./Ultimate.py --spec ../../sv-benchmarks/c/Termination.prp --file ../../sv-benchmarks/c/termination-crafted/NestedRecursion_1d_true-no-overflow_true-termination_true-valid-memsafety.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 1dbac8bc Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_51f0187a-0fca-45e4-bc69-e97e3bab1b29/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_51f0187a-0fca-45e4-bc69-e97e3bab1b29/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_51f0187a-0fca-45e4-bc69-e97e3bab1b29/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_51f0187a-0fca-45e4-bc69-e97e3bab1b29/bin-2019/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-crafted/NestedRecursion_1d_true-no-overflow_true-termination_true-valid-memsafety.c -s /tmp/vcloud-vcloud-master/worker/working_dir_51f0187a-0fca-45e4-bc69-e97e3bab1b29/bin-2019/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_51f0187a-0fca-45e4-bc69-e97e3bab1b29/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 0837a1e1d82be1b28ccf3514392f1b01c88a9160 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-1dbac8b [2018-11-10 12:09:12,332 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-10 12:09:12,333 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-10 12:09:12,341 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-10 12:09:12,341 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-10 12:09:12,342 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-10 12:09:12,343 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-10 12:09:12,344 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-10 12:09:12,345 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-10 12:09:12,345 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-10 12:09:12,346 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-10 12:09:12,346 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-10 12:09:12,347 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-10 12:09:12,348 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-10 12:09:12,349 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-10 12:09:12,349 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-10 12:09:12,350 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-10 12:09:12,352 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-10 12:09:12,353 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-10 12:09:12,354 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-10 12:09:12,355 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-10 12:09:12,356 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-10 12:09:12,357 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-10 12:09:12,358 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-10 12:09:12,358 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-10 12:09:12,358 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-10 12:09:12,360 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-10 12:09:12,360 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-10 12:09:12,361 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-10 12:09:12,361 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-10 12:09:12,361 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-10 12:09:12,362 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-10 12:09:12,362 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-10 12:09:12,362 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-10 12:09:12,363 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-10 12:09:12,364 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-10 12:09:12,364 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_51f0187a-0fca-45e4-bc69-e97e3bab1b29/bin-2019/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf [2018-11-10 12:09:12,374 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-10 12:09:12,375 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-10 12:09:12,376 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-10 12:09:12,376 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-10 12:09:12,376 INFO L133 SettingsManager]: * Use SBE=true [2018-11-10 12:09:12,376 INFO L131 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2018-11-10 12:09:12,376 INFO L133 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2018-11-10 12:09:12,376 INFO L133 SettingsManager]: * Use old map elimination=false [2018-11-10 12:09:12,376 INFO L133 SettingsManager]: * Use external solver (rank synthesis)=false [2018-11-10 12:09:12,377 INFO L133 SettingsManager]: * Use only trivial implications for array writes=true [2018-11-10 12:09:12,377 INFO L133 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2018-11-10 12:09:12,377 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-10 12:09:12,377 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-11-10 12:09:12,377 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-10 12:09:12,377 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-10 12:09:12,377 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2018-11-10 12:09:12,378 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2018-11-10 12:09:12,378 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2018-11-10 12:09:12,378 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-10 12:09:12,378 INFO L133 SettingsManager]: * Assume nondeterminstic values are in range=false [2018-11-10 12:09:12,379 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2018-11-10 12:09:12,379 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-10 12:09:12,379 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-10 12:09:12,379 INFO L133 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2018-11-10 12:09:12,379 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-10 12:09:12,379 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-10 12:09:12,380 INFO L133 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2018-11-10 12:09:12,380 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-11-10 12:09:12,380 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_51f0187a-0fca-45e4-bc69-e97e3bab1b29/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 -> 0837a1e1d82be1b28ccf3514392f1b01c88a9160 [2018-11-10 12:09:12,406 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-10 12:09:12,414 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-10 12:09:12,417 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-10 12:09:12,418 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-10 12:09:12,418 INFO L276 PluginConnector]: CDTParser initialized [2018-11-10 12:09:12,419 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_51f0187a-0fca-45e4-bc69-e97e3bab1b29/bin-2019/uautomizer/../../sv-benchmarks/c/termination-crafted/NestedRecursion_1d_true-no-overflow_true-termination_true-valid-memsafety.c [2018-11-10 12:09:12,461 INFO L218 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_51f0187a-0fca-45e4-bc69-e97e3bab1b29/bin-2019/uautomizer/data/eb9baae1b/e7e3bc83d64c42b497e72d1b00024498/FLAG219ef8561 [2018-11-10 12:09:12,795 INFO L298 CDTParser]: Found 1 translation units. [2018-11-10 12:09:12,795 INFO L158 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_51f0187a-0fca-45e4-bc69-e97e3bab1b29/sv-benchmarks/c/termination-crafted/NestedRecursion_1d_true-no-overflow_true-termination_true-valid-memsafety.c [2018-11-10 12:09:12,800 INFO L346 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_51f0187a-0fca-45e4-bc69-e97e3bab1b29/bin-2019/uautomizer/data/eb9baae1b/e7e3bc83d64c42b497e72d1b00024498/FLAG219ef8561 [2018-11-10 12:09:12,809 INFO L354 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_51f0187a-0fca-45e4-bc69-e97e3bab1b29/bin-2019/uautomizer/data/eb9baae1b/e7e3bc83d64c42b497e72d1b00024498 [2018-11-10 12:09:12,812 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-10 12:09:12,813 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-10 12:09:12,814 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-10 12:09:12,814 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-10 12:09:12,817 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-10 12:09:12,817 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 12:09:12" (1/1) ... [2018-11-10 12:09:12,819 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e29923f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:09:12, skipping insertion in model container [2018-11-10 12:09:12,819 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 12:09:12" (1/1) ... [2018-11-10 12:09:12,825 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-10 12:09:12,835 INFO L174 MainTranslator]: Built tables and reachable declarations [2018-11-10 12:09:12,929 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-10 12:09:12,931 INFO L189 MainTranslator]: Completed pre-run [2018-11-10 12:09:12,940 INFO L202 PostProcessor]: Analyzing one entry point: main [2018-11-10 12:09:12,948 INFO L193 MainTranslator]: Completed translation [2018-11-10 12:09:12,948 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:09:12 WrapperNode [2018-11-10 12:09:12,948 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-10 12:09:12,949 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-10 12:09:12,949 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-10 12:09:12,949 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-10 12:09:12,956 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:09:12" (1/1) ... [2018-11-10 12:09:12,960 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:09:12" (1/1) ... [2018-11-10 12:09:12,973 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-10 12:09:12,973 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-10 12:09:12,973 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-10 12:09:12,973 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-10 12:09:12,980 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:09:12" (1/1) ... [2018-11-10 12:09:12,981 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:09:12" (1/1) ... [2018-11-10 12:09:12,981 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:09:12" (1/1) ... [2018-11-10 12:09:12,981 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:09:12" (1/1) ... [2018-11-10 12:09:12,982 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:09:12" (1/1) ... [2018-11-10 12:09:12,984 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:09:12" (1/1) ... [2018-11-10 12:09:12,984 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:09:12" (1/1) ... [2018-11-10 12:09:12,985 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-10 12:09:12,986 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-10 12:09:12,986 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-10 12:09:12,986 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-10 12:09:12,986 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:09:12" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_51f0187a-0fca-45e4-bc69-e97e3bab1b29/bin-2019/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-10 12:09:13,074 INFO L130 BoogieDeclarations]: Found specification of procedure rec1 [2018-11-10 12:09:13,074 INFO L138 BoogieDeclarations]: Found implementation of procedure rec1 [2018-11-10 12:09:13,074 INFO L130 BoogieDeclarations]: Found specification of procedure rec2 [2018-11-10 12:09:13,074 INFO L138 BoogieDeclarations]: Found implementation of procedure rec2 [2018-11-10 12:09:13,074 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-10 12:09:13,075 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-10 12:09:13,179 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-10 12:09:13,179 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 12:09:13 BoogieIcfgContainer [2018-11-10 12:09:13,179 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-10 12:09:13,180 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2018-11-10 12:09:13,180 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2018-11-10 12:09:13,183 INFO L276 PluginConnector]: BuchiAutomizer initialized [2018-11-10 12:09:13,184 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-11-10 12:09:13,184 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 10.11 12:09:12" (1/3) ... [2018-11-10 12:09:13,185 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@5f2ecaa1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 10.11 12:09:13, skipping insertion in model container [2018-11-10 12:09:13,185 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-11-10 12:09:13,185 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:09:12" (2/3) ... [2018-11-10 12:09:13,185 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@5f2ecaa1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 10.11 12:09:13, skipping insertion in model container [2018-11-10 12:09:13,185 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-11-10 12:09:13,185 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 12:09:13" (3/3) ... [2018-11-10 12:09:13,187 INFO L375 chiAutomizerObserver]: Analyzing ICFG NestedRecursion_1d_true-no-overflow_true-termination_true-valid-memsafety.c [2018-11-10 12:09:13,234 INFO L135 ementStrategyFactory]: Using default assertion order modulation [2018-11-10 12:09:13,234 INFO L374 BuchiCegarLoop]: Interprodecural is true [2018-11-10 12:09:13,234 INFO L375 BuchiCegarLoop]: Hoare is false [2018-11-10 12:09:13,234 INFO L376 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2018-11-10 12:09:13,235 INFO L377 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-10 12:09:13,235 INFO L378 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-10 12:09:13,235 INFO L379 BuchiCegarLoop]: Difference is false [2018-11-10 12:09:13,235 INFO L380 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-10 12:09:13,235 INFO L383 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2018-11-10 12:09:13,247 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 22 states. [2018-11-10 12:09:13,269 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2018-11-10 12:09:13,269 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-10 12:09:13,269 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-10 12:09:13,277 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2018-11-10 12:09:13,278 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 12:09:13,278 INFO L442 BuchiCegarLoop]: ======== Iteration 1============ [2018-11-10 12:09:13,278 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 22 states. [2018-11-10 12:09:13,280 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2018-11-10 12:09:13,280 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-10 12:09:13,280 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-10 12:09:13,280 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2018-11-10 12:09:13,281 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 12:09:13,285 INFO L793 eck$LassoCheckResult]: Stem: 14#ULTIMATE.startENTRYtrue assume { :begin_inline_ULTIMATE.init } true; 12#L-1true assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 23#L25true call main_#t~ret6 := rec2(main_~x~0);< 3#rec2ENTRYtrue [2018-11-10 12:09:13,286 INFO L795 eck$LassoCheckResult]: Loop: 3#rec2ENTRYtrue ~j := #in~j; 21#L18true assume !(~j <= 0); 19#L20true call #t~ret3 := rec1(~j);< 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 - 1);< 3#rec2ENTRYtrue [2018-11-10 12:09:13,290 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 12:09:13,290 INFO L82 PathProgramCache]: Analyzing trace with hash 48738, now seen corresponding path program 1 times [2018-11-10 12:09:13,291 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 12:09:13,291 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 12:09:13,321 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:09:13,321 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 12:09:13,321 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:09:13,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-10 12:09:13,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-10 12:09:13,346 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 12:09:13,346 INFO L82 PathProgramCache]: Analyzing trace with hash -1074209557, now seen corresponding path program 1 times [2018-11-10 12:09:13,346 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 12:09:13,346 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 12:09:13,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:09:13,347 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 12:09:13,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:09:13,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 12:09:13,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 12:09:13,410 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 12:09:13,410 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-10 12:09:13,413 INFO L810 eck$LassoCheckResult]: loop already infeasible [2018-11-10 12:09:13,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-10 12:09:13,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-11-10 12:09:13,424 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 5 states. [2018-11-10 12:09:13,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 12:09:13,490 INFO L93 Difference]: Finished difference Result 26 states and 34 transitions. [2018-11-10 12:09:13,491 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-11-10 12:09:13,492 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 26 states and 34 transitions. [2018-11-10 12:09:13,494 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2018-11-10 12:09:13,499 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 26 states to 17 states and 23 transitions. [2018-11-10 12:09:13,500 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 17 [2018-11-10 12:09:13,500 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 17 [2018-11-10 12:09:13,500 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 23 transitions. [2018-11-10 12:09:13,501 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2018-11-10 12:09:13,501 INFO L705 BuchiCegarLoop]: Abstraction has 17 states and 23 transitions. [2018-11-10 12:09:13,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states and 23 transitions. [2018-11-10 12:09:13,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-11-10 12:09:13,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-11-10 12:09:13,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 23 transitions. [2018-11-10 12:09:13,522 INFO L728 BuchiCegarLoop]: Abstraction has 17 states and 23 transitions. [2018-11-10 12:09:13,522 INFO L608 BuchiCegarLoop]: Abstraction has 17 states and 23 transitions. [2018-11-10 12:09:13,522 INFO L442 BuchiCegarLoop]: ======== Iteration 2============ [2018-11-10 12:09:13,522 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 17 states and 23 transitions. [2018-11-10 12:09:13,523 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2018-11-10 12:09:13,523 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-10 12:09:13,523 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-10 12:09:13,524 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2018-11-10 12:09:13,524 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 12:09:13,524 INFO L793 eck$LassoCheckResult]: Stem: 76#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 75#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; 62#L25 call main_#t~ret6 := rec2(main_~x~0);< 61#rec2ENTRY [2018-11-10 12:09:13,524 INFO L795 eck$LassoCheckResult]: Loop: 61#rec2ENTRY ~j := #in~j; 64#L18 assume !(~j <= 0); 69#L20 call #t~ret3 := rec1(~j);< 65#rec1ENTRY ~i := #in~i; 70#L12 assume !(~i <= 0); 66#L14 call #t~ret0 := rec1(~i - 2);< 65#rec1ENTRY ~i := #in~i; 70#L12 assume ~i <= 0;#res := 0; 71#rec1FINAL assume true; 72#rec1EXIT >#28#return; 67#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 65#rec1ENTRY ~i := #in~i; 70#L12 assume ~i <= 0;#res := 0; 71#rec1FINAL assume true; 72#rec1EXIT >#30#return; 68#L14-2 call #t~ret2 := rec1(#t~ret1);< 65#rec1ENTRY ~i := #in~i; 70#L12 assume ~i <= 0;#res := 0; 71#rec1FINAL assume true; 72#rec1EXIT >#32#return; 73#L14-3 #res := #t~ret2 + 1;havoc #t~ret1;havoc #t~ret2;havoc #t~ret0; 74#rec1FINAL assume true; 77#rec1EXIT >#34#return; 63#L20-1 call #t~ret4 := rec2(#t~ret3 - 1);< 61#rec2ENTRY [2018-11-10 12:09:13,524 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 12:09:13,525 INFO L82 PathProgramCache]: Analyzing trace with hash 48738, now seen corresponding path program 2 times [2018-11-10 12:09:13,525 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 12:09:13,525 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 12:09:13,525 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:09:13,526 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 12:09:13,526 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:09:13,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-10 12:09:13,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-10 12:09:13,528 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 12:09:13,528 INFO L82 PathProgramCache]: Analyzing trace with hash -204878921, now seen corresponding path program 1 times [2018-11-10 12:09:13,528 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 12:09:13,528 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 12:09:13,529 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:09:13,529 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 12:09:13,529 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:09:13,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-10 12:09:13,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-10 12:09:13,550 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 12:09:13,550 INFO L82 PathProgramCache]: Analyzing trace with hash -482494696, now seen corresponding path program 1 times [2018-11-10 12:09:13,550 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 12:09:13,550 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 12:09:13,551 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:09:13,551 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 12:09:13,551 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:09:13,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-10 12:09:13,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-10 12:09:13,830 INFO L214 LassoAnalysis]: Preferences: [2018-11-10 12:09:13,831 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-10 12:09:13,832 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-10 12:09:13,832 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-10 12:09:13,832 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-10 12:09:13,832 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-10 12:09:13,832 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-10 12:09:13,832 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-10 12:09:13,832 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1d_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration2_Loop [2018-11-10 12:09:13,832 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-10 12:09:13,833 INFO L280 LassoAnalysis]: Starting lasso preprocessing... [2018-11-10 12:09:13,846 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-10 12:09:13,850 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-10 12:09:13,852 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-10 12:09:13,854 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-10 12:09:13,856 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-10 12:09:13,886 INFO L298 LassoAnalysis]: Preprocessing complete. [2018-11-10 12:09:13,887 INFO L410 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_51f0187a-0fca-45e4-bc69-e97e3bab1b29/bin-2019/uautomizer/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-10 12:09:13,890 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-10 12:09:13,890 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-10 12:09:13,895 INFO L443 LassoAnalysis]: Proved nontermination for one component. [2018-11-10 12:09:13,896 INFO L446 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_51f0187a-0fca-45e4-bc69-e97e3bab1b29/bin-2019/uautomizer/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-10 12:09:13,912 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-10 12:09:13,912 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-10 12:09:13,914 INFO L443 LassoAnalysis]: Proved nontermination for one component. [2018-11-10 12:09:13,914 INFO L446 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_51f0187a-0fca-45e4-bc69-e97e3bab1b29/bin-2019/uautomizer/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-10 12:09:13,930 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-10 12:09:13,930 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-10 12:09:13,934 INFO L443 LassoAnalysis]: Proved nontermination for one component. [2018-11-10 12:09:13,934 INFO L446 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_51f0187a-0fca-45e4-bc69-e97e3bab1b29/bin-2019/uautomizer/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-10 12:09:13,950 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-10 12:09:13,950 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-10 12:09:13,952 INFO L443 LassoAnalysis]: Proved nontermination for one component. [2018-11-10 12:09:13,952 INFO L446 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_51f0187a-0fca-45e4-bc69-e97e3bab1b29/bin-2019/uautomizer/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-10 12:09:13,971 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-10 12:09:13,971 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_51f0187a-0fca-45e4-bc69-e97e3bab1b29/bin-2019/uautomizer/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-10 12:09:13,989 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-10 12:09:13,990 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-10 12:09:14,009 INFO L450 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-10 12:09:14,010 INFO L214 LassoAnalysis]: Preferences: [2018-11-10 12:09:14,010 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-10 12:09:14,010 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-10 12:09:14,010 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-10 12:09:14,011 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-10 12:09:14,011 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-10 12:09:14,011 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-10 12:09:14,011 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-10 12:09:14,011 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1d_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration2_Loop [2018-11-10 12:09:14,011 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-10 12:09:14,011 INFO L280 LassoAnalysis]: Starting lasso preprocessing... [2018-11-10 12:09:14,012 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-10 12:09:14,019 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-10 12:09:14,021 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-10 12:09:14,022 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-10 12:09:14,032 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-10 12:09:14,063 INFO L298 LassoAnalysis]: Preprocessing complete. [2018-11-10 12:09:14,066 INFO L496 LassoAnalysis]: Using template 'affine'. [2018-11-10 12:09:14,067 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-10 12:09:14,068 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-10 12:09:14,068 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-10 12:09:14,069 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-10 12:09:14,069 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-10 12:09:14,069 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-10 12:09:14,071 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-10 12:09:14,071 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-10 12:09:14,073 INFO L529 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-10 12:09:14,073 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-10 12:09:14,074 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-10 12:09:14,074 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-10 12:09:14,074 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-10 12:09:14,074 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-10 12:09:14,074 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-10 12:09:14,075 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-10 12:09:14,075 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-10 12:09:14,076 INFO L529 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-10 12:09:14,076 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-10 12:09:14,077 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-10 12:09:14,077 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-10 12:09:14,077 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-10 12:09:14,077 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-10 12:09:14,077 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-10 12:09:14,077 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-10 12:09:14,078 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-10 12:09:14,079 INFO L529 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-10 12:09:14,079 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-10 12:09:14,079 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-10 12:09:14,080 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-10 12:09:14,080 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-10 12:09:14,080 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-10 12:09:14,080 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-10 12:09:14,080 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-10 12:09:14,081 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-10 12:09:14,085 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-10 12:09:14,088 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-11-10 12:09:14,088 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-11-10 12:09:14,090 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-10 12:09:14,090 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-10 12:09:14,091 INFO L517 LassoAnalysis]: Proved termination. [2018-11-10 12:09:14,091 INFO L519 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec2_#in~j) = 1*rec2_#in~j Supporting invariants [] [2018-11-10 12:09:14,092 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-10 12:09:14,119 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 12:09:14,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 12:09:14,131 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 12:09:14,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 12:09:14,171 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 12:09:14,338 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-11-10 12:09:14,340 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 8 loop predicates [2018-11-10 12:09:14,341 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 17 states and 23 transitions. cyclomatic complexity: 8 Second operand 9 states. [2018-11-10 12:09:14,656 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 17 states and 23 transitions. cyclomatic complexity: 8. Second operand 9 states. Result 102 states and 148 transitions. Complement of second has 42 states. [2018-11-10 12:09:14,657 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 10 states 1 stem states 8 non-accepting loop states 1 accepting loop states [2018-11-10 12:09:14,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-11-10 12:09:14,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 37 transitions. [2018-11-10 12:09:14,660 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 37 transitions. Stem has 3 letters. Loop has 24 letters. [2018-11-10 12:09:14,661 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-10 12:09:14,661 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 37 transitions. Stem has 27 letters. Loop has 24 letters. [2018-11-10 12:09:14,662 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-10 12:09:14,662 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 37 transitions. Stem has 3 letters. Loop has 48 letters. [2018-11-10 12:09:14,662 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-10 12:09:14,663 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 102 states and 148 transitions. [2018-11-10 12:09:14,669 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2018-11-10 12:09:14,673 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 102 states to 90 states and 136 transitions. [2018-11-10 12:09:14,674 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 39 [2018-11-10 12:09:14,674 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 42 [2018-11-10 12:09:14,674 INFO L73 IsDeterministic]: Start isDeterministic. Operand 90 states and 136 transitions. [2018-11-10 12:09:14,675 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-10 12:09:14,675 INFO L705 BuchiCegarLoop]: Abstraction has 90 states and 136 transitions. [2018-11-10 12:09:14,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states and 136 transitions. [2018-11-10 12:09:14,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 63. [2018-11-10 12:09:14,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-11-10 12:09:14,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 99 transitions. [2018-11-10 12:09:14,687 INFO L728 BuchiCegarLoop]: Abstraction has 63 states and 99 transitions. [2018-11-10 12:09:14,687 INFO L608 BuchiCegarLoop]: Abstraction has 63 states and 99 transitions. [2018-11-10 12:09:14,687 INFO L442 BuchiCegarLoop]: ======== Iteration 3============ [2018-11-10 12:09:14,687 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 63 states and 99 transitions. [2018-11-10 12:09:14,688 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2018-11-10 12:09:14,688 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-10 12:09:14,688 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-10 12:09:14,688 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 12:09:14,688 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2018-11-10 12:09:14,689 INFO L793 eck$LassoCheckResult]: Stem: 381#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 377#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; 341#L25 call main_#t~ret6 := rec2(main_~x~0);< 340#rec2ENTRY ~j := #in~j; 343#L18 assume !(~j <= 0); 369#L20 call #t~ret3 := rec1(~j);< 390#rec1ENTRY ~i := #in~i; 374#L12 assume !(~i <= 0); 350#L14 call #t~ret0 := rec1(~i - 2);< 346#rec1ENTRY [2018-11-10 12:09:14,689 INFO L795 eck$LassoCheckResult]: Loop: 346#rec1ENTRY ~i := #in~i; 354#L12 assume !(~i <= 0); 347#L14 call #t~ret0 := rec1(~i - 2);< 346#rec1ENTRY [2018-11-10 12:09:14,689 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 12:09:14,689 INFO L82 PathProgramCache]: Analyzing trace with hash 838970620, now seen corresponding path program 1 times [2018-11-10 12:09:14,689 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 12:09:14,689 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 12:09:14,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:09:14,690 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 12:09:14,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:09:14,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-10 12:09:14,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-10 12:09:14,695 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 12:09:14,695 INFO L82 PathProgramCache]: Analyzing trace with hash 29942, now seen corresponding path program 1 times [2018-11-10 12:09:14,695 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 12:09:14,696 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 12:09:14,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:09:14,696 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 12:09:14,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:09:14,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-10 12:09:14,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-10 12:09:14,699 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 12:09:14,700 INFO L82 PathProgramCache]: Analyzing trace with hash 1359045147, now seen corresponding path program 2 times [2018-11-10 12:09:14,700 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 12:09:14,700 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 12:09:14,700 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:09:14,701 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 12:09:14,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:09:14,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-10 12:09:14,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-10 12:09:14,724 INFO L214 LassoAnalysis]: Preferences: [2018-11-10 12:09:14,725 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-10 12:09:14,725 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-10 12:09:14,725 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-10 12:09:14,725 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-10 12:09:14,725 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-10 12:09:14,725 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-10 12:09:14,725 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-10 12:09:14,725 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1d_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration3_Loop [2018-11-10 12:09:14,725 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-10 12:09:14,725 INFO L280 LassoAnalysis]: Starting lasso preprocessing... [2018-11-10 12:09:14,726 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-10 12:09:14,727 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-10 12:09:14,729 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-10 12:09:14,735 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-10 12:09:14,736 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-10 12:09:14,739 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-10 12:09:14,753 INFO L298 LassoAnalysis]: Preprocessing complete. [2018-11-10 12:09:14,753 INFO L410 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_51f0187a-0fca-45e4-bc69-e97e3bab1b29/bin-2019/uautomizer/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-10 12:09:14,755 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-10 12:09:14,755 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-10 12:09:14,757 INFO L443 LassoAnalysis]: Proved nontermination for one component. [2018-11-10 12:09:14,757 INFO L446 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_51f0187a-0fca-45e4-bc69-e97e3bab1b29/bin-2019/uautomizer/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-10 12:09:14,773 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-10 12:09:14,773 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-10 12:09:14,774 INFO L443 LassoAnalysis]: Proved nontermination for one component. [2018-11-10 12:09:14,775 INFO L446 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_51f0187a-0fca-45e4-bc69-e97e3bab1b29/bin-2019/uautomizer/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-10 12:09:14,790 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-10 12:09:14,790 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-10 12:09:14,792 INFO L443 LassoAnalysis]: Proved nontermination for one component. [2018-11-10 12:09:14,792 INFO L446 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_51f0187a-0fca-45e4-bc69-e97e3bab1b29/bin-2019/uautomizer/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-10 12:09:14,808 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-10 12:09:14,808 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-10 12:09:14,811 INFO L443 LassoAnalysis]: Proved nontermination for one component. [2018-11-10 12:09:14,811 INFO L446 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_51f0187a-0fca-45e4-bc69-e97e3bab1b29/bin-2019/uautomizer/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-10 12:09:14,828 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-10 12:09:14,828 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_51f0187a-0fca-45e4-bc69-e97e3bab1b29/bin-2019/uautomizer/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-10 12:09:14,845 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-10 12:09:14,845 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-10 12:09:14,862 INFO L450 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-10 12:09:14,863 INFO L214 LassoAnalysis]: Preferences: [2018-11-10 12:09:14,863 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-10 12:09:14,863 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-10 12:09:14,863 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-10 12:09:14,863 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-10 12:09:14,863 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-10 12:09:14,863 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-10 12:09:14,864 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-10 12:09:14,864 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1d_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration3_Loop [2018-11-10 12:09:14,864 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-10 12:09:14,864 INFO L280 LassoAnalysis]: Starting lasso preprocessing... [2018-11-10 12:09:14,865 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-10 12:09:14,866 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-10 12:09:14,867 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-10 12:09:14,868 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-10 12:09:14,872 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-10 12:09:14,873 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-10 12:09:14,891 INFO L298 LassoAnalysis]: Preprocessing complete. [2018-11-10 12:09:14,891 INFO L496 LassoAnalysis]: Using template 'affine'. [2018-11-10 12:09:14,892 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-10 12:09:14,892 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-10 12:09:14,893 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-10 12:09:14,893 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-10 12:09:14,893 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-10 12:09:14,893 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-10 12:09:14,893 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-10 12:09:14,894 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-10 12:09:14,895 INFO L529 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-10 12:09:14,896 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-10 12:09:14,896 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-10 12:09:14,896 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-10 12:09:14,896 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-10 12:09:14,897 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-10 12:09:14,897 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-10 12:09:14,897 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-10 12:09:14,897 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-10 12:09:14,898 INFO L529 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-10 12:09:14,898 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-10 12:09:14,899 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-10 12:09:14,899 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-10 12:09:14,899 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-10 12:09:14,899 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-10 12:09:14,899 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-10 12:09:14,900 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-10 12:09:14,900 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-10 12:09:14,901 INFO L529 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-10 12:09:14,901 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-10 12:09:14,901 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-10 12:09:14,902 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-10 12:09:14,902 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-10 12:09:14,902 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-10 12:09:14,902 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-10 12:09:14,903 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-10 12:09:14,903 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-10 12:09:14,906 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-10 12:09:14,908 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2018-11-10 12:09:14,908 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2018-11-10 12:09:14,909 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-10 12:09:14,909 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-10 12:09:14,909 INFO L517 LassoAnalysis]: Proved termination. [2018-11-10 12:09:14,909 INFO L519 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] [2018-11-10 12:09:14,909 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-10 12:09:14,930 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 12:09:14,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 12:09:14,958 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 12:09:14,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 12:09:14,964 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 12:09:14,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 12:09:14,974 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 [2018-11-10 12:09:14,974 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 63 states and 99 transitions. cyclomatic complexity: 40 Second operand 4 states. [2018-11-10 12:09:15,001 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 63 states and 99 transitions. cyclomatic complexity: 40. Second operand 4 states. Result 109 states and 166 transitions. Complement of second has 13 states. [2018-11-10 12:09:15,002 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 [2018-11-10 12:09:15,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2018-11-10 12:09:15,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 14 transitions. [2018-11-10 12:09:15,002 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 14 transitions. Stem has 9 letters. Loop has 3 letters. [2018-11-10 12:09:15,003 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-10 12:09:15,003 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 14 transitions. Stem has 12 letters. Loop has 3 letters. [2018-11-10 12:09:15,003 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-10 12:09:15,003 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 14 transitions. Stem has 9 letters. Loop has 6 letters. [2018-11-10 12:09:15,003 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-10 12:09:15,003 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 109 states and 166 transitions. [2018-11-10 12:09:15,006 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2018-11-10 12:09:15,009 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 109 states to 97 states and 154 transitions. [2018-11-10 12:09:15,009 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 41 [2018-11-10 12:09:15,010 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 43 [2018-11-10 12:09:15,010 INFO L73 IsDeterministic]: Start isDeterministic. Operand 97 states and 154 transitions. [2018-11-10 12:09:15,010 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-10 12:09:15,010 INFO L705 BuchiCegarLoop]: Abstraction has 97 states and 154 transitions. [2018-11-10 12:09:15,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states and 154 transitions. [2018-11-10 12:09:15,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 93. [2018-11-10 12:09:15,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-11-10 12:09:15,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 144 transitions. [2018-11-10 12:09:15,016 INFO L728 BuchiCegarLoop]: Abstraction has 93 states and 144 transitions. [2018-11-10 12:09:15,017 INFO L608 BuchiCegarLoop]: Abstraction has 93 states and 144 transitions. [2018-11-10 12:09:15,017 INFO L442 BuchiCegarLoop]: ======== Iteration 4============ [2018-11-10 12:09:15,017 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 93 states and 144 transitions. [2018-11-10 12:09:15,018 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2018-11-10 12:09:15,018 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-10 12:09:15,018 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-10 12:09:15,018 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 12:09:15,018 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2018-11-10 12:09:15,019 INFO L793 eck$LassoCheckResult]: Stem: 625#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 622#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; 623#L25 call main_#t~ret6 := rec2(main_~x~0);< 629#rec2ENTRY ~j := #in~j; 655#L18 assume !(~j <= 0); 588#L20 call #t~ret3 := rec1(~j);< 587#rec1ENTRY ~i := #in~i; 589#L12 assume !(~i <= 0); 608#L14 call #t~ret0 := rec1(~i - 2);< 626#rec1ENTRY ~i := #in~i; 647#L12 assume ~i <= 0;#res := 0; 646#rec1FINAL assume true; 643#rec1EXIT >#28#return; 613#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 615#rec1ENTRY [2018-11-10 12:09:15,019 INFO L795 eck$LassoCheckResult]: Loop: 615#rec1ENTRY ~i := #in~i; 642#L12 assume !(~i <= 0); 609#L14 call #t~ret0 := rec1(~i - 2);< 615#rec1ENTRY [2018-11-10 12:09:15,019 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 12:09:15,020 INFO L82 PathProgramCache]: Analyzing trace with hash 372282091, now seen corresponding path program 1 times [2018-11-10 12:09:15,020 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 12:09:15,020 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 12:09:15,020 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:09:15,021 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 12:09:15,021 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:09:15,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-10 12:09:15,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-10 12:09:15,029 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 12:09:15,029 INFO L82 PathProgramCache]: Analyzing trace with hash 29942, now seen corresponding path program 2 times [2018-11-10 12:09:15,029 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 12:09:15,029 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 12:09:15,030 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:09:15,030 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 12:09:15,030 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:09:15,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-10 12:09:15,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-10 12:09:15,033 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 12:09:15,033 INFO L82 PathProgramCache]: Analyzing trace with hash 1050214860, now seen corresponding path program 2 times [2018-11-10 12:09:15,033 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 12:09:15,033 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 12:09:15,034 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:09:15,034 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 12:09:15,034 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:09:15,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 12:09:15,058 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-10 12:09:15,058 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-10 12:09:15,058 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-10 12:09:15,070 INFO L214 LassoAnalysis]: Preferences: [2018-11-10 12:09:15,070 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-10 12:09:15,070 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-10 12:09:15,070 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-10 12:09:15,070 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-10 12:09:15,070 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-10 12:09:15,071 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-10 12:09:15,071 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-10 12:09:15,071 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1d_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration4_Loop [2018-11-10 12:09:15,071 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-10 12:09:15,071 INFO L280 LassoAnalysis]: Starting lasso preprocessing... [2018-11-10 12:09:15,072 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-10 12:09:15,080 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-10 12:09:15,081 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-10 12:09:15,082 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-10 12:09:15,085 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-10 12:09:15,085 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-10 12:09:15,099 INFO L298 LassoAnalysis]: Preprocessing complete. [2018-11-10 12:09:15,099 INFO L410 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_51f0187a-0fca-45e4-bc69-e97e3bab1b29/bin-2019/uautomizer/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-10 12:09:15,101 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-10 12:09:15,101 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-10 12:09:15,103 INFO L443 LassoAnalysis]: Proved nontermination for one component. [2018-11-10 12:09:15,103 INFO L446 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_51f0187a-0fca-45e4-bc69-e97e3bab1b29/bin-2019/uautomizer/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-10 12:09:15,119 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-10 12:09:15,119 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-10 12:09:15,120 INFO L443 LassoAnalysis]: Proved nontermination for one component. [2018-11-10 12:09:15,121 INFO L446 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_51f0187a-0fca-45e4-bc69-e97e3bab1b29/bin-2019/uautomizer/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-10 12:09:15,137 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-10 12:09:15,137 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-10 12:09:15,138 INFO L443 LassoAnalysis]: Proved nontermination for one component. [2018-11-10 12:09:15,139 INFO L446 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_51f0187a-0fca-45e4-bc69-e97e3bab1b29/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 [2018-11-10 12:09:15,154 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-10 12:09:15,155 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_51f0187a-0fca-45e4-bc69-e97e3bab1b29/bin-2019/uautomizer/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-10 12:09:15,172 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-10 12:09:15,173 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-10 12:09:15,189 INFO L450 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-10 12:09:15,191 INFO L214 LassoAnalysis]: Preferences: [2018-11-10 12:09:15,191 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-10 12:09:15,191 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-10 12:09:15,191 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-10 12:09:15,191 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-10 12:09:15,191 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-10 12:09:15,191 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-10 12:09:15,191 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-10 12:09:15,191 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1d_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration4_Loop [2018-11-10 12:09:15,191 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-10 12:09:15,192 INFO L280 LassoAnalysis]: Starting lasso preprocessing... [2018-11-10 12:09:15,192 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-10 12:09:15,193 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-10 12:09:15,195 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-10 12:09:15,198 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-10 12:09:15,199 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-10 12:09:15,200 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-10 12:09:15,213 INFO L298 LassoAnalysis]: Preprocessing complete. [2018-11-10 12:09:15,213 INFO L496 LassoAnalysis]: Using template 'affine'. [2018-11-10 12:09:15,213 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-10 12:09:15,214 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-10 12:09:15,214 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-10 12:09:15,214 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-10 12:09:15,214 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-10 12:09:15,214 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-10 12:09:15,215 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-10 12:09:15,215 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-10 12:09:15,216 INFO L529 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-10 12:09:15,216 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-10 12:09:15,216 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-10 12:09:15,216 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-10 12:09:15,217 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-10 12:09:15,217 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-10 12:09:15,217 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-10 12:09:15,217 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-10 12:09:15,217 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-10 12:09:15,218 INFO L529 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-10 12:09:15,218 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-10 12:09:15,218 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-10 12:09:15,218 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-10 12:09:15,219 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-10 12:09:15,219 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-10 12:09:15,219 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-10 12:09:15,219 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-10 12:09:15,219 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-10 12:09:15,222 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-10 12:09:15,223 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2018-11-10 12:09:15,223 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2018-11-10 12:09:15,223 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-10 12:09:15,223 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-10 12:09:15,223 INFO L517 LassoAnalysis]: Proved termination. [2018-11-10 12:09:15,223 INFO L519 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] [2018-11-10 12:09:15,224 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-10 12:09:15,232 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 12:09:15,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 12:09:15,244 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 12:09:15,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 12:09:15,258 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 12:09:15,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 12:09:15,267 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2018-11-10 12:09:15,267 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 93 states and 144 transitions. cyclomatic complexity: 57 Second operand 5 states. [2018-11-10 12:09:15,317 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 93 states and 144 transitions. cyclomatic complexity: 57. Second operand 5 states. Result 133 states and 208 transitions. Complement of second has 14 states. [2018-11-10 12:09:15,319 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2018-11-10 12:09:15,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-11-10 12:09:15,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 18 transitions. [2018-11-10 12:09:15,320 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 18 transitions. Stem has 14 letters. Loop has 3 letters. [2018-11-10 12:09:15,320 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-10 12:09:15,320 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 18 transitions. Stem has 17 letters. Loop has 3 letters. [2018-11-10 12:09:15,320 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-10 12:09:15,320 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 18 transitions. Stem has 14 letters. Loop has 6 letters. [2018-11-10 12:09:15,320 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-10 12:09:15,321 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 133 states and 208 transitions. [2018-11-10 12:09:15,323 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2018-11-10 12:09:15,326 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 133 states to 121 states and 196 transitions. [2018-11-10 12:09:15,326 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 50 [2018-11-10 12:09:15,327 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 52 [2018-11-10 12:09:15,327 INFO L73 IsDeterministic]: Start isDeterministic. Operand 121 states and 196 transitions. [2018-11-10 12:09:15,327 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-10 12:09:15,327 INFO L705 BuchiCegarLoop]: Abstraction has 121 states and 196 transitions. [2018-11-10 12:09:15,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states and 196 transitions. [2018-11-10 12:09:15,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 117. [2018-11-10 12:09:15,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-11-10 12:09:15,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 186 transitions. [2018-11-10 12:09:15,337 INFO L728 BuchiCegarLoop]: Abstraction has 117 states and 186 transitions. [2018-11-10 12:09:15,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-10 12:09:15,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-11-10 12:09:15,337 INFO L87 Difference]: Start difference. First operand 117 states and 186 transitions. Second operand 6 states. [2018-11-10 12:09:15,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 12:09:15,364 INFO L93 Difference]: Finished difference Result 130 states and 196 transitions. [2018-11-10 12:09:15,366 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-10 12:09:15,366 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 130 states and 196 transitions. [2018-11-10 12:09:15,368 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 11 [2018-11-10 12:09:15,371 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 130 states to 128 states and 194 transitions. [2018-11-10 12:09:15,371 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 60 [2018-11-10 12:09:15,371 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 60 [2018-11-10 12:09:15,371 INFO L73 IsDeterministic]: Start isDeterministic. Operand 128 states and 194 transitions. [2018-11-10 12:09:15,371 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-10 12:09:15,371 INFO L705 BuchiCegarLoop]: Abstraction has 128 states and 194 transitions. [2018-11-10 12:09:15,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states and 194 transitions. [2018-11-10 12:09:15,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 105. [2018-11-10 12:09:15,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-11-10 12:09:15,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 158 transitions. [2018-11-10 12:09:15,377 INFO L728 BuchiCegarLoop]: Abstraction has 105 states and 158 transitions. [2018-11-10 12:09:15,378 INFO L608 BuchiCegarLoop]: Abstraction has 105 states and 158 transitions. [2018-11-10 12:09:15,378 INFO L442 BuchiCegarLoop]: ======== Iteration 5============ [2018-11-10 12:09:15,378 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 105 states and 158 transitions. [2018-11-10 12:09:15,379 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2018-11-10 12:09:15,379 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-10 12:09:15,379 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-10 12:09:15,380 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 12:09:15,380 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2018-11-10 12:09:15,380 INFO L793 eck$LassoCheckResult]: Stem: 1201#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 1197#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; 1198#L25 call main_#t~ret6 := rec2(main_~x~0);< 1205#rec2ENTRY ~j := #in~j; 1218#L18 assume !(~j <= 0); 1194#L20 call #t~ret3 := rec1(~j);< 1217#rec1ENTRY ~i := #in~i; 1216#L12 assume !(~i <= 0); 1165#L14 call #t~ret0 := rec1(~i - 2);< 1215#rec1ENTRY ~i := #in~i; 1213#L12 assume !(~i <= 0); 1169#L14 call #t~ret0 := rec1(~i - 2);< 1212#rec1ENTRY ~i := #in~i; 1214#L12 assume ~i <= 0;#res := 0; 1254#rec1FINAL assume true; 1199#rec1EXIT >#28#return; 1158#L14-1 [2018-11-10 12:09:15,380 INFO L795 eck$LassoCheckResult]: Loop: 1158#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 1156#rec1ENTRY ~i := #in~i; 1159#L12 assume ~i <= 0;#res := 0; 1253#rec1FINAL assume true; 1251#rec1EXIT >#30#return; 1171#L14-2 call #t~ret2 := rec1(#t~ret1);< 1195#rec1ENTRY ~i := #in~i; 1250#L12 assume !(~i <= 0); 1173#L14 call #t~ret0 := rec1(~i - 2);< 1195#rec1ENTRY ~i := #in~i; 1250#L12 assume ~i <= 0;#res := 0; 1249#rec1FINAL assume true; 1248#rec1EXIT >#28#return; 1158#L14-1 [2018-11-10 12:09:15,380 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 12:09:15,380 INFO L82 PathProgramCache]: Analyzing trace with hash 1325197585, now seen corresponding path program 1 times [2018-11-10 12:09:15,380 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 12:09:15,380 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 12:09:15,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:09:15,381 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 12:09:15,381 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:09:15,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-10 12:09:15,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-10 12:09:15,389 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 12:09:15,389 INFO L82 PathProgramCache]: Analyzing trace with hash 949089090, now seen corresponding path program 1 times [2018-11-10 12:09:15,389 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 12:09:15,389 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 12:09:15,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:09:15,390 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 12:09:15,390 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:09:15,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 12:09:15,424 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-10 12:09:15,424 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 12:09:15,424 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_51f0187a-0fca-45e4-bc69-e97e3bab1b29/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 [2018-11-10 12:09:15,433 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 12:09:15,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 12:09:15,452 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 12:09:15,453 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 12:09:15,470 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-10 12:09:15,470 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 6 [2018-11-10 12:09:15,470 INFO L810 eck$LassoCheckResult]: loop already infeasible [2018-11-10 12:09:15,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-10 12:09:15,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-11-10 12:09:15,471 INFO L87 Difference]: Start difference. First operand 105 states and 158 transitions. cyclomatic complexity: 59 Second operand 6 states. [2018-11-10 12:09:15,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 12:09:15,499 INFO L93 Difference]: Finished difference Result 120 states and 174 transitions. [2018-11-10 12:09:15,503 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-10 12:09:15,503 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 120 states and 174 transitions. [2018-11-10 12:09:15,505 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2018-11-10 12:09:15,507 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 120 states to 115 states and 165 transitions. [2018-11-10 12:09:15,507 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 51 [2018-11-10 12:09:15,507 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 51 [2018-11-10 12:09:15,507 INFO L73 IsDeterministic]: Start isDeterministic. Operand 115 states and 165 transitions. [2018-11-10 12:09:15,508 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-10 12:09:15,508 INFO L705 BuchiCegarLoop]: Abstraction has 115 states and 165 transitions. [2018-11-10 12:09:15,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states and 165 transitions. [2018-11-10 12:09:15,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 112. [2018-11-10 12:09:15,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-11-10 12:09:15,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 162 transitions. [2018-11-10 12:09:15,515 INFO L728 BuchiCegarLoop]: Abstraction has 112 states and 162 transitions. [2018-11-10 12:09:15,515 INFO L608 BuchiCegarLoop]: Abstraction has 112 states and 162 transitions. [2018-11-10 12:09:15,515 INFO L442 BuchiCegarLoop]: ======== Iteration 6============ [2018-11-10 12:09:15,515 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 112 states and 162 transitions. [2018-11-10 12:09:15,516 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2018-11-10 12:09:15,516 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-10 12:09:15,516 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-10 12:09:15,517 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [5, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 12:09:15,517 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2018-11-10 12:09:15,517 INFO L793 eck$LassoCheckResult]: Stem: 1477#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 1475#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 1427#L25 call main_#t~ret6 := rec2(main_~x~0);< 1426#rec2ENTRY ~j := #in~j; 1428#L18 assume !(~j <= 0); 1478#L20 call #t~ret3 := rec1(~j);< 1480#rec1ENTRY ~i := #in~i; 1509#L12 assume !(~i <= 0); 1434#L14 call #t~ret0 := rec1(~i - 2);< 1433#rec1ENTRY ~i := #in~i; 1435#L12 assume !(~i <= 0); 1447#L14 call #t~ret0 := rec1(~i - 2);< 1490#rec1ENTRY ~i := #in~i; 1466#L12 assume ~i <= 0;#res := 0; 1467#rec1FINAL assume true; 1493#rec1EXIT >#28#return; 1453#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 1454#rec1ENTRY ~i := #in~i; 1500#L12 assume ~i <= 0;#res := 0; 1499#rec1FINAL assume true; 1492#rec1EXIT >#30#return; 1469#L14-2 call #t~ret2 := rec1(#t~ret1);< 1470#rec1ENTRY ~i := #in~i; 1511#L12 assume ~i <= 0;#res := 0; 1510#rec1FINAL assume true; 1476#rec1EXIT >#32#return; 1463#L14-3 #res := #t~ret2 + 1;havoc #t~ret1;havoc #t~ret2;havoc #t~ret0; 1440#rec1FINAL assume true; 1449#rec1EXIT >#28#return; 1441#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 1489#rec1ENTRY [2018-11-10 12:09:15,517 INFO L795 eck$LassoCheckResult]: Loop: 1489#rec1ENTRY ~i := #in~i; 1498#L12 assume !(~i <= 0); 1443#L14 call #t~ret0 := rec1(~i - 2);< 1489#rec1ENTRY [2018-11-10 12:09:15,517 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 12:09:15,517 INFO L82 PathProgramCache]: Analyzing trace with hash 1060897207, now seen corresponding path program 1 times [2018-11-10 12:09:15,517 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 12:09:15,518 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 12:09:15,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:09:15,518 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 12:09:15,518 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:09:15,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-10 12:09:15,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-10 12:09:15,530 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 12:09:15,530 INFO L82 PathProgramCache]: Analyzing trace with hash 29942, now seen corresponding path program 3 times [2018-11-10 12:09:15,531 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 12:09:15,531 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 12:09:15,531 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:09:15,531 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-10 12:09:15,531 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:09:15,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-10 12:09:15,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-10 12:09:15,535 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 12:09:15,535 INFO L82 PathProgramCache]: Analyzing trace with hash -1475637376, now seen corresponding path program 2 times [2018-11-10 12:09:15,535 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 12:09:15,535 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 12:09:15,536 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:09:15,536 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 12:09:15,536 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:09:15,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 12:09:15,575 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2018-11-10 12:09:15,575 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 12:09:15,575 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_51f0187a-0fca-45e4-bc69-e97e3bab1b29/bin-2019/uautomizer/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 12:09:15,589 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-10 12:09:15,602 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-10 12:09:15,602 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 12:09:15,604 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 12:09:15,613 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2018-11-10 12:09:15,635 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 12:09:15,635 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-11-10 12:09:15,654 INFO L214 LassoAnalysis]: Preferences: [2018-11-10 12:09:15,654 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-10 12:09:15,654 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-10 12:09:15,654 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-10 12:09:15,654 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-10 12:09:15,654 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-10 12:09:15,654 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-10 12:09:15,655 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-10 12:09:15,655 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1d_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration6_Loop [2018-11-10 12:09:15,655 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-10 12:09:15,655 INFO L280 LassoAnalysis]: Starting lasso preprocessing... [2018-11-10 12:09:15,655 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-10 12:09:15,657 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-10 12:09:15,658 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-10 12:09:15,660 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-10 12:09:15,663 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-10 12:09:15,665 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-10 12:09:15,685 INFO L298 LassoAnalysis]: Preprocessing complete. [2018-11-10 12:09:15,685 INFO L410 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_51f0187a-0fca-45e4-bc69-e97e3bab1b29/bin-2019/uautomizer/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-10 12:09:15,687 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-10 12:09:15,687 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-10 12:09:15,691 INFO L443 LassoAnalysis]: Proved nontermination for one component. [2018-11-10 12:09:15,691 INFO L446 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_51f0187a-0fca-45e4-bc69-e97e3bab1b29/bin-2019/uautomizer/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-10 12:09:15,707 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-10 12:09:15,708 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-10 12:09:15,709 INFO L443 LassoAnalysis]: Proved nontermination for one component. [2018-11-10 12:09:15,709 INFO L446 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_51f0187a-0fca-45e4-bc69-e97e3bab1b29/bin-2019/uautomizer/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-10 12:09:15,726 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-10 12:09:15,726 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-10 12:09:15,728 INFO L443 LassoAnalysis]: Proved nontermination for one component. [2018-11-10 12:09:15,729 INFO L446 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_51f0187a-0fca-45e4-bc69-e97e3bab1b29/bin-2019/uautomizer/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-10 12:09:15,745 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-10 12:09:15,745 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_51f0187a-0fca-45e4-bc69-e97e3bab1b29/bin-2019/uautomizer/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-10 12:09:15,763 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-10 12:09:15,763 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-10 12:09:15,780 INFO L450 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-10 12:09:15,781 INFO L214 LassoAnalysis]: Preferences: [2018-11-10 12:09:15,782 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-10 12:09:15,782 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-10 12:09:15,782 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-10 12:09:15,782 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-10 12:09:15,782 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-10 12:09:15,782 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-10 12:09:15,782 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-10 12:09:15,782 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1d_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration6_Loop [2018-11-10 12:09:15,782 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-10 12:09:15,782 INFO L280 LassoAnalysis]: Starting lasso preprocessing... [2018-11-10 12:09:15,783 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-10 12:09:15,784 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-10 12:09:15,785 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-10 12:09:15,787 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-10 12:09:15,788 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-10 12:09:15,789 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-10 12:09:15,801 INFO L298 LassoAnalysis]: Preprocessing complete. [2018-11-10 12:09:15,801 INFO L496 LassoAnalysis]: Using template 'affine'. [2018-11-10 12:09:15,801 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-10 12:09:15,801 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-10 12:09:15,801 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-10 12:09:15,802 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-10 12:09:15,802 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-10 12:09:15,802 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-10 12:09:15,802 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-10 12:09:15,802 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-10 12:09:15,802 INFO L529 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-10 12:09:15,803 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-10 12:09:15,803 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-10 12:09:15,803 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-10 12:09:15,803 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-10 12:09:15,803 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-10 12:09:15,803 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-10 12:09:15,804 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-10 12:09:15,804 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-10 12:09:15,804 INFO L529 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-10 12:09:15,805 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-10 12:09:15,805 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-10 12:09:15,805 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-10 12:09:15,805 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-10 12:09:15,805 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-10 12:09:15,806 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-10 12:09:15,806 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-10 12:09:15,806 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-10 12:09:15,808 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-10 12:09:15,810 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2018-11-10 12:09:15,810 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2018-11-10 12:09:15,810 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-10 12:09:15,810 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-10 12:09:15,810 INFO L517 LassoAnalysis]: Proved termination. [2018-11-10 12:09:15,810 INFO L519 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] [2018-11-10 12:09:15,811 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-10 12:09:15,824 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 12:09:15,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 12:09:15,848 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 12:09:15,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 12:09:15,872 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 12:09:15,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 12:09:15,888 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2018-11-10 12:09:15,888 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 112 states and 162 transitions. cyclomatic complexity: 56 Second operand 5 states. [2018-11-10 12:09:15,925 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 112 states and 162 transitions. cyclomatic complexity: 56. Second operand 5 states. Result 129 states and 180 transitions. Complement of second has 7 states. [2018-11-10 12:09:15,925 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 [2018-11-10 12:09:15,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-11-10 12:09:15,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 16 transitions. [2018-11-10 12:09:15,926 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 16 transitions. Stem has 30 letters. Loop has 3 letters. [2018-11-10 12:09:15,926 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-10 12:09:15,926 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-10 12:09:15,934 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 12:09:15,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 12:09:15,961 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 12:09:15,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 12:09:15,994 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 12:09:16,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 12:09:16,006 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 [2018-11-10 12:09:16,006 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 112 states and 162 transitions. cyclomatic complexity: 56 Second operand 5 states. [2018-11-10 12:09:16,049 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 112 states and 162 transitions. cyclomatic complexity: 56. Second operand 5 states. Result 129 states and 180 transitions. Complement of second has 7 states. [2018-11-10 12:09:16,051 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 [2018-11-10 12:09:16,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-11-10 12:09:16,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 16 transitions. [2018-11-10 12:09:16,052 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 16 transitions. Stem has 30 letters. Loop has 3 letters. [2018-11-10 12:09:16,052 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-10 12:09:16,052 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-10 12:09:16,060 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 12:09:16,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 12:09:16,085 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 12:09:16,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 12:09:16,121 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 12:09:16,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 12:09:16,141 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 [2018-11-10 12:09:16,141 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 112 states and 162 transitions. cyclomatic complexity: 56 Second operand 5 states. [2018-11-10 12:09:16,208 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 112 states and 162 transitions. cyclomatic complexity: 56. Second operand 5 states. Result 157 states and 219 transitions. Complement of second has 13 states. [2018-11-10 12:09:16,208 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2018-11-10 12:09:16,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-11-10 12:09:16,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 25 transitions. [2018-11-10 12:09:16,209 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 25 transitions. Stem has 30 letters. Loop has 3 letters. [2018-11-10 12:09:16,209 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-10 12:09:16,209 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 25 transitions. Stem has 33 letters. Loop has 3 letters. [2018-11-10 12:09:16,209 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-10 12:09:16,210 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 25 transitions. Stem has 30 letters. Loop has 6 letters. [2018-11-10 12:09:16,210 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-10 12:09:16,210 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 157 states and 219 transitions. [2018-11-10 12:09:16,212 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 15 [2018-11-10 12:09:16,214 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 157 states to 139 states and 201 transitions. [2018-11-10 12:09:16,214 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 55 [2018-11-10 12:09:16,214 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 58 [2018-11-10 12:09:16,214 INFO L73 IsDeterministic]: Start isDeterministic. Operand 139 states and 201 transitions. [2018-11-10 12:09:16,215 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-10 12:09:16,215 INFO L705 BuchiCegarLoop]: Abstraction has 139 states and 201 transitions. [2018-11-10 12:09:16,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states and 201 transitions. [2018-11-10 12:09:16,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 120. [2018-11-10 12:09:16,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2018-11-10 12:09:16,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 170 transitions. [2018-11-10 12:09:16,224 INFO L728 BuchiCegarLoop]: Abstraction has 120 states and 170 transitions. [2018-11-10 12:09:16,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-10 12:09:16,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2018-11-10 12:09:16,225 INFO L87 Difference]: Start difference. First operand 120 states and 170 transitions. Second operand 8 states. [2018-11-10 12:09:16,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 12:09:16,286 INFO L93 Difference]: Finished difference Result 98 states and 116 transitions. [2018-11-10 12:09:16,286 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-10 12:09:16,286 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 98 states and 116 transitions. [2018-11-10 12:09:16,287 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2018-11-10 12:09:16,288 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 98 states to 63 states and 75 transitions. [2018-11-10 12:09:16,288 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 12 [2018-11-10 12:09:16,288 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 12 [2018-11-10 12:09:16,288 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 75 transitions. [2018-11-10 12:09:16,288 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-10 12:09:16,288 INFO L705 BuchiCegarLoop]: Abstraction has 63 states and 75 transitions. [2018-11-10 12:09:16,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states and 75 transitions. [2018-11-10 12:09:16,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 54. [2018-11-10 12:09:16,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-11-10 12:09:16,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2018-11-10 12:09:16,295 INFO L728 BuchiCegarLoop]: Abstraction has 54 states and 65 transitions. [2018-11-10 12:09:16,295 INFO L608 BuchiCegarLoop]: Abstraction has 54 states and 65 transitions. [2018-11-10 12:09:16,295 INFO L442 BuchiCegarLoop]: ======== Iteration 7============ [2018-11-10 12:09:16,295 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 54 states and 65 transitions. [2018-11-10 12:09:16,296 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2018-11-10 12:09:16,296 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-10 12:09:16,296 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-10 12:09:16,296 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-10 12:09:16,297 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2018-11-10 12:09:16,297 INFO L793 eck$LassoCheckResult]: Stem: 2669#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 2666#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 2641#L25 call main_#t~ret6 := rec2(main_~x~0);< 2640#rec2ENTRY ~j := #in~j; 2642#L18 assume !(~j <= 0); 2673#L20 call #t~ret3 := rec1(~j);< 2689#rec1ENTRY ~i := #in~i; 2687#L12 assume !(~i <= 0); 2656#L14 call #t~ret0 := rec1(~i - 2);< 2685#rec1ENTRY ~i := #in~i; 2688#L12 assume ~i <= 0;#res := 0; 2686#rec1FINAL assume true; 2667#rec1EXIT >#28#return; 2668#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 2660#rec1ENTRY ~i := #in~i; 2682#L12 assume ~i <= 0;#res := 0; 2681#rec1FINAL assume true; 2679#rec1EXIT >#30#return; 2677#L14-2 call #t~ret2 := rec1(#t~ret1);< 2665#rec1ENTRY ~i := #in~i; 2680#L12 assume ~i <= 0;#res := 0; 2678#rec1FINAL assume true; 2676#rec1EXIT >#32#return; 2675#L14-3 #res := #t~ret2 + 1;havoc #t~ret1;havoc #t~ret2;havoc #t~ret0; 2674#rec1FINAL assume true; 2672#rec1EXIT >#34#return; 2644#L20-1 call #t~ret4 := rec2(#t~ret3 - 1);< 2643#rec2ENTRY ~j := #in~j; 2645#L18 assume !(~j <= 0); 2648#L20 call #t~ret3 := rec1(~j);< 2647#rec1ENTRY [2018-11-10 12:09:16,297 INFO L795 eck$LassoCheckResult]: Loop: 2647#rec1ENTRY ~i := #in~i; 2649#L12 assume !(~i <= 0); 2650#L14 call #t~ret0 := rec1(~i - 2);< 2647#rec1ENTRY [2018-11-10 12:09:16,297 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 12:09:16,297 INFO L82 PathProgramCache]: Analyzing trace with hash 1256061253, now seen corresponding path program 2 times [2018-11-10 12:09:16,297 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 12:09:16,297 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 12:09:16,298 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:09:16,298 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 12:09:16,298 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:09:16,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 12:09:16,330 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-11-10 12:09:16,331 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-10 12:09:16,331 INFO L225 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_51f0187a-0fca-45e4-bc69-e97e3bab1b29/bin-2019/uautomizer/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-10 12:09:16,344 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-10 12:09:16,354 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-10 12:09:16,354 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-10 12:09:16,356 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 12:09:16,360 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-11-10 12:09:16,377 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-10 12:09:16,377 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-11-10 12:09:16,377 INFO L798 eck$LassoCheckResult]: stem already infeasible [2018-11-10 12:09:16,377 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 12:09:16,378 INFO L82 PathProgramCache]: Analyzing trace with hash 29942, now seen corresponding path program 4 times [2018-11-10 12:09:16,378 INFO L225 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-10 12:09:16,378 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-10 12:09:16,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:09:16,378 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-10 12:09:16,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-10 12:09:16,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-10 12:09:16,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-10 12:09:16,394 INFO L214 LassoAnalysis]: Preferences: [2018-11-10 12:09:16,394 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-10 12:09:16,394 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-10 12:09:16,395 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-10 12:09:16,395 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-10 12:09:16,395 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-10 12:09:16,395 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-10 12:09:16,395 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-10 12:09:16,395 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1d_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration7_Loop [2018-11-10 12:09:16,395 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-10 12:09:16,395 INFO L280 LassoAnalysis]: Starting lasso preprocessing... [2018-11-10 12:09:16,396 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-10 12:09:16,399 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-10 12:09:16,401 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-10 12:09:16,402 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-10 12:09:16,403 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-10 12:09:16,407 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-10 12:09:16,423 INFO L298 LassoAnalysis]: Preprocessing complete. [2018-11-10 12:09:16,423 INFO L410 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_51f0187a-0fca-45e4-bc69-e97e3bab1b29/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 [2018-11-10 12:09:16,431 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-10 12:09:16,431 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-10 12:09:16,434 INFO L443 LassoAnalysis]: Proved nontermination for one component. [2018-11-10 12:09:16,434 INFO L446 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_51f0187a-0fca-45e4-bc69-e97e3bab1b29/bin-2019/uautomizer/z3 Starting monitored process 28 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 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-10 12:09:16,451 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-10 12:09:16,451 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-10 12:09:16,453 INFO L443 LassoAnalysis]: Proved nontermination for one component. [2018-11-10 12:09:16,453 INFO L446 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_51f0187a-0fca-45e4-bc69-e97e3bab1b29/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 [2018-11-10 12:09:16,471 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-10 12:09:16,471 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-10 12:09:16,473 INFO L443 LassoAnalysis]: Proved nontermination for one component. [2018-11-10 12:09:16,473 INFO L446 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_51f0187a-0fca-45e4-bc69-e97e3bab1b29/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 [2018-11-10 12:09:16,491 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-10 12:09:16,491 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-10 12:09:16,493 INFO L443 LassoAnalysis]: Proved nontermination for one component. [2018-11-10 12:09:16,494 INFO L446 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_51f0187a-0fca-45e4-bc69-e97e3bab1b29/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 [2018-11-10 12:09:16,519 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-10 12:09:16,520 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_51f0187a-0fca-45e4-bc69-e97e3bab1b29/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) Waiting until toolchain timeout for monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-10 12:09:16,545 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-10 12:09:16,545 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-10 12:09:16,562 INFO L450 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-10 12:09:16,563 INFO L214 LassoAnalysis]: Preferences: [2018-11-10 12:09:16,564 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-10 12:09:16,564 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-10 12:09:16,564 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-10 12:09:16,564 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-10 12:09:16,564 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-10 12:09:16,564 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-10 12:09:16,564 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-10 12:09:16,564 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1d_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration7_Loop [2018-11-10 12:09:16,564 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-10 12:09:16,564 INFO L280 LassoAnalysis]: Starting lasso preprocessing... [2018-11-10 12:09:16,565 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-10 12:09:16,566 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-10 12:09:16,567 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-10 12:09:16,567 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-10 12:09:16,571 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-10 12:09:16,575 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-10 12:09:16,589 INFO L298 LassoAnalysis]: Preprocessing complete. [2018-11-10 12:09:16,589 INFO L496 LassoAnalysis]: Using template 'affine'. [2018-11-10 12:09:16,590 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-10 12:09:16,590 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-10 12:09:16,590 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-10 12:09:16,590 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-10 12:09:16,591 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-10 12:09:16,591 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-10 12:09:16,591 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-10 12:09:16,591 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-10 12:09:16,591 INFO L529 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-10 12:09:16,591 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-10 12:09:16,592 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-10 12:09:16,592 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-10 12:09:16,592 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-10 12:09:16,592 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-10 12:09:16,592 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-10 12:09:16,592 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-10 12:09:16,592 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-10 12:09:16,593 INFO L529 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-10 12:09:16,593 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-10 12:09:16,593 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-10 12:09:16,593 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-10 12:09:16,593 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-10 12:09:16,593 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-10 12:09:16,593 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-10 12:09:16,594 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-10 12:09:16,594 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-10 12:09:16,594 INFO L529 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-10 12:09:16,594 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-10 12:09:16,595 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-10 12:09:16,595 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-10 12:09:16,595 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-10 12:09:16,595 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-10 12:09:16,595 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-10 12:09:16,595 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-10 12:09:16,595 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-10 12:09:16,595 INFO L529 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-10 12:09:16,596 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-10 12:09:16,596 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-10 12:09:16,596 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-10 12:09:16,596 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-10 12:09:16,596 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-10 12:09:16,596 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-10 12:09:16,596 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-10 12:09:16,597 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-10 12:09:16,598 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-10 12:09:16,602 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2018-11-10 12:09:16,602 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2018-11-10 12:09:16,602 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-10 12:09:16,602 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-10 12:09:16,602 INFO L517 LassoAnalysis]: Proved termination. [2018-11-10 12:09:16,602 INFO L519 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] [2018-11-10 12:09:16,603 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-10 12:09:16,616 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 12:09:16,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 12:09:16,635 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 12:09:16,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 12:09:16,654 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 12:09:16,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 12:09:16,672 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2018-11-10 12:09:16,672 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 54 states and 65 transitions. cyclomatic complexity: 15 Second operand 5 states. [2018-11-10 12:09:16,705 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 54 states and 65 transitions. cyclomatic complexity: 15. Second operand 5 states. Result 64 states and 76 transitions. Complement of second has 13 states. [2018-11-10 12:09:16,705 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2018-11-10 12:09:16,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-11-10 12:09:16,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 11 transitions. [2018-11-10 12:09:16,705 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 11 transitions. Stem has 30 letters. Loop has 3 letters. [2018-11-10 12:09:16,705 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-10 12:09:16,706 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-10 12:09:16,712 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 12:09:16,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 12:09:16,732 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 12:09:16,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 12:09:16,750 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 12:09:16,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 12:09:16,759 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 [2018-11-10 12:09:16,759 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 54 states and 65 transitions. cyclomatic complexity: 15 Second operand 5 states. [2018-11-10 12:09:16,790 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 54 states and 65 transitions. cyclomatic complexity: 15. Second operand 5 states. Result 64 states and 76 transitions. Complement of second has 13 states. [2018-11-10 12:09:16,791 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2018-11-10 12:09:16,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-11-10 12:09:16,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 11 transitions. [2018-11-10 12:09:16,792 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 11 transitions. Stem has 30 letters. Loop has 3 letters. [2018-11-10 12:09:16,792 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-10 12:09:16,792 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-10 12:09:16,798 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-10 12:09:16,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 12:09:16,816 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 12:09:16,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-10 12:09:16,833 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-10 12:09:16,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-10 12:09:16,842 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 [2018-11-10 12:09:16,842 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 54 states and 65 transitions. cyclomatic complexity: 15 Second operand 5 states. [2018-11-10 12:09:16,887 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 54 states and 65 transitions. cyclomatic complexity: 15. Second operand 5 states. Result 78 states and 90 transitions. Complement of second has 13 states. [2018-11-10 12:09:16,887 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2018-11-10 12:09:16,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-11-10 12:09:16,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 25 transitions. [2018-11-10 12:09:16,888 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 25 transitions. Stem has 30 letters. Loop has 3 letters. [2018-11-10 12:09:16,888 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-10 12:09:16,888 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 25 transitions. Stem has 33 letters. Loop has 3 letters. [2018-11-10 12:09:16,889 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-10 12:09:16,889 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 25 transitions. Stem has 30 letters. Loop has 6 letters. [2018-11-10 12:09:16,889 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-10 12:09:16,889 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 78 states and 90 transitions. [2018-11-10 12:09:16,890 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2018-11-10 12:09:16,890 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 78 states to 0 states and 0 transitions. [2018-11-10 12:09:16,890 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2018-11-10 12:09:16,890 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2018-11-10 12:09:16,890 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2018-11-10 12:09:16,890 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2018-11-10 12:09:16,890 INFO L705 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-10 12:09:16,890 INFO L728 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-10 12:09:16,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-10 12:09:16,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2018-11-10 12:09:16,891 INFO L87 Difference]: Start difference. First operand 0 states and 0 transitions. Second operand 8 states. [2018-11-10 12:09:16,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-10 12:09:16,891 INFO L93 Difference]: Finished difference Result 0 states and 0 transitions. [2018-11-10 12:09:16,891 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-11-10 12:09:16,891 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 0 states and 0 transitions. [2018-11-10 12:09:16,891 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2018-11-10 12:09:16,891 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 0 states to 0 states and 0 transitions. [2018-11-10 12:09:16,891 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2018-11-10 12:09:16,891 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2018-11-10 12:09:16,891 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2018-11-10 12:09:16,891 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2018-11-10 12:09:16,892 INFO L705 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-10 12:09:16,892 INFO L728 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-10 12:09:16,892 INFO L608 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-10 12:09:16,892 INFO L442 BuchiCegarLoop]: ======== Iteration 8============ [2018-11-10 12:09:16,892 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2018-11-10 12:09:16,892 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2018-11-10 12:09:16,892 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2018-11-10 12:09:16,896 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 10.11 12:09:16 BoogieIcfgContainer [2018-11-10 12:09:16,896 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2018-11-10 12:09:16,897 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-10 12:09:16,897 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-10 12:09:16,897 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-10 12:09:16,897 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 12:09:13" (3/4) ... [2018-11-10 12:09:16,899 INFO L147 WitnessPrinter]: No result that supports witness generation found [2018-11-10 12:09:16,899 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-10 12:09:16,900 INFO L168 Benchmark]: Toolchain (without parser) took 4087.20 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 203.4 MB). Free memory was 961.9 MB in the beginning and 1.0 GB in the end (delta: -38.3 MB). Peak memory consumption was 165.1 MB. Max. memory is 11.5 GB. [2018-11-10 12:09:16,901 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 982.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 12:09:16,901 INFO L168 Benchmark]: CACSL2BoogieTranslator took 134.45 ms. Allocated memory is still 1.0 GB. Free memory was 961.9 MB in the beginning and 951.2 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-10 12:09:16,901 INFO L168 Benchmark]: Boogie Procedure Inliner took 23.92 ms. Allocated memory is still 1.0 GB. Free memory was 951.2 MB in the beginning and 950.1 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 11.5 GB. [2018-11-10 12:09:16,902 INFO L168 Benchmark]: Boogie Preprocessor took 12.46 ms. Allocated memory is still 1.0 GB. Free memory was 950.1 MB in the beginning and 944.7 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2018-11-10 12:09:16,902 INFO L168 Benchmark]: RCFGBuilder took 193.70 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 161.0 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -203.9 MB). Peak memory consumption was 19.9 MB. Max. memory is 11.5 GB. [2018-11-10 12:09:16,903 INFO L168 Benchmark]: BuchiAutomizer took 3716.85 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 42.5 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 148.5 MB). Peak memory consumption was 190.9 MB. Max. memory is 11.5 GB. [2018-11-10 12:09:16,903 INFO L168 Benchmark]: Witness Printer took 2.70 ms. Allocated memory is still 1.2 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-10 12:09:16,905 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 982.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 134.45 ms. Allocated memory is still 1.0 GB. Free memory was 961.9 MB in the beginning and 951.2 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 23.92 ms. Allocated memory is still 1.0 GB. Free memory was 951.2 MB in the beginning and 950.1 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 12.46 ms. Allocated memory is still 1.0 GB. Free memory was 950.1 MB in the beginning and 944.7 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 193.70 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 161.0 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -203.9 MB). Peak memory consumption was 19.9 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 3716.85 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 42.5 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 148.5 MB). Peak memory consumption was 190.9 MB. Max. memory is 11.5 GB. * Witness Printer took 2.70 ms. Allocated memory is still 1.2 GB. Free memory is still 1.0 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 10 terminating modules (5 trivial, 3 deterministic, 2 nondeterministic). One deterministic module has affine ranking function \old(j) and consists of 10 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 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 5 locations. 5 modules have a trivial ranking function, the largest among these consists of 8 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 3.6s and 8 iterations. TraceHistogramMax:5. Analysis of lassos took 1.8s. Construction of modules took 0.2s. Büchi inclusion checks took 1.3s. Highest rank in rank-based complementation 3. Minimization of det autom 3. Minimization of nondet autom 7. Automata minimization 0.0s AutomataMinimizationTime, 8 MinimizatonAttempts, 89 StatesRemovedByMinimization, 7 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 112 states and ocurred in iteration 5. Nontrivial modules had stage [3, 0, 2, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 22/24 HoareTripleCheckerStatistics: 201 SDtfs, 193 SDslu, 335 SDs, 0 SdLazy, 312 SolverSat, 134 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time LassoAnalysisResults: nont0 unkn0 SFLI2 SFLT2 conc0 concLT2 SILN0 SILU0 SILI0 SILT1 lasso0 LassoPreprocessingBenchmarks: Lassos: inital10 mio100 ax100 hnf100 lsp100 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq155 hnf93 smp100 dnf100 smp100 tf113 neg100 sie111 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 6ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 18 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 5 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.2s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...