./Ultimate.py --spec ../../sv-benchmarks/c/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 1dbac8bc Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_97fcdc10-d2aa-4d82-a03b-8dfe885ae744/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_97fcdc10-d2aa-4d82-a03b-8dfe885ae744/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_97fcdc10-d2aa-4d82-a03b-8dfe885ae744/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_97fcdc10-d2aa-4d82-a03b-8dfe885ae744/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_97fcdc10-d2aa-4d82-a03b-8dfe885ae744/bin-2019/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_97fcdc10-d2aa-4d82-a03b-8dfe885ae744/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 0.1.23-1dbac8b [2018-11-10 05:14:05,559 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-10 05:14:05,561 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-10 05:14:05,568 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-10 05:14:05,569 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-10 05:14:05,569 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-10 05:14:05,571 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-10 05:14:05,572 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-10 05:14:05,573 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-10 05:14:05,574 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-10 05:14:05,575 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-10 05:14:05,575 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-10 05:14:05,576 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-10 05:14:05,577 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-10 05:14:05,577 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-10 05:14:05,578 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-10 05:14:05,578 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-10 05:14:05,579 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-10 05:14:05,581 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-10 05:14:05,582 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-10 05:14:05,583 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-10 05:14:05,584 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-10 05:14:05,586 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-10 05:14:05,586 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-10 05:14:05,587 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-10 05:14:05,587 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-10 05:14:05,588 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-10 05:14:05,588 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-10 05:14:05,589 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-10 05:14:05,589 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-10 05:14:05,589 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-10 05:14:05,590 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-10 05:14:05,590 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-10 05:14:05,590 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-10 05:14:05,591 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-10 05:14:05,591 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-10 05:14:05,591 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_97fcdc10-d2aa-4d82-a03b-8dfe885ae744/bin-2019/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf [2018-11-10 05:14:05,603 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-10 05:14:05,604 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-10 05:14:05,605 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-10 05:14:05,605 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-10 05:14:05,605 INFO L133 SettingsManager]: * Use SBE=true [2018-11-10 05:14:05,606 INFO L131 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2018-11-10 05:14:05,606 INFO L133 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2018-11-10 05:14:05,606 INFO L133 SettingsManager]: * Use old map elimination=false [2018-11-10 05:14:05,606 INFO L133 SettingsManager]: * Use external solver (rank synthesis)=false [2018-11-10 05:14:05,606 INFO L133 SettingsManager]: * Use only trivial implications for array writes=true [2018-11-10 05:14:05,606 INFO L133 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2018-11-10 05:14:05,607 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-10 05:14:05,607 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-11-10 05:14:05,607 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-10 05:14:05,607 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-10 05:14:05,607 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2018-11-10 05:14:05,607 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2018-11-10 05:14:05,608 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2018-11-10 05:14:05,608 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-10 05:14:05,608 INFO L133 SettingsManager]: * Assume nondeterminstic values are in range=false [2018-11-10 05:14:05,608 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2018-11-10 05:14:05,608 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-10 05:14:05,610 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-10 05:14:05,611 INFO L133 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2018-11-10 05:14:05,611 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-10 05:14:05,611 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-10 05:14:05,611 INFO L133 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2018-11-10 05:14:05,612 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-11-10 05:14:05,612 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_97fcdc10-d2aa-4d82-a03b-8dfe885ae744/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 [2018-11-10 05:14:05,640 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-10 05:14:05,651 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-10 05:14:05,654 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-10 05:14:05,656 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-10 05:14:05,656 INFO L276 PluginConnector]: CDTParser initialized [2018-11-10 05:14:05,657 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_97fcdc10-d2aa-4d82-a03b-8dfe885ae744/bin-2019/uautomizer/../../sv-benchmarks/c/termination-crafted/NestedRecursion_2b_true-no-overflow_false-termination_true-valid-memsafety.c [2018-11-10 05:14:05,710 INFO L218 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_97fcdc10-d2aa-4d82-a03b-8dfe885ae744/bin-2019/uautomizer/data/84c1e4fee/8fbcd4d6d4df467098a235473357aad8/FLAGceb43df0c [2018-11-10 05:14:06,053 INFO L298 CDTParser]: Found 1 translation units. [2018-11-10 05:14:06,054 INFO L158 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_97fcdc10-d2aa-4d82-a03b-8dfe885ae744/sv-benchmarks/c/termination-crafted/NestedRecursion_2b_true-no-overflow_false-termination_true-valid-memsafety.c [2018-11-10 05:14:06,058 INFO L346 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_97fcdc10-d2aa-4d82-a03b-8dfe885ae744/bin-2019/uautomizer/data/84c1e4fee/8fbcd4d6d4df467098a235473357aad8/FLAGceb43df0c [2018-11-10 05:14:06,070 INFO L354 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_97fcdc10-d2aa-4d82-a03b-8dfe885ae744/bin-2019/uautomizer/data/84c1e4fee/8fbcd4d6d4df467098a235473357aad8 [2018-11-10 05:14:06,072 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-10 05:14:06,073 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-10 05:14:06,074 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-10 05:14:06,074 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-10 05:14:06,078 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-10 05:14:06,078 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 05:14:06" (1/1) ... [2018-11-10 05:14:06,081 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b12072f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:14:06, skipping insertion in model container [2018-11-10 05:14:06,081 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 05:14:06" (1/1) ... [2018-11-10 05:14:06,091 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-10 05:14:06,103 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-10 05:14:06,217 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-10 05:14:06,220 INFO L189 MainTranslator]: Completed pre-run [2018-11-10 05:14:06,231 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-10 05:14:06,241 INFO L193 MainTranslator]: Completed translation [2018-11-10 05:14:06,241 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:14:06 WrapperNode [2018-11-10 05:14:06,241 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-10 05:14:06,242 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-10 05:14:06,242 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-10 05:14:06,242 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-10 05:14:06,251 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:14:06" (1/1) ... [2018-11-10 05:14:06,255 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:14:06" (1/1) ... [2018-11-10 05:14:06,268 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-10 05:14:06,268 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-10 05:14:06,268 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-10 05:14:06,268 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-10 05:14:06,277 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:14:06" (1/1) ... [2018-11-10 05:14:06,278 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:14:06" (1/1) ... [2018-11-10 05:14:06,278 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:14:06" (1/1) ... [2018-11-10 05:14:06,278 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:14:06" (1/1) ... [2018-11-10 05:14:06,280 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:14:06" (1/1) ... [2018-11-10 05:14:06,282 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:14:06" (1/1) ... [2018-11-10 05:14:06,283 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:14:06" (1/1) ... [2018-11-10 05:14:06,284 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-10 05:14:06,284 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-10 05:14:06,284 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-10 05:14:06,285 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-10 05:14:06,285 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:14:06" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_97fcdc10-d2aa-4d82-a03b-8dfe885ae744/bin-2019/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-10 05:14:06,372 INFO L130 BoogieDeclarations]: Found specification of procedure g [2018-11-10 05:14:06,372 INFO L138 BoogieDeclarations]: Found implementation of procedure g [2018-11-10 05:14:06,372 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-10 05:14:06,373 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-10 05:14:06,481 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-10 05:14:06,482 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 05:14:06 BoogieIcfgContainer [2018-11-10 05:14:06,482 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-10 05:14:06,482 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2018-11-10 05:14:06,482 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2018-11-10 05:14:06,485 INFO L276 PluginConnector]: BuchiAutomizer initialized [2018-11-10 05:14:06,486 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-11-10 05:14:06,486 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 10.11 05:14:06" (1/3) ... [2018-11-10 05:14:06,487 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@252314b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 10.11 05:14:06, skipping insertion in model container [2018-11-10 05:14:06,487 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-11-10 05:14:06,487 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 05:14:06" (2/3) ... [2018-11-10 05:14:06,488 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@252314b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 10.11 05:14:06, skipping insertion in model container [2018-11-10 05:14:06,488 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-11-10 05:14:06,488 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 05:14:06" (3/3) ... [2018-11-10 05:14:06,489 INFO L375 chiAutomizerObserver]: Analyzing ICFG NestedRecursion_2b_true-no-overflow_false-termination_true-valid-memsafety.c [2018-11-10 05:14:06,544 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-11-10 05:14:06,545 INFO L374 BuchiCegarLoop]: Interprodecural is true [2018-11-10 05:14:06,545 INFO L375 BuchiCegarLoop]: Hoare is false [2018-11-10 05:14:06,545 INFO L376 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2018-11-10 05:14:06,545 INFO L377 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-10 05:14:06,545 INFO L378 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-10 05:14:06,545 INFO L379 BuchiCegarLoop]: Difference is false [2018-11-10 05:14:06,546 INFO L380 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-10 05:14:06,546 INFO L383 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2018-11-10 05:14:06,560 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 15 states. [2018-11-10 05:14:06,579 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2018-11-10 05:14:06,579 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-10 05:14:06,579 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-10 05:14:06,586 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2018-11-10 05:14:06,586 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2018-11-10 05:14:06,586 INFO L442 BuchiCegarLoop]: ======== Iteration 1============ [2018-11-10 05:14:06,586 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 15 states. [2018-11-10 05:14:06,587 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2018-11-10 05:14:06,588 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-10 05:14:06,588 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-10 05:14:06,588 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2018-11-10 05:14:06,588 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2018-11-10 05:14:06,593 INFO L793 eck$LassoCheckResult]: Stem: 11#ULTIMATE.startENTRYtrue assume { :begin_inline_ULTIMATE.init } true; 9#L-1true assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res;havoc main_#t~nondet2, main_#t~ret3, main_~x~0;main_~x~0 := main_#t~nondet2;havoc main_#t~nondet2; 7#L20true assume !(main_~x~0 < 0); 10#L21true call main_#t~ret3 := g(main_~x~0);< 12#gENTRYtrue [2018-11-10 05:14:06,594 INFO L795 eck$LassoCheckResult]: Loop: 12#gENTRYtrue ~x := #in~x; 3#L12true assume !(~x == 0); 14#L15true call #t~ret0 := g(~x - 1);< 12#gENTRYtrue [2018-11-10 05:14:06,598 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:14:06,598 INFO L82 PathProgramCache]: Analyzing trace with hash 1202733, now seen corresponding path program 1 times [2018-11-10 05:14:06,599 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 05:14:06,600 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 05:14:06,641 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:14:06,642 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:14:06,642 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:14:06,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-10 05:14:06,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-10 05:14:06,675 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:14:06,675 INFO L82 PathProgramCache]: Analyzing trace with hash 29937, now seen corresponding path program 1 times [2018-11-10 05:14:06,676 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 05:14:06,676 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 05:14:06,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:14:06,677 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:14:06,677 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:14:06,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-10 05:14:06,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-10 05:14:06,686 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:14:06,686 INFO L82 PathProgramCache]: Analyzing trace with hash 1470880581, now seen corresponding path program 1 times [2018-11-10 05:14:06,686 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 05:14:06,686 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 05:14:06,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:14:06,687 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:14:06,687 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:14:06,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-10 05:14:06,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-10 05:14:06,763 INFO L214 LassoAnalysis]: Preferences: [2018-11-10 05:14:06,764 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-10 05:14:06,764 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-10 05:14:06,764 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-10 05:14:06,765 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-10 05:14:06,765 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-10 05:14:06,765 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-10 05:14:06,765 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-10 05:14:06,765 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_2b_true-no-overflow_false-termination_true-valid-memsafety.c_Iteration1_Loop [2018-11-10 05:14:06,765 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-10 05:14:06,766 INFO L280 LassoAnalysis]: Starting lasso preprocessing... [2018-11-10 05:14:06,786 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-10 05:14:06,792 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-10 05:14:06,796 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-10 05:14:06,801 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-10 05:14:06,806 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-10 05:14:06,871 INFO L298 LassoAnalysis]: Preprocessing complete. [2018-11-10 05:14:06,871 INFO L410 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_97fcdc10-d2aa-4d82-a03b-8dfe885ae744/bin-2019/uautomizer/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-10 05:14:06,875 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-10 05:14:06,875 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-10 05:14:06,885 INFO L443 LassoAnalysis]: Proved nontermination for one component. [2018-11-10 05:14:06,885 INFO L446 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_97fcdc10-d2aa-4d82-a03b-8dfe885ae744/bin-2019/uautomizer/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-10 05:14:06,904 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-10 05:14:06,905 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-10 05:14:06,908 INFO L443 LassoAnalysis]: Proved nontermination for one component. [2018-11-10 05:14:06,908 INFO L446 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_97fcdc10-d2aa-4d82-a03b-8dfe885ae744/bin-2019/uautomizer/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-10 05:14:06,936 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-10 05:14:06,937 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-10 05:14:06,949 INFO L443 LassoAnalysis]: Proved nontermination for one component. [2018-11-10 05:14:06,949 INFO L446 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_97fcdc10-d2aa-4d82-a03b-8dfe885ae744/bin-2019/uautomizer/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-10 05:14:06,980 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-10 05:14:06,980 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-10 05:14:06,984 INFO L443 LassoAnalysis]: Proved nontermination for one component. [2018-11-10 05:14:06,984 INFO L446 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_97fcdc10-d2aa-4d82-a03b-8dfe885ae744/bin-2019/uautomizer/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-10 05:14:07,010 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-10 05:14:07,011 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_97fcdc10-d2aa-4d82-a03b-8dfe885ae744/bin-2019/uautomizer/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-10 05:14:07,031 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-10 05:14:07,032 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-10 05:14:07,062 INFO L443 LassoAnalysis]: Proved nontermination for one component. [2018-11-10 05:14:07,063 INFO L446 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#in~x=-8} Honda state: {g_#in~x=-8} Generalized eigenvectors: [{g_#in~x=-1}, {g_#in~x=0}, {g_#in~x=0}] Lambdas: [1, 4, 6] Nus: [0, 1] [2018-11-10 05:14:07,119 INFO L214 LassoAnalysis]: Preferences: [2018-11-10 05:14:07,120 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-10 05:14:07,120 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-10 05:14:07,120 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-10 05:14:07,120 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-10 05:14:07,120 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-10 05:14:07,120 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-10 05:14:07,120 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-10 05:14:07,120 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_2b_true-no-overflow_false-termination_true-valid-memsafety.c_Iteration1_Lasso [2018-11-10 05:14:07,120 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-10 05:14:07,120 INFO L280 LassoAnalysis]: Starting lasso preprocessing... [2018-11-10 05:14:07,121 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-10 05:14:07,123 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-10 05:14:07,125 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-10 05:14:07,126 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-10 05:14:07,128 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-10 05:14:07,130 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-10 05:14:07,131 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-10 05:14:07,133 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-10 05:14:07,139 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-10 05:14:07,140 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-10 05:14:07,253 INFO L298 LassoAnalysis]: Preprocessing complete. [2018-11-10 05:14:07,253 INFO L410 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_97fcdc10-d2aa-4d82-a03b-8dfe885ae744/bin-2019/uautomizer/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-10 05:14:07,255 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-10 05:14:07,256 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-10 05:14:07,259 INFO L443 LassoAnalysis]: Proved nontermination for one component. [2018-11-10 05:14:07,260 INFO L446 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_97fcdc10-d2aa-4d82-a03b-8dfe885ae744/bin-2019/uautomizer/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-10 05:14:07,292 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-10 05:14:07,292 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-10 05:14:07,296 INFO L443 LassoAnalysis]: Proved nontermination for one component. [2018-11-10 05:14:07,296 INFO L446 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_97fcdc10-d2aa-4d82-a03b-8dfe885ae744/bin-2019/uautomizer/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-10 05:14:07,330 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-10 05:14:07,331 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-10 05:14:07,334 INFO L443 LassoAnalysis]: Proved nontermination for one component. [2018-11-10 05:14:07,334 INFO L446 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_97fcdc10-d2aa-4d82-a03b-8dfe885ae744/bin-2019/uautomizer/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-10 05:14:07,355 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-10 05:14:07,355 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-10 05:14:07,358 INFO L443 LassoAnalysis]: Proved nontermination for one component. [2018-11-10 05:14:07,358 INFO L446 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_97fcdc10-d2aa-4d82-a03b-8dfe885ae744/bin-2019/uautomizer/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-10 05:14:07,378 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-10 05:14:07,379 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-10 05:14:07,381 INFO L443 LassoAnalysis]: Proved nontermination for one component. [2018-11-10 05:14:07,381 INFO L446 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_97fcdc10-d2aa-4d82-a03b-8dfe885ae744/bin-2019/uautomizer/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-10 05:14:07,401 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-10 05:14:07,401 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-10 05:14:07,404 INFO L443 LassoAnalysis]: Proved nontermination for one component. [2018-11-10 05:14:07,404 INFO L446 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_~x~0=0} Honda state: {ULTIMATE.start_main_~x~0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_97fcdc10-d2aa-4d82-a03b-8dfe885ae744/bin-2019/uautomizer/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-10 05:14:07,423 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-10 05:14:07,423 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-10 05:14:07,429 INFO L443 LassoAnalysis]: Proved nontermination for one component. [2018-11-10 05:14:07,429 INFO L446 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_97fcdc10-d2aa-4d82-a03b-8dfe885ae744/bin-2019/uautomizer/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-10 05:14:07,448 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-10 05:14:07,448 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_97fcdc10-d2aa-4d82-a03b-8dfe885ae744/bin-2019/uautomizer/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-10 05:14:07,471 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-10 05:14:07,471 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-10 05:14:07,497 INFO L450 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-10 05:14:07,498 INFO L214 LassoAnalysis]: Preferences: [2018-11-10 05:14:07,498 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-10 05:14:07,498 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-10 05:14:07,498 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-10 05:14:07,498 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-10 05:14:07,498 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-10 05:14:07,499 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-10 05:14:07,499 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-10 05:14:07,499 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_2b_true-no-overflow_false-termination_true-valid-memsafety.c_Iteration1_Lasso [2018-11-10 05:14:07,499 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-10 05:14:07,499 INFO L280 LassoAnalysis]: Starting lasso preprocessing... [2018-11-10 05:14:07,500 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-10 05:14:07,502 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-10 05:14:07,503 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-10 05:14:07,505 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-10 05:14:07,506 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-10 05:14:07,507 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-10 05:14:07,508 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-10 05:14:07,509 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-10 05:14:07,510 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-10 05:14:07,512 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-10 05:14:07,566 INFO L298 LassoAnalysis]: Preprocessing complete. [2018-11-10 05:14:07,571 INFO L496 LassoAnalysis]: Using template 'affine'. [2018-11-10 05:14:07,573 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-10 05:14:07,575 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-10 05:14:07,575 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-10 05:14:07,576 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-10 05:14:07,576 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-10 05:14:07,576 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-10 05:14:07,578 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-10 05:14:07,578 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-10 05:14:07,582 INFO L529 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-10 05:14:07,583 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-10 05:14:07,583 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-10 05:14:07,584 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-10 05:14:07,584 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-10 05:14:07,584 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-10 05:14:07,584 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-10 05:14:07,585 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-10 05:14:07,585 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-10 05:14:07,587 INFO L529 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-10 05:14:07,587 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-10 05:14:07,588 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-10 05:14:07,588 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-10 05:14:07,588 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-10 05:14:07,588 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-10 05:14:07,589 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-10 05:14:07,589 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-10 05:14:07,589 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-10 05:14:07,591 INFO L529 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-10 05:14:07,591 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-10 05:14:07,592 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-10 05:14:07,592 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-10 05:14:07,592 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-10 05:14:07,593 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-10 05:14:07,593 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-10 05:14:07,593 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-10 05:14:07,593 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-10 05:14:07,595 INFO L529 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-10 05:14:07,595 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-10 05:14:07,596 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-10 05:14:07,599 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-10 05:14:07,600 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-10 05:14:07,600 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-10 05:14:07,600 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-10 05:14:07,601 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-10 05:14:07,601 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-10 05:14:07,602 INFO L529 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-10 05:14:07,602 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-10 05:14:07,603 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-10 05:14:07,603 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-10 05:14:07,603 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-10 05:14:07,604 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-10 05:14:07,604 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-10 05:14:07,604 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-10 05:14:07,604 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-10 05:14:07,605 INFO L529 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-10 05:14:07,606 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-10 05:14:07,606 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-10 05:14:07,607 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-10 05:14:07,607 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-10 05:14:07,607 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-10 05:14:07,607 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-10 05:14:07,608 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-10 05:14:07,608 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-10 05:14:07,609 INFO L529 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-10 05:14:07,609 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-10 05:14:07,610 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-10 05:14:07,610 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-10 05:14:07,610 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-10 05:14:07,611 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-10 05:14:07,611 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-10 05:14:07,611 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-10 05:14:07,611 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-10 05:14:07,613 INFO L529 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-10 05:14:07,613 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-10 05:14:07,614 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-10 05:14:07,614 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-10 05:14:07,614 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-10 05:14:07,614 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-10 05:14:07,615 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-10 05:14:07,615 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-10 05:14:07,615 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-10 05:14:07,616 INFO L529 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-10 05:14:07,617 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-10 05:14:07,617 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-10 05:14:07,618 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-10 05:14:07,618 INFO L206 nArgumentSynthesizer]: 2 loop disjuncts [2018-11-10 05:14:07,618 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-10 05:14:07,626 INFO L402 nArgumentSynthesizer]: We have 16 Motzkin's Theorem applications. [2018-11-10 05:14:07,627 INFO L403 nArgumentSynthesizer]: A total of 4 supporting invariants were added. [2018-11-10 05:14:07,701 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-10 05:14:07,732 INFO L443 ModelExtractionUtils]: Simplification made 7 calls to the SMT solver. [2018-11-10 05:14:07,733 INFO L444 ModelExtractionUtils]: 4 out of 11 variables were initially zero. Simplification set additionally 4 variables to zero. [2018-11-10 05:14:07,735 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-10 05:14:07,740 INFO L440 nArgumentSynthesizer]: Removed 3 redundant supporting invariants from a total of 4. [2018-11-10 05:14:07,740 INFO L517 LassoAnalysis]: Proved termination. [2018-11-10 05:14:07,741 INFO L519 LassoAnalysis]: Termination argument consisting of: Ranking function f(g_#in~x) = 1*g_#in~x Supporting invariants [1*g_#in~x >= 0] [2018-11-10 05:14:07,744 INFO L297 tatePredicateManager]: 0 out of 1 supporting invariants were superfluous and have been removed [2018-11-10 05:14:07,779 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:14:07,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:14:07,795 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:14:07,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:14:07,821 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:14:07,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 05:14:07,863 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 [2018-11-10 05:14:07,864 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 15 states. Second operand 5 states. [2018-11-10 05:14:07,981 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 15 states.. Second operand 5 states. Result 36 states and 43 transitions. Complement of second has 13 states. [2018-11-10 05:14:07,982 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 [2018-11-10 05:14:07,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-11-10 05:14:07,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 12 transitions. [2018-11-10 05:14:07,986 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 12 transitions. Stem has 4 letters. Loop has 3 letters. [2018-11-10 05:14:07,987 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-10 05:14:07,987 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 12 transitions. Stem has 7 letters. Loop has 3 letters. [2018-11-10 05:14:07,988 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-10 05:14:07,988 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 12 transitions. Stem has 4 letters. Loop has 6 letters. [2018-11-10 05:14:07,988 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-10 05:14:07,989 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 36 states and 43 transitions. [2018-11-10 05:14:07,993 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2018-11-10 05:14:07,999 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 36 states to 20 states and 26 transitions. [2018-11-10 05:14:08,000 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 14 [2018-11-10 05:14:08,001 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 15 [2018-11-10 05:14:08,001 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 26 transitions. [2018-11-10 05:14:08,003 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-10 05:14:08,003 INFO L705 BuchiCegarLoop]: Abstraction has 20 states and 26 transitions. [2018-11-10 05:14:08,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states and 26 transitions. [2018-11-10 05:14:08,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2018-11-10 05:14:08,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-11-10 05:14:08,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2018-11-10 05:14:08,029 INFO L728 BuchiCegarLoop]: Abstraction has 18 states and 22 transitions. [2018-11-10 05:14:08,029 INFO L608 BuchiCegarLoop]: Abstraction has 18 states and 22 transitions. [2018-11-10 05:14:08,029 INFO L442 BuchiCegarLoop]: ======== Iteration 2============ [2018-11-10 05:14:08,029 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 18 states and 22 transitions. [2018-11-10 05:14:08,030 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2018-11-10 05:14:08,030 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-10 05:14:08,030 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-10 05:14:08,031 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 05:14:08,031 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1] [2018-11-10 05:14:08,031 INFO L793 eck$LassoCheckResult]: Stem: 127#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 119#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res;havoc main_#t~nondet2, main_#t~ret3, main_~x~0;main_~x~0 := main_#t~nondet2;havoc main_#t~nondet2; 120#L20 assume !(main_~x~0 < 0); 125#L21 call main_#t~ret3 := g(main_~x~0);< 126#gENTRY ~x := #in~x; 124#L12 assume !(~x == 0); 122#L15 call #t~ret0 := g(~x - 1);< 128#gENTRY ~x := #in~x; 121#L12 assume ~x == 0;#res := 1; 123#gFINAL assume true; 129#gEXIT >#23#return; 131#L15-1 [2018-11-10 05:14:08,031 INFO L795 eck$LassoCheckResult]: Loop: 131#L15-1 call #t~ret1 := g(#t~ret0 + 1);< 132#gENTRY ~x := #in~x; 135#L12 assume !(~x == 0); 130#L15 call #t~ret0 := g(~x - 1);< 132#gENTRY ~x := #in~x; 135#L12 assume ~x == 0;#res := 1; 134#gFINAL assume true; 136#gEXIT >#23#return; 131#L15-1 [2018-11-10 05:14:08,031 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:14:08,032 INFO L82 PathProgramCache]: Analyzing trace with hash -1676493545, now seen corresponding path program 1 times [2018-11-10 05:14:08,032 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 05:14:08,032 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 05:14:08,033 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:14:08,033 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:14:08,033 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:14:08,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-10 05:14:08,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-10 05:14:08,040 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:14:08,040 INFO L82 PathProgramCache]: Analyzing trace with hash 1500125133, now seen corresponding path program 1 times [2018-11-10 05:14:08,040 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 05:14:08,040 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 05:14:08,041 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:14:08,041 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:14:08,042 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:14:08,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-10 05:14:08,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-10 05:14:08,048 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:14:08,049 INFO L82 PathProgramCache]: Analyzing trace with hash 122773219, now seen corresponding path program 1 times [2018-11-10 05:14:08,049 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 05:14:08,049 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 05:14:08,050 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:14:08,050 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:14:08,050 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:14:08,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:14:08,130 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-10 05:14:08,131 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 05:14:08,132 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_97fcdc10-d2aa-4d82-a03b-8dfe885ae744/bin-2019/uautomizer/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 05:14:08,143 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:14:08,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:14:08,153 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:14:08,164 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-10 05:14:08,183 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 05:14:08,183 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-11-10 05:14:08,265 INFO L214 LassoAnalysis]: Preferences: [2018-11-10 05:14:08,266 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-10 05:14:08,266 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-10 05:14:08,266 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-10 05:14:08,266 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-10 05:14:08,266 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-10 05:14:08,266 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-10 05:14:08,266 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-10 05:14:08,266 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_2b_true-no-overflow_false-termination_true-valid-memsafety.c_Iteration2_Loop [2018-11-10 05:14:08,266 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-10 05:14:08,267 INFO L280 LassoAnalysis]: Starting lasso preprocessing... [2018-11-10 05:14:08,268 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-10 05:14:08,275 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-10 05:14:08,277 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-10 05:14:08,324 INFO L298 LassoAnalysis]: Preprocessing complete. [2018-11-10 05:14:08,324 INFO L410 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_97fcdc10-d2aa-4d82-a03b-8dfe885ae744/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 [2018-11-10 05:14:08,331 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-10 05:14:08,332 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_97fcdc10-d2aa-4d82-a03b-8dfe885ae744/bin-2019/uautomizer/z3 Starting monitored process 19 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 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-10 05:14:08,354 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-10 05:14:08,354 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-10 05:14:09,380 INFO L450 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-10 05:14:09,382 INFO L214 LassoAnalysis]: Preferences: [2018-11-10 05:14:09,382 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-10 05:14:09,382 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-10 05:14:09,382 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-10 05:14:09,382 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-10 05:14:09,382 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-10 05:14:09,382 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-10 05:14:09,382 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-10 05:14:09,382 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_2b_true-no-overflow_false-termination_true-valid-memsafety.c_Iteration2_Loop [2018-11-10 05:14:09,382 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-10 05:14:09,383 INFO L280 LassoAnalysis]: Starting lasso preprocessing... [2018-11-10 05:14:09,383 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-10 05:14:09,385 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-10 05:14:09,390 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-10 05:14:09,415 INFO L298 LassoAnalysis]: Preprocessing complete. [2018-11-10 05:14:09,415 INFO L496 LassoAnalysis]: Using template 'affine'. [2018-11-10 05:14:09,416 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-10 05:14:09,416 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-10 05:14:09,416 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-10 05:14:09,417 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-10 05:14:09,417 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-10 05:14:09,417 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-10 05:14:09,417 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-10 05:14:09,418 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-10 05:14:09,418 INFO L529 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-10 05:14:09,419 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-10 05:14:09,419 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-10 05:14:09,419 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-10 05:14:09,419 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-10 05:14:09,420 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-10 05:14:09,420 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-10 05:14:09,421 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-10 05:14:09,421 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-10 05:14:09,424 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-10 05:14:09,426 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-11-10 05:14:09,427 INFO L444 ModelExtractionUtils]: 2 out of 5 variables were initially zero. Simplification set additionally 0 variables to zero. [2018-11-10 05:14:09,427 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-10 05:14:09,427 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-10 05:14:09,427 INFO L517 LassoAnalysis]: Proved termination. [2018-11-10 05:14:09,428 INFO L519 LassoAnalysis]: Termination argument consisting of: Ranking function f(g_#t~ret0) = -2*g_#t~ret0 + 1 Supporting invariants [] [2018-11-10 05:14:09,428 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-10 05:14:09,446 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:14:09,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:14:09,462 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:14:09,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:14:09,491 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:14:09,586 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 05:14:09,586 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 [2018-11-10 05:14:09,587 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 18 states and 22 transitions. cyclomatic complexity: 6 Second operand 8 states. [2018-11-10 05:14:09,799 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 18 states and 22 transitions. cyclomatic complexity: 6. Second operand 8 states. Result 83 states and 121 transitions. Complement of second has 31 states. [2018-11-10 05:14:09,800 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 [2018-11-10 05:14:09,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-11-10 05:14:09,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 37 transitions. [2018-11-10 05:14:09,802 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 37 transitions. Stem has 11 letters. Loop has 8 letters. [2018-11-10 05:14:09,803 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-10 05:14:09,803 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 37 transitions. Stem has 19 letters. Loop has 8 letters. [2018-11-10 05:14:09,803 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-10 05:14:09,803 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 37 transitions. Stem has 11 letters. Loop has 16 letters. [2018-11-10 05:14:09,804 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-10 05:14:09,804 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 83 states and 121 transitions. [2018-11-10 05:14:09,808 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 8 [2018-11-10 05:14:09,811 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 83 states to 59 states and 82 transitions. [2018-11-10 05:14:09,811 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 45 [2018-11-10 05:14:09,811 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 46 [2018-11-10 05:14:09,812 INFO L73 IsDeterministic]: Start isDeterministic. Operand 59 states and 82 transitions. [2018-11-10 05:14:09,812 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-10 05:14:09,812 INFO L705 BuchiCegarLoop]: Abstraction has 59 states and 82 transitions. [2018-11-10 05:14:09,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states and 82 transitions. [2018-11-10 05:14:09,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 53. [2018-11-10 05:14:09,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-11-10 05:14:09,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 72 transitions. [2018-11-10 05:14:09,819 INFO L728 BuchiCegarLoop]: Abstraction has 53 states and 72 transitions. [2018-11-10 05:14:09,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-10 05:14:09,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-11-10 05:14:09,822 INFO L87 Difference]: Start difference. First operand 53 states and 72 transitions. Second operand 8 states. [2018-11-10 05:14:09,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:14:09,877 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2018-11-10 05:14:09,877 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-10 05:14:09,877 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 40 states and 45 transitions. [2018-11-10 05:14:09,878 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2018-11-10 05:14:09,878 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 40 states to 31 states and 35 transitions. [2018-11-10 05:14:09,878 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 26 [2018-11-10 05:14:09,879 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 26 [2018-11-10 05:14:09,879 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 35 transitions. [2018-11-10 05:14:09,879 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-10 05:14:09,879 INFO L705 BuchiCegarLoop]: Abstraction has 31 states and 35 transitions. [2018-11-10 05:14:09,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states and 35 transitions. [2018-11-10 05:14:09,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2018-11-10 05:14:09,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-11-10 05:14:09,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2018-11-10 05:14:09,881 INFO L728 BuchiCegarLoop]: Abstraction has 26 states and 28 transitions. [2018-11-10 05:14:09,881 INFO L608 BuchiCegarLoop]: Abstraction has 26 states and 28 transitions. [2018-11-10 05:14:09,881 INFO L442 BuchiCegarLoop]: ======== Iteration 3============ [2018-11-10 05:14:09,881 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 26 states and 28 transitions. [2018-11-10 05:14:09,881 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2018-11-10 05:14:09,881 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-10 05:14:09,881 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-10 05:14:09,882 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 05:14:09,882 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2018-11-10 05:14:09,882 INFO L793 eck$LassoCheckResult]: Stem: 509#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 500#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res;havoc main_#t~nondet2, main_#t~ret3, main_~x~0;main_~x~0 := main_#t~nondet2;havoc main_#t~nondet2; 501#L20 assume !(main_~x~0 < 0); 502#L21 call main_#t~ret3 := g(main_~x~0);< 503#gENTRY ~x := #in~x; 507#L12 assume !(~x == 0); 508#L15 call #t~ret0 := g(~x - 1);< 513#gENTRY ~x := #in~x; 514#L12 assume ~x == 0;#res := 1; 521#gFINAL assume true; 520#gEXIT >#23#return; 518#L15-1 call #t~ret1 := g(#t~ret0 + 1);< 525#gENTRY ~x := #in~x; 524#L12 assume !(~x == 0); 505#L15 call #t~ret0 := g(~x - 1);< 519#gENTRY ~x := #in~x; 504#L12 assume !(~x == 0); 506#L15 [2018-11-10 05:14:09,882 INFO L795 eck$LassoCheckResult]: Loop: 506#L15 call #t~ret0 := g(~x - 1);< 522#gENTRY ~x := #in~x; 523#L12 assume !(~x == 0); 506#L15 [2018-11-10 05:14:09,882 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:14:09,882 INFO L82 PathProgramCache]: Analyzing trace with hash -1443446059, now seen corresponding path program 2 times [2018-11-10 05:14:09,882 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 05:14:09,882 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 05:14:09,883 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:14:09,883 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 05:14:09,883 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:14:09,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-10 05:14:09,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-10 05:14:09,891 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:14:09,891 INFO L82 PathProgramCache]: Analyzing trace with hash 50937, now seen corresponding path program 2 times [2018-11-10 05:14:09,892 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 05:14:09,892 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 05:14:09,892 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:14:09,892 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 05:14:09,892 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:14:09,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-10 05:14:09,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-10 05:14:09,895 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:14:09,896 INFO L82 PathProgramCache]: Analyzing trace with hash -488954971, now seen corresponding path program 3 times [2018-11-10 05:14:09,896 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 05:14:09,896 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 05:14:09,896 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:14:09,897 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 05:14:09,897 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:14:09,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 05:14:09,974 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-10 05:14:09,974 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 05:14:09,974 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_97fcdc10-d2aa-4d82-a03b-8dfe885ae744/bin-2019/uautomizer/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 05:14:09,981 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-10 05:14:09,990 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-11-10 05:14:09,991 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 05:14:09,992 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 05:14:10,004 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-10 05:14:10,022 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 05:14:10,022 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-11-10 05:14:10,044 INFO L214 LassoAnalysis]: Preferences: [2018-11-10 05:14:10,044 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-10 05:14:10,044 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-10 05:14:10,044 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-10 05:14:10,044 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-10 05:14:10,044 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-10 05:14:10,044 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-10 05:14:10,045 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-10 05:14:10,045 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_2b_true-no-overflow_false-termination_true-valid-memsafety.c_Iteration3_Loop [2018-11-10 05:14:10,045 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-10 05:14:10,045 INFO L280 LassoAnalysis]: Starting lasso preprocessing... [2018-11-10 05:14:10,045 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-10 05:14:10,050 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-10 05:14:10,051 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-10 05:14:10,052 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-10 05:14:10,077 INFO L298 LassoAnalysis]: Preprocessing complete. [2018-11-10 05:14:10,077 INFO L410 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_97fcdc10-d2aa-4d82-a03b-8dfe885ae744/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 [2018-11-10 05:14:10,080 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-10 05:14:10,080 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_97fcdc10-d2aa-4d82-a03b-8dfe885ae744/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 [2018-11-10 05:14:10,103 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-10 05:14:10,103 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-10 05:14:10,309 INFO L443 LassoAnalysis]: Proved nontermination for one component. [2018-11-10 05:14:10,310 INFO L446 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=-5, g_~x=0}, {g_#in~x=5, g_~x=0}, {g_#in~x=-1, g_~x=-1}] Lambdas: [1, 0, 1] Nus: [1, 0] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_97fcdc10-d2aa-4d82-a03b-8dfe885ae744/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 [2018-11-10 05:14:10,327 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-10 05:14:10,327 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-10 05:14:10,330 INFO L443 LassoAnalysis]: Proved nontermination for one component. [2018-11-10 05:14:10,330 INFO L446 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_97fcdc10-d2aa-4d82-a03b-8dfe885ae744/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 [2018-11-10 05:14:10,350 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-10 05:14:10,350 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-10 05:14:10,352 INFO L443 LassoAnalysis]: Proved nontermination for one component. [2018-11-10 05:14:10,352 INFO L446 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_97fcdc10-d2aa-4d82-a03b-8dfe885ae744/bin-2019/uautomizer/z3 Starting monitored process 25 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 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-10 05:14:10,371 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-10 05:14:10,371 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-10 05:14:10,373 INFO L443 LassoAnalysis]: Proved nontermination for one component. [2018-11-10 05:14:10,373 INFO L446 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#t~ret0=0} Honda state: {g_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2018-11-10 05:14:10,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-10 05:14:10,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-11-10 05:14:10,392 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. cyclomatic complexity: 4 Second operand 10 states. [2018-11-10 05:14:10,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 05:14:10,493 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2018-11-10 05:14:10,493 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-10 05:14:10,493 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 28 states and 29 transitions. [2018-11-10 05:14:10,494 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2018-11-10 05:14:10,494 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 28 states to 28 states and 29 transitions. [2018-11-10 05:14:10,495 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 25 [2018-11-10 05:14:10,495 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 25 [2018-11-10 05:14:10,495 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 29 transitions. [2018-11-10 05:14:10,495 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-10 05:14:10,495 INFO L705 BuchiCegarLoop]: Abstraction has 28 states and 29 transitions. [2018-11-10 05:14:10,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states and 29 transitions. [2018-11-10 05:14:10,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 22. [2018-11-10 05:14:10,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-11-10 05:14:10,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2018-11-10 05:14:10,496 INFO L728 BuchiCegarLoop]: Abstraction has 22 states and 23 transitions. [2018-11-10 05:14:10,496 INFO L608 BuchiCegarLoop]: Abstraction has 22 states and 23 transitions. [2018-11-10 05:14:10,496 INFO L442 BuchiCegarLoop]: ======== Iteration 4============ [2018-11-10 05:14:10,496 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 22 states and 23 transitions. [2018-11-10 05:14:10,497 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2018-11-10 05:14:10,497 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-10 05:14:10,497 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-10 05:14:10,497 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 05:14:10,498 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [3, 2, 2, 1, 1, 1, 1] [2018-11-10 05:14:10,498 INFO L793 eck$LassoCheckResult]: Stem: 647#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 638#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res;havoc main_#t~nondet2, main_#t~ret3, main_~x~0;main_~x~0 := main_#t~nondet2;havoc main_#t~nondet2; 639#L20 assume !(main_~x~0 < 0); 640#L21 call main_#t~ret3 := g(main_~x~0);< 641#gENTRY ~x := #in~x; 645#L12 assume !(~x == 0); 646#L15 call #t~ret0 := g(~x - 1);< 650#gENTRY ~x := #in~x; 651#L12 assume ~x == 0;#res := 1; 652#gFINAL assume true; 653#gEXIT >#23#return; 643#L15-1 [2018-11-10 05:14:10,498 INFO L795 eck$LassoCheckResult]: Loop: 643#L15-1 call #t~ret1 := g(#t~ret0 + 1);< 654#gENTRY ~x := #in~x; 642#L12 assume !(~x == 0); 644#L15 call #t~ret0 := g(~x - 1);< 648#gENTRY ~x := #in~x; 649#L12 assume !(~x == 0); 656#L15 call #t~ret0 := g(~x - 1);< 657#gENTRY ~x := #in~x; 659#L12 assume ~x == 0;#res := 1; 658#gFINAL assume true; 655#gEXIT >#23#return; 643#L15-1 [2018-11-10 05:14:10,498 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:14:10,498 INFO L82 PathProgramCache]: Analyzing trace with hash -1676493545, now seen corresponding path program 2 times [2018-11-10 05:14:10,498 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 05:14:10,498 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 05:14:10,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:14:10,499 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 05:14:10,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:14:10,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-10 05:14:10,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-10 05:14:10,504 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:14:10,504 INFO L82 PathProgramCache]: Analyzing trace with hash 1133998729, now seen corresponding path program 2 times [2018-11-10 05:14:10,504 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 05:14:10,505 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 05:14:10,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:14:10,505 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 05:14:10,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:14:10,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-10 05:14:10,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-10 05:14:10,511 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 05:14:10,511 INFO L82 PathProgramCache]: Analyzing trace with hash -1734292557, now seen corresponding path program 4 times [2018-11-10 05:14:10,511 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 05:14:10,512 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 05:14:10,512 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:14:10,514 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 05:14:10,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 05:14:10,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-10 05:14:10,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-10 05:14:10,687 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 10.11 05:14:10 BoogieIcfgContainer [2018-11-10 05:14:10,687 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2018-11-10 05:14:10,688 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-10 05:14:10,688 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-10 05:14:10,688 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-10 05:14:10,688 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 05:14:06" (3/4) ... [2018-11-10 05:14:10,692 INFO L141 WitnessPrinter]: Generating witness for non-termination counterexample [2018-11-10 05:14:10,729 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_97fcdc10-d2aa-4d82-a03b-8dfe885ae744/bin-2019/uautomizer/witness.graphml [2018-11-10 05:14:10,729 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-10 05:14:10,730 INFO L168 Benchmark]: Toolchain (without parser) took 4657.36 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 138.9 MB). Free memory was 959.1 MB in the beginning and 949.8 MB in the end (delta: 9.4 MB). Peak memory consumption was 148.3 MB. Max. memory is 11.5 GB. [2018-11-10 05:14:10,731 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 05:14:10,732 INFO L168 Benchmark]: CACSL2BoogieTranslator took 167.62 ms. Allocated memory is still 1.0 GB. Free memory was 959.1 MB in the beginning and 948.4 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-10 05:14:10,732 INFO L168 Benchmark]: Boogie Procedure Inliner took 26.26 ms. Allocated memory is still 1.0 GB. Free memory is still 948.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 05:14:10,732 INFO L168 Benchmark]: Boogie Preprocessor took 15.82 ms. Allocated memory is still 1.0 GB. Free memory was 948.4 MB in the beginning and 945.7 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-10 05:14:10,733 INFO L168 Benchmark]: RCFGBuilder took 197.50 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 138.9 MB). Free memory was 945.7 MB in the beginning and 1.1 GB in the end (delta: -183.6 MB). Peak memory consumption was 19.9 MB. Max. memory is 11.5 GB. [2018-11-10 05:14:10,733 INFO L168 Benchmark]: BuchiAutomizer took 4205.23 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 952.9 MB in the end (delta: 176.4 MB). Peak memory consumption was 176.4 MB. Max. memory is 11.5 GB. [2018-11-10 05:14:10,733 INFO L168 Benchmark]: Witness Printer took 41.50 ms. Allocated memory is still 1.2 GB. Free memory was 952.9 MB in the beginning and 949.8 MB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 11.5 GB. [2018-11-10 05:14:10,735 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 167.62 ms. Allocated memory is still 1.0 GB. Free memory was 959.1 MB in the beginning and 948.4 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 26.26 ms. Allocated memory is still 1.0 GB. Free memory is still 948.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 15.82 ms. Allocated memory is still 1.0 GB. Free memory was 948.4 MB in the beginning and 945.7 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 197.50 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 138.9 MB). Free memory was 945.7 MB in the beginning and 1.1 GB in the end (delta: -183.6 MB). Peak memory consumption was 19.9 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 4205.23 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 952.9 MB in the end (delta: 176.4 MB). Peak memory consumption was 176.4 MB. Max. memory is 11.5 GB. * Witness Printer took 41.50 ms. Allocated memory is still 1.2 GB. Free memory was 952.9 MB in the beginning and 949.8 MB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 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 22 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 4.1s and 4 iterations. TraceHistogramMax:4. Analysis of lassos took 3.2s. Construction of modules took 0.1s. Büchi inclusion checks took 0.6s. 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 26 states and ocurred in iteration 2. Nontrivial modules had stage [2, 0, 0, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/2 HoareTripleCheckerStatistics: 50 SDtfs, 68 SDslu, 113 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: 123ms VariablesStem: 1 VariablesLoop: 2 DisjunctsStem: 1 DisjunctsLoop: 2 SupportingInvariants: 4 MotzkinApplications: 16 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 14 LassoNonterminationAnalysisSatUnbounded: 2 LassoNonterminationAnalysisUnsat: 2 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 1.4s - 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@1cc5b517=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@3400f70b=1, \result=0, \result=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@1322963b=0, \old(x)=1, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@6ea43620=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] RET return 1; [L15] 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] RET return 1; [L15] g(x - 1) End of lasso representation. RESULT: Ultimate proved your program to be incorrect! Received shutdown request...