./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/termination-crafted/MutualRecursion_1a.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version f470102c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerTermination.xml -i ../sv-benchmarks/c/termination-crafted/MutualRecursion_1a.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-64bit-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 64bit --witnessprinter.graph.data.programhash c27ad91a5bec233234e07a14bfd5505e082df4cd .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(TERM) --- Real Ultimate output --- This is Ultimate 0.1.25-f470102 [2019-11-28 20:28:51,476 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-28 20:28:51,479 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-28 20:28:51,496 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-28 20:28:51,496 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-28 20:28:51,498 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-28 20:28:51,500 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-28 20:28:51,509 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-28 20:28:51,511 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-28 20:28:51,514 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-28 20:28:51,515 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-28 20:28:51,517 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-28 20:28:51,518 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-28 20:28:51,521 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-28 20:28:51,524 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-28 20:28:51,526 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-28 20:28:51,527 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-28 20:28:51,530 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-28 20:28:51,532 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-28 20:28:51,536 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-28 20:28:51,540 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-28 20:28:51,544 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-28 20:28:51,545 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-28 20:28:51,546 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-28 20:28:51,549 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-28 20:28:51,551 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-28 20:28:51,551 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-28 20:28:51,553 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-28 20:28:51,554 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-28 20:28:51,555 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-28 20:28:51,555 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-28 20:28:51,556 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-28 20:28:51,557 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-28 20:28:51,558 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-28 20:28:51,560 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-28 20:28:51,560 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-28 20:28:51,561 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-28 20:28:51,561 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-28 20:28:51,561 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-28 20:28:51,563 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-28 20:28:51,565 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-28 20:28:51,566 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-64bit-Automizer_Default.epf [2019-11-28 20:28:51,582 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-28 20:28:51,582 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-28 20:28:51,583 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-28 20:28:51,584 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-28 20:28:51,584 INFO L138 SettingsManager]: * Use SBE=true [2019-11-28 20:28:51,584 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2019-11-28 20:28:51,584 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2019-11-28 20:28:51,585 INFO L138 SettingsManager]: * Use old map elimination=false [2019-11-28 20:28:51,585 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2019-11-28 20:28:51,585 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2019-11-28 20:28:51,586 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2019-11-28 20:28:51,586 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-28 20:28:51,586 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-28 20:28:51,586 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-28 20:28:51,587 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-28 20:28:51,587 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2019-11-28 20:28:51,587 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2019-11-28 20:28:51,587 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2019-11-28 20:28:51,588 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-28 20:28:51,588 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2019-11-28 20:28:51,588 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-28 20:28:51,588 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2019-11-28 20:28:51,589 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-28 20:28:51,589 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-28 20:28:51,589 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2019-11-28 20:28:51,590 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-28 20:28:51,590 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-28 20:28:51,590 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-11-28 20:28:51,590 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2019-11-28 20:28:51,591 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2019-11-28 20:28:51,592 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 -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c27ad91a5bec233234e07a14bfd5505e082df4cd [2019-11-28 20:28:51,889 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-28 20:28:51,908 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-28 20:28:51,912 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-28 20:28:51,913 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-28 20:28:51,914 INFO L275 PluginConnector]: CDTParser initialized [2019-11-28 20:28:51,915 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-crafted/MutualRecursion_1a.c [2019-11-28 20:28:51,983 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7313d04aa/5ef4bc73d012497eae2d1c3abaedf130/FLAGdb039d11f [2019-11-28 20:28:52,444 INFO L306 CDTParser]: Found 1 translation units. [2019-11-28 20:28:52,445 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-crafted/MutualRecursion_1a.c [2019-11-28 20:28:52,453 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7313d04aa/5ef4bc73d012497eae2d1c3abaedf130/FLAGdb039d11f [2019-11-28 20:28:52,843 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7313d04aa/5ef4bc73d012497eae2d1c3abaedf130 [2019-11-28 20:28:52,847 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-28 20:28:52,849 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-28 20:28:52,850 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-28 20:28:52,850 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-28 20:28:52,854 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-28 20:28:52,855 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 08:28:52" (1/1) ... [2019-11-28 20:28:52,857 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12f92d61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:28:52, skipping insertion in model container [2019-11-28 20:28:52,858 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 08:28:52" (1/1) ... [2019-11-28 20:28:52,865 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-28 20:28:52,886 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-28 20:28:53,055 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 20:28:53,059 INFO L203 MainTranslator]: Completed pre-run [2019-11-28 20:28:53,075 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 20:28:53,089 INFO L208 MainTranslator]: Completed translation [2019-11-28 20:28:53,090 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:28:53 WrapperNode [2019-11-28 20:28:53,090 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-28 20:28:53,091 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-28 20:28:53,091 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-28 20:28:53,091 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-28 20:28:53,100 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:28:53" (1/1) ... [2019-11-28 20:28:53,106 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:28:53" (1/1) ... [2019-11-28 20:28:53,177 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-28 20:28:53,178 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-28 20:28:53,178 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-28 20:28:53,179 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-28 20:28:53,188 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:28:53" (1/1) ... [2019-11-28 20:28:53,188 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:28:53" (1/1) ... [2019-11-28 20:28:53,189 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:28:53" (1/1) ... [2019-11-28 20:28:53,190 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:28:53" (1/1) ... [2019-11-28 20:28:53,192 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:28:53" (1/1) ... [2019-11-28 20:28:53,194 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:28:53" (1/1) ... [2019-11-28 20:28:53,195 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:28:53" (1/1) ... [2019-11-28 20:28:53,197 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-28 20:28:53,197 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-28 20:28:53,197 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-28 20:28:53,198 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-28 20:28:53,199 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:28:53" (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 [2019-11-28 20:28:53,259 INFO L130 BoogieDeclarations]: Found specification of procedure f [2019-11-28 20:28:53,259 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2019-11-28 20:28:53,259 INFO L130 BoogieDeclarations]: Found specification of procedure g [2019-11-28 20:28:53,259 INFO L138 BoogieDeclarations]: Found implementation of procedure g [2019-11-28 20:28:53,259 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-28 20:28:53,260 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-28 20:28:53,423 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-28 20:28:53,423 INFO L287 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-28 20:28:53,425 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 08:28:53 BoogieIcfgContainer [2019-11-28 20:28:53,425 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-28 20:28:53,426 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2019-11-28 20:28:53,426 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2019-11-28 20:28:53,429 INFO L275 PluginConnector]: BuchiAutomizer initialized [2019-11-28 20:28:53,430 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-28 20:28:53,431 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 28.11 08:28:52" (1/3) ... [2019-11-28 20:28:53,432 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@7fbbd6d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 28.11 08:28:53, skipping insertion in model container [2019-11-28 20:28:53,432 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-28 20:28:53,432 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:28:53" (2/3) ... [2019-11-28 20:28:53,433 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@7fbbd6d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 28.11 08:28:53, skipping insertion in model container [2019-11-28 20:28:53,433 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-28 20:28:53,433 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 08:28:53" (3/3) ... [2019-11-28 20:28:53,435 INFO L371 chiAutomizerObserver]: Analyzing ICFG MutualRecursion_1a.c [2019-11-28 20:28:53,512 INFO L356 BuchiCegarLoop]: Interprodecural is true [2019-11-28 20:28:53,515 INFO L357 BuchiCegarLoop]: Hoare is false [2019-11-28 20:28:53,515 INFO L358 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2019-11-28 20:28:53,518 INFO L359 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-28 20:28:53,518 INFO L360 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-28 20:28:53,518 INFO L361 BuchiCegarLoop]: Difference is false [2019-11-28 20:28:53,519 INFO L362 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-28 20:28:53,519 INFO L365 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2019-11-28 20:28:53,554 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 20 states. [2019-11-28 20:28:53,595 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 8 [2019-11-28 20:28:53,596 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 20:28:53,596 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 20:28:53,603 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2019-11-28 20:28:53,603 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1] [2019-11-28 20:28:53,604 INFO L424 BuchiCegarLoop]: ======== Iteration 1============ [2019-11-28 20:28:53,604 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 20 states. [2019-11-28 20:28:53,607 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 8 [2019-11-28 20:28:53,607 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 20:28:53,607 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 20:28:53,607 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2019-11-28 20:28:53,608 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1] [2019-11-28 20:28:53,614 INFO L794 eck$LassoCheckResult]: Stem: 12#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet4, main_#t~ret5, main_~x~0;main_~x~0 := main_#t~nondet4;havoc main_#t~nondet4; 3#L26true call main_#t~ret5 := g(main_~x~0);< 13#gENTRYtrue [2019-11-28 20:28:53,614 INFO L796 eck$LassoCheckResult]: Loop: 13#gENTRYtrue ~x := #in~x; 9#L19true assume !(~x <= 0); 7#L20true call #t~ret2 := f(~x - 1);< 14#fENTRYtrue ~x := #in~x; 18#L13true assume !(~x <= 0); 15#L14true call #t~ret0 := g(~x);< 13#gENTRYtrue [2019-11-28 20:28:53,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:28:53,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1583, now seen corresponding path program 1 times [2019-11-28 20:28:53,630 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 20:28:53,631 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589309787] [2019-11-28 20:28:53,631 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 20:28:53,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 20:28:53,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 20:28:53,706 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 20:28:53,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:28:53,708 INFO L82 PathProgramCache]: Analyzing trace with hash 1158035901, now seen corresponding path program 1 times [2019-11-28 20:28:53,708 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 20:28:53,709 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884625211] [2019-11-28 20:28:53,709 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 20:28:53,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 20:28:53,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 20:28:53,735 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 20:28:53,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:28:53,737 INFO L82 PathProgramCache]: Analyzing trace with hash 734553451, now seen corresponding path program 1 times [2019-11-28 20:28:53,737 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 20:28:53,738 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571973433] [2019-11-28 20:28:53,738 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 20:28:53,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 20:28:53,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 20:28:53,755 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 20:28:53,974 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 20:28:53,975 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 20:28:53,975 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 20:28:53,976 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 20:28:53,976 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-28 20:28:53,976 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 20:28:53,977 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 20:28:53,977 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 20:28:53,977 INFO L133 ssoRankerPreferences]: Filename of dumped script: MutualRecursion_1a.c_Iteration1_Loop [2019-11-28 20:28:53,977 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 20:28:53,978 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 20:28:54,001 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 20:28:54,009 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 20:28:54,012 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 20:28:54,016 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 20:28:54,020 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 20:28:54,032 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 20:28:54,037 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 20:28:54,040 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 20:28:54,044 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 20:28:54,049 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 20:28:54,112 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 20:28:54,113 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) [2019-11-28 20:28:54,121 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 20:28:54,121 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 20:28:54,130 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 20:28:54,131 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {f_#res=0} Honda state: {f_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 20:28:54,141 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 20:28:54,141 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 20:28:54,146 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 20:28:54,146 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#t~ret2=0} Honda state: {g_#t~ret2=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 20:28:54,156 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 20:28:54,156 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 20:28:54,162 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 20:28:54,162 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#t~ret3=0} Honda state: {g_#t~ret3=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 [2019-11-28 20:28:54,173 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 20:28:54,173 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 20:28:54,176 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-28 20:28:54,177 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#res=0} Honda state: {g_#res=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 [2019-11-28 20:28:54,199 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-28 20:28:54,199 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 [2019-11-28 20:28:54,215 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-28 20:28:54,215 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-28 20:28:54,283 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-28 20:28:54,286 INFO L210 LassoAnalysis]: Preferences: [2019-11-28 20:28:54,286 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-28 20:28:54,286 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-28 20:28:54,286 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-28 20:28:54,286 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-28 20:28:54,287 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 20:28:54,287 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-28 20:28:54,287 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-28 20:28:54,287 INFO L133 ssoRankerPreferences]: Filename of dumped script: MutualRecursion_1a.c_Iteration1_Loop [2019-11-28 20:28:54,287 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-28 20:28:54,287 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-28 20:28:54,290 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 20:28:54,293 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 20:28:54,297 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 20:28:54,301 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 20:28:54,306 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 20:28:54,309 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 20:28:54,312 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 20:28:54,319 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 20:28:54,322 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 20:28:54,326 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-28 20:28:54,379 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-28 20:28:54,385 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) [2019-11-28 20:28:54,406 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 [2019-11-28 20:28:54,409 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 20:28:54,409 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 20:28:54,410 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 20:28:54,410 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 20:28:54,410 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 20:28:54,413 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 20:28:54,413 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 [2019-11-28 20:28:54,417 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) [2019-11-28 20:28:54,434 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 [2019-11-28 20:28:54,436 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 20:28:54,436 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 20:28:54,437 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 20:28:54,437 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 20:28:54,437 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 20:28:54,438 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 20:28:54,438 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 [2019-11-28 20:28:54,440 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) [2019-11-28 20:28:54,463 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 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 20:28:54,465 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 20:28:54,465 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 20:28:54,466 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 20:28:54,466 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 20:28:54,466 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 20:28:54,468 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 20:28:54,468 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 20:28:54,470 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) [2019-11-28 20:28:54,487 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 [2019-11-28 20:28:54,490 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 20:28:54,491 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 20:28:54,491 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 20:28:54,491 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 20:28:54,491 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 20:28:54,493 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 20:28:54,493 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 [2019-11-28 20:28:54,496 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 20:28:54,512 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 [2019-11-28 20:28:54,514 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 20:28:54,515 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 20:28:54,515 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 20:28:54,515 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 20:28:54,515 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 20:28:54,516 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 20:28:54,517 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 20:28:54,520 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 20:28:54,530 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 [2019-11-28 20:28:54,532 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 20:28:54,532 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 20:28:54,532 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 20:28:54,532 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 20:28:54,533 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 20:28:54,534 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 20:28:54,534 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 20:28:54,537 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 20:28:54,552 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 [2019-11-28 20:28:54,554 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-28 20:28:54,555 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-28 20:28:54,555 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-28 20:28:54,555 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-28 20:28:54,555 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-28 20:28:54,557 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-28 20:28:54,557 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-28 20:28:54,560 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-28 20:28:54,565 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-28 20:28:54,565 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 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-28 20:28:54,580 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-28 20:28:54,580 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-28 20:28:54,581 INFO L510 LassoAnalysis]: Proved termination. [2019-11-28 20:28:54,581 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(g_#in~x) = 1*g_#in~x Supporting invariants [] [2019-11-28 20:28:54,587 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-28 20:28:54,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:28:54,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:28:54,646 INFO L264 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-28 20:28:54,648 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 20:28:54,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:28:54,686 INFO L264 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-28 20:28:54,689 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 20:28:54,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 20:28:54,799 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 5 loop predicates [2019-11-28 20:28:54,801 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 20 states. Second operand 6 states. [2019-11-28 20:28:55,031 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 20 states.. Second operand 6 states. Result 62 states and 81 transitions. Complement of second has 24 states. [2019-11-28 20:28:55,032 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 1 stem states 5 non-accepting loop states 1 accepting loop states [2019-11-28 20:28:55,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-11-28 20:28:55,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 14 transitions. [2019-11-28 20:28:55,037 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 14 transitions. Stem has 2 letters. Loop has 6 letters. [2019-11-28 20:28:55,039 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 20:28:55,039 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 14 transitions. Stem has 8 letters. Loop has 6 letters. [2019-11-28 20:28:55,040 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 20:28:55,040 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 14 transitions. Stem has 2 letters. Loop has 12 letters. [2019-11-28 20:28:55,040 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-28 20:28:55,041 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 62 states and 81 transitions. [2019-11-28 20:28:55,048 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 8 [2019-11-28 20:28:55,057 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 62 states to 45 states and 59 transitions. [2019-11-28 20:28:55,058 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 29 [2019-11-28 20:28:55,059 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 30 [2019-11-28 20:28:55,060 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 59 transitions. [2019-11-28 20:28:55,062 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 20:28:55,062 INFO L688 BuchiCegarLoop]: Abstraction has 45 states and 59 transitions. [2019-11-28 20:28:55,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states and 59 transitions. [2019-11-28 20:28:55,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2019-11-28 20:28:55,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-11-28 20:28:55,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 56 transitions. [2019-11-28 20:28:55,099 INFO L711 BuchiCegarLoop]: Abstraction has 44 states and 56 transitions. [2019-11-28 20:28:55,100 INFO L591 BuchiCegarLoop]: Abstraction has 44 states and 56 transitions. [2019-11-28 20:28:55,100 INFO L424 BuchiCegarLoop]: ======== Iteration 2============ [2019-11-28 20:28:55,100 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 44 states and 56 transitions. [2019-11-28 20:28:55,102 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 8 [2019-11-28 20:28:55,102 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 20:28:55,102 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 20:28:55,104 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 20:28:55,104 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 20:28:55,104 INFO L794 eck$LassoCheckResult]: Stem: 185#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet4, main_#t~ret5, main_~x~0;main_~x~0 := main_#t~nondet4;havoc main_#t~nondet4; 159#L26 call main_#t~ret5 := g(main_~x~0);< 160#gENTRY ~x := #in~x; 186#L19 assume !(~x <= 0); 168#L20 call #t~ret2 := f(~x - 1);< 173#fENTRY ~x := #in~x; 196#L13 assume !(~x <= 0); 162#L14 call #t~ret0 := g(~x);< 187#gENTRY ~x := #in~x; 177#L19 assume ~x <= 0;#res := 0; 161#gFINAL assume true; 163#gEXIT >#26#return; 171#L14-1 [2019-11-28 20:28:55,105 INFO L796 eck$LassoCheckResult]: Loop: 171#L14-1 call #t~ret1 := g(1 + ~x);< 192#gENTRY ~x := #in~x; 200#L19 assume !(~x <= 0); 191#L20 call #t~ret2 := f(~x - 1);< 181#fENTRY ~x := #in~x; 197#L13 assume !(~x <= 0); 180#L14 call #t~ret0 := g(~x);< 192#gENTRY ~x := #in~x; 200#L19 assume ~x <= 0;#res := 0; 184#gFINAL assume true; 202#gEXIT >#26#return; 171#L14-1 [2019-11-28 20:28:55,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:28:55,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1661600137, now seen corresponding path program 1 times [2019-11-28 20:28:55,106 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 20:28:55,106 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114598694] [2019-11-28 20:28:55,106 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 20:28:55,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:28:55,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:28:55,196 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-28 20:28:55,197 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114598694] [2019-11-28 20:28:55,197 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 20:28:55,198 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-28 20:28:55,199 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643131038] [2019-11-28 20:28:55,203 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-11-28 20:28:55,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:28:55,204 INFO L82 PathProgramCache]: Analyzing trace with hash -1499912510, now seen corresponding path program 1 times [2019-11-28 20:28:55,209 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 20:28:55,209 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163850405] [2019-11-28 20:28:55,209 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 20:28:55,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:28:55,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 20:28:55,250 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-28 20:28:55,250 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163850405] [2019-11-28 20:28:55,250 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 20:28:55,251 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-28 20:28:55,251 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417663067] [2019-11-28 20:28:55,251 INFO L811 eck$LassoCheckResult]: loop already infeasible [2019-11-28 20:28:55,252 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 20:28:55,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-28 20:28:55,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-28 20:28:55,256 INFO L87 Difference]: Start difference. First operand 44 states and 56 transitions. cyclomatic complexity: 14 Second operand 5 states. [2019-11-28 20:28:55,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 20:28:55,314 INFO L93 Difference]: Finished difference Result 48 states and 59 transitions. [2019-11-28 20:28:55,314 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-28 20:28:55,315 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 48 states and 59 transitions. [2019-11-28 20:28:55,318 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 8 [2019-11-28 20:28:55,320 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 48 states to 44 states and 55 transitions. [2019-11-28 20:28:55,320 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 30 [2019-11-28 20:28:55,320 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 30 [2019-11-28 20:28:55,321 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 55 transitions. [2019-11-28 20:28:55,321 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-28 20:28:55,321 INFO L688 BuchiCegarLoop]: Abstraction has 44 states and 55 transitions. [2019-11-28 20:28:55,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states and 55 transitions. [2019-11-28 20:28:55,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2019-11-28 20:28:55,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-11-28 20:28:55,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 55 transitions. [2019-11-28 20:28:55,328 INFO L711 BuchiCegarLoop]: Abstraction has 44 states and 55 transitions. [2019-11-28 20:28:55,328 INFO L591 BuchiCegarLoop]: Abstraction has 44 states and 55 transitions. [2019-11-28 20:28:55,328 INFO L424 BuchiCegarLoop]: ======== Iteration 3============ [2019-11-28 20:28:55,329 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 44 states and 55 transitions. [2019-11-28 20:28:55,330 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 8 [2019-11-28 20:28:55,330 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-28 20:28:55,330 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-28 20:28:55,332 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 20:28:55,332 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 20:28:55,333 INFO L794 eck$LassoCheckResult]: Stem: 300#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet4, main_#t~ret5, main_~x~0;main_~x~0 := main_#t~nondet4;havoc main_#t~nondet4; 272#L26 call main_#t~ret5 := g(main_~x~0);< 273#gENTRY ~x := #in~x; 296#L19 assume !(~x <= 0); 285#L20 call #t~ret2 := f(~x - 1);< 290#fENTRY ~x := #in~x; 309#L13 assume !(~x <= 0); 277#L14 call #t~ret0 := g(~x);< 302#gENTRY ~x := #in~x; 303#L19 assume !(~x <= 0); 288#L20 call #t~ret2 := f(~x - 1);< 289#fENTRY ~x := #in~x; 305#L13 assume ~x <= 0;#res := 0; 307#fFINAL assume true; 291#fEXIT >#30#return; 292#L20-1 call #t~ret3 := f(~x - 2);< 297#fENTRY ~x := #in~x; 315#L13 assume ~x <= 0;#res := 0; 314#fFINAL assume true; 311#fEXIT >#32#return; 299#L20-2 #res := #t~ret2 + #t~ret3;havoc #t~ret2;havoc #t~ret3; 274#gFINAL assume true; 278#gEXIT >#26#return; 275#L14-1 [2019-11-28 20:28:55,333 INFO L796 eck$LassoCheckResult]: Loop: 275#L14-1 call #t~ret1 := g(1 + ~x);< 301#gENTRY ~x := #in~x; 295#L19 assume !(~x <= 0); 280#L20 call #t~ret2 := f(~x - 1);< 313#fENTRY ~x := #in~x; 310#L13 assume !(~x <= 0); 276#L14 call #t~ret0 := g(~x);< 301#gENTRY ~x := #in~x; 295#L19 assume !(~x <= 0); 280#L20 call #t~ret2 := f(~x - 1);< 313#fENTRY ~x := #in~x; 310#L13 assume ~x <= 0;#res := 0; 279#fFINAL assume true; 282#fEXIT >#30#return; 281#L20-1 call #t~ret3 := f(~x - 2);< 313#fENTRY ~x := #in~x; 310#L13 assume ~x <= 0;#res := 0; 279#fFINAL assume true; 282#fEXIT >#32#return; 299#L20-2 #res := #t~ret2 + #t~ret3;havoc #t~ret2;havoc #t~ret3; 274#gFINAL assume true; 278#gEXIT >#26#return; 275#L14-1 [2019-11-28 20:28:55,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:28:55,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1603563642, now seen corresponding path program 1 times [2019-11-28 20:28:55,333 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 20:28:55,334 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759452218] [2019-11-28 20:28:55,334 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 20:28:55,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 20:28:55,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 20:28:55,358 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 20:28:55,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:28:55,359 INFO L82 PathProgramCache]: Analyzing trace with hash 1170922075, now seen corresponding path program 1 times [2019-11-28 20:28:55,359 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 20:28:55,359 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641454443] [2019-11-28 20:28:55,360 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 20:28:55,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 20:28:55,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 20:28:55,381 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 20:28:55,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 20:28:55,382 INFO L82 PathProgramCache]: Analyzing trace with hash 878037024, now seen corresponding path program 1 times [2019-11-28 20:28:55,382 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 20:28:55,382 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912870026] [2019-11-28 20:28:55,383 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 20:28:55,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 20:28:55,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-28 20:28:55,421 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-28 20:28:56,116 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 28.11 08:28:56 BoogieIcfgContainer [2019-11-28 20:28:56,119 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2019-11-28 20:28:56,119 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-28 20:28:56,119 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-28 20:28:56,120 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-28 20:28:56,120 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 08:28:53" (3/4) ... [2019-11-28 20:28:56,124 INFO L134 WitnessPrinter]: Generating witness for non-termination counterexample [2019-11-28 20:28:56,192 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-11-28 20:28:56,193 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-28 20:28:56,201 INFO L168 Benchmark]: Toolchain (without parser) took 3347.25 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 119.5 MB). Free memory was 952.3 MB in the beginning and 808.5 MB in the end (delta: 143.8 MB). Peak memory consumption was 263.3 MB. Max. memory is 11.5 GB. [2019-11-28 20:28:56,207 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 1.0 GB. Free memory is still 981.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 20:28:56,208 INFO L168 Benchmark]: CACSL2BoogieTranslator took 240.51 ms. Allocated memory is still 1.0 GB. Free memory was 952.3 MB in the beginning and 941.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-11-28 20:28:56,208 INFO L168 Benchmark]: Boogie Procedure Inliner took 86.61 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 119.5 MB). Free memory was 941.6 MB in the beginning and 1.1 GB in the end (delta: -174.3 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. [2019-11-28 20:28:56,209 INFO L168 Benchmark]: Boogie Preprocessor took 19.08 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 20:28:56,209 INFO L168 Benchmark]: RCFGBuilder took 227.95 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 17.9 MB). Peak memory consumption was 17.9 MB. Max. memory is 11.5 GB. [2019-11-28 20:28:56,210 INFO L168 Benchmark]: BuchiAutomizer took 2693.18 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 808.5 MB in the end (delta: 289.5 MB). Peak memory consumption was 289.5 MB. Max. memory is 11.5 GB. [2019-11-28 20:28:56,210 INFO L168 Benchmark]: Witness Printer took 74.87 ms. Allocated memory is still 1.1 GB. Free memory is still 808.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 20:28:56,216 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 1.0 GB. Free memory is still 981.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 240.51 ms. Allocated memory is still 1.0 GB. Free memory was 952.3 MB in the beginning and 941.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 86.61 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 119.5 MB). Free memory was 941.6 MB in the beginning and 1.1 GB in the end (delta: -174.3 MB). Peak memory consumption was 9.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 19.08 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 227.95 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 17.9 MB). Peak memory consumption was 17.9 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 2693.18 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 808.5 MB in the end (delta: 289.5 MB). Peak memory consumption was 289.5 MB. Max. memory is 11.5 GB. * Witness Printer took 74.87 ms. Allocated memory is still 1.1 GB. Free memory is still 808.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 2 terminating modules (1 trivial, 1 deterministic, 0 nondeterministic) and one nonterminating remainder module.One deterministic module has affine ranking function \old(x) and consists of 7 locations. 1 modules have a trivial ranking function, the largest among these consists of 5 locations. The remainder module has 44 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 2.6s and 3 iterations. TraceHistogramMax:3. Analysis of lassos took 1.8s. Construction of modules took 0.1s. Büchi inclusion checks took 0.3s. Highest rank in rank-based complementation 3. Minimization of det autom 0. Minimization of nondet autom 2. Automata minimization 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 44 states and ocurred in iteration 1. Nontrivial modules had stage [1, 0, 0, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 26 SDtfs, 22 SDslu, 41 SDs, 0 SdLazy, 81 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time LassoAnalysisResults: nont1 unkn0 SFLI0 SFLT1 conc0 concLT0 SILN0 SILU0 SILI1 SILT0 lasso0 LassoPreprocessingBenchmarks: Lassos: inital10 mio100 ax100 hnf100 lsp100 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq160 hnf93 smp100 dnf100 smp100 tf113 neg100 sie111 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 30ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 4 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 1 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.1s - TerminationAnalysisResult: Nontermination possible Buchi Automizer proved that your program is nonterminating for some inputs - FixpointNonTerminationResult [Line: 14]: Nontermination argument in form of an infinite program execution. Nontermination argument in form of an infinite execution State at position 0 is {} State at position 1 is {org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@4e1fb560=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@3e95ef0e=0, \result=0, \result=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@3d7425f2=0, x=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@14cb1990=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@1bd104=0, \old(x)=1, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@40928127=0, NULL=0, x=1, \result=0, \old(x)=0, x=0} - StatisticsResult: NonterminationArgumentStatistics Fixpoint - NonterminatingLassoResult [Line: 14]: Nonterminating execution Found a nonterminating execution for the following lasso shaped sequence of statements. Stem: [L25] int x = __VERIFIER_nondet_int(); [L26] CALL g(x) [L19] COND FALSE !(x <= 0) [L20] CALL, EXPR f(x - 1) [L13] COND FALSE !(x <= 0) [L14] CALL g(x) [L19] COND FALSE !(x <= 0) [L20] CALL, EXPR f(x - 1) [L13] COND TRUE x <= 0 [L13] return 0; [L20] RET, EXPR f(x - 1) [L20] CALL, EXPR f(x - 2) [L13] COND TRUE x <= 0 [L13] return 0; [L20] RET, EXPR f(x - 2) [L20] return f(x - 1) + f(x - 2); [L14] RET g(x) Loop: [L14] CALL g(x + 1) [L19] COND FALSE !(x <= 0) [L20] CALL, EXPR f(x - 1) [L13] COND FALSE !(x <= 0) [L14] CALL g(x) [L19] COND FALSE !(x <= 0) [L20] CALL, EXPR f(x - 1) [L13] COND TRUE x <= 0 [L13] return 0; [L20] RET, EXPR f(x - 1) [L20] CALL, EXPR f(x - 2) [L13] COND TRUE x <= 0 [L13] return 0; [L20] RET, EXPR f(x - 2) [L20] return f(x - 1) + f(x - 2); [L14] RET g(x) End of lasso representation. RESULT: Ultimate proved your program to be incorrect! Received shutdown request...