./Ultimate.py --spec ../../sv-benchmarks/c/Termination.prp --file ../../sv-benchmarks/c/termination-crafted/RecursiveMultiplication_true-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_f1c17bc4-c95d-444c-aeda-a306a2d729e2/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_f1c17bc4-c95d-444c-aeda-a306a2d729e2/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_f1c17bc4-c95d-444c-aeda-a306a2d729e2/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_f1c17bc4-c95d-444c-aeda-a306a2d729e2/bin-2019/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-crafted/RecursiveMultiplication_true-termination_true-valid-memsafety.c -s /tmp/vcloud-vcloud-master/worker/working_dir_f1c17bc4-c95d-444c-aeda-a306a2d729e2/bin-2019/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_f1c17bc4-c95d-444c-aeda-a306a2d729e2/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 3df7720ba3b76dcfdecddff77e2f89a40d99e447 .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-5842f4b [2018-11-18 08:34:29,064 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-18 08:34:29,065 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-18 08:34:29,071 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-18 08:34:29,072 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-18 08:34:29,072 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-18 08:34:29,073 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-18 08:34:29,074 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-18 08:34:29,076 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-18 08:34:29,076 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-18 08:34:29,077 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-18 08:34:29,077 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-18 08:34:29,078 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-18 08:34:29,079 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-18 08:34:29,080 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-18 08:34:29,080 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-18 08:34:29,081 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-18 08:34:29,082 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-18 08:34:29,084 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-18 08:34:29,085 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-18 08:34:29,086 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-18 08:34:29,087 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-18 08:34:29,088 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-18 08:34:29,089 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-18 08:34:29,089 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-18 08:34:29,090 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-18 08:34:29,090 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-18 08:34:29,091 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-18 08:34:29,092 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-18 08:34:29,092 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-18 08:34:29,093 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-18 08:34:29,093 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-18 08:34:29,093 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-18 08:34:29,093 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-18 08:34:29,094 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-18 08:34:29,095 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-18 08:34:29,095 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_f1c17bc4-c95d-444c-aeda-a306a2d729e2/bin-2019/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf [2018-11-18 08:34:29,105 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-18 08:34:29,105 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-18 08:34:29,106 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-18 08:34:29,107 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-18 08:34:29,107 INFO L133 SettingsManager]: * Use SBE=true [2018-11-18 08:34:29,107 INFO L131 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2018-11-18 08:34:29,107 INFO L133 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2018-11-18 08:34:29,107 INFO L133 SettingsManager]: * Use old map elimination=false [2018-11-18 08:34:29,107 INFO L133 SettingsManager]: * Use external solver (rank synthesis)=false [2018-11-18 08:34:29,107 INFO L133 SettingsManager]: * Use only trivial implications for array writes=true [2018-11-18 08:34:29,107 INFO L133 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2018-11-18 08:34:29,108 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-18 08:34:29,108 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-11-18 08:34:29,108 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-18 08:34:29,108 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-18 08:34:29,108 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2018-11-18 08:34:29,108 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2018-11-18 08:34:29,108 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2018-11-18 08:34:29,108 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-18 08:34:29,108 INFO L133 SettingsManager]: * Assume nondeterminstic values are in range=false [2018-11-18 08:34:29,108 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-18 08:34:29,108 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2018-11-18 08:34:29,109 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-18 08:34:29,109 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-18 08:34:29,109 INFO L133 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2018-11-18 08:34:29,109 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-18 08:34:29,109 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-18 08:34:29,109 INFO L133 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2018-11-18 08:34:29,110 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-11-18 08:34:29,110 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_f1c17bc4-c95d-444c-aeda-a306a2d729e2/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 -> 3df7720ba3b76dcfdecddff77e2f89a40d99e447 [2018-11-18 08:34:29,131 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-18 08:34:29,139 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-18 08:34:29,142 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-18 08:34:29,143 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-18 08:34:29,143 INFO L276 PluginConnector]: CDTParser initialized [2018-11-18 08:34:29,144 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_f1c17bc4-c95d-444c-aeda-a306a2d729e2/bin-2019/uautomizer/../../sv-benchmarks/c/termination-crafted/RecursiveMultiplication_true-termination_true-valid-memsafety.c [2018-11-18 08:34:29,180 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_f1c17bc4-c95d-444c-aeda-a306a2d729e2/bin-2019/uautomizer/data/6d1452fab/7bdbab15a77c4321a07f8050ede5c652/FLAG87235edab [2018-11-18 08:34:29,472 INFO L307 CDTParser]: Found 1 translation units. [2018-11-18 08:34:29,472 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_f1c17bc4-c95d-444c-aeda-a306a2d729e2/sv-benchmarks/c/termination-crafted/RecursiveMultiplication_true-termination_true-valid-memsafety.c [2018-11-18 08:34:29,476 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_f1c17bc4-c95d-444c-aeda-a306a2d729e2/bin-2019/uautomizer/data/6d1452fab/7bdbab15a77c4321a07f8050ede5c652/FLAG87235edab [2018-11-18 08:34:29,486 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_f1c17bc4-c95d-444c-aeda-a306a2d729e2/bin-2019/uautomizer/data/6d1452fab/7bdbab15a77c4321a07f8050ede5c652 [2018-11-18 08:34:29,488 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-18 08:34:29,489 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-18 08:34:29,490 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-18 08:34:29,490 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-18 08:34:29,493 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-18 08:34:29,494 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:34:29" (1/1) ... [2018-11-18 08:34:29,496 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@649eab1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:34:29, skipping insertion in model container [2018-11-18 08:34:29,496 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:34:29" (1/1) ... [2018-11-18 08:34:29,502 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-18 08:34:29,514 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-18 08:34:29,615 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 08:34:29,618 INFO L191 MainTranslator]: Completed pre-run [2018-11-18 08:34:29,627 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 08:34:29,635 INFO L195 MainTranslator]: Completed translation [2018-11-18 08:34:29,635 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:34:29 WrapperNode [2018-11-18 08:34:29,635 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-18 08:34:29,636 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-18 08:34:29,636 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-18 08:34:29,636 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-18 08:34:29,641 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:34:29" (1/1) ... [2018-11-18 08:34:29,644 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:34:29" (1/1) ... [2018-11-18 08:34:29,655 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-18 08:34:29,655 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-18 08:34:29,655 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-18 08:34:29,656 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-18 08:34:29,661 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:34:29" (1/1) ... [2018-11-18 08:34:29,661 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:34:29" (1/1) ... [2018-11-18 08:34:29,662 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:34:29" (1/1) ... [2018-11-18 08:34:29,662 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:34:29" (1/1) ... [2018-11-18 08:34:29,663 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:34:29" (1/1) ... [2018-11-18 08:34:29,664 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:34:29" (1/1) ... [2018-11-18 08:34:29,665 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:34:29" (1/1) ... [2018-11-18 08:34:29,666 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-18 08:34:29,666 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-18 08:34:29,666 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-18 08:34:29,666 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-18 08:34:29,667 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:34:29" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f1c17bc4-c95d-444c-aeda-a306a2d729e2/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 08:34:29,742 INFO L130 BoogieDeclarations]: Found specification of procedure mult [2018-11-18 08:34:29,742 INFO L138 BoogieDeclarations]: Found implementation of procedure mult [2018-11-18 08:34:29,742 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-18 08:34:29,742 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-18 08:34:29,861 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-18 08:34:29,861 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:34:29 BoogieIcfgContainer [2018-11-18 08:34:29,861 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-18 08:34:29,862 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2018-11-18 08:34:29,862 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2018-11-18 08:34:29,864 INFO L276 PluginConnector]: BuchiAutomizer initialized [2018-11-18 08:34:29,865 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-11-18 08:34:29,865 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 18.11 08:34:29" (1/3) ... [2018-11-18 08:34:29,866 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@70cc9236 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 18.11 08:34:29, skipping insertion in model container [2018-11-18 08:34:29,866 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-11-18 08:34:29,866 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:34:29" (2/3) ... [2018-11-18 08:34:29,866 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@70cc9236 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 18.11 08:34:29, skipping insertion in model container [2018-11-18 08:34:29,866 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-11-18 08:34:29,866 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:34:29" (3/3) ... [2018-11-18 08:34:29,868 INFO L375 chiAutomizerObserver]: Analyzing ICFG RecursiveMultiplication_true-termination_true-valid-memsafety.c [2018-11-18 08:34:29,905 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-18 08:34:29,905 INFO L374 BuchiCegarLoop]: Interprodecural is true [2018-11-18 08:34:29,906 INFO L375 BuchiCegarLoop]: Hoare is false [2018-11-18 08:34:29,906 INFO L376 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2018-11-18 08:34:29,906 INFO L377 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-18 08:34:29,906 INFO L378 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-18 08:34:29,906 INFO L379 BuchiCegarLoop]: Difference is false [2018-11-18 08:34:29,906 INFO L380 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-18 08:34:29,906 INFO L383 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2018-11-18 08:34:29,915 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 18 states. [2018-11-18 08:34:29,936 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2018-11-18 08:34:29,936 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-18 08:34:29,936 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-18 08:34:29,942 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1] [2018-11-18 08:34:29,942 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2018-11-18 08:34:29,942 INFO L442 BuchiCegarLoop]: ======== Iteration 1============ [2018-11-18 08:34:29,942 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 18 states. [2018-11-18 08:34:29,944 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2018-11-18 08:34:29,944 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-18 08:34:29,944 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-18 08:34:29,945 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1] [2018-11-18 08:34:29,945 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2018-11-18 08:34:29,951 INFO L794 eck$LassoCheckResult]: Stem: 14#ULTIMATE.startENTRYtrue assume { :begin_inline_ULTIMATE.init } true; 13#L-1true assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res;havoc main_#t~nondet2, main_#t~nondet3, main_#t~ret4, main_~m~0, main_~n~0, main_~res~0;main_~m~0 := main_#t~nondet2;havoc main_#t~nondet2;main_~n~0 := main_#t~nondet3;havoc main_#t~nondet3; 3#L26true assume !!(-65535 <= main_~m~0 && main_~m~0 <= 65535); 6#L27true assume !!(-65535 <= main_~n~0 && main_~n~0 <= 65535); 8#L28true call main_#t~ret4 := mult(main_~m~0, main_~n~0);< 4#multENTRYtrue [2018-11-18 08:34:29,951 INFO L796 eck$LassoCheckResult]: Loop: 4#multENTRYtrue ~n := #in~n;~m := #in~m; 11#L13true assume ~m < 0; 9#L14true call #t~ret0 := mult(~n, -~m);< 4#multENTRYtrue [2018-11-18 08:34:29,955 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 08:34:29,955 INFO L82 PathProgramCache]: Analyzing trace with hash 42056124, now seen corresponding path program 1 times [2018-11-18 08:34:29,956 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 08:34:29,957 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 08:34:29,988 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 08:34:29,988 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 08:34:29,988 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 08:34:30,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 08:34:30,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 08:34:30,025 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 08:34:30,025 INFO L82 PathProgramCache]: Analyzing trace with hash 29916, now seen corresponding path program 1 times [2018-11-18 08:34:30,025 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 08:34:30,026 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 08:34:30,026 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 08:34:30,026 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 08:34:30,027 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 08:34:30,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 08:34:30,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 08:34:30,036 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 08:34:30,036 INFO L82 PathProgramCache]: Analyzing trace with hash -1236460223, now seen corresponding path program 1 times [2018-11-18 08:34:30,036 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 08:34:30,036 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 08:34:30,037 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 08:34:30,037 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 08:34:30,037 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 08:34:30,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 08:34:30,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 08:34:30,192 INFO L216 LassoAnalysis]: Preferences: [2018-11-18 08:34:30,193 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-18 08:34:30,193 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-18 08:34:30,193 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-18 08:34:30,193 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-18 08:34:30,194 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 08:34:30,194 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-18 08:34:30,194 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-18 08:34:30,194 INFO L131 ssoRankerPreferences]: Filename of dumped script: RecursiveMultiplication_true-termination_true-valid-memsafety.c_Iteration1_Loop [2018-11-18 08:34:30,194 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-18 08:34:30,194 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-18 08:34:30,213 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 08:34:30,222 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 08:34:30,224 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 08:34:30,227 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 08:34:30,232 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 08:34:30,240 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 08:34:30,256 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 08:34:30,340 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-18 08:34:30,341 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f1c17bc4-c95d-444c-aeda-a306a2d729e2/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 08:34:30,349 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 08:34:30,349 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 08:34:30,366 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 08:34:30,366 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {mult_#t~ret1=0} Honda state: {mult_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f1c17bc4-c95d-444c-aeda-a306a2d729e2/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 08:34:30,382 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 08:34:30,383 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 08:34:30,388 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 08:34:30,389 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {mult_~n=0} Honda state: {mult_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f1c17bc4-c95d-444c-aeda-a306a2d729e2/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 08:34:30,405 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 08:34:30,405 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 08:34:30,407 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 08:34:30,407 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {mult_#res=0} Honda state: {mult_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f1c17bc4-c95d-444c-aeda-a306a2d729e2/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 08:34:30,423 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 08:34:30,423 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 08:34:30,425 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 08:34:30,426 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {mult_~m=0} Honda state: {mult_~m=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f1c17bc4-c95d-444c-aeda-a306a2d729e2/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 08:34:30,441 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 08:34:30,441 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 08:34:30,443 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 08:34:30,443 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {mult_#t~ret0=0} Honda state: {mult_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f1c17bc4-c95d-444c-aeda-a306a2d729e2/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 08:34:30,458 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 08:34:30,459 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 08:34:30,461 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 08:34:30,461 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {mult_#in~n=0} Honda state: {mult_#in~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f1c17bc4-c95d-444c-aeda-a306a2d729e2/bin-2019/uautomizer/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 08:34:30,477 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 08:34:30,477 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f1c17bc4-c95d-444c-aeda-a306a2d729e2/bin-2019/uautomizer/z3 Starting monitored process 9 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 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 08:34:30,496 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-18 08:34:30,496 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 08:34:30,518 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-18 08:34:30,519 INFO L216 LassoAnalysis]: Preferences: [2018-11-18 08:34:30,519 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-18 08:34:30,519 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-18 08:34:30,520 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-18 08:34:30,520 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-18 08:34:30,520 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 08:34:30,520 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-18 08:34:30,520 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-18 08:34:30,520 INFO L131 ssoRankerPreferences]: Filename of dumped script: RecursiveMultiplication_true-termination_true-valid-memsafety.c_Iteration1_Loop [2018-11-18 08:34:30,520 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-18 08:34:30,520 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-18 08:34:30,521 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 08:34:30,523 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 08:34:30,524 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 08:34:30,526 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 08:34:30,527 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 08:34:30,528 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 08:34:30,530 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 08:34:30,571 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-18 08:34:30,574 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-18 08:34:30,575 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 08:34:30,576 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 08:34:30,576 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 08:34:30,577 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 08:34:30,577 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 08:34:30,577 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 08:34:30,579 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 08:34:30,579 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 08:34:30,581 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-18 08:34:30,582 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 08:34:30,582 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 08:34:30,582 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 08:34:30,583 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 08:34:30,583 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 08:34:30,583 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 08:34:30,584 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 08:34:30,584 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 08:34:30,585 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-18 08:34:30,585 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 08:34:30,586 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 08:34:30,586 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 08:34:30,586 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 08:34:30,586 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 08:34:30,586 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 08:34:30,587 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 08:34:30,587 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 08:34:30,588 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-18 08:34:30,589 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 08:34:30,589 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 08:34:30,590 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 08:34:30,590 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 08:34:30,590 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 08:34:30,590 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 08:34:30,591 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 08:34:30,591 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 08:34:30,592 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-18 08:34:30,592 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 08:34:30,593 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 08:34:30,593 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 08:34:30,593 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 08:34:30,593 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 08:34:30,593 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 08:34:30,594 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 08:34:30,594 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 08:34:30,595 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-18 08:34:30,596 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 08:34:30,596 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 08:34:30,596 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 08:34:30,597 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 08:34:30,597 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 08:34:30,597 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 08:34:30,597 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 08:34:30,598 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 08:34:30,599 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-18 08:34:30,599 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 08:34:30,600 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 08:34:30,600 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 08:34:30,600 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 08:34:30,600 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 08:34:30,600 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 08:34:30,600 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 08:34:30,601 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 08:34:30,605 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-18 08:34:30,607 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2018-11-18 08:34:30,608 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2018-11-18 08:34:30,609 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-18 08:34:30,609 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-18 08:34:30,609 INFO L518 LassoAnalysis]: Proved termination. [2018-11-18 08:34:30,610 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(mult_#in~m) = -1*mult_#in~m Supporting invariants [] [2018-11-18 08:34:30,611 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-18 08:34:30,653 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 08:34:30,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 08:34:30,671 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 08:34:30,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 08:34:30,689 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 08:34:30,717 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 08:34:30,727 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2018-11-18 08:34:30,728 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 18 states. Second operand 4 states. [2018-11-18 08:34:30,806 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 18 states.. Second operand 4 states. Result 47 states and 60 transitions. Complement of second has 12 states. [2018-11-18 08:34:30,807 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2018-11-18 08:34:30,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2018-11-18 08:34:30,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 16 transitions. [2018-11-18 08:34:30,811 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 16 transitions. Stem has 5 letters. Loop has 3 letters. [2018-11-18 08:34:30,812 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 08:34:30,812 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 16 transitions. Stem has 8 letters. Loop has 3 letters. [2018-11-18 08:34:30,813 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 08:34:30,813 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 16 transitions. Stem has 5 letters. Loop has 6 letters. [2018-11-18 08:34:30,813 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 08:34:30,814 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 47 states and 60 transitions. [2018-11-18 08:34:30,817 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2018-11-18 08:34:30,821 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 47 states to 22 states and 25 transitions. [2018-11-18 08:34:30,822 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 15 [2018-11-18 08:34:30,822 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 17 [2018-11-18 08:34:30,823 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 25 transitions. [2018-11-18 08:34:30,823 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-18 08:34:30,823 INFO L705 BuchiCegarLoop]: Abstraction has 22 states and 25 transitions. [2018-11-18 08:34:30,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states and 25 transitions. [2018-11-18 08:34:30,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 15. [2018-11-18 08:34:30,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-11-18 08:34:30,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2018-11-18 08:34:30,849 INFO L728 BuchiCegarLoop]: Abstraction has 15 states and 18 transitions. [2018-11-18 08:34:30,849 INFO L608 BuchiCegarLoop]: Abstraction has 15 states and 18 transitions. [2018-11-18 08:34:30,849 INFO L442 BuchiCegarLoop]: ======== Iteration 2============ [2018-11-18 08:34:30,849 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 15 states and 18 transitions. [2018-11-18 08:34:30,849 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2018-11-18 08:34:30,850 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-18 08:34:30,850 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-18 08:34:30,850 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1] [2018-11-18 08:34:30,850 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2018-11-18 08:34:30,850 INFO L794 eck$LassoCheckResult]: Stem: 136#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 124#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res;havoc main_#t~nondet2, main_#t~nondet3, main_#t~ret4, main_~m~0, main_~n~0, main_~res~0;main_~m~0 := main_#t~nondet2;havoc main_#t~nondet2;main_~n~0 := main_#t~nondet3;havoc main_#t~nondet3; 125#L26 assume !!(-65535 <= main_~m~0 && main_~m~0 <= 65535); 132#L27 assume !!(-65535 <= main_~n~0 && main_~n~0 <= 65535); 127#L28 call main_#t~ret4 := mult(main_~m~0, main_~n~0);< 126#multENTRY ~n := #in~n;~m := #in~m; 129#L13 assume !(~m < 0); 133#L16 [2018-11-18 08:34:30,851 INFO L796 eck$LassoCheckResult]: Loop: 133#L16 assume !(0 == ~m); 135#L19 call #t~ret1 := mult(~n, ~m - 1);< 137#multENTRY ~n := #in~n;~m := #in~m; 138#L13 assume !(~m < 0); 133#L16 [2018-11-18 08:34:30,851 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 08:34:30,851 INFO L82 PathProgramCache]: Analyzing trace with hash 1761229506, now seen corresponding path program 1 times [2018-11-18 08:34:30,851 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 08:34:30,851 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 08:34:30,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 08:34:30,852 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 08:34:30,852 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 08:34:30,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 08:34:30,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 08:34:30,860 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 08:34:30,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1254111, now seen corresponding path program 1 times [2018-11-18 08:34:30,861 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 08:34:30,861 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 08:34:30,862 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 08:34:30,862 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 08:34:30,862 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 08:34:30,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 08:34:30,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 08:34:30,867 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 08:34:30,867 INFO L82 PathProgramCache]: Analyzing trace with hash -1744825056, now seen corresponding path program 1 times [2018-11-18 08:34:30,867 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 08:34:30,868 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 08:34:30,868 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 08:34:30,868 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 08:34:30,868 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 08:34:30,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 08:34:30,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 08:34:30,959 INFO L216 LassoAnalysis]: Preferences: [2018-11-18 08:34:30,959 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-18 08:34:30,959 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-18 08:34:30,959 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-18 08:34:30,959 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-18 08:34:30,959 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 08:34:30,959 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-18 08:34:30,959 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-18 08:34:30,960 INFO L131 ssoRankerPreferences]: Filename of dumped script: RecursiveMultiplication_true-termination_true-valid-memsafety.c_Iteration2_Loop [2018-11-18 08:34:30,960 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-18 08:34:30,960 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-18 08:34:30,961 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 08:34:30,963 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 08:34:30,964 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 08:34:30,966 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 08:34:30,970 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 08:34:31,023 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-18 08:34:31,023 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f1c17bc4-c95d-444c-aeda-a306a2d729e2/bin-2019/uautomizer/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 08:34:31,033 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 08:34:31,033 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 08:34:31,036 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 08:34:31,036 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {mult_#t~ret0=0} Honda state: {mult_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f1c17bc4-c95d-444c-aeda-a306a2d729e2/bin-2019/uautomizer/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 08:34:31,061 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 08:34:31,061 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 08:34:31,063 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 08:34:31,064 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {mult_#t~ret1=0} Honda state: {mult_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f1c17bc4-c95d-444c-aeda-a306a2d729e2/bin-2019/uautomizer/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 [2018-11-18 08:34:31,080 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 08:34:31,081 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 08:34:31,083 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 08:34:31,083 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {mult_#res=0} Honda state: {mult_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f1c17bc4-c95d-444c-aeda-a306a2d729e2/bin-2019/uautomizer/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 [2018-11-18 08:34:31,099 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 08:34:31,099 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 08:34:31,102 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 08:34:31,102 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {mult_~n=4, mult_#in~n=4} Honda state: {mult_~n=4, mult_#in~n=4} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f1c17bc4-c95d-444c-aeda-a306a2d729e2/bin-2019/uautomizer/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 [2018-11-18 08:34:31,127 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 08:34:31,127 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f1c17bc4-c95d-444c-aeda-a306a2d729e2/bin-2019/uautomizer/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 08:34:31,149 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-18 08:34:31,149 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 08:34:32,011 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-18 08:34:32,013 INFO L216 LassoAnalysis]: Preferences: [2018-11-18 08:34:32,013 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-18 08:34:32,013 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-18 08:34:32,013 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-18 08:34:32,013 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-18 08:34:32,013 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 08:34:32,014 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-18 08:34:32,014 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-18 08:34:32,014 INFO L131 ssoRankerPreferences]: Filename of dumped script: RecursiveMultiplication_true-termination_true-valid-memsafety.c_Iteration2_Loop [2018-11-18 08:34:32,014 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-18 08:34:32,014 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-18 08:34:32,015 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 08:34:32,029 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 08:34:32,031 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 08:34:32,032 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 08:34:32,033 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 08:34:32,068 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-18 08:34:32,068 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-18 08:34:32,068 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 08:34:32,069 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 08:34:32,069 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 08:34:32,069 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 08:34:32,069 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 08:34:32,069 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 08:34:32,070 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 08:34:32,070 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 08:34:32,075 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-18 08:34:32,077 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-11-18 08:34:32,078 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-11-18 08:34:32,078 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-18 08:34:32,078 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-18 08:34:32,078 INFO L518 LassoAnalysis]: Proved termination. [2018-11-18 08:34:32,079 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(mult_~m) = 1*mult_~m Supporting invariants [] [2018-11-18 08:34:32,079 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-18 08:34:32,086 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 08:34:32,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 08:34:32,093 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 08:34:32,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 08:34:32,105 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 08:34:32,122 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 08:34:32,123 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2018-11-18 08:34:32,123 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 15 states and 18 transitions. cyclomatic complexity: 5 Second operand 5 states. [2018-11-18 08:34:32,161 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 15 states and 18 transitions. cyclomatic complexity: 5. Second operand 5 states. Result 27 states and 32 transitions. Complement of second has 13 states. [2018-11-18 08:34:32,161 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 1 stem states 3 non-accepting loop states 1 accepting loop states [2018-11-18 08:34:32,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-11-18 08:34:32,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 14 transitions. [2018-11-18 08:34:32,163 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 14 transitions. Stem has 7 letters. Loop has 4 letters. [2018-11-18 08:34:32,163 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 08:34:32,163 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 14 transitions. Stem has 11 letters. Loop has 4 letters. [2018-11-18 08:34:32,163 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 08:34:32,163 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 14 transitions. Stem has 7 letters. Loop has 8 letters. [2018-11-18 08:34:32,163 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 08:34:32,163 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 27 states and 32 transitions. [2018-11-18 08:34:32,164 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2018-11-18 08:34:32,165 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 27 states to 26 states and 31 transitions. [2018-11-18 08:34:32,165 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 16 [2018-11-18 08:34:32,166 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 18 [2018-11-18 08:34:32,166 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 31 transitions. [2018-11-18 08:34:32,166 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-18 08:34:32,166 INFO L705 BuchiCegarLoop]: Abstraction has 26 states and 31 transitions. [2018-11-18 08:34:32,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states and 31 transitions. [2018-11-18 08:34:32,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2018-11-18 08:34:32,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-11-18 08:34:32,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2018-11-18 08:34:32,168 INFO L728 BuchiCegarLoop]: Abstraction has 23 states and 28 transitions. [2018-11-18 08:34:32,168 INFO L608 BuchiCegarLoop]: Abstraction has 23 states and 28 transitions. [2018-11-18 08:34:32,168 INFO L442 BuchiCegarLoop]: ======== Iteration 3============ [2018-11-18 08:34:32,168 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 23 states and 28 transitions. [2018-11-18 08:34:32,169 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2018-11-18 08:34:32,169 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-18 08:34:32,169 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-18 08:34:32,170 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 08:34:32,170 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2018-11-18 08:34:32,170 INFO L794 eck$LassoCheckResult]: Stem: 246#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 232#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res;havoc main_#t~nondet2, main_#t~nondet3, main_#t~ret4, main_~m~0, main_~n~0, main_~res~0;main_~m~0 := main_#t~nondet2;havoc main_#t~nondet2;main_~n~0 := main_#t~nondet3;havoc main_#t~nondet3; 233#L26 assume !!(-65535 <= main_~m~0 && main_~m~0 <= 65535); 241#L27 assume !!(-65535 <= main_~n~0 && main_~n~0 <= 65535); 243#L28 call main_#t~ret4 := mult(main_~m~0, main_~n~0);< 247#multENTRY ~n := #in~n;~m := #in~m; 240#L13 assume !(~m < 0); 242#L16 assume !(0 == ~m); 235#L19 call #t~ret1 := mult(~n, ~m - 1);< 234#multENTRY ~n := #in~n;~m := #in~m; 236#L13 assume ~m < 0; 248#L14 [2018-11-18 08:34:32,170 INFO L796 eck$LassoCheckResult]: Loop: 248#L14 call #t~ret0 := mult(~n, -~m);< 250#multENTRY ~n := #in~n;~m := #in~m; 253#L13 assume ~m < 0; 248#L14 [2018-11-18 08:34:32,170 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 08:34:32,170 INFO L82 PathProgramCache]: Analyzing trace with hash -1744825059, now seen corresponding path program 1 times [2018-11-18 08:34:32,170 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 08:34:32,170 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 08:34:32,171 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 08:34:32,171 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 08:34:32,171 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 08:34:32,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 08:34:32,214 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 08:34:32,215 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 08:34:32,215 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-11-18 08:34:32,217 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-11-18 08:34:32,217 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 08:34:32,217 INFO L82 PathProgramCache]: Analyzing trace with hash 60546, now seen corresponding path program 2 times [2018-11-18 08:34:32,217 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 08:34:32,217 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 08:34:32,218 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 08:34:32,218 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 08:34:32,218 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 08:34:32,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 08:34:32,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 08:34:32,267 INFO L216 LassoAnalysis]: Preferences: [2018-11-18 08:34:32,267 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-18 08:34:32,267 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-18 08:34:32,267 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-18 08:34:32,267 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-18 08:34:32,267 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 08:34:32,268 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-18 08:34:32,268 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-18 08:34:32,268 INFO L131 ssoRankerPreferences]: Filename of dumped script: RecursiveMultiplication_true-termination_true-valid-memsafety.c_Iteration3_Loop [2018-11-18 08:34:32,268 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-18 08:34:32,268 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-18 08:34:32,269 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 08:34:32,277 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 08:34:32,279 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 08:34:32,281 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 08:34:32,285 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 08:34:32,324 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-18 08:34:32,324 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f1c17bc4-c95d-444c-aeda-a306a2d729e2/bin-2019/uautomizer/z3 Starting monitored process 16 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 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 08:34:32,326 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 08:34:32,326 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f1c17bc4-c95d-444c-aeda-a306a2d729e2/bin-2019/uautomizer/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 08:34:32,345 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-18 08:34:32,345 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 08:34:33,279 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-18 08:34:33,280 INFO L216 LassoAnalysis]: Preferences: [2018-11-18 08:34:33,280 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-18 08:34:33,280 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-18 08:34:33,280 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-18 08:34:33,280 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-18 08:34:33,281 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 08:34:33,281 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-18 08:34:33,281 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-18 08:34:33,281 INFO L131 ssoRankerPreferences]: Filename of dumped script: RecursiveMultiplication_true-termination_true-valid-memsafety.c_Iteration3_Loop [2018-11-18 08:34:33,281 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-18 08:34:33,281 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-18 08:34:33,282 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 08:34:33,286 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 08:34:33,287 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 08:34:33,290 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 08:34:33,291 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 08:34:33,321 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-18 08:34:33,321 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-18 08:34:33,321 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 08:34:33,322 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 08:34:33,322 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 08:34:33,322 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 08:34:33,322 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 08:34:33,322 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 08:34:33,323 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 08:34:33,323 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 08:34:33,326 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-18 08:34:33,328 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2018-11-18 08:34:33,329 INFO L444 ModelExtractionUtils]: 2 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. [2018-11-18 08:34:33,329 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-18 08:34:33,329 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-18 08:34:33,337 INFO L518 LassoAnalysis]: Proved termination. [2018-11-18 08:34:33,338 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(mult_~m) = 1*mult_~m Supporting invariants [] [2018-11-18 08:34:33,338 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-18 08:34:33,353 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 08:34:33,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 08:34:33,364 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 08:34:33,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 08:34:33,373 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 08:34:33,391 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 08:34:33,391 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2018-11-18 08:34:33,391 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 23 states and 28 transitions. cyclomatic complexity: 8 Second operand 4 states. [2018-11-18 08:34:33,411 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 23 states and 28 transitions. cyclomatic complexity: 8. Second operand 4 states. Result 52 states and 62 transitions. Complement of second has 9 states. [2018-11-18 08:34:33,412 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2018-11-18 08:34:33,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2018-11-18 08:34:33,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 15 transitions. [2018-11-18 08:34:33,412 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 15 transitions. Stem has 11 letters. Loop has 3 letters. [2018-11-18 08:34:33,413 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 08:34:33,413 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 15 transitions. Stem has 14 letters. Loop has 3 letters. [2018-11-18 08:34:33,413 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 08:34:33,413 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 15 transitions. Stem has 11 letters. Loop has 6 letters. [2018-11-18 08:34:33,413 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 08:34:33,413 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 52 states and 62 transitions. [2018-11-18 08:34:33,415 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2018-11-18 08:34:33,416 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 52 states to 45 states and 55 transitions. [2018-11-18 08:34:33,416 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 26 [2018-11-18 08:34:33,417 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 28 [2018-11-18 08:34:33,417 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 55 transitions. [2018-11-18 08:34:33,417 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-18 08:34:33,417 INFO L705 BuchiCegarLoop]: Abstraction has 45 states and 55 transitions. [2018-11-18 08:34:33,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states and 55 transitions. [2018-11-18 08:34:33,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 39. [2018-11-18 08:34:33,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-11-18 08:34:33,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 48 transitions. [2018-11-18 08:34:33,420 INFO L728 BuchiCegarLoop]: Abstraction has 39 states and 48 transitions. [2018-11-18 08:34:33,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-18 08:34:33,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-11-18 08:34:33,422 INFO L87 Difference]: Start difference. First operand 39 states and 48 transitions. Second operand 5 states. [2018-11-18 08:34:33,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 08:34:33,442 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2018-11-18 08:34:33,442 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-18 08:34:33,442 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 32 states and 36 transitions. [2018-11-18 08:34:33,443 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2018-11-18 08:34:33,443 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 32 states to 0 states and 0 transitions. [2018-11-18 08:34:33,443 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2018-11-18 08:34:33,443 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2018-11-18 08:34:33,444 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2018-11-18 08:34:33,444 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2018-11-18 08:34:33,444 INFO L705 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-18 08:34:33,444 INFO L728 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-18 08:34:33,444 INFO L608 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-18 08:34:33,444 INFO L442 BuchiCegarLoop]: ======== Iteration 4============ [2018-11-18 08:34:33,444 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2018-11-18 08:34:33,444 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2018-11-18 08:34:33,444 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2018-11-18 08:34:33,450 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 18.11 08:34:33 BoogieIcfgContainer [2018-11-18 08:34:33,450 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2018-11-18 08:34:33,451 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-18 08:34:33,451 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-18 08:34:33,451 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-18 08:34:33,451 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:34:29" (3/4) ... [2018-11-18 08:34:33,453 INFO L147 WitnessPrinter]: No result that supports witness generation found [2018-11-18 08:34:33,454 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-18 08:34:33,454 INFO L168 Benchmark]: Toolchain (without parser) took 3965.78 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 133.2 MB). Free memory was 958.2 MB in the beginning and 1.1 GB in the end (delta: -144.6 MB). There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 08:34:33,455 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 1.0 GB. Free memory is still 985.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 08:34:33,455 INFO L168 Benchmark]: CACSL2BoogieTranslator took 145.53 ms. Allocated memory is still 1.0 GB. Free memory was 958.2 MB in the beginning and 947.4 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-18 08:34:33,455 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.49 ms. Allocated memory is still 1.0 GB. Free memory was 947.4 MB in the beginning and 944.7 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-18 08:34:33,456 INFO L168 Benchmark]: Boogie Preprocessor took 10.33 ms. Allocated memory is still 1.0 GB. Free memory is still 944.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 08:34:33,456 INFO L168 Benchmark]: RCFGBuilder took 195.44 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 133.2 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -171.5 MB). Peak memory consumption was 14.6 MB. Max. memory is 11.5 GB. [2018-11-18 08:34:33,457 INFO L168 Benchmark]: BuchiAutomizer took 3588.71 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 13.5 MB). Peak memory consumption was 13.5 MB. Max. memory is 11.5 GB. [2018-11-18 08:34:33,457 INFO L168 Benchmark]: Witness Printer took 3.03 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 08:34:33,459 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 1.0 GB. Free memory is still 985.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 145.53 ms. Allocated memory is still 1.0 GB. Free memory was 958.2 MB in the beginning and 947.4 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 19.49 ms. Allocated memory is still 1.0 GB. Free memory was 947.4 MB in the beginning and 944.7 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 10.33 ms. Allocated memory is still 1.0 GB. Free memory is still 944.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 195.44 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 133.2 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -171.5 MB). Peak memory consumption was 14.6 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 3588.71 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 13.5 MB). Peak memory consumption was 13.5 MB. Max. memory is 11.5 GB. * Witness Printer took 3.03 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 4 terminating modules (1 trivial, 3 deterministic, 0 nondeterministic). One deterministic module has affine ranking function -1 * \old(m) and consists of 4 locations. One deterministic module has affine ranking function m and consists of 5 locations. One deterministic module has affine ranking function m and consists of 4 locations. 1 modules have a trivial ranking function, the largest among these consists of 5 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 3.5s and 4 iterations. TraceHistogramMax:2. Analysis of lassos took 3.0s. Construction of modules took 0.0s. Büchi inclusion checks took 0.3s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 3. Automata minimization 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 16 StatesRemovedByMinimization, 3 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 23 states and ocurred in iteration 2. Nontrivial modules had stage [3, 0, 0, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 46 SDtfs, 50 SDslu, 15 SDs, 0 SdLazy, 70 SolverSat, 10 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT2 conc0 concLT0 SILN0 SILU0 SILI0 SILT1 lasso0 LassoPreprocessingBenchmarks: Lassos: inital17 mio100 ax100 hnf100 lsp71 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq171 hnf92 smp100 dnf100 smp100 tf110 neg100 sie106 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 6ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 10 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 3 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 1.9s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...