./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/recursive-simple/fibo_7-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 9a8b2e8d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerTermination.xml -i ../sv-benchmarks/c/recursive-simple/fibo_7-2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(F end) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b2c28e4a28eb31322d66c263b5716511ec5353f2 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-9a8b2e8 [2020-10-20 08:01:06,937 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 08:01:06,940 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 08:01:06,981 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 08:01:06,981 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 08:01:06,991 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 08:01:06,994 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 08:01:06,997 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 08:01:07,000 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 08:01:07,003 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 08:01:07,005 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 08:01:07,006 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 08:01:07,007 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 08:01:07,010 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 08:01:07,011 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 08:01:07,013 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 08:01:07,015 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 08:01:07,016 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 08:01:07,018 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 08:01:07,025 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 08:01:07,027 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 08:01:07,028 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 08:01:07,030 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 08:01:07,031 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 08:01:07,044 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 08:01:07,048 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 08:01:07,057 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 08:01:07,058 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 08:01:07,058 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 08:01:07,059 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 08:01:07,059 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 08:01:07,063 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 08:01:07,063 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 08:01:07,064 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 08:01:07,066 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 08:01:07,070 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 08:01:07,071 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 08:01:07,071 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 08:01:07,071 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 08:01:07,072 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 08:01:07,073 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 08:01:07,075 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-32bit-Automizer_Default.epf [2020-10-20 08:01:07,114 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 08:01:07,114 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 08:01:07,116 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 08:01:07,116 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 08:01:07,116 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 08:01:07,117 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2020-10-20 08:01:07,117 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2020-10-20 08:01:07,117 INFO L138 SettingsManager]: * Use old map elimination=false [2020-10-20 08:01:07,117 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2020-10-20 08:01:07,118 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2020-10-20 08:01:07,119 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2020-10-20 08:01:07,119 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 08:01:07,119 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-20 08:01:07,120 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-10-20 08:01:07,120 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-20 08:01:07,120 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-20 08:01:07,120 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 08:01:07,121 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2020-10-20 08:01:07,121 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2020-10-20 08:01:07,121 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2020-10-20 08:01:07,122 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-20 08:01:07,122 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-20 08:01:07,122 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2020-10-20 08:01:07,122 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 08:01:07,122 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2020-10-20 08:01:07,123 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 08:01:07,123 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 08:01:07,123 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2020-10-20 08:01:07,124 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 08:01:07,124 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-20 08:01:07,124 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 08:01:07,124 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2020-10-20 08:01:07,126 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2020-10-20 08:01:07,126 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 -> b2c28e4a28eb31322d66c263b5716511ec5353f2 [2020-10-20 08:01:07,356 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 08:01:07,368 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 08:01:07,372 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 08:01:07,374 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 08:01:07,374 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 08:01:07,375 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/fibo_7-2.c [2020-10-20 08:01:07,435 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/27639640c/fe489f43c9a24b62bd9ab34fc5bacbff/FLAG2f0ae77e6 [2020-10-20 08:01:07,852 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 08:01:07,853 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/fibo_7-2.c [2020-10-20 08:01:07,859 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/27639640c/fe489f43c9a24b62bd9ab34fc5bacbff/FLAG2f0ae77e6 [2020-10-20 08:01:08,256 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/27639640c/fe489f43c9a24b62bd9ab34fc5bacbff [2020-10-20 08:01:08,271 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 08:01:08,277 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-20 08:01:08,280 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 08:01:08,280 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 08:01:08,284 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 08:01:08,285 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 08:01:08" (1/1) ... [2020-10-20 08:01:08,289 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c08cbaf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 08:01:08, skipping insertion in model container [2020-10-20 08:01:08,290 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 08:01:08" (1/1) ... [2020-10-20 08:01:08,298 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 08:01:08,318 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 08:01:08,564 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 08:01:08,583 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 08:01:08,603 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 08:01:08,628 INFO L208 MainTranslator]: Completed translation [2020-10-20 08:01:08,628 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 08:01:08 WrapperNode [2020-10-20 08:01:08,630 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 08:01:08,631 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-20 08:01:08,632 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-20 08:01:08,632 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-20 08:01:08,643 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 08:01:08" (1/1) ... [2020-10-20 08:01:08,654 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 08:01:08" (1/1) ... [2020-10-20 08:01:08,677 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-20 08:01:08,678 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 08:01:08,679 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 08:01:08,679 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 08:01:08,689 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 08:01:08" (1/1) ... [2020-10-20 08:01:08,690 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 08:01:08" (1/1) ... [2020-10-20 08:01:08,692 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 08:01:08" (1/1) ... [2020-10-20 08:01:08,692 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 08:01:08" (1/1) ... [2020-10-20 08:01:08,698 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 08:01:08" (1/1) ... [2020-10-20 08:01:08,701 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 08:01:08" (1/1) ... [2020-10-20 08:01:08,707 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 08:01:08" (1/1) ... [2020-10-20 08:01:08,710 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 08:01:08,711 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 08:01:08,711 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 08:01:08,712 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 08:01:08,713 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 08:01:08" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:08,788 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 08:01:08,788 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 08:01:08,788 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-20 08:01:08,789 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-20 08:01:08,789 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2020-10-20 08:01:08,790 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2020-10-20 08:01:08,992 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 08:01:08,993 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-20 08:01:08,995 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 08:01:08 BoogieIcfgContainer [2020-10-20 08:01:08,995 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 08:01:08,996 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2020-10-20 08:01:08,996 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2020-10-20 08:01:09,000 INFO L275 PluginConnector]: BuchiAutomizer initialized [2020-10-20 08:01:09,001 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-20 08:01:09,002 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 20.10 08:01:08" (1/3) ... [2020-10-20 08:01:09,003 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@e256c75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 20.10 08:01:09, skipping insertion in model container [2020-10-20 08:01:09,003 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-20 08:01:09,004 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 08:01:08" (2/3) ... [2020-10-20 08:01:09,004 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@e256c75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 20.10 08:01:09, skipping insertion in model container [2020-10-20 08:01:09,004 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-20 08:01:09,005 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 08:01:08" (3/3) ... [2020-10-20 08:01:09,007 INFO L373 chiAutomizerObserver]: Analyzing ICFG fibo_7-2.c [2020-10-20 08:01:09,087 INFO L359 BuchiCegarLoop]: Interprodecural is true [2020-10-20 08:01:09,087 INFO L360 BuchiCegarLoop]: Hoare is false [2020-10-20 08:01:09,088 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2020-10-20 08:01:09,088 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 08:01:09,088 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 08:01:09,088 INFO L364 BuchiCegarLoop]: Difference is false [2020-10-20 08:01:09,088 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 08:01:09,089 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2020-10-20 08:01:09,111 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 19 states. [2020-10-20 08:01:09,146 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-10-20 08:01:09,146 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 08:01:09,147 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 08:01:09,161 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2020-10-20 08:01:09,161 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-10-20 08:01:09,161 INFO L427 BuchiCegarLoop]: ======== Iteration 1============ [2020-10-20 08:01:09,162 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 19 states. [2020-10-20 08:01:09,172 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-10-20 08:01:09,174 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 08:01:09,174 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 08:01:09,175 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2020-10-20 08:01:09,175 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-10-20 08:01:09,187 INFO L794 eck$LassoCheckResult]: Stem: 13#ULTIMATE.startENTRYtrue #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(11);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 11#L-1true havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 7; 8#L27true call main_#t~ret9 := fibo(main_~x~0);< 16#fiboENTRYtrue [2020-10-20 08:01:09,187 INFO L796 eck$LassoCheckResult]: Loop: 16#fiboENTRYtrue ~n := #in~n; 14#L8true assume !(~n < 1); 18#L10true assume !(1 == ~n); 7#L13true call #t~ret7 := fibo(~n - 1);< 16#fiboENTRYtrue [2020-10-20 08:01:09,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:09,196 INFO L82 PathProgramCache]: Analyzing trace with hash 29885, now seen corresponding path program 1 times [2020-10-20 08:01:09,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:01:09,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032624568] [2020-10-20 08:01:09,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:01:09,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:01:09,320 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:01:09,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:01:09,339 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:01:09,370 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 08:01:09,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:09,372 INFO L82 PathProgramCache]: Analyzing trace with hash 1512524, now seen corresponding path program 1 times [2020-10-20 08:01:09,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:01:09,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147656288] [2020-10-20 08:01:09,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:01:09,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:01:09,379 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:01:09,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:01:09,383 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:01:09,385 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 08:01:09,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:09,387 INFO L82 PathProgramCache]: Analyzing trace with hash 1830210312, now seen corresponding path program 1 times [2020-10-20 08:01:09,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:01:09,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735834242] [2020-10-20 08:01:09,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:01:09,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:01:09,407 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:01:09,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:01:09,439 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:01:09,453 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 08:01:09,559 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 08:01:09,560 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 08:01:09,560 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 08:01:09,561 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 08:01:09,561 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-20 08:01:09,561 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:09,562 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 08:01:09,562 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 08:01:09,562 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-2.c_Iteration1_Loop [2020-10-20 08:01:09,562 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 08:01:09,563 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 08:01:09,580 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:09,590 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:09,594 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:09,599 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:09,604 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:09,687 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 08:01:09,688 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 [2020-10-20 08:01:09,695 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:01:09,695 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:01:09,705 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:01:09,706 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) [2020-10-20 08:01:09,746 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:01:09,746 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:09,750 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:01:09,750 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:01:09,789 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:01:09,789 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:09,795 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:01:09,796 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret7=0} Honda state: {fibo_#t~ret7=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:09,824 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:01:09,824 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:01:09,828 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:01:09,828 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret8=0} Honda state: {fibo_#t~ret8=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:09,853 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:01:09,853 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:09,879 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-20 08:01:09,879 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:01:09,914 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-20 08:01:09,916 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 08:01:09,916 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 08:01:09,916 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 08:01:09,916 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 08:01:09,916 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-20 08:01:09,917 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:09,917 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 08:01:09,917 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 08:01:09,917 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-2.c_Iteration1_Loop [2020-10-20 08:01:09,917 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 08:01:09,917 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 08:01:09,919 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:09,922 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:09,925 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:09,928 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:09,931 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:09,997 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 08:01:10,002 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:01:10,023 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 08:01:10,025 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:10,026 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:10,027 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:10,027 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:10,027 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:10,030 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:10,030 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:10,034 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:01:10,081 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 08:01:10,083 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:10,084 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:10,084 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:10,084 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:10,085 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:10,086 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:10,086 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:10,088 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:01:10,134 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 08:01:10,136 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:10,137 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:10,137 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:10,137 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:10,137 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:10,138 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:10,139 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:10,141 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:01:10,189 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 08:01:10,192 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:10,192 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:10,192 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:10,192 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:10,193 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:10,194 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:10,194 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:10,196 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:01:10,240 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 08:01:10,242 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:10,242 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:10,242 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:10,242 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:10,242 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:10,244 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:10,244 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:10,248 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-20 08:01:10,254 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-20 08:01:10,254 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:01:10,261 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-20 08:01:10,261 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-20 08:01:10,261 INFO L510 LassoAnalysis]: Proved termination. [2020-10-20 08:01:10,262 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_#in~n) = 1*fibo_#in~n Supporting invariants [] Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:10,287 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-20 08:01:10,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:10,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:10,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-20 08:01:10,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:10,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:10,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-20 08:01:10,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:10,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 08:01:10,440 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2020-10-20 08:01:10,442 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 19 states. Second operand 4 states. [2020-10-20 08:01:10,575 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 19 states.. Second operand 4 states. Result 49 states and 61 transitions. Complement of second has 12 states. [2020-10-20 08:01:10,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2020-10-20 08:01:10,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-10-20 08:01:10,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 11 transitions. [2020-10-20 08:01:10,582 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 3 letters. Loop has 4 letters. [2020-10-20 08:01:10,584 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:10,584 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 7 letters. Loop has 4 letters. [2020-10-20 08:01:10,585 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:10,585 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 3 letters. Loop has 8 letters. [2020-10-20 08:01:10,585 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:10,587 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 49 states and 61 transitions. [2020-10-20 08:01:10,592 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-10-20 08:01:10,601 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 49 states to 25 states and 34 transitions. [2020-10-20 08:01:10,603 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 17 [2020-10-20 08:01:10,603 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 18 [2020-10-20 08:01:10,604 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 34 transitions. [2020-10-20 08:01:10,605 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 08:01:10,605 INFO L691 BuchiCegarLoop]: Abstraction has 25 states and 34 transitions. [2020-10-20 08:01:10,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states and 34 transitions. [2020-10-20 08:01:10,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 20. [2020-10-20 08:01:10,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-20 08:01:10,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 26 transitions. [2020-10-20 08:01:10,643 INFO L714 BuchiCegarLoop]: Abstraction has 20 states and 26 transitions. [2020-10-20 08:01:10,643 INFO L594 BuchiCegarLoop]: Abstraction has 20 states and 26 transitions. [2020-10-20 08:01:10,644 INFO L427 BuchiCegarLoop]: ======== Iteration 2============ [2020-10-20 08:01:10,644 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 20 states and 26 transitions. [2020-10-20 08:01:10,645 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-10-20 08:01:10,645 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 08:01:10,646 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 08:01:10,647 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 08:01:10,647 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 08:01:10,648 INFO L794 eck$LassoCheckResult]: Stem: 132#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(11);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 130#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 7; 128#L27 call main_#t~ret9 := fibo(main_~x~0);< 138#fiboENTRY ~n := #in~n; 136#L8 assume !(~n < 1); 137#L10 assume !(1 == ~n); 125#L13 call #t~ret7 := fibo(~n - 1);< 131#fiboENTRY ~n := #in~n; 133#L8 assume ~n < 1;#res := 0; 134#fiboFINAL assume true; 124#fiboEXIT >#35#return; 126#L13-1 [2020-10-20 08:01:10,648 INFO L796 eck$LassoCheckResult]: Loop: 126#L13-1 call #t~ret8 := fibo(~n - 2);< 129#fiboENTRY ~n := #in~n; 143#L8 assume !(~n < 1); 142#L10 assume !(1 == ~n); 127#L13 call #t~ret7 := fibo(~n - 1);< 129#fiboENTRY ~n := #in~n; 143#L8 assume ~n < 1;#res := 0; 140#fiboFINAL assume true; 141#fiboEXIT >#35#return; 126#L13-1 [2020-10-20 08:01:10,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:10,648 INFO L82 PathProgramCache]: Analyzing trace with hash 523436175, now seen corresponding path program 1 times [2020-10-20 08:01:10,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:01:10,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950751393] [2020-10-20 08:01:10,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:01:10,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:10,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-20 08:01:10,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:10,791 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-20 08:01:10,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950751393] [2020-10-20 08:01:10,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 08:01:10,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-20 08:01:10,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169263968] [2020-10-20 08:01:10,797 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-20 08:01:10,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:10,798 INFO L82 PathProgramCache]: Analyzing trace with hash 1950983701, now seen corresponding path program 1 times [2020-10-20 08:01:10,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:01:10,798 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052321472] [2020-10-20 08:01:10,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:01:10,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:10,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-10-20 08:01:10,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:10,846 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-20 08:01:10,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052321472] [2020-10-20 08:01:10,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 08:01:10,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-20 08:01:10,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253353697] [2020-10-20 08:01:10,848 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-10-20 08:01:10,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 08:01:10,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-20 08:01:10,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-20 08:01:10,854 INFO L87 Difference]: Start difference. First operand 20 states and 26 transitions. cyclomatic complexity: 8 Second operand 6 states. [2020-10-20 08:01:10,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 08:01:10,935 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2020-10-20 08:01:10,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-20 08:01:10,937 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 26 states and 32 transitions. [2020-10-20 08:01:10,939 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-10-20 08:01:10,941 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 26 states to 24 states and 30 transitions. [2020-10-20 08:01:10,941 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 20 [2020-10-20 08:01:10,941 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 20 [2020-10-20 08:01:10,941 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 30 transitions. [2020-10-20 08:01:10,942 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 08:01:10,942 INFO L691 BuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2020-10-20 08:01:10,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states and 30 transitions. [2020-10-20 08:01:10,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-20 08:01:10,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-20 08:01:10,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2020-10-20 08:01:10,948 INFO L714 BuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2020-10-20 08:01:10,948 INFO L594 BuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2020-10-20 08:01:10,948 INFO L427 BuchiCegarLoop]: ======== Iteration 3============ [2020-10-20 08:01:10,948 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 24 states and 30 transitions. [2020-10-20 08:01:10,956 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-10-20 08:01:10,956 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 08:01:10,957 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 08:01:10,958 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 08:01:10,959 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2020-10-20 08:01:10,959 INFO L794 eck$LassoCheckResult]: Stem: 205#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(11);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 200#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 7; 201#L27 call main_#t~ret9 := fibo(main_~x~0);< 208#fiboENTRY ~n := #in~n; 211#L8 assume !(~n < 1); 212#L10 assume !(1 == ~n); 198#L13 call #t~ret7 := fibo(~n - 1);< 204#fiboENTRY ~n := #in~n; 209#L8 assume !(~n < 1); 210#L10 assume 1 == ~n;#res := 1; 213#fiboFINAL assume true; 197#fiboEXIT >#35#return; 199#L13-1 [2020-10-20 08:01:10,959 INFO L796 eck$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 [2020-10-20 08:01:10,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:10,960 INFO L82 PathProgramCache]: Analyzing trace with hash -953322862, now seen corresponding path program 1 times [2020-10-20 08:01:10,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:01:10,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201949492] [2020-10-20 08:01:10,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:01:10,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:10,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-20 08:01:11,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:11,021 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 08:01:11,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201949492] [2020-10-20 08:01:11,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926816332] [2020-10-20 08:01:11,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 08:01:11,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:11,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-20 08:01:11,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:11,100 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 08:01:11,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 08:01:11,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-20 08:01:11,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874538537] [2020-10-20 08:01:11,102 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-20 08:01:11,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:11,103 INFO L82 PathProgramCache]: Analyzing trace with hash -2000232554, now seen corresponding path program 1 times [2020-10-20 08:01:11,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:01:11,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813008154] [2020-10-20 08:01:11,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:01:11,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:01:11,113 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:01:11,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:01:11,121 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:01:11,124 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 08:01:11,367 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 08:01:11,368 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 08:01:11,368 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 08:01:11,368 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 08:01:11,368 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-20 08:01:11,368 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:11,368 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 08:01:11,368 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 08:01:11,368 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-2.c_Iteration3_Loop [2020-10-20 08:01:11,368 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 08:01:11,369 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 08:01:11,370 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:11,373 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:11,376 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:11,378 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:11,430 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 08:01:11,430 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:01:11,443 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:01:11,443 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:11,447 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:01:11,447 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret7=1} Honda state: {fibo_#t~ret7=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:01:11,491 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:01:11,491 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:11,495 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:01:11,495 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) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:11,536 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:01:11,536 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:01:11,540 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:01:11,540 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 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:11,577 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:01:11,577 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:01:11,620 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-20 08:01:11,620 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:12,670 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-20 08:01:12,672 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 08:01:12,673 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 08:01:12,673 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 08:01:12,673 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 08:01:12,673 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-20 08:01:12,673 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:12,673 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 08:01:12,673 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 08:01:12,674 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-2.c_Iteration3_Loop [2020-10-20 08:01:12,674 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 08:01:12,674 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 08:01:12,675 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:12,678 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:12,680 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:12,688 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:12,739 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 08:01:12,739 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) [2020-10-20 08:01:12,759 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 08:01:12,761 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:12,761 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:12,761 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:12,761 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:12,761 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:12,762 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:12,762 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 [2020-10-20 08:01:12,767 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:01:12,818 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 08:01:12,819 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:12,819 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:12,820 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:12,820 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:12,820 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:12,821 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:12,821 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:12,823 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 [2020-10-20 08:01:12,865 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 08:01:12,866 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:12,867 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:12,867 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:12,867 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:12,867 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:12,869 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:12,869 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:12,872 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-20 08:01:12,877 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-20 08:01:12,877 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:01:12,880 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-20 08:01:12,880 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-20 08:01:12,881 INFO L510 LassoAnalysis]: Proved termination. [2020-10-20 08:01:12,881 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:12,926 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-20 08:01:12,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:12,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:12,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-20 08:01:12,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:13,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:13,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-20 08:01:13,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:13,218 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-20 08:01:13,219 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 7 loop predicates [2020-10-20 08:01:13,219 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 24 states and 30 transitions. cyclomatic complexity: 8 Second operand 9 states. [2020-10-20 08:01:13,503 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 24 states and 30 transitions. cyclomatic complexity: 8. Second operand 9 states. Result 159 states and 215 transitions. Complement of second has 48 states. [2020-10-20 08:01:13,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 10 states 2 stem states 7 non-accepting loop states 1 accepting loop states [2020-10-20 08:01:13,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-10-20 08:01:13,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 41 transitions. [2020-10-20 08:01:13,505 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 41 transitions. Stem has 12 letters. Loop has 22 letters. [2020-10-20 08:01:13,506 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:13,506 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 41 transitions. Stem has 34 letters. Loop has 22 letters. [2020-10-20 08:01:13,507 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:13,507 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 41 transitions. Stem has 12 letters. Loop has 44 letters. [2020-10-20 08:01:13,509 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:13,509 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 159 states and 215 transitions. [2020-10-20 08:01:13,518 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 15 [2020-10-20 08:01:13,524 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 159 states to 128 states and 180 transitions. [2020-10-20 08:01:13,524 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 74 [2020-10-20 08:01:13,525 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 79 [2020-10-20 08:01:13,525 INFO L73 IsDeterministic]: Start isDeterministic. Operand 128 states and 180 transitions. [2020-10-20 08:01:13,526 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 08:01:13,526 INFO L691 BuchiCegarLoop]: Abstraction has 128 states and 180 transitions. [2020-10-20 08:01:13,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states and 180 transitions. [2020-10-20 08:01:13,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 106. [2020-10-20 08:01:13,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-20 08:01:13,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 140 transitions. [2020-10-20 08:01:13,550 INFO L714 BuchiCegarLoop]: Abstraction has 106 states and 140 transitions. [2020-10-20 08:01:13,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 08:01:13,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-20 08:01:13,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-20 08:01:13,551 INFO L87 Difference]: Start difference. First operand 106 states and 140 transitions. Second operand 8 states. [2020-10-20 08:01:13,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 08:01:13,670 INFO L93 Difference]: Finished difference Result 125 states and 167 transitions. [2020-10-20 08:01:13,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-20 08:01:13,671 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 125 states and 167 transitions. [2020-10-20 08:01:13,675 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 15 [2020-10-20 08:01:13,679 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 125 states to 122 states and 164 transitions. [2020-10-20 08:01:13,680 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 77 [2020-10-20 08:01:13,680 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 77 [2020-10-20 08:01:13,680 INFO L73 IsDeterministic]: Start isDeterministic. Operand 122 states and 164 transitions. [2020-10-20 08:01:13,681 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 08:01:13,681 INFO L691 BuchiCegarLoop]: Abstraction has 122 states and 164 transitions. [2020-10-20 08:01:13,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states and 164 transitions. [2020-10-20 08:01:13,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 106. [2020-10-20 08:01:13,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-20 08:01:13,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 139 transitions. [2020-10-20 08:01:13,695 INFO L714 BuchiCegarLoop]: Abstraction has 106 states and 139 transitions. [2020-10-20 08:01:13,695 INFO L594 BuchiCegarLoop]: Abstraction has 106 states and 139 transitions. [2020-10-20 08:01:13,695 INFO L427 BuchiCegarLoop]: ======== Iteration 4============ [2020-10-20 08:01:13,695 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 106 states and 139 transitions. [2020-10-20 08:01:13,697 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 15 [2020-10-20 08:01:13,697 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 08:01:13,698 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 08:01:13,699 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [5, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 08:01:13,699 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1] [2020-10-20 08:01:13,699 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 [2020-10-20 08:01:13,699 INFO L796 eck$LassoCheckResult]: Loop: 861#L13-1 call #t~ret8 := fibo(~n - 2);< 843#fiboENTRY ~n := #in~n; 933#L8 assume !(~n < 1); 880#L10 assume !(1 == ~n); 860#L13 call #t~ret7 := fibo(~n - 1);< 843#fiboENTRY ~n := #in~n; 933#L8 assume !(~n < 1); 880#L10 assume 1 == ~n;#res := 1; 881#fiboFINAL assume true; 935#fiboEXIT >#35#return; 861#L13-1 [2020-10-20 08:01:13,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:13,700 INFO L82 PathProgramCache]: Analyzing trace with hash 1335554545, now seen corresponding path program 1 times [2020-10-20 08:01:13,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:01:13,700 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763936960] [2020-10-20 08:01:13,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:01:13,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:13,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-10-20 08:01:13,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:13,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 08:01:13,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:13,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-20 08:01:13,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:13,802 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-20 08:01:13,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763936960] [2020-10-20 08:01:13,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401992126] [2020-10-20 08:01:13,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 08:01:13,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:13,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-20 08:01:13,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:13,914 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-20 08:01:13,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 08:01:13,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-20 08:01:13,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413141809] [2020-10-20 08:01:13,915 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-20 08:01:13,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:13,915 INFO L82 PathProgramCache]: Analyzing trace with hash 350977484, now seen corresponding path program 1 times [2020-10-20 08:01:13,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:01:13,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038279121] [2020-10-20 08:01:13,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:01:13,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:01:13,920 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:01:13,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:01:13,923 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:01:13,925 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 08:01:14,020 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 08:01:14,021 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 08:01:14,021 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 08:01:14,021 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 08:01:14,021 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-20 08:01:14,021 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:14,021 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 08:01:14,021 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 08:01:14,021 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-2.c_Iteration4_Loop [2020-10-20 08:01:14,021 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 08:01:14,022 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 08:01:14,023 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:14,025 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:14,032 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:14,034 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:14,071 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 08:01:14,071 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:01:14,079 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:01:14,079 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:14,085 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:01:14,085 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:14,125 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:01:14,125 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:14,150 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-20 08:01:14,150 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:01:15,243 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-20 08:01:15,245 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 08:01:15,245 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 08:01:15,245 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 08:01:15,245 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 08:01:15,245 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-20 08:01:15,245 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:15,245 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 08:01:15,245 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 08:01:15,246 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-2.c_Iteration4_Loop [2020-10-20 08:01:15,246 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 08:01:15,246 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 08:01:15,247 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:15,255 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:15,262 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:15,264 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:15,306 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 08:01:15,307 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 [2020-10-20 08:01:15,313 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 08:01:15,315 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:15,315 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:15,315 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:15,315 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:15,315 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:15,316 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:15,316 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:15,318 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:15,341 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 08:01:15,342 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:15,342 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:15,343 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:15,343 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:15,343 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:15,344 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:15,344 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:15,352 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-20 08:01:15,358 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-20 08:01:15,358 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:15,361 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-20 08:01:15,361 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-20 08:01:15,362 INFO L510 LassoAnalysis]: Proved termination. [2020-10-20 08:01:15,362 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2020-10-20 08:01:15,381 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-20 08:01:15,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:15,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:15,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-20 08:01:15,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:15,462 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:15,470 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:15,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:15,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-20 08:01:15,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:15,592 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 08:01:15,593 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 6 loop predicates [2020-10-20 08:01:15,593 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 106 states and 139 transitions. cyclomatic complexity: 38 Second operand 8 states. [2020-10-20 08:01:15,851 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 106 states and 139 transitions. cyclomatic complexity: 38. Second operand 8 states. Result 195 states and 261 transitions. Complement of second has 33 states. [2020-10-20 08:01:15,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 9 states 2 stem states 6 non-accepting loop states 1 accepting loop states [2020-10-20 08:01:15,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-20 08:01:15,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 37 transitions. [2020-10-20 08:01:15,855 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 37 transitions. Stem has 28 letters. Loop has 10 letters. [2020-10-20 08:01:15,856 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:15,856 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-20 08:01:15,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:15,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:15,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-20 08:01:15,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:15,928 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:15,932 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:15,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:15,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-20 08:01:15,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:16,035 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 08:01:16,035 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 6 loop predicates [2020-10-20 08:01:16,036 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 106 states and 139 transitions. cyclomatic complexity: 38 Second operand 8 states. [2020-10-20 08:01:16,220 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 106 states and 139 transitions. cyclomatic complexity: 38. Second operand 8 states. Result 292 states and 393 transitions. Complement of second has 25 states. [2020-10-20 08:01:16,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2020-10-20 08:01:16,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-20 08:01:16,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 24 transitions. [2020-10-20 08:01:16,224 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 24 transitions. Stem has 28 letters. Loop has 10 letters. [2020-10-20 08:01:16,224 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:16,224 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-20 08:01:16,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:16,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:16,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-20 08:01:16,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:16,296 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:16,299 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:16,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:16,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-20 08:01:16,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:16,383 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 08:01:16,383 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 6 loop predicates [2020-10-20 08:01:16,384 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 106 states and 139 transitions. cyclomatic complexity: 38 Second operand 8 states. [2020-10-20 08:01:16,693 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 106 states and 139 transitions. cyclomatic complexity: 38. Second operand 8 states. Result 810 states and 1071 transitions. Complement of second has 130 states. [2020-10-20 08:01:16,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 9 states 2 stem states 6 non-accepting loop states 1 accepting loop states [2020-10-20 08:01:16,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-10-20 08:01:16,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 42 transitions. [2020-10-20 08:01:16,697 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 42 transitions. Stem has 28 letters. Loop has 10 letters. [2020-10-20 08:01:16,699 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:16,702 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 42 transitions. Stem has 38 letters. Loop has 10 letters. [2020-10-20 08:01:16,703 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:16,704 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 42 transitions. Stem has 28 letters. Loop has 20 letters. [2020-10-20 08:01:16,705 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:16,712 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 810 states and 1071 transitions. [2020-10-20 08:01:16,729 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 44 [2020-10-20 08:01:16,742 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 810 states to 419 states and 599 transitions. [2020-10-20 08:01:16,742 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 159 [2020-10-20 08:01:16,743 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 183 [2020-10-20 08:01:16,743 INFO L73 IsDeterministic]: Start isDeterministic. Operand 419 states and 599 transitions. [2020-10-20 08:01:16,744 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 08:01:16,744 INFO L691 BuchiCegarLoop]: Abstraction has 419 states and 599 transitions. [2020-10-20 08:01:16,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states and 599 transitions. [2020-10-20 08:01:16,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 332. [2020-10-20 08:01:16,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 332 states. [2020-10-20 08:01:16,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 449 transitions. [2020-10-20 08:01:16,783 INFO L714 BuchiCegarLoop]: Abstraction has 332 states and 449 transitions. [2020-10-20 08:01:16,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 08:01:16,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-20 08:01:16,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-20 08:01:16,784 INFO L87 Difference]: Start difference. First operand 332 states and 449 transitions. Second operand 11 states. [2020-10-20 08:01:16,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 08:01:16,975 INFO L93 Difference]: Finished difference Result 504 states and 744 transitions. [2020-10-20 08:01:16,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-20 08:01:16,976 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 504 states and 744 transitions. [2020-10-20 08:01:16,985 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-10-20 08:01:16,994 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 504 states to 502 states and 741 transitions. [2020-10-20 08:01:16,995 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 226 [2020-10-20 08:01:16,995 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 226 [2020-10-20 08:01:16,996 INFO L73 IsDeterministic]: Start isDeterministic. Operand 502 states and 741 transitions. [2020-10-20 08:01:16,996 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 08:01:16,996 INFO L691 BuchiCegarLoop]: Abstraction has 502 states and 741 transitions. [2020-10-20 08:01:16,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states and 741 transitions. [2020-10-20 08:01:17,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 456. [2020-10-20 08:01:17,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 456 states. [2020-10-20 08:01:17,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 677 transitions. [2020-10-20 08:01:17,045 INFO L714 BuchiCegarLoop]: Abstraction has 456 states and 677 transitions. [2020-10-20 08:01:17,045 INFO L594 BuchiCegarLoop]: Abstraction has 456 states and 677 transitions. [2020-10-20 08:01:17,045 INFO L427 BuchiCegarLoop]: ======== Iteration 5============ [2020-10-20 08:01:17,045 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 456 states and 677 transitions. [2020-10-20 08:01:17,051 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-10-20 08:01:17,051 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 08:01:17,051 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 08:01:17,053 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 08:01:17,053 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-10-20 08:01:17,054 INFO L794 eck$LassoCheckResult]: Stem: 3811#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(11);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 3797#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 7; 3798#L27 call main_#t~ret9 := fibo(main_~x~0);< 3819#fiboENTRY ~n := #in~n; 3864#L8 assume !(~n < 1); 3863#L10 assume !(1 == ~n); 3859#L13 call #t~ret7 := fibo(~n - 1);< 3861#fiboENTRY ~n := #in~n; 3862#L8 assume !(~n < 1); 3858#L10 assume !(1 == ~n); 3842#L13 call #t~ret7 := fibo(~n - 1);< 3855#fiboENTRY ~n := #in~n; 3856#L8 assume !(~n < 1); 3860#L10 assume !(1 == ~n); 3841#L13 call #t~ret7 := fibo(~n - 1);< 3855#fiboENTRY ~n := #in~n; 3857#L8 assume !(~n < 1); 3840#L10 assume 1 == ~n;#res := 1; 3843#fiboFINAL assume true; 3915#fiboEXIT >#35#return; 3909#L13-1 call #t~ret8 := fibo(~n - 2);< 3911#fiboENTRY ~n := #in~n; 4104#L8 assume !(~n < 1); 4031#L10 assume !(1 == ~n); 4032#L13 call #t~ret7 := fibo(~n - 1);< 4042#fiboENTRY ~n := #in~n; 4068#L8 assume !(~n < 1); 4049#L10 assume !(1 == ~n); 4050#L13 call #t~ret7 := fibo(~n - 1);< 4060#fiboENTRY [2020-10-20 08:01:17,054 INFO L796 eck$LassoCheckResult]: Loop: 4060#fiboENTRY ~n := #in~n; 4067#L8 assume !(~n < 1); 4066#L10 assume !(1 == ~n); 4059#L13 call #t~ret7 := fibo(~n - 1);< 4060#fiboENTRY [2020-10-20 08:01:17,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:17,054 INFO L82 PathProgramCache]: Analyzing trace with hash -777601154, now seen corresponding path program 1 times [2020-10-20 08:01:17,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:01:17,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692856328] [2020-10-20 08:01:17,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:01:17,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:17,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-20 08:01:17,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:17,188 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 30 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-20 08:01:17,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692856328] [2020-10-20 08:01:17,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743196383] [2020-10-20 08:01:17,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 08:01:17,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:17,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-20 08:01:17,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:17,261 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 30 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-20 08:01:17,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 08:01:17,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-20 08:01:17,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776657389] [2020-10-20 08:01:17,262 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-20 08:01:17,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:17,262 INFO L82 PathProgramCache]: Analyzing trace with hash 1512524, now seen corresponding path program 2 times [2020-10-20 08:01:17,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:01:17,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134841136] [2020-10-20 08:01:17,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:01:17,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:01:17,266 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:01:17,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:01:17,267 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:01:17,269 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 08:01:17,301 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 08:01:17,301 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 08:01:17,301 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 08:01:17,301 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 08:01:17,301 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-20 08:01:17,301 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:17,301 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 08:01:17,301 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 08:01:17,302 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-2.c_Iteration5_Loop [2020-10-20 08:01:17,302 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 08:01:17,302 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 08:01:17,303 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:17,306 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:17,308 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:17,311 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:17,317 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:17,361 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 08:01:17,361 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:01:17,378 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:01:17,379 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:17,383 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:01:17,384 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:17,412 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:01:17,413 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:01:17,416 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:01:17,416 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 [2020-10-20 08:01:17,439 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:01:17,439 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:01:17,442 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:01:17,443 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) [2020-10-20 08:01:17,480 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:01:17,480 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 35 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 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 [2020-10-20 08:01:17,513 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-20 08:01:17,513 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:01:17,578 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-20 08:01:17,579 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 08:01:17,579 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 08:01:17,579 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 08:01:17,579 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 08:01:17,580 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-20 08:01:17,580 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:17,580 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 08:01:17,580 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 08:01:17,580 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-2.c_Iteration5_Loop [2020-10-20 08:01:17,580 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 08:01:17,580 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 08:01:17,581 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:17,583 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:17,585 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:17,589 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:17,590 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:17,633 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 08:01:17,633 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:17,638 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 08:01:17,639 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:17,639 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:17,639 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:17,639 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:17,640 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:17,640 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:17,640 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:17,642 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:01:17,665 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 08:01:17,667 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:17,667 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:17,667 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:17,667 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:17,667 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. Waiting until toolchain timeout for monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:17,668 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:17,668 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:17,669 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:01:17,706 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 08:01:17,708 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:17,708 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:17,709 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:17,709 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:17,709 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:17,709 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:17,709 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 39 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:17,720 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:01:17,756 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 08:01:17,759 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:17,759 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:17,760 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:17,760 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:17,760 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:17,761 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:17,761 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 40 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:17,763 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:17,785 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 08:01:17,786 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:17,786 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:17,786 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:17,787 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:17,787 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:17,787 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:17,787 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:17,790 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-20 08:01:17,793 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-20 08:01:17,793 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:01:17,801 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-20 08:01:17,801 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-20 08:01:17,802 INFO L510 LassoAnalysis]: Proved termination. [2020-10-20 08:01:17,802 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_#in~n) = 1*fibo_#in~n Supporting invariants [] Waiting until toolchain timeout for monitored process 42 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:17,837 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-20 08:01:17,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:17,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:17,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-20 08:01:17,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:17,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:17,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-20 08:01:17,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:17,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 08:01:17,979 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2020-10-20 08:01:17,979 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 456 states and 677 transitions. cyclomatic complexity: 231 Second operand 5 states. [2020-10-20 08:01:18,063 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 456 states and 677 transitions. cyclomatic complexity: 231. Second operand 5 states. Result 466 states and 687 transitions. Complement of second has 13 states. [2020-10-20 08:01:18,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2020-10-20 08:01:18,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-10-20 08:01:18,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 13 transitions. [2020-10-20 08:01:18,065 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 13 transitions. Stem has 29 letters. Loop has 4 letters. [2020-10-20 08:01:18,065 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:18,065 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-20 08:01:18,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:18,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:18,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-20 08:01:18,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:18,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:18,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-20 08:01:18,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:18,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 08:01:18,176 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 3 loop predicates [2020-10-20 08:01:18,176 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 456 states and 677 transitions. cyclomatic complexity: 231 Second operand 5 states. [2020-10-20 08:01:18,241 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 456 states and 677 transitions. cyclomatic complexity: 231. Second operand 5 states. Result 466 states and 687 transitions. Complement of second has 13 states. [2020-10-20 08:01:18,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2020-10-20 08:01:18,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-10-20 08:01:18,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 13 transitions. [2020-10-20 08:01:18,243 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 13 transitions. Stem has 29 letters. Loop has 4 letters. [2020-10-20 08:01:18,243 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:18,243 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-20 08:01:18,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:18,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:18,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-20 08:01:18,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:18,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:18,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-20 08:01:18,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:18,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 08:01:18,376 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2020-10-20 08:01:18,377 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 456 states and 677 transitions. cyclomatic complexity: 231 Second operand 5 states. [2020-10-20 08:01:18,477 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 456 states and 677 transitions. cyclomatic complexity: 231. Second operand 5 states. Result 617 states and 861 transitions. Complement of second has 14 states. [2020-10-20 08:01:18,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2020-10-20 08:01:18,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-10-20 08:01:18,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 21 transitions. [2020-10-20 08:01:18,479 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 29 letters. Loop has 4 letters. [2020-10-20 08:01:18,480 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:18,480 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 33 letters. Loop has 4 letters. [2020-10-20 08:01:18,480 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:18,481 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 29 letters. Loop has 8 letters. [2020-10-20 08:01:18,481 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:18,481 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 617 states and 861 transitions. [2020-10-20 08:01:18,490 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-10-20 08:01:18,499 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 617 states to 520 states and 752 transitions. [2020-10-20 08:01:18,499 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 189 [2020-10-20 08:01:18,500 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 198 [2020-10-20 08:01:18,500 INFO L73 IsDeterministic]: Start isDeterministic. Operand 520 states and 752 transitions. [2020-10-20 08:01:18,501 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 08:01:18,501 INFO L691 BuchiCegarLoop]: Abstraction has 520 states and 752 transitions. [2020-10-20 08:01:18,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states and 752 transitions. [2020-10-20 08:01:18,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 490. [2020-10-20 08:01:18,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 490 states. [2020-10-20 08:01:18,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 716 transitions. [2020-10-20 08:01:18,521 INFO L714 BuchiCegarLoop]: Abstraction has 490 states and 716 transitions. [2020-10-20 08:01:18,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 08:01:18,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-20 08:01:18,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-10-20 08:01:18,522 INFO L87 Difference]: Start difference. First operand 490 states and 716 transitions. Second operand 12 states. [2020-10-20 08:01:18,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 08:01:18,735 INFO L93 Difference]: Finished difference Result 545 states and 810 transitions. [2020-10-20 08:01:18,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-20 08:01:18,736 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 545 states and 810 transitions. [2020-10-20 08:01:18,744 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-10-20 08:01:18,753 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 545 states to 542 states and 802 transitions. [2020-10-20 08:01:18,753 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 213 [2020-10-20 08:01:18,754 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 213 [2020-10-20 08:01:18,754 INFO L73 IsDeterministic]: Start isDeterministic. Operand 542 states and 802 transitions. [2020-10-20 08:01:18,754 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 08:01:18,754 INFO L691 BuchiCegarLoop]: Abstraction has 542 states and 802 transitions. [2020-10-20 08:01:18,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states and 802 transitions. [2020-10-20 08:01:18,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 511. [2020-10-20 08:01:18,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 511 states. [2020-10-20 08:01:18,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 756 transitions. [2020-10-20 08:01:18,775 INFO L714 BuchiCegarLoop]: Abstraction has 511 states and 756 transitions. [2020-10-20 08:01:18,775 INFO L594 BuchiCegarLoop]: Abstraction has 511 states and 756 transitions. [2020-10-20 08:01:18,775 INFO L427 BuchiCegarLoop]: ======== Iteration 6============ [2020-10-20 08:01:18,775 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 511 states and 756 transitions. [2020-10-20 08:01:18,779 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-10-20 08:01:18,779 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 08:01:18,780 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 08:01:18,781 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [8, 8, 7, 6, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 08:01:18,781 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-10-20 08:01:18,781 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 [2020-10-20 08:01:18,781 INFO L796 eck$LassoCheckResult]: Loop: 7362#L13 call #t~ret7 := fibo(~n - 1);< 7360#fiboENTRY ~n := #in~n; 7365#L8 assume !(~n < 1); 7374#L10 assume !(1 == ~n); 7362#L13 [2020-10-20 08:01:18,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:18,782 INFO L82 PathProgramCache]: Analyzing trace with hash 42869646, now seen corresponding path program 2 times [2020-10-20 08:01:18,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:01:18,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970091881] [2020-10-20 08:01:18,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:01:18,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:18,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-20 08:01:18,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:18,888 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 53 proven. 36 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-20 08:01:18,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970091881] [2020-10-20 08:01:18,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061385639] [2020-10-20 08:01:18,889 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 08:01:18,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-20 08:01:18,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 08:01:18,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-20 08:01:18,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:18,981 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 53 proven. 36 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-20 08:01:18,981 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 08:01:18,981 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-20 08:01:18,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234428483] [2020-10-20 08:01:18,982 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-20 08:01:18,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:18,982 INFO L82 PathProgramCache]: Analyzing trace with hash 1955414, now seen corresponding path program 3 times [2020-10-20 08:01:18,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:01:18,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783366462] [2020-10-20 08:01:18,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:01:18,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:01:18,986 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:01:18,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:01:18,988 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:01:18,989 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 08:01:19,035 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 08:01:19,035 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 08:01:19,035 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 08:01:19,035 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 08:01:19,036 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-20 08:01:19,036 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:19,036 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 08:01:19,036 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 08:01:19,036 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-2.c_Iteration6_Loop [2020-10-20 08:01:19,036 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 08:01:19,037 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 08:01:19,038 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:19,041 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:19,044 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:19,053 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:19,113 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 08:01:19,114 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:01:19,117 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:01:19,117 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 44 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:19,122 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:01:19,122 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret8=0} Honda state: {fibo_#t~ret8=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:01:19,172 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:01:19,172 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 45 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:19,176 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:01:19,176 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:01:19,225 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:01:19,225 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 46 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:01:19,267 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-20 08:01:19,267 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 47 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:26,372 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-20 08:01:26,375 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 08:01:26,375 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 08:01:26,375 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 08:01:26,375 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 08:01:26,375 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-20 08:01:26,375 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:26,375 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 08:01:26,375 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 08:01:26,376 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-2.c_Iteration6_Loop [2020-10-20 08:01:26,376 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 08:01:26,376 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 08:01:26,376 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:26,379 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:26,380 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:26,389 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:26,448 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 08:01:26,448 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:26,452 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 08:01:26,453 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:26,453 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:26,454 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:26,454 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:26,454 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:26,454 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:26,454 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:26,456 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:26,480 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 08:01:26,481 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:26,481 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:26,481 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:26,481 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:26,481 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:26,482 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:26,482 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:26,483 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:26,516 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 08:01:26,518 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:26,518 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:26,518 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:26,518 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:26,518 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:26,519 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:26,519 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:26,521 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-20 08:01:26,523 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2020-10-20 08:01:26,523 INFO L444 ModelExtractionUtils]: 2 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:01:26,526 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-20 08:01:26,526 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-20 08:01:26,526 INFO L510 LassoAnalysis]: Proved termination. [2020-10-20 08:01:26,526 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] Waiting until toolchain timeout for monitored process 51 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:26,547 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-20 08:01:26,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:26,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:26,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-20 08:01:26,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:26,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:26,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-20 08:01:26,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:26,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 08:01:26,680 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 4 loop predicates [2020-10-20 08:01:26,681 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 511 states and 756 transitions. cyclomatic complexity: 255 Second operand 6 states. [2020-10-20 08:01:26,742 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 511 states and 756 transitions. cyclomatic complexity: 255. Second operand 6 states. Result 523 states and 769 transitions. Complement of second has 18 states. [2020-10-20 08:01:26,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2020-10-20 08:01:26,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-20 08:01:26,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 13 transitions. [2020-10-20 08:01:26,744 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 13 transitions. Stem has 36 letters. Loop has 4 letters. [2020-10-20 08:01:26,744 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:26,745 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-20 08:01:26,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:26,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:26,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-20 08:01:26,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:26,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:26,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-20 08:01:26,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:26,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 08:01:26,889 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 4 loop predicates [2020-10-20 08:01:26,889 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 511 states and 756 transitions. cyclomatic complexity: 255 Second operand 6 states. [2020-10-20 08:01:26,998 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 511 states and 756 transitions. cyclomatic complexity: 255. Second operand 6 states. Result 753 states and 1085 transitions. Complement of second has 22 states. [2020-10-20 08:01:26,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2020-10-20 08:01:26,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-20 08:01:26,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 16 transitions. [2020-10-20 08:01:27,000 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 36 letters. Loop has 4 letters. [2020-10-20 08:01:27,000 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:27,000 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 40 letters. Loop has 4 letters. [2020-10-20 08:01:27,000 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:27,000 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 36 letters. Loop has 8 letters. [2020-10-20 08:01:27,001 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:27,001 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 753 states and 1085 transitions. [2020-10-20 08:01:27,016 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-10-20 08:01:27,029 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 753 states to 689 states and 1016 transitions. [2020-10-20 08:01:27,029 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 233 [2020-10-20 08:01:27,030 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 261 [2020-10-20 08:01:27,030 INFO L73 IsDeterministic]: Start isDeterministic. Operand 689 states and 1016 transitions. [2020-10-20 08:01:27,030 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 08:01:27,031 INFO L691 BuchiCegarLoop]: Abstraction has 689 states and 1016 transitions. [2020-10-20 08:01:27,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 689 states and 1016 transitions. [2020-10-20 08:01:27,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 689 to 672. [2020-10-20 08:01:27,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 672 states. [2020-10-20 08:01:27,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 672 states to 672 states and 991 transitions. [2020-10-20 08:01:27,057 INFO L714 BuchiCegarLoop]: Abstraction has 672 states and 991 transitions. [2020-10-20 08:01:27,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 08:01:27,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-20 08:01:27,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-10-20 08:01:27,058 INFO L87 Difference]: Start difference. First operand 672 states and 991 transitions. Second operand 14 states. [2020-10-20 08:01:27,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 08:01:27,327 INFO L93 Difference]: Finished difference Result 735 states and 1085 transitions. [2020-10-20 08:01:27,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-20 08:01:27,327 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 735 states and 1085 transitions. [2020-10-20 08:01:27,341 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-10-20 08:01:27,355 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 735 states to 725 states and 1070 transitions. [2020-10-20 08:01:27,356 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 268 [2020-10-20 08:01:27,356 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 268 [2020-10-20 08:01:27,356 INFO L73 IsDeterministic]: Start isDeterministic. Operand 725 states and 1070 transitions. [2020-10-20 08:01:27,357 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 08:01:27,357 INFO L691 BuchiCegarLoop]: Abstraction has 725 states and 1070 transitions. [2020-10-20 08:01:27,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 725 states and 1070 transitions. [2020-10-20 08:01:27,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 725 to 712. [2020-10-20 08:01:27,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 712 states. [2020-10-20 08:01:27,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 1045 transitions. [2020-10-20 08:01:27,385 INFO L714 BuchiCegarLoop]: Abstraction has 712 states and 1045 transitions. [2020-10-20 08:01:27,385 INFO L594 BuchiCegarLoop]: Abstraction has 712 states and 1045 transitions. [2020-10-20 08:01:27,385 INFO L427 BuchiCegarLoop]: ======== Iteration 7============ [2020-10-20 08:01:27,385 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 712 states and 1045 transitions. [2020-10-20 08:01:27,391 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-10-20 08:01:27,391 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 08:01:27,391 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 08:01:27,392 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [10, 9, 8, 7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 08:01:27,392 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-10-20 08:01:27,392 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 [2020-10-20 08:01:27,393 INFO L796 eck$LassoCheckResult]: Loop: 11305#L13 call #t~ret7 := fibo(~n - 1);< 11314#fiboENTRY ~n := #in~n; 11397#L8 assume !(~n < 1); 11396#L10 assume !(1 == ~n); 11305#L13 [2020-10-20 08:01:27,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:27,393 INFO L82 PathProgramCache]: Analyzing trace with hash -1891219752, now seen corresponding path program 2 times [2020-10-20 08:01:27,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:01:27,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135834777] [2020-10-20 08:01:27,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:01:27,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:27,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-20 08:01:27,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:27,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 08:01:27,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:27,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-20 08:01:27,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:27,510 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 73 proven. 66 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-20 08:01:27,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135834777] [2020-10-20 08:01:27,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201743289] [2020-10-20 08:01:27,511 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 08:01:27,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-20 08:01:27,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 08:01:27,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-20 08:01:27,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:27,594 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 73 proven. 66 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-20 08:01:27,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 08:01:27,595 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-20 08:01:27,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874908973] [2020-10-20 08:01:27,595 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-20 08:01:27,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:27,596 INFO L82 PathProgramCache]: Analyzing trace with hash 1955414, now seen corresponding path program 4 times [2020-10-20 08:01:27,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:01:27,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694988542] [2020-10-20 08:01:27,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:01:27,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:01:27,598 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:01:27,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:01:27,599 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:01:27,600 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 08:01:27,667 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 08:01:27,667 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 08:01:27,667 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 08:01:27,667 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 08:01:27,667 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-20 08:01:27,668 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:27,668 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 08:01:27,668 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 08:01:27,668 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-2.c_Iteration7_Loop [2020-10-20 08:01:27,668 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 08:01:27,668 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 08:01:27,669 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:27,680 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:27,682 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:27,684 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:27,736 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 08:01:27,737 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:01:27,740 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:01:27,740 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 53 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:01:27,791 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-20 08:01:27,791 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 54 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:29,294 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-20 08:01:29,295 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 08:01:29,295 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 08:01:29,295 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 08:01:29,296 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 08:01:29,296 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-20 08:01:29,296 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:29,296 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 08:01:29,296 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 08:01:29,296 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-2.c_Iteration7_Loop [2020-10-20 08:01:29,296 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 08:01:29,296 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 08:01:29,297 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:29,299 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:29,301 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:29,304 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:29,354 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 08:01:29,354 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) [2020-10-20 08:01:29,364 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 08:01:29,366 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:29,366 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:29,366 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:29,367 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:29,367 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:29,367 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:29,368 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 [2020-10-20 08:01:29,370 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:29,402 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 08:01:29,403 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:29,404 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:29,404 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:29,404 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:29,404 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:29,404 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:29,404 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:29,407 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) [2020-10-20 08:01:29,430 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 08:01:29,431 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:29,431 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:29,431 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:29,431 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:29,431 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:29,432 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:29,432 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 57 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:29,433 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 08:01:29,455 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 58 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:29,457 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:29,457 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:29,457 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:29,457 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:29,457 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:29,458 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:29,458 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:29,461 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-20 08:01:29,462 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2020-10-20 08:01:29,463 INFO L444 ModelExtractionUtils]: 2 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:29,466 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-20 08:01:29,466 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-20 08:01:29,466 INFO L510 LassoAnalysis]: Proved termination. [2020-10-20 08:01:29,466 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2020-10-20 08:01:29,486 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-20 08:01:29,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:29,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:29,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-20 08:01:29,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:29,591 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:29,594 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:29,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:29,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-20 08:01:29,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:29,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 08:01:29,639 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 4 loop predicates [2020-10-20 08:01:29,639 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 712 states and 1045 transitions. cyclomatic complexity: 346 Second operand 6 states. [2020-10-20 08:01:29,719 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 712 states and 1045 transitions. cyclomatic complexity: 346. Second operand 6 states. Result 731 states and 1065 transitions. Complement of second has 18 states. [2020-10-20 08:01:29,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2020-10-20 08:01:29,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-20 08:01:29,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 13 transitions. [2020-10-20 08:01:29,720 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 13 transitions. Stem has 48 letters. Loop has 4 letters. [2020-10-20 08:01:29,720 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:29,720 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-20 08:01:29,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:29,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:29,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-20 08:01:29,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:29,808 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:29,810 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:29,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:29,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-20 08:01:29,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:29,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 08:01:29,859 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 4 loop predicates [2020-10-20 08:01:29,859 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 712 states and 1045 transitions. cyclomatic complexity: 346 Second operand 6 states. [2020-10-20 08:01:30,007 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 712 states and 1045 transitions. cyclomatic complexity: 346. Second operand 6 states. Result 916 states and 1284 transitions. Complement of second has 22 states. [2020-10-20 08:01:30,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2020-10-20 08:01:30,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-20 08:01:30,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 16 transitions. [2020-10-20 08:01:30,009 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 48 letters. Loop has 4 letters. [2020-10-20 08:01:30,010 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:30,010 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-20 08:01:30,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:30,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:30,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-20 08:01:30,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:30,103 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:30,106 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:30,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:30,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-20 08:01:30,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:30,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 08:01:30,144 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 4 loop predicates [2020-10-20 08:01:30,144 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 712 states and 1045 transitions. cyclomatic complexity: 346 Second operand 6 states. [2020-10-20 08:01:30,217 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 712 states and 1045 transitions. cyclomatic complexity: 346. Second operand 6 states. Result 959 states and 1365 transitions. Complement of second has 27 states. [2020-10-20 08:01:30,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2020-10-20 08:01:30,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-20 08:01:30,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 22 transitions. [2020-10-20 08:01:30,219 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 48 letters. Loop has 4 letters. [2020-10-20 08:01:30,219 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:30,219 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 52 letters. Loop has 4 letters. [2020-10-20 08:01:30,220 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:30,220 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 48 letters. Loop has 8 letters. [2020-10-20 08:01:30,220 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:30,220 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 959 states and 1365 transitions. [2020-10-20 08:01:30,232 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-10-20 08:01:30,242 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 959 states to 712 states and 1045 transitions. [2020-10-20 08:01:30,242 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 216 [2020-10-20 08:01:30,243 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 252 [2020-10-20 08:01:30,243 INFO L73 IsDeterministic]: Start isDeterministic. Operand 712 states and 1045 transitions. [2020-10-20 08:01:30,243 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 08:01:30,244 INFO L691 BuchiCegarLoop]: Abstraction has 712 states and 1045 transitions. [2020-10-20 08:01:30,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 712 states and 1045 transitions. [2020-10-20 08:01:30,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 712 to 712. [2020-10-20 08:01:30,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 712 states. [2020-10-20 08:01:30,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 1045 transitions. [2020-10-20 08:01:30,268 INFO L714 BuchiCegarLoop]: Abstraction has 712 states and 1045 transitions. [2020-10-20 08:01:30,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 08:01:30,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-20 08:01:30,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-10-20 08:01:30,269 INFO L87 Difference]: Start difference. First operand 712 states and 1045 transitions. Second operand 15 states. [2020-10-20 08:01:30,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 08:01:30,628 INFO L93 Difference]: Finished difference Result 777 states and 1133 transitions. [2020-10-20 08:01:30,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-20 08:01:30,628 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 777 states and 1133 transitions. [2020-10-20 08:01:30,638 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-10-20 08:01:30,652 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 777 states to 777 states and 1133 transitions. [2020-10-20 08:01:30,653 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 291 [2020-10-20 08:01:30,654 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 291 [2020-10-20 08:01:30,654 INFO L73 IsDeterministic]: Start isDeterministic. Operand 777 states and 1133 transitions. [2020-10-20 08:01:30,655 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 08:01:30,655 INFO L691 BuchiCegarLoop]: Abstraction has 777 states and 1133 transitions. [2020-10-20 08:01:30,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 777 states and 1133 transitions. [2020-10-20 08:01:30,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 777 to 734. [2020-10-20 08:01:30,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 734 states. [2020-10-20 08:01:30,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 1083 transitions. [2020-10-20 08:01:30,685 INFO L714 BuchiCegarLoop]: Abstraction has 734 states and 1083 transitions. [2020-10-20 08:01:30,685 INFO L594 BuchiCegarLoop]: Abstraction has 734 states and 1083 transitions. [2020-10-20 08:01:30,685 INFO L427 BuchiCegarLoop]: ======== Iteration 8============ [2020-10-20 08:01:30,685 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 734 states and 1083 transitions. [2020-10-20 08:01:30,691 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-10-20 08:01:30,691 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 08:01:30,691 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 08:01:30,696 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [13, 12, 10, 9, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2020-10-20 08:01:30,696 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-10-20 08:01:30,697 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 [2020-10-20 08:01:30,698 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 [2020-10-20 08:01:30,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:30,698 INFO L82 PathProgramCache]: Analyzing trace with hash 167551224, now seen corresponding path program 3 times [2020-10-20 08:01:30,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:01:30,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755365795] [2020-10-20 08:01:30,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:01:30,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:30,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-20 08:01:30,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:30,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-10-20 08:01:30,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:30,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 08:01:30,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:30,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-20 08:01:30,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:30,867 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 114 proven. 121 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-10-20 08:01:30,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755365795] [2020-10-20 08:01:30,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447129394] [2020-10-20 08:01:30,868 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 08:01:30,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-20 08:01:30,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 08:01:30,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-20 08:01:30,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:31,031 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 141 proven. 19 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2020-10-20 08:01:31,031 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 08:01:31,031 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 23 [2020-10-20 08:01:31,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672844231] [2020-10-20 08:01:31,032 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-20 08:01:31,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:31,033 INFO L82 PathProgramCache]: Analyzing trace with hash 1955414, now seen corresponding path program 5 times [2020-10-20 08:01:31,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:01:31,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895475514] [2020-10-20 08:01:31,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:01:31,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:01:31,035 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:01:31,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:01:31,036 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:01:31,037 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 08:01:31,071 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 08:01:31,071 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 08:01:31,071 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 08:01:31,072 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 08:01:31,072 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-20 08:01:31,072 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:31,072 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 08:01:31,072 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 08:01:31,072 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-2.c_Iteration8_Loop [2020-10-20 08:01:31,072 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 08:01:31,072 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 08:01:31,073 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:31,074 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:31,076 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:31,084 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:31,149 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 08:01:31,149 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:31,156 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:01:31,156 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:01:31,159 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:01:31,159 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret7=0} Honda state: {fibo_#t~ret7=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:31,180 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:01:31,180 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:01:31,182 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:01:31,182 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) Waiting until toolchain timeout for monitored process 63 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:31,205 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:01:31,205 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:31,230 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-20 08:01:31,230 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:01:32,525 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-20 08:01:32,527 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 08:01:32,527 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 08:01:32,527 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 08:01:32,527 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 08:01:32,527 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-20 08:01:32,527 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:32,527 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 08:01:32,527 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 08:01:32,527 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-2.c_Iteration8_Loop [2020-10-20 08:01:32,527 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 08:01:32,527 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 08:01:32,528 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:32,531 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:32,533 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:32,539 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:32,594 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 08:01:32,594 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) [2020-10-20 08:01:32,599 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 08:01:32,601 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:32,601 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:32,601 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:32,601 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:32,601 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:32,602 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:32,602 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 65 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:32,603 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:32,628 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 08:01:32,629 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:32,629 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:32,629 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:32,629 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:32,629 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:32,630 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:32,630 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:32,631 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:32,652 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 08:01:32,653 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:32,653 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:32,654 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:32,654 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:32,654 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:32,655 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:32,655 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:32,657 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-20 08:01:32,659 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2020-10-20 08:01:32,659 INFO L444 ModelExtractionUtils]: 2 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:32,661 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-20 08:01:32,661 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-20 08:01:32,661 INFO L510 LassoAnalysis]: Proved termination. [2020-10-20 08:01:32,662 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2020-10-20 08:01:32,681 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-20 08:01:32,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:32,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:32,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-20 08:01:32,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:32,788 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:32,790 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:32,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:32,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-20 08:01:32,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:32,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 08:01:32,828 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 4 loop predicates [2020-10-20 08:01:32,828 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 734 states and 1083 transitions. cyclomatic complexity: 362 Second operand 6 states. [2020-10-20 08:01:32,885 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. [2020-10-20 08:01:32,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2020-10-20 08:01:32,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-20 08:01:32,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 13 transitions. [2020-10-20 08:01:32,886 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 13 transitions. Stem has 62 letters. Loop has 4 letters. [2020-10-20 08:01:32,886 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:32,886 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-20 08:01:33,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:33,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:33,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-20 08:01:33,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:33,091 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:33,095 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:33,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:33,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-20 08:01:33,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:33,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 08:01:33,134 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 4 loop predicates [2020-10-20 08:01:33,134 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 734 states and 1083 transitions. cyclomatic complexity: 362 Second operand 6 states. [2020-10-20 08:01:33,227 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. [2020-10-20 08:01:33,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2020-10-20 08:01:33,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-20 08:01:33,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 16 transitions. [2020-10-20 08:01:33,229 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 62 letters. Loop has 4 letters. [2020-10-20 08:01:33,229 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:33,229 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-20 08:01:33,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:33,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:33,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 28 conjunts are in the unsatisfiable core [2020-10-20 08:01:33,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:33,327 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:33,328 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:33,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:33,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-20 08:01:33,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:33,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 08:01:33,380 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 4 loop predicates [2020-10-20 08:01:33,380 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 734 states and 1083 transitions. cyclomatic complexity: 362 Second operand 6 states. [2020-10-20 08:01:33,467 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. [2020-10-20 08:01:33,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2020-10-20 08:01:33,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-20 08:01:33,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 22 transitions. [2020-10-20 08:01:33,469 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 62 letters. Loop has 4 letters. [2020-10-20 08:01:33,469 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:33,470 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 66 letters. Loop has 4 letters. [2020-10-20 08:01:33,470 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:33,470 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 62 letters. Loop has 8 letters. [2020-10-20 08:01:33,471 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:33,471 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 981 states and 1403 transitions. [2020-10-20 08:01:33,480 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-10-20 08:01:33,489 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 981 states to 734 states and 1083 transitions. [2020-10-20 08:01:33,489 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 229 [2020-10-20 08:01:33,490 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 265 [2020-10-20 08:01:33,490 INFO L73 IsDeterministic]: Start isDeterministic. Operand 734 states and 1083 transitions. [2020-10-20 08:01:33,490 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 08:01:33,490 INFO L691 BuchiCegarLoop]: Abstraction has 734 states and 1083 transitions. [2020-10-20 08:01:33,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 734 states and 1083 transitions. [2020-10-20 08:01:33,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 734 to 734. [2020-10-20 08:01:33,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 734 states. [2020-10-20 08:01:33,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 1083 transitions. [2020-10-20 08:01:33,511 INFO L714 BuchiCegarLoop]: Abstraction has 734 states and 1083 transitions. [2020-10-20 08:01:33,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 08:01:33,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-20 08:01:33,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2020-10-20 08:01:33,512 INFO L87 Difference]: Start difference. First operand 734 states and 1083 transitions. Second operand 23 states. [2020-10-20 08:01:34,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 08:01:34,047 INFO L93 Difference]: Finished difference Result 483 states and 671 transitions. [2020-10-20 08:01:34,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-20 08:01:34,049 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 483 states and 671 transitions. [2020-10-20 08:01:34,055 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2020-10-20 08:01:34,060 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 483 states to 402 states and 569 transitions. [2020-10-20 08:01:34,060 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 174 [2020-10-20 08:01:34,060 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 194 [2020-10-20 08:01:34,060 INFO L73 IsDeterministic]: Start isDeterministic. Operand 402 states and 569 transitions. [2020-10-20 08:01:34,064 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 08:01:34,064 INFO L691 BuchiCegarLoop]: Abstraction has 402 states and 569 transitions. [2020-10-20 08:01:34,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states and 569 transitions. [2020-10-20 08:01:34,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 319. [2020-10-20 08:01:34,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 319 states. [2020-10-20 08:01:34,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 440 transitions. [2020-10-20 08:01:34,077 INFO L714 BuchiCegarLoop]: Abstraction has 319 states and 440 transitions. [2020-10-20 08:01:34,078 INFO L594 BuchiCegarLoop]: Abstraction has 319 states and 440 transitions. [2020-10-20 08:01:34,078 INFO L427 BuchiCegarLoop]: ======== Iteration 9============ [2020-10-20 08:01:34,078 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 319 states and 440 transitions. [2020-10-20 08:01:34,080 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2020-10-20 08:01:34,081 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 08:01:34,081 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 08:01:34,082 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [12, 11, 9, 8, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1] [2020-10-20 08:01:34,082 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-10-20 08:01:34,083 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 [2020-10-20 08:01:34,083 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 [2020-10-20 08:01:34,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:34,084 INFO L82 PathProgramCache]: Analyzing trace with hash -686810473, now seen corresponding path program 4 times [2020-10-20 08:01:34,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:01:34,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088281812] [2020-10-20 08:01:34,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:01:34,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:34,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-10-20 08:01:34,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:34,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 08:01:34,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:34,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-10-20 08:01:34,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:34,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-20 08:01:34,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:34,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-10-20 08:01:34,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:34,253 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 126 proven. 64 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-20 08:01:34,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088281812] [2020-10-20 08:01:34,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228289848] [2020-10-20 08:01:34,254 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 08:01:34,295 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-20 08:01:34,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-20 08:01:34,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-20 08:01:34,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:34,355 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 126 proven. 64 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-10-20 08:01:34,355 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 08:01:34,355 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 18 [2020-10-20 08:01:34,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740836490] [2020-10-20 08:01:34,356 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-20 08:01:34,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:34,356 INFO L82 PathProgramCache]: Analyzing trace with hash 1955414, now seen corresponding path program 6 times [2020-10-20 08:01:34,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 08:01:34,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439783728] [2020-10-20 08:01:34,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 08:01:34,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:01:34,359 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:01:34,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 08:01:34,360 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 08:01:34,361 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 08:01:34,409 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 08:01:34,409 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 08:01:34,409 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 08:01:34,410 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 08:01:34,410 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-20 08:01:34,410 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:34,410 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 08:01:34,410 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 08:01:34,410 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-2.c_Iteration9_Loop [2020-10-20 08:01:34,411 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 08:01:34,411 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 08:01:34,412 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:34,413 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:34,416 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:34,418 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:34,483 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 08:01:34,483 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) Waiting until toolchain timeout for monitored process 70 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:34,489 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:01:34,489 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:01:34,491 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:01:34,491 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) Waiting until toolchain timeout for monitored process 71 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:34,512 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:01:34,512 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:01:34,515 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:01:34,515 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) Waiting until toolchain timeout for monitored process 72 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:34,537 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:01:34,537 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:01:34,539 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 08:01:34,539 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) Waiting until toolchain timeout for monitored process 73 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:34,562 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 08:01:34,562 INFO L160 nArgumentSynthesizer]: Using integer mode. 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) Waiting until toolchain timeout for monitored process 74 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:34,589 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-20 08:01:34,589 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 08:01:41,463 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-20 08:01:41,465 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 08:01:41,465 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 08:01:41,466 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 08:01:41,466 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 08:01:41,466 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-20 08:01:41,466 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:41,466 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 08:01:41,466 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 08:01:41,466 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_7-2.c_Iteration9_Loop [2020-10-20 08:01:41,466 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 08:01:41,466 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 08:01:41,467 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:41,470 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:41,472 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:41,482 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 08:01:41,539 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 08:01:41,539 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:41,542 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 08:01:41,543 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:41,543 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:41,543 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:41,543 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:41,544 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:41,545 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:41,545 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:41,547 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:41,569 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 08:01:41,570 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:41,570 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:41,570 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:41,570 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:41,570 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:41,571 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:41,571 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:41,572 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:41,594 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 08:01:41,595 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 08:01:41,596 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 08:01:41,596 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 08:01:41,596 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 08:01:41,596 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 08:01:41,597 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 08:01:41,597 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 08:01:41,599 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-20 08:01:41,602 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2020-10-20 08:01:41,602 INFO L444 ModelExtractionUtils]: 2 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 08:01:41,604 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-20 08:01:41,604 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-20 08:01:41,604 INFO L510 LassoAnalysis]: Proved termination. [2020-10-20 08:01:41,604 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] [2020-10-20 08:01:41,624 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-20 08:01:41,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:41,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:41,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-20 08:01:41,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:41,724 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:41,727 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:41,728 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:41,731 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:41,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:41,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-20 08:01:41,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:41,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 08:01:41,805 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 4 loop predicates [2020-10-20 08:01:41,805 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 319 states and 440 transitions. cyclomatic complexity: 125 Second operand 6 states. [2020-10-20 08:01:41,863 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. [2020-10-20 08:01:41,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2020-10-20 08:01:41,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-20 08:01:41,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 13 transitions. [2020-10-20 08:01:41,864 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 13 transitions. Stem has 61 letters. Loop has 4 letters. [2020-10-20 08:01:41,864 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:41,864 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-20 08:01:41,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:41,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:41,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-20 08:01:41,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:41,962 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:41,966 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:41,969 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:41,973 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:41,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:41,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-20 08:01:41,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:42,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 08:01:42,015 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 4 loop predicates [2020-10-20 08:01:42,015 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 319 states and 440 transitions. cyclomatic complexity: 125 Second operand 6 states. [2020-10-20 08:01:42,105 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. [2020-10-20 08:01:42,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2020-10-20 08:01:42,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-20 08:01:42,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 16 transitions. [2020-10-20 08:01:42,106 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 61 letters. Loop has 4 letters. [2020-10-20 08:01:42,107 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:42,107 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-20 08:01:42,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 08:01:42,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:42,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 26 conjunts are in the unsatisfiable core [2020-10-20 08:01:42,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:42,221 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:42,223 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:42,225 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:42,227 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 08:01:42,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 08:01:42,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-20 08:01:42,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 08:01:42,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 08:01:42,285 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 4 loop predicates [2020-10-20 08:01:42,286 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 319 states and 440 transitions. cyclomatic complexity: 125 Second operand 6 states. [2020-10-20 08:01:42,363 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. [2020-10-20 08:01:42,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2020-10-20 08:01:42,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-20 08:01:42,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 22 transitions. [2020-10-20 08:01:42,367 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 61 letters. Loop has 4 letters. [2020-10-20 08:01:42,368 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:42,368 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 65 letters. Loop has 4 letters. [2020-10-20 08:01:42,368 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:42,369 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 22 transitions. Stem has 61 letters. Loop has 8 letters. [2020-10-20 08:01:42,369 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 08:01:42,369 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 421 states and 565 transitions. [2020-10-20 08:01:42,373 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2020-10-20 08:01:42,378 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 421 states to 323 states and 445 transitions. [2020-10-20 08:01:42,378 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 124 [2020-10-20 08:01:42,378 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 136 [2020-10-20 08:01:42,379 INFO L73 IsDeterministic]: Start isDeterministic. Operand 323 states and 445 transitions. [2020-10-20 08:01:42,380 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 08:01:42,380 INFO L691 BuchiCegarLoop]: Abstraction has 323 states and 445 transitions. [2020-10-20 08:01:42,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states and 445 transitions. [2020-10-20 08:01:42,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 319. [2020-10-20 08:01:42,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 319 states. [2020-10-20 08:01:42,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 440 transitions. [2020-10-20 08:01:42,394 INFO L714 BuchiCegarLoop]: Abstraction has 319 states and 440 transitions. [2020-10-20 08:01:42,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 08:01:42,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-20 08:01:42,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2020-10-20 08:01:42,396 INFO L87 Difference]: Start difference. First operand 319 states and 440 transitions. Second operand 18 states. [2020-10-20 08:01:42,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 08:01:42,716 INFO L93 Difference]: Finished difference Result 288 states and 361 transitions. [2020-10-20 08:01:42,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-20 08:01:42,717 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 288 states and 361 transitions. [2020-10-20 08:01:42,720 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-10-20 08:01:42,720 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 288 states to 0 states and 0 transitions. [2020-10-20 08:01:42,720 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2020-10-20 08:01:42,720 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2020-10-20 08:01:42,720 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2020-10-20 08:01:42,721 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-20 08:01:42,721 INFO L691 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-20 08:01:42,721 INFO L714 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-20 08:01:42,721 INFO L594 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-20 08:01:42,721 INFO L427 BuchiCegarLoop]: ======== Iteration 10============ [2020-10-20 08:01:42,721 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2020-10-20 08:01:42,721 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-10-20 08:01:42,721 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2020-10-20 08:01:42,729 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 20.10 08:01:42 BoogieIcfgContainer [2020-10-20 08:01:42,729 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2020-10-20 08:01:42,729 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 08:01:42,729 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 08:01:42,730 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 08:01:42,730 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 08:01:08" (3/4) ... [2020-10-20 08:01:42,734 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-10-20 08:01:42,734 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 08:01:42,737 INFO L168 Benchmark]: Toolchain (without parser) took 34463.67 ms. Allocated memory was 37.2 MB in the beginning and 136.3 MB in the end (delta: 99.1 MB). Free memory was 19.3 MB in the beginning and 33.1 MB in the end (delta: -13.9 MB). Peak memory consumption was 85.2 MB. Max. memory is 14.3 GB. [2020-10-20 08:01:42,737 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 34.1 MB. Free memory was 10.6 MB in the beginning and 10.5 MB in the end (delta: 47.4 kB). Peak memory consumption was 47.4 kB. Max. memory is 14.3 GB. [2020-10-20 08:01:42,738 INFO L168 Benchmark]: CACSL2BoogieTranslator took 350.96 ms. Allocated memory was 37.2 MB in the beginning and 45.1 MB in the end (delta: 7.9 MB). Free memory was 18.5 MB in the beginning and 27.7 MB in the end (delta: -9.2 MB). Peak memory consumption was 9.9 MB. Max. memory is 14.3 GB. [2020-10-20 08:01:42,739 INFO L168 Benchmark]: Boogie Procedure Inliner took 46.10 ms. Allocated memory is still 45.1 MB. Free memory was 27.7 MB in the beginning and 26.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 14.3 GB. [2020-10-20 08:01:42,739 INFO L168 Benchmark]: Boogie Preprocessor took 32.33 ms. Allocated memory is still 45.1 MB. Free memory was 26.2 MB in the beginning and 25.0 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.2 MB. Max. memory is 14.3 GB. [2020-10-20 08:01:42,740 INFO L168 Benchmark]: RCFGBuilder took 284.43 ms. Allocated memory was 45.1 MB in the beginning and 46.7 MB in the end (delta: 1.6 MB). Free memory was 25.0 MB in the beginning and 25.3 MB in the end (delta: -296.8 kB). Peak memory consumption was 13.3 MB. Max. memory is 14.3 GB. [2020-10-20 08:01:42,740 INFO L168 Benchmark]: BuchiAutomizer took 33732.97 ms. Allocated memory was 46.7 MB in the beginning and 136.3 MB in the end (delta: 89.7 MB). Free memory was 25.3 MB in the beginning and 33.1 MB in the end (delta: -7.9 MB). Peak memory consumption was 81.8 MB. Max. memory is 14.3 GB. [2020-10-20 08:01:42,741 INFO L168 Benchmark]: Witness Printer took 4.77 ms. Allocated memory is still 136.3 MB. Free memory is still 33.1 MB. There was no memory consumed. Max. memory is 14.3 GB. [2020-10-20 08:01:42,744 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 34.1 MB. Free memory was 10.6 MB in the beginning and 10.5 MB in the end (delta: 47.4 kB). Peak memory consumption was 47.4 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 350.96 ms. Allocated memory was 37.2 MB in the beginning and 45.1 MB in the end (delta: 7.9 MB). Free memory was 18.5 MB in the beginning and 27.7 MB in the end (delta: -9.2 MB). Peak memory consumption was 9.9 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 46.10 ms. Allocated memory is still 45.1 MB. Free memory was 27.7 MB in the beginning and 26.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 32.33 ms. Allocated memory is still 45.1 MB. Free memory was 26.2 MB in the beginning and 25.0 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.2 MB. Max. memory is 14.3 GB. * RCFGBuilder took 284.43 ms. Allocated memory was 45.1 MB in the beginning and 46.7 MB in the end (delta: 1.6 MB). Free memory was 25.0 MB in the beginning and 25.3 MB in the end (delta: -296.8 kB). Peak memory consumption was 13.3 MB. Max. memory is 14.3 GB. * BuchiAutomizer took 33732.97 ms. Allocated memory was 46.7 MB in the beginning and 136.3 MB in the end (delta: 89.7 MB). Free memory was 25.3 MB in the beginning and 33.1 MB in the end (delta: -7.9 MB). Peak memory consumption was 81.8 MB. Max. memory is 14.3 GB. * Witness Printer took 4.77 ms. Allocated memory is still 136.3 MB. Free memory is still 33.1 MB. There was no memory consumed. Max. memory is 14.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 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 33.6s and 10 iterations. TraceHistogramMax:13. Analysis of lassos took 25.1s. 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 0.2s 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: 30ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 18 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 8 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 19.5s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...