./Ultimate.py --spec ../../sv-benchmarks/c/Termination.prp --file ../../sv-benchmarks/c/termination-crafted/MutualRecursion_1a_true-no-overflow_false-termination_true-valid-memsafety.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 5842f4b8 Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_73001ded-8033-4ed5-97a3-c2c61d1bbebc/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_73001ded-8033-4ed5-97a3-c2c61d1bbebc/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_73001ded-8033-4ed5-97a3-c2c61d1bbebc/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_73001ded-8033-4ed5-97a3-c2c61d1bbebc/bin-2019/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-crafted/MutualRecursion_1a_true-no-overflow_false-termination_true-valid-memsafety.c -s /tmp/vcloud-vcloud-master/worker/working_dir_73001ded-8033-4ed5-97a3-c2c61d1bbebc/bin-2019/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_73001ded-8033-4ed5-97a3-c2c61d1bbebc/bin-2019/uautomizer --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 0.1.23-5842f4b [2018-11-18 11:20:40,753 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-18 11:20:40,754 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-18 11:20:40,763 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-18 11:20:40,763 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-18 11:20:40,764 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-18 11:20:40,765 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-18 11:20:40,766 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-18 11:20:40,767 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-18 11:20:40,768 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-18 11:20:40,769 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-18 11:20:40,769 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-18 11:20:40,770 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-18 11:20:40,770 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-18 11:20:40,771 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-18 11:20:40,772 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-18 11:20:40,772 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-18 11:20:40,774 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-18 11:20:40,775 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-18 11:20:40,776 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-18 11:20:40,777 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-18 11:20:40,778 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-18 11:20:40,780 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-18 11:20:40,780 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-18 11:20:40,780 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-18 11:20:40,781 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-18 11:20:40,782 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-18 11:20:40,783 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-18 11:20:40,783 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-18 11:20:40,784 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-18 11:20:40,784 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-18 11:20:40,785 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-18 11:20:40,785 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-18 11:20:40,785 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-18 11:20:40,786 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-18 11:20:40,787 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-18 11:20:40,787 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_73001ded-8033-4ed5-97a3-c2c61d1bbebc/bin-2019/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf [2018-11-18 11:20:40,798 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-18 11:20:40,798 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-18 11:20:40,799 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-18 11:20:40,799 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-18 11:20:40,800 INFO L133 SettingsManager]: * Use SBE=true [2018-11-18 11:20:40,800 INFO L131 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2018-11-18 11:20:40,800 INFO L133 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2018-11-18 11:20:40,800 INFO L133 SettingsManager]: * Use old map elimination=false [2018-11-18 11:20:40,800 INFO L133 SettingsManager]: * Use external solver (rank synthesis)=false [2018-11-18 11:20:40,800 INFO L133 SettingsManager]: * Use only trivial implications for array writes=true [2018-11-18 11:20:40,800 INFO L133 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2018-11-18 11:20:40,801 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-18 11:20:40,801 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-11-18 11:20:40,801 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-18 11:20:40,801 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-18 11:20:40,801 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2018-11-18 11:20:40,801 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2018-11-18 11:20:40,801 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2018-11-18 11:20:40,801 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-18 11:20:40,802 INFO L133 SettingsManager]: * Assume nondeterminstic values are in range=false [2018-11-18 11:20:40,803 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-18 11:20:40,803 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2018-11-18 11:20:40,803 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-18 11:20:40,803 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-18 11:20:40,803 INFO L133 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2018-11-18 11:20:40,803 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-18 11:20:40,803 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-18 11:20:40,803 INFO L133 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2018-11-18 11:20:40,804 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-11-18 11:20:40,804 INFO L133 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 -> /tmp/vcloud-vcloud-master/worker/working_dir_73001ded-8033-4ed5-97a3-c2c61d1bbebc/bin-2019/uautomizer 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 [2018-11-18 11:20:40,826 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-18 11:20:40,835 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-18 11:20:40,838 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-18 11:20:40,839 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-18 11:20:40,839 INFO L276 PluginConnector]: CDTParser initialized [2018-11-18 11:20:40,839 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_73001ded-8033-4ed5-97a3-c2c61d1bbebc/bin-2019/uautomizer/../../sv-benchmarks/c/termination-crafted/MutualRecursion_1a_true-no-overflow_false-termination_true-valid-memsafety.c [2018-11-18 11:20:40,879 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_73001ded-8033-4ed5-97a3-c2c61d1bbebc/bin-2019/uautomizer/data/018dcaf7a/1a7aca1268e246e096f0b3c8db9d2275/FLAG5cb3d1de1 [2018-11-18 11:20:41,269 INFO L307 CDTParser]: Found 1 translation units. [2018-11-18 11:20:41,269 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_73001ded-8033-4ed5-97a3-c2c61d1bbebc/sv-benchmarks/c/termination-crafted/MutualRecursion_1a_true-no-overflow_false-termination_true-valid-memsafety.c [2018-11-18 11:20:41,273 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_73001ded-8033-4ed5-97a3-c2c61d1bbebc/bin-2019/uautomizer/data/018dcaf7a/1a7aca1268e246e096f0b3c8db9d2275/FLAG5cb3d1de1 [2018-11-18 11:20:41,283 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_73001ded-8033-4ed5-97a3-c2c61d1bbebc/bin-2019/uautomizer/data/018dcaf7a/1a7aca1268e246e096f0b3c8db9d2275 [2018-11-18 11:20:41,285 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-18 11:20:41,286 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-18 11:20:41,287 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-18 11:20:41,287 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-18 11:20:41,289 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-18 11:20:41,289 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 11:20:41" (1/1) ... [2018-11-18 11:20:41,291 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48c1d420 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:20:41, skipping insertion in model container [2018-11-18 11:20:41,291 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 11:20:41" (1/1) ... [2018-11-18 11:20:41,296 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-18 11:20:41,306 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-18 11:20:41,406 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 11:20:41,408 INFO L191 MainTranslator]: Completed pre-run [2018-11-18 11:20:41,417 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 11:20:41,425 INFO L195 MainTranslator]: Completed translation [2018-11-18 11:20:41,425 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:20:41 WrapperNode [2018-11-18 11:20:41,425 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-18 11:20:41,425 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-18 11:20:41,425 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-18 11:20:41,425 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-18 11:20:41,430 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:20:41" (1/1) ... [2018-11-18 11:20:41,433 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:20:41" (1/1) ... [2018-11-18 11:20:41,444 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-18 11:20:41,444 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-18 11:20:41,444 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-18 11:20:41,444 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-18 11:20:41,449 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:20:41" (1/1) ... [2018-11-18 11:20:41,449 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:20:41" (1/1) ... [2018-11-18 11:20:41,449 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:20:41" (1/1) ... [2018-11-18 11:20:41,450 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:20:41" (1/1) ... [2018-11-18 11:20:41,451 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:20:41" (1/1) ... [2018-11-18 11:20:41,452 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:20:41" (1/1) ... [2018-11-18 11:20:41,452 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:20:41" (1/1) ... [2018-11-18 11:20:41,453 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-18 11:20:41,453 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-18 11:20:41,453 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-18 11:20:41,453 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-18 11:20:41,454 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:20:41" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_73001ded-8033-4ed5-97a3-c2c61d1bbebc/bin-2019/uautomizer/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 [2018-11-18 11:20:41,524 INFO L130 BoogieDeclarations]: Found specification of procedure f [2018-11-18 11:20:41,525 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2018-11-18 11:20:41,525 INFO L130 BoogieDeclarations]: Found specification of procedure g [2018-11-18 11:20:41,525 INFO L138 BoogieDeclarations]: Found implementation of procedure g [2018-11-18 11:20:41,525 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-18 11:20:41,525 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-18 11:20:41,610 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-18 11:20:41,610 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 11:20:41 BoogieIcfgContainer [2018-11-18 11:20:41,610 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-18 11:20:41,611 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2018-11-18 11:20:41,611 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2018-11-18 11:20:41,613 INFO L276 PluginConnector]: BuchiAutomizer initialized [2018-11-18 11:20:41,613 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-11-18 11:20:41,613 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 18.11 11:20:41" (1/3) ... [2018-11-18 11:20:41,614 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@3e8de428 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 18.11 11:20:41, skipping insertion in model container [2018-11-18 11:20:41,614 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-11-18 11:20:41,614 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 11:20:41" (2/3) ... [2018-11-18 11:20:41,614 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@3e8de428 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 18.11 11:20:41, skipping insertion in model container [2018-11-18 11:20:41,614 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-11-18 11:20:41,615 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 11:20:41" (3/3) ... [2018-11-18 11:20:41,616 INFO L375 chiAutomizerObserver]: Analyzing ICFG MutualRecursion_1a_true-no-overflow_false-termination_true-valid-memsafety.c [2018-11-18 11:20:41,646 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-18 11:20:41,646 INFO L374 BuchiCegarLoop]: Interprodecural is true [2018-11-18 11:20:41,646 INFO L375 BuchiCegarLoop]: Hoare is false [2018-11-18 11:20:41,647 INFO L376 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2018-11-18 11:20:41,647 INFO L377 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-18 11:20:41,647 INFO L378 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-18 11:20:41,647 INFO L379 BuchiCegarLoop]: Difference is false [2018-11-18 11:20:41,647 INFO L380 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-18 11:20:41,647 INFO L383 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2018-11-18 11:20:41,655 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 21 states. [2018-11-18 11:20:41,672 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 8 [2018-11-18 11:20:41,672 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-18 11:20:41,672 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-18 11:20:41,679 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2018-11-18 11:20:41,679 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1] [2018-11-18 11:20:41,679 INFO L442 BuchiCegarLoop]: ======== Iteration 1============ [2018-11-18 11:20:41,679 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 21 states. [2018-11-18 11:20:41,681 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 8 [2018-11-18 11:20:41,681 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-18 11:20:41,681 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-18 11:20:41,682 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2018-11-18 11:20:41,682 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1] [2018-11-18 11:20:41,688 INFO L794 eck$LassoCheckResult]: Stem: 13#ULTIMATE.startENTRYtrue assume { :begin_inline_ULTIMATE.init } true; 11#L-1true assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res;havoc main_#t~nondet4, main_#t~ret5, main_~x~0;main_~x~0 := main_#t~nondet4;havoc main_#t~nondet4; 3#L26true call main_#t~ret5 := g(main_~x~0);< 14#gENTRYtrue [2018-11-18 11:20:41,689 INFO L796 eck$LassoCheckResult]: Loop: 14#gENTRYtrue ~x := #in~x; 9#L19true assume !(~x <= 0); 7#L20true call #t~ret2 := f(~x - 1);< 15#fENTRYtrue ~x := #in~x; 19#L13true assume !(~x <= 0); 16#L14true call #t~ret0 := g(~x);< 14#gENTRYtrue [2018-11-18 11:20:41,693 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 11:20:41,694 INFO L82 PathProgramCache]: Analyzing trace with hash 47743, now seen corresponding path program 1 times [2018-11-18 11:20:41,697 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 11:20:41,697 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 11:20:41,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:20:41,734 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 11:20:41,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:20:41,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 11:20:41,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 11:20:41,756 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 11:20:41,756 INFO L82 PathProgramCache]: Analyzing trace with hash 1158065693, now seen corresponding path program 1 times [2018-11-18 11:20:41,756 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 11:20:41,757 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 11:20:41,757 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:20:41,757 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 11:20:41,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:20:41,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 11:20:41,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 11:20:41,770 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 11:20:41,770 INFO L82 PathProgramCache]: Analyzing trace with hash -1788538341, now seen corresponding path program 1 times [2018-11-18 11:20:41,770 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 11:20:41,770 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 11:20:41,770 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:20:41,771 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 11:20:41,771 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:20:41,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 11:20:41,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 11:20:41,878 INFO L216 LassoAnalysis]: Preferences: [2018-11-18 11:20:41,878 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-18 11:20:41,878 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-18 11:20:41,879 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-18 11:20:41,879 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-18 11:20:41,879 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 11:20:41,879 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-18 11:20:41,879 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-18 11:20:41,879 INFO L131 ssoRankerPreferences]: Filename of dumped script: MutualRecursion_1a_true-no-overflow_false-termination_true-valid-memsafety.c_Iteration1_Loop [2018-11-18 11:20:41,879 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-18 11:20:41,880 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-18 11:20:41,895 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 11:20:41,899 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 11:20:41,900 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 11:20:41,901 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 11:20:41,918 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 11:20:41,923 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 11:20:41,925 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 11:20:41,927 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 11:20:41,931 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 11:20:41,934 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 11:20:41,987 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-18 11:20:41,988 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_73001ded-8033-4ed5-97a3-c2c61d1bbebc/bin-2019/uautomizer/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 [2018-11-18 11:20:41,992 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 11:20:41,992 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 11:20:42,000 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 11:20:42,001 INFO L448 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 /tmp/vcloud-vcloud-master/worker/working_dir_73001ded-8033-4ed5-97a3-c2c61d1bbebc/bin-2019/uautomizer/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 [2018-11-18 11:20:42,016 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 11:20:42,016 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 11:20:42,021 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 11:20:42,022 INFO L448 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 /tmp/vcloud-vcloud-master/worker/working_dir_73001ded-8033-4ed5-97a3-c2c61d1bbebc/bin-2019/uautomizer/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 [2018-11-18 11:20:42,037 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 11:20:42,037 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 11:20:42,040 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 11:20:42,040 INFO L448 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 /tmp/vcloud-vcloud-master/worker/working_dir_73001ded-8033-4ed5-97a3-c2c61d1bbebc/bin-2019/uautomizer/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 [2018-11-18 11:20:42,054 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 11:20:42,054 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 11:20:42,056 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 11:20:42,056 INFO L448 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 /tmp/vcloud-vcloud-master/worker/working_dir_73001ded-8033-4ed5-97a3-c2c61d1bbebc/bin-2019/uautomizer/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 [2018-11-18 11:20:42,071 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 11:20:42,071 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_73001ded-8033-4ed5-97a3-c2c61d1bbebc/bin-2019/uautomizer/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 [2018-11-18 11:20:42,095 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-18 11:20:42,096 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 11:20:42,135 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-18 11:20:42,136 INFO L216 LassoAnalysis]: Preferences: [2018-11-18 11:20:42,136 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-18 11:20:42,136 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-18 11:20:42,136 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-18 11:20:42,136 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-18 11:20:42,136 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 11:20:42,136 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-18 11:20:42,136 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-18 11:20:42,136 INFO L131 ssoRankerPreferences]: Filename of dumped script: MutualRecursion_1a_true-no-overflow_false-termination_true-valid-memsafety.c_Iteration1_Loop [2018-11-18 11:20:42,136 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-18 11:20:42,136 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-18 11:20:42,137 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 11:20:42,140 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 11:20:42,141 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 11:20:42,146 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 11:20:42,147 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 11:20:42,150 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 11:20:42,151 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 11:20:42,155 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 11:20:42,157 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 11:20:42,159 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 11:20:42,206 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-18 11:20:42,210 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-18 11:20:42,212 INFO L122 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 [2018-11-18 11:20:42,213 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 11:20:42,213 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 11:20:42,213 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 11:20:42,214 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 11:20:42,214 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 11:20:42,215 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 11:20:42,215 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 11:20:42,218 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-18 11:20:42,218 INFO L122 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 [2018-11-18 11:20:42,218 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 11:20:42,218 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 11:20:42,219 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 11:20:42,219 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 11:20:42,219 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 11:20:42,219 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 11:20:42,219 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 11:20:42,220 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-18 11:20:42,220 INFO L122 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 [2018-11-18 11:20:42,221 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 11:20:42,221 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 11:20:42,221 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 11:20:42,221 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 11:20:42,221 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 11:20:42,222 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 11:20:42,222 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 11:20:42,222 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-18 11:20:42,223 INFO L122 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 [2018-11-18 11:20:42,223 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 11:20:42,223 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 11:20:42,223 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 11:20:42,223 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 11:20:42,224 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 11:20:42,224 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 11:20:42,224 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 11:20:42,225 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-18 11:20:42,225 INFO L122 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 [2018-11-18 11:20:42,225 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 11:20:42,226 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 11:20:42,226 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 11:20:42,226 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 11:20:42,226 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 11:20:42,226 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 11:20:42,226 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 11:20:42,227 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-18 11:20:42,228 INFO L122 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 [2018-11-18 11:20:42,228 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 11:20:42,228 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 11:20:42,228 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 11:20:42,228 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 11:20:42,229 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 11:20:42,229 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 11:20:42,229 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 11:20:42,230 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-18 11:20:42,230 INFO L122 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 [2018-11-18 11:20:42,231 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 11:20:42,231 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 11:20:42,231 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 11:20:42,231 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 11:20:42,231 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 11:20:42,232 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 11:20:42,232 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 11:20:42,237 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-18 11:20:42,239 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-11-18 11:20:42,239 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-11-18 11:20:42,240 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-18 11:20:42,240 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-18 11:20:42,241 INFO L518 LassoAnalysis]: Proved termination. [2018-11-18 11:20:42,241 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(g_#in~x) = 1*g_#in~x Supporting invariants [] [2018-11-18 11:20:42,242 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-18 11:20:42,272 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 11:20:42,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 11:20:42,286 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 11:20:42,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 11:20:42,306 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 11:20:42,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 11:20:42,391 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 [2018-11-18 11:20:42,393 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 21 states. Second operand 6 states. [2018-11-18 11:20:42,593 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 21 states.. Second operand 6 states. Result 63 states and 82 transitions. Complement of second has 24 states. [2018-11-18 11:20:42,593 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 [2018-11-18 11:20:42,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-11-18 11:20:42,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 15 transitions. [2018-11-18 11:20:42,598 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 15 transitions. Stem has 3 letters. Loop has 6 letters. [2018-11-18 11:20:42,599 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 11:20:42,599 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 15 transitions. Stem has 9 letters. Loop has 6 letters. [2018-11-18 11:20:42,600 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 11:20:42,600 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 15 transitions. Stem has 3 letters. Loop has 12 letters. [2018-11-18 11:20:42,600 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 11:20:42,601 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 63 states and 82 transitions. [2018-11-18 11:20:42,605 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 8 [2018-11-18 11:20:42,612 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 63 states to 46 states and 60 transitions. [2018-11-18 11:20:42,613 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 30 [2018-11-18 11:20:42,613 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 31 [2018-11-18 11:20:42,614 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 60 transitions. [2018-11-18 11:20:42,616 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-18 11:20:42,616 INFO L705 BuchiCegarLoop]: Abstraction has 46 states and 60 transitions. [2018-11-18 11:20:42,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states and 60 transitions. [2018-11-18 11:20:42,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2018-11-18 11:20:42,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-11-18 11:20:42,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 57 transitions. [2018-11-18 11:20:42,641 INFO L728 BuchiCegarLoop]: Abstraction has 45 states and 57 transitions. [2018-11-18 11:20:42,641 INFO L608 BuchiCegarLoop]: Abstraction has 45 states and 57 transitions. [2018-11-18 11:20:42,641 INFO L442 BuchiCegarLoop]: ======== Iteration 2============ [2018-11-18 11:20:42,641 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 45 states and 57 transitions. [2018-11-18 11:20:42,642 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 8 [2018-11-18 11:20:42,642 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-18 11:20:42,643 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-18 11:20:42,643 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 11:20:42,643 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 11:20:42,644 INFO L794 eck$LassoCheckResult]: Stem: 191#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 190#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res;havoc main_#t~nondet4, main_#t~ret5, main_~x~0;main_~x~0 := main_#t~nondet4;havoc main_#t~nondet4; 164#L26 call main_#t~ret5 := g(main_~x~0);< 165#gENTRY ~x := #in~x; 192#L19 assume !(~x <= 0); 175#L20 call #t~ret2 := f(~x - 1);< 181#fENTRY ~x := #in~x; 195#L13 assume !(~x <= 0); 167#L14 call #t~ret0 := g(~x);< 193#gENTRY ~x := #in~x; 185#L19 assume ~x <= 0;#res := 0; 186#gFINAL assume true; 178#gEXIT >#27#return; 168#L14-1 [2018-11-18 11:20:42,644 INFO L796 eck$LassoCheckResult]: Loop: 168#L14-1 call #t~ret1 := g(1 + ~x);< 198#gENTRY ~x := #in~x; 204#L19 assume !(~x <= 0); 196#L20 call #t~ret2 := f(~x - 1);< 203#fENTRY ~x := #in~x; 202#L13 assume !(~x <= 0); 169#L14 call #t~ret0 := g(~x);< 198#gENTRY ~x := #in~x; 204#L19 assume ~x <= 0;#res := 0; 166#gFINAL assume true; 170#gEXIT >#27#return; 168#L14-1 [2018-11-18 11:20:42,644 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 11:20:42,644 INFO L82 PathProgramCache]: Analyzing trace with hash 1510789928, now seen corresponding path program 1 times [2018-11-18 11:20:42,644 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 11:20:42,645 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 11:20:42,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:20:42,645 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 11:20:42,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:20:42,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 11:20:42,695 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-18 11:20:42,696 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 11:20:42,697 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-18 11:20:42,698 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-11-18 11:20:42,699 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 11:20:42,699 INFO L82 PathProgramCache]: Analyzing trace with hash -1553130012, now seen corresponding path program 1 times [2018-11-18 11:20:42,699 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 11:20:42,699 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 11:20:42,699 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:20:42,700 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 11:20:42,700 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:20:42,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 11:20:42,726 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-11-18 11:20:42,726 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 11:20:42,726 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-18 11:20:42,727 INFO L811 eck$LassoCheckResult]: loop already infeasible [2018-11-18 11:20:42,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 11:20:42,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-18 11:20:42,729 INFO L87 Difference]: Start difference. First operand 45 states and 57 transitions. cyclomatic complexity: 14 Second operand 5 states. [2018-11-18 11:20:42,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 11:20:42,763 INFO L93 Difference]: Finished difference Result 49 states and 60 transitions. [2018-11-18 11:20:42,763 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-18 11:20:42,764 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 49 states and 60 transitions. [2018-11-18 11:20:42,765 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 8 [2018-11-18 11:20:42,766 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 49 states to 45 states and 56 transitions. [2018-11-18 11:20:42,766 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 31 [2018-11-18 11:20:42,766 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 31 [2018-11-18 11:20:42,766 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 56 transitions. [2018-11-18 11:20:42,766 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-18 11:20:42,766 INFO L705 BuchiCegarLoop]: Abstraction has 45 states and 56 transitions. [2018-11-18 11:20:42,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states and 56 transitions. [2018-11-18 11:20:42,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-11-18 11:20:42,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-11-18 11:20:42,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 56 transitions. [2018-11-18 11:20:42,771 INFO L728 BuchiCegarLoop]: Abstraction has 45 states and 56 transitions. [2018-11-18 11:20:42,771 INFO L608 BuchiCegarLoop]: Abstraction has 45 states and 56 transitions. [2018-11-18 11:20:42,771 INFO L442 BuchiCegarLoop]: ======== Iteration 3============ [2018-11-18 11:20:42,771 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 45 states and 56 transitions. [2018-11-18 11:20:42,772 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 8 [2018-11-18 11:20:42,772 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-18 11:20:42,773 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-18 11:20:42,774 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 11:20:42,774 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 11:20:42,774 INFO L794 eck$LassoCheckResult]: Stem: 300#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 299#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res;havoc main_#t~nondet4, main_#t~ret5, main_~x~0;main_~x~0 := main_#t~nondet4;havoc main_#t~nondet4; 271#L26 call main_#t~ret5 := g(main_~x~0);< 272#gENTRY ~x := #in~x; 301#L19 assume !(~x <= 0); 284#L20 call #t~ret2 := f(~x - 1);< 289#fENTRY ~x := #in~x; 304#L13 assume !(~x <= 0); 275#L14 call #t~ret0 := g(~x);< 302#gENTRY ~x := #in~x; 295#L19 assume !(~x <= 0); 287#L20 call #t~ret2 := f(~x - 1);< 288#fENTRY ~x := #in~x; 315#L13 assume ~x <= 0;#res := 0; 314#fFINAL assume true; 313#fEXIT >#31#return; 291#L20-1 call #t~ret3 := f(~x - 2);< 297#fENTRY ~x := #in~x; 303#L13 assume ~x <= 0;#res := 0; 306#fFINAL assume true; 290#fEXIT >#33#return; 292#L20-2 #res := #t~ret2 + #t~ret3;havoc #t~ret2;havoc #t~ret3; 273#gFINAL assume true; 277#gEXIT >#27#return; 276#L14-1 [2018-11-18 11:20:42,774 INFO L796 eck$LassoCheckResult]: Loop: 276#L14-1 call #t~ret1 := g(1 + ~x);< 305#gENTRY ~x := #in~x; 312#L19 assume !(~x <= 0); 280#L20 call #t~ret2 := f(~x - 1);< 310#fENTRY ~x := #in~x; 309#L13 assume !(~x <= 0); 274#L14 call #t~ret0 := g(~x);< 305#gENTRY ~x := #in~x; 312#L19 assume !(~x <= 0); 280#L20 call #t~ret2 := f(~x - 1);< 310#fENTRY ~x := #in~x; 309#L13 assume ~x <= 0;#res := 0; 278#fFINAL assume true; 281#fEXIT >#31#return; 279#L20-1 call #t~ret3 := f(~x - 2);< 310#fENTRY ~x := #in~x; 309#L13 assume ~x <= 0;#res := 0; 278#fFINAL assume true; 281#fEXIT >#33#return; 292#L20-2 #res := #t~ret2 + #t~ret3;havoc #t~ret2;havoc #t~ret3; 273#gFINAL assume true; 277#gEXIT >#27#return; 276#L14-1 [2018-11-18 11:20:42,774 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 11:20:42,774 INFO L82 PathProgramCache]: Analyzing trace with hash 1263731607, now seen corresponding path program 1 times [2018-11-18 11:20:42,775 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 11:20:42,775 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 11:20:42,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:20:42,776 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 11:20:42,776 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:20:42,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 11:20:42,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 11:20:42,789 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 11:20:42,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1714809691, now seen corresponding path program 1 times [2018-11-18 11:20:42,789 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 11:20:42,789 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 11:20:42,790 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:20:42,790 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 11:20:42,790 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:20:42,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 11:20:42,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 11:20:42,803 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 11:20:42,803 INFO L82 PathProgramCache]: Analyzing trace with hash 790919793, now seen corresponding path program 1 times [2018-11-18 11:20:42,804 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 11:20:42,804 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 11:20:42,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:20:42,804 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 11:20:42,805 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 11:20:42,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 11:20:42,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 11:20:43,174 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 18.11 11:20:43 BoogieIcfgContainer [2018-11-18 11:20:43,175 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2018-11-18 11:20:43,175 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-18 11:20:43,175 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-18 11:20:43,175 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-18 11:20:43,175 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 11:20:41" (3/4) ... [2018-11-18 11:20:43,177 INFO L141 WitnessPrinter]: Generating witness for non-termination counterexample [2018-11-18 11:20:43,208 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_73001ded-8033-4ed5-97a3-c2c61d1bbebc/bin-2019/uautomizer/witness.graphml [2018-11-18 11:20:43,208 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-18 11:20:43,209 INFO L168 Benchmark]: Toolchain (without parser) took 1923.54 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 152.6 MB). Free memory was 953.8 MB in the beginning and 883.8 MB in the end (delta: 69.9 MB). Peak memory consumption was 222.5 MB. Max. memory is 11.5 GB. [2018-11-18 11:20:43,210 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 1.0 GB. Free memory is still 980.1 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 11:20:43,210 INFO L168 Benchmark]: CACSL2BoogieTranslator took 138.27 ms. Allocated memory is still 1.0 GB. Free memory was 953.8 MB in the beginning and 943.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-18 11:20:43,210 INFO L168 Benchmark]: Boogie Procedure Inliner took 18.44 ms. Allocated memory is still 1.0 GB. Free memory was 943.0 MB in the beginning and 940.3 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-18 11:20:43,211 INFO L168 Benchmark]: Boogie Preprocessor took 8.86 ms. Allocated memory is still 1.0 GB. Free memory is still 940.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 11:20:43,211 INFO L168 Benchmark]: RCFGBuilder took 157.53 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 152.6 MB). Free memory was 940.3 MB in the beginning and 1.1 GB in the end (delta: -195.8 MB). Peak memory consumption was 14.7 MB. Max. memory is 11.5 GB. [2018-11-18 11:20:43,211 INFO L168 Benchmark]: BuchiAutomizer took 1564.07 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 887.2 MB in the end (delta: 249.0 MB). Peak memory consumption was 249.0 MB. Max. memory is 11.5 GB. [2018-11-18 11:20:43,211 INFO L168 Benchmark]: Witness Printer took 33.26 ms. Allocated memory is still 1.2 GB. Free memory was 887.2 MB in the beginning and 883.8 MB in the end (delta: 3.3 MB). Peak memory consumption was 3.3 MB. Max. memory is 11.5 GB. [2018-11-18 11:20:43,213 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 1.0 GB. Free memory is still 980.1 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 138.27 ms. Allocated memory is still 1.0 GB. Free memory was 953.8 MB in the beginning and 943.0 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 18.44 ms. Allocated memory is still 1.0 GB. Free memory was 943.0 MB in the beginning and 940.3 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 8.86 ms. Allocated memory is still 1.0 GB. Free memory is still 940.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 157.53 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 152.6 MB). Free memory was 940.3 MB in the beginning and 1.1 GB in the end (delta: -195.8 MB). Peak memory consumption was 14.7 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 1564.07 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 887.2 MB in the end (delta: 249.0 MB). Peak memory consumption was 249.0 MB. Max. memory is 11.5 GB. * Witness Printer took 33.26 ms. Allocated memory is still 1.2 GB. Free memory was 887.2 MB in the beginning and 883.8 MB in the end (delta: 3.3 MB). Peak memory consumption was 3.3 MB. 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 45 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 1.5s and 3 iterations. TraceHistogramMax:3. Analysis of lassos took 1.0s. Construction of modules took 0.1s. Büchi inclusion checks took 0.2s. 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 45 states and ocurred in iteration 1. Nontrivial modules had stage [1, 0, 0, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 28 SDtfs, 22 SDslu, 45 SDs, 0 SdLazy, 90 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: 6ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 4 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 1 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.0s - 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@1e8a14fc=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@4d38df85=0, \result=0, \result=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@55d1895e=0, x=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@34f30292=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@2100d90d=0, \old(x)=1, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@5d6e5dab=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] RET return 0; [L20] EXPR f(x - 1) [L20] CALL, EXPR f(x - 2) [L13] COND TRUE x <= 0 [L13] RET return 0; [L20] EXPR f(x - 2) [L20] RET return f(x - 1) + f(x - 2); [L14] 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] RET return 0; [L20] EXPR f(x - 1) [L20] CALL, EXPR f(x - 2) [L13] COND TRUE x <= 0 [L13] RET return 0; [L20] EXPR f(x - 2) [L20] RET return f(x - 1) + f(x - 2); [L14] g(x) End of lasso representation. RESULT: Ultimate proved your program to be incorrect! Received shutdown request...