./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/termination-crafted/NestedRecursion_1b.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 6b5699aa Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_a6b645b8-0144-4e06-8cd2-74b3624256ca/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_a6b645b8-0144-4e06-8cd2-74b3624256ca/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_a6b645b8-0144-4e06-8cd2-74b3624256ca/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_a6b645b8-0144-4e06-8cd2-74b3624256ca/bin/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-crafted/NestedRecursion_1b.c -s /tmp/vcloud-vcloud-master/worker/run_dir_a6b645b8-0144-4e06-8cd2-74b3624256ca/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_a6b645b8-0144-4e06-8cd2-74b3624256ca/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(F end) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash cb528549fa76ae8087cf7043645dfa20323a0116 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-6b5699a [2019-11-25 08:51:59,486 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-25 08:51:59,487 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-25 08:51:59,501 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-25 08:51:59,502 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-25 08:51:59,503 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-25 08:51:59,504 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-25 08:51:59,512 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-25 08:51:59,517 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-25 08:51:59,520 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-25 08:51:59,521 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-25 08:51:59,522 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-25 08:51:59,523 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-25 08:51:59,525 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-25 08:51:59,525 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-25 08:51:59,526 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-25 08:51:59,527 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-25 08:51:59,528 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-25 08:51:59,530 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-25 08:51:59,534 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-25 08:51:59,537 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-25 08:51:59,540 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-25 08:51:59,542 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-25 08:51:59,542 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-25 08:51:59,544 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-25 08:51:59,545 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-25 08:51:59,545 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-25 08:51:59,546 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-25 08:51:59,546 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-25 08:51:59,547 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-25 08:51:59,547 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-25 08:51:59,548 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-25 08:51:59,549 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-25 08:51:59,549 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-25 08:51:59,550 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-25 08:51:59,550 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-25 08:51:59,551 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-25 08:51:59,551 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-25 08:51:59,551 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-25 08:51:59,552 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-25 08:51:59,553 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-25 08:51:59,554 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_a6b645b8-0144-4e06-8cd2-74b3624256ca/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf [2019-11-25 08:51:59,579 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-25 08:51:59,579 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-25 08:51:59,580 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-25 08:51:59,580 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-25 08:51:59,580 INFO L138 SettingsManager]: * Use SBE=true [2019-11-25 08:51:59,580 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2019-11-25 08:51:59,580 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2019-11-25 08:51:59,581 INFO L138 SettingsManager]: * Use old map elimination=false [2019-11-25 08:51:59,581 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2019-11-25 08:51:59,581 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2019-11-25 08:51:59,581 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2019-11-25 08:51:59,581 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-25 08:51:59,582 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-25 08:51:59,582 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-25 08:51:59,582 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-25 08:51:59,582 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2019-11-25 08:51:59,582 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2019-11-25 08:51:59,582 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2019-11-25 08:51:59,583 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-25 08:51:59,583 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2019-11-25 08:51:59,583 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-25 08:51:59,583 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2019-11-25 08:51:59,583 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-25 08:51:59,583 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-25 08:51:59,584 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2019-11-25 08:51:59,584 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-25 08:51:59,584 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-25 08:51:59,584 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2019-11-25 08:51:59,585 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2019-11-25 08:51:59,585 INFO L138 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/run_dir_a6b645b8-0144-4e06-8cd2-74b3624256ca/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cb528549fa76ae8087cf7043645dfa20323a0116 [2019-11-25 08:51:59,724 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-25 08:51:59,734 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-25 08:51:59,736 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-25 08:51:59,738 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-25 08:51:59,738 INFO L275 PluginConnector]: CDTParser initialized [2019-11-25 08:51:59,739 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_a6b645b8-0144-4e06-8cd2-74b3624256ca/bin/uautomizer/../../sv-benchmarks/c/termination-crafted/NestedRecursion_1b.c [2019-11-25 08:51:59,787 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a6b645b8-0144-4e06-8cd2-74b3624256ca/bin/uautomizer/data/da7c0210c/bcfe7523421945edb50c13e421b26a3e/FLAGb17a611fb [2019-11-25 08:52:00,192 INFO L306 CDTParser]: Found 1 translation units. [2019-11-25 08:52:00,193 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_a6b645b8-0144-4e06-8cd2-74b3624256ca/sv-benchmarks/c/termination-crafted/NestedRecursion_1b.c [2019-11-25 08:52:00,199 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a6b645b8-0144-4e06-8cd2-74b3624256ca/bin/uautomizer/data/da7c0210c/bcfe7523421945edb50c13e421b26a3e/FLAGb17a611fb [2019-11-25 08:52:00,216 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_a6b645b8-0144-4e06-8cd2-74b3624256ca/bin/uautomizer/data/da7c0210c/bcfe7523421945edb50c13e421b26a3e [2019-11-25 08:52:00,219 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-25 08:52:00,221 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-25 08:52:00,226 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-25 08:52:00,226 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-25 08:52:00,231 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-25 08:52:00,231 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:52:00" (1/1) ... [2019-11-25 08:52:00,234 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5585bc10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:52:00, skipping insertion in model container [2019-11-25 08:52:00,234 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:52:00" (1/1) ... [2019-11-25 08:52:00,240 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-25 08:52:00,256 INFO L179 MainTranslator]: Built tables and reachable declarations [2019-11-25 08:52:00,389 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-25 08:52:00,392 INFO L201 MainTranslator]: Completed pre-run [2019-11-25 08:52:00,467 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-25 08:52:00,484 INFO L205 MainTranslator]: Completed translation [2019-11-25 08:52:00,485 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:52:00 WrapperNode [2019-11-25 08:52:00,485 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-25 08:52:00,486 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-25 08:52:00,486 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-25 08:52:00,486 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-25 08:52:00,495 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:52:00" (1/1) ... [2019-11-25 08:52:00,500 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:52:00" (1/1) ... [2019-11-25 08:52:00,515 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-25 08:52:00,516 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-25 08:52:00,516 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-25 08:52:00,516 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-25 08:52:00,523 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:52:00" (1/1) ... [2019-11-25 08:52:00,523 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:52:00" (1/1) ... [2019-11-25 08:52:00,524 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:52:00" (1/1) ... [2019-11-25 08:52:00,524 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:52:00" (1/1) ... [2019-11-25 08:52:00,526 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:52:00" (1/1) ... [2019-11-25 08:52:00,527 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:52:00" (1/1) ... [2019-11-25 08:52:00,527 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:52:00" (1/1) ... [2019-11-25 08:52:00,528 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-25 08:52:00,529 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-25 08:52:00,529 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-25 08:52:00,529 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-25 08:52:00,530 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:52:00" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a6b645b8-0144-4e06-8cd2-74b3624256ca/bin/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 [2019-11-25 08:52:00,586 INFO L130 BoogieDeclarations]: Found specification of procedure rec1 [2019-11-25 08:52:00,586 INFO L138 BoogieDeclarations]: Found implementation of procedure rec1 [2019-11-25 08:52:00,586 INFO L130 BoogieDeclarations]: Found specification of procedure rec2 [2019-11-25 08:52:00,587 INFO L138 BoogieDeclarations]: Found implementation of procedure rec2 [2019-11-25 08:52:00,587 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-25 08:52:00,588 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-25 08:52:00,766 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-25 08:52:00,766 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-25 08:52:00,767 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:52:00 BoogieIcfgContainer [2019-11-25 08:52:00,767 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-25 08:52:00,768 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2019-11-25 08:52:00,768 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2019-11-25 08:52:00,771 INFO L275 PluginConnector]: BuchiAutomizer initialized [2019-11-25 08:52:00,772 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-25 08:52:00,772 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 25.11 08:52:00" (1/3) ... [2019-11-25 08:52:00,773 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@6c846b0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 25.11 08:52:00, skipping insertion in model container [2019-11-25 08:52:00,773 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-25 08:52:00,773 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:52:00" (2/3) ... [2019-11-25 08:52:00,773 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@6c846b0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 25.11 08:52:00, skipping insertion in model container [2019-11-25 08:52:00,774 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-25 08:52:00,774 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:52:00" (3/3) ... [2019-11-25 08:52:00,775 INFO L371 chiAutomizerObserver]: Analyzing ICFG NestedRecursion_1b.c [2019-11-25 08:52:00,835 INFO L356 BuchiCegarLoop]: Interprodecural is true [2019-11-25 08:52:00,836 INFO L357 BuchiCegarLoop]: Hoare is false [2019-11-25 08:52:00,836 INFO L358 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2019-11-25 08:52:00,836 INFO L359 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-25 08:52:00,836 INFO L360 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-25 08:52:00,836 INFO L361 BuchiCegarLoop]: Difference is false [2019-11-25 08:52:00,836 INFO L362 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-25 08:52:00,836 INFO L365 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2019-11-25 08:52:00,852 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 21 states. [2019-11-25 08:52:00,873 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2019-11-25 08:52:00,874 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-25 08:52:00,874 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-25 08:52:00,881 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2019-11-25 08:52:00,882 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:52:00,882 INFO L424 BuchiCegarLoop]: ======== Iteration 1============ [2019-11-25 08:52:00,882 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 21 states. [2019-11-25 08:52:00,886 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2019-11-25 08:52:00,886 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-25 08:52:00,886 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-25 08:52:00,887 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2019-11-25 08:52:00,887 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:52:00,895 INFO L794 eck$LassoCheckResult]: Stem: 13#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 22#L25true call main_#t~ret6 := rec2(main_~x~0);< 3#rec2ENTRYtrue [2019-11-25 08:52:00,895 INFO L796 eck$LassoCheckResult]: Loop: 3#rec2ENTRYtrue ~j := #in~j; 20#L18true assume !(~j <= 0); 18#L20true call #t~ret3 := rec1(~j - 1);< 4#rec1ENTRYtrue ~i := #in~i; 9#L12true assume ~i <= 0;#res := 0; 5#rec1FINALtrue assume true; 12#rec1EXITtrue >#33#return; 23#L20-1true call #t~ret4 := rec2(#t~ret3);< 3#rec2ENTRYtrue [2019-11-25 08:52:00,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:52:00,900 INFO L82 PathProgramCache]: Analyzing trace with hash 1617, now seen corresponding path program 1 times [2019-11-25 08:52:00,906 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:52:00,907 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041163093] [2019-11-25 08:52:00,907 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:52:00,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:52:00,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:52:00,981 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-25 08:52:00,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:52:00,982 INFO L82 PathProgramCache]: Analyzing trace with hash -1102838740, now seen corresponding path program 1 times [2019-11-25 08:52:00,982 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:52:00,982 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011664879] [2019-11-25 08:52:00,983 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:52:00,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:52:01,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:52:01,003 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-25 08:52:01,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:52:01,004 INFO L82 PathProgramCache]: Analyzing trace with hash -1371489668, now seen corresponding path program 1 times [2019-11-25 08:52:01,004 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:52:01,005 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234972054] [2019-11-25 08:52:01,005 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:52:01,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:52:01,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:52:01,019 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-25 08:52:01,188 INFO L210 LassoAnalysis]: Preferences: [2019-11-25 08:52:01,189 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-25 08:52:01,189 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-25 08:52:01,189 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-25 08:52:01,189 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-25 08:52:01,189 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:52:01,190 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-25 08:52:01,190 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-25 08:52:01,190 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration1_Loop [2019-11-25 08:52:01,190 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-25 08:52:01,190 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-25 08:52:01,204 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:52:01,208 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:52:01,211 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:52:01,216 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:52:01,218 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:52:01,374 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-25 08:52:01,374 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a6b645b8-0144-4e06-8cd2-74b3624256ca/bin/uautomizer/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-25 08:52:01,398 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-25 08:52:01,398 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:52:01,412 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-25 08:52:01,413 INFO L440 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/run_dir_a6b645b8-0144-4e06-8cd2-74b3624256ca/bin/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 [2019-11-25 08:52:01,427 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-25 08:52:01,428 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-25 08:52:01,431 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-25 08:52:01,431 INFO L440 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/run_dir_a6b645b8-0144-4e06-8cd2-74b3624256ca/bin/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 [2019-11-25 08:52:01,436 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-25 08:52:01,436 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-25 08:52:01,439 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-25 08:52:01,439 INFO L440 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/run_dir_a6b645b8-0144-4e06-8cd2-74b3624256ca/bin/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 [2019-11-25 08:52:01,445 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-25 08:52:01,445 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-25 08:52:01,448 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-25 08:52:01,448 INFO L440 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/run_dir_a6b645b8-0144-4e06-8cd2-74b3624256ca/bin/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 [2019-11-25 08:52:01,453 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-25 08:52:01,453 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a6b645b8-0144-4e06-8cd2-74b3624256ca/bin/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 [2019-11-25 08:52:01,465 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-25 08:52:01,465 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-25 08:52:01,473 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-25 08:52:01,475 INFO L210 LassoAnalysis]: Preferences: [2019-11-25 08:52:01,475 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-25 08:52:01,475 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-25 08:52:01,475 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-25 08:52:01,476 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-25 08:52:01,476 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:52:01,476 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-25 08:52:01,476 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-25 08:52:01,476 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration1_Loop [2019-11-25 08:52:01,476 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-25 08:52:01,476 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-25 08:52:01,477 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:52:01,495 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:52:01,497 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:52:01,501 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:52:01,510 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:52:01,556 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-25 08:52:01,561 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a6b645b8-0144-4e06-8cd2-74b3624256ca/bin/uautomizer/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-25 08:52:01,567 INFO L120 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 [2019-11-25 08:52:01,569 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-25 08:52:01,569 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-25 08:52:01,570 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-25 08:52:01,570 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-25 08:52:01,570 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-25 08:52:01,572 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-25 08:52:01,572 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:52:01,576 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a6b645b8-0144-4e06-8cd2-74b3624256ca/bin/uautomizer/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-25 08:52:01,594 INFO L120 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 [2019-11-25 08:52:01,595 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-25 08:52:01,596 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-25 08:52:01,596 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-25 08:52:01,596 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-25 08:52:01,596 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-25 08:52:01,599 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-25 08:52:01,599 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:52:01,603 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a6b645b8-0144-4e06-8cd2-74b3624256ca/bin/uautomizer/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-25 08:52:01,619 INFO L120 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 [2019-11-25 08:52:01,621 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-25 08:52:01,621 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-25 08:52:01,621 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-25 08:52:01,621 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-25 08:52:01,621 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-25 08:52:01,624 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-25 08:52:01,624 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:52:01,627 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a6b645b8-0144-4e06-8cd2-74b3624256ca/bin/uautomizer/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-25 08:52:01,644 INFO L120 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 [2019-11-25 08:52:01,645 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-25 08:52:01,645 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-25 08:52:01,646 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-25 08:52:01,646 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-25 08:52:01,646 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-25 08:52:01,650 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-25 08:52:01,650 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:52:01,653 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-25 08:52:01,656 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2019-11-25 08:52:01,657 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a6b645b8-0144-4e06-8cd2-74b3624256ca/bin/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 [2019-11-25 08:52:01,665 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-25 08:52:01,666 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-25 08:52:01,666 INFO L510 LassoAnalysis]: Proved termination. [2019-11-25 08:52:01,667 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec2_#in~j) = 1*rec2_#in~j Supporting invariants [] [2019-11-25 08:52:01,671 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-25 08:52:01,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:52:01,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:01,727 INFO L255 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-25 08:52:01,728 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:52:01,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:01,761 INFO L255 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-25 08:52:01,764 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:52:01,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:52:01,865 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 6 loop predicates [2019-11-25 08:52:01,866 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 21 states. Second operand 7 states. [2019-11-25 08:52:02,413 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 21 states.. Second operand 7 states. Result 194 states and 279 transitions. Complement of second has 61 states. [2019-11-25 08:52:02,413 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 11 states 1 stem states 9 non-accepting loop states 1 accepting loop states [2019-11-25 08:52:02,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2019-11-25 08:52:02,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 57 transitions. [2019-11-25 08:52:02,419 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 57 transitions. Stem has 2 letters. Loop has 8 letters. [2019-11-25 08:52:02,421 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-25 08:52:02,421 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 57 transitions. Stem has 10 letters. Loop has 8 letters. [2019-11-25 08:52:02,422 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-25 08:52:02,422 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 57 transitions. Stem has 2 letters. Loop has 16 letters. [2019-11-25 08:52:02,422 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-25 08:52:02,423 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 194 states and 279 transitions. [2019-11-25 08:52:02,451 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2019-11-25 08:52:02,461 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 194 states to 82 states and 120 transitions. [2019-11-25 08:52:02,462 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 35 [2019-11-25 08:52:02,463 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 38 [2019-11-25 08:52:02,464 INFO L73 IsDeterministic]: Start isDeterministic. Operand 82 states and 120 transitions. [2019-11-25 08:52:02,464 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-25 08:52:02,464 INFO L688 BuchiCegarLoop]: Abstraction has 82 states and 120 transitions. [2019-11-25 08:52:02,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states and 120 transitions. [2019-11-25 08:52:02,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 55. [2019-11-25 08:52:02,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-11-25 08:52:02,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 83 transitions. [2019-11-25 08:52:02,503 INFO L711 BuchiCegarLoop]: Abstraction has 55 states and 83 transitions. [2019-11-25 08:52:02,504 INFO L591 BuchiCegarLoop]: Abstraction has 55 states and 83 transitions. [2019-11-25 08:52:02,504 INFO L424 BuchiCegarLoop]: ======== Iteration 2============ [2019-11-25 08:52:02,504 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 55 states and 83 transitions. [2019-11-25 08:52:02,506 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2019-11-25 08:52:02,508 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-25 08:52:02,508 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-25 08:52:02,508 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:52:02,509 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-11-25 08:52:02,509 INFO L794 eck$LassoCheckResult]: Stem: 378#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 345#L25 call main_#t~ret6 := rec2(main_~x~0);< 344#rec2ENTRY ~j := #in~j; 347#L18 assume !(~j <= 0); 363#L20 call #t~ret3 := rec1(~j - 1);< 379#rec1ENTRY ~i := #in~i; 397#L12 assume !(~i <= 0); 351#L14 call #t~ret0 := rec1(~i - 2);< 350#rec1ENTRY [2019-11-25 08:52:02,509 INFO L796 eck$LassoCheckResult]: Loop: 350#rec1ENTRY ~i := #in~i; 358#L12 assume !(~i <= 0); 354#L14 call #t~ret0 := rec1(~i - 2);< 350#rec1ENTRY [2019-11-25 08:52:02,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:52:02,510 INFO L82 PathProgramCache]: Analyzing trace with hash 874549579, now seen corresponding path program 1 times [2019-11-25 08:52:02,510 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:52:02,511 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816401469] [2019-11-25 08:52:02,511 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:52:02,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:52:02,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:52:02,533 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-25 08:52:02,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:52:02,536 INFO L82 PathProgramCache]: Analyzing trace with hash 29941, now seen corresponding path program 1 times [2019-11-25 08:52:02,537 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:52:02,537 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199037879] [2019-11-25 08:52:02,537 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:52:02,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:52:02,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:52:02,542 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-25 08:52:02,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:52:02,543 INFO L82 PathProgramCache]: Analyzing trace with hash 434890603, now seen corresponding path program 2 times [2019-11-25 08:52:02,543 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:52:02,543 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481088494] [2019-11-25 08:52:02,543 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:52:02,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:52:02,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:52:02,562 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-25 08:52:02,589 INFO L210 LassoAnalysis]: Preferences: [2019-11-25 08:52:02,589 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-25 08:52:02,589 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-25 08:52:02,589 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-25 08:52:02,589 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-25 08:52:02,590 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:52:02,590 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-25 08:52:02,590 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-25 08:52:02,590 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration2_Loop [2019-11-25 08:52:02,590 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-25 08:52:02,590 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-25 08:52:02,591 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:52:02,593 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:52:02,595 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:52:02,597 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:52:02,600 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:52:02,602 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:52:02,634 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-25 08:52:02,634 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a6b645b8-0144-4e06-8cd2-74b3624256ca/bin/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 [2019-11-25 08:52:02,641 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-25 08:52:02,641 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-25 08:52:02,649 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-25 08:52:02,649 INFO L440 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/run_dir_a6b645b8-0144-4e06-8cd2-74b3624256ca/bin/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 [2019-11-25 08:52:02,665 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-25 08:52:02,665 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-25 08:52:02,669 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-25 08:52:02,669 INFO L440 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/run_dir_a6b645b8-0144-4e06-8cd2-74b3624256ca/bin/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 [2019-11-25 08:52:02,682 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-25 08:52:02,682 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-25 08:52:02,694 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-25 08:52:02,695 INFO L440 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/run_dir_a6b645b8-0144-4e06-8cd2-74b3624256ca/bin/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 [2019-11-25 08:52:02,705 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-25 08:52:02,706 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-25 08:52:02,709 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-25 08:52:02,709 INFO L440 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/run_dir_a6b645b8-0144-4e06-8cd2-74b3624256ca/bin/uautomizer/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-25 08:52:02,730 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-25 08:52:02,731 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:52:02,735 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-25 08:52:02,735 INFO L440 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/run_dir_a6b645b8-0144-4e06-8cd2-74b3624256ca/bin/uautomizer/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-25 08:52:02,754 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-25 08:52:02,754 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a6b645b8-0144-4e06-8cd2-74b3624256ca/bin/uautomizer/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:52:02,782 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-25 08:52:02,782 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-25 08:52:02,797 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-25 08:52:02,799 INFO L210 LassoAnalysis]: Preferences: [2019-11-25 08:52:02,799 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-25 08:52:02,799 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-25 08:52:02,800 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-25 08:52:02,800 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-25 08:52:02,800 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:52:02,800 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-25 08:52:02,800 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-25 08:52:02,800 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration2_Loop [2019-11-25 08:52:02,800 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-25 08:52:02,800 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-25 08:52:02,801 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:52:02,804 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:52:02,807 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:52:02,809 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:52:02,811 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:52:02,818 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:52:02,859 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-25 08:52:02,860 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a6b645b8-0144-4e06-8cd2-74b3624256ca/bin/uautomizer/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-25 08:52:02,879 INFO L120 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 [2019-11-25 08:52:02,880 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-25 08:52:02,881 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-25 08:52:02,881 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-25 08:52:02,881 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-25 08:52:02,881 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-25 08:52:02,882 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-25 08:52:02,882 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:52:02,884 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a6b645b8-0144-4e06-8cd2-74b3624256ca/bin/uautomizer/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-25 08:52:02,920 INFO L120 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 [2019-11-25 08:52:02,922 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-25 08:52:02,922 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-25 08:52:02,922 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-25 08:52:02,922 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-25 08:52:02,922 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-25 08:52:02,923 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-25 08:52:02,923 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:52:02,930 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a6b645b8-0144-4e06-8cd2-74b3624256ca/bin/uautomizer/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-25 08:52:02,945 INFO L120 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 [2019-11-25 08:52:02,950 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-25 08:52:02,950 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-25 08:52:02,951 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-25 08:52:02,951 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-25 08:52:02,951 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-25 08:52:02,952 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-25 08:52:02,952 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:52:02,954 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a6b645b8-0144-4e06-8cd2-74b3624256ca/bin/uautomizer/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-25 08:52:02,965 INFO L120 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 [2019-11-25 08:52:02,967 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-25 08:52:02,967 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-25 08:52:02,967 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-25 08:52:02,967 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-25 08:52:02,967 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-25 08:52:02,968 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-25 08:52:02,968 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:52:02,970 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a6b645b8-0144-4e06-8cd2-74b3624256ca/bin/uautomizer/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-25 08:52:02,976 INFO L120 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 [2019-11-25 08:52:02,977 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-25 08:52:02,977 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-25 08:52:02,978 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-25 08:52:02,978 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-25 08:52:02,978 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-25 08:52:02,979 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-25 08:52:02,979 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:52:02,983 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-25 08:52:02,987 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2019-11-25 08:52:02,987 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a6b645b8-0144-4e06-8cd2-74b3624256ca/bin/uautomizer/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-25 08:52:02,991 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-25 08:52:02,991 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-25 08:52:02,991 INFO L510 LassoAnalysis]: Proved termination. [2019-11-25 08:52:02,992 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] [2019-11-25 08:52:03,002 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:52:03,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:52:03,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:03,043 INFO L255 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-25 08:52:03,045 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:52:03,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:03,055 INFO L255 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-25 08:52:03,056 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:52:03,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:52:03,080 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 [2019-11-25 08:52:03,080 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 55 states and 83 transitions. cyclomatic complexity: 32 Second operand 4 states. [2019-11-25 08:52:03,143 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 55 states and 83 transitions. cyclomatic complexity: 32. Second operand 4 states. Result 105 states and 149 transitions. Complement of second has 13 states. [2019-11-25 08:52:03,146 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 [2019-11-25 08:52:03,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2019-11-25 08:52:03,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 17 transitions. [2019-11-25 08:52:03,147 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 17 transitions. Stem has 8 letters. Loop has 3 letters. [2019-11-25 08:52:03,147 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-25 08:52:03,147 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 17 transitions. Stem has 11 letters. Loop has 3 letters. [2019-11-25 08:52:03,147 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-25 08:52:03,147 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 17 transitions. Stem has 8 letters. Loop has 6 letters. [2019-11-25 08:52:03,148 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-25 08:52:03,148 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 105 states and 149 transitions. [2019-11-25 08:52:03,151 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2019-11-25 08:52:03,158 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 105 states to 93 states and 137 transitions. [2019-11-25 08:52:03,158 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 37 [2019-11-25 08:52:03,158 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 39 [2019-11-25 08:52:03,159 INFO L73 IsDeterministic]: Start isDeterministic. Operand 93 states and 137 transitions. [2019-11-25 08:52:03,160 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-25 08:52:03,161 INFO L688 BuchiCegarLoop]: Abstraction has 93 states and 137 transitions. [2019-11-25 08:52:03,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states and 137 transitions. [2019-11-25 08:52:03,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 89. [2019-11-25 08:52:03,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-11-25 08:52:03,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 129 transitions. [2019-11-25 08:52:03,175 INFO L711 BuchiCegarLoop]: Abstraction has 89 states and 129 transitions. [2019-11-25 08:52:03,175 INFO L591 BuchiCegarLoop]: Abstraction has 89 states and 129 transitions. [2019-11-25 08:52:03,175 INFO L424 BuchiCegarLoop]: ======== Iteration 3============ [2019-11-25 08:52:03,175 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 89 states and 129 transitions. [2019-11-25 08:52:03,176 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2019-11-25 08:52:03,177 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-25 08:52:03,177 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-25 08:52:03,177 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:52:03,178 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-11-25 08:52:03,178 INFO L794 eck$LassoCheckResult]: Stem: 613#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 614#L25 call main_#t~ret6 := rec2(main_~x~0);< 620#rec2ENTRY ~j := #in~j; 633#L18 assume !(~j <= 0); 615#L20 call #t~ret3 := rec1(~j - 1);< 642#rec1ENTRY ~i := #in~i; 637#L12 assume !(~i <= 0); 577#L14 call #t~ret0 := rec1(~i - 2);< 576#rec1ENTRY ~i := #in~i; 579#L12 assume ~i <= 0;#res := 0; 583#rec1FINAL assume true; 584#rec1EXIT >#27#return; 593#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 595#rec1ENTRY [2019-11-25 08:52:03,178 INFO L796 eck$LassoCheckResult]: Loop: 595#rec1ENTRY ~i := #in~i; 632#L12 assume !(~i <= 0); 589#L14 call #t~ret0 := rec1(~i - 2);< 595#rec1ENTRY [2019-11-25 08:52:03,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:52:03,178 INFO L82 PathProgramCache]: Analyzing trace with hash 1317996508, now seen corresponding path program 1 times [2019-11-25 08:52:03,179 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:52:03,179 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541713298] [2019-11-25 08:52:03,179 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:52:03,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:52:03,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:52:03,191 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-25 08:52:03,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:52:03,192 INFO L82 PathProgramCache]: Analyzing trace with hash 29941, now seen corresponding path program 2 times [2019-11-25 08:52:03,192 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:52:03,192 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036810558] [2019-11-25 08:52:03,192 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:52:03,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:52:03,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:52:03,197 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-25 08:52:03,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:52:03,197 INFO L82 PathProgramCache]: Analyzing trace with hash -157050054, now seen corresponding path program 2 times [2019-11-25 08:52:03,197 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:52:03,198 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526349194] [2019-11-25 08:52:03,198 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:52:03,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:03,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:03,279 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-25 08:52:03,280 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526349194] [2019-11-25 08:52:03,280 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:52:03,280 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-25 08:52:03,281 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254263391] [2019-11-25 08:52:03,317 INFO L210 LassoAnalysis]: Preferences: [2019-11-25 08:52:03,318 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-25 08:52:03,318 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-25 08:52:03,318 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-25 08:52:03,318 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-25 08:52:03,318 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:52:03,318 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-25 08:52:03,318 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-25 08:52:03,318 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration3_Loop [2019-11-25 08:52:03,319 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-25 08:52:03,319 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-25 08:52:03,320 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:52:03,323 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:52:03,333 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:52:03,335 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:52:03,338 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:52:03,341 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:52:03,376 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-25 08:52:03,376 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a6b645b8-0144-4e06-8cd2-74b3624256ca/bin/uautomizer/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-25 08:52:03,384 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-25 08:52:03,384 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:52:03,389 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-25 08:52:03,389 INFO L440 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/run_dir_a6b645b8-0144-4e06-8cd2-74b3624256ca/bin/uautomizer/z3 Starting monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-25 08:52:03,394 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-25 08:52:03,395 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a6b645b8-0144-4e06-8cd2-74b3624256ca/bin/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 [2019-11-25 08:52:03,402 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-25 08:52:03,402 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-25 08:52:03,444 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-25 08:52:03,445 INFO L210 LassoAnalysis]: Preferences: [2019-11-25 08:52:03,445 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-25 08:52:03,445 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-25 08:52:03,445 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-25 08:52:03,445 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-25 08:52:03,445 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:52:03,445 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-25 08:52:03,445 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-25 08:52:03,445 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration3_Loop [2019-11-25 08:52:03,445 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-25 08:52:03,446 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-25 08:52:03,446 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:52:03,448 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:52:03,464 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:52:03,466 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:52:03,468 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:52:03,470 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:52:03,509 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-25 08:52:03,509 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a6b645b8-0144-4e06-8cd2-74b3624256ca/bin/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 [2019-11-25 08:52:03,517 INFO L120 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 [2019-11-25 08:52:03,519 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-25 08:52:03,519 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-25 08:52:03,519 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-25 08:52:03,519 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-25 08:52:03,519 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-25 08:52:03,520 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-25 08:52:03,520 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-25 08:52:03,521 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a6b645b8-0144-4e06-8cd2-74b3624256ca/bin/uautomizer/z3 Starting monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-25 08:52:03,530 INFO L120 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 Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:52:03,531 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-25 08:52:03,531 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-25 08:52:03,531 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-25 08:52:03,531 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-25 08:52:03,532 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-25 08:52:03,532 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-25 08:52:03,533 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-25 08:52:03,535 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-25 08:52:03,540 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2019-11-25 08:52:03,540 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a6b645b8-0144-4e06-8cd2-74b3624256ca/bin/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 [2019-11-25 08:52:03,543 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-25 08:52:03,544 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-25 08:52:03,544 INFO L510 LassoAnalysis]: Proved termination. [2019-11-25 08:52:03,544 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] [2019-11-25 08:52:03,545 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-25 08:52:03,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:52:03,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:03,580 INFO L255 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-25 08:52:03,581 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:52:03,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:03,612 INFO L255 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-25 08:52:03,613 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:52:03,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:52:03,636 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 [2019-11-25 08:52:03,636 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 89 states and 129 transitions. cyclomatic complexity: 47 Second operand 5 states. [2019-11-25 08:52:03,740 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 89 states and 129 transitions. cyclomatic complexity: 47. Second operand 5 states. Result 134 states and 193 transitions. Complement of second has 14 states. [2019-11-25 08:52:03,744 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 [2019-11-25 08:52:03,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-11-25 08:52:03,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 19 transitions. [2019-11-25 08:52:03,745 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 19 transitions. Stem has 13 letters. Loop has 3 letters. [2019-11-25 08:52:03,745 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-25 08:52:03,745 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 19 transitions. Stem has 16 letters. Loop has 3 letters. [2019-11-25 08:52:03,745 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-25 08:52:03,745 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 19 transitions. Stem has 13 letters. Loop has 6 letters. [2019-11-25 08:52:03,746 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-25 08:52:03,746 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 134 states and 193 transitions. [2019-11-25 08:52:03,749 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2019-11-25 08:52:03,754 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 134 states to 122 states and 181 transitions. [2019-11-25 08:52:03,754 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 48 [2019-11-25 08:52:03,754 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 50 [2019-11-25 08:52:03,755 INFO L73 IsDeterministic]: Start isDeterministic. Operand 122 states and 181 transitions. [2019-11-25 08:52:03,755 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-25 08:52:03,755 INFO L688 BuchiCegarLoop]: Abstraction has 122 states and 181 transitions. [2019-11-25 08:52:03,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states and 181 transitions. [2019-11-25 08:52:03,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 113. [2019-11-25 08:52:03,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2019-11-25 08:52:03,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 165 transitions. [2019-11-25 08:52:03,767 INFO L711 BuchiCegarLoop]: Abstraction has 113 states and 165 transitions. [2019-11-25 08:52:03,767 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:52:03,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-25 08:52:03,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-25 08:52:03,770 INFO L87 Difference]: Start difference. First operand 113 states and 165 transitions. Second operand 6 states. [2019-11-25 08:52:03,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:52:03,826 INFO L93 Difference]: Finished difference Result 123 states and 175 transitions. [2019-11-25 08:52:03,828 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-25 08:52:03,828 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 123 states and 175 transitions. [2019-11-25 08:52:03,831 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 11 [2019-11-25 08:52:03,835 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 123 states to 121 states and 173 transitions. [2019-11-25 08:52:03,835 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 55 [2019-11-25 08:52:03,835 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 55 [2019-11-25 08:52:03,835 INFO L73 IsDeterministic]: Start isDeterministic. Operand 121 states and 173 transitions. [2019-11-25 08:52:03,836 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-25 08:52:03,836 INFO L688 BuchiCegarLoop]: Abstraction has 121 states and 173 transitions. [2019-11-25 08:52:03,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states and 173 transitions. [2019-11-25 08:52:03,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 101. [2019-11-25 08:52:03,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-11-25 08:52:03,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 143 transitions. [2019-11-25 08:52:03,847 INFO L711 BuchiCegarLoop]: Abstraction has 101 states and 143 transitions. [2019-11-25 08:52:03,847 INFO L591 BuchiCegarLoop]: Abstraction has 101 states and 143 transitions. [2019-11-25 08:52:03,847 INFO L424 BuchiCegarLoop]: ======== Iteration 4============ [2019-11-25 08:52:03,847 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 101 states and 143 transitions. [2019-11-25 08:52:03,848 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2019-11-25 08:52:03,849 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-25 08:52:03,849 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-25 08:52:03,850 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:52:03,850 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2019-11-25 08:52:03,850 INFO L794 eck$LassoCheckResult]: Stem: 1167#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 1168#L25 call main_#t~ret6 := rec2(main_~x~0);< 1174#rec2ENTRY ~j := #in~j; 1185#L18 assume !(~j <= 0); 1146#L20 call #t~ret3 := rec1(~j - 1);< 1184#rec1ENTRY ~i := #in~i; 1183#L12 assume !(~i <= 0); 1156#L14 call #t~ret0 := rec1(~i - 2);< 1181#rec1ENTRY ~i := #in~i; 1179#L12 assume !(~i <= 0); 1161#L14 call #t~ret0 := rec1(~i - 2);< 1178#rec1ENTRY ~i := #in~i; 1180#L12 assume ~i <= 0;#res := 0; 1222#rec1FINAL assume true; 1166#rec1EXIT >#27#return; 1133#L14-1 [2019-11-25 08:52:03,851 INFO L796 eck$LassoCheckResult]: Loop: 1133#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 1132#rec1ENTRY ~i := #in~i; 1135#L12 assume ~i <= 0;#res := 0; 1140#rec1FINAL assume true; 1141#rec1EXIT >#29#return; 1154#L14-2 call #t~ret2 := rec1(#t~ret1);< 1163#rec1ENTRY ~i := #in~i; 1204#L12 assume !(~i <= 0); 1157#L14 call #t~ret0 := rec1(~i - 2);< 1163#rec1ENTRY ~i := #in~i; 1204#L12 assume ~i <= 0;#res := 0; 1205#rec1FINAL assume true; 1213#rec1EXIT >#27#return; 1133#L14-1 [2019-11-25 08:52:03,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:52:03,851 INFO L82 PathProgramCache]: Analyzing trace with hash -377207200, now seen corresponding path program 1 times [2019-11-25 08:52:03,851 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:52:03,851 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496543738] [2019-11-25 08:52:03,852 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:52:03,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:52:03,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:52:03,864 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-25 08:52:03,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:52:03,865 INFO L82 PathProgramCache]: Analyzing trace with hash 1306212703, now seen corresponding path program 1 times [2019-11-25 08:52:03,865 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:52:03,865 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199504563] [2019-11-25 08:52:03,865 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:52:03,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:03,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:03,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:03,904 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-25 08:52:03,904 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199504563] [2019-11-25 08:52:03,904 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351474634] [2019-11-25 08:52:03,904 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a6b645b8-0144-4e06-8cd2-74b3624256ca/bin/uautomizer/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:52:03,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:03,928 INFO L255 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-25 08:52:03,929 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:52:03,932 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:52:03,932 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-25 08:52:03,932 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 6 [2019-11-25 08:52:03,932 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776500627] [2019-11-25 08:52:03,933 INFO L811 eck$LassoCheckResult]: loop already infeasible [2019-11-25 08:52:03,933 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:52:03,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-25 08:52:03,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-25 08:52:03,933 INFO L87 Difference]: Start difference. First operand 101 states and 143 transitions. cyclomatic complexity: 49 Second operand 6 states. [2019-11-25 08:52:03,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:52:03,977 INFO L93 Difference]: Finished difference Result 117 states and 161 transitions. [2019-11-25 08:52:03,977 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-25 08:52:03,978 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 117 states and 161 transitions. [2019-11-25 08:52:03,980 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2019-11-25 08:52:03,983 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 117 states to 117 states and 161 transitions. [2019-11-25 08:52:03,983 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 53 [2019-11-25 08:52:03,983 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 53 [2019-11-25 08:52:03,983 INFO L73 IsDeterministic]: Start isDeterministic. Operand 117 states and 161 transitions. [2019-11-25 08:52:03,984 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-25 08:52:03,984 INFO L688 BuchiCegarLoop]: Abstraction has 117 states and 161 transitions. [2019-11-25 08:52:03,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states and 161 transitions. [2019-11-25 08:52:03,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 113. [2019-11-25 08:52:03,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2019-11-25 08:52:03,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 157 transitions. [2019-11-25 08:52:03,993 INFO L711 BuchiCegarLoop]: Abstraction has 113 states and 157 transitions. [2019-11-25 08:52:03,994 INFO L591 BuchiCegarLoop]: Abstraction has 113 states and 157 transitions. [2019-11-25 08:52:03,994 INFO L424 BuchiCegarLoop]: ======== Iteration 5============ [2019-11-25 08:52:03,994 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 113 states and 157 transitions. [2019-11-25 08:52:03,995 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2019-11-25 08:52:03,995 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-25 08:52:03,995 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-25 08:52:03,997 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:52:03,997 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:52:03,997 INFO L794 eck$LassoCheckResult]: Stem: 1445#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 1446#L25 call main_#t~ret6 := rec2(main_~x~0);< 1458#rec2ENTRY ~j := #in~j; 1471#L18 assume !(~j <= 0); 1422#L20 call #t~ret3 := rec1(~j - 1);< 1470#rec1ENTRY ~i := #in~i; 1469#L12 assume !(~i <= 0); 1418#L14 call #t~ret0 := rec1(~i - 2);< 1467#rec1ENTRY ~i := #in~i; 1440#L12 assume ~i <= 0;#res := 0; 1417#rec1FINAL assume true; 1419#rec1EXIT >#27#return; 1410#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 1409#rec1ENTRY ~i := #in~i; 1412#L12 assume ~i <= 0;#res := 0; 1515#rec1FINAL assume true; 1509#rec1EXIT >#29#return; 1441#L14-2 call #t~ret2 := rec1(#t~ret1);< 1442#rec1ENTRY ~i := #in~i; 1510#L12 assume ~i <= 0;#res := 0; 1508#rec1FINAL assume true; 1505#rec1EXIT >#31#return; 1434#L14-3 #res := 1 + #t~ret2;havoc #t~ret1;havoc #t~ret2;havoc #t~ret0; 1435#rec1FINAL assume true; 1464#rec1EXIT >#33#return; 1404#L20-1 [2019-11-25 08:52:03,997 INFO L796 eck$LassoCheckResult]: Loop: 1404#L20-1 call #t~ret4 := rec2(#t~ret3);< 1403#rec2ENTRY ~j := #in~j; 1405#L18 assume !(~j <= 0); 1452#L20 call #t~ret3 := rec1(~j - 1);< 1454#rec1ENTRY ~i := #in~i; 1512#L12 assume !(~i <= 0); 1447#L14 call #t~ret0 := rec1(~i - 2);< 1454#rec1ENTRY ~i := #in~i; 1512#L12 assume ~i <= 0;#res := 0; 1511#rec1FINAL assume true; 1507#rec1EXIT >#27#return; 1411#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 1409#rec1ENTRY ~i := #in~i; 1412#L12 assume ~i <= 0;#res := 0; 1515#rec1FINAL assume true; 1509#rec1EXIT >#29#return; 1506#L14-2 call #t~ret2 := rec1(#t~ret1);< 1442#rec1ENTRY ~i := #in~i; 1510#L12 assume ~i <= 0;#res := 0; 1508#rec1FINAL assume true; 1505#rec1EXIT >#31#return; 1463#L14-3 #res := 1 + #t~ret2;havoc #t~ret1;havoc #t~ret2;havoc #t~ret0; 1475#rec1FINAL assume true; 1461#rec1EXIT >#33#return; 1404#L20-1 [2019-11-25 08:52:03,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:52:03,998 INFO L82 PathProgramCache]: Analyzing trace with hash -790062692, now seen corresponding path program 1 times [2019-11-25 08:52:03,998 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:52:03,998 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7060853] [2019-11-25 08:52:03,998 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:52:04,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:52:04,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:52:04,023 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-25 08:52:04,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:52:04,024 INFO L82 PathProgramCache]: Analyzing trace with hash 125202860, now seen corresponding path program 1 times [2019-11-25 08:52:04,024 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:52:04,024 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674124363] [2019-11-25 08:52:04,024 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:52:04,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:52:04,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:52:04,047 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-25 08:52:04,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:52:04,048 INFO L82 PathProgramCache]: Analyzing trace with hash -2019382713, now seen corresponding path program 1 times [2019-11-25 08:52:04,048 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:52:04,048 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533726377] [2019-11-25 08:52:04,048 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:52:04,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:04,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:04,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:04,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:04,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:04,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:04,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:04,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:04,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:04,226 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 28 proven. 22 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2019-11-25 08:52:04,226 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533726377] [2019-11-25 08:52:04,226 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597677864] [2019-11-25 08:52:04,226 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a6b645b8-0144-4e06-8cd2-74b3624256ca/bin/uautomizer/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:52:04,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:04,263 INFO L255 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-25 08:52:04,266 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:52:04,290 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 28 proven. 22 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2019-11-25 08:52:04,291 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:52:04,291 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2019-11-25 08:52:04,291 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471491513] [2019-11-25 08:52:04,536 INFO L210 LassoAnalysis]: Preferences: [2019-11-25 08:52:04,536 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-25 08:52:04,536 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-25 08:52:04,536 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-25 08:52:04,537 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-25 08:52:04,537 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:52:04,537 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-25 08:52:04,537 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-25 08:52:04,537 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration5_Loop [2019-11-25 08:52:04,537 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-25 08:52:04,537 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-25 08:52:04,538 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:52:04,549 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:52:04,551 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:52:04,594 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-25 08:52:04,594 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a6b645b8-0144-4e06-8cd2-74b3624256ca/bin/uautomizer/z3 Starting monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-25 08:52:04,606 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-25 08:52:04,606 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a6b645b8-0144-4e06-8cd2-74b3624256ca/bin/uautomizer/z3 Starting monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-25 08:52:04,617 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-25 08:52:04,617 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:52:07,766 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-25 08:52:07,768 INFO L210 LassoAnalysis]: Preferences: [2019-11-25 08:52:07,768 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-25 08:52:07,768 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-25 08:52:07,768 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-25 08:52:07,768 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-25 08:52:07,769 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:52:07,769 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-25 08:52:07,769 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-25 08:52:07,769 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration5_Loop [2019-11-25 08:52:07,769 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-25 08:52:07,769 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-25 08:52:07,770 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:52:07,772 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:52:07,773 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:52:07,830 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-25 08:52:07,830 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a6b645b8-0144-4e06-8cd2-74b3624256ca/bin/uautomizer/z3 Starting monitored process 36 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 36 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:52:07,841 INFO L120 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 [2019-11-25 08:52:07,842 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-25 08:52:07,842 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-25 08:52:07,842 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-25 08:52:07,842 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-25 08:52:07,842 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-25 08:52:07,843 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-25 08:52:07,843 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-25 08:52:07,844 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a6b645b8-0144-4e06-8cd2-74b3624256ca/bin/uautomizer/z3 Starting monitored process 37 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 37 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:52:07,848 INFO L120 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 [2019-11-25 08:52:07,849 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-25 08:52:07,849 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-25 08:52:07,849 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-25 08:52:07,849 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-25 08:52:07,849 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-25 08:52:07,850 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-25 08:52:07,850 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-25 08:52:07,853 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a6b645b8-0144-4e06-8cd2-74b3624256ca/bin/uautomizer/z3 Starting monitored process 38 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 38 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:52:07,857 INFO L120 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 [2019-11-25 08:52:07,859 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-25 08:52:07,859 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-25 08:52:07,860 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-25 08:52:07,860 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-25 08:52:07,860 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-25 08:52:07,863 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-25 08:52:07,863 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-25 08:52:07,869 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-25 08:52:07,878 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-25 08:52:07,878 INFO L444 ModelExtractionUtils]: 2 out of 5 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a6b645b8-0144-4e06-8cd2-74b3624256ca/bin/uautomizer/z3 Starting monitored process 39 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-25 08:52:07,885 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-25 08:52:07,885 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-25 08:52:07,885 INFO L510 LassoAnalysis]: Proved termination. [2019-11-25 08:52:07,885 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec2_#t~ret3) = 1*rec2_#t~ret3 Supporting invariants [] [2019-11-25 08:52:07,887 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed Waiting until toolchain timeout for monitored process 39 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:52:07,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:52:07,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:07,937 INFO L255 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-25 08:52:07,939 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:52:07,970 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:52:07,974 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:52:07,977 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:52:08,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:08,010 INFO L255 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-25 08:52:08,012 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:52:08,142 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-11-25 08:52:08,142 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 9 loop predicates [2019-11-25 08:52:08,142 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 113 states and 157 transitions. cyclomatic complexity: 51 Second operand 11 states. [2019-11-25 08:52:08,583 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 113 states and 157 transitions. cyclomatic complexity: 51. Second operand 11 states. Result 584 states and 903 transitions. Complement of second has 45 states. [2019-11-25 08:52:08,584 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 11 states 2 stem states 8 non-accepting loop states 1 accepting loop states [2019-11-25 08:52:08,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-11-25 08:52:08,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 52 transitions. [2019-11-25 08:52:08,585 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 52 transitions. Stem has 25 letters. Loop has 24 letters. [2019-11-25 08:52:08,586 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-25 08:52:08,586 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 52 transitions. Stem has 49 letters. Loop has 24 letters. [2019-11-25 08:52:08,587 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-25 08:52:08,587 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 52 transitions. Stem has 25 letters. Loop has 48 letters. [2019-11-25 08:52:08,588 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-25 08:52:08,588 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 584 states and 903 transitions. [2019-11-25 08:52:08,599 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 14 [2019-11-25 08:52:08,609 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 584 states to 432 states and 649 transitions. [2019-11-25 08:52:08,609 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 140 [2019-11-25 08:52:08,610 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 141 [2019-11-25 08:52:08,610 INFO L73 IsDeterministic]: Start isDeterministic. Operand 432 states and 649 transitions. [2019-11-25 08:52:08,610 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-25 08:52:08,610 INFO L688 BuchiCegarLoop]: Abstraction has 432 states and 649 transitions. [2019-11-25 08:52:08,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states and 649 transitions. [2019-11-25 08:52:08,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 383. [2019-11-25 08:52:08,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 383 states. [2019-11-25 08:52:08,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 534 transitions. [2019-11-25 08:52:08,636 INFO L711 BuchiCegarLoop]: Abstraction has 383 states and 534 transitions. [2019-11-25 08:52:08,637 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:52:08,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-25 08:52:08,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2019-11-25 08:52:08,637 INFO L87 Difference]: Start difference. First operand 383 states and 534 transitions. Second operand 12 states. [2019-11-25 08:52:08,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:52:08,838 INFO L93 Difference]: Finished difference Result 442 states and 645 transitions. [2019-11-25 08:52:08,839 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-25 08:52:08,840 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 442 states and 645 transitions. [2019-11-25 08:52:08,847 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 14 [2019-11-25 08:52:08,854 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 442 states to 349 states and 495 transitions. [2019-11-25 08:52:08,854 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 131 [2019-11-25 08:52:08,855 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 135 [2019-11-25 08:52:08,855 INFO L73 IsDeterministic]: Start isDeterministic. Operand 349 states and 495 transitions. [2019-11-25 08:52:08,862 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-25 08:52:08,862 INFO L688 BuchiCegarLoop]: Abstraction has 349 states and 495 transitions. [2019-11-25 08:52:08,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states and 495 transitions. [2019-11-25 08:52:08,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 314. [2019-11-25 08:52:08,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 314 states. [2019-11-25 08:52:08,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 415 transitions. [2019-11-25 08:52:08,889 INFO L711 BuchiCegarLoop]: Abstraction has 314 states and 415 transitions. [2019-11-25 08:52:08,889 INFO L591 BuchiCegarLoop]: Abstraction has 314 states and 415 transitions. [2019-11-25 08:52:08,889 INFO L424 BuchiCegarLoop]: ======== Iteration 6============ [2019-11-25 08:52:08,889 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 314 states and 415 transitions. [2019-11-25 08:52:08,892 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 14 [2019-11-25 08:52:08,892 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-25 08:52:08,892 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-25 08:52:08,894 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [5, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:52:08,894 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-11-25 08:52:08,895 INFO L794 eck$LassoCheckResult]: Stem: 3437#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 3438#L25 call main_#t~ret6 := rec2(main_~x~0);< 3454#rec2ENTRY ~j := #in~j; 3476#L18 assume !(~j <= 0); 3456#L20 call #t~ret3 := rec1(~j - 1);< 3474#rec1ENTRY ~i := #in~i; 3490#L12 assume !(~i <= 0); 3483#L14 call #t~ret0 := rec1(~i - 2);< 3489#rec1ENTRY ~i := #in~i; 3494#L12 assume ~i <= 0;#res := 0; 3548#rec1FINAL assume true; 3545#rec1EXIT >#27#return; 3540#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 3541#rec1ENTRY ~i := #in~i; 3544#L12 assume ~i <= 0;#res := 0; 3543#rec1FINAL assume true; 3539#rec1EXIT >#29#return; 3535#L14-2 call #t~ret2 := rec1(#t~ret1);< 3537#rec1ENTRY ~i := #in~i; 3542#L12 assume ~i <= 0;#res := 0; 3538#rec1FINAL assume true; 3536#rec1EXIT >#31#return; 3532#L14-3 #res := 1 + #t~ret2;havoc #t~ret1;havoc #t~ret2;havoc #t~ret0; 3568#rec1FINAL assume true; 3455#rec1EXIT >#33#return; 3386#L20-1 call #t~ret4 := rec2(#t~ret3);< 3385#rec2ENTRY ~j := #in~j; 3387#L18 assume !(~j <= 0); 3521#L20 call #t~ret3 := rec1(~j - 1);< 3461#rec1ENTRY ~i := #in~i; 3567#L12 assume !(~i <= 0); 3423#L14 call #t~ret0 := rec1(~i - 2);< 3440#rec1ENTRY [2019-11-25 08:52:08,895 INFO L796 eck$LassoCheckResult]: Loop: 3440#rec1ENTRY ~i := #in~i; 3553#L12 assume !(~i <= 0); 3420#L14 call #t~ret0 := rec1(~i - 2);< 3440#rec1ENTRY [2019-11-25 08:52:08,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:52:08,896 INFO L82 PathProgramCache]: Analyzing trace with hash -744961728, now seen corresponding path program 2 times [2019-11-25 08:52:08,896 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:52:08,896 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881400856] [2019-11-25 08:52:08,896 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:52:08,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:08,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:08,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:08,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:08,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:08,984 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-25 08:52:08,985 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881400856] [2019-11-25 08:52:08,985 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392315507] [2019-11-25 08:52:08,985 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a6b645b8-0144-4e06-8cd2-74b3624256ca/bin/uautomizer/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:52:09,028 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-25 08:52:09,028 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:52:09,029 INFO L255 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-25 08:52:09,030 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:52:09,036 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-25 08:52:09,036 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:52:09,037 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2019-11-25 08:52:09,037 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923538821] [2019-11-25 08:52:09,037 INFO L799 eck$LassoCheckResult]: stem already infeasible [2019-11-25 08:52:09,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:52:09,038 INFO L82 PathProgramCache]: Analyzing trace with hash 29941, now seen corresponding path program 3 times [2019-11-25 08:52:09,038 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:52:09,038 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760127636] [2019-11-25 08:52:09,038 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:52:09,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:52:09,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:52:09,041 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-25 08:52:09,076 INFO L210 LassoAnalysis]: Preferences: [2019-11-25 08:52:09,077 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-25 08:52:09,077 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-25 08:52:09,077 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-25 08:52:09,077 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-25 08:52:09,077 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:52:09,077 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-25 08:52:09,077 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-25 08:52:09,077 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration6_Loop [2019-11-25 08:52:09,077 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-25 08:52:09,077 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-25 08:52:09,078 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:52:09,080 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:52:09,086 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:52:09,088 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:52:09,090 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:52:09,092 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:52:09,118 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-25 08:52:09,119 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a6b645b8-0144-4e06-8cd2-74b3624256ca/bin/uautomizer/z3 Starting monitored process 41 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 41 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:52:09,128 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-25 08:52:09,128 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-25 08:52:09,131 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-25 08:52:09,131 INFO L440 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/run_dir_a6b645b8-0144-4e06-8cd2-74b3624256ca/bin/uautomizer/z3 Starting monitored process 42 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-25 08:52:09,141 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-25 08:52:09,141 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 42 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a6b645b8-0144-4e06-8cd2-74b3624256ca/bin/uautomizer/z3 Starting monitored process 43 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-25 08:52:09,152 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-25 08:52:09,152 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 43 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:52:09,195 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-25 08:52:09,196 INFO L210 LassoAnalysis]: Preferences: [2019-11-25 08:52:09,196 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-25 08:52:09,196 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-25 08:52:09,196 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-25 08:52:09,197 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-25 08:52:09,197 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:52:09,197 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-25 08:52:09,197 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-25 08:52:09,197 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration6_Loop [2019-11-25 08:52:09,197 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-25 08:52:09,197 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-25 08:52:09,198 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:52:09,205 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:52:09,210 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:52:09,214 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:52:09,216 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:52:09,218 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:52:09,250 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-25 08:52:09,251 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a6b645b8-0144-4e06-8cd2-74b3624256ca/bin/uautomizer/z3 Starting monitored process 44 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-25 08:52:09,256 INFO L120 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 [2019-11-25 08:52:09,258 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-25 08:52:09,258 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-25 08:52:09,258 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-25 08:52:09,258 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-25 08:52:09,258 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-25 08:52:09,259 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-25 08:52:09,259 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 44 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:52:09,265 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a6b645b8-0144-4e06-8cd2-74b3624256ca/bin/uautomizer/z3 Starting monitored process 45 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 45 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:52:09,270 INFO L120 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 [2019-11-25 08:52:09,271 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-25 08:52:09,271 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-25 08:52:09,271 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-25 08:52:09,271 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-25 08:52:09,272 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-25 08:52:09,272 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-25 08:52:09,272 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-25 08:52:09,274 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-25 08:52:09,275 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2019-11-25 08:52:09,275 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a6b645b8-0144-4e06-8cd2-74b3624256ca/bin/uautomizer/z3 Starting monitored process 46 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 46 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:52:09,278 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-25 08:52:09,278 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-25 08:52:09,279 INFO L510 LassoAnalysis]: Proved termination. [2019-11-25 08:52:09,279 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] [2019-11-25 08:52:09,280 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-25 08:52:09,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:52:09,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:09,338 INFO L255 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-25 08:52:09,340 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:52:09,362 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:52:09,364 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:52:09,367 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:52:09,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:09,377 INFO L255 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-25 08:52:09,378 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:52:09,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:52:09,393 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 [2019-11-25 08:52:09,393 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 314 states and 415 transitions. cyclomatic complexity: 114 Second operand 5 states. [2019-11-25 08:52:09,468 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 314 states and 415 transitions. cyclomatic complexity: 114. Second operand 5 states. Result 348 states and 455 transitions. Complement of second has 14 states. [2019-11-25 08:52:09,473 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 [2019-11-25 08:52:09,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-11-25 08:52:09,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 17 transitions. [2019-11-25 08:52:09,474 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 17 transitions. Stem has 32 letters. Loop has 3 letters. [2019-11-25 08:52:09,474 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-25 08:52:09,474 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-25 08:52:09,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:52:09,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:09,520 INFO L255 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-25 08:52:09,522 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:52:09,552 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:52:09,554 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:52:09,557 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:52:09,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:09,569 INFO L255 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-25 08:52:09,570 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:52:09,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:52:09,593 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 [2019-11-25 08:52:09,593 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 314 states and 415 transitions. cyclomatic complexity: 114 Second operand 5 states. [2019-11-25 08:52:09,667 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 314 states and 415 transitions. cyclomatic complexity: 114. Second operand 5 states. Result 348 states and 455 transitions. Complement of second has 14 states. [2019-11-25 08:52:09,668 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 [2019-11-25 08:52:09,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-11-25 08:52:09,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 17 transitions. [2019-11-25 08:52:09,669 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 17 transitions. Stem has 32 letters. Loop has 3 letters. [2019-11-25 08:52:09,669 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-25 08:52:09,669 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-25 08:52:09,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:52:09,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:09,745 INFO L255 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-25 08:52:09,747 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:52:09,766 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:52:09,768 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:52:09,770 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:52:09,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:09,779 INFO L255 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-25 08:52:09,779 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:52:09,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:52:09,805 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 [2019-11-25 08:52:09,806 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 314 states and 415 transitions. cyclomatic complexity: 114 Second operand 5 states. [2019-11-25 08:52:09,916 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 314 states and 415 transitions. cyclomatic complexity: 114. Second operand 5 states. Result 485 states and 616 transitions. Complement of second has 16 states. [2019-11-25 08:52:09,920 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 [2019-11-25 08:52:09,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-11-25 08:52:09,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 24 transitions. [2019-11-25 08:52:09,920 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 24 transitions. Stem has 32 letters. Loop has 3 letters. [2019-11-25 08:52:09,921 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-25 08:52:09,921 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 24 transitions. Stem has 35 letters. Loop has 3 letters. [2019-11-25 08:52:09,921 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-25 08:52:09,921 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 24 transitions. Stem has 32 letters. Loop has 6 letters. [2019-11-25 08:52:09,922 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-25 08:52:09,922 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 485 states and 616 transitions. [2019-11-25 08:52:09,928 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 26 [2019-11-25 08:52:09,935 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 485 states to 395 states and 526 transitions. [2019-11-25 08:52:09,935 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 129 [2019-11-25 08:52:09,936 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 136 [2019-11-25 08:52:09,936 INFO L73 IsDeterministic]: Start isDeterministic. Operand 395 states and 526 transitions. [2019-11-25 08:52:09,936 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-25 08:52:09,937 INFO L688 BuchiCegarLoop]: Abstraction has 395 states and 526 transitions. [2019-11-25 08:52:09,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states and 526 transitions. [2019-11-25 08:52:09,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 351. [2019-11-25 08:52:09,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 351 states. [2019-11-25 08:52:09,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 456 transitions. [2019-11-25 08:52:09,952 INFO L711 BuchiCegarLoop]: Abstraction has 351 states and 456 transitions. [2019-11-25 08:52:09,953 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:52:09,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-25 08:52:09,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2019-11-25 08:52:09,954 INFO L87 Difference]: Start difference. First operand 351 states and 456 transitions. Second operand 10 states. [2019-11-25 08:52:10,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:52:10,053 INFO L93 Difference]: Finished difference Result 378 states and 513 transitions. [2019-11-25 08:52:10,053 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-25 08:52:10,054 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 378 states and 513 transitions. [2019-11-25 08:52:10,059 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 22 [2019-11-25 08:52:10,060 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 378 states to 104 states and 142 transitions. [2019-11-25 08:52:10,060 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 98 [2019-11-25 08:52:10,061 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 98 [2019-11-25 08:52:10,061 INFO L73 IsDeterministic]: Start isDeterministic. Operand 104 states and 142 transitions. [2019-11-25 08:52:10,061 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-25 08:52:10,061 INFO L688 BuchiCegarLoop]: Abstraction has 104 states and 142 transitions. [2019-11-25 08:52:10,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states and 142 transitions. [2019-11-25 08:52:10,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 86. [2019-11-25 08:52:10,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-11-25 08:52:10,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 106 transitions. [2019-11-25 08:52:10,065 INFO L711 BuchiCegarLoop]: Abstraction has 86 states and 106 transitions. [2019-11-25 08:52:10,065 INFO L591 BuchiCegarLoop]: Abstraction has 86 states and 106 transitions. [2019-11-25 08:52:10,065 INFO L424 BuchiCegarLoop]: ======== Iteration 7============ [2019-11-25 08:52:10,066 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 86 states and 106 transitions. [2019-11-25 08:52:10,066 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 22 [2019-11-25 08:52:10,067 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-25 08:52:10,067 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-25 08:52:10,067 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1] [2019-11-25 08:52:10,067 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-11-25 08:52:10,067 INFO L794 eck$LassoCheckResult]: Stem: 6179#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 6180#L25 call main_#t~ret6 := rec2(main_~x~0);< 6185#rec2ENTRY ~j := #in~j; 6207#L18 assume !(~j <= 0); 6204#L20 call #t~ret3 := rec1(~j - 1);< 6206#rec1ENTRY ~i := #in~i; 6205#L12 assume !(~i <= 0); 6175#L14 call #t~ret0 := rec1(~i - 2);< 6187#rec1ENTRY ~i := #in~i; 6156#L12 assume !(~i <= 0); 6155#L14 [2019-11-25 08:52:10,068 INFO L796 eck$LassoCheckResult]: Loop: 6155#L14 call #t~ret0 := rec1(~i - 2);< 6154#rec1ENTRY ~i := #in~i; 6156#L12 assume !(~i <= 0); 6155#L14 [2019-11-25 08:52:10,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:52:10,068 INFO L82 PathProgramCache]: Analyzing trace with hash -1371444593, now seen corresponding path program 3 times [2019-11-25 08:52:10,068 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:52:10,068 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086712523] [2019-11-25 08:52:10,069 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:52:10,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:52:10,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:52:10,074 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-25 08:52:10,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:52:10,074 INFO L82 PathProgramCache]: Analyzing trace with hash 54781, now seen corresponding path program 4 times [2019-11-25 08:52:10,075 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:52:10,075 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480254412] [2019-11-25 08:52:10,075 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:52:10,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:52:10,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:52:10,078 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-25 08:52:10,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:52:10,078 INFO L82 PathProgramCache]: Analyzing trace with hash 1318041775, now seen corresponding path program 4 times [2019-11-25 08:52:10,079 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:52:10,079 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109754942] [2019-11-25 08:52:10,079 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:52:10,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:52:10,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:52:10,085 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-25 08:52:10,118 INFO L210 LassoAnalysis]: Preferences: [2019-11-25 08:52:10,118 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-25 08:52:10,118 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-25 08:52:10,118 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-25 08:52:10,118 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-25 08:52:10,118 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:52:10,119 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-25 08:52:10,119 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-25 08:52:10,119 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration7_Loop [2019-11-25 08:52:10,119 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-25 08:52:10,119 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-25 08:52:10,119 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:52:10,130 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:52:10,132 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:52:10,134 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:52:10,136 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:52:10,164 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-25 08:52:10,164 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a6b645b8-0144-4e06-8cd2-74b3624256ca/bin/uautomizer/z3 Starting monitored process 47 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-25 08:52:10,177 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-25 08:52:10,177 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 47 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a6b645b8-0144-4e06-8cd2-74b3624256ca/bin/uautomizer/z3 Starting monitored process 48 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-25 08:52:10,193 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-25 08:52:10,193 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 48 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:52:15,670 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-25 08:52:15,672 INFO L210 LassoAnalysis]: Preferences: [2019-11-25 08:52:15,672 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-25 08:52:15,672 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-25 08:52:15,672 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-25 08:52:15,672 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-25 08:52:15,672 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:52:15,672 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-25 08:52:15,672 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-25 08:52:15,672 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration7_Loop [2019-11-25 08:52:15,672 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-25 08:52:15,672 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-25 08:52:15,673 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:52:15,680 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:52:15,682 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:52:15,683 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:52:15,684 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:52:15,721 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-25 08:52:15,721 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a6b645b8-0144-4e06-8cd2-74b3624256ca/bin/uautomizer/z3 Starting monitored process 49 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 49 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:52:15,726 INFO L120 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 [2019-11-25 08:52:15,727 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-25 08:52:15,727 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-25 08:52:15,727 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-25 08:52:15,727 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-25 08:52:15,727 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-25 08:52:15,728 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-25 08:52:15,728 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-25 08:52:15,732 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-25 08:52:15,740 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2019-11-25 08:52:15,740 INFO L444 ModelExtractionUtils]: 2 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a6b645b8-0144-4e06-8cd2-74b3624256ca/bin/uautomizer/z3 Starting monitored process 50 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-25 08:52:15,749 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-25 08:52:15,749 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-25 08:52:15,749 INFO L510 LassoAnalysis]: Proved termination. [2019-11-25 08:52:15,749 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_~i) = 1*rec1_~i Supporting invariants [] [2019-11-25 08:52:15,751 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed Waiting until toolchain timeout for monitored process 50 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:52:15,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:52:15,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:15,782 INFO L255 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-25 08:52:15,783 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:52:15,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:15,794 INFO L255 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-25 08:52:15,794 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:52:15,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:52:15,814 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 [2019-11-25 08:52:15,814 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 86 states and 106 transitions. cyclomatic complexity: 23 Second operand 4 states. [2019-11-25 08:52:15,858 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 86 states and 106 transitions. cyclomatic complexity: 23. Second operand 4 states. Result 100 states and 124 transitions. Complement of second has 11 states. [2019-11-25 08:52:15,858 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 1 stem states 3 non-accepting loop states 1 accepting loop states [2019-11-25 08:52:15,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2019-11-25 08:52:15,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 13 transitions. [2019-11-25 08:52:15,859 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 13 transitions. Stem has 10 letters. Loop has 3 letters. [2019-11-25 08:52:15,859 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-25 08:52:15,859 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 13 transitions. Stem has 13 letters. Loop has 3 letters. [2019-11-25 08:52:15,860 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-25 08:52:15,860 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 13 transitions. Stem has 10 letters. Loop has 6 letters. [2019-11-25 08:52:15,860 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-25 08:52:15,860 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 100 states and 124 transitions. [2019-11-25 08:52:15,861 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 22 [2019-11-25 08:52:15,863 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 100 states to 94 states and 117 transitions. [2019-11-25 08:52:15,863 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 83 [2019-11-25 08:52:15,863 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 84 [2019-11-25 08:52:15,863 INFO L73 IsDeterministic]: Start isDeterministic. Operand 94 states and 117 transitions. [2019-11-25 08:52:15,863 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-25 08:52:15,863 INFO L688 BuchiCegarLoop]: Abstraction has 94 states and 117 transitions. [2019-11-25 08:52:15,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states and 117 transitions. [2019-11-25 08:52:15,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 92. [2019-11-25 08:52:15,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2019-11-25 08:52:15,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 114 transitions. [2019-11-25 08:52:15,869 INFO L711 BuchiCegarLoop]: Abstraction has 92 states and 114 transitions. [2019-11-25 08:52:15,869 INFO L591 BuchiCegarLoop]: Abstraction has 92 states and 114 transitions. [2019-11-25 08:52:15,869 INFO L424 BuchiCegarLoop]: ======== Iteration 8============ [2019-11-25 08:52:15,869 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 92 states and 114 transitions. [2019-11-25 08:52:15,870 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 22 [2019-11-25 08:52:15,870 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-25 08:52:15,870 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-25 08:52:15,872 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [5, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:52:15,872 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [5, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2019-11-25 08:52:15,872 INFO L794 eck$LassoCheckResult]: Stem: 6436#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 6405#L25 call main_#t~ret6 := rec2(main_~x~0);< 6404#rec2ENTRY ~j := #in~j; 6406#L18 assume !(~j <= 0); 6439#L20 call #t~ret3 := rec1(~j - 1);< 6440#rec1ENTRY ~i := #in~i; 6461#L12 assume !(~i <= 0); 6424#L14 call #t~ret0 := rec1(~i - 2);< 6458#rec1ENTRY ~i := #in~i; 6475#L12 assume !(~i <= 0); 6408#L14 call #t~ret0 := rec1(~i - 2);< 6407#rec1ENTRY ~i := #in~i; 6409#L12 assume ~i <= 0;#res := 0; 6495#rec1FINAL assume true; 6493#rec1EXIT >#27#return; 6417#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 6423#rec1ENTRY ~i := #in~i; 6489#L12 assume ~i <= 0;#res := 0; 6488#rec1FINAL assume true; 6466#rec1EXIT >#29#return; 6467#L14-2 call #t~ret2 := rec1(#t~ret1);< 6479#rec1ENTRY ~i := #in~i; 6485#L12 assume ~i <= 0;#res := 0; 6484#rec1FINAL assume true; 6477#rec1EXIT >#31#return; 6476#L14-3 #res := 1 + #t~ret2;havoc #t~ret1;havoc #t~ret2;havoc #t~ret0; 6464#rec1FINAL assume true; 6465#rec1EXIT >#27#return; 6418#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 6454#rec1ENTRY [2019-11-25 08:52:15,873 INFO L796 eck$LassoCheckResult]: Loop: 6454#rec1ENTRY ~i := #in~i; 6482#L12 assume !(~i <= 0); 6422#L14 call #t~ret0 := rec1(~i - 2);< 6437#rec1ENTRY ~i := #in~i; 6481#L12 assume !(~i <= 0); 6415#L14 call #t~ret0 := rec1(~i - 2);< 6438#rec1ENTRY ~i := #in~i; 6435#L12 assume ~i <= 0;#res := 0; 6414#rec1FINAL assume true; 6416#rec1EXIT >#27#return; 6417#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 6423#rec1ENTRY ~i := #in~i; 6489#L12 assume ~i <= 0;#res := 0; 6488#rec1FINAL assume true; 6466#rec1EXIT >#29#return; 6467#L14-2 call #t~ret2 := rec1(#t~ret1);< 6479#rec1ENTRY ~i := #in~i; 6485#L12 assume ~i <= 0;#res := 0; 6484#rec1FINAL assume true; 6477#rec1EXIT >#31#return; 6476#L14-3 #res := 1 + #t~ret2;havoc #t~ret1;havoc #t~ret2;havoc #t~ret0; 6464#rec1FINAL assume true; 6465#rec1EXIT >#27#return; 6419#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 6454#rec1ENTRY [2019-11-25 08:52:15,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:52:15,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1733863270, now seen corresponding path program 1 times [2019-11-25 08:52:15,873 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:52:15,873 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669346206] [2019-11-25 08:52:15,874 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:52:15,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:52:15,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:52:15,897 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-25 08:52:15,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:52:15,898 INFO L82 PathProgramCache]: Analyzing trace with hash -165506564, now seen corresponding path program 1 times [2019-11-25 08:52:15,898 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:52:15,898 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898455103] [2019-11-25 08:52:15,899 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:52:15,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:52:15,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:52:15,914 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-25 08:52:15,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:52:15,914 INFO L82 PathProgramCache]: Analyzing trace with hash 2126813793, now seen corresponding path program 2 times [2019-11-25 08:52:15,915 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:52:15,915 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353842928] [2019-11-25 08:52:15,915 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:52:15,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:15,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:15,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:15,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:15,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:15,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:16,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:16,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:16,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:16,048 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 43 proven. 32 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2019-11-25 08:52:16,048 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353842928] [2019-11-25 08:52:16,049 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477741975] [2019-11-25 08:52:16,049 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a6b645b8-0144-4e06-8cd2-74b3624256ca/bin/uautomizer/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:52:16,085 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-25 08:52:16,085 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:52:16,086 INFO L255 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-25 08:52:16,087 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:52:16,095 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 109 proven. 2 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2019-11-25 08:52:16,095 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:52:16,095 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 11 [2019-11-25 08:52:16,096 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693272829] [2019-11-25 08:52:16,275 INFO L210 LassoAnalysis]: Preferences: [2019-11-25 08:52:16,275 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-25 08:52:16,276 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-25 08:52:16,276 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-25 08:52:16,276 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-25 08:52:16,276 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:52:16,276 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-25 08:52:16,276 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-25 08:52:16,276 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration8_Loop [2019-11-25 08:52:16,276 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-25 08:52:16,276 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-25 08:52:16,277 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:52:16,279 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:52:16,284 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:52:16,285 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:52:16,290 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:52:16,292 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:52:16,334 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-25 08:52:16,334 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a6b645b8-0144-4e06-8cd2-74b3624256ca/bin/uautomizer/z3 Starting monitored process 52 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 52 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:52:16,337 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-25 08:52:16,337 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-25 08:52:16,339 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-25 08:52:16,339 INFO L440 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/run_dir_a6b645b8-0144-4e06-8cd2-74b3624256ca/bin/uautomizer/z3 Starting monitored process 53 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-25 08:52:16,349 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-25 08:52:16,350 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 53 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:52:16,353 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-25 08:52:16,353 INFO L440 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/run_dir_a6b645b8-0144-4e06-8cd2-74b3624256ca/bin/uautomizer/z3 Starting monitored process 54 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 54 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:52:16,359 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-25 08:52:16,359 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-25 08:52:16,361 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-25 08:52:16,362 INFO L440 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/run_dir_a6b645b8-0144-4e06-8cd2-74b3624256ca/bin/uautomizer/z3 Starting monitored process 55 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 55 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:52:16,365 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-25 08:52:16,366 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a6b645b8-0144-4e06-8cd2-74b3624256ca/bin/uautomizer/z3 Starting monitored process 56 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 56 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:52:16,374 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-25 08:52:16,374 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-25 08:52:16,379 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-25 08:52:16,380 INFO L210 LassoAnalysis]: Preferences: [2019-11-25 08:52:16,380 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-25 08:52:16,380 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-25 08:52:16,380 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-25 08:52:16,381 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-25 08:52:16,381 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:52:16,381 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-25 08:52:16,381 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-25 08:52:16,381 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b.c_Iteration8_Loop [2019-11-25 08:52:16,381 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-25 08:52:16,381 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-25 08:52:16,382 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:52:16,384 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:52:16,386 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:52:16,392 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:52:16,394 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:52:16,396 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:52:16,422 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-25 08:52:16,422 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a6b645b8-0144-4e06-8cd2-74b3624256ca/bin/uautomizer/z3 Starting monitored process 57 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-25 08:52:16,429 INFO L120 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 [2019-11-25 08:52:16,431 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-25 08:52:16,431 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-25 08:52:16,431 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-25 08:52:16,431 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-25 08:52:16,431 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-25 08:52:16,432 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-25 08:52:16,432 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 57 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:52:16,436 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a6b645b8-0144-4e06-8cd2-74b3624256ca/bin/uautomizer/z3 Starting monitored process 58 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 58 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:52:16,440 INFO L120 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 [2019-11-25 08:52:16,441 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-25 08:52:16,441 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-25 08:52:16,441 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-25 08:52:16,442 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-25 08:52:16,442 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-25 08:52:16,442 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-25 08:52:16,442 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-25 08:52:16,443 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a6b645b8-0144-4e06-8cd2-74b3624256ca/bin/uautomizer/z3 Starting monitored process 59 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 59 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:52:16,447 INFO L120 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 [2019-11-25 08:52:16,449 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-25 08:52:16,449 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-25 08:52:16,449 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-25 08:52:16,449 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-25 08:52:16,449 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-25 08:52:16,450 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-25 08:52:16,450 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-25 08:52:16,451 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-25 08:52:16,454 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-25 08:52:16,454 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a6b645b8-0144-4e06-8cd2-74b3624256ca/bin/uautomizer/z3 Starting monitored process 60 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 60 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:52:16,457 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-25 08:52:16,457 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-25 08:52:16,457 INFO L510 LassoAnalysis]: Proved termination. [2019-11-25 08:52:16,457 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] [2019-11-25 08:52:16,458 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-25 08:52:16,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:52:16,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:16,514 INFO L255 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-25 08:52:16,515 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:52:16,533 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:52:16,535 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:52:16,537 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:52:16,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:16,571 INFO L255 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-25 08:52:16,572 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:52:16,684 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-11-25 08:52:16,684 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 9 loop predicates [2019-11-25 08:52:16,685 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 92 states and 114 transitions. cyclomatic complexity: 26 Second operand 11 states. [2019-11-25 08:52:16,741 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 92 states and 114 transitions. cyclomatic complexity: 26. Second operand 11 states. Result 100 states and 122 transitions. Complement of second has 7 states. [2019-11-25 08:52:16,742 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 [2019-11-25 08:52:16,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-11-25 08:52:16,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 15 transitions. [2019-11-25 08:52:16,756 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 15 transitions. Stem has 29 letters. Loop has 24 letters. [2019-11-25 08:52:16,757 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-25 08:52:16,757 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-25 08:52:16,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:52:16,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:16,811 INFO L255 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-25 08:52:16,812 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:52:16,832 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:52:16,834 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:52:16,835 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:52:16,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:16,870 INFO L255 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-25 08:52:16,871 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:52:16,968 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-11-25 08:52:16,968 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 9 loop predicates [2019-11-25 08:52:16,969 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 92 states and 114 transitions. cyclomatic complexity: 26 Second operand 11 states. [2019-11-25 08:52:17,024 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 92 states and 114 transitions. cyclomatic complexity: 26. Second operand 11 states. Result 100 states and 122 transitions. Complement of second has 7 states. [2019-11-25 08:52:17,028 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 [2019-11-25 08:52:17,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-11-25 08:52:17,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 15 transitions. [2019-11-25 08:52:17,029 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 15 transitions. Stem has 29 letters. Loop has 24 letters. [2019-11-25 08:52:17,029 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-25 08:52:17,029 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-25 08:52:17,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:52:17,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:17,082 INFO L255 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-25 08:52:17,083 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:52:17,102 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:52:17,104 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:52:17,105 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:52:17,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:17,134 INFO L255 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-25 08:52:17,135 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:52:17,251 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-11-25 08:52:17,251 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 9 loop predicates [2019-11-25 08:52:17,252 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 92 states and 114 transitions. cyclomatic complexity: 26 Second operand 11 states. [2019-11-25 08:52:17,504 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 92 states and 114 transitions. cyclomatic complexity: 26. Second operand 11 states. Result 257 states and 303 transitions. Complement of second has 31 states. [2019-11-25 08:52:17,508 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 11 states 2 stem states 8 non-accepting loop states 1 accepting loop states [2019-11-25 08:52:17,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-11-25 08:52:17,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 38 transitions. [2019-11-25 08:52:17,510 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 38 transitions. Stem has 29 letters. Loop has 24 letters. [2019-11-25 08:52:17,510 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-25 08:52:17,510 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-25 08:52:17,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:52:17,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:17,583 INFO L255 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-25 08:52:17,584 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:52:17,606 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:52:17,608 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:52:17,609 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-25 08:52:17,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:52:17,641 INFO L255 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-25 08:52:17,644 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:52:17,791 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-11-25 08:52:17,791 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and with honda bouncer for loop.2 stem predicates 9 loop predicates [2019-11-25 08:52:17,791 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 92 states and 114 transitions. cyclomatic complexity: 26 Second operand 11 states. [2019-11-25 08:52:18,354 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 92 states and 114 transitions. cyclomatic complexity: 26. Second operand 11 states. Result 409 states and 515 transitions. Complement of second has 80 states. [2019-11-25 08:52:18,356 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 15 states 2 stem states 12 non-accepting loop states 1 accepting loop states [2019-11-25 08:52:18,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-11-25 08:52:18,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 49 transitions. [2019-11-25 08:52:18,356 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 15 states and 49 transitions. Stem has 29 letters. Loop has 24 letters. [2019-11-25 08:52:18,357 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-25 08:52:18,357 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 15 states and 49 transitions. Stem has 53 letters. Loop has 24 letters. [2019-11-25 08:52:18,357 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-25 08:52:18,358 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 15 states and 49 transitions. Stem has 29 letters. Loop has 48 letters. [2019-11-25 08:52:18,358 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-25 08:52:18,358 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 409 states and 515 transitions. [2019-11-25 08:52:18,367 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 62 [2019-11-25 08:52:18,370 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 409 states to 253 states and 345 transitions. [2019-11-25 08:52:18,371 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 154 [2019-11-25 08:52:18,371 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 164 [2019-11-25 08:52:18,371 INFO L73 IsDeterministic]: Start isDeterministic. Operand 253 states and 345 transitions. [2019-11-25 08:52:18,371 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-25 08:52:18,371 INFO L688 BuchiCegarLoop]: Abstraction has 253 states and 345 transitions. [2019-11-25 08:52:18,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states and 345 transitions. [2019-11-25 08:52:18,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 216. [2019-11-25 08:52:18,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2019-11-25 08:52:18,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 270 transitions. [2019-11-25 08:52:18,381 INFO L711 BuchiCegarLoop]: Abstraction has 216 states and 270 transitions. [2019-11-25 08:52:18,381 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:52:18,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-25 08:52:18,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2019-11-25 08:52:18,382 INFO L87 Difference]: Start difference. First operand 216 states and 270 transitions. Second operand 11 states. [2019-11-25 08:52:18,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:52:18,522 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2019-11-25 08:52:18,522 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-25 08:52:18,523 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 35 states and 37 transitions. [2019-11-25 08:52:18,523 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2019-11-25 08:52:18,523 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 35 states to 0 states and 0 transitions. [2019-11-25 08:52:18,523 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2019-11-25 08:52:18,523 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2019-11-25 08:52:18,523 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2019-11-25 08:52:18,524 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2019-11-25 08:52:18,524 INFO L688 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-25 08:52:18,524 INFO L711 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-25 08:52:18,524 INFO L591 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-25 08:52:18,524 INFO L424 BuchiCegarLoop]: ======== Iteration 9============ [2019-11-25 08:52:18,524 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2019-11-25 08:52:18,524 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2019-11-25 08:52:18,524 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2019-11-25 08:52:18,533 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 25.11 08:52:18 BoogieIcfgContainer [2019-11-25 08:52:18,537 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2019-11-25 08:52:18,538 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-25 08:52:18,539 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-25 08:52:18,539 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-25 08:52:18,539 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:52:00" (3/4) ... [2019-11-25 08:52:18,542 INFO L140 WitnessPrinter]: No result that supports witness generation found [2019-11-25 08:52:18,543 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-25 08:52:18,545 INFO L168 Benchmark]: Toolchain (without parser) took 18323.09 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 191.9 MB). Free memory was 944.7 MB in the beginning and 883.0 MB in the end (delta: 61.7 MB). Peak memory consumption was 253.6 MB. Max. memory is 11.5 GB. [2019-11-25 08:52:18,545 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-25 08:52:18,546 INFO L168 Benchmark]: CACSL2BoogieTranslator took 259.49 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 131.6 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -181.7 MB). Peak memory consumption was 23.1 MB. Max. memory is 11.5 GB. [2019-11-25 08:52:18,546 INFO L168 Benchmark]: Boogie Procedure Inliner took 29.78 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-25 08:52:18,546 INFO L168 Benchmark]: Boogie Preprocessor took 12.87 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-25 08:52:18,547 INFO L168 Benchmark]: RCFGBuilder took 238.77 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 18.3 MB). Peak memory consumption was 18.3 MB. Max. memory is 11.5 GB. [2019-11-25 08:52:18,547 INFO L168 Benchmark]: BuchiAutomizer took 17769.81 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 60.3 MB). Free memory was 1.1 GB in the beginning and 889.2 MB in the end (delta: 218.9 MB). Peak memory consumption was 279.2 MB. Max. memory is 11.5 GB. [2019-11-25 08:52:18,548 INFO L168 Benchmark]: Witness Printer took 4.67 ms. Allocated memory is still 1.2 GB. Free memory was 889.2 MB in the beginning and 883.0 MB in the end (delta: 6.2 MB). Peak memory consumption was 6.2 MB. Max. memory is 11.5 GB. [2019-11-25 08:52:18,551 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 259.49 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 131.6 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -181.7 MB). Peak memory consumption was 23.1 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 29.78 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 12.87 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 238.77 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 18.3 MB). Peak memory consumption was 18.3 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 17769.81 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 60.3 MB). Free memory was 1.1 GB in the beginning and 889.2 MB in the end (delta: 218.9 MB). Peak memory consumption was 279.2 MB. Max. memory is 11.5 GB. * Witness Printer took 4.67 ms. Allocated memory is still 1.2 GB. Free memory was 889.2 MB in the beginning and 883.0 MB in the end (delta: 6.2 MB). Peak memory consumption was 6.2 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 12 terminating modules (5 trivial, 5 deterministic, 2 nondeterministic). One deterministic module has affine ranking function \old(j) and consists of 11 locations. One deterministic module has affine ranking function \old(i) and consists of 4 locations. One deterministic module has affine ranking function \old(i) and consists of 5 locations. One deterministic module has affine ranking function org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@505837ca and consists of 11 locations. One deterministic module has affine ranking function i and consists of 5 locations. One nondeterministic module has affine ranking function \old(i) and consists of 5 locations. One nondeterministic module has affine ranking function \old(i) and consists of 15 locations. 5 modules have a trivial ranking function, the largest among these consists of 12 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 17.7s and 9 iterations. TraceHistogramMax:5. Analysis of lassos took 12.2s. Construction of modules took 1.1s. Büchi inclusion checks took 3.8s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 11. Automata minimization 0.1s AutomataMinimizationTime, 11 MinimizatonAttempts, 249 StatesRemovedByMinimization, 11 NontrivialMinimizations. Non-live state removal took 0.1s Buchi closure took 0.0s. Biggest automaton had 314 states and ocurred in iteration 5. Nontrivial modules had stage [5, 0, 1, 1, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 38/58 HoareTripleCheckerStatistics: 284 SDtfs, 352 SDslu, 489 SDs, 0 SdLazy, 977 SolverSat, 338 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.1s Time LassoAnalysisResults: nont0 unkn0 SFLI1 SFLT3 conc0 concLT3 SILN0 SILU0 SILI0 SILT1 lasso0 LassoPreprocessingBenchmarks: Lassos: inital12 mio100 ax100 hnf98 lsp100 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq154 hnf92 smp100 dnf100 smp100 tf111 neg100 sie110 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 14ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 14 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 7 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 9.0s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...