./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 5842f4b8 Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_348251c1-4b27-4fac-9674-1b3fc276d8b2/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_348251c1-4b27-4fac-9674-1b3fc276d8b2/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_348251c1-4b27-4fac-9674-1b3fc276d8b2/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_348251c1-4b27-4fac-9674-1b3fc276d8b2/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_348251c1-4b27-4fac-9674-1b3fc276d8b2/bin-2019/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_348251c1-4b27-4fac-9674-1b3fc276d8b2/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 0.1.23-5842f4b [2018-11-18 16:06:42,442 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-18 16:06:42,443 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-18 16:06:42,449 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-18 16:06:42,449 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-18 16:06:42,449 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-18 16:06:42,450 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-18 16:06:42,451 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-18 16:06:42,452 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-18 16:06:42,453 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-18 16:06:42,454 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-18 16:06:42,454 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-18 16:06:42,454 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-18 16:06:42,455 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-18 16:06:42,455 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-18 16:06:42,456 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-18 16:06:42,456 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-18 16:06:42,458 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-18 16:06:42,459 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-18 16:06:42,460 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-18 16:06:42,460 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-18 16:06:42,461 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-18 16:06:42,463 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-18 16:06:42,463 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-18 16:06:42,463 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-18 16:06:42,463 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-18 16:06:42,464 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-18 16:06:42,464 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-18 16:06:42,465 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-18 16:06:42,466 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-18 16:06:42,466 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-18 16:06:42,466 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-18 16:06:42,466 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-18 16:06:42,467 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-18 16:06:42,467 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-18 16:06:42,468 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-18 16:06:42,468 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_348251c1-4b27-4fac-9674-1b3fc276d8b2/bin-2019/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf [2018-11-18 16:06:42,476 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-18 16:06:42,476 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-18 16:06:42,476 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-18 16:06:42,477 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-18 16:06:42,477 INFO L133 SettingsManager]: * Use SBE=true [2018-11-18 16:06:42,477 INFO L131 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2018-11-18 16:06:42,477 INFO L133 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2018-11-18 16:06:42,477 INFO L133 SettingsManager]: * Use old map elimination=false [2018-11-18 16:06:42,477 INFO L133 SettingsManager]: * Use external solver (rank synthesis)=false [2018-11-18 16:06:42,477 INFO L133 SettingsManager]: * Use only trivial implications for array writes=true [2018-11-18 16:06:42,478 INFO L133 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2018-11-18 16:06:42,478 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-18 16:06:42,478 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-11-18 16:06:42,478 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-18 16:06:42,478 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-18 16:06:42,478 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2018-11-18 16:06:42,478 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2018-11-18 16:06:42,479 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2018-11-18 16:06:42,479 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-18 16:06:42,479 INFO L133 SettingsManager]: * Assume nondeterminstic values are in range=false [2018-11-18 16:06:42,480 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-18 16:06:42,481 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2018-11-18 16:06:42,481 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-18 16:06:42,481 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-18 16:06:42,481 INFO L133 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2018-11-18 16:06:42,481 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-18 16:06:42,481 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-18 16:06:42,481 INFO L133 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2018-11-18 16:06:42,482 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-11-18 16:06:42,482 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_348251c1-4b27-4fac-9674-1b3fc276d8b2/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 [2018-11-18 16:06:42,507 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-18 16:06:42,516 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-18 16:06:42,518 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-18 16:06:42,519 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-18 16:06:42,520 INFO L276 PluginConnector]: CDTParser initialized [2018-11-18 16:06:42,520 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_348251c1-4b27-4fac-9674-1b3fc276d8b2/bin-2019/uautomizer/../../sv-benchmarks/c/termination-crafted/NestedRecursion_2b_true-no-overflow_false-termination_true-valid-memsafety.c [2018-11-18 16:06:42,559 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_348251c1-4b27-4fac-9674-1b3fc276d8b2/bin-2019/uautomizer/data/e444cc305/8653ffcf402b4f269a4b00c1f043c381/FLAG6a0947b0d [2018-11-18 16:06:42,951 INFO L307 CDTParser]: Found 1 translation units. [2018-11-18 16:06:42,951 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_348251c1-4b27-4fac-9674-1b3fc276d8b2/sv-benchmarks/c/termination-crafted/NestedRecursion_2b_true-no-overflow_false-termination_true-valid-memsafety.c [2018-11-18 16:06:42,956 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_348251c1-4b27-4fac-9674-1b3fc276d8b2/bin-2019/uautomizer/data/e444cc305/8653ffcf402b4f269a4b00c1f043c381/FLAG6a0947b0d [2018-11-18 16:06:42,966 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_348251c1-4b27-4fac-9674-1b3fc276d8b2/bin-2019/uautomizer/data/e444cc305/8653ffcf402b4f269a4b00c1f043c381 [2018-11-18 16:06:42,969 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-18 16:06:42,970 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-18 16:06:42,970 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-18 16:06:42,970 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-18 16:06:42,973 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-18 16:06:42,974 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 04:06:42" (1/1) ... [2018-11-18 16:06:42,976 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e013f19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 04:06:42, skipping insertion in model container [2018-11-18 16:06:42,976 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 04:06:42" (1/1) ... [2018-11-18 16:06:42,984 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-18 16:06:42,997 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-18 16:06:43,099 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 16:06:43,101 INFO L191 MainTranslator]: Completed pre-run [2018-11-18 16:06:43,112 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 16:06:43,120 INFO L195 MainTranslator]: Completed translation [2018-11-18 16:06:43,121 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 04:06:43 WrapperNode [2018-11-18 16:06:43,121 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-18 16:06:43,121 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-18 16:06:43,121 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-18 16:06:43,121 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-18 16:06:43,126 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 04:06:43" (1/1) ... [2018-11-18 16:06:43,130 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 04:06:43" (1/1) ... [2018-11-18 16:06:43,141 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-18 16:06:43,141 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-18 16:06:43,141 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-18 16:06:43,141 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-18 16:06:43,146 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 04:06:43" (1/1) ... [2018-11-18 16:06:43,146 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 04:06:43" (1/1) ... [2018-11-18 16:06:43,147 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 04:06:43" (1/1) ... [2018-11-18 16:06:43,147 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 04:06:43" (1/1) ... [2018-11-18 16:06:43,148 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 04:06:43" (1/1) ... [2018-11-18 16:06:43,149 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 04:06:43" (1/1) ... [2018-11-18 16:06:43,150 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 04:06:43" (1/1) ... [2018-11-18 16:06:43,150 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-18 16:06:43,150 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-18 16:06:43,150 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-18 16:06:43,150 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-18 16:06:43,151 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 04:06:43" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_348251c1-4b27-4fac-9674-1b3fc276d8b2/bin-2019/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 16:06:43,226 INFO L130 BoogieDeclarations]: Found specification of procedure g [2018-11-18 16:06:43,227 INFO L138 BoogieDeclarations]: Found implementation of procedure g [2018-11-18 16:06:43,227 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-18 16:06:43,227 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-18 16:06:43,304 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-18 16:06:43,304 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 04:06:43 BoogieIcfgContainer [2018-11-18 16:06:43,304 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-18 16:06:43,305 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2018-11-18 16:06:43,305 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2018-11-18 16:06:43,307 INFO L276 PluginConnector]: BuchiAutomizer initialized [2018-11-18 16:06:43,307 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-11-18 16:06:43,308 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 18.11 04:06:42" (1/3) ... [2018-11-18 16:06:43,308 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@701f707a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 18.11 04:06:43, skipping insertion in model container [2018-11-18 16:06:43,308 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-11-18 16:06:43,308 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 04:06:43" (2/3) ... [2018-11-18 16:06:43,309 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@701f707a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 18.11 04:06:43, skipping insertion in model container [2018-11-18 16:06:43,309 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-11-18 16:06:43,309 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 04:06:43" (3/3) ... [2018-11-18 16:06:43,310 INFO L375 chiAutomizerObserver]: Analyzing ICFG NestedRecursion_2b_true-no-overflow_false-termination_true-valid-memsafety.c [2018-11-18 16:06:43,354 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-18 16:06:43,354 INFO L374 BuchiCegarLoop]: Interprodecural is true [2018-11-18 16:06:43,354 INFO L375 BuchiCegarLoop]: Hoare is false [2018-11-18 16:06:43,354 INFO L376 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2018-11-18 16:06:43,354 INFO L377 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-18 16:06:43,355 INFO L378 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-18 16:06:43,355 INFO L379 BuchiCegarLoop]: Difference is false [2018-11-18 16:06:43,355 INFO L380 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-18 16:06:43,355 INFO L383 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2018-11-18 16:06:43,366 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 15 states. [2018-11-18 16:06:43,384 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2018-11-18 16:06:43,384 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-18 16:06:43,384 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-18 16:06:43,389 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2018-11-18 16:06:43,389 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2018-11-18 16:06:43,389 INFO L442 BuchiCegarLoop]: ======== Iteration 1============ [2018-11-18 16:06:43,389 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 15 states. [2018-11-18 16:06:43,390 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2018-11-18 16:06:43,390 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-18 16:06:43,391 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-18 16:06:43,391 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2018-11-18 16:06:43,391 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2018-11-18 16:06:43,395 INFO L794 eck$LassoCheckResult]: Stem: 11#ULTIMATE.startENTRYtrue assume { :begin_inline_ULTIMATE.init } true; 9#L-1true assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res;havoc main_#t~nondet2, main_#t~ret3, main_~x~0;main_~x~0 := main_#t~nondet2;havoc main_#t~nondet2; 7#L20true assume !(main_~x~0 < 0); 10#L21true call main_#t~ret3 := g(main_~x~0);< 12#gENTRYtrue [2018-11-18 16:06:43,396 INFO L796 eck$LassoCheckResult]: Loop: 12#gENTRYtrue ~x := #in~x; 3#L12true assume !(0 == ~x); 14#L15true call #t~ret0 := g(~x - 1);< 12#gENTRYtrue [2018-11-18 16:06:43,399 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 16:06:43,399 INFO L82 PathProgramCache]: Analyzing trace with hash 1202733, now seen corresponding path program 1 times [2018-11-18 16:06:43,400 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 16:06:43,401 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 16:06:43,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:06:43,437 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 16:06:43,437 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:06:43,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 16:06:43,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 16:06:43,463 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 16:06:43,463 INFO L82 PathProgramCache]: Analyzing trace with hash 29937, now seen corresponding path program 1 times [2018-11-18 16:06:43,463 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 16:06:43,463 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 16:06:43,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:06:43,464 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 16:06:43,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:06:43,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 16:06:43,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 16:06:43,472 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 16:06:43,472 INFO L82 PathProgramCache]: Analyzing trace with hash 1470880581, now seen corresponding path program 1 times [2018-11-18 16:06:43,472 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 16:06:43,472 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 16:06:43,473 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:06:43,473 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 16:06:43,474 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:06:43,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 16:06:43,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 16:06:43,537 INFO L216 LassoAnalysis]: Preferences: [2018-11-18 16:06:43,537 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-18 16:06:43,538 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-18 16:06:43,538 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-18 16:06:43,538 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-18 16:06:43,538 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 16:06:43,538 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-18 16:06:43,538 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-18 16:06:43,538 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_2b_true-no-overflow_false-termination_true-valid-memsafety.c_Iteration1_Loop [2018-11-18 16:06:43,539 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-18 16:06:43,539 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-18 16:06:43,551 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 16:06:43,557 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 16:06:43,561 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 16:06:43,563 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 16:06:43,565 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 16:06:43,636 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-18 16:06:43,637 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_348251c1-4b27-4fac-9674-1b3fc276d8b2/bin-2019/uautomizer/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 16:06:43,646 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 16:06:43,646 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 16:06:43,652 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 16:06:43,652 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_~x=0} Honda state: {g_~x=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_348251c1-4b27-4fac-9674-1b3fc276d8b2/bin-2019/uautomizer/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 16:06:43,668 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 16:06:43,668 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 16:06:43,678 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 16:06:43,678 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#t~ret1=0} Honda state: {g_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_348251c1-4b27-4fac-9674-1b3fc276d8b2/bin-2019/uautomizer/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 16:06:43,702 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 16:06:43,702 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 16:06:43,704 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 16:06:43,704 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#res=0} Honda state: {g_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_348251c1-4b27-4fac-9674-1b3fc276d8b2/bin-2019/uautomizer/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 16:06:43,719 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 16:06:43,719 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 16:06:43,721 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 16:06:43,721 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#t~ret0=0} Honda state: {g_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_348251c1-4b27-4fac-9674-1b3fc276d8b2/bin-2019/uautomizer/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 16:06:43,738 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 16:06:43,738 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_348251c1-4b27-4fac-9674-1b3fc276d8b2/bin-2019/uautomizer/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 16:06:43,755 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-18 16:06:43,755 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 16:06:43,766 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 16:06:43,767 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#in~x=-1} Honda state: {g_#in~x=-1} Generalized eigenvectors: [{g_#in~x=0}, {g_#in~x=-1}, {g_#in~x=0}] Lambdas: [8, 1, 8] Nus: [0, 0] [2018-11-18 16:06:43,802 INFO L216 LassoAnalysis]: Preferences: [2018-11-18 16:06:43,802 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-18 16:06:43,802 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-18 16:06:43,802 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-18 16:06:43,802 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-18 16:06:43,802 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 16:06:43,803 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-18 16:06:43,803 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-18 16:06:43,803 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_2b_true-no-overflow_false-termination_true-valid-memsafety.c_Iteration1_Lasso [2018-11-18 16:06:43,803 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-18 16:06:43,803 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-18 16:06:43,804 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 16:06:43,808 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 16:06:43,810 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 16:06:43,813 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 16:06:43,817 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 16:06:43,821 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 16:06:43,823 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 16:06:43,824 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 16:06:43,828 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 16:06:43,829 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 16:06:43,876 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-18 16:06:43,876 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_348251c1-4b27-4fac-9674-1b3fc276d8b2/bin-2019/uautomizer/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 16:06:43,890 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 16:06:43,890 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 16:06:43,893 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 16:06:43,893 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_#res=0} Honda state: {ULTIMATE.start_main_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_348251c1-4b27-4fac-9674-1b3fc276d8b2/bin-2019/uautomizer/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 16:06:43,909 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 16:06:43,909 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 16:06:43,913 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 16:06:43,913 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#t~ret1=0} Honda state: {g_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_348251c1-4b27-4fac-9674-1b3fc276d8b2/bin-2019/uautomizer/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 16:06:43,928 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 16:06:43,929 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 16:06:43,931 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 16:06:43,931 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#res=0} Honda state: {g_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_348251c1-4b27-4fac-9674-1b3fc276d8b2/bin-2019/uautomizer/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 16:06:43,946 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 16:06:43,946 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 16:06:43,948 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 16:06:43,948 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#t~ret0=0} Honda state: {g_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_348251c1-4b27-4fac-9674-1b3fc276d8b2/bin-2019/uautomizer/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 16:06:43,965 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 16:06:43,965 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 16:06:43,967 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 16:06:43,967 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_#t~ret4=0} Honda state: {ULTIMATE.start_#t~ret4=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_348251c1-4b27-4fac-9674-1b3fc276d8b2/bin-2019/uautomizer/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 16:06:43,982 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 16:06:43,982 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 16:06:43,984 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 16:06:43,984 INFO L448 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_348251c1-4b27-4fac-9674-1b3fc276d8b2/bin-2019/uautomizer/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 16:06:44,000 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 16:06:44,000 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 16:06:44,002 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 16:06:44,003 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_#t~nondet2=0} Honda state: {ULTIMATE.start_main_#t~nondet2=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_348251c1-4b27-4fac-9674-1b3fc276d8b2/bin-2019/uautomizer/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 16:06:44,018 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 16:06:44,018 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_348251c1-4b27-4fac-9674-1b3fc276d8b2/bin-2019/uautomizer/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 16:06:44,035 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-18 16:06:44,035 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 16:06:44,058 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-18 16:06:44,059 INFO L216 LassoAnalysis]: Preferences: [2018-11-18 16:06:44,059 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-18 16:06:44,059 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-18 16:06:44,059 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-18 16:06:44,059 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-18 16:06:44,059 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 16:06:44,059 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-18 16:06:44,059 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-18 16:06:44,059 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_2b_true-no-overflow_false-termination_true-valid-memsafety.c_Iteration1_Lasso [2018-11-18 16:06:44,059 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-18 16:06:44,059 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-18 16:06:44,061 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 16:06:44,065 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 16:06:44,066 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 16:06:44,067 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 16:06:44,069 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 16:06:44,073 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 16:06:44,074 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 16:06:44,075 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 16:06:44,077 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 16:06:44,078 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 16:06:44,118 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-18 16:06:44,122 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-18 16:06:44,123 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-18 16:06:44,124 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 16:06:44,124 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 16:06:44,125 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 16:06:44,125 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 16:06:44,125 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 16:06:44,126 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 16:06:44,127 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 16:06:44,129 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-18 16:06:44,129 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-18 16:06:44,130 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 16:06:44,130 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 16:06:44,130 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 16:06:44,130 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 16:06:44,130 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 16:06:44,131 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 16:06:44,131 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 16:06:44,132 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-18 16:06:44,133 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-18 16:06:44,133 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 16:06:44,133 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 16:06:44,134 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 16:06:44,134 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 16:06:44,134 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 16:06:44,134 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 16:06:44,134 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 16:06:44,136 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-18 16:06:44,136 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-18 16:06:44,136 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 16:06:44,137 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 16:06:44,137 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 16:06:44,137 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 16:06:44,137 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 16:06:44,138 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 16:06:44,138 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 16:06:44,139 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-18 16:06:44,139 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-18 16:06:44,140 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 16:06:44,140 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 16:06:44,140 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 16:06:44,140 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 16:06:44,140 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 16:06:44,141 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 16:06:44,141 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 16:06:44,141 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-18 16:06:44,142 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-18 16:06:44,142 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 16:06:44,142 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 16:06:44,143 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 16:06:44,143 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 16:06:44,143 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 16:06:44,143 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 16:06:44,143 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 16:06:44,144 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-18 16:06:44,145 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-18 16:06:44,145 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 16:06:44,145 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 16:06:44,145 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 16:06:44,145 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 16:06:44,146 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 16:06:44,146 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 16:06:44,146 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 16:06:44,147 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-18 16:06:44,147 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-18 16:06:44,148 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 16:06:44,148 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 16:06:44,148 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 16:06:44,148 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 16:06:44,148 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 16:06:44,149 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 16:06:44,149 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 16:06:44,150 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-18 16:06:44,150 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-18 16:06:44,151 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 16:06:44,151 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 16:06:44,151 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 16:06:44,151 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 16:06:44,151 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 16:06:44,152 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 16:06:44,152 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 16:06:44,153 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-18 16:06:44,153 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-18 16:06:44,153 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 16:06:44,154 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 16:06:44,154 INFO L206 nArgumentSynthesizer]: 2 loop disjuncts [2018-11-18 16:06:44,154 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 16:06:44,160 INFO L402 nArgumentSynthesizer]: We have 16 Motzkin's Theorem applications. [2018-11-18 16:06:44,161 INFO L403 nArgumentSynthesizer]: A total of 4 supporting invariants were added. [2018-11-18 16:06:44,222 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-18 16:06:44,248 INFO L443 ModelExtractionUtils]: Simplification made 7 calls to the SMT solver. [2018-11-18 16:06:44,248 INFO L444 ModelExtractionUtils]: 4 out of 11 variables were initially zero. Simplification set additionally 4 variables to zero. [2018-11-18 16:06:44,250 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-18 16:06:44,253 INFO L440 nArgumentSynthesizer]: Removed 3 redundant supporting invariants from a total of 4. [2018-11-18 16:06:44,254 INFO L518 LassoAnalysis]: Proved termination. [2018-11-18 16:06:44,254 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(g_#in~x) = 1*g_#in~x Supporting invariants [1*g_#in~x >= 0] [2018-11-18 16:06:44,262 INFO L297 tatePredicateManager]: 0 out of 1 supporting invariants were superfluous and have been removed [2018-11-18 16:06:44,297 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 16:06:44,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 16:06:44,310 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 16:06:44,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 16:06:44,335 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 16:06:44,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 16:06:44,383 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 [2018-11-18 16:06:44,384 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 15 states. Second operand 5 states. [2018-11-18 16:06:44,519 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. [2018-11-18 16:06:44,520 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 [2018-11-18 16:06:44,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-11-18 16:06:44,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 12 transitions. [2018-11-18 16:06:44,523 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 12 transitions. Stem has 4 letters. Loop has 3 letters. [2018-11-18 16:06:44,524 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 16:06:44,524 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 12 transitions. Stem has 7 letters. Loop has 3 letters. [2018-11-18 16:06:44,524 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 16:06:44,524 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 12 transitions. Stem has 4 letters. Loop has 6 letters. [2018-11-18 16:06:44,525 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 16:06:44,525 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 36 states and 43 transitions. [2018-11-18 16:06:44,528 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2018-11-18 16:06:44,532 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 36 states to 20 states and 26 transitions. [2018-11-18 16:06:44,533 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 14 [2018-11-18 16:06:44,533 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 15 [2018-11-18 16:06:44,533 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 26 transitions. [2018-11-18 16:06:44,534 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-18 16:06:44,535 INFO L705 BuchiCegarLoop]: Abstraction has 20 states and 26 transitions. [2018-11-18 16:06:44,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states and 26 transitions. [2018-11-18 16:06:44,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2018-11-18 16:06:44,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-11-18 16:06:44,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2018-11-18 16:06:44,552 INFO L728 BuchiCegarLoop]: Abstraction has 18 states and 22 transitions. [2018-11-18 16:06:44,552 INFO L608 BuchiCegarLoop]: Abstraction has 18 states and 22 transitions. [2018-11-18 16:06:44,552 INFO L442 BuchiCegarLoop]: ======== Iteration 2============ [2018-11-18 16:06:44,553 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 18 states and 22 transitions. [2018-11-18 16:06:44,553 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2018-11-18 16:06:44,553 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-18 16:06:44,553 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-18 16:06:44,554 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 16:06:44,554 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1] [2018-11-18 16:06:44,554 INFO L794 eck$LassoCheckResult]: Stem: 127#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 119#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res;havoc main_#t~nondet2, main_#t~ret3, main_~x~0;main_~x~0 := main_#t~nondet2;havoc main_#t~nondet2; 120#L20 assume !(main_~x~0 < 0); 125#L21 call main_#t~ret3 := g(main_~x~0);< 126#gENTRY ~x := #in~x; 124#L12 assume !(0 == ~x); 122#L15 call #t~ret0 := g(~x - 1);< 128#gENTRY ~x := #in~x; 121#L12 assume 0 == ~x;#res := 1; 123#gFINAL assume true; 129#gEXIT >#23#return; 131#L15-1 [2018-11-18 16:06:44,554 INFO L796 eck$LassoCheckResult]: Loop: 131#L15-1 call #t~ret1 := g(1 + #t~ret0);< 132#gENTRY ~x := #in~x; 135#L12 assume !(0 == ~x); 130#L15 call #t~ret0 := g(~x - 1);< 132#gENTRY ~x := #in~x; 135#L12 assume 0 == ~x;#res := 1; 134#gFINAL assume true; 136#gEXIT >#23#return; 131#L15-1 [2018-11-18 16:06:44,554 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 16:06:44,555 INFO L82 PathProgramCache]: Analyzing trace with hash -1676493545, now seen corresponding path program 1 times [2018-11-18 16:06:44,555 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 16:06:44,555 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 16:06:44,555 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:06:44,555 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 16:06:44,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:06:44,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 16:06:44,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 16:06:44,563 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 16:06:44,563 INFO L82 PathProgramCache]: Analyzing trace with hash 1500125133, now seen corresponding path program 1 times [2018-11-18 16:06:44,563 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 16:06:44,563 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 16:06:44,564 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:06:44,564 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 16:06:44,564 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:06:44,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 16:06:44,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 16:06:44,569 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 16:06:44,570 INFO L82 PathProgramCache]: Analyzing trace with hash 122773219, now seen corresponding path program 1 times [2018-11-18 16:06:44,570 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 16:06:44,570 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 16:06:44,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:06:44,571 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 16:06:44,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:06:44,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 16:06:44,639 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-18 16:06:44,640 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 16:06:44,640 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_348251c1-4b27-4fac-9674-1b3fc276d8b2/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 [2018-11-18 16:06:44,646 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 16:06:44,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 16:06:44,653 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 16:06:44,660 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-18 16:06:44,675 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 16:06:44,675 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-11-18 16:06:44,753 INFO L216 LassoAnalysis]: Preferences: [2018-11-18 16:06:44,753 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-18 16:06:44,753 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-18 16:06:44,753 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-18 16:06:44,753 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-18 16:06:44,753 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 16:06:44,754 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-18 16:06:44,754 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-18 16:06:44,754 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_2b_true-no-overflow_false-termination_true-valid-memsafety.c_Iteration2_Loop [2018-11-18 16:06:44,754 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-18 16:06:44,754 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-18 16:06:44,755 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 16:06:44,765 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 16:06:44,766 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 16:06:44,790 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-18 16:06:44,790 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_348251c1-4b27-4fac-9674-1b3fc276d8b2/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 [2018-11-18 16:06:44,791 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 16:06:44,792 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_348251c1-4b27-4fac-9674-1b3fc276d8b2/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 [2018-11-18 16:06:44,813 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-18 16:06:44,813 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 16:06:45,715 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-18 16:06:45,716 INFO L216 LassoAnalysis]: Preferences: [2018-11-18 16:06:45,716 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-18 16:06:45,716 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-18 16:06:45,716 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-18 16:06:45,717 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-18 16:06:45,717 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 16:06:45,717 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-18 16:06:45,717 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-18 16:06:45,717 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_2b_true-no-overflow_false-termination_true-valid-memsafety.c_Iteration2_Loop [2018-11-18 16:06:45,717 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-18 16:06:45,717 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-18 16:06:45,718 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 16:06:45,719 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 16:06:45,724 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 16:06:45,746 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-18 16:06:45,746 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-18 16:06:45,747 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-18 16:06:45,747 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 16:06:45,747 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 16:06:45,748 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 16:06:45,748 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 16:06:45,748 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 16:06:45,748 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 16:06:45,748 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 16:06:45,749 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-18 16:06:45,749 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-18 16:06:45,750 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 16:06:45,750 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 16:06:45,750 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 16:06:45,750 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 16:06:45,750 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 16:06:45,751 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 16:06:45,751 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 16:06:45,754 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-18 16:06:45,755 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-11-18 16:06:45,755 INFO L444 ModelExtractionUtils]: 2 out of 5 variables were initially zero. Simplification set additionally 0 variables to zero. [2018-11-18 16:06:45,756 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-18 16:06:45,756 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-18 16:06:45,756 INFO L518 LassoAnalysis]: Proved termination. [2018-11-18 16:06:45,756 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(g_#t~ret0) = -2*g_#t~ret0 + 1 Supporting invariants [] [2018-11-18 16:06:45,756 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-18 16:06:45,777 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 16:06:45,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 16:06:45,787 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 16:06:45,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 16:06:45,824 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 16:06:45,878 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 16:06:45,878 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 [2018-11-18 16:06:45,879 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 18 states and 22 transitions. cyclomatic complexity: 6 Second operand 8 states. [2018-11-18 16:06:46,065 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. [2018-11-18 16:06:46,065 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 [2018-11-18 16:06:46,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-11-18 16:06:46,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 37 transitions. [2018-11-18 16:06:46,067 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 37 transitions. Stem has 11 letters. Loop has 8 letters. [2018-11-18 16:06:46,068 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 16:06:46,068 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 37 transitions. Stem has 19 letters. Loop has 8 letters. [2018-11-18 16:06:46,068 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 16:06:46,068 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 37 transitions. Stem has 11 letters. Loop has 16 letters. [2018-11-18 16:06:46,068 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 16:06:46,069 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 83 states and 121 transitions. [2018-11-18 16:06:46,072 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 8 [2018-11-18 16:06:46,074 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 83 states to 59 states and 82 transitions. [2018-11-18 16:06:46,074 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 45 [2018-11-18 16:06:46,074 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 46 [2018-11-18 16:06:46,074 INFO L73 IsDeterministic]: Start isDeterministic. Operand 59 states and 82 transitions. [2018-11-18 16:06:46,074 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-18 16:06:46,074 INFO L705 BuchiCegarLoop]: Abstraction has 59 states and 82 transitions. [2018-11-18 16:06:46,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states and 82 transitions. [2018-11-18 16:06:46,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 53. [2018-11-18 16:06:46,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-11-18 16:06:46,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 72 transitions. [2018-11-18 16:06:46,079 INFO L728 BuchiCegarLoop]: Abstraction has 53 states and 72 transitions. [2018-11-18 16:06:46,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-18 16:06:46,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-11-18 16:06:46,082 INFO L87 Difference]: Start difference. First operand 53 states and 72 transitions. Second operand 8 states. [2018-11-18 16:06:46,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 16:06:46,121 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2018-11-18 16:06:46,122 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-18 16:06:46,122 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 40 states and 45 transitions. [2018-11-18 16:06:46,123 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2018-11-18 16:06:46,124 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 40 states to 31 states and 35 transitions. [2018-11-18 16:06:46,124 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 26 [2018-11-18 16:06:46,124 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 26 [2018-11-18 16:06:46,124 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 35 transitions. [2018-11-18 16:06:46,125 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-18 16:06:46,125 INFO L705 BuchiCegarLoop]: Abstraction has 31 states and 35 transitions. [2018-11-18 16:06:46,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states and 35 transitions. [2018-11-18 16:06:46,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2018-11-18 16:06:46,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-11-18 16:06:46,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2018-11-18 16:06:46,127 INFO L728 BuchiCegarLoop]: Abstraction has 26 states and 28 transitions. [2018-11-18 16:06:46,127 INFO L608 BuchiCegarLoop]: Abstraction has 26 states and 28 transitions. [2018-11-18 16:06:46,127 INFO L442 BuchiCegarLoop]: ======== Iteration 3============ [2018-11-18 16:06:46,127 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 26 states and 28 transitions. [2018-11-18 16:06:46,127 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2018-11-18 16:06:46,127 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-18 16:06:46,127 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-18 16:06:46,128 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 16:06:46,128 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2018-11-18 16:06:46,128 INFO L794 eck$LassoCheckResult]: Stem: 509#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 500#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res;havoc main_#t~nondet2, main_#t~ret3, main_~x~0;main_~x~0 := main_#t~nondet2;havoc main_#t~nondet2; 501#L20 assume !(main_~x~0 < 0); 502#L21 call main_#t~ret3 := g(main_~x~0);< 503#gENTRY ~x := #in~x; 507#L12 assume !(0 == ~x); 508#L15 call #t~ret0 := g(~x - 1);< 513#gENTRY ~x := #in~x; 514#L12 assume 0 == ~x;#res := 1; 521#gFINAL assume true; 520#gEXIT >#23#return; 518#L15-1 call #t~ret1 := g(1 + #t~ret0);< 525#gENTRY ~x := #in~x; 524#L12 assume !(0 == ~x); 505#L15 call #t~ret0 := g(~x - 1);< 519#gENTRY ~x := #in~x; 504#L12 assume !(0 == ~x); 506#L15 [2018-11-18 16:06:46,128 INFO L796 eck$LassoCheckResult]: Loop: 506#L15 call #t~ret0 := g(~x - 1);< 522#gENTRY ~x := #in~x; 523#L12 assume !(0 == ~x); 506#L15 [2018-11-18 16:06:46,128 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 16:06:46,128 INFO L82 PathProgramCache]: Analyzing trace with hash -1443446059, now seen corresponding path program 2 times [2018-11-18 16:06:46,128 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 16:06:46,128 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 16:06:46,129 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:06:46,129 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 16:06:46,129 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:06:46,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 16:06:46,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 16:06:46,137 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 16:06:46,137 INFO L82 PathProgramCache]: Analyzing trace with hash 50937, now seen corresponding path program 2 times [2018-11-18 16:06:46,137 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 16:06:46,137 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 16:06:46,137 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:06:46,137 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 16:06:46,138 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:06:46,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 16:06:46,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 16:06:46,140 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 16:06:46,140 INFO L82 PathProgramCache]: Analyzing trace with hash -488954971, now seen corresponding path program 3 times [2018-11-18 16:06:46,140 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 16:06:46,141 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 16:06:46,141 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:06:46,141 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 16:06:46,141 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:06:46,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 16:06:46,200 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-18 16:06:46,200 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 16:06:46,200 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_348251c1-4b27-4fac-9674-1b3fc276d8b2/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 [2018-11-18 16:06:46,209 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-18 16:06:46,215 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-11-18 16:06:46,215 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 16:06:46,216 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 16:06:46,230 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-18 16:06:46,245 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 16:06:46,245 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-11-18 16:06:46,263 INFO L216 LassoAnalysis]: Preferences: [2018-11-18 16:06:46,263 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-18 16:06:46,263 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-18 16:06:46,263 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-18 16:06:46,263 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-18 16:06:46,263 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 16:06:46,263 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-18 16:06:46,264 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-18 16:06:46,264 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_2b_true-no-overflow_false-termination_true-valid-memsafety.c_Iteration3_Loop [2018-11-18 16:06:46,264 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-18 16:06:46,264 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-18 16:06:46,264 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 16:06:46,268 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 16:06:46,269 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 16:06:46,270 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 16:06:46,292 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-18 16:06:46,292 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_348251c1-4b27-4fac-9674-1b3fc276d8b2/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 [2018-11-18 16:06:46,302 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 16:06:46,302 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_348251c1-4b27-4fac-9674-1b3fc276d8b2/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 [2018-11-18 16:06:46,322 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-18 16:06:46,322 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 16:06:46,444 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 16:06:46,444 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#in~x=-8, g_~x=-8} Honda state: {g_#in~x=-8, g_~x=-8} Generalized eigenvectors: [{g_#in~x=0, g_~x=0}, {g_#in~x=-1, g_~x=-1}, {g_#in~x=0, g_~x=0}] Lambdas: [8, 1, 3] Nus: [0, 0] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_348251c1-4b27-4fac-9674-1b3fc276d8b2/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 [2018-11-18 16:06:46,460 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 16:06:46,460 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 16:06:46,462 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 16:06:46,462 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#t~ret1=0} Honda state: {g_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_348251c1-4b27-4fac-9674-1b3fc276d8b2/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 [2018-11-18 16:06:46,477 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 16:06:46,477 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 16:06:46,479 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 16:06:46,479 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#res=0} Honda state: {g_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_348251c1-4b27-4fac-9674-1b3fc276d8b2/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 [2018-11-18 16:06:46,494 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 16:06:46,494 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 16:06:46,496 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 16:06:46,496 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#t~ret0=0} Honda state: {g_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2018-11-18 16:06:46,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-18 16:06:46,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-11-18 16:06:46,510 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. cyclomatic complexity: 4 Second operand 10 states. [2018-11-18 16:06:46,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 16:06:46,599 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2018-11-18 16:06:46,599 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-18 16:06:46,599 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 28 states and 29 transitions. [2018-11-18 16:06:46,600 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2018-11-18 16:06:46,600 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 28 states to 28 states and 29 transitions. [2018-11-18 16:06:46,600 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 25 [2018-11-18 16:06:46,601 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 25 [2018-11-18 16:06:46,601 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 29 transitions. [2018-11-18 16:06:46,601 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-18 16:06:46,601 INFO L705 BuchiCegarLoop]: Abstraction has 28 states and 29 transitions. [2018-11-18 16:06:46,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states and 29 transitions. [2018-11-18 16:06:46,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 22. [2018-11-18 16:06:46,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-11-18 16:06:46,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2018-11-18 16:06:46,602 INFO L728 BuchiCegarLoop]: Abstraction has 22 states and 23 transitions. [2018-11-18 16:06:46,602 INFO L608 BuchiCegarLoop]: Abstraction has 22 states and 23 transitions. [2018-11-18 16:06:46,602 INFO L442 BuchiCegarLoop]: ======== Iteration 4============ [2018-11-18 16:06:46,603 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 22 states and 23 transitions. [2018-11-18 16:06:46,603 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2018-11-18 16:06:46,603 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-18 16:06:46,603 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-18 16:06:46,603 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 16:06:46,604 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [3, 2, 2, 1, 1, 1, 1] [2018-11-18 16:06:46,604 INFO L794 eck$LassoCheckResult]: Stem: 647#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 638#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res;havoc main_#t~nondet2, main_#t~ret3, main_~x~0;main_~x~0 := main_#t~nondet2;havoc main_#t~nondet2; 639#L20 assume !(main_~x~0 < 0); 640#L21 call main_#t~ret3 := g(main_~x~0);< 641#gENTRY ~x := #in~x; 645#L12 assume !(0 == ~x); 646#L15 call #t~ret0 := g(~x - 1);< 650#gENTRY ~x := #in~x; 651#L12 assume 0 == ~x;#res := 1; 652#gFINAL assume true; 653#gEXIT >#23#return; 643#L15-1 [2018-11-18 16:06:46,604 INFO L796 eck$LassoCheckResult]: Loop: 643#L15-1 call #t~ret1 := g(1 + #t~ret0);< 654#gENTRY ~x := #in~x; 642#L12 assume !(0 == ~x); 644#L15 call #t~ret0 := g(~x - 1);< 648#gENTRY ~x := #in~x; 649#L12 assume !(0 == ~x); 656#L15 call #t~ret0 := g(~x - 1);< 657#gENTRY ~x := #in~x; 659#L12 assume 0 == ~x;#res := 1; 658#gFINAL assume true; 655#gEXIT >#23#return; 643#L15-1 [2018-11-18 16:06:46,604 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 16:06:46,604 INFO L82 PathProgramCache]: Analyzing trace with hash -1676493545, now seen corresponding path program 2 times [2018-11-18 16:06:46,604 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 16:06:46,604 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 16:06:46,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:06:46,605 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 16:06:46,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:06:46,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 16:06:46,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 16:06:46,609 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 16:06:46,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1133998729, now seen corresponding path program 2 times [2018-11-18 16:06:46,609 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 16:06:46,609 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 16:06:46,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:06:46,610 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 16:06:46,610 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:06:46,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 16:06:46,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 16:06:46,615 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 16:06:46,615 INFO L82 PathProgramCache]: Analyzing trace with hash -1734292557, now seen corresponding path program 4 times [2018-11-18 16:06:46,615 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 16:06:46,615 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 16:06:46,616 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:06:46,616 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 16:06:46,616 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 16:06:46,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 16:06:46,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 16:06:46,748 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 18.11 04:06:46 BoogieIcfgContainer [2018-11-18 16:06:46,748 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2018-11-18 16:06:46,748 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-18 16:06:46,748 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-18 16:06:46,748 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-18 16:06:46,749 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 04:06:43" (3/4) ... [2018-11-18 16:06:46,751 INFO L141 WitnessPrinter]: Generating witness for non-termination counterexample [2018-11-18 16:06:46,782 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_348251c1-4b27-4fac-9674-1b3fc276d8b2/bin-2019/uautomizer/witness.graphml [2018-11-18 16:06:46,782 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-18 16:06:46,783 INFO L168 Benchmark]: Toolchain (without parser) took 3813.72 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 142.6 MB). Free memory was 959.2 MB in the beginning and 942.4 MB in the end (delta: 16.8 MB). Peak memory consumption was 159.4 MB. Max. memory is 11.5 GB. [2018-11-18 16:06:46,783 INFO L168 Benchmark]: CDTParser took 0.14 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. [2018-11-18 16:06:46,784 INFO L168 Benchmark]: CACSL2BoogieTranslator took 150.69 ms. Allocated memory is still 1.0 GB. Free memory was 959.2 MB in the beginning and 948.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-18 16:06:46,784 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.83 ms. Allocated memory is still 1.0 GB. Free memory was 948.5 MB in the beginning and 945.8 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-18 16:06:46,784 INFO L168 Benchmark]: Boogie Preprocessor took 9.09 ms. Allocated memory is still 1.0 GB. Free memory is still 945.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 16:06:46,785 INFO L168 Benchmark]: RCFGBuilder took 154.21 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 142.6 MB). Free memory was 945.8 MB in the beginning and 1.1 GB in the end (delta: -185.2 MB). Peak memory consumption was 14.6 MB. Max. memory is 11.5 GB. [2018-11-18 16:06:46,785 INFO L168 Benchmark]: BuchiAutomizer took 3443.16 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 942.4 MB in the end (delta: 188.6 MB). Peak memory consumption was 188.6 MB. Max. memory is 11.5 GB. [2018-11-18 16:06:46,785 INFO L168 Benchmark]: Witness Printer took 33.93 ms. Allocated memory is still 1.2 GB. Free memory is still 942.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 16:06:46,787 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 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 150.69 ms. Allocated memory is still 1.0 GB. Free memory was 959.2 MB in the beginning and 948.5 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 19.83 ms. Allocated memory is still 1.0 GB. Free memory was 948.5 MB in the beginning and 945.8 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 9.09 ms. Allocated memory is still 1.0 GB. Free memory is still 945.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 154.21 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 142.6 MB). Free memory was 945.8 MB in the beginning and 1.1 GB in the end (delta: -185.2 MB). Peak memory consumption was 14.6 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 3443.16 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 942.4 MB in the end (delta: 188.6 MB). Peak memory consumption was 188.6 MB. Max. memory is 11.5 GB. * Witness Printer took 33.93 ms. Allocated memory is still 1.2 GB. Free memory is still 942.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 4 terminating modules (2 trivial, 2 deterministic, 0 nondeterministic) and one nonterminating remainder module.One deterministic module has affine ranking function \old(x) and consists of 5 locations. One deterministic module has affine ranking function -2 * aux-g(x - 1)-aux + 1 and consists of 10 locations. 2 modules have a trivial ranking function, the largest among these consists of 10 locations. The remainder module has 22 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 3.4s and 4 iterations. TraceHistogramMax:4. Analysis of lassos took 2.6s. Construction of modules took 0.1s. Büchi inclusion checks took 0.5s. 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: 100ms VariablesStem: 1 VariablesLoop: 2 DisjunctsStem: 1 DisjunctsLoop: 2 SupportingInvariants: 4 MotzkinApplications: 16 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 14 LassoNonterminationAnalysisSatUnbounded: 2 LassoNonterminationAnalysisUnsat: 2 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 1.2s - 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@e5790bb=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@40f0dea3=1, \result=0, \result=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@4367c470=0, \old(x)=1, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@741a84a8=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...