 states. [2020-10-19 20:08:16,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 10 states 2 stem states 7 non-accepting loop states 1 accepting loop states [2020-10-19 20:08:16,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-10-19 20:08:16,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 41 transitions. [2020-10-19 20:08:16,625 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 41 transitions. Stem has 12 letters. Loop has 22 letters. [2020-10-19 20:08:16,626 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:08:16,626 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 41 transitions. Stem has 34 letters. Loop has 22 letters. [2020-10-19 20:08:16,627 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:08:16,627 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 41 transitions. Stem has 12 letters. Loop has 44 letters. [2020-10-19 20:08:16,628 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:08:16,629 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 159 states and 215 transitions. [2020-10-19 20:08:16,638 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 15 [2020-10-19 20:08:16,644 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 159 states to 128 states and 180 transitions. [2020-10-19 20:08:16,645 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 74 [2020-10-19 20:08:16,646 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 79 [2020-10-19 20:08:16,646 INFO L73 IsDeterministic]: Start isDeterministic. Operand 128 states and 180 transitions. [2020-10-19 20:08:16,647 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 20:08:16,647 INFO L691 BuchiCegarLoop]: Abstraction has 128 states and 180 transitions. [2020-10-19 20:08:16,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states and 180 transitions. [2020-10-19 20:08:16,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 106. [2020-10-19 20:08:16,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-19 20:08:16,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 140 transitions. [2020-10-19 20:08:16,666 INFO L714 BuchiCegarLoop]: Abstraction has 106 states and 140 transitions. [2020-10-19 20:08:16,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 20:08:16,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-19 20:08:16,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-19 20:08:16,667 INFO L87 Difference]: Start difference. First operand 106 states and 140 transitions. Second operand 8 states. [2020-10-19 20:08:16,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 20:08:16,785 INFO L93 Difference]: Finished difference Result 125 states and 167 transitions. [2020-10-19 20:08:16,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-19 20:08:16,786 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 125 states and 167 transitions. [2020-10-19 20:08:16,790 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 15 [2020-10-19 20:08:16,795 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 125 states to 122 states and 164 transitions. [2020-10-19 20:08:16,795 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 77 [2020-10-19 20:08:16,796 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 77 [2020-10-19 20:08:16,796 INFO L73 IsDeterministic]: Start isDeterministic. Operand 122 states and 164 transitions. [2020-10-19 20:08:16,797 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 20:08:16,797 INFO L691 BuchiCegarLoop]: Abstraction has 122 states and 164 transitions. [2020-10-19 20:08:16,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states and 164 transitions. [2020-10-19 20:08:16,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 106. [2020-10-19 20:08:16,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-19 20:08:16,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 139 transitions. [2020-10-19 20:08:16,815 INFO L714 BuchiCegarLoop]: Abstraction has 106 states and 139 transitions. [2020-10-19 20:08:16,816 INFO L594 BuchiCegarLoop]: Abstraction has 106 states and 139 transitions. [2020-10-19 20:08:16,816 INFO L427 BuchiCegarLoop]: ======== Iteration 4============ [2020-10-19 20:08:16,816 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 106 states and 139 transitions. [2020-10-19 20:08:16,821 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 15 [2020-10-19 20:08:16,821 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 20:08:16,821 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 20:08:16,822 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [5, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 20:08:16,823 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1] [2020-10-19 20:08:16,825 INFO L794 eck$LassoCheckResult]: Stem: 864#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(11);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 859#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 7; 842#L27 call main_#t~ret9 := fibo(main_~x~0);< 873#fiboENTRY ~n := #in~n; 910#L8 assume !(~n < 1); 882#L10 assume !(1 == ~n); 862#L13 call #t~ret7 := fibo(~n - 1);< 863#fiboENTRY ~n := #in~n; 867#L8 assume !(~n < 1); 869#L10 assume !(1 == ~n); 868#L13 call #t~ret7 := fibo(~n - 1);< 863#fiboENTRY ~n := #in~n; 867#L8 assume !(~n < 1); 869#L10 assume !(1 == ~n); 868#L13 call #t~ret7 := fibo(~n - 1);< 863#fiboENTRY ~n := #in~n; 879#L8 assume !(~n < 1); 909#L10 assume 1 == ~n;#res := 1; 908#fiboFINAL assume true; 907#fiboEXIT >#35#return; 845#L13-1 call #t~ret8 := fibo(~n - 2);< 905#fiboENTRY ~n := #in~n; 912#L8 assume ~n < 1;#res := 0; 945#fiboFINAL assume true; 944#fiboEXIT >#37#return; 941#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 940#fiboFINAL assume true; 938#fiboEXIT >#35#return; 861#L13-1 [2020-10-19 20:08:16,825 INFO L796 eck$LassoCheckResult]: Loop: 861#L13-1 call #t~ret8 := fibo(~n - 2);< 843#fiboENTRY ~n := #in~n; 933#L8 assume !(~n < 1); 880#L10 assume !(1 == ~n); 860#L13 call #t~ret7 := fibo(~n - 1);< 843#fiboENTRY ~n := #in~n; 933#L8 assume !(~n < 1); 880#L10 assume 1 == ~n;#res := 1; 881#fiboFINAL assume true; 935#fiboEXIT >#35#return; 861#L13-1 [2020-10-19 20:08:16,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:08:16,826 INFO L82 PathProgramCache]: Analyzing trace with hash 1335554545, now seen corresponding path program 1 times [2020-10-19 20:08:16,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 20:08:16,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175028171] [2020-10-19 20:08:16,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 20:08:16,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:16,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-19 20:08:16,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:16,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-19 20:08:16,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:16,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-19 20:08:16,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:16,931 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-19 20:08:16,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175028171] [2020-10-19 20:08:16,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391443094] [2020-10-19 20:08:16,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 20:08:16,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:16,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-19 20:08:16,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:17,009 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-19 20:08:17,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 20:08:17,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-19 20:08:17,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443711933] [2020-10-19 20:08:17,011 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-19 20:08:17,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:08:17,011 INFO L82 PathProgramCache]: Analyzing trace with hash 350977484, now seen corresponding path program 1 times [2020-10-19 20:08:17,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 20:08:17,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340667581] [2020-10-19 20:08:17,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 20:08:17,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 20:08:17,017 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 20:08:17,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 20:08:17,020 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 20:08:17,022 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 20:08:17,138 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 20:08:17,138 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 20:08:17,138 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 20:08:17,139 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 20:08:17,139 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-19 20:08:17,139 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:17,139 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 20:08:17,139 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 20:08:17,139 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-1.c_Iteration4_Loop [2020-10-19 20:08:17,139 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 20:08:17,140 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 20:08:17,141 INFO 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 20:08:17,145 INFO 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 20:08:17,152 INFO 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 20:08:17,155 INFO 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 20:08:17,200 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 20:08:17,200 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:17,204 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:08:17,204 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 20:08:17,207 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 20:08:17,207 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:17,231 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:08:17,231 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:17,257 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-19 20:08:17,257 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 20:08:18,420 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-19 20:08:18,422 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 20:08:18,422 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 20:08:18,422 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 20:08:18,422 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 20:08:18,422 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-19 20:08:18,422 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:18,422 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 20:08:18,423 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 20:08:18,423 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-1.c_Iteration4_Loop [2020-10-19 20:08:18,423 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 20:08:18,423 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 20:08:18,424 INFO 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 20:08:18,441 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:08:18,450 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 20:08:18,453 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 20:08:18,499 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 20:08:18,499 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:18,505 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 20:08:18,506 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:08:18,506 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:08:18,507 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:08:18,507 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:08:18,507 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:08:18,508 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:08:18,508 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:08:18,509 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:18,532 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 20:08:18,533 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:08:18,533 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:08:18,534 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:08:18,534 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:08:18,534 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:08:18,535 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:08:18,535 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:08:18,538 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-19 20:08:18,541 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-19 20:08:18,542 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:18,545 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-19 20:08:18,545 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-19 20:08:18,545 INFO L510 LassoAnalysis]: Proved termination. [2020-10-19 20:08:18,545 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2020-10-19 20:08:18,566 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-19 20:08:18,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:08:18,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:18,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-19 20:08:18,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:18,657 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:08:18,663 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:08:18,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:18,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-19 20:08:18,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:18,737 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 20:08:18,738 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 20:08:18,738 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 106 states and 139 transitions. cyclomatic complexity: 38 Second operand 8 states. [2020-10-19 20:08:18,998 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 106 states and 139 transitions. cyclomatic complexity: 38. Second operand 8 states. Result 195 states and 261 transitions. Complement of second has 33 states. [2020-10-19 20:08:18,999 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 20:08:18,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-19 20:08:19,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 37 transitions. [2020-10-19 20:08:19,007 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 37 transitions. Stem has 28 letters. Loop has 10 letters. [2020-10-19 20:08:19,007 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:08:19,007 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-19 20:08:19,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:08:19,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:19,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-19 20:08:19,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:19,082 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:08:19,087 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:08:19,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:19,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-19 20:08:19,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:19,186 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 20:08:19,186 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 20:08:19,186 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 106 states and 139 transitions. cyclomatic complexity: 38 Second operand 8 states. [2020-10-19 20:08:19,376 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 106 states and 139 transitions. cyclomatic complexity: 38. Second operand 8 states. Result 292 states and 393 transitions. Complement of second has 25 states. [2020-10-19 20:08:19,378 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 20:08:19,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-19 20:08:19,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 24 transitions. [2020-10-19 20:08:19,379 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 24 transitions. Stem has 28 letters. Loop has 10 letters. [2020-10-19 20:08:19,379 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:08:19,380 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-19 20:08:19,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:08:19,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:19,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-19 20:08:19,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:19,459 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:08:19,464 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:08:19,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:19,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-19 20:08:19,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:19,572 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 20:08:19,573 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 20:08:19,573 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 106 states and 139 transitions. cyclomatic complexity: 38 Second operand 8 states. [2020-10-19 20:08:19,904 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 106 states and 139 transitions. cyclomatic complexity: 38. Second operand 8 states. Result 810 states and 1071 transitions. Complement of second has 130 states. [2020-10-19 20:08:19,905 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 20:08:19,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-19 20:08:19,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 42 transitions. [2020-10-19 20:08:19,908 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 42 transitions. Stem has 28 letters. Loop has 10 letters. [2020-10-19 20:08:19,912 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:08:19,913 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 42 transitions. Stem has 38 letters. Loop has 10 letters. [2020-10-19 20:08:19,914 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:08:19,914 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 42 transitions. Stem has 28 letters. Loop has 20 letters. [2020-10-19 20:08:19,918 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:08:19,919 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 810 states and 1071 transitions. [2020-10-19 20:08:19,943 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 44 [2020-10-19 20:08:19,970 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 810 states to 419 states and 599 transitions. [2020-10-19 20:08:19,971 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 159 [2020-10-19 20:08:19,975 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 183 [2020-10-19 20:08:19,975 INFO L73 IsDeterministic]: Start isDeterministic. Operand 419 states and 599 transitions. [2020-10-19 20:08:19,976 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 20:08:19,976 INFO L691 BuchiCegarLoop]: Abstraction has 419 states and 599 transitions. [2020-10-19 20:08:19,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states and 599 transitions. [2020-10-19 20:08:20,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 332. [2020-10-19 20:08:20,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 332 states. [2020-10-19 20:08:20,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 449 transitions. [2020-10-19 20:08:20,044 INFO L714 BuchiCegarLoop]: Abstraction has 332 states and 449 transitions. [2020-10-19 20:08:20,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 20:08:20,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-19 20:08:20,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-19 20:08:20,046 INFO L87 Difference]: Start difference. First operand 332 states and 449 transitions. Second operand 11 states. [2020-10-19 20:08:20,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 20:08:20,280 INFO L93 Difference]: Finished difference Result 504 states and 744 transitions. [2020-10-19 20:08:20,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-19 20:08:20,281 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 504 states and 744 transitions. [2020-10-19 20:08:20,290 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-10-19 20:08:20,300 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 504 states to 502 states and 741 transitions. [2020-10-19 20:08:20,300 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 226 [2020-10-19 20:08:20,301 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 226 [2020-10-19 20:08:20,301 INFO L73 IsDeterministic]: Start isDeterministic. Operand 502 states and 741 transitions. [2020-10-19 20:08:20,301 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 20:08:20,302 INFO L691 BuchiCegarLoop]: Abstraction has 502 states and 741 transitions. [2020-10-19 20:08:20,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states and 741 transitions. [2020-10-19 20:08:20,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 456. [2020-10-19 20:08:20,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 456 states. [2020-10-19 20:08:20,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 677 transitions. [2020-10-19 20:08:20,330 INFO L714 BuchiCegarLoop]: Abstraction has 456 states and 677 transitions. [2020-10-19 20:08:20,330 INFO L594 BuchiCegarLoop]: Abstraction has 456 states and 677 transitions. [2020-10-19 20:08:20,330 INFO L427 BuchiCegarLoop]: ======== Iteration 5============ [2020-10-19 20:08:20,330 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 456 states and 677 transitions. [2020-10-19 20:08:20,334 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-10-19 20:08:20,335 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 20:08:20,335 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 20:08:20,336 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 20:08:20,336 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-10-19 20:08:20,336 INFO L794 eck$LassoCheckResult]: Stem: 3811#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(11);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 3797#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 7; 3798#L27 call main_#t~ret9 := fibo(main_~x~0);< 3819#fiboENTRY ~n := #in~n; 3864#L8 assume !(~n < 1); 3863#L10 assume !(1 == ~n); 3859#L13 call #t~ret7 := fibo(~n - 1);< 3861#fiboENTRY ~n := #in~n; 3862#L8 assume !(~n < 1); 3858#L10 assume !(1 == ~n); 3842#L13 call #t~ret7 := fibo(~n - 1);< 3855#fiboENTRY ~n := #in~n; 3856#L8 assume !(~n < 1); 3860#L10 assume !(1 == ~n); 3841#L13 call #t~ret7 := fibo(~n - 1);< 3855#fiboENTRY ~n := #in~n; 3857#L8 assume !(~n < 1); 3840#L10 assume 1 == ~n;#res := 1; 3843#fiboFINAL assume true; 3915#fiboEXIT >#35#return; 3909#L13-1 call #t~ret8 := fibo(~n - 2);< 3911#fiboENTRY ~n := #in~n; 4104#L8 assume !(~n < 1); 4031#L10 assume !(1 == ~n); 4032#L13 call #t~ret7 := fibo(~n - 1);< 4042#fiboENTRY ~n := #in~n; 4068#L8 assume !(~n < 1); 4049#L10 assume !(1 == ~n); 4050#L13 call #t~ret7 := fibo(~n - 1);< 4060#fiboENTRY [2020-10-19 20:08:20,336 INFO L796 eck$LassoCheckResult]: Loop: 4060#fiboENTRY ~n := #in~n; 4067#L8 assume !(~n < 1); 4066#L10 assume !(1 == ~n); 4059#L13 call #t~ret7 := fibo(~n - 1);< 4060#fiboENTRY [2020-10-19 20:08:20,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:08:20,337 INFO L82 PathProgramCache]: Analyzing trace with hash -777601154, now seen corresponding path program 1 times [2020-10-19 20:08:20,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 20:08:20,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266435855] [2020-10-19 20:08:20,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 20:08:20,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:20,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-19 20:08:20,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:20,485 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 30 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-19 20:08:20,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266435855] [2020-10-19 20:08:20,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144657399] [2020-10-19 20:08:20,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 20:08:20,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:20,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-19 20:08:20,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:20,668 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 30 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-19 20:08:20,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 20:08:20,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-19 20:08:20,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22799193] [2020-10-19 20:08:20,670 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-19 20:08:20,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:08:20,670 INFO L82 PathProgramCache]: Analyzing trace with hash 1512524, now seen corresponding path program 2 times [2020-10-19 20:08:20,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 20:08:20,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125818551] [2020-10-19 20:08:20,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 20:08:20,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 20:08:20,673 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 20:08:20,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 20:08:20,675 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 20:08:20,676 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 20:08:20,706 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 20:08:20,706 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 20:08:20,706 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 20:08:20,706 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 20:08:20,706 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-19 20:08:20,706 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:20,706 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 20:08:20,706 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 20:08:20,707 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-1.c_Iteration5_Loop [2020-10-19 20:08:20,707 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 20:08:20,707 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 20:08:20,708 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:08:20,710 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:08:20,712 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:08:20,715 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:08:20,722 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:08:20,755 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 20:08:20,755 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 20:08:20,764 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:08:20,764 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:20,768 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 20:08:20,768 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:20,805 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:08:20,805 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 20:08:20,808 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 20:08:20,808 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret7=0} Honda state: {fibo_#t~ret7=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:20,832 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:08:20,832 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 20:08:20,835 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 20:08:20,835 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_~n=0} Honda state: {fibo_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:20,864 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:08:20,864 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:20,890 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-19 20:08:20,890 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 20:08:20,955 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-19 20:08:20,957 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 20:08:20,957 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 20:08:20,957 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 20:08:20,957 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 20:08:20,957 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-19 20:08:20,958 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:20,958 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 20:08:20,958 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 20:08:20,958 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-1.c_Iteration5_Loop [2020-10-19 20:08:20,958 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 20:08:20,958 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 20:08:20,959 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 20:08:20,964 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 20:08:20,965 INFO 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 20:08:20,968 INFO 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 20:08:20,970 INFO 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 20:08:21,012 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 20:08:21,012 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:21,020 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 20:08:21,021 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:08:21,021 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:08:21,021 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:08:21,021 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:08:21,022 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:08:21,022 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:08:21,022 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:08:21,023 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 20:08:21,047 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false Waiting until toolchain timeout for monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:21,048 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:08:21,048 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:08:21,048 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:08:21,048 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:08:21,048 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:08:21,049 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:08:21,049 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:08:21,055 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:21,090 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 20:08:21,091 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:08:21,091 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:08:21,091 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:08:21,091 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:08:21,091 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:08:21,093 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:08:21,094 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:08:21,095 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:21,117 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 20:08:21,119 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:08:21,119 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:08:21,119 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:08:21,119 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:08:21,119 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:08:21,120 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:08:21,120 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:08:21,121 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:21,153 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 20:08:21,154 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:08:21,154 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:08:21,155 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:08:21,155 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:08:21,155 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:08:21,156 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:08:21,156 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:08:21,160 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-19 20:08:21,171 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-19 20:08:21,171 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 20:08:21,175 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-19 20:08:21,175 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-19 20:08:21,175 INFO L510 LassoAnalysis]: Proved termination. [2020-10-19 20:08:21,175 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_#in~n) = 1*fibo_#in~n Supporting invariants [] Waiting until toolchain timeout for monitored process 42 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:21,210 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-19 20:08:21,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:08:21,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:21,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-19 20:08:21,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:21,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:21,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-19 20:08:21,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:21,325 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 20:08:21,325 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2020-10-19 20:08:21,325 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 456 states and 677 transitions. cyclomatic complexity: 231 Second operand 5 states. [2020-10-19 20:08:21,400 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 456 states and 677 transitions. cyclomatic complexity: 231. Second operand 5 states. Result 466 states and 687 transitions. Complement of second has 13 states. [2020-10-19 20:08:21,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2020-10-19 20:08:21,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-10-19 20:08:21,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 13 transitions. [2020-10-19 20:08:21,401 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 13 transitions. Stem has 29 letters. Loop has 4 letters. [2020-10-19 20:08:21,402 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:08:21,402 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-19 20:08:21,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:08:21,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:21,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-19 20:08:21,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:21,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:21,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-19 20:08:21,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:21,498 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 20:08:21,498 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 3 loop predicates [2020-10-19 20:08:21,498 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 456 states and 677 transitions. cyclomatic complexity: 231 Second operand 5 states. [2020-10-19 20:08:21,574 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 456 states and 677 transitions. cyclomatic complexity: 231. Second operand 5 states. Result 466 states and 687 transitions. Complement of second has 13 states. [2020-10-19 20:08:21,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2020-10-19 20:08:21,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-10-19 20:08:21,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 13 transitions. [2020-10-19 20:08:21,577 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 13 transitions. Stem has 29 letters. Loop has 4 letters. [2020-10-19 20:08:21,577 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:08:21,577 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-19 20:08:21,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:08:21,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:21,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-19 20:08:21,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:21,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:21,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-19 20:08:21,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:21,708 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 20:08:21,709 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2020-10-19 20:08:21,709 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 456 states and 677 transitions. cyclomatic complexity: 231 Second operand 5 states. [2020-10-19 20:08:21,815 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 456 states and 677 transitions. cyclomatic complexity: 231. Second operand 5 states. Result 617 states and 861 transitions. Complement of second has 14 states. [2020-10-19 20:08:21,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2020-10-19 20:08:21,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-10-19 20:08:21,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 21 transitions. [2020-10-19 20:08:21,816 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 29 letters. Loop has 4 letters. [2020-10-19 20:08:21,817 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:08:21,817 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 33 letters. Loop has 4 letters. [2020-10-19 20:08:21,817 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:08:21,817 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 29 letters. Loop has 8 letters. [2020-10-19 20:08:21,818 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:08:21,818 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 617 states and 861 transitions. [2020-10-19 20:08:21,826 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-10-19 20:08:21,834 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 617 states to 520 states and 752 transitions. [2020-10-19 20:08:21,834 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 189 [2020-10-19 20:08:21,835 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 198 [2020-10-19 20:08:21,835 INFO L73 IsDeterministic]: Start isDeterministic. Operand 520 states and 752 transitions. [2020-10-19 20:08:21,835 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 20:08:21,835 INFO L691 BuchiCegarLoop]: Abstraction has 520 states and 752 transitions. [2020-10-19 20:08:21,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states and 752 transitions. [2020-10-19 20:08:21,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 490. [2020-10-19 20:08:21,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 490 states. [2020-10-19 20:08:21,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 716 transitions. [2020-10-19 20:08:21,856 INFO L714 BuchiCegarLoop]: Abstraction has 490 states and 716 transitions. [2020-10-19 20:08:21,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 20:08:21,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-19 20:08:21,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-10-19 20:08:21,857 INFO L87 Difference]: Start difference. First operand 490 states and 716 transitions. Second operand 12 states. [2020-10-19 20:08:22,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 20:08:22,047 INFO L93 Difference]: Finished difference Result 545 states and 810 transitions. [2020-10-19 20:08:22,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-19 20:08:22,047 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 545 states and 810 transitions. [2020-10-19 20:08:22,055 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-10-19 20:08:22,063 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 545 states to 542 states and 802 transitions. [2020-10-19 20:08:22,063 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 213 [2020-10-19 20:08:22,064 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 213 [2020-10-19 20:08:22,064 INFO L73 IsDeterministic]: Start isDeterministic. Operand 542 states and 802 transitions. [2020-10-19 20:08:22,064 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 20:08:22,064 INFO L691 BuchiCegarLoop]: Abstraction has 542 states and 802 transitions. [2020-10-19 20:08:22,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states and 802 transitions. [2020-10-19 20:08:22,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 511. [2020-10-19 20:08:22,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 511 states. [2020-10-19 20:08:22,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 756 transitions. [2020-10-19 20:08:22,084 INFO L714 BuchiCegarLoop]: Abstraction has 511 states and 756 transitions. [2020-10-19 20:08:22,084 INFO L594 BuchiCegarLoop]: Abstraction has 511 states and 756 transitions. [2020-10-19 20:08:22,084 INFO L427 BuchiCegarLoop]: ======== Iteration 6============ [2020-10-19 20:08:22,085 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 511 states and 756 transitions. [2020-10-19 20:08:22,088 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-10-19 20:08:22,088 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 20:08:22,089 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 20:08:22,090 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [8, 8, 7, 6, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 20:08:22,090 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-10-19 20:08:22,090 INFO L794 eck$LassoCheckResult]: Stem: 7334#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(11);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 7329#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 7; 7325#L27 call main_#t~ret9 := fibo(main_~x~0);< 7347#fiboENTRY ~n := #in~n; 7348#L8 assume !(~n < 1); 7391#L10 assume !(1 == ~n); 7383#L13 call #t~ret7 := fibo(~n - 1);< 7384#fiboENTRY ~n := #in~n; 7393#L8 assume !(~n < 1); 7392#L10 assume !(1 == ~n); 7376#L13 call #t~ret7 := fibo(~n - 1);< 7388#fiboENTRY ~n := #in~n; 7387#L8 assume !(~n < 1); 7386#L10 assume !(1 == ~n); 7380#L13 call #t~ret7 := fibo(~n - 1);< 7385#fiboENTRY ~n := #in~n; 7515#L8 assume !(~n < 1); 7426#L10 assume !(1 == ~n); 7379#L13 call #t~ret7 := fibo(~n - 1);< 7385#fiboENTRY ~n := #in~n; 7493#L8 assume !(~n < 1); 7491#L10 assume 1 == ~n;#res := 1; 7487#fiboFINAL assume true; 7463#fiboEXIT >#35#return; 7448#L13-1 call #t~ret8 := fibo(~n - 2);< 7451#fiboENTRY ~n := #in~n; 7744#L8 assume !(~n < 1); 7741#L10 assume !(1 == ~n); 7351#L13 call #t~ret7 := fibo(~n - 1);< 7358#fiboENTRY ~n := #in~n; 7359#L8 assume !(~n < 1); 7794#L10 assume !(1 == ~n); 7363#L13 call #t~ret7 := fibo(~n - 1);< 7360#fiboENTRY ~n := #in~n; 7365#L8 assume !(~n < 1); 7374#L10 assume !(1 == ~n); 7362#L13 [2020-10-19 20:08:22,090 INFO L796 eck$LassoCheckResult]: Loop: 7362#L13 call #t~ret7 := fibo(~n - 1);< 7360#fiboENTRY ~n := #in~n; 7365#L8 assume !(~n < 1); 7374#L10 assume !(1 == ~n); 7362#L13 [2020-10-19 20:08:22,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:08:22,090 INFO L82 PathProgramCache]: Analyzing trace with hash 42869646, now seen corresponding path program 2 times [2020-10-19 20:08:22,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 20:08:22,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023342434] [2020-10-19 20:08:22,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 20:08:22,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:22,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-19 20:08:22,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:22,206 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 53 proven. 36 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-19 20:08:22,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023342434] [2020-10-19 20:08:22,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707794602] [2020-10-19 20:08:22,207 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 20:08:22,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-19 20:08:22,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 20:08:22,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-19 20:08:22,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:22,273 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 53 proven. 36 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-19 20:08:22,273 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 20:08:22,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-19 20:08:22,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259839357] [2020-10-19 20:08:22,274 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-19 20:08:22,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:08:22,274 INFO L82 PathProgramCache]: Analyzing trace with hash 1955414, now seen corresponding path program 3 times [2020-10-19 20:08:22,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 20:08:22,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012923433] [2020-10-19 20:08:22,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 20:08:22,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 20:08:22,277 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 20:08:22,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 20:08:22,278 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 20:08:22,279 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 20:08:22,315 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 20:08:22,316 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 20:08:22,316 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 20:08:22,316 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 20:08:22,316 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-19 20:08:22,316 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:22,316 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 20:08:22,317 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 20:08:22,317 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-1.c_Iteration6_Loop [2020-10-19 20:08:22,317 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 20:08:22,317 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 20:08:22,318 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:08:22,320 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:08:22,321 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:08:22,330 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:08:22,382 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 20:08:22,383 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:22,389 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:08:22,389 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 20:08:22,392 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 20:08:22,392 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret8=0} Honda state: {fibo_#t~ret8=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:22,414 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:08:22,414 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 20:08:22,416 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 20:08:22,417 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:22,438 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:08:22,438 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:22,476 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-19 20:08:22,476 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 20:08:29,365 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-19 20:08:29,368 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 20:08:29,368 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 20:08:29,368 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 20:08:29,368 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 20:08:29,368 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-19 20:08:29,368 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:29,368 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 20:08:29,368 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 20:08:29,368 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-1.c_Iteration6_Loop [2020-10-19 20:08:29,369 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 20:08:29,369 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 20:08:29,369 INFO 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 20:08:29,371 INFO 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 20:08:29,373 INFO 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 20:08:29,382 INFO 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 20:08:29,431 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 20:08:29,432 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 20:08:29,435 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 48 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:29,436 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:08:29,436 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:08:29,436 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:08:29,436 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:08:29,437 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:08:29,437 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:08:29,437 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:08:29,438 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 20:08:29,460 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 20:08:29,461 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:08:29,461 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:08:29,461 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:08:29,461 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:08:29,461 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:08:29,462 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:08:29,462 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:08:29,463 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 20:08:29,486 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 20:08:29,487 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:08:29,487 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:08:29,487 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:08:29,487 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:08:29,487 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:08:29,488 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:08:29,488 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:08:29,492 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-19 20:08:29,500 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2020-10-19 20:08:29,500 INFO L444 ModelExtractionUtils]: 2 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:29,503 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-19 20:08:29,503 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-19 20:08:29,503 INFO L510 LassoAnalysis]: Proved termination. [2020-10-19 20:08:29,503 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2020-10-19 20:08:29,524 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-19 20:08:29,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:08:29,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:29,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-19 20:08:29,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:29,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:29,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-19 20:08:29,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:29,647 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 20:08:29,648 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 4 loop predicates [2020-10-19 20:08:29,648 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 511 states and 756 transitions. cyclomatic complexity: 255 Second operand 6 states. [2020-10-19 20:08:29,716 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 511 states and 756 transitions. cyclomatic complexity: 255. Second operand 6 states. Result 523 states and 769 transitions. Complement of second has 18 states. [2020-10-19 20:08:29,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2020-10-19 20:08:29,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-19 20:08:29,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 13 transitions. [2020-10-19 20:08:29,718 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 13 transitions. Stem has 36 letters. Loop has 4 letters. [2020-10-19 20:08:29,718 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:08:29,718 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-19 20:08:29,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:08:29,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:29,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-19 20:08:29,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:29,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:29,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-19 20:08:29,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:29,841 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 20:08:29,842 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 4 loop predicates [2020-10-19 20:08:29,842 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 511 states and 756 transitions. cyclomatic complexity: 255 Second operand 6 states. [2020-10-19 20:08:29,936 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 511 states and 756 transitions. cyclomatic complexity: 255. Second operand 6 states. Result 753 states and 1085 transitions. Complement of second has 22 states. [2020-10-19 20:08:29,937 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 20:08:29,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-19 20:08:29,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 16 transitions. [2020-10-19 20:08:29,938 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 36 letters. Loop has 4 letters. [2020-10-19 20:08:29,938 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:08:29,938 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 40 letters. Loop has 4 letters. [2020-10-19 20:08:29,941 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:08:29,941 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 36 letters. Loop has 8 letters. [2020-10-19 20:08:29,941 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:08:29,941 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 753 states and 1085 transitions. [2020-10-19 20:08:29,954 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-10-19 20:08:29,969 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 753 states to 689 states and 1016 transitions. [2020-10-19 20:08:29,970 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 233 [2020-10-19 20:08:29,971 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 261 [2020-10-19 20:08:29,971 INFO L73 IsDeterministic]: Start isDeterministic. Operand 689 states and 1016 transitions. [2020-10-19 20:08:29,973 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 20:08:29,973 INFO L691 BuchiCegarLoop]: Abstraction has 689 states and 1016 transitions. [2020-10-19 20:08:29,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 689 states and 1016 transitions. [2020-10-19 20:08:29,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 689 to 672. [2020-10-19 20:08:29,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 672 states. [2020-10-19 20:08:30,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 672 states to 672 states and 991 transitions. [2020-10-19 20:08:30,005 INFO L714 BuchiCegarLoop]: Abstraction has 672 states and 991 transitions. [2020-10-19 20:08:30,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 20:08:30,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-19 20:08:30,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-10-19 20:08:30,007 INFO L87 Difference]: Start difference. First operand 672 states and 991 transitions. Second operand 14 states. [2020-10-19 20:08:30,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 20:08:30,251 INFO L93 Difference]: Finished difference Result 735 states and 1085 transitions. [2020-10-19 20:08:30,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-19 20:08:30,252 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 735 states and 1085 transitions. [2020-10-19 20:08:30,265 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-10-19 20:08:30,278 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 735 states to 725 states and 1070 transitions. [2020-10-19 20:08:30,278 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 268 [2020-10-19 20:08:30,279 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 268 [2020-10-19 20:08:30,279 INFO L73 IsDeterministic]: Start isDeterministic. Operand 725 states and 1070 transitions. [2020-10-19 20:08:30,279 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 20:08:30,280 INFO L691 BuchiCegarLoop]: Abstraction has 725 states and 1070 transitions. [2020-10-19 20:08:30,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 725 states and 1070 transitions. [2020-10-19 20:08:30,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 725 to 712. [2020-10-19 20:08:30,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 712 states. [2020-10-19 20:08:30,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 1045 transitions. [2020-10-19 20:08:30,311 INFO L714 BuchiCegarLoop]: Abstraction has 712 states and 1045 transitions. [2020-10-19 20:08:30,311 INFO L594 BuchiCegarLoop]: Abstraction has 712 states and 1045 transitions. [2020-10-19 20:08:30,312 INFO L427 BuchiCegarLoop]: ======== Iteration 7============ [2020-10-19 20:08:30,312 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 712 states and 1045 transitions. [2020-10-19 20:08:30,317 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-10-19 20:08:30,318 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 20:08:30,318 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 20:08:30,321 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [10, 9, 8, 7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 20:08:30,322 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-10-19 20:08:30,322 INFO L794 eck$LassoCheckResult]: Stem: 10978#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(11);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 10969#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 7; 10970#L27 call main_#t~ret9 := fibo(main_~x~0);< 10986#fiboENTRY ~n := #in~n; 11071#L8 assume !(~n < 1); 11069#L10 assume !(1 == ~n); 11066#L13 call #t~ret7 := fibo(~n - 1);< 11067#fiboENTRY ~n := #in~n; 11101#L8 assume !(~n < 1); 11100#L10 assume !(1 == ~n); 11078#L13 call #t~ret7 := fibo(~n - 1);< 11081#fiboENTRY ~n := #in~n; 11099#L8 assume !(~n < 1); 11083#L10 assume !(1 == ~n); 11073#L13 call #t~ret7 := fibo(~n - 1);< 11079#fiboENTRY ~n := #in~n; 11110#L8 assume !(~n < 1); 11109#L10 assume !(1 == ~n); 11095#L13 call #t~ret7 := fibo(~n - 1);< 11108#fiboENTRY ~n := #in~n; 11141#L8 assume !(~n < 1); 11130#L10 assume !(1 == ~n); 11096#L13 call #t~ret7 := fibo(~n - 1);< 11129#fiboENTRY ~n := #in~n; 11174#L8 assume !(~n < 1); 11161#L10 assume 1 == ~n;#res := 1; 11158#fiboFINAL assume true; 11156#fiboEXIT >#35#return; 11136#L13-1 call #t~ret8 := fibo(~n - 2);< 11138#fiboENTRY ~n := #in~n; 11152#L8 assume ~n < 1;#res := 0; 11149#fiboFINAL assume true; 11135#fiboEXIT >#37#return; 11134#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 11128#fiboFINAL assume true; 11107#fiboEXIT >#35#return; 11091#L13-1 call #t~ret8 := fibo(~n - 2);< 11098#fiboENTRY ~n := #in~n; 11159#L8 assume !(~n < 1); 11120#L10 assume !(1 == ~n); 11122#L13 call #t~ret7 := fibo(~n - 1);< 11148#fiboENTRY ~n := #in~n; 11320#L8 assume !(~n < 1); 11318#L10 assume !(1 == ~n); 11304#L13 call #t~ret7 := fibo(~n - 1);< 11314#fiboENTRY ~n := #in~n; 11397#L8 assume !(~n < 1); 11396#L10 assume !(1 == ~n); 11305#L13 [2020-10-19 20:08:30,322 INFO L796 eck$LassoCheckResult]: Loop: 11305#L13 call #t~ret7 := fibo(~n - 1);< 11314#fiboENTRY ~n := #in~n; 11397#L8 assume !(~n < 1); 11396#L10 assume !(1 == ~n); 11305#L13 [2020-10-19 20:08:30,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:08:30,323 INFO L82 PathProgramCache]: Analyzing trace with hash -1891219752, now seen corresponding path program 2 times [2020-10-19 20:08:30,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 20:08:30,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577661447] [2020-10-19 20:08:30,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 20:08:30,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:30,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-19 20:08:30,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:30,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-19 20:08:30,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:30,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-19 20:08:30,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:30,529 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 73 proven. 66 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-19 20:08:30,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577661447] [2020-10-19 20:08:30,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75814804] [2020-10-19 20:08:30,530 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 20:08:30,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-19 20:08:30,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 20:08:30,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-19 20:08:30,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:30,659 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 73 proven. 66 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-19 20:08:30,659 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 20:08:30,659 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-19 20:08:30,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080909665] [2020-10-19 20:08:30,660 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-19 20:08:30,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:08:30,660 INFO L82 PathProgramCache]: Analyzing trace with hash 1955414, now seen corresponding path program 4 times [2020-10-19 20:08:30,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 20:08:30,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131617979] [2020-10-19 20:08:30,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 20:08:30,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 20:08:30,665 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 20:08:30,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 20:08:30,666 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 20:08:30,667 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 20:08:30,702 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 20:08:30,702 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 20:08:30,702 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 20:08:30,702 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 20:08:30,702 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-19 20:08:30,702 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:30,702 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 20:08:30,703 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 20:08:30,703 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-1.c_Iteration7_Loop [2020-10-19 20:08:30,703 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 20:08:30,703 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 20:08:30,703 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:08:30,713 INFO 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 20:08:30,715 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:08:30,717 INFO 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 20:08:30,755 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 20:08:30,755 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:30,757 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:08:30,758 INFO L160 nArgumentSynthesizer]: Using integer mode. 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 20:08:30,784 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-19 20:08:30,785 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 20:08:32,082 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-19 20:08:32,084 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 20:08:32,084 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 20:08:32,084 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 20:08:32,085 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 20:08:32,085 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-19 20:08:32,085 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:32,085 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 20:08:32,085 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 20:08:32,085 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-1.c_Iteration7_Loop [2020-10-19 20:08:32,085 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 20:08:32,085 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 20:08:32,086 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:08:32,087 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:08:32,089 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:08:32,090 INFO 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 20:08:32,146 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 20:08:32,146 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 20:08:32,149 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 20:08:32,151 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:08:32,151 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:08:32,152 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:08:32,152 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:08:32,152 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:08:32,152 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:08:32,152 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 55 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:32,154 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:08:32,182 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 20:08:32,184 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:08:32,184 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:08:32,184 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:08:32,184 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:08:32,184 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:08:32,185 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:08:32,185 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:08:32,186 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:32,210 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 20:08:32,212 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:08:32,212 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:08:32,212 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:08:32,212 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:08:32,213 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:08:32,213 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:08:32,213 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:08:32,214 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:32,238 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 20:08:32,240 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:08:32,240 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:08:32,240 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:08:32,240 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:08:32,241 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:08:32,242 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:08:32,242 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:08:32,244 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-19 20:08:32,246 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2020-10-19 20:08:32,247 INFO L444 ModelExtractionUtils]: 2 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:32,252 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-19 20:08:32,252 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-19 20:08:32,252 INFO L510 LassoAnalysis]: Proved termination. [2020-10-19 20:08:32,252 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2020-10-19 20:08:32,273 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-19 20:08:32,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:08:32,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:32,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-19 20:08:32,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:32,370 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:08:32,377 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:08:32,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:32,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-19 20:08:32,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:32,424 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 20:08:32,424 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 4 loop predicates [2020-10-19 20:08:32,425 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 712 states and 1045 transitions. cyclomatic complexity: 346 Second operand 6 states. [2020-10-19 20:08:32,495 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 712 states and 1045 transitions. cyclomatic complexity: 346. Second operand 6 states. Result 731 states and 1065 transitions. Complement of second has 18 states. [2020-10-19 20:08:32,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2020-10-19 20:08:32,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-19 20:08:32,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 13 transitions. [2020-10-19 20:08:32,497 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 13 transitions. Stem has 48 letters. Loop has 4 letters. [2020-10-19 20:08:32,497 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:08:32,497 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-19 20:08:32,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:08:32,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:32,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-19 20:08:32,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:32,589 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:08:32,591 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:08:32,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:32,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-19 20:08:32,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:32,645 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 20:08:32,645 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 4 loop predicates [2020-10-19 20:08:32,645 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 712 states and 1045 transitions. cyclomatic complexity: 346 Second operand 6 states. [2020-10-19 20:08:32,758 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 712 states and 1045 transitions. cyclomatic complexity: 346. Second operand 6 states. Result 916 states and 1284 transitions. Complement of second has 22 states. [2020-10-19 20:08:32,763 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 20:08:32,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-19 20:08:32,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 16 transitions. [2020-10-19 20:08:32,765 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 48 letters. Loop has 4 letters. [2020-10-19 20:08:32,765 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:08:32,765 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-19 20:08:32,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:08:32,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:32,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-19 20:08:32,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:32,857 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:08:32,861 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:08:32,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:32,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-19 20:08:32,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:32,915 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 20:08:32,915 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 4 loop predicates [2020-10-19 20:08:32,916 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 712 states and 1045 transitions. cyclomatic complexity: 346 Second operand 6 states. [2020-10-19 20:08:33,009 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 712 states and 1045 transitions. cyclomatic complexity: 346. Second operand 6 states. Result 959 states and 1365 transitions. Complement of second has 27 states. [2020-10-19 20:08:33,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2020-10-19 20:08:33,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-19 20:08:33,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 22 transitions. [2020-10-19 20:08:33,011 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 48 letters. Loop has 4 letters. [2020-10-19 20:08:33,011 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:08:33,012 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 52 letters. Loop has 4 letters. [2020-10-19 20:08:33,012 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:08:33,012 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 48 letters. Loop has 8 letters. [2020-10-19 20:08:33,013 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:08:33,013 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 959 states and 1365 transitions. [2020-10-19 20:08:33,027 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-10-19 20:08:33,040 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 959 states to 712 states and 1045 transitions. [2020-10-19 20:08:33,040 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 216 [2020-10-19 20:08:33,042 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 252 [2020-10-19 20:08:33,042 INFO L73 IsDeterministic]: Start isDeterministic. Operand 712 states and 1045 transitions. [2020-10-19 20:08:33,042 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 20:08:33,042 INFO L691 BuchiCegarLoop]: Abstraction has 712 states and 1045 transitions. [2020-10-19 20:08:33,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 712 states and 1045 transitions. [2020-10-19 20:08:33,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 712 to 712. [2020-10-19 20:08:33,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 712 states. [2020-10-19 20:08:33,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 1045 transitions. [2020-10-19 20:08:33,075 INFO L714 BuchiCegarLoop]: Abstraction has 712 states and 1045 transitions. [2020-10-19 20:08:33,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 20:08:33,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-19 20:08:33,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-10-19 20:08:33,076 INFO L87 Difference]: Start difference. First operand 712 states and 1045 transitions. Second operand 15 states. [2020-10-19 20:08:33,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 20:08:33,389 INFO L93 Difference]: Finished difference Result 777 states and 1133 transitions. [2020-10-19 20:08:33,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-19 20:08:33,390 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 777 states and 1133 transitions. [2020-10-19 20:08:33,399 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-10-19 20:08:33,409 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 777 states to 777 states and 1133 transitions. [2020-10-19 20:08:33,410 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 291 [2020-10-19 20:08:33,411 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 291 [2020-10-19 20:08:33,411 INFO L73 IsDeterministic]: Start isDeterministic. Operand 777 states and 1133 transitions. [2020-10-19 20:08:33,412 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 20:08:33,412 INFO L691 BuchiCegarLoop]: Abstraction has 777 states and 1133 transitions. [2020-10-19 20:08:33,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 777 states and 1133 transitions. [2020-10-19 20:08:33,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 777 to 734. [2020-10-19 20:08:33,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 734 states. [2020-10-19 20:08:33,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 1083 transitions. [2020-10-19 20:08:33,436 INFO L714 BuchiCegarLoop]: Abstraction has 734 states and 1083 transitions. [2020-10-19 20:08:33,436 INFO L594 BuchiCegarLoop]: Abstraction has 734 states and 1083 transitions. [2020-10-19 20:08:33,436 INFO L427 BuchiCegarLoop]: ======== Iteration 8============ [2020-10-19 20:08:33,437 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 734 states and 1083 transitions. [2020-10-19 20:08:33,441 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-10-19 20:08:33,442 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 20:08:33,442 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 20:08:33,446 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [13, 12, 10, 9, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2020-10-19 20:08:33,446 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-10-19 20:08:33,448 INFO L794 eck$LassoCheckResult]: Stem: 16564#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(11);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 16555#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 7; 16556#L27 call main_#t~ret9 := fibo(main_~x~0);< 16583#fiboENTRY ~n := #in~n; 16648#L8 assume !(~n < 1); 16647#L10 assume !(1 == ~n); 16643#L13 call #t~ret7 := fibo(~n - 1);< 16646#fiboENTRY ~n := #in~n; 16645#L8 assume !(~n < 1); 16644#L10 assume !(1 == ~n); 16639#L13 call #t~ret7 := fibo(~n - 1);< 16642#fiboENTRY ~n := #in~n; 16641#L8 assume !(~n < 1); 16640#L10 assume !(1 == ~n); 16632#L13 call #t~ret7 := fibo(~n - 1);< 16638#fiboENTRY ~n := #in~n; 16636#L8 assume !(~n < 1); 16634#L10 assume !(1 == ~n); 16620#L13 call #t~ret7 := fibo(~n - 1);< 16625#fiboENTRY ~n := #in~n; 16630#L8 assume !(~n < 1); 16628#L10 assume !(1 == ~n); 16619#L13 call #t~ret7 := fibo(~n - 1);< 16625#fiboENTRY ~n := #in~n; 16631#L8 assume !(~n < 1); 16629#L10 assume 1 == ~n;#res := 1; 16626#fiboFINAL assume true; 16618#fiboEXIT >#35#return; 16611#L13-1 call #t~ret8 := fibo(~n - 2);< 16857#fiboENTRY ~n := #in~n; 16929#L8 assume !(~n < 1); 16610#L10 assume !(1 == ~n); 16612#L13 call #t~ret7 := fibo(~n - 1);< 16622#fiboENTRY ~n := #in~n; 16637#L8 assume !(~n < 1); 17175#L10 assume !(1 == ~n); 16571#L13 call #t~ret7 := fibo(~n - 1);< 17203#fiboENTRY ~n := #in~n; 17227#L8 assume !(~n < 1); 17224#L10 assume 1 == ~n;#res := 1; 17222#fiboFINAL assume true; 17202#fiboEXIT >#35#return; 16661#L13-1 call #t~ret8 := fibo(~n - 2);< 16662#fiboENTRY ~n := #in~n; 17206#L8 assume ~n < 1;#res := 0; 17205#fiboFINAL assume true; 17200#fiboEXIT >#37#return; 16660#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 16913#fiboFINAL assume true; 16892#fiboEXIT >#35#return; 16856#L13-1 call #t~ret8 := fibo(~n - 2);< 16889#fiboENTRY ~n := #in~n; 16971#L8 assume !(~n < 1); 16896#L10 assume !(1 == ~n); 16898#L13 call #t~ret7 := fibo(~n - 1);< 16925#fiboENTRY ~n := #in~n; 16975#L8 assume !(~n < 1); 17005#L10 assume !(1 == ~n); 16961#L13 call #t~ret7 := fibo(~n - 1);< 16964#fiboENTRY ~n := #in~n; 16989#L8 assume !(~n < 1); 16992#L10 assume !(1 == ~n); 16962#L13 [2020-10-19 20:08:33,448 INFO L796 eck$LassoCheckResult]: Loop: 16962#L13 call #t~ret7 := fibo(~n - 1);< 16964#fiboENTRY ~n := #in~n; 16989#L8 assume !(~n < 1); 16992#L10 assume !(1 == ~n); 16962#L13 [2020-10-19 20:08:33,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:08:33,448 INFO L82 PathProgramCache]: Analyzing trace with hash 167551224, now seen corresponding path program 3 times [2020-10-19 20:08:33,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 20:08:33,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980264008] [2020-10-19 20:08:33,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 20:08:33,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:33,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-19 20:08:33,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:33,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-10-19 20:08:33,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:33,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-19 20:08:33,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:33,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-19 20:08:33,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:33,604 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 114 proven. 121 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-10-19 20:08:33,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980264008] [2020-10-19 20:08:33,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102941481] [2020-10-19 20:08:33,604 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 20:08:33,648 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-19 20:08:33,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 20:08:33,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-19 20:08:33,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:33,787 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 141 proven. 19 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2020-10-19 20:08:33,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 20:08:33,788 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2020-10-19 20:08:33,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313022491] [2020-10-19 20:08:33,789 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-19 20:08:33,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:08:33,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1955414, now seen corresponding path program 5 times [2020-10-19 20:08:33,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 20:08:33,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821673922] [2020-10-19 20:08:33,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 20:08:33,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 20:08:33,792 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 20:08:33,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 20:08:33,793 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 20:08:33,794 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 20:08:33,833 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 20:08:33,833 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 20:08:33,833 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 20:08:33,833 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 20:08:33,833 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-19 20:08:33,833 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:33,833 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 20:08:33,833 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 20:08:33,833 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-1.c_Iteration8_Loop [2020-10-19 20:08:33,833 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 20:08:33,834 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 20:08:33,834 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:08:33,836 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:08:33,838 INFO 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 20:08:33,847 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:08:33,911 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 20:08:33,912 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:33,918 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:08:33,918 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 20:08:33,921 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 20:08:33,921 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret7=0} Honda state: {fibo_#t~ret7=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:33,944 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:08:33,944 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 20:08:33,946 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 20:08:33,947 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 20:08:33,970 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:08:33,971 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 63 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:33,998 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-19 20:08:33,998 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-19 20:08:35,388 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-19 20:08:35,390 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 20:08:35,390 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 20:08:35,390 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 20:08:35,390 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 20:08:35,390 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-19 20:08:35,390 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:35,391 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 20:08:35,391 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 20:08:35,391 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-1.c_Iteration8_Loop [2020-10-19 20:08:35,391 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 20:08:35,391 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 20:08:35,392 INFO 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 20:08:35,394 INFO 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 20:08:35,396 INFO 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 20:08:35,403 INFO 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 20:08:35,456 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 20:08:35,456 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:35,459 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 20:08:35,461 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:08:35,461 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:08:35,461 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:08:35,461 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:08:35,461 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:08:35,462 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:08:35,462 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:08:35,463 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 20:08:35,492 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-19 20:08:35,493 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:08:35,493 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:08:35,493 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:08:35,494 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:08:35,494 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:08:35,494 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:08:35,494 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:08:35,495 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:35,518 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 20:08:35,519 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:08:35,519 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:08:35,520 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:08:35,520 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:08:35,520 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:08:35,520 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:08:35,521 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:08:35,523 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-19 20:08:35,524 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2020-10-19 20:08:35,525 INFO L444 ModelExtractionUtils]: 2 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:35,527 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-19 20:08:35,527 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-19 20:08:35,527 INFO L510 LassoAnalysis]: Proved termination. [2020-10-19 20:08:35,527 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2020-10-19 20:08:35,547 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-19 20:08:35,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:08:35,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:35,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-19 20:08:35,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:35,658 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:08:35,660 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:08:35,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:35,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-19 20:08:35,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:35,699 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 20:08:35,700 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 4 loop predicates [2020-10-19 20:08:35,700 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 734 states and 1083 transitions. cyclomatic complexity: 362 Second operand 6 states. [2020-10-19 20:08:35,760 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 734 states and 1083 transitions. cyclomatic complexity: 362. Second operand 6 states. Result 753 states and 1103 transitions. Complement of second has 18 states. [2020-10-19 20:08:35,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2020-10-19 20:08:35,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-19 20:08:35,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 13 transitions. [2020-10-19 20:08:35,762 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 13 transitions. Stem has 62 letters. Loop has 4 letters. [2020-10-19 20:08:35,762 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:08:35,762 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-19 20:08:35,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:08:35,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:35,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-19 20:08:35,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:35,886 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:08:35,893 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:08:35,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:35,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-19 20:08:35,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:35,971 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 20:08:35,972 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 4 loop predicates [2020-10-19 20:08:35,972 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 734 states and 1083 transitions. cyclomatic complexity: 362 Second operand 6 states. [2020-10-19 20:08:36,159 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 734 states and 1083 transitions. cyclomatic complexity: 362. Second operand 6 states. Result 938 states and 1322 transitions. Complement of second has 22 states. [2020-10-19 20:08:36,160 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 20:08:36,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-19 20:08:36,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 16 transitions. [2020-10-19 20:08:36,161 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 62 letters. Loop has 4 letters. [2020-10-19 20:08:36,161 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:08:36,161 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-19 20:08:36,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:08:36,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:36,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-19 20:08:36,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:36,280 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:08:36,282 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:08:36,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:36,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-19 20:08:36,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:36,321 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 20:08:36,322 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 4 loop predicates [2020-10-19 20:08:36,322 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 734 states and 1083 transitions. cyclomatic complexity: 362 Second operand 6 states. [2020-10-19 20:08:36,398 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 734 states and 1083 transitions. cyclomatic complexity: 362. Second operand 6 states. Result 981 states and 1403 transitions. Complement of second has 27 states. [2020-10-19 20:08:36,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2020-10-19 20:08:36,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-19 20:08:36,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 22 transitions. [2020-10-19 20:08:36,399 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 62 letters. Loop has 4 letters. [2020-10-19 20:08:36,401 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:08:36,401 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 66 letters. Loop has 4 letters. [2020-10-19 20:08:36,402 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:08:36,402 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 62 letters. Loop has 8 letters. [2020-10-19 20:08:36,403 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:08:36,403 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 981 states and 1403 transitions. [2020-10-19 20:08:36,412 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-10-19 20:08:36,421 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 981 states to 734 states and 1083 transitions. [2020-10-19 20:08:36,422 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 229 [2020-10-19 20:08:36,422 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 265 [2020-10-19 20:08:36,423 INFO L73 IsDeterministic]: Start isDeterministic. Operand 734 states and 1083 transitions. [2020-10-19 20:08:36,423 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 20:08:36,423 INFO L691 BuchiCegarLoop]: Abstraction has 734 states and 1083 transitions. [2020-10-19 20:08:36,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 734 states and 1083 transitions. [2020-10-19 20:08:36,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 734 to 734. [2020-10-19 20:08:36,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 734 states. [2020-10-19 20:08:36,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 1083 transitions. [2020-10-19 20:08:36,446 INFO L714 BuchiCegarLoop]: Abstraction has 734 states and 1083 transitions. [2020-10-19 20:08:36,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 20:08:36,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-19 20:08:36,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2020-10-19 20:08:36,447 INFO L87 Difference]: Start difference. First operand 734 states and 1083 transitions. Second operand 23 states. [2020-10-19 20:08:36,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 20:08:36,996 INFO L93 Difference]: Finished difference Result 483 states and 671 transitions. [2020-10-19 20:08:36,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-19 20:08:36,997 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 483 states and 671 transitions. [2020-10-19 20:08:37,002 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2020-10-19 20:08:37,007 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 483 states to 402 states and 569 transitions. [2020-10-19 20:08:37,007 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 174 [2020-10-19 20:08:37,008 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 194 [2020-10-19 20:08:37,008 INFO L73 IsDeterministic]: Start isDeterministic. Operand 402 states and 569 transitions. [2020-10-19 20:08:37,012 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 20:08:37,012 INFO L691 BuchiCegarLoop]: Abstraction has 402 states and 569 transitions. [2020-10-19 20:08:37,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states and 569 transitions. [2020-10-19 20:08:37,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 319. [2020-10-19 20:08:37,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 319 states. [2020-10-19 20:08:37,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 440 transitions. [2020-10-19 20:08:37,030 INFO L714 BuchiCegarLoop]: Abstraction has 319 states and 440 transitions. [2020-10-19 20:08:37,030 INFO L594 BuchiCegarLoop]: Abstraction has 319 states and 440 transitions. [2020-10-19 20:08:37,030 INFO L427 BuchiCegarLoop]: ======== Iteration 9============ [2020-10-19 20:08:37,030 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 319 states and 440 transitions. [2020-10-19 20:08:37,033 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2020-10-19 20:08:37,034 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-19 20:08:37,034 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-19 20:08:37,036 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [12, 11, 9, 8, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1] [2020-10-19 20:08:37,036 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-10-19 20:08:37,038 INFO L794 eck$LassoCheckResult]: Stem: 22142#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(11);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 22122#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 7; 22123#L27 call main_#t~ret9 := fibo(main_~x~0);< 22149#fiboENTRY ~n := #in~n; 22241#L8 assume !(~n < 1); 22238#L10 assume !(1 == ~n); 22231#L13 call #t~ret7 := fibo(~n - 1);< 22233#fiboENTRY ~n := #in~n; 22244#L8 assume !(~n < 1); 22240#L10 assume !(1 == ~n); 22235#L13 call #t~ret7 := fibo(~n - 1);< 22236#fiboENTRY ~n := #in~n; 22255#L8 assume !(~n < 1); 22253#L10 assume !(1 == ~n); 22250#L13 call #t~ret7 := fibo(~n - 1);< 22251#fiboENTRY ~n := #in~n; 22277#L8 assume !(~n < 1); 22274#L10 assume !(1 == ~n); 22246#L13 call #t~ret7 := fibo(~n - 1);< 22271#fiboENTRY ~n := #in~n; 22315#L8 assume !(~n < 1); 22314#L10 assume !(1 == ~n); 22262#L13 call #t~ret7 := fibo(~n - 1);< 22280#fiboENTRY ~n := #in~n; 22303#L8 assume !(~n < 1); 22302#L10 assume !(1 == ~n); 22266#L13 call #t~ret7 := fibo(~n - 1);< 22301#fiboENTRY ~n := #in~n; 22372#L8 assume !(~n < 1); 22371#L10 assume 1 == ~n;#res := 1; 22370#fiboFINAL assume true; 22367#fiboEXIT >#35#return; 22364#L13-1 call #t~ret8 := fibo(~n - 2);< 22366#fiboENTRY ~n := #in~n; 22374#L8 assume ~n < 1;#res := 0; 22373#fiboFINAL assume true; 22363#fiboEXIT >#37#return; 22362#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 22359#fiboFINAL assume true; 22304#fiboEXIT >#35#return; 22293#L13-1 call #t~ret8 := fibo(~n - 2);< 22297#fiboENTRY ~n := #in~n; 22312#L8 assume !(~n < 1); 22310#L10 assume 1 == ~n;#res := 1; 22299#fiboFINAL assume true; 22292#fiboEXIT >#37#return; 22260#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 22281#fiboFINAL assume true; 22245#fiboEXIT >#35#return; 22247#L13-1 call #t~ret8 := fibo(~n - 2);< 22268#fiboENTRY ~n := #in~n; 22311#L8 assume !(~n < 1); 22309#L10 assume !(1 == ~n); 22132#L13 call #t~ret7 := fibo(~n - 1);< 22144#fiboENTRY ~n := #in~n; 22285#L8 assume !(~n < 1); 22440#L10 assume !(1 == ~n); 22211#L13 call #t~ret7 := fibo(~n - 1);< 22188#fiboENTRY ~n := #in~n; 22385#L8 assume !(~n < 1); 22384#L10 assume !(1 == ~n); 22210#L13 [2020-10-19 20:08:37,038 INFO L796 eck$LassoCheckResult]: Loop: 22210#L13 call #t~ret7 := fibo(~n - 1);< 22188#fiboENTRY ~n := #in~n; 22385#L8 assume !(~n < 1); 22384#L10 assume !(1 == ~n); 22210#L13 [2020-10-19 20:08:37,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:08:37,039 INFO L82 PathProgramCache]: Analyzing trace with hash -686810473, now seen corresponding path program 4 times [2020-10-19 20:08:37,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 20:08:37,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673590785] [2020-10-19 20:08:37,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 20:08:37,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:37,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-19 20:08:37,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:37,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-19 20:08:37,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:37,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-19 20:08:37,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:37,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-19 20:08:37,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:37,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-19 20:08:37,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:37,268 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 126 proven. 64 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-19 20:08:37,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673590785] [2020-10-19 20:08:37,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48751393] [2020-10-19 20:08:37,269 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 20:08:37,314 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-19 20:08:37,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 20:08:37,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-19 20:08:37,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:37,386 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 126 proven. 64 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-19 20:08:37,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 20:08:37,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 18 [2020-10-19 20:08:37,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945817527] [2020-10-19 20:08:37,387 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-19 20:08:37,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:08:37,387 INFO L82 PathProgramCache]: Analyzing trace with hash 1955414, now seen corresponding path program 6 times [2020-10-19 20:08:37,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 20:08:37,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69577436] [2020-10-19 20:08:37,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 20:08:37,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 20:08:37,389 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 20:08:37,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 20:08:37,390 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 20:08:37,391 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 20:08:37,439 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 20:08:37,440 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 20:08:37,440 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 20:08:37,440 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 20:08:37,440 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-19 20:08:37,440 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:37,440 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 20:08:37,440 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 20:08:37,441 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-1.c_Iteration9_Loop [2020-10-19 20:08:37,441 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 20:08:37,441 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 20:08:37,442 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:08:37,445 INFO 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 20:08:37,448 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 20:08:37,451 INFO 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 20:08:37,529 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 20:08:37,530 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 20:08:37,535 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:08:37,535 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 70 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:37,540 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 20:08:37,540 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret8=0} Honda state: {fibo_#t~ret8=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 20:08:37,591 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:08:37,592 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 71 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:37,595 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 20:08:37,595 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 20:08:37,652 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:08:37,652 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 72 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:37,655 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-19 20:08:37,655 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret7=0} Honda state: {fibo_#t~ret7=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 20:08:37,713 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-19 20:08:37,713 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 73 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 20:08:37,778 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-19 20:08:37,778 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 74 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:44,627 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-19 20:08:44,630 INFO L210 LassoAnalysis]: Preferences: [2020-10-19 20:08:44,630 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-19 20:08:44,630 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-19 20:08:44,630 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-19 20:08:44,630 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-19 20:08:44,630 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:44,630 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-19 20:08:44,630 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-19 20:08:44,630 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-1.c_Iteration9_Loop [2020-10-19 20:08:44,631 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-19 20:08:44,631 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-19 20:08:44,632 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:08:44,634 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:08:44,636 INFO 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 20:08:44,643 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-19 20:08:44,697 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-19 20:08:44,697 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-19 20:08:44,705 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 20:08:44,706 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:08:44,706 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:08:44,706 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:08:44,706 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:08:44,707 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:08:44,707 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:08:44,707 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 75 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:44,709 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:44,731 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 20:08:44,733 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:08:44,733 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:08:44,733 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:08:44,733 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:08:44,733 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:08:44,733 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:08:44,734 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:08:44,740 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:44,762 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 20:08:44,763 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-19 20:08:44,763 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-19 20:08:44,763 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-19 20:08:44,764 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-19 20:08:44,764 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-19 20:08:44,764 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-19 20:08:44,764 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-19 20:08:44,767 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-19 20:08:44,769 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2020-10-19 20:08:44,769 INFO L444 ModelExtractionUtils]: 2 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-19 20:08:44,771 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-19 20:08:44,771 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-19 20:08:44,771 INFO L510 LassoAnalysis]: Proved termination. [2020-10-19 20:08:44,771 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2020-10-19 20:08:44,792 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-19 20:08:44,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:08:44,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:44,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-19 20:08:44,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:44,893 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:08:44,896 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:08:44,899 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:08:44,905 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:08:44,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:44,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-19 20:08:44,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:44,944 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 20:08:44,944 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 4 loop predicates [2020-10-19 20:08:44,944 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 319 states and 440 transitions. cyclomatic complexity: 125 Second operand 6 states. [2020-10-19 20:08:45,001 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 319 states and 440 transitions. cyclomatic complexity: 125. Second operand 6 states. Result 338 states and 460 transitions. Complement of second has 18 states. [2020-10-19 20:08:45,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2020-10-19 20:08:45,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-19 20:08:45,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 13 transitions. [2020-10-19 20:08:45,002 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 13 transitions. Stem has 61 letters. Loop has 4 letters. [2020-10-19 20:08:45,002 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:08:45,002 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-19 20:08:45,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:08:45,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:45,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-19 20:08:45,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:45,097 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:08:45,099 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:08:45,101 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:08:45,103 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:08:45,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:45,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-19 20:08:45,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:45,143 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 20:08:45,143 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 4 loop predicates [2020-10-19 20:08:45,143 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 319 states and 440 transitions. cyclomatic complexity: 125 Second operand 6 states. [2020-10-19 20:08:45,236 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 319 states and 440 transitions. cyclomatic complexity: 125. Second operand 6 states. Result 344 states and 466 transitions. Complement of second has 17 states. [2020-10-19 20:08:45,237 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 20:08:45,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-19 20:08:45,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 16 transitions. [2020-10-19 20:08:45,238 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 61 letters. Loop has 4 letters. [2020-10-19 20:08:45,239 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:08:45,239 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-19 20:08:45,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 20:08:45,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:45,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-19 20:08:45,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:45,343 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:08:45,348 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:08:45,351 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:08:45,353 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-19 20:08:45,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 20:08:45,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-19 20:08:45,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 20:08:45,395 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 20:08:45,396 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 4 loop predicates [2020-10-19 20:08:45,396 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 319 states and 440 transitions. cyclomatic complexity: 125 Second operand 6 states. [2020-10-19 20:08:45,463 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 319 states and 440 transitions. cyclomatic complexity: 125. Second operand 6 states. Result 421 states and 565 transitions. Complement of second has 27 states. [2020-10-19 20:08:45,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2020-10-19 20:08:45,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-19 20:08:45,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 22 transitions. [2020-10-19 20:08:45,464 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 61 letters. Loop has 4 letters. [2020-10-19 20:08:45,465 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:08:45,465 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 65 letters. Loop has 4 letters. [2020-10-19 20:08:45,465 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:08:45,466 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 61 letters. Loop has 8 letters. [2020-10-19 20:08:45,466 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-19 20:08:45,466 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 421 states and 565 transitions. [2020-10-19 20:08:45,470 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2020-10-19 20:08:45,474 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 421 states to 323 states and 445 transitions. [2020-10-19 20:08:45,475 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 124 [2020-10-19 20:08:45,475 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 136 [2020-10-19 20:08:45,475 INFO L73 IsDeterministic]: Start isDeterministic. Operand 323 states and 445 transitions. [2020-10-19 20:08:45,475 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-19 20:08:45,476 INFO L691 BuchiCegarLoop]: Abstraction has 323 states and 445 transitions. [2020-10-19 20:08:45,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states and 445 transitions. [2020-10-19 20:08:45,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 319. [2020-10-19 20:08:45,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 319 states. [2020-10-19 20:08:45,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 440 transitions. [2020-10-19 20:08:45,489 INFO L714 BuchiCegarLoop]: Abstraction has 319 states and 440 transitions. [2020-10-19 20:08:45,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 20:08:45,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-19 20:08:45,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2020-10-19 20:08:45,491 INFO L87 Difference]: Start difference. First operand 319 states and 440 transitions. Second operand 18 states. [2020-10-19 20:08:45,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 20:08:45,847 INFO L93 Difference]: Finished difference Result 288 states and 361 transitions. [2020-10-19 20:08:45,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-19 20:08:45,848 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 288 states and 361 transitions. [2020-10-19 20:08:45,852 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-10-19 20:08:45,852 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 288 states to 0 states and 0 transitions. [2020-10-19 20:08:45,852 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2020-10-19 20:08:45,852 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2020-10-19 20:08:45,852 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2020-10-19 20:08:45,853 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-19 20:08:45,853 INFO L691 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-19 20:08:45,853 INFO L714 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-19 20:08:45,853 INFO L594 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-19 20:08:45,853 INFO L427 BuchiCegarLoop]: ======== Iteration 10============ [2020-10-19 20:08:45,853 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2020-10-19 20:08:45,854 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-10-19 20:08:45,854 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2020-10-19 20:08:45,862 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 19.10 08:08:45 BoogieIcfgContainer [2020-10-19 20:08:45,862 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2020-10-19 20:08:45,864 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-19 20:08:45,864 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-19 20:08:45,864 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-19 20:08:45,865 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 08:08:12" (3/4) ... [2020-10-19 20:08:45,872 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-10-19 20:08:45,872 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-19 20:08:45,876 INFO L168 Benchmark]: Toolchain (without parser) took 34503.16 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 318.8 MB). Free memory was 958.6 MB in the beginning and 804.1 MB in the end (delta: 154.6 MB). Peak memory consumption was 473.3 MB. Max. memory is 11.5 GB. [2020-10-19 20:08:45,877 INFO L168 Benchmark]: CDTParser took 0.28 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 20:08:45,877 INFO L168 Benchmark]: CACSL2BoogieTranslator took 257.30 ms. Allocated memory is still 1.0 GB. Free memory was 958.6 MB in the beginning and 946.5 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 11.5 GB. [2020-10-19 20:08:45,883 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.35 ms. Allocated memory is still 1.0 GB. Free memory was 946.5 MB in the beginning and 941.2 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2020-10-19 20:08:45,885 INFO L168 Benchmark]: Boogie Preprocessor took 81.44 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 78.6 MB). Free memory was 941.2 MB in the beginning and 1.1 GB in the end (delta: -132.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 11.5 GB. [2020-10-19 20:08:45,885 INFO L168 Benchmark]: RCFGBuilder took 278.77 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: 20.3 MB). Peak memory consumption was 20.3 MB. Max. memory is 11.5 GB. [2020-10-19 20:08:45,888 INFO L168 Benchmark]: BuchiAutomizer took 33829.82 ms. Allocated memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: 240.1 MB). Free memory was 1.1 GB in the beginning and 804.1 MB in the end (delta: 249.7 MB). Peak memory consumption was 489.9 MB. Max. memory is 11.5 GB. [2020-10-19 20:08:45,889 INFO L168 Benchmark]: Witness Printer took 8.23 ms. Allocated memory is still 1.3 GB. Free memory is still 804.1 MB. There was no memory consumed. Max. memory is 11.5 GB. [2020-10-19 20:08:45,895 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 257.30 ms. Allocated memory is still 1.0 GB. Free memory was 958.6 MB in the beginning and 946.5 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 35.35 ms. Allocated memory is still 1.0 GB. Free memory was 946.5 MB in the beginning and 941.2 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 81.44 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 78.6 MB). Free memory was 941.2 MB in the beginning and 1.1 GB in the end (delta: -132.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 11.5 GB. * RCFGBuilder took 278.77 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: 20.3 MB). Peak memory consumption was 20.3 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 33829.82 ms. Allocated memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: 240.1 MB). Free memory was 1.1 GB in the beginning and 804.1 MB in the end (delta: 249.7 MB). Peak memory consumption was 489.9 MB. Max. memory is 11.5 GB. * Witness Printer took 8.23 ms. Allocated memory is still 1.3 GB. Free memory is still 804.1 MB. 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 16 terminating modules (8 trivial, 3 deterministic, 5 nondeterministic). One deterministic module has affine ranking function \old(n) and consists of 4 locations. One deterministic module has affine ranking function n and consists of 10 locations. One deterministic module has affine ranking function n and consists of 7 locations. One nondeterministic module has affine ranking function n and consists of 9 locations. One nondeterministic module has affine ranking function \old(n) and consists of 5 locations. One nondeterministic module has affine ranking function n and consists of 6 locations. One nondeterministic module has affine ranking function n and consists of 6 locations. One nondeterministic module has affine ranking function n and consists of 6 locations. 8 modules have a trivial ranking function, the largest among these consists of 23 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 33.7s and 10 iterations. TraceHistogramMax:13. Analysis of lassos took 25.0s. Construction of modules took 1.8s. Büchi inclusion checks took 5.8s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 15. Automata minimization 0.3s AutomataMinimizationTime, 15 MinimizatonAttempts, 397 StatesRemovedByMinimization, 12 NontrivialMinimizations. Non-live state removal took 0.3s Buchi closure took 0.0s. Biggest automaton had 734 states and ocurred in iteration 7. Nontrivial modules had stage [2, 1, 5, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 8/26 HoareTripleCheckerStatistics: 353 SDtfs, 816 SDslu, 587 SDs, 0 SdLazy, 1984 SolverSat, 565 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.8s Time LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT1 conc0 concLT0 SILN0 SILU0 SILI1 SILT7 lasso0 LassoPreprocessingBenchmarks: Lassos: inital17 mio100 ax100 hnf91 lsp95 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq185 hnf92 smp80 dnf100 smp100 tf109 neg96 sie107 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 32ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 18 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 8 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 19.1s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...