./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/termination-crafted/NestedRecursion_2b_true-no-overflow_false-termination_true-valid-memsafety.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 635dfa2a Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_5a7cdf7d-cda3-403d-84f6-cb3deb396cc8/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_5a7cdf7d-cda3-403d-84f6-cb3deb396cc8/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_5a7cdf7d-cda3-403d-84f6-cb3deb396cc8/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_5a7cdf7d-cda3-403d-84f6-cb3deb396cc8/bin-2019/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-crafted/NestedRecursion_2b_true-no-overflow_false-termination_true-valid-memsafety.c -s /tmp/vcloud-vcloud-master/worker/working_dir_5a7cdf7d-cda3-403d-84f6-cb3deb396cc8/bin-2019/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_5a7cdf7d-cda3-403d-84f6-cb3deb396cc8/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 1b7166d94206693c3f254a3c1de8d5825f8510fb ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(TERM) --- Real Ultimate output --- This is Ultimate 0.1.23-635dfa2 [2018-12-01 07:55:22,777 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-01 07:55:22,778 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-01 07:55:22,784 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-01 07:55:22,784 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-01 07:55:22,784 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-01 07:55:22,785 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-01 07:55:22,786 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-01 07:55:22,786 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-01 07:55:22,787 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-01 07:55:22,787 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-01 07:55:22,787 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-01 07:55:22,788 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-01 07:55:22,788 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-01 07:55:22,789 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-01 07:55:22,789 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-01 07:55:22,789 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-01 07:55:22,790 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-01 07:55:22,791 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-01 07:55:22,792 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-01 07:55:22,792 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-01 07:55:22,793 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-01 07:55:22,794 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-01 07:55:22,794 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-01 07:55:22,794 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-01 07:55:22,794 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-01 07:55:22,795 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-01 07:55:22,795 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-01 07:55:22,796 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-01 07:55:22,796 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-01 07:55:22,796 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-01 07:55:22,797 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-01 07:55:22,797 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-01 07:55:22,797 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-01 07:55:22,797 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-01 07:55:22,798 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-01 07:55:22,798 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_5a7cdf7d-cda3-403d-84f6-cb3deb396cc8/bin-2019/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf [2018-12-01 07:55:22,805 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-01 07:55:22,806 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-01 07:55:22,806 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-01 07:55:22,806 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-01 07:55:22,806 INFO L133 SettingsManager]: * Use SBE=true [2018-12-01 07:55:22,806 INFO L131 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2018-12-01 07:55:22,807 INFO L133 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2018-12-01 07:55:22,807 INFO L133 SettingsManager]: * Use old map elimination=false [2018-12-01 07:55:22,807 INFO L133 SettingsManager]: * Use external solver (rank synthesis)=false [2018-12-01 07:55:22,807 INFO L133 SettingsManager]: * Use only trivial implications for array writes=true [2018-12-01 07:55:22,807 INFO L133 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2018-12-01 07:55:22,807 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-01 07:55:22,807 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-12-01 07:55:22,807 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-01 07:55:22,807 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-01 07:55:22,807 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2018-12-01 07:55:22,807 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2018-12-01 07:55:22,808 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2018-12-01 07:55:22,808 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-01 07:55:22,808 INFO L133 SettingsManager]: * Assume nondeterminstic values are in range=false [2018-12-01 07:55:22,808 INFO L133 SettingsManager]: * Use constant arrays=true [2018-12-01 07:55:22,808 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2018-12-01 07:55:22,808 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-01 07:55:22,808 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-01 07:55:22,808 INFO L133 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2018-12-01 07:55:22,808 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-01 07:55:22,808 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-12-01 07:55:22,808 INFO L133 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2018-12-01 07:55:22,809 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-12-01 07:55:22,809 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_5a7cdf7d-cda3-403d-84f6-cb3deb396cc8/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 -> 1b7166d94206693c3f254a3c1de8d5825f8510fb [2018-12-01 07:55:22,826 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-01 07:55:22,835 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-01 07:55:22,838 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-01 07:55:22,839 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-01 07:55:22,839 INFO L276 PluginConnector]: CDTParser initialized [2018-12-01 07:55:22,840 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_5a7cdf7d-cda3-403d-84f6-cb3deb396cc8/bin-2019/uautomizer/../../sv-benchmarks/c/termination-crafted/NestedRecursion_2b_true-no-overflow_false-termination_true-valid-memsafety.c [2018-12-01 07:55:22,880 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_5a7cdf7d-cda3-403d-84f6-cb3deb396cc8/bin-2019/uautomizer/data/7521f5191/8b742b261caa45d4bd26a8bc96bc944e/FLAG7a84475fb [2018-12-01 07:55:23,296 INFO L307 CDTParser]: Found 1 translation units. [2018-12-01 07:55:23,296 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_5a7cdf7d-cda3-403d-84f6-cb3deb396cc8/sv-benchmarks/c/termination-crafted/NestedRecursion_2b_true-no-overflow_false-termination_true-valid-memsafety.c [2018-12-01 07:55:23,300 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_5a7cdf7d-cda3-403d-84f6-cb3deb396cc8/bin-2019/uautomizer/data/7521f5191/8b742b261caa45d4bd26a8bc96bc944e/FLAG7a84475fb [2018-12-01 07:55:23,308 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_5a7cdf7d-cda3-403d-84f6-cb3deb396cc8/bin-2019/uautomizer/data/7521f5191/8b742b261caa45d4bd26a8bc96bc944e [2018-12-01 07:55:23,310 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-01 07:55:23,311 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-01 07:55:23,311 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-01 07:55:23,312 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-01 07:55:23,314 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-01 07:55:23,314 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 07:55:23" (1/1) ... [2018-12-01 07:55:23,316 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1de664b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 07:55:23, skipping insertion in model container [2018-12-01 07:55:23,316 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 07:55:23" (1/1) ... [2018-12-01 07:55:23,320 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-01 07:55:23,328 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-01 07:55:23,404 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-01 07:55:23,406 INFO L191 MainTranslator]: Completed pre-run [2018-12-01 07:55:23,414 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-01 07:55:23,421 INFO L195 MainTranslator]: Completed translation [2018-12-01 07:55:23,422 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 07:55:23 WrapperNode [2018-12-01 07:55:23,422 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-01 07:55:23,422 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-01 07:55:23,422 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-01 07:55:23,422 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-01 07:55:23,428 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 07:55:23" (1/1) ... [2018-12-01 07:55:23,430 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 07:55:23" (1/1) ... [2018-12-01 07:55:23,440 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-01 07:55:23,440 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-01 07:55:23,440 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-01 07:55:23,440 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-01 07:55:23,445 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 07:55:23" (1/1) ... [2018-12-01 07:55:23,445 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 07:55:23" (1/1) ... [2018-12-01 07:55:23,446 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 07:55:23" (1/1) ... [2018-12-01 07:55:23,446 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 07:55:23" (1/1) ... [2018-12-01 07:55:23,447 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 07:55:23" (1/1) ... [2018-12-01 07:55:23,448 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 07:55:23" (1/1) ... [2018-12-01 07:55:23,448 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 07:55:23" (1/1) ... [2018-12-01 07:55:23,449 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-01 07:55:23,449 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-01 07:55:23,449 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-01 07:55:23,449 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-01 07:55:23,450 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 07:55:23" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5a7cdf7d-cda3-403d-84f6-cb3deb396cc8/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 [2018-12-01 07:55:23,510 INFO L130 BoogieDeclarations]: Found specification of procedure g [2018-12-01 07:55:23,511 INFO L138 BoogieDeclarations]: Found implementation of procedure g [2018-12-01 07:55:23,511 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-01 07:55:23,511 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-01 07:55:23,578 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-01 07:55:23,578 INFO L280 CfgBuilder]: Removed 4 assue(true) statements. [2018-12-01 07:55:23,579 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 07:55:23 BoogieIcfgContainer [2018-12-01 07:55:23,579 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-01 07:55:23,579 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2018-12-01 07:55:23,579 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2018-12-01 07:55:23,581 INFO L276 PluginConnector]: BuchiAutomizer initialized [2018-12-01 07:55:23,582 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-12-01 07:55:23,582 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 01.12 07:55:23" (1/3) ... [2018-12-01 07:55:23,582 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@2b5e1126 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 01.12 07:55:23, skipping insertion in model container [2018-12-01 07:55:23,582 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-12-01 07:55:23,583 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 07:55:23" (2/3) ... [2018-12-01 07:55:23,583 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@2b5e1126 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 01.12 07:55:23, skipping insertion in model container [2018-12-01 07:55:23,583 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-12-01 07:55:23,583 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 07:55:23" (3/3) ... [2018-12-01 07:55:23,584 INFO L375 chiAutomizerObserver]: Analyzing ICFG NestedRecursion_2b_true-no-overflow_false-termination_true-valid-memsafety.c [2018-12-01 07:55:23,616 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-12-01 07:55:23,616 INFO L374 BuchiCegarLoop]: Interprodecural is true [2018-12-01 07:55:23,616 INFO L375 BuchiCegarLoop]: Hoare is false [2018-12-01 07:55:23,616 INFO L376 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2018-12-01 07:55:23,616 INFO L377 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-01 07:55:23,616 INFO L378 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-01 07:55:23,617 INFO L379 BuchiCegarLoop]: Difference is false [2018-12-01 07:55:23,617 INFO L380 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-01 07:55:23,617 INFO L383 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2018-12-01 07:55:23,625 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 14 states. [2018-12-01 07:55:23,640 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2018-12-01 07:55:23,640 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-12-01 07:55:23,640 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-12-01 07:55:23,645 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2018-12-01 07:55:23,645 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2018-12-01 07:55:23,645 INFO L442 BuchiCegarLoop]: ======== Iteration 1============ [2018-12-01 07:55:23,645 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 14 states. [2018-12-01 07:55:23,646 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2018-12-01 07:55:23,646 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-12-01 07:55:23,646 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-12-01 07:55:23,647 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2018-12-01 07:55:23,647 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2018-12-01 07:55:23,651 INFO L794 eck$LassoCheckResult]: Stem: 10#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet2, main_#t~ret3, main_~x~0;main_~x~0 := main_#t~nondet2;havoc main_#t~nondet2; 7#L20true assume !(main_~x~0 < 0); 9#L21true call main_#t~ret3 := g(main_~x~0);< 11#gENTRYtrue [2018-12-01 07:55:23,651 INFO L796 eck$LassoCheckResult]: Loop: 11#gENTRYtrue ~x := #in~x; 3#L12true assume !(0 == ~x); 13#L15true call #t~ret0 := g(~x - 1);< 11#gENTRYtrue [2018-12-01 07:55:23,655 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 07:55:23,655 INFO L82 PathProgramCache]: Analyzing trace with hash 39891, now seen corresponding path program 1 times [2018-12-01 07:55:23,656 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 07:55:23,656 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 07:55:23,685 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 07:55:23,685 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 07:55:23,686 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 07:55:23,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-01 07:55:23,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-01 07:55:23,713 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 07:55:23,713 INFO L82 PathProgramCache]: Analyzing trace with hash 29936, now seen corresponding path program 1 times [2018-12-01 07:55:23,713 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 07:55:23,713 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 07:55:23,714 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 07:55:23,714 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 07:55:23,714 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 07:55:23,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-01 07:55:23,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-01 07:55:23,720 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 07:55:23,720 INFO L82 PathProgramCache]: Analyzing trace with hash 1188392926, now seen corresponding path program 1 times [2018-12-01 07:55:23,721 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 07:55:23,721 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 07:55:23,721 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 07:55:23,721 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 07:55:23,722 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 07:55:23,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-01 07:55:23,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-01 07:55:23,777 INFO L216 LassoAnalysis]: Preferences: [2018-12-01 07:55:23,778 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-12-01 07:55:23,778 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-12-01 07:55:23,778 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-12-01 07:55:23,778 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-12-01 07:55:23,778 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-01 07:55:23,778 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-12-01 07:55:23,778 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-12-01 07:55:23,779 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_2b_true-no-overflow_false-termination_true-valid-memsafety.c_Iteration1_Loop [2018-12-01 07:55:23,779 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-12-01 07:55:23,779 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-12-01 07:55:23,790 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-01 07:55:23,794 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-01 07:55:23,796 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-01 07:55:23,798 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-01 07:55:23,799 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-01 07:55:23,840 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-12-01 07:55:23,840 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5a7cdf7d-cda3-403d-84f6-cb3deb396cc8/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 [2018-12-01 07:55:23,843 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-01 07:55:23,843 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-01 07:55:23,848 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-01 07:55:23,848 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_~x=0} Honda state: {g_~x=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5a7cdf7d-cda3-403d-84f6-cb3deb396cc8/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 [2018-12-01 07:55:23,872 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-01 07:55:23,872 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-01 07:55:23,875 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-01 07:55:23,875 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#t~ret1=0} Honda state: {g_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5a7cdf7d-cda3-403d-84f6-cb3deb396cc8/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 [2018-12-01 07:55:23,892 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-01 07:55:23,892 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-01 07:55:23,894 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-01 07:55:23,894 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#res=0} Honda state: {g_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5a7cdf7d-cda3-403d-84f6-cb3deb396cc8/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 [2018-12-01 07:55:23,910 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-01 07:55:23,910 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-01 07:55:23,912 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-01 07:55:23,912 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#t~ret0=0} Honda state: {g_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5a7cdf7d-cda3-403d-84f6-cb3deb396cc8/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 [2018-12-01 07:55:23,927 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-01 07:55:23,927 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5a7cdf7d-cda3-403d-84f6-cb3deb396cc8/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 [2018-12-01 07:55:23,944 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-12-01 07:55:23,944 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-01 07:55:23,955 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-01 07:55:23,955 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#in~x=-1} Honda state: {g_#in~x=-1} Generalized eigenvectors: [{g_#in~x=0}, {g_#in~x=-1}, {g_#in~x=0}] Lambdas: [8, 1, 8] Nus: [0, 0] [2018-12-01 07:55:23,981 INFO L216 LassoAnalysis]: Preferences: [2018-12-01 07:55:23,982 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-12-01 07:55:23,982 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-12-01 07:55:23,982 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-12-01 07:55:23,982 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-12-01 07:55:23,982 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-01 07:55:23,982 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-12-01 07:55:23,982 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-12-01 07:55:23,982 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_2b_true-no-overflow_false-termination_true-valid-memsafety.c_Iteration1_Lasso [2018-12-01 07:55:23,982 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-12-01 07:55:23,982 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-12-01 07:55:23,983 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-01 07:55:23,984 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-01 07:55:23,985 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-01 07:55:23,987 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-01 07:55:23,988 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-01 07:55:23,989 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-01 07:55:23,990 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-01 07:55:23,995 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-01 07:55:23,996 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-01 07:55:23,997 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-01 07:55:24,040 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-12-01 07:55:24,040 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5a7cdf7d-cda3-403d-84f6-cb3deb396cc8/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 [2018-12-01 07:55:24,042 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-01 07:55:24,042 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-01 07:55:24,044 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-01 07:55:24,044 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_#res=0} Honda state: {ULTIMATE.start_main_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5a7cdf7d-cda3-403d-84f6-cb3deb396cc8/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 [2018-12-01 07:55:24,059 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-01 07:55:24,059 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-01 07:55:24,061 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-01 07:55:24,061 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#t~ret1=0} Honda state: {g_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5a7cdf7d-cda3-403d-84f6-cb3deb396cc8/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 [2018-12-01 07:55:24,076 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-01 07:55:24,076 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-01 07:55:24,078 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-01 07:55:24,078 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#res=0} Honda state: {g_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5a7cdf7d-cda3-403d-84f6-cb3deb396cc8/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 [2018-12-01 07:55:24,093 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-01 07:55:24,093 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-01 07:55:24,096 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-01 07:55:24,096 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#t~ret0=0} Honda state: {g_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5a7cdf7d-cda3-403d-84f6-cb3deb396cc8/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 [2018-12-01 07:55:24,118 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-01 07:55:24,119 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-01 07:55:24,120 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-01 07:55:24,121 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_#t~ret4=0} Honda state: {ULTIMATE.start_#t~ret4=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5a7cdf7d-cda3-403d-84f6-cb3deb396cc8/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 [2018-12-01 07:55:24,135 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-01 07:55:24,135 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-01 07:55:24,138 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-01 07:55:24,138 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_#t~nondet2=0} Honda state: {ULTIMATE.start_main_#t~nondet2=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5a7cdf7d-cda3-403d-84f6-cb3deb396cc8/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 [2018-12-01 07:55:24,154 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-01 07:55:24,154 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5a7cdf7d-cda3-403d-84f6-cb3deb396cc8/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 [2018-12-01 07:55:24,171 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-12-01 07:55:24,171 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-01 07:55:24,191 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-12-01 07:55:24,192 INFO L216 LassoAnalysis]: Preferences: [2018-12-01 07:55:24,192 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-12-01 07:55:24,193 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-12-01 07:55:24,193 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-12-01 07:55:24,193 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-12-01 07:55:24,193 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-01 07:55:24,193 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-12-01 07:55:24,193 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-12-01 07:55:24,193 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_2b_true-no-overflow_false-termination_true-valid-memsafety.c_Iteration1_Lasso [2018-12-01 07:55:24,193 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-12-01 07:55:24,193 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-12-01 07:55:24,194 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-01 07:55:24,195 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-01 07:55:24,196 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-01 07:55:24,197 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-01 07:55:24,198 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-01 07:55:24,199 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-01 07:55:24,200 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-01 07:55:24,201 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-01 07:55:24,202 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-01 07:55:24,203 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-01 07:55:24,246 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-12-01 07:55:24,250 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-12-01 07:55:24,251 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 [2018-12-01 07:55:24,252 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-01 07:55:24,252 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-01 07:55:24,252 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-01 07:55:24,252 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-01 07:55:24,253 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-01 07:55:24,254 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-01 07:55:24,254 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-01 07:55:24,256 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-01 07:55:24,257 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 [2018-12-01 07:55:24,257 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-01 07:55:24,257 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-01 07:55:24,257 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-01 07:55:24,258 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-01 07:55:24,258 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-01 07:55:24,258 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-01 07:55:24,258 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-01 07:55:24,259 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-01 07:55:24,260 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 [2018-12-01 07:55:24,260 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-01 07:55:24,260 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-01 07:55:24,261 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-01 07:55:24,261 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-01 07:55:24,261 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-01 07:55:24,261 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-01 07:55:24,262 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-01 07:55:24,262 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-01 07:55:24,263 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 [2018-12-01 07:55:24,263 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-01 07:55:24,263 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-01 07:55:24,264 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-01 07:55:24,264 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-01 07:55:24,264 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-01 07:55:24,264 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-01 07:55:24,264 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-01 07:55:24,266 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-01 07:55:24,266 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 [2018-12-01 07:55:24,266 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-01 07:55:24,267 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-01 07:55:24,267 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-01 07:55:24,267 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-01 07:55:24,267 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-01 07:55:24,267 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-01 07:55:24,268 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-01 07:55:24,269 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-01 07:55:24,269 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 [2018-12-01 07:55:24,269 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-01 07:55:24,270 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-01 07:55:24,270 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-01 07:55:24,270 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-01 07:55:24,270 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-01 07:55:24,270 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-01 07:55:24,271 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-01 07:55:24,271 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-01 07:55:24,272 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 [2018-12-01 07:55:24,272 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-01 07:55:24,272 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-01 07:55:24,272 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-01 07:55:24,273 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-01 07:55:24,273 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-01 07:55:24,273 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-01 07:55:24,273 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-01 07:55:24,274 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-01 07:55:24,274 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 [2018-12-01 07:55:24,275 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-01 07:55:24,275 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-01 07:55:24,275 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-01 07:55:24,275 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-01 07:55:24,275 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-01 07:55:24,276 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-01 07:55:24,276 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-01 07:55:24,277 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-01 07:55:24,277 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 [2018-12-01 07:55:24,278 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-01 07:55:24,278 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-01 07:55:24,278 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-01 07:55:24,278 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-01 07:55:24,278 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-01 07:55:24,279 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-01 07:55:24,279 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-01 07:55:24,280 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-01 07:55:24,280 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 [2018-12-01 07:55:24,281 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-01 07:55:24,281 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-01 07:55:24,281 INFO L206 nArgumentSynthesizer]: 2 loop disjuncts [2018-12-01 07:55:24,281 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-01 07:55:24,288 INFO L402 nArgumentSynthesizer]: We have 16 Motzkin's Theorem applications. [2018-12-01 07:55:24,288 INFO L403 nArgumentSynthesizer]: A total of 4 supporting invariants were added. [2018-12-01 07:55:24,340 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-12-01 07:55:24,358 INFO L443 ModelExtractionUtils]: Simplification made 7 calls to the SMT solver. [2018-12-01 07:55:24,358 INFO L444 ModelExtractionUtils]: 4 out of 11 variables were initially zero. Simplification set additionally 4 variables to zero. [2018-12-01 07:55:24,359 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-12-01 07:55:24,362 INFO L440 nArgumentSynthesizer]: Removed 3 redundant supporting invariants from a total of 4. [2018-12-01 07:55:24,362 INFO L518 LassoAnalysis]: Proved termination. [2018-12-01 07:55:24,362 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(g_#in~x) = 1*g_#in~x Supporting invariants [1*g_#in~x >= 0] [2018-12-01 07:55:24,364 INFO L297 tatePredicateManager]: 0 out of 1 supporting invariants were superfluous and have been removed [2018-12-01 07:55:24,396 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 07:55:24,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 07:55:24,407 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 07:55:24,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 07:55:24,425 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 07:55:24,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 07:55:24,454 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2018-12-01 07:55:24,455 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 14 states. Second operand 5 states. [2018-12-01 07:55:24,553 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 14 states.. Second operand 5 states. Result 35 states and 42 transitions. Complement of second has 13 states. [2018-12-01 07:55:24,553 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2018-12-01 07:55:24,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-12-01 07:55:24,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 11 transitions. [2018-12-01 07:55:24,556 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 11 transitions. Stem has 3 letters. Loop has 3 letters. [2018-12-01 07:55:24,557 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-01 07:55:24,557 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 11 transitions. Stem has 6 letters. Loop has 3 letters. [2018-12-01 07:55:24,557 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-01 07:55:24,557 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 11 transitions. Stem has 3 letters. Loop has 6 letters. [2018-12-01 07:55:24,557 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-01 07:55:24,558 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 35 states and 42 transitions. [2018-12-01 07:55:24,560 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2018-12-01 07:55:24,564 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 35 states to 19 states and 25 transitions. [2018-12-01 07:55:24,565 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 13 [2018-12-01 07:55:24,565 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 14 [2018-12-01 07:55:24,565 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 25 transitions. [2018-12-01 07:55:24,566 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-12-01 07:55:24,566 INFO L705 BuchiCegarLoop]: Abstraction has 19 states and 25 transitions. [2018-12-01 07:55:24,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states and 25 transitions. [2018-12-01 07:55:24,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2018-12-01 07:55:24,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-12-01 07:55:24,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2018-12-01 07:55:24,584 INFO L728 BuchiCegarLoop]: Abstraction has 17 states and 21 transitions. [2018-12-01 07:55:24,585 INFO L608 BuchiCegarLoop]: Abstraction has 17 states and 21 transitions. [2018-12-01 07:55:24,585 INFO L442 BuchiCegarLoop]: ======== Iteration 2============ [2018-12-01 07:55:24,585 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 17 states and 21 transitions. [2018-12-01 07:55:24,585 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2018-12-01 07:55:24,585 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-12-01 07:55:24,586 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-12-01 07:55:24,586 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 07:55:24,586 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1] [2018-12-01 07:55:24,587 INFO L794 eck$LassoCheckResult]: Stem: 120#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet2, main_#t~ret3, main_~x~0;main_~x~0 := main_#t~nondet2;havoc main_#t~nondet2; 121#L20 assume !(main_~x~0 < 0); 118#L21 call main_#t~ret3 := g(main_~x~0);< 119#gENTRY ~x := #in~x; 117#L12 assume !(0 == ~x); 115#L15 call #t~ret0 := g(~x - 1);< 122#gENTRY ~x := #in~x; 114#L12 assume 0 == ~x;#res := 1; 116#gFINAL assume true; 123#gEXIT >#22#return; 125#L15-1 [2018-12-01 07:55:24,587 INFO L796 eck$LassoCheckResult]: Loop: 125#L15-1 call #t~ret1 := g(1 + #t~ret0);< 126#gENTRY ~x := #in~x; 129#L12 assume !(0 == ~x); 124#L15 call #t~ret0 := g(~x - 1);< 126#gENTRY ~x := #in~x; 129#L12 assume 0 == ~x;#res := 1; 128#gFINAL assume true; 130#gEXIT >#22#return; 125#L15-1 [2018-12-01 07:55:24,587 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 07:55:24,587 INFO L82 PathProgramCache]: Analyzing trace with hash -54633169, now seen corresponding path program 1 times [2018-12-01 07:55:24,587 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 07:55:24,587 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 07:55:24,588 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 07:55:24,588 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 07:55:24,588 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 07:55:24,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-01 07:55:24,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-01 07:55:24,593 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 07:55:24,594 INFO L82 PathProgramCache]: Analyzing trace with hash -243608724, now seen corresponding path program 1 times [2018-12-01 07:55:24,594 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 07:55:24,594 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 07:55:24,594 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 07:55:24,594 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 07:55:24,595 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 07:55:24,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-01 07:55:24,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-01 07:55:24,599 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 07:55:24,599 INFO L82 PathProgramCache]: Analyzing trace with hash -791141734, now seen corresponding path program 1 times [2018-12-01 07:55:24,599 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 07:55:24,599 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 07:55:24,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 07:55:24,600 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 07:55:24,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 07:55:24,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 07:55:24,648 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-12-01 07:55:24,649 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 07:55:24,649 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5a7cdf7d-cda3-403d-84f6-cb3deb396cc8/bin-2019/uautomizer/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 07:55:24,655 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 07:55:24,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 07:55:24,661 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 07:55:24,669 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-12-01 07:55:24,683 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 07:55:24,683 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-12-01 07:55:24,742 INFO L216 LassoAnalysis]: Preferences: [2018-12-01 07:55:24,742 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-12-01 07:55:24,742 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-12-01 07:55:24,742 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-12-01 07:55:24,743 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-12-01 07:55:24,743 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-01 07:55:24,743 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-12-01 07:55:24,743 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-12-01 07:55:24,743 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_2b_true-no-overflow_false-termination_true-valid-memsafety.c_Iteration2_Loop [2018-12-01 07:55:24,743 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-12-01 07:55:24,743 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-12-01 07:55:24,744 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-01 07:55:24,749 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-01 07:55:24,750 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-01 07:55:24,779 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-12-01 07:55:24,779 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5a7cdf7d-cda3-403d-84f6-cb3deb396cc8/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 [2018-12-01 07:55:24,781 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-01 07:55:24,781 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5a7cdf7d-cda3-403d-84f6-cb3deb396cc8/bin-2019/uautomizer/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-01 07:55:24,797 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-12-01 07:55:24,797 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-01 07:55:25,695 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-12-01 07:55:25,697 INFO L216 LassoAnalysis]: Preferences: [2018-12-01 07:55:25,697 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-12-01 07:55:25,697 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-12-01 07:55:25,697 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-12-01 07:55:25,697 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-12-01 07:55:25,697 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-01 07:55:25,697 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-12-01 07:55:25,698 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-12-01 07:55:25,698 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_2b_true-no-overflow_false-termination_true-valid-memsafety.c_Iteration2_Loop [2018-12-01 07:55:25,698 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-12-01 07:55:25,698 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-12-01 07:55:25,698 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-01 07:55:25,700 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-01 07:55:25,711 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-01 07:55:25,738 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-12-01 07:55:25,739 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-12-01 07:55:25,739 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 [2018-12-01 07:55:25,740 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-01 07:55:25,740 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-01 07:55:25,740 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-01 07:55:25,740 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-01 07:55:25,740 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-01 07:55:25,741 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-01 07:55:25,741 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-01 07:55:25,742 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-01 07:55:25,742 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 [2018-12-01 07:55:25,742 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-01 07:55:25,743 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-01 07:55:25,743 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-01 07:55:25,743 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-01 07:55:25,743 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-01 07:55:25,744 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-01 07:55:25,744 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-01 07:55:25,747 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-12-01 07:55:25,749 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-12-01 07:55:25,749 INFO L444 ModelExtractionUtils]: 2 out of 5 variables were initially zero. Simplification set additionally 0 variables to zero. [2018-12-01 07:55:25,749 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-12-01 07:55:25,750 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-12-01 07:55:25,750 INFO L518 LassoAnalysis]: Proved termination. [2018-12-01 07:55:25,750 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(g_#t~ret0) = -2*g_#t~ret0 + 1 Supporting invariants [] [2018-12-01 07:55:25,750 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-12-01 07:55:25,764 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 07:55:25,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 07:55:25,773 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 07:55:25,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 07:55:25,808 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 07:55:25,857 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 07:55:25,857 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 6 loop predicates [2018-12-01 07:55:25,857 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 17 states and 21 transitions. cyclomatic complexity: 6 Second operand 8 states. [2018-12-01 07:55:26,026 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 17 states and 21 transitions. cyclomatic complexity: 6. Second operand 8 states. Result 82 states and 120 transitions. Complement of second has 31 states. [2018-12-01 07:55:26,027 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 10 states 2 stem states 7 non-accepting loop states 1 accepting loop states [2018-12-01 07:55:26,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-12-01 07:55:26,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 36 transitions. [2018-12-01 07:55:26,028 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 36 transitions. Stem has 10 letters. Loop has 8 letters. [2018-12-01 07:55:26,029 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-01 07:55:26,029 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 36 transitions. Stem has 18 letters. Loop has 8 letters. [2018-12-01 07:55:26,029 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-01 07:55:26,029 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 36 transitions. Stem has 10 letters. Loop has 16 letters. [2018-12-01 07:55:26,029 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-01 07:55:26,029 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 82 states and 120 transitions. [2018-12-01 07:55:26,032 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 8 [2018-12-01 07:55:26,034 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 82 states to 58 states and 81 transitions. [2018-12-01 07:55:26,034 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 44 [2018-12-01 07:55:26,035 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 45 [2018-12-01 07:55:26,035 INFO L73 IsDeterministic]: Start isDeterministic. Operand 58 states and 81 transitions. [2018-12-01 07:55:26,035 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-12-01 07:55:26,035 INFO L705 BuchiCegarLoop]: Abstraction has 58 states and 81 transitions. [2018-12-01 07:55:26,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states and 81 transitions. [2018-12-01 07:55:26,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 52. [2018-12-01 07:55:26,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-12-01 07:55:26,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 71 transitions. [2018-12-01 07:55:26,040 INFO L728 BuchiCegarLoop]: Abstraction has 52 states and 71 transitions. [2018-12-01 07:55:26,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-01 07:55:26,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-12-01 07:55:26,042 INFO L87 Difference]: Start difference. First operand 52 states and 71 transitions. Second operand 8 states. [2018-12-01 07:55:26,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 07:55:26,092 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2018-12-01 07:55:26,092 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-01 07:55:26,092 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 39 states and 44 transitions. [2018-12-01 07:55:26,093 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2018-12-01 07:55:26,094 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 39 states to 30 states and 34 transitions. [2018-12-01 07:55:26,094 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 25 [2018-12-01 07:55:26,094 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 25 [2018-12-01 07:55:26,094 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 34 transitions. [2018-12-01 07:55:26,095 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-12-01 07:55:26,095 INFO L705 BuchiCegarLoop]: Abstraction has 30 states and 34 transitions. [2018-12-01 07:55:26,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states and 34 transitions. [2018-12-01 07:55:26,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 25. [2018-12-01 07:55:26,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-12-01 07:55:26,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2018-12-01 07:55:26,096 INFO L728 BuchiCegarLoop]: Abstraction has 25 states and 27 transitions. [2018-12-01 07:55:26,096 INFO L608 BuchiCegarLoop]: Abstraction has 25 states and 27 transitions. [2018-12-01 07:55:26,097 INFO L442 BuchiCegarLoop]: ======== Iteration 3============ [2018-12-01 07:55:26,097 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 25 states and 27 transitions. [2018-12-01 07:55:26,097 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2018-12-01 07:55:26,097 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-12-01 07:55:26,097 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-12-01 07:55:26,098 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 07:55:26,098 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2018-12-01 07:55:26,098 INFO L794 eck$LassoCheckResult]: Stem: 492#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet2, main_#t~ret3, main_~x~0;main_~x~0 := main_#t~nondet2;havoc main_#t~nondet2; 493#L20 assume !(main_~x~0 < 0); 490#L21 call main_#t~ret3 := g(main_~x~0);< 491#gENTRY ~x := #in~x; 488#L12 assume !(0 == ~x); 489#L15 call #t~ret0 := g(~x - 1);< 497#gENTRY ~x := #in~x; 498#L12 assume 0 == ~x;#res := 1; 506#gFINAL assume true; 504#gEXIT >#22#return; 486#L15-1 call #t~ret1 := g(1 + #t~ret0);< 509#gENTRY ~x := #in~x; 485#L12 assume !(0 == ~x); 487#L15 call #t~ret0 := g(~x - 1);< 503#gENTRY ~x := #in~x; 507#L12 assume !(0 == ~x); 500#L15 [2018-12-01 07:55:26,098 INFO L796 eck$LassoCheckResult]: Loop: 500#L15 call #t~ret0 := g(~x - 1);< 505#gENTRY ~x := #in~x; 508#L12 assume !(0 == ~x); 500#L15 [2018-12-01 07:55:26,098 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 07:55:26,098 INFO L82 PathProgramCache]: Analyzing trace with hash 2001409165, now seen corresponding path program 2 times [2018-12-01 07:55:26,098 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 07:55:26,098 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 07:55:26,099 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 07:55:26,099 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 07:55:26,099 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 07:55:26,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-01 07:55:26,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-01 07:55:26,105 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 07:55:26,105 INFO L82 PathProgramCache]: Analyzing trace with hash 49976, now seen corresponding path program 2 times [2018-12-01 07:55:26,105 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 07:55:26,106 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 07:55:26,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 07:55:26,106 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 07:55:26,106 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 07:55:26,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-01 07:55:26,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-01 07:55:26,108 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 07:55:26,108 INFO L82 PathProgramCache]: Analyzing trace with hash 1244451628, now seen corresponding path program 3 times [2018-12-01 07:55:26,109 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 07:55:26,109 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 07:55:26,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 07:55:26,109 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 07:55:26,109 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 07:55:26,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 07:55:26,170 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-01 07:55:26,170 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 07:55:26,170 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5a7cdf7d-cda3-403d-84f6-cb3deb396cc8/bin-2019/uautomizer/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 07:55:26,178 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-01 07:55:26,185 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-12-01 07:55:26,185 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 07:55:26,186 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 07:55:26,198 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-01 07:55:26,212 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 07:55:26,212 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-12-01 07:55:26,234 INFO L216 LassoAnalysis]: Preferences: [2018-12-01 07:55:26,234 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-12-01 07:55:26,234 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-12-01 07:55:26,234 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-12-01 07:55:26,235 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-12-01 07:55:26,235 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-01 07:55:26,235 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-12-01 07:55:26,235 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-12-01 07:55:26,235 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_2b_true-no-overflow_false-termination_true-valid-memsafety.c_Iteration3_Loop [2018-12-01 07:55:26,235 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-12-01 07:55:26,235 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-12-01 07:55:26,236 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-01 07:55:26,240 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-01 07:55:26,241 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-01 07:55:26,241 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-01 07:55:26,268 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-12-01 07:55:26,268 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5a7cdf7d-cda3-403d-84f6-cb3deb396cc8/bin-2019/uautomizer/z3 Starting monitored process 20 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 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-01 07:55:26,270 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-01 07:55:26,270 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5a7cdf7d-cda3-403d-84f6-cb3deb396cc8/bin-2019/uautomizer/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-01 07:55:26,288 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-12-01 07:55:26,288 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-01 07:55:26,410 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-01 07:55:26,410 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#in~x=-8, g_~x=-8} Honda state: {g_#in~x=-8, g_~x=-8} Generalized eigenvectors: [{g_#in~x=0, g_~x=0}, {g_#in~x=-1, g_~x=-1}, {g_#in~x=0, g_~x=0}] Lambdas: [8, 1, 3] Nus: [0, 0] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5a7cdf7d-cda3-403d-84f6-cb3deb396cc8/bin-2019/uautomizer/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-01 07:55:26,425 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-01 07:55:26,425 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-01 07:55:26,427 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-01 07:55:26,427 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#t~ret1=0} Honda state: {g_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5a7cdf7d-cda3-403d-84f6-cb3deb396cc8/bin-2019/uautomizer/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-01 07:55:26,442 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-01 07:55:26,442 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-01 07:55:26,444 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-01 07:55:26,444 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#res=0} Honda state: {g_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5a7cdf7d-cda3-403d-84f6-cb3deb396cc8/bin-2019/uautomizer/z3 Starting monitored process 24 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 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-01 07:55:26,459 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-01 07:55:26,459 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-01 07:55:26,461 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-01 07:55:26,461 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#t~ret0=0} Honda state: {g_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2018-12-01 07:55:26,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-12-01 07:55:26,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-12-01 07:55:26,475 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. cyclomatic complexity: 4 Second operand 10 states. [2018-12-01 07:55:26,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 07:55:26,571 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2018-12-01 07:55:26,571 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-12-01 07:55:26,571 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 27 states and 28 transitions. [2018-12-01 07:55:26,572 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2018-12-01 07:55:26,572 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 27 states to 27 states and 28 transitions. [2018-12-01 07:55:26,572 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 24 [2018-12-01 07:55:26,572 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 24 [2018-12-01 07:55:26,572 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 28 transitions. [2018-12-01 07:55:26,573 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-12-01 07:55:26,573 INFO L705 BuchiCegarLoop]: Abstraction has 27 states and 28 transitions. [2018-12-01 07:55:26,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states and 28 transitions. [2018-12-01 07:55:26,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 21. [2018-12-01 07:55:26,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-12-01 07:55:26,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2018-12-01 07:55:26,574 INFO L728 BuchiCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-12-01 07:55:26,574 INFO L608 BuchiCegarLoop]: Abstraction has 21 states and 22 transitions. [2018-12-01 07:55:26,574 INFO L442 BuchiCegarLoop]: ======== Iteration 4============ [2018-12-01 07:55:26,574 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 21 states and 22 transitions. [2018-12-01 07:55:26,574 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2018-12-01 07:55:26,574 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-12-01 07:55:26,574 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-12-01 07:55:26,575 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 07:55:26,575 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [3, 2, 2, 1, 1, 1, 1] [2018-12-01 07:55:26,575 INFO L794 eck$LassoCheckResult]: Stem: 625#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet2, main_#t~ret3, main_~x~0;main_~x~0 := main_#t~nondet2;havoc main_#t~nondet2; 626#L20 assume !(main_~x~0 < 0); 618#L21 call main_#t~ret3 := g(main_~x~0);< 619#gENTRY ~x := #in~x; 623#L12 assume !(0 == ~x); 624#L15 call #t~ret0 := g(~x - 1);< 628#gENTRY ~x := #in~x; 629#L12 assume 0 == ~x;#res := 1; 636#gFINAL assume true; 634#gEXIT >#22#return; 621#L15-1 [2018-12-01 07:55:26,575 INFO L796 eck$LassoCheckResult]: Loop: 621#L15-1 call #t~ret1 := g(1 + #t~ret0);< 627#gENTRY ~x := #in~x; 620#L12 assume !(0 == ~x); 622#L15 call #t~ret0 := g(~x - 1);< 633#gENTRY ~x := #in~x; 637#L12 assume !(0 == ~x); 631#L15 call #t~ret0 := g(~x - 1);< 635#gENTRY ~x := #in~x; 638#L12 assume 0 == ~x;#res := 1; 630#gFINAL assume true; 632#gEXIT >#22#return; 621#L15-1 [2018-12-01 07:55:26,575 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 07:55:26,575 INFO L82 PathProgramCache]: Analyzing trace with hash -54633169, now seen corresponding path program 2 times [2018-12-01 07:55:26,575 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 07:55:26,575 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 07:55:26,575 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 07:55:26,576 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 07:55:26,576 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 07:55:26,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-01 07:55:26,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-01 07:55:26,579 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 07:55:26,579 INFO L82 PathProgramCache]: Analyzing trace with hash 1187216231, now seen corresponding path program 2 times [2018-12-01 07:55:26,579 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 07:55:26,580 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 07:55:26,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 07:55:26,580 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 07:55:26,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 07:55:26,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-01 07:55:26,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-01 07:55:26,584 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 07:55:26,584 INFO L82 PathProgramCache]: Analyzing trace with hash 1917105529, now seen corresponding path program 4 times [2018-12-01 07:55:26,584 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 07:55:26,584 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 07:55:26,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 07:55:26,585 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 07:55:26,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 07:55:26,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-01 07:55:26,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-01 07:55:26,711 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 01.12 07:55:26 BoogieIcfgContainer [2018-12-01 07:55:26,711 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2018-12-01 07:55:26,711 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-01 07:55:26,711 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-01 07:55:26,712 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-01 07:55:26,712 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 07:55:23" (3/4) ... [2018-12-01 07:55:26,714 INFO L141 WitnessPrinter]: Generating witness for non-termination counterexample [2018-12-01 07:55:26,737 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_5a7cdf7d-cda3-403d-84f6-cb3deb396cc8/bin-2019/uautomizer/witness.graphml [2018-12-01 07:55:26,737 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-01 07:55:26,737 INFO L168 Benchmark]: Toolchain (without parser) took 3426.93 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 101.7 MB). Free memory was 957.1 MB in the beginning and 904.4 MB in the end (delta: 52.7 MB). Peak memory consumption was 154.4 MB. Max. memory is 11.5 GB. [2018-12-01 07:55:26,738 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 976.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-01 07:55:26,739 INFO L168 Benchmark]: CACSL2BoogieTranslator took 110.62 ms. Allocated memory is still 1.0 GB. Free memory was 957.1 MB in the beginning and 946.3 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-12-01 07:55:26,739 INFO L168 Benchmark]: Boogie Procedure Inliner took 17.42 ms. Allocated memory is still 1.0 GB. Free memory is still 946.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-01 07:55:26,739 INFO L168 Benchmark]: Boogie Preprocessor took 9.09 ms. Allocated memory is still 1.0 GB. Free memory is still 946.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-01 07:55:26,739 INFO L168 Benchmark]: RCFGBuilder took 129.55 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 101.7 MB). Free memory was 946.3 MB in the beginning and 1.1 GB in the end (delta: -141.6 MB). Peak memory consumption was 18.7 MB. Max. memory is 11.5 GB. [2018-12-01 07:55:26,740 INFO L168 Benchmark]: BuchiAutomizer took 3132.14 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 904.4 MB in the end (delta: 183.6 MB). Peak memory consumption was 183.6 MB. Max. memory is 11.5 GB. [2018-12-01 07:55:26,740 INFO L168 Benchmark]: Witness Printer took 25.50 ms. Allocated memory is still 1.1 GB. Free memory is still 904.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-01 07:55:26,741 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 976.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 110.62 ms. Allocated memory is still 1.0 GB. Free memory was 957.1 MB in the beginning and 946.3 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 17.42 ms. Allocated memory is still 1.0 GB. Free memory is still 946.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 9.09 ms. Allocated memory is still 1.0 GB. Free memory is still 946.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 129.55 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 101.7 MB). Free memory was 946.3 MB in the beginning and 1.1 GB in the end (delta: -141.6 MB). Peak memory consumption was 18.7 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 3132.14 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 904.4 MB in the end (delta: 183.6 MB). Peak memory consumption was 183.6 MB. Max. memory is 11.5 GB. * Witness Printer took 25.50 ms. Allocated memory is still 1.1 GB. Free memory is still 904.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 4 terminating modules (2 trivial, 2 deterministic, 0 nondeterministic) and one nonterminating remainder module.One deterministic module has affine ranking function \old(x) and consists of 5 locations. One deterministic module has affine ranking function -2 * aux-g(x - 1)-aux + 1 and consists of 10 locations. 2 modules have a trivial ranking function, the largest among these consists of 10 locations. The remainder module has 21 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 3.0s and 4 iterations. TraceHistogramMax:4. Analysis of lassos took 2.3s. Construction of modules took 0.1s. Büchi inclusion checks took 0.4s. Highest rank in rank-based complementation 3. Minimization of det autom 0. Minimization of nondet autom 4. Automata minimization 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 19 StatesRemovedByMinimization, 4 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 25 states and ocurred in iteration 2. Nontrivial modules had stage [2, 0, 0, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/2 HoareTripleCheckerStatistics: 46 SDtfs, 67 SDslu, 97 SDs, 0 SdLazy, 225 SolverSat, 47 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time LassoAnalysisResults: nont1 unkn0 SFLI0 SFLT0 conc1 concLT1 SILN0 SILU0 SILI0 SILT0 lasso1 LassoPreprocessingBenchmarks: Lassos: inital13 mio100 ax100 hnf100 lsp100 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq194 hnf92 smp100 dnf139 smp100 tf104 neg96 sie107 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: sat Degree: 0 Time: 81ms VariablesStem: 1 VariablesLoop: 2 DisjunctsStem: 1 DisjunctsLoop: 2 SupportingInvariants: 4 MotzkinApplications: 16 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 13 LassoNonterminationAnalysisSatUnbounded: 2 LassoNonterminationAnalysisUnsat: 2 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 1.1s - TerminationAnalysisResult: Nontermination possible Buchi Automizer proved that your program is nonterminating for some inputs - FixpointNonTerminationResult [Line: 15]: Nontermination argument in form of an infinite program execution. Nontermination argument in form of an infinite execution State at position 0 is {} State at position 1 is {org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@32885bf8=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@420e46b6=1, \result=0, \result=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@753adc1a=0, \old(x)=1, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@5804a39b=0, x=0, x=1, NULL=0} - StatisticsResult: NonterminationArgumentStatistics Fixpoint - NonterminatingLassoResult [Line: 15]: Nonterminating execution Found a nonterminating execution for the following lasso shaped sequence of statements. Stem: [L19] int x = __VERIFIER_nondet_int(); [L20] COND FALSE !(x < 0) [L21] CALL g(x) [L12] COND FALSE !(x == 0) [L15] CALL g(x - 1) [L12] COND TRUE x == 0 [L13] return 1; [L15] RET g(x - 1) Loop: [L15] CALL g(g(x - 1) + 1) [L12] COND FALSE !(x == 0) [L15] CALL g(x - 1) [L12] COND FALSE !(x == 0) [L15] CALL g(x - 1) [L12] COND TRUE x == 0 [L13] return 1; [L15] RET g(x - 1) End of lasso representation. RESULT: Ultimate proved your program to be incorrect! Received shutdown request...