./Ultimate.py --spec ../../sv-benchmarks/c/Termination.prp --file ../../sv-benchmarks/c/termination-crafted/NestedRecursion_1b_true-no-overflow_true-termination_true-valid-memsafety.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 5842f4b8 Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_5c5c3a43-3548-462f-8d99-046c1b0f09af/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_5c5c3a43-3548-462f-8d99-046c1b0f09af/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_5c5c3a43-3548-462f-8d99-046c1b0f09af/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_5c5c3a43-3548-462f-8d99-046c1b0f09af/bin-2019/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-crafted/NestedRecursion_1b_true-no-overflow_true-termination_true-valid-memsafety.c -s /tmp/vcloud-vcloud-master/worker/working_dir_5c5c3a43-3548-462f-8d99-046c1b0f09af/bin-2019/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_5c5c3a43-3548-462f-8d99-046c1b0f09af/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 cb528549fa76ae8087cf7043645dfa20323a0116 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-5842f4b [2018-11-18 10:04:08,959 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-18 10:04:08,962 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-18 10:04:08,972 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-18 10:04:08,972 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-18 10:04:08,973 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-18 10:04:08,974 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-18 10:04:08,975 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-18 10:04:08,979 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-18 10:04:08,980 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-18 10:04:08,982 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-18 10:04:08,982 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-18 10:04:08,983 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-18 10:04:08,983 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-18 10:04:08,984 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-18 10:04:08,987 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-18 10:04:08,988 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-18 10:04:08,998 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-18 10:04:08,999 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-18 10:04:09,000 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-18 10:04:09,001 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-18 10:04:09,002 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-18 10:04:09,003 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-18 10:04:09,003 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-18 10:04:09,004 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-18 10:04:09,004 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-18 10:04:09,010 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-18 10:04:09,011 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-18 10:04:09,011 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-18 10:04:09,012 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-18 10:04:09,012 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-18 10:04:09,015 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-18 10:04:09,015 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-18 10:04:09,016 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-18 10:04:09,016 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-18 10:04:09,017 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-18 10:04:09,017 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_5c5c3a43-3548-462f-8d99-046c1b0f09af/bin-2019/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf [2018-11-18 10:04:09,032 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-18 10:04:09,033 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-18 10:04:09,034 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-18 10:04:09,035 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-18 10:04:09,035 INFO L133 SettingsManager]: * Use SBE=true [2018-11-18 10:04:09,036 INFO L131 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2018-11-18 10:04:09,036 INFO L133 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2018-11-18 10:04:09,036 INFO L133 SettingsManager]: * Use old map elimination=false [2018-11-18 10:04:09,037 INFO L133 SettingsManager]: * Use external solver (rank synthesis)=false [2018-11-18 10:04:09,037 INFO L133 SettingsManager]: * Use only trivial implications for array writes=true [2018-11-18 10:04:09,037 INFO L133 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2018-11-18 10:04:09,037 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-18 10:04:09,037 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-11-18 10:04:09,037 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-18 10:04:09,038 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-18 10:04:09,038 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2018-11-18 10:04:09,038 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2018-11-18 10:04:09,038 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2018-11-18 10:04:09,038 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-18 10:04:09,038 INFO L133 SettingsManager]: * Assume nondeterminstic values are in range=false [2018-11-18 10:04:09,038 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-18 10:04:09,038 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2018-11-18 10:04:09,038 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-18 10:04:09,039 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-18 10:04:09,039 INFO L133 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2018-11-18 10:04:09,039 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-18 10:04:09,039 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-18 10:04:09,039 INFO L133 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2018-11-18 10:04:09,040 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-11-18 10:04:09,040 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_5c5c3a43-3548-462f-8d99-046c1b0f09af/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 -> cb528549fa76ae8087cf7043645dfa20323a0116 [2018-11-18 10:04:09,078 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-18 10:04:09,092 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-18 10:04:09,095 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-18 10:04:09,096 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-18 10:04:09,097 INFO L276 PluginConnector]: CDTParser initialized [2018-11-18 10:04:09,097 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_5c5c3a43-3548-462f-8d99-046c1b0f09af/bin-2019/uautomizer/../../sv-benchmarks/c/termination-crafted/NestedRecursion_1b_true-no-overflow_true-termination_true-valid-memsafety.c [2018-11-18 10:04:09,147 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_5c5c3a43-3548-462f-8d99-046c1b0f09af/bin-2019/uautomizer/data/580f39477/7af475560b334d64803ac4d2664b2a9f/FLAG870ba4825 [2018-11-18 10:04:09,520 INFO L307 CDTParser]: Found 1 translation units. [2018-11-18 10:04:09,520 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_5c5c3a43-3548-462f-8d99-046c1b0f09af/sv-benchmarks/c/termination-crafted/NestedRecursion_1b_true-no-overflow_true-termination_true-valid-memsafety.c [2018-11-18 10:04:09,532 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_5c5c3a43-3548-462f-8d99-046c1b0f09af/bin-2019/uautomizer/data/580f39477/7af475560b334d64803ac4d2664b2a9f/FLAG870ba4825 [2018-11-18 10:04:09,906 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_5c5c3a43-3548-462f-8d99-046c1b0f09af/bin-2019/uautomizer/data/580f39477/7af475560b334d64803ac4d2664b2a9f [2018-11-18 10:04:09,909 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-18 10:04:09,910 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-18 10:04:09,911 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-18 10:04:09,912 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-18 10:04:09,915 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-18 10:04:09,916 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 10:04:09" (1/1) ... [2018-11-18 10:04:09,919 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c36d387 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:04:09, skipping insertion in model container [2018-11-18 10:04:09,919 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 10:04:09" (1/1) ... [2018-11-18 10:04:09,929 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-18 10:04:09,943 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-18 10:04:10,125 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 10:04:10,129 INFO L191 MainTranslator]: Completed pre-run [2018-11-18 10:04:10,143 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-18 10:04:10,160 INFO L195 MainTranslator]: Completed translation [2018-11-18 10:04:10,161 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:04:10 WrapperNode [2018-11-18 10:04:10,161 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-18 10:04:10,162 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-18 10:04:10,162 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-18 10:04:10,168 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-18 10:04:10,184 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:04:10" (1/1) ... [2018-11-18 10:04:10,189 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:04:10" (1/1) ... [2018-11-18 10:04:10,208 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-18 10:04:10,221 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-18 10:04:10,221 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-18 10:04:10,221 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-18 10:04:10,230 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:04:10" (1/1) ... [2018-11-18 10:04:10,230 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:04:10" (1/1) ... [2018-11-18 10:04:10,230 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:04:10" (1/1) ... [2018-11-18 10:04:10,231 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:04:10" (1/1) ... [2018-11-18 10:04:10,232 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:04:10" (1/1) ... [2018-11-18 10:04:10,235 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:04:10" (1/1) ... [2018-11-18 10:04:10,236 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:04:10" (1/1) ... [2018-11-18 10:04:10,237 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-18 10:04:10,238 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-18 10:04:10,238 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-18 10:04:10,238 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-18 10:04:10,239 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:04:10" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5c5c3a43-3548-462f-8d99-046c1b0f09af/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 10:04:10,381 INFO L130 BoogieDeclarations]: Found specification of procedure rec1 [2018-11-18 10:04:10,381 INFO L138 BoogieDeclarations]: Found implementation of procedure rec1 [2018-11-18 10:04:10,381 INFO L130 BoogieDeclarations]: Found specification of procedure rec2 [2018-11-18 10:04:10,381 INFO L138 BoogieDeclarations]: Found implementation of procedure rec2 [2018-11-18 10:04:10,382 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-18 10:04:10,382 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-18 10:04:10,600 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-18 10:04:10,601 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 10:04:10 BoogieIcfgContainer [2018-11-18 10:04:10,601 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-18 10:04:10,601 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2018-11-18 10:04:10,602 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2018-11-18 10:04:10,605 INFO L276 PluginConnector]: BuchiAutomizer initialized [2018-11-18 10:04:10,606 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-11-18 10:04:10,606 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 18.11 10:04:09" (1/3) ... [2018-11-18 10:04:10,608 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@3126630b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 18.11 10:04:10, skipping insertion in model container [2018-11-18 10:04:10,608 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-11-18 10:04:10,608 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 10:04:10" (2/3) ... [2018-11-18 10:04:10,608 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@3126630b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 18.11 10:04:10, skipping insertion in model container [2018-11-18 10:04:10,608 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-11-18 10:04:10,610 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 10:04:10" (3/3) ... [2018-11-18 10:04:10,611 INFO L375 chiAutomizerObserver]: Analyzing ICFG NestedRecursion_1b_true-no-overflow_true-termination_true-valid-memsafety.c [2018-11-18 10:04:10,662 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-18 10:04:10,663 INFO L374 BuchiCegarLoop]: Interprodecural is true [2018-11-18 10:04:10,663 INFO L375 BuchiCegarLoop]: Hoare is false [2018-11-18 10:04:10,663 INFO L376 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2018-11-18 10:04:10,663 INFO L377 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-18 10:04:10,664 INFO L378 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-18 10:04:10,664 INFO L379 BuchiCegarLoop]: Difference is false [2018-11-18 10:04:10,664 INFO L380 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-18 10:04:10,664 INFO L383 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2018-11-18 10:04:10,677 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 22 states. [2018-11-18 10:04:10,699 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2018-11-18 10:04:10,699 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-18 10:04:10,699 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-18 10:04:10,706 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2018-11-18 10:04:10,706 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 10:04:10,706 INFO L442 BuchiCegarLoop]: ======== Iteration 1============ [2018-11-18 10:04:10,707 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 22 states. [2018-11-18 10:04:10,708 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2018-11-18 10:04:10,709 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-18 10:04:10,709 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-18 10:04:10,709 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2018-11-18 10:04:10,709 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 10:04:10,716 INFO L794 eck$LassoCheckResult]: Stem: 14#ULTIMATE.startENTRYtrue assume { :begin_inline_ULTIMATE.init } true; 12#L-1true assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 23#L25true call main_#t~ret6 := rec2(main_~x~0);< 3#rec2ENTRYtrue [2018-11-18 10:04:10,716 INFO L796 eck$LassoCheckResult]: Loop: 3#rec2ENTRYtrue ~j := #in~j; 21#L18true assume !(~j <= 0); 19#L20true call #t~ret3 := rec1(~j - 1);< 4#rec1ENTRYtrue ~i := #in~i; 9#L12true assume ~i <= 0;#res := 0; 5#rec1FINALtrue assume true; 13#rec1EXITtrue >#34#return; 24#L20-1true call #t~ret4 := rec2(#t~ret3);< 3#rec2ENTRYtrue [2018-11-18 10:04:10,721 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:04:10,729 INFO L82 PathProgramCache]: Analyzing trace with hash 48738, now seen corresponding path program 1 times [2018-11-18 10:04:10,731 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 10:04:10,731 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 10:04:10,781 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:04:10,782 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 10:04:10,782 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:04:10,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 10:04:10,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 10:04:10,817 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:04:10,818 INFO L82 PathProgramCache]: Analyzing trace with hash -1074209557, now seen corresponding path program 1 times [2018-11-18 10:04:10,818 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 10:04:10,818 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 10:04:10,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:04:10,819 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 10:04:10,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:04:10,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 10:04:10,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 10:04:10,839 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:04:10,839 INFO L82 PathProgramCache]: Analyzing trace with hash -1203131828, now seen corresponding path program 1 times [2018-11-18 10:04:10,840 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 10:04:10,840 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 10:04:10,841 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:04:10,841 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 10:04:10,841 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:04:10,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 10:04:10,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 10:04:11,307 INFO L216 LassoAnalysis]: Preferences: [2018-11-18 10:04:11,308 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-18 10:04:11,308 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-18 10:04:11,308 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-18 10:04:11,308 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-18 10:04:11,309 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 10:04:11,309 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-18 10:04:11,309 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-18 10:04:11,309 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration1_Loop [2018-11-18 10:04:11,309 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-18 10:04:11,309 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-18 10:04:11,328 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 10:04:11,358 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 10:04:11,384 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 10:04:11,411 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 10:04:11,437 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 10:04:11,850 WARN L180 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2018-11-18 10:04:11,856 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-18 10:04:11,857 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5c5c3a43-3548-462f-8d99-046c1b0f09af/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 10:04:11,864 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 10:04:11,864 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 10:04:11,887 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 10:04:11,887 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec2_~j=0} Honda state: {rec2_~j=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5c5c3a43-3548-462f-8d99-046c1b0f09af/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 10:04:11,914 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 10:04:11,914 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 10:04:11,919 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 10:04:11,919 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec2_#t~ret3=0} Honda state: {rec2_#t~ret3=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5c5c3a43-3548-462f-8d99-046c1b0f09af/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 10:04:11,947 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 10:04:11,947 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 10:04:11,969 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 10:04:11,969 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec2_#res=0} Honda state: {rec2_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5c5c3a43-3548-462f-8d99-046c1b0f09af/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 10:04:11,995 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 10:04:11,995 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 10:04:12,005 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 10:04:12,005 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec2_#t~ret4=0} Honda state: {rec2_#t~ret4=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5c5c3a43-3548-462f-8d99-046c1b0f09af/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 10:04:12,031 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 10:04:12,032 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5c5c3a43-3548-462f-8d99-046c1b0f09af/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 10:04:12,070 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-18 10:04:12,070 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 10:04:12,075 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-18 10:04:12,098 INFO L216 LassoAnalysis]: Preferences: [2018-11-18 10:04:12,098 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-18 10:04:12,099 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-18 10:04:12,099 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-18 10:04:12,099 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-18 10:04:12,099 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 10:04:12,099 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-18 10:04:12,099 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-18 10:04:12,099 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration1_Loop [2018-11-18 10:04:12,099 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-18 10:04:12,099 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-18 10:04:12,100 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 10:04:12,134 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 10:04:12,173 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 10:04:12,193 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 10:04:12,233 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 10:04:12,497 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-18 10:04:12,501 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-18 10:04:12,503 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 10:04:12,504 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 10:04:12,504 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 10:04:12,505 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 10:04:12,505 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 10:04:12,506 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 10:04:12,507 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 10:04:12,507 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 10:04:12,511 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-18 10:04:12,511 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 10:04:12,511 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 10:04:12,512 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 10:04:12,512 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 10:04:12,512 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 10:04:12,512 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 10:04:12,514 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 10:04:12,514 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 10:04:12,515 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-18 10:04:12,515 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 10:04:12,516 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 10:04:12,516 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 10:04:12,516 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 10:04:12,516 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 10:04:12,516 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 10:04:12,517 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 10:04:12,517 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 10:04:12,518 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-18 10:04:12,518 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 10:04:12,519 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 10:04:12,519 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 10:04:12,519 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 10:04:12,519 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 10:04:12,519 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 10:04:12,520 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 10:04:12,520 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 10:04:12,524 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-18 10:04:12,528 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-11-18 10:04:12,528 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-11-18 10:04:12,530 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-18 10:04:12,530 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-18 10:04:12,530 INFO L518 LassoAnalysis]: Proved termination. [2018-11-18 10:04:12,530 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec2_#in~j) = 1*rec2_#in~j Supporting invariants [] [2018-11-18 10:04:12,531 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-18 10:04:12,614 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:04:12,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:04:12,668 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 10:04:12,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:04:12,722 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 10:04:13,125 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 10:04:13,140 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 6 loop predicates [2018-11-18 10:04:13,141 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 22 states. Second operand 7 states. [2018-11-18 10:04:14,533 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 22 states.. Second operand 7 states. Result 195 states and 280 transitions. Complement of second has 61 states. [2018-11-18 10:04:14,535 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 11 states 1 stem states 9 non-accepting loop states 1 accepting loop states [2018-11-18 10:04:14,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-11-18 10:04:14,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 58 transitions. [2018-11-18 10:04:14,540 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 58 transitions. Stem has 3 letters. Loop has 8 letters. [2018-11-18 10:04:14,544 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 10:04:14,544 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 58 transitions. Stem has 11 letters. Loop has 8 letters. [2018-11-18 10:04:14,545 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 10:04:14,545 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 58 transitions. Stem has 3 letters. Loop has 16 letters. [2018-11-18 10:04:14,545 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 10:04:14,546 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 195 states and 280 transitions. [2018-11-18 10:04:14,556 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2018-11-18 10:04:14,565 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 195 states to 83 states and 121 transitions. [2018-11-18 10:04:14,567 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 36 [2018-11-18 10:04:14,567 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 39 [2018-11-18 10:04:14,568 INFO L73 IsDeterministic]: Start isDeterministic. Operand 83 states and 121 transitions. [2018-11-18 10:04:14,568 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-18 10:04:14,568 INFO L705 BuchiCegarLoop]: Abstraction has 83 states and 121 transitions. [2018-11-18 10:04:14,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states and 121 transitions. [2018-11-18 10:04:14,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 56. [2018-11-18 10:04:14,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-11-18 10:04:14,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 84 transitions. [2018-11-18 10:04:14,601 INFO L728 BuchiCegarLoop]: Abstraction has 56 states and 84 transitions. [2018-11-18 10:04:14,601 INFO L608 BuchiCegarLoop]: Abstraction has 56 states and 84 transitions. [2018-11-18 10:04:14,602 INFO L442 BuchiCegarLoop]: ======== Iteration 2============ [2018-11-18 10:04:14,602 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 56 states and 84 transitions. [2018-11-18 10:04:14,603 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2018-11-18 10:04:14,603 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-18 10:04:14,603 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-18 10:04:14,604 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 10:04:14,604 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2018-11-18 10:04:14,604 INFO L794 eck$LassoCheckResult]: Stem: 388#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 384#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 350#L25 call main_#t~ret6 := rec2(main_~x~0);< 349#rec2ENTRY ~j := #in~j; 352#L18 assume !(~j <= 0); 382#L20 call #t~ret3 := rec1(~j - 1);< 396#rec1ENTRY ~i := #in~i; 381#L12 assume !(~i <= 0); 358#L14 call #t~ret0 := rec1(~i - 2);< 355#rec1ENTRY [2018-11-18 10:04:14,604 INFO L796 eck$LassoCheckResult]: Loop: 355#rec1ENTRY ~i := #in~i; 363#L12 assume !(~i <= 0); 361#L14 call #t~ret0 := rec1(~i - 2);< 355#rec1ENTRY [2018-11-18 10:04:14,604 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:04:14,605 INFO L82 PathProgramCache]: Analyzing trace with hash 838970620, now seen corresponding path program 1 times [2018-11-18 10:04:14,605 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 10:04:14,605 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 10:04:14,606 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:04:14,606 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 10:04:14,606 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:04:14,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 10:04:14,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 10:04:14,613 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:04:14,613 INFO L82 PathProgramCache]: Analyzing trace with hash 29942, now seen corresponding path program 1 times [2018-11-18 10:04:14,613 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 10:04:14,613 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 10:04:14,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:04:14,614 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 10:04:14,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:04:14,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 10:04:14,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 10:04:14,619 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:04:14,619 INFO L82 PathProgramCache]: Analyzing trace with hash 1359045147, now seen corresponding path program 2 times [2018-11-18 10:04:14,619 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 10:04:14,619 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 10:04:14,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:04:14,620 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 10:04:14,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:04:14,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 10:04:14,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 10:04:14,759 INFO L216 LassoAnalysis]: Preferences: [2018-11-18 10:04:14,759 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-18 10:04:14,759 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-18 10:04:14,760 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-18 10:04:14,760 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-18 10:04:14,760 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 10:04:14,760 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-18 10:04:14,760 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-18 10:04:14,760 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration2_Loop [2018-11-18 10:04:14,760 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-18 10:04:14,760 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-18 10:04:14,761 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 10:04:14,764 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 10:04:14,771 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 10:04:14,774 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 10:04:14,776 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 10:04:14,778 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 10:04:14,837 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-18 10:04:14,837 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5c5c3a43-3548-462f-8d99-046c1b0f09af/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 10:04:14,841 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 10:04:14,841 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 10:04:14,851 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 10:04:14,852 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#res=0} Honda state: {rec1_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5c5c3a43-3548-462f-8d99-046c1b0f09af/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 10:04:14,878 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 10:04:14,878 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 10:04:14,897 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 10:04:14,897 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_~i=0} Honda state: {rec1_~i=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5c5c3a43-3548-462f-8d99-046c1b0f09af/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 10:04:14,923 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 10:04:14,923 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 10:04:14,931 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 10:04:14,931 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret0=0} Honda state: {rec1_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5c5c3a43-3548-462f-8d99-046c1b0f09af/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 10:04:14,958 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 10:04:14,958 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 10:04:14,965 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 10:04:14,965 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret1=0} Honda state: {rec1_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5c5c3a43-3548-462f-8d99-046c1b0f09af/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 10:04:14,992 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 10:04:14,992 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 10:04:14,994 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 10:04:14,995 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret2=0} Honda state: {rec1_#t~ret2=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5c5c3a43-3548-462f-8d99-046c1b0f09af/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 10:04:15,025 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 10:04:15,025 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5c5c3a43-3548-462f-8d99-046c1b0f09af/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 10:04:15,055 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-18 10:04:15,055 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 10:04:15,083 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-18 10:04:15,084 INFO L216 LassoAnalysis]: Preferences: [2018-11-18 10:04:15,085 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-18 10:04:15,085 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-18 10:04:15,085 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-18 10:04:15,085 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-18 10:04:15,085 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 10:04:15,085 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-18 10:04:15,085 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-18 10:04:15,085 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration2_Loop [2018-11-18 10:04:15,085 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-18 10:04:15,086 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-18 10:04:15,087 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 10:04:15,090 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 10:04:15,092 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 10:04:15,094 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 10:04:15,097 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 10:04:15,103 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 10:04:15,142 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-18 10:04:15,142 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-18 10:04:15,143 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 10:04:15,143 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 10:04:15,143 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 10:04:15,143 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 10:04:15,144 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 10:04:15,144 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 10:04:15,144 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 10:04:15,144 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 10:04:15,146 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-18 10:04:15,146 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 10:04:15,147 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 10:04:15,147 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 10:04:15,147 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 10:04:15,147 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 10:04:15,147 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 10:04:15,148 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 10:04:15,148 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 10:04:15,149 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-18 10:04:15,149 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 10:04:15,150 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 10:04:15,150 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 10:04:15,150 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 10:04:15,150 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 10:04:15,150 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 10:04:15,151 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 10:04:15,151 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 10:04:15,154 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-18 10:04:15,154 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 10:04:15,155 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 10:04:15,155 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 10:04:15,155 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 10:04:15,155 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 10:04:15,155 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 10:04:15,156 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 10:04:15,156 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 10:04:15,157 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-18 10:04:15,157 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 10:04:15,157 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 10:04:15,158 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 10:04:15,158 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 10:04:15,158 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 10:04:15,158 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 10:04:15,159 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 10:04:15,159 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 10:04:15,166 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-18 10:04:15,169 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2018-11-18 10:04:15,169 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2018-11-18 10:04:15,169 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-18 10:04:15,169 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-18 10:04:15,170 INFO L518 LassoAnalysis]: Proved termination. [2018-11-18 10:04:15,170 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] [2018-11-18 10:04:15,170 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-18 10:04:15,219 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:04:15,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:04:15,244 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 10:04:15,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:04:15,272 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 10:04:15,358 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 10:04:15,358 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2018-11-18 10:04:15,358 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 56 states and 84 transitions. cyclomatic complexity: 32 Second operand 4 states. [2018-11-18 10:04:15,411 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 56 states and 84 transitions. cyclomatic complexity: 32. Second operand 4 states. Result 106 states and 150 transitions. Complement of second has 13 states. [2018-11-18 10:04:15,414 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2018-11-18 10:04:15,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2018-11-18 10:04:15,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 18 transitions. [2018-11-18 10:04:15,415 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 18 transitions. Stem has 9 letters. Loop has 3 letters. [2018-11-18 10:04:15,415 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 10:04:15,416 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 18 transitions. Stem has 12 letters. Loop has 3 letters. [2018-11-18 10:04:15,416 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 10:04:15,416 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 18 transitions. Stem has 9 letters. Loop has 6 letters. [2018-11-18 10:04:15,416 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 10:04:15,416 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 106 states and 150 transitions. [2018-11-18 10:04:15,419 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2018-11-18 10:04:15,422 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 106 states to 94 states and 138 transitions. [2018-11-18 10:04:15,422 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 38 [2018-11-18 10:04:15,422 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 40 [2018-11-18 10:04:15,422 INFO L73 IsDeterministic]: Start isDeterministic. Operand 94 states and 138 transitions. [2018-11-18 10:04:15,423 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-18 10:04:15,423 INFO L705 BuchiCegarLoop]: Abstraction has 94 states and 138 transitions. [2018-11-18 10:04:15,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states and 138 transitions. [2018-11-18 10:04:15,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 90. [2018-11-18 10:04:15,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2018-11-18 10:04:15,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 130 transitions. [2018-11-18 10:04:15,436 INFO L728 BuchiCegarLoop]: Abstraction has 90 states and 130 transitions. [2018-11-18 10:04:15,436 INFO L608 BuchiCegarLoop]: Abstraction has 90 states and 130 transitions. [2018-11-18 10:04:15,437 INFO L442 BuchiCegarLoop]: ======== Iteration 3============ [2018-11-18 10:04:15,437 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 90 states and 130 transitions. [2018-11-18 10:04:15,439 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2018-11-18 10:04:15,440 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-18 10:04:15,440 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-18 10:04:15,440 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 10:04:15,440 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2018-11-18 10:04:15,442 INFO L794 eck$LassoCheckResult]: Stem: 628#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 625#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 581#L25 call main_#t~ret6 := rec2(main_~x~0);< 580#rec2ENTRY ~j := #in~j; 582#L18 assume !(~j <= 0); 588#L20 call #t~ret3 := rec1(~j - 1);< 587#rec1ENTRY ~i := #in~i; 589#L12 assume !(~i <= 0); 614#L14 call #t~ret0 := rec1(~i - 2);< 629#rec1ENTRY ~i := #in~i; 647#L12 assume ~i <= 0;#res := 0; 645#rec1FINAL assume true; 626#rec1EXIT >#28#return; 600#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 602#rec1ENTRY [2018-11-18 10:04:15,442 INFO L796 eck$LassoCheckResult]: Loop: 602#rec1ENTRY ~i := #in~i; 644#L12 assume !(~i <= 0); 617#L14 call #t~ret0 := rec1(~i - 2);< 602#rec1ENTRY [2018-11-18 10:04:15,442 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:04:15,442 INFO L82 PathProgramCache]: Analyzing trace with hash 372282091, now seen corresponding path program 1 times [2018-11-18 10:04:15,442 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 10:04:15,443 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 10:04:15,443 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:04:15,444 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 10:04:15,444 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:04:15,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 10:04:15,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 10:04:15,466 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:04:15,466 INFO L82 PathProgramCache]: Analyzing trace with hash 29942, now seen corresponding path program 2 times [2018-11-18 10:04:15,467 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 10:04:15,467 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 10:04:15,467 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:04:15,467 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 10:04:15,467 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:04:15,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 10:04:15,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 10:04:15,473 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:04:15,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1050214860, now seen corresponding path program 2 times [2018-11-18 10:04:15,473 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 10:04:15,473 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 10:04:15,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:04:15,475 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 10:04:15,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:04:15,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:04:15,546 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-18 10:04:15,548 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-18 10:04:15,548 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-18 10:04:15,609 INFO L216 LassoAnalysis]: Preferences: [2018-11-18 10:04:15,609 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-18 10:04:15,609 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-18 10:04:15,609 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-18 10:04:15,609 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-18 10:04:15,609 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 10:04:15,609 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-18 10:04:15,609 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-18 10:04:15,610 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration3_Loop [2018-11-18 10:04:15,610 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-18 10:04:15,610 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-18 10:04:15,611 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 10:04:15,614 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 10:04:15,619 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 10:04:15,621 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 10:04:15,623 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 10:04:15,624 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 10:04:15,645 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-18 10:04:15,645 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5c5c3a43-3548-462f-8d99-046c1b0f09af/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 10:04:15,649 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 10:04:15,649 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 10:04:15,652 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 10:04:15,652 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret2=0} Honda state: {rec1_#t~ret2=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5c5c3a43-3548-462f-8d99-046c1b0f09af/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 10:04:15,678 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 10:04:15,678 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5c5c3a43-3548-462f-8d99-046c1b0f09af/bin-2019/uautomizer/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 10:04:15,706 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-18 10:04:15,706 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 10:04:15,733 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-18 10:04:15,735 INFO L216 LassoAnalysis]: Preferences: [2018-11-18 10:04:15,736 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-18 10:04:15,736 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-18 10:04:15,736 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-18 10:04:15,736 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-18 10:04:15,736 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 10:04:15,736 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-18 10:04:15,736 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-18 10:04:15,736 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration3_Loop [2018-11-18 10:04:15,737 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-18 10:04:15,737 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-18 10:04:15,738 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 10:04:15,750 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 10:04:15,786 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 10:04:15,788 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 10:04:15,790 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 10:04:15,792 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 10:04:15,831 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-18 10:04:15,831 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-18 10:04:15,832 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 10:04:15,832 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 10:04:15,832 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 10:04:15,833 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 10:04:15,833 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 10:04:15,833 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 10:04:15,833 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 10:04:15,833 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 10:04:15,834 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-18 10:04:15,835 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 10:04:15,835 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 10:04:15,835 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 10:04:15,835 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 10:04:15,835 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 10:04:15,835 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 10:04:15,836 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 10:04:15,836 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 10:04:15,843 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-18 10:04:15,845 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2018-11-18 10:04:15,845 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2018-11-18 10:04:15,845 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-18 10:04:15,845 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-18 10:04:15,845 INFO L518 LassoAnalysis]: Proved termination. [2018-11-18 10:04:15,845 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] [2018-11-18 10:04:15,846 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-18 10:04:15,869 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:04:15,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:04:15,896 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 10:04:15,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:04:15,931 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 10:04:15,951 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 10:04:15,951 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 10:04:15,952 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 90 states and 130 transitions. cyclomatic complexity: 47 Second operand 5 states. [2018-11-18 10:04:16,088 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 90 states and 130 transitions. cyclomatic complexity: 47. Second operand 5 states. Result 135 states and 194 transitions. Complement of second has 14 states. [2018-11-18 10:04:16,093 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 10:04:16,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-11-18 10:04:16,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 20 transitions. [2018-11-18 10:04:16,094 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 20 transitions. Stem has 14 letters. Loop has 3 letters. [2018-11-18 10:04:16,094 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 10:04:16,094 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 20 transitions. Stem has 17 letters. Loop has 3 letters. [2018-11-18 10:04:16,095 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 10:04:16,095 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 20 transitions. Stem has 14 letters. Loop has 6 letters. [2018-11-18 10:04:16,095 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 10:04:16,095 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 135 states and 194 transitions. [2018-11-18 10:04:16,101 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2018-11-18 10:04:16,104 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 135 states to 123 states and 182 transitions. [2018-11-18 10:04:16,104 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 49 [2018-11-18 10:04:16,105 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 51 [2018-11-18 10:04:16,106 INFO L73 IsDeterministic]: Start isDeterministic. Operand 123 states and 182 transitions. [2018-11-18 10:04:16,106 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-18 10:04:16,106 INFO L705 BuchiCegarLoop]: Abstraction has 123 states and 182 transitions. [2018-11-18 10:04:16,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states and 182 transitions. [2018-11-18 10:04:16,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 114. [2018-11-18 10:04:16,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-11-18 10:04:16,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 166 transitions. [2018-11-18 10:04:16,118 INFO L728 BuchiCegarLoop]: Abstraction has 114 states and 166 transitions. [2018-11-18 10:04:16,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-18 10:04:16,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-11-18 10:04:16,122 INFO L87 Difference]: Start difference. First operand 114 states and 166 transitions. Second operand 6 states. [2018-11-18 10:04:16,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 10:04:16,218 INFO L93 Difference]: Finished difference Result 124 states and 176 transitions. [2018-11-18 10:04:16,221 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-18 10:04:16,222 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 124 states and 176 transitions. [2018-11-18 10:04:16,224 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 11 [2018-11-18 10:04:16,226 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 124 states to 122 states and 174 transitions. [2018-11-18 10:04:16,226 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 56 [2018-11-18 10:04:16,226 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 56 [2018-11-18 10:04:16,226 INFO L73 IsDeterministic]: Start isDeterministic. Operand 122 states and 174 transitions. [2018-11-18 10:04:16,227 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-18 10:04:16,227 INFO L705 BuchiCegarLoop]: Abstraction has 122 states and 174 transitions. [2018-11-18 10:04:16,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states and 174 transitions. [2018-11-18 10:04:16,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 102. [2018-11-18 10:04:16,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2018-11-18 10:04:16,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 144 transitions. [2018-11-18 10:04:16,239 INFO L728 BuchiCegarLoop]: Abstraction has 102 states and 144 transitions. [2018-11-18 10:04:16,239 INFO L608 BuchiCegarLoop]: Abstraction has 102 states and 144 transitions. [2018-11-18 10:04:16,239 INFO L442 BuchiCegarLoop]: ======== Iteration 4============ [2018-11-18 10:04:16,239 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 102 states and 144 transitions. [2018-11-18 10:04:16,240 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2018-11-18 10:04:16,240 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-18 10:04:16,240 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-18 10:04:16,242 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 10:04:16,242 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2018-11-18 10:04:16,242 INFO L794 eck$LassoCheckResult]: Stem: 1187#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 1184#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 1185#L25 call main_#t~ret6 := rec2(main_~x~0);< 1194#rec2ENTRY ~j := #in~j; 1205#L18 assume !(~j <= 0); 1177#L20 call #t~ret3 := rec1(~j - 1);< 1204#rec1ENTRY ~i := #in~i; 1203#L12 assume !(~i <= 0); 1158#L14 call #t~ret0 := rec1(~i - 2);< 1200#rec1ENTRY ~i := #in~i; 1199#L12 assume !(~i <= 0); 1154#L14 call #t~ret0 := rec1(~i - 2);< 1198#rec1ENTRY ~i := #in~i; 1202#L12 assume ~i <= 0;#res := 0; 1153#rec1FINAL assume true; 1155#rec1EXIT >#28#return; 1147#L14-1 [2018-11-18 10:04:16,242 INFO L796 eck$LassoCheckResult]: Loop: 1147#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 1145#rec1ENTRY ~i := #in~i; 1148#L12 assume ~i <= 0;#res := 0; 1181#rec1FINAL assume true; 1233#rec1EXIT >#30#return; 1163#L14-2 call #t~ret2 := rec1(#t~ret1);< 1182#rec1ENTRY ~i := #in~i; 1226#L12 assume !(~i <= 0); 1159#L14 call #t~ret0 := rec1(~i - 2);< 1182#rec1ENTRY ~i := #in~i; 1226#L12 assume ~i <= 0;#res := 0; 1225#rec1FINAL assume true; 1224#rec1EXIT >#28#return; 1147#L14-1 [2018-11-18 10:04:16,242 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:04:16,242 INFO L82 PathProgramCache]: Analyzing trace with hash 1325197585, now seen corresponding path program 1 times [2018-11-18 10:04:16,242 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 10:04:16,243 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 10:04:16,243 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:04:16,243 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 10:04:16,244 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:04:16,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 10:04:16,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 10:04:16,264 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:04:16,265 INFO L82 PathProgramCache]: Analyzing trace with hash 949089090, now seen corresponding path program 1 times [2018-11-18 10:04:16,265 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 10:04:16,265 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 10:04:16,265 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:04:16,265 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 10:04:16,266 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:04:16,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:04:16,340 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-18 10:04:16,340 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 10:04:16,340 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5c5c3a43-3548-462f-8d99-046c1b0f09af/bin-2019/uautomizer/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 10:04:16,348 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 10:04:16,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:04:16,362 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 10:04:16,364 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-18 10:04:16,389 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-18 10:04:16,389 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 6 [2018-11-18 10:04:16,389 INFO L811 eck$LassoCheckResult]: loop already infeasible [2018-11-18 10:04:16,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-18 10:04:16,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-11-18 10:04:16,390 INFO L87 Difference]: Start difference. First operand 102 states and 144 transitions. cyclomatic complexity: 49 Second operand 6 states. [2018-11-18 10:04:16,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 10:04:16,463 INFO L93 Difference]: Finished difference Result 118 states and 162 transitions. [2018-11-18 10:04:16,463 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-18 10:04:16,463 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 118 states and 162 transitions. [2018-11-18 10:04:16,465 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2018-11-18 10:04:16,467 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 118 states to 118 states and 162 transitions. [2018-11-18 10:04:16,467 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 54 [2018-11-18 10:04:16,468 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 54 [2018-11-18 10:04:16,468 INFO L73 IsDeterministic]: Start isDeterministic. Operand 118 states and 162 transitions. [2018-11-18 10:04:16,468 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-18 10:04:16,468 INFO L705 BuchiCegarLoop]: Abstraction has 118 states and 162 transitions. [2018-11-18 10:04:16,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states and 162 transitions. [2018-11-18 10:04:16,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 114. [2018-11-18 10:04:16,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2018-11-18 10:04:16,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 158 transitions. [2018-11-18 10:04:16,477 INFO L728 BuchiCegarLoop]: Abstraction has 114 states and 158 transitions. [2018-11-18 10:04:16,477 INFO L608 BuchiCegarLoop]: Abstraction has 114 states and 158 transitions. [2018-11-18 10:04:16,477 INFO L442 BuchiCegarLoop]: ======== Iteration 5============ [2018-11-18 10:04:16,477 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 114 states and 158 transitions. [2018-11-18 10:04:16,478 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2018-11-18 10:04:16,478 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-18 10:04:16,478 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-18 10:04:16,479 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 10:04:16,479 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 10:04:16,480 INFO L794 eck$LassoCheckResult]: Stem: 1460#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 1458#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 1459#L25 call main_#t~ret6 := rec2(main_~x~0);< 1465#rec2ENTRY ~j := #in~j; 1477#L18 assume !(~j <= 0); 1450#L20 call #t~ret3 := rec1(~j - 1);< 1476#rec1ENTRY ~i := #in~i; 1475#L12 assume !(~i <= 0); 1430#L14 call #t~ret0 := rec1(~i - 2);< 1473#rec1ENTRY ~i := #in~i; 1474#L12 assume ~i <= 0;#res := 0; 1517#rec1FINAL assume true; 1516#rec1EXIT >#28#return; 1505#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 1438#rec1ENTRY ~i := #in~i; 1512#L12 assume ~i <= 0;#res := 0; 1511#rec1FINAL assume true; 1504#rec1EXIT >#30#return; 1417#L14-2 call #t~ret2 := rec1(#t~ret1);< 1416#rec1ENTRY ~i := #in~i; 1419#L12 assume ~i <= 0;#res := 0; 1515#rec1FINAL assume true; 1514#rec1EXIT >#32#return; 1449#L14-3 #res := 1 + #t~ret2;havoc #t~ret1;havoc #t~ret2;havoc #t~ret0; 1452#rec1FINAL assume true; 1470#rec1EXIT >#34#return; 1411#L20-1 [2018-11-18 10:04:16,480 INFO L796 eck$LassoCheckResult]: Loop: 1411#L20-1 call #t~ret4 := rec2(#t~ret3);< 1410#rec2ENTRY ~j := #in~j; 1412#L18 assume !(~j <= 0); 1432#L20 call #t~ret3 := rec1(~j - 1);< 1461#rec1ENTRY ~i := #in~i; 1510#L12 assume !(~i <= 0); 1435#L14 call #t~ret0 := rec1(~i - 2);< 1461#rec1ENTRY ~i := #in~i; 1510#L12 assume ~i <= 0;#res := 0; 1508#rec1FINAL assume true; 1506#rec1EXIT >#28#return; 1429#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 1438#rec1ENTRY ~i := #in~i; 1512#L12 assume ~i <= 0;#res := 0; 1511#rec1FINAL assume true; 1504#rec1EXIT >#30#return; 1418#L14-2 call #t~ret2 := rec1(#t~ret1);< 1416#rec1ENTRY ~i := #in~i; 1419#L12 assume ~i <= 0;#res := 0; 1515#rec1FINAL assume true; 1514#rec1EXIT >#32#return; 1469#L14-3 #res := 1 + #t~ret2;havoc #t~ret1;havoc #t~ret2;havoc #t~ret0; 1481#rec1FINAL assume true; 1468#rec1EXIT >#34#return; 1411#L20-1 [2018-11-18 10:04:16,480 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:04:16,480 INFO L82 PathProgramCache]: Analyzing trace with hash 1231361643, now seen corresponding path program 1 times [2018-11-18 10:04:16,480 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 10:04:16,480 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 10:04:16,481 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:04:16,481 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 10:04:16,481 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:04:16,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 10:04:16,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 10:04:16,492 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:04:16,492 INFO L82 PathProgramCache]: Analyzing trace with hash -1591101301, now seen corresponding path program 1 times [2018-11-18 10:04:16,492 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 10:04:16,492 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 10:04:16,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:04:16,493 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 10:04:16,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:04:16,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 10:04:16,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 10:04:16,504 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:04:16,504 INFO L82 PathProgramCache]: Analyzing trace with hash 774680821, now seen corresponding path program 1 times [2018-11-18 10:04:16,504 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 10:04:16,504 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 10:04:16,504 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:04:16,505 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 10:04:16,505 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:04:16,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:04:16,856 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 28 proven. 22 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2018-11-18 10:04:16,856 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 10:04:16,856 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5c5c3a43-3548-462f-8d99-046c1b0f09af/bin-2019/uautomizer/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 10:04:16,886 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 10:04:16,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:04:16,905 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 10:04:16,914 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 28 proven. 22 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2018-11-18 10:04:16,940 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 10:04:16,940 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-11-18 10:04:17,227 INFO L216 LassoAnalysis]: Preferences: [2018-11-18 10:04:17,227 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-18 10:04:17,227 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-18 10:04:17,227 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-18 10:04:17,227 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-18 10:04:17,227 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 10:04:17,227 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-18 10:04:17,228 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-18 10:04:17,228 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration5_Loop [2018-11-18 10:04:17,228 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-18 10:04:17,228 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-18 10:04:17,229 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 10:04:17,241 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 10:04:17,243 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 10:04:17,269 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-18 10:04:17,269 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5c5c3a43-3548-462f-8d99-046c1b0f09af/bin-2019/uautomizer/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 10:04:17,272 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 10:04:17,272 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5c5c3a43-3548-462f-8d99-046c1b0f09af/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 10:04:17,302 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-18 10:04:17,302 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 10:04:20,854 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-18 10:04:20,856 INFO L216 LassoAnalysis]: Preferences: [2018-11-18 10:04:20,856 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-18 10:04:20,856 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-18 10:04:20,857 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-18 10:04:20,857 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-18 10:04:20,857 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 10:04:20,857 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-18 10:04:20,857 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-18 10:04:20,857 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration5_Loop [2018-11-18 10:04:20,857 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-18 10:04:20,857 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-18 10:04:20,858 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 10:04:20,894 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 10:04:20,905 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 10:04:21,033 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-18 10:04:21,033 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-18 10:04:21,034 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 10:04:21,034 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 10:04:21,034 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 10:04:21,034 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 10:04:21,035 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 10:04:21,035 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 10:04:21,041 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 10:04:21,041 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 10:04:21,041 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-18 10:04:21,042 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 10:04:21,042 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 10:04:21,042 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 10:04:21,042 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 10:04:21,042 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 10:04:21,043 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 10:04:21,043 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 10:04:21,043 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 10:04:21,044 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-18 10:04:21,044 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 10:04:21,044 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 10:04:21,044 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 10:04:21,045 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 10:04:21,045 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 10:04:21,045 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 10:04:21,045 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 10:04:21,045 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 10:04:21,049 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-18 10:04:21,052 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-11-18 10:04:21,052 INFO L444 ModelExtractionUtils]: 2 out of 5 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-11-18 10:04:21,052 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-18 10:04:21,052 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-18 10:04:21,052 INFO L518 LassoAnalysis]: Proved termination. [2018-11-18 10:04:21,052 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec2_#t~ret3) = 1*rec2_#t~ret3 Supporting invariants [] [2018-11-18 10:04:21,053 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-18 10:04:21,193 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:04:21,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:04:21,236 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 10:04:21,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:04:21,349 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 10:04:21,740 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-11-18 10:04:21,740 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 9 loop predicates [2018-11-18 10:04:21,741 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 114 states and 158 transitions. cyclomatic complexity: 51 Second operand 11 states. [2018-11-18 10:04:23,277 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 114 states and 158 transitions. cyclomatic complexity: 51. Second operand 11 states. Result 585 states and 904 transitions. Complement of second has 45 states. [2018-11-18 10:04:23,278 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 11 states 2 stem states 8 non-accepting loop states 1 accepting loop states [2018-11-18 10:04:23,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-11-18 10:04:23,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 53 transitions. [2018-11-18 10:04:23,279 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 53 transitions. Stem has 26 letters. Loop has 24 letters. [2018-11-18 10:04:23,279 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 10:04:23,279 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 53 transitions. Stem has 50 letters. Loop has 24 letters. [2018-11-18 10:04:23,280 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 10:04:23,280 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 53 transitions. Stem has 26 letters. Loop has 48 letters. [2018-11-18 10:04:23,280 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 10:04:23,280 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 585 states and 904 transitions. [2018-11-18 10:04:23,291 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 14 [2018-11-18 10:04:23,300 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 585 states to 433 states and 650 transitions. [2018-11-18 10:04:23,300 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 141 [2018-11-18 10:04:23,300 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 142 [2018-11-18 10:04:23,301 INFO L73 IsDeterministic]: Start isDeterministic. Operand 433 states and 650 transitions. [2018-11-18 10:04:23,301 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-18 10:04:23,301 INFO L705 BuchiCegarLoop]: Abstraction has 433 states and 650 transitions. [2018-11-18 10:04:23,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states and 650 transitions. [2018-11-18 10:04:23,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 384. [2018-11-18 10:04:23,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 384 states. [2018-11-18 10:04:23,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 535 transitions. [2018-11-18 10:04:23,328 INFO L728 BuchiCegarLoop]: Abstraction has 384 states and 535 transitions. [2018-11-18 10:04:23,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-18 10:04:23,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2018-11-18 10:04:23,328 INFO L87 Difference]: Start difference. First operand 384 states and 535 transitions. Second operand 10 states. [2018-11-18 10:04:24,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 10:04:24,094 INFO L93 Difference]: Finished difference Result 443 states and 646 transitions. [2018-11-18 10:04:24,094 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-18 10:04:24,095 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 443 states and 646 transitions. [2018-11-18 10:04:24,101 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 14 [2018-11-18 10:04:24,107 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 443 states to 350 states and 496 transitions. [2018-11-18 10:04:24,107 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 132 [2018-11-18 10:04:24,107 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 136 [2018-11-18 10:04:24,107 INFO L73 IsDeterministic]: Start isDeterministic. Operand 350 states and 496 transitions. [2018-11-18 10:04:24,108 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-18 10:04:24,109 INFO L705 BuchiCegarLoop]: Abstraction has 350 states and 496 transitions. [2018-11-18 10:04:24,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states and 496 transitions. [2018-11-18 10:04:24,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 315. [2018-11-18 10:04:24,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 315 states. [2018-11-18 10:04:24,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 416 transitions. [2018-11-18 10:04:24,127 INFO L728 BuchiCegarLoop]: Abstraction has 315 states and 416 transitions. [2018-11-18 10:04:24,127 INFO L608 BuchiCegarLoop]: Abstraction has 315 states and 416 transitions. [2018-11-18 10:04:24,127 INFO L442 BuchiCegarLoop]: ======== Iteration 6============ [2018-11-18 10:04:24,127 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 315 states and 416 transitions. [2018-11-18 10:04:24,131 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 14 [2018-11-18 10:04:24,131 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-18 10:04:24,131 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-18 10:04:24,132 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [5, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 10:04:24,132 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2018-11-18 10:04:24,132 INFO L794 eck$LassoCheckResult]: Stem: 3397#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 3391#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 3392#L25 call main_#t~ret6 := rec2(main_~x~0);< 3410#rec2ENTRY ~j := #in~j; 3433#L18 assume !(~j <= 0); 3430#L20 call #t~ret3 := rec1(~j - 1);< 3431#rec1ENTRY ~i := #in~i; 3447#L12 assume !(~i <= 0); 3441#L14 call #t~ret0 := rec1(~i - 2);< 3446#rec1ENTRY ~i := #in~i; 3453#L12 assume ~i <= 0;#res := 0; 3481#rec1FINAL assume true; 3480#rec1EXIT >#28#return; 3473#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 3474#rec1ENTRY ~i := #in~i; 3478#L12 assume ~i <= 0;#res := 0; 3477#rec1FINAL assume true; 3472#rec1EXIT >#30#return; 3467#L14-2 call #t~ret2 := rec1(#t~ret1);< 3470#rec1ENTRY ~i := #in~i; 3476#L12 assume ~i <= 0;#res := 0; 3471#rec1FINAL assume true; 3469#rec1EXIT >#32#return; 3465#L14-3 #res := 1 + #t~ret2;havoc #t~ret1;havoc #t~ret2;havoc #t~ret0; 3504#rec1FINAL assume true; 3501#rec1EXIT >#34#return; 3407#L20-1 call #t~ret4 := rec2(#t~ret3);< 3408#rec2ENTRY ~j := #in~j; 3520#L18 assume !(~j <= 0); 3498#L20 call #t~ret3 := rec1(~j - 1);< 3417#rec1ENTRY ~i := #in~i; 3519#L12 assume !(~i <= 0); 3353#L14 call #t~ret0 := rec1(~i - 2);< 3387#rec1ENTRY [2018-11-18 10:04:24,133 INFO L796 eck$LassoCheckResult]: Loop: 3387#rec1ENTRY ~i := #in~i; 3518#L12 assume !(~i <= 0); 3366#L14 call #t~ret0 := rec1(~i - 2);< 3387#rec1ENTRY [2018-11-18 10:04:24,133 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:04:24,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1565705522, now seen corresponding path program 2 times [2018-11-18 10:04:24,133 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 10:04:24,133 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 10:04:24,134 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:04:24,134 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 10:04:24,134 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:04:24,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:04:24,434 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-11-18 10:04:24,434 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 10:04:24,434 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5c5c3a43-3548-462f-8d99-046c1b0f09af/bin-2019/uautomizer/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 10:04:24,461 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-18 10:04:24,475 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-18 10:04:24,475 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 10:04:24,477 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 10:04:24,482 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-11-18 10:04:24,507 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 10:04:24,507 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-11-18 10:04:24,508 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-11-18 10:04:24,508 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:04:24,508 INFO L82 PathProgramCache]: Analyzing trace with hash 29942, now seen corresponding path program 3 times [2018-11-18 10:04:24,508 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 10:04:24,508 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 10:04:24,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:04:24,509 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 10:04:24,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:04:24,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 10:04:24,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 10:04:24,548 INFO L216 LassoAnalysis]: Preferences: [2018-11-18 10:04:24,548 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-18 10:04:24,548 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-18 10:04:24,548 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-18 10:04:24,548 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-18 10:04:24,548 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 10:04:24,548 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-18 10:04:24,548 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-18 10:04:24,548 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration6_Loop [2018-11-18 10:04:24,548 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-18 10:04:24,549 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-18 10:04:24,549 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 10:04:24,557 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 10:04:24,579 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 10:04:24,585 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 10:04:24,589 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 10:04:24,597 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 10:04:24,717 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-18 10:04:24,717 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5c5c3a43-3548-462f-8d99-046c1b0f09af/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) [2018-11-18 10:04:24,723 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 10:04:24,723 INFO L163 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 10:04:24,729 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 10:04:24,729 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_~i=0} Honda state: {rec1_~i=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5c5c3a43-3548-462f-8d99-046c1b0f09af/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) [2018-11-18 10:04:24,755 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 10:04:24,755 INFO L163 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5c5c3a43-3548-462f-8d99-046c1b0f09af/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 10:04:24,790 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-18 10:04:24,790 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 10:04:24,815 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-18 10:04:24,816 INFO L216 LassoAnalysis]: Preferences: [2018-11-18 10:04:24,816 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-18 10:04:24,816 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-18 10:04:24,816 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-18 10:04:24,817 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-18 10:04:24,817 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 10:04:24,817 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-18 10:04:24,817 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-18 10:04:24,817 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration6_Loop [2018-11-18 10:04:24,817 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-18 10:04:24,817 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-18 10:04:24,818 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 10:04:24,837 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 10:04:24,854 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 10:04:24,857 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 10:04:24,868 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 10:04:24,870 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 10:04:24,891 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-18 10:04:24,891 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-18 10:04:24,891 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 10:04:24,892 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 10:04:24,892 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 10:04:24,892 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 10:04:24,892 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 10:04:24,892 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 10:04:24,893 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 10:04:24,893 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 10:04:24,894 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-18 10:04:24,894 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 10:04:24,895 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 10:04:24,895 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 10:04:24,895 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 10:04:24,895 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 10:04:24,895 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 10:04:24,895 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 10:04:24,896 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 10:04:24,906 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-18 10:04:24,907 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2018-11-18 10:04:24,907 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2018-11-18 10:04:24,908 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-18 10:04:24,908 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-18 10:04:24,908 INFO L518 LassoAnalysis]: Proved termination. [2018-11-18 10:04:24,908 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] [2018-11-18 10:04:24,908 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-18 10:04:24,929 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:04:24,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:04:24,980 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 10:04:25,285 WARN L180 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2018-11-18 10:04:25,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:04:25,327 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 10:04:25,361 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 10:04:25,362 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 10:04:25,362 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 315 states and 416 transitions. cyclomatic complexity: 114 Second operand 5 states. [2018-11-18 10:04:25,454 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 315 states and 416 transitions. cyclomatic complexity: 114. Second operand 5 states. Result 349 states and 456 transitions. Complement of second has 14 states. [2018-11-18 10:04:25,463 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 10:04:25,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-11-18 10:04:25,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 18 transitions. [2018-11-18 10:04:25,463 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 18 transitions. Stem has 33 letters. Loop has 3 letters. [2018-11-18 10:04:25,464 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 10:04:25,464 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-18 10:04:25,513 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:04:25,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:04:25,584 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 10:04:25,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:04:25,708 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 10:04:25,793 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 10:04:25,793 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 3 loop predicates [2018-11-18 10:04:25,793 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 315 states and 416 transitions. cyclomatic complexity: 114 Second operand 5 states. [2018-11-18 10:04:25,879 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 315 states and 416 transitions. cyclomatic complexity: 114. Second operand 5 states. Result 349 states and 456 transitions. Complement of second has 14 states. [2018-11-18 10:04:25,880 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 10:04:25,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-11-18 10:04:25,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 18 transitions. [2018-11-18 10:04:25,880 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 18 transitions. Stem has 33 letters. Loop has 3 letters. [2018-11-18 10:04:25,881 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 10:04:25,881 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-18 10:04:25,963 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:04:25,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:04:26,002 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 10:04:26,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:04:26,067 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 10:04:26,441 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 10:04:26,442 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2018-11-18 10:04:26,442 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 315 states and 416 transitions. cyclomatic complexity: 114 Second operand 5 states. [2018-11-18 10:04:27,091 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 315 states and 416 transitions. cyclomatic complexity: 114. Second operand 5 states. Result 486 states and 617 transitions. Complement of second has 16 states. [2018-11-18 10:04:27,092 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 10:04:27,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-11-18 10:04:27,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 25 transitions. [2018-11-18 10:04:27,093 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 25 transitions. Stem has 33 letters. Loop has 3 letters. [2018-11-18 10:04:27,093 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 10:04:27,093 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 25 transitions. Stem has 36 letters. Loop has 3 letters. [2018-11-18 10:04:27,093 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 10:04:27,093 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 25 transitions. Stem has 33 letters. Loop has 6 letters. [2018-11-18 10:04:27,094 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 10:04:27,094 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 486 states and 617 transitions. [2018-11-18 10:04:27,103 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 26 [2018-11-18 10:04:27,120 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 486 states to 396 states and 527 transitions. [2018-11-18 10:04:27,121 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 130 [2018-11-18 10:04:27,122 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 137 [2018-11-18 10:04:27,124 INFO L73 IsDeterministic]: Start isDeterministic. Operand 396 states and 527 transitions. [2018-11-18 10:04:27,125 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-18 10:04:27,125 INFO L705 BuchiCegarLoop]: Abstraction has 396 states and 527 transitions. [2018-11-18 10:04:27,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states and 527 transitions. [2018-11-18 10:04:27,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 352. [2018-11-18 10:04:27,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 352 states. [2018-11-18 10:04:27,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 457 transitions. [2018-11-18 10:04:27,156 INFO L728 BuchiCegarLoop]: Abstraction has 352 states and 457 transitions. [2018-11-18 10:04:27,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-18 10:04:27,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2018-11-18 10:04:27,157 INFO L87 Difference]: Start difference. First operand 352 states and 457 transitions. Second operand 10 states. [2018-11-18 10:04:27,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 10:04:27,894 INFO L93 Difference]: Finished difference Result 379 states and 514 transitions. [2018-11-18 10:04:27,902 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-18 10:04:27,903 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 379 states and 514 transitions. [2018-11-18 10:04:27,906 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 22 [2018-11-18 10:04:27,908 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 379 states to 105 states and 143 transitions. [2018-11-18 10:04:27,908 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 99 [2018-11-18 10:04:27,908 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 99 [2018-11-18 10:04:27,908 INFO L73 IsDeterministic]: Start isDeterministic. Operand 105 states and 143 transitions. [2018-11-18 10:04:27,911 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-18 10:04:27,911 INFO L705 BuchiCegarLoop]: Abstraction has 105 states and 143 transitions. [2018-11-18 10:04:27,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states and 143 transitions. [2018-11-18 10:04:27,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 87. [2018-11-18 10:04:27,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-11-18 10:04:27,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 107 transitions. [2018-11-18 10:04:27,915 INFO L728 BuchiCegarLoop]: Abstraction has 87 states and 107 transitions. [2018-11-18 10:04:27,915 INFO L608 BuchiCegarLoop]: Abstraction has 87 states and 107 transitions. [2018-11-18 10:04:27,915 INFO L442 BuchiCegarLoop]: ======== Iteration 7============ [2018-11-18 10:04:27,915 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 87 states and 107 transitions. [2018-11-18 10:04:27,916 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 22 [2018-11-18 10:04:27,916 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-18 10:04:27,916 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-18 10:04:27,916 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 10:04:27,920 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2018-11-18 10:04:27,920 INFO L794 eck$LassoCheckResult]: Stem: 6115#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 6113#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 6114#L25 call main_#t~ret6 := rec2(main_~x~0);< 6123#rec2ENTRY ~j := #in~j; 6147#L18 assume !(~j <= 0); 6144#L20 call #t~ret3 := rec1(~j - 1);< 6146#rec1ENTRY ~i := #in~i; 6145#L12 assume !(~i <= 0); 6112#L14 call #t~ret0 := rec1(~i - 2);< 6125#rec1ENTRY ~i := #in~i; 6096#L12 assume !(~i <= 0); 6095#L14 [2018-11-18 10:04:27,920 INFO L796 eck$LassoCheckResult]: Loop: 6095#L14 call #t~ret0 := rec1(~i - 2);< 6094#rec1ENTRY ~i := #in~i; 6096#L12 assume !(~i <= 0); 6095#L14 [2018-11-18 10:04:27,921 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:04:27,921 INFO L82 PathProgramCache]: Analyzing trace with hash -1203085824, now seen corresponding path program 3 times [2018-11-18 10:04:27,921 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 10:04:27,921 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 10:04:27,921 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:04:27,922 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 10:04:27,922 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:04:27,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 10:04:27,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 10:04:27,931 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:04:27,931 INFO L82 PathProgramCache]: Analyzing trace with hash 55742, now seen corresponding path program 4 times [2018-11-18 10:04:27,931 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 10:04:27,931 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 10:04:27,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:04:27,932 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 10:04:27,932 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:04:27,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 10:04:27,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 10:04:27,937 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:04:27,938 INFO L82 PathProgramCache]: Analyzing trace with hash 372328287, now seen corresponding path program 4 times [2018-11-18 10:04:27,938 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 10:04:27,938 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 10:04:27,938 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:04:27,938 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 10:04:27,938 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:04:27,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 10:04:27,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 10:04:28,018 INFO L216 LassoAnalysis]: Preferences: [2018-11-18 10:04:28,018 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-18 10:04:28,018 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-18 10:04:28,018 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-18 10:04:28,018 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-18 10:04:28,018 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 10:04:28,018 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-18 10:04:28,019 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-18 10:04:28,019 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration7_Loop [2018-11-18 10:04:28,019 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-18 10:04:28,019 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-18 10:04:28,019 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 10:04:28,034 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 10:04:28,036 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 10:04:28,037 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 10:04:28,038 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 10:04:28,056 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-18 10:04:28,056 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5c5c3a43-3548-462f-8d99-046c1b0f09af/bin-2019/uautomizer/z3 Starting monitored process 26 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 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 10:04:28,061 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 10:04:28,062 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5c5c3a43-3548-462f-8d99-046c1b0f09af/bin-2019/uautomizer/z3 Starting monitored process 27 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 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 10:04:28,082 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-18 10:04:28,082 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 10:04:32,459 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-18 10:04:32,461 INFO L216 LassoAnalysis]: Preferences: [2018-11-18 10:04:32,461 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-18 10:04:32,461 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-18 10:04:32,461 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-18 10:04:32,461 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-18 10:04:32,462 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 10:04:32,462 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-18 10:04:32,462 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-18 10:04:32,462 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration7_Loop [2018-11-18 10:04:32,462 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-18 10:04:32,462 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-18 10:04:32,462 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 10:04:32,493 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 10:04:32,495 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 10:04:32,509 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-18 10:04:32,511 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 10:04:32,625 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-18 10:04:32,625 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-18 10:04:32,626 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 10:04:32,626 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 10:04:32,626 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 10:04:32,626 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 10:04:32,626 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 10:04:32,627 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 10:04:32,627 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 10:04:32,627 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 10:04:32,630 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-18 10:04:32,632 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-11-18 10:04:32,632 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-11-18 10:04:32,632 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-18 10:04:32,632 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-18 10:04:32,632 INFO L518 LassoAnalysis]: Proved termination. [2018-11-18 10:04:32,633 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_~i) = 1*rec1_~i Supporting invariants [] [2018-11-18 10:04:32,633 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-18 10:04:32,736 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:04:32,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:04:32,750 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 10:04:32,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:04:32,758 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 10:04:32,817 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 10:04:32,817 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2018-11-18 10:04:32,817 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 87 states and 107 transitions. cyclomatic complexity: 23 Second operand 4 states. [2018-11-18 10:04:32,933 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 87 states and 107 transitions. cyclomatic complexity: 23. Second operand 4 states. Result 101 states and 125 transitions. Complement of second has 11 states. [2018-11-18 10:04:32,933 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 1 stem states 3 non-accepting loop states 1 accepting loop states [2018-11-18 10:04:32,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2018-11-18 10:04:32,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 14 transitions. [2018-11-18 10:04:32,934 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 14 transitions. Stem has 11 letters. Loop has 3 letters. [2018-11-18 10:04:32,934 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 10:04:32,934 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 14 transitions. Stem has 14 letters. Loop has 3 letters. [2018-11-18 10:04:32,935 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 10:04:32,935 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 14 transitions. Stem has 11 letters. Loop has 6 letters. [2018-11-18 10:04:32,935 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 10:04:32,935 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 101 states and 125 transitions. [2018-11-18 10:04:32,936 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 22 [2018-11-18 10:04:32,937 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 101 states to 95 states and 118 transitions. [2018-11-18 10:04:32,937 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 84 [2018-11-18 10:04:32,938 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 85 [2018-11-18 10:04:32,938 INFO L73 IsDeterministic]: Start isDeterministic. Operand 95 states and 118 transitions. [2018-11-18 10:04:32,938 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-18 10:04:32,938 INFO L705 BuchiCegarLoop]: Abstraction has 95 states and 118 transitions. [2018-11-18 10:04:32,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states and 118 transitions. [2018-11-18 10:04:32,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 93. [2018-11-18 10:04:32,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-11-18 10:04:32,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 115 transitions. [2018-11-18 10:04:32,942 INFO L728 BuchiCegarLoop]: Abstraction has 93 states and 115 transitions. [2018-11-18 10:04:32,942 INFO L608 BuchiCegarLoop]: Abstraction has 93 states and 115 transitions. [2018-11-18 10:04:32,942 INFO L442 BuchiCegarLoop]: ======== Iteration 8============ [2018-11-18 10:04:32,942 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 93 states and 115 transitions. [2018-11-18 10:04:32,943 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 22 [2018-11-18 10:04:32,943 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-18 10:04:32,943 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-18 10:04:32,944 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [5, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-18 10:04:32,944 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [5, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2018-11-18 10:04:32,944 INFO L794 eck$LassoCheckResult]: Stem: 6376#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 6373#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 6374#L25 call main_#t~ret6 := rec2(main_~x~0);< 6382#rec2ENTRY ~j := #in~j; 6380#L18 assume !(~j <= 0); 6381#L20 call #t~ret3 := rec1(~j - 1);< 6403#rec1ENTRY ~i := #in~i; 6404#L12 assume !(~i <= 0); 6368#L14 call #t~ret0 := rec1(~i - 2);< 6399#rec1ENTRY ~i := #in~i; 6438#L12 assume !(~i <= 0); 6353#L14 call #t~ret0 := rec1(~i - 2);< 6352#rec1ENTRY ~i := #in~i; 6354#L12 assume ~i <= 0;#res := 0; 6441#rec1FINAL assume true; 6409#rec1EXIT >#28#return; 6361#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 6367#rec1ENTRY ~i := #in~i; 6434#L12 assume ~i <= 0;#res := 0; 6431#rec1FINAL assume true; 6375#rec1EXIT >#30#return; 6371#L14-2 call #t~ret2 := rec1(#t~ret1);< 6372#rec1ENTRY ~i := #in~i; 6405#L12 assume ~i <= 0;#res := 0; 6402#rec1FINAL assume true; 6400#rec1EXIT >#32#return; 6369#L14-3 #res := 1 + #t~ret2;havoc #t~ret1;havoc #t~ret2;havoc #t~ret0; 6370#rec1FINAL assume true; 6398#rec1EXIT >#28#return; 6363#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 6397#rec1ENTRY [2018-11-18 10:04:32,944 INFO L796 eck$LassoCheckResult]: Loop: 6397#rec1ENTRY ~i := #in~i; 6406#L12 assume !(~i <= 0); 6362#L14 call #t~ret0 := rec1(~i - 2);< 6377#rec1ENTRY ~i := #in~i; 6357#L12 assume !(~i <= 0); 6356#L14 call #t~ret0 := rec1(~i - 2);< 6355#rec1ENTRY ~i := #in~i; 6358#L12 assume ~i <= 0;#res := 0; 6359#rec1FINAL assume true; 6360#rec1EXIT >#28#return; 6361#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 6367#rec1ENTRY ~i := #in~i; 6434#L12 assume ~i <= 0;#res := 0; 6431#rec1FINAL assume true; 6375#rec1EXIT >#30#return; 6371#L14-2 call #t~ret2 := rec1(#t~ret1);< 6372#rec1ENTRY ~i := #in~i; 6405#L12 assume ~i <= 0;#res := 0; 6402#rec1FINAL assume true; 6400#rec1EXIT >#32#return; 6369#L14-3 #res := 1 + #t~ret2;havoc #t~ret1;havoc #t~ret2;havoc #t~ret0; 6370#rec1FINAL assume true; 6398#rec1EXIT >#28#return; 6364#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 6397#rec1ENTRY [2018-11-18 10:04:32,944 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:04:32,944 INFO L82 PathProgramCache]: Analyzing trace with hash 1060897207, now seen corresponding path program 1 times [2018-11-18 10:04:32,953 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 10:04:32,953 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 10:04:32,954 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:04:32,954 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-18 10:04:32,954 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:04:32,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 10:04:32,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 10:04:32,966 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:04:32,966 INFO L82 PathProgramCache]: Analyzing trace with hash 245881341, now seen corresponding path program 1 times [2018-11-18 10:04:32,967 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 10:04:32,967 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 10:04:32,967 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:04:32,967 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 10:04:32,967 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:04:32,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 10:04:32,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-18 10:04:32,978 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:04:32,979 INFO L82 PathProgramCache]: Analyzing trace with hash -2071488077, now seen corresponding path program 2 times [2018-11-18 10:04:32,979 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-18 10:04:32,979 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-18 10:04:32,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:04:32,979 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-18 10:04:32,980 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-18 10:04:32,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:04:33,166 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 24 proven. 29 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2018-11-18 10:04:33,166 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-18 10:04:33,167 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5c5c3a43-3548-462f-8d99-046c1b0f09af/bin-2019/uautomizer/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-18 10:04:33,177 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-18 10:04:33,192 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-18 10:04:33,192 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-18 10:04:33,195 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 10:04:33,205 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 109 proven. 2 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2018-11-18 10:04:33,229 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-18 10:04:33,229 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-11-18 10:04:33,590 INFO L216 LassoAnalysis]: Preferences: [2018-11-18 10:04:33,590 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-18 10:04:33,591 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-18 10:04:33,591 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-18 10:04:33,591 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-18 10:04:33,591 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 10:04:33,591 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-18 10:04:33,591 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-18 10:04:33,591 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration8_Loop [2018-11-18 10:04:33,591 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-18 10:04:33,591 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-18 10:04:33,592 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 10:04:33,596 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 10:04:33,602 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 10:04:33,605 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 10:04:33,611 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 10:04:33,613 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 10:04:33,634 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-18 10:04:33,634 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5c5c3a43-3548-462f-8d99-046c1b0f09af/bin-2019/uautomizer/z3 Starting monitored process 29 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 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 10:04:33,638 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 10:04:33,638 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 10:04:33,640 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 10:04:33,640 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret0=0} Honda state: {rec1_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5c5c3a43-3548-462f-8d99-046c1b0f09af/bin-2019/uautomizer/z3 Starting monitored process 30 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 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 10:04:33,666 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 10:04:33,666 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 10:04:33,669 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 10:04:33,669 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#res=0} Honda state: {rec1_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5c5c3a43-3548-462f-8d99-046c1b0f09af/bin-2019/uautomizer/z3 Starting monitored process 31 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 31 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 10:04:33,695 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 10:04:33,696 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 10:04:33,709 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-18 10:04:33,709 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_~i=0} Honda state: {rec1_~i=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5c5c3a43-3548-462f-8d99-046c1b0f09af/bin-2019/uautomizer/z3 Starting monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2018-11-18 10:04:33,745 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-18 10:04:33,745 INFO L163 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5c5c3a43-3548-462f-8d99-046c1b0f09af/bin-2019/uautomizer/z3 Starting monitored process 33 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 33 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 10:04:33,794 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-18 10:04:33,794 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-18 10:04:33,798 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-18 10:04:33,820 INFO L216 LassoAnalysis]: Preferences: [2018-11-18 10:04:33,821 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-18 10:04:33,821 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-18 10:04:33,821 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-18 10:04:33,821 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-18 10:04:33,821 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-18 10:04:33,821 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-18 10:04:33,821 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-18 10:04:33,821 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration8_Loop [2018-11-18 10:04:33,821 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-18 10:04:33,821 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-18 10:04:33,822 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 10:04:33,827 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 10:04:33,829 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 10:04:33,861 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 10:04:33,869 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 10:04:33,877 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 10:04:33,966 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-18 10:04:33,966 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-18 10:04:33,966 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 10:04:33,967 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 10:04:33,967 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 10:04:33,967 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 10:04:33,967 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 10:04:33,967 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 10:04:33,968 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 10:04:33,968 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 10:04:33,968 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-18 10:04:33,968 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 10:04:33,969 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 10:04:33,969 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 10:04:33,969 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 10:04:33,969 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 10:04:33,969 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 10:04:33,969 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 10:04:33,969 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 10:04:33,970 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-18 10:04:33,970 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 10:04:33,970 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-18 10:04:33,971 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-18 10:04:33,971 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-18 10:04:33,971 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-18 10:04:33,971 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-18 10:04:33,971 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-18 10:04:33,971 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-18 10:04:33,989 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-18 10:04:33,990 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-11-18 10:04:33,991 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-11-18 10:04:33,991 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-18 10:04:33,991 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-18 10:04:33,991 INFO L518 LassoAnalysis]: Proved termination. [2018-11-18 10:04:33,991 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] [2018-11-18 10:04:33,991 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-18 10:04:34,093 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:04:34,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:04:34,125 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 10:04:34,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:04:34,241 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 10:04:34,766 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-11-18 10:04:34,766 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 9 loop predicates [2018-11-18 10:04:34,766 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 93 states and 115 transitions. cyclomatic complexity: 26 Second operand 11 states. [2018-11-18 10:04:34,982 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 93 states and 115 transitions. cyclomatic complexity: 26. Second operand 11 states. Result 101 states and 123 transitions. Complement of second has 7 states. [2018-11-18 10:04:34,983 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 2 stem states 1 non-accepting loop states 1 accepting loop states [2018-11-18 10:04:34,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-11-18 10:04:34,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 16 transitions. [2018-11-18 10:04:34,984 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 16 transitions. Stem has 30 letters. Loop has 24 letters. [2018-11-18 10:04:34,984 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 10:04:34,984 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-18 10:04:35,029 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:04:35,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:04:35,083 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 10:04:35,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:04:35,153 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 10:04:35,483 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-11-18 10:04:35,484 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 9 loop predicates [2018-11-18 10:04:35,484 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 93 states and 115 transitions. cyclomatic complexity: 26 Second operand 11 states. [2018-11-18 10:04:35,605 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 93 states and 115 transitions. cyclomatic complexity: 26. Second operand 11 states. Result 101 states and 123 transitions. Complement of second has 7 states. [2018-11-18 10:04:35,606 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 2 stem states 1 non-accepting loop states 1 accepting loop states [2018-11-18 10:04:35,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-11-18 10:04:35,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 16 transitions. [2018-11-18 10:04:35,606 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 16 transitions. Stem has 30 letters. Loop has 24 letters. [2018-11-18 10:04:35,606 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 10:04:35,606 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-18 10:04:35,615 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:04:35,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:04:35,637 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 10:04:35,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:04:35,672 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 10:04:35,745 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-11-18 10:04:35,746 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 9 loop predicates [2018-11-18 10:04:35,746 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 93 states and 115 transitions. cyclomatic complexity: 26 Second operand 11 states. [2018-11-18 10:04:35,985 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 93 states and 115 transitions. cyclomatic complexity: 26. Second operand 11 states. Result 258 states and 304 transitions. Complement of second has 31 states. [2018-11-18 10:04:35,993 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 11 states 2 stem states 8 non-accepting loop states 1 accepting loop states [2018-11-18 10:04:35,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-11-18 10:04:35,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 39 transitions. [2018-11-18 10:04:35,994 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 39 transitions. Stem has 30 letters. Loop has 24 letters. [2018-11-18 10:04:35,995 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 10:04:35,995 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-18 10:04:36,018 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-18 10:04:36,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:04:36,039 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 10:04:36,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-18 10:04:36,215 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-18 10:04:36,479 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-11-18 10:04:36,480 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and with honda bouncer for loop.2 stem predicates 9 loop predicates [2018-11-18 10:04:36,480 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 93 states and 115 transitions. cyclomatic complexity: 26 Second operand 11 states. [2018-11-18 10:04:37,213 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 93 states and 115 transitions. cyclomatic complexity: 26. Second operand 11 states. Result 410 states and 516 transitions. Complement of second has 80 states. [2018-11-18 10:04:37,216 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 15 states 2 stem states 12 non-accepting loop states 1 accepting loop states [2018-11-18 10:04:37,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-11-18 10:04:37,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 50 transitions. [2018-11-18 10:04:37,217 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 15 states and 50 transitions. Stem has 30 letters. Loop has 24 letters. [2018-11-18 10:04:37,217 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 10:04:37,217 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 15 states and 50 transitions. Stem has 54 letters. Loop has 24 letters. [2018-11-18 10:04:37,218 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 10:04:37,218 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 15 states and 50 transitions. Stem has 30 letters. Loop has 48 letters. [2018-11-18 10:04:37,219 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-18 10:04:37,219 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 410 states and 516 transitions. [2018-11-18 10:04:37,231 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 62 [2018-11-18 10:04:37,234 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 410 states to 254 states and 346 transitions. [2018-11-18 10:04:37,234 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 155 [2018-11-18 10:04:37,234 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 165 [2018-11-18 10:04:37,234 INFO L73 IsDeterministic]: Start isDeterministic. Operand 254 states and 346 transitions. [2018-11-18 10:04:37,234 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-18 10:04:37,234 INFO L705 BuchiCegarLoop]: Abstraction has 254 states and 346 transitions. [2018-11-18 10:04:37,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states and 346 transitions. [2018-11-18 10:04:37,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 217. [2018-11-18 10:04:37,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2018-11-18 10:04:37,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 271 transitions. [2018-11-18 10:04:37,244 INFO L728 BuchiCegarLoop]: Abstraction has 217 states and 271 transitions. [2018-11-18 10:04:37,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-18 10:04:37,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2018-11-18 10:04:37,244 INFO L87 Difference]: Start difference. First operand 217 states and 271 transitions. Second operand 8 states. [2018-11-18 10:04:37,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-18 10:04:37,340 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2018-11-18 10:04:37,341 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-18 10:04:37,341 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 36 states and 38 transitions. [2018-11-18 10:04:37,342 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2018-11-18 10:04:37,342 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 36 states to 0 states and 0 transitions. [2018-11-18 10:04:37,342 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2018-11-18 10:04:37,342 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2018-11-18 10:04:37,342 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2018-11-18 10:04:37,342 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2018-11-18 10:04:37,342 INFO L705 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-18 10:04:37,342 INFO L728 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-18 10:04:37,343 INFO L608 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-18 10:04:37,343 INFO L442 BuchiCegarLoop]: ======== Iteration 9============ [2018-11-18 10:04:37,343 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2018-11-18 10:04:37,343 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2018-11-18 10:04:37,343 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2018-11-18 10:04:37,349 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 18.11 10:04:37 BoogieIcfgContainer [2018-11-18 10:04:37,349 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2018-11-18 10:04:37,349 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-18 10:04:37,349 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-18 10:04:37,349 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-18 10:04:37,350 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 10:04:10" (3/4) ... [2018-11-18 10:04:37,353 INFO L147 WitnessPrinter]: No result that supports witness generation found [2018-11-18 10:04:37,354 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-18 10:04:37,354 INFO L168 Benchmark]: Toolchain (without parser) took 27444.65 ms. Allocated memory was 1.0 GB in the beginning and 1.4 GB in the end (delta: 320.9 MB). Free memory was 958.5 MB in the beginning and 1.1 GB in the end (delta: -188.2 MB). Peak memory consumption was 132.6 MB. Max. memory is 11.5 GB. [2018-11-18 10:04:37,355 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 985.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 10:04:37,355 INFO L168 Benchmark]: CACSL2BoogieTranslator took 249.75 ms. Allocated memory is still 1.0 GB. Free memory was 958.5 MB in the beginning and 947.7 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-18 10:04:37,356 INFO L168 Benchmark]: Boogie Procedure Inliner took 58.84 ms. Allocated memory is still 1.0 GB. Free memory was 947.7 MB in the beginning and 945.0 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-18 10:04:37,356 INFO L168 Benchmark]: Boogie Preprocessor took 16.73 ms. Allocated memory is still 1.0 GB. Free memory is still 945.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 10:04:37,356 INFO L168 Benchmark]: RCFGBuilder took 363.34 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 165.7 MB). Free memory was 945.0 MB in the beginning and 1.1 GB in the end (delta: -204.7 MB). Peak memory consumption was 23.9 MB. Max. memory is 11.5 GB. [2018-11-18 10:04:37,357 INFO L168 Benchmark]: BuchiAutomizer took 26747.52 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 155.2 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 3.1 MB). Peak memory consumption was 158.3 MB. Max. memory is 11.5 GB. [2018-11-18 10:04:37,357 INFO L168 Benchmark]: Witness Printer took 4.33 ms. Allocated memory is still 1.4 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-18 10:04:37,360 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 1.0 GB. Free memory is still 985.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 249.75 ms. Allocated memory is still 1.0 GB. Free memory was 958.5 MB in the beginning and 947.7 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 58.84 ms. Allocated memory is still 1.0 GB. Free memory was 947.7 MB in the beginning and 945.0 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 16.73 ms. Allocated memory is still 1.0 GB. Free memory is still 945.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 363.34 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 165.7 MB). Free memory was 945.0 MB in the beginning and 1.1 GB in the end (delta: -204.7 MB). Peak memory consumption was 23.9 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 26747.52 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 155.2 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 3.1 MB). Peak memory consumption was 158.3 MB. Max. memory is 11.5 GB. * Witness Printer took 4.33 ms. Allocated memory is still 1.4 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 12 terminating modules (5 trivial, 5 deterministic, 2 nondeterministic). One deterministic module has affine ranking function \old(j) and consists of 11 locations. One deterministic module has affine ranking function \old(i) and consists of 4 locations. One deterministic module has affine ranking function \old(i) and consists of 5 locations. One deterministic module has affine ranking function org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@604802d6 and consists of 11 locations. One deterministic module has affine ranking function i and consists of 5 locations. One nondeterministic module has affine ranking function \old(i) and consists of 5 locations. One nondeterministic module has affine ranking function \old(i) and consists of 15 locations. 5 modules have a trivial ranking function, the largest among these consists of 10 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 26.7s and 9 iterations. TraceHistogramMax:5. Analysis of lassos took 14.1s. Construction of modules took 3.6s. Büchi inclusion checks took 8.5s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 11. Automata minimization 0.1s AutomataMinimizationTime, 11 MinimizatonAttempts, 249 StatesRemovedByMinimization, 11 NontrivialMinimizations. Non-live state removal took 0.1s Buchi closure took 0.0s. Biggest automaton had 315 states and ocurred in iteration 5. Nontrivial modules had stage [5, 0, 1, 1, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 38/58 HoareTripleCheckerStatistics: 305 SDtfs, 344 SDslu, 582 SDs, 0 SdLazy, 963 SolverSat, 316 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.6s Time LassoAnalysisResults: nont0 unkn0 SFLI1 SFLT3 conc0 concLT3 SILN0 SILU0 SILI0 SILT1 lasso0 LassoPreprocessingBenchmarks: Lassos: inital11 mio100 ax100 hnf98 lsp100 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq157 hnf92 smp100 dnf100 smp100 tf112 neg100 sie110 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 8ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 14 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 7 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 8.4s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...