./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/termination-crafted/NestedRecursion_2b.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version cad46833 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_8adef5d6-17cd-4dca-b8ed-f2a3941aedbd/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_8adef5d6-17cd-4dca-b8ed-f2a3941aedbd/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_8adef5d6-17cd-4dca-b8ed-f2a3941aedbd/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_8adef5d6-17cd-4dca-b8ed-f2a3941aedbd/bin/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-crafted/NestedRecursion_2b.c -s /tmp/vcloud-vcloud-master/worker/run_dir_8adef5d6-17cd-4dca-b8ed-f2a3941aedbd/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_8adef5d6-17cd-4dca-b8ed-f2a3941aedbd/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 1b7166d94206693c3f254a3c1de8d5825f8510fb .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(TERM) --- Real Ultimate output --- This is Ultimate 0.1.24-cad4683 [2019-11-15 21:59:20,531 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-15 21:59:20,533 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-15 21:59:20,547 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-15 21:59:20,548 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-15 21:59:20,549 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-15 21:59:20,551 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-15 21:59:20,559 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-15 21:59:20,563 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-15 21:59:20,567 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-15 21:59:20,568 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-15 21:59:20,569 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-15 21:59:20,570 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-15 21:59:20,571 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-15 21:59:20,572 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-15 21:59:20,573 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-15 21:59:20,574 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-15 21:59:20,575 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-15 21:59:20,576 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-15 21:59:20,578 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-15 21:59:20,579 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-15 21:59:20,580 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-15 21:59:20,581 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-15 21:59:20,581 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-15 21:59:20,583 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-15 21:59:20,583 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-15 21:59:20,583 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-15 21:59:20,583 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-15 21:59:20,583 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-15 21:59:20,584 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-15 21:59:20,584 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-15 21:59:20,585 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-15 21:59:20,585 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-15 21:59:20,585 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-15 21:59:20,586 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-15 21:59:20,586 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-15 21:59:20,587 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-15 21:59:20,587 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-15 21:59:20,587 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-15 21:59:20,588 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-15 21:59:20,589 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-15 21:59:20,589 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_8adef5d6-17cd-4dca-b8ed-f2a3941aedbd/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf [2019-11-15 21:59:20,604 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-15 21:59:20,605 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-15 21:59:20,606 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-15 21:59:20,606 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-15 21:59:20,606 INFO L138 SettingsManager]: * Use SBE=true [2019-11-15 21:59:20,606 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2019-11-15 21:59:20,607 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2019-11-15 21:59:20,607 INFO L138 SettingsManager]: * Use old map elimination=false [2019-11-15 21:59:20,607 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2019-11-15 21:59:20,607 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2019-11-15 21:59:20,607 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2019-11-15 21:59:20,608 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-15 21:59:20,608 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-15 21:59:20,608 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-15 21:59:20,608 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-15 21:59:20,608 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2019-11-15 21:59:20,609 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2019-11-15 21:59:20,609 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2019-11-15 21:59:20,609 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-15 21:59:20,609 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2019-11-15 21:59:20,609 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-15 21:59:20,610 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2019-11-15 21:59:20,610 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-15 21:59:20,610 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-15 21:59:20,610 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2019-11-15 21:59:20,611 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-15 21:59:20,611 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-15 21:59:20,611 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2019-11-15 21:59:20,612 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2019-11-15 21:59:20,612 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_8adef5d6-17cd-4dca-b8ed-f2a3941aedbd/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 -> 1b7166d94206693c3f254a3c1de8d5825f8510fb [2019-11-15 21:59:20,639 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-15 21:59:20,649 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-15 21:59:20,652 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-15 21:59:20,653 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-15 21:59:20,653 INFO L275 PluginConnector]: CDTParser initialized [2019-11-15 21:59:20,654 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_8adef5d6-17cd-4dca-b8ed-f2a3941aedbd/bin/uautomizer/../../sv-benchmarks/c/termination-crafted/NestedRecursion_2b.c [2019-11-15 21:59:20,703 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_8adef5d6-17cd-4dca-b8ed-f2a3941aedbd/bin/uautomizer/data/fe4cec8ed/0868cab0c8144d8a8dbeae2ad3e972a9/FLAGd2e6f1a49 [2019-11-15 21:59:21,118 INFO L306 CDTParser]: Found 1 translation units. [2019-11-15 21:59:21,119 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_8adef5d6-17cd-4dca-b8ed-f2a3941aedbd/sv-benchmarks/c/termination-crafted/NestedRecursion_2b.c [2019-11-15 21:59:21,124 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_8adef5d6-17cd-4dca-b8ed-f2a3941aedbd/bin/uautomizer/data/fe4cec8ed/0868cab0c8144d8a8dbeae2ad3e972a9/FLAGd2e6f1a49 [2019-11-15 21:59:21,136 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_8adef5d6-17cd-4dca-b8ed-f2a3941aedbd/bin/uautomizer/data/fe4cec8ed/0868cab0c8144d8a8dbeae2ad3e972a9 [2019-11-15 21:59:21,138 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-15 21:59:21,140 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-15 21:59:21,145 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-15 21:59:21,145 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-15 21:59:21,149 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-15 21:59:21,149 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.11 09:59:21" (1/1) ... [2019-11-15 21:59:21,152 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29c2a5de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 09:59:21, skipping insertion in model container [2019-11-15 21:59:21,152 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.11 09:59:21" (1/1) ... [2019-11-15 21:59:21,159 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-15 21:59:21,176 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-15 21:59:21,326 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-15 21:59:21,330 INFO L188 MainTranslator]: Completed pre-run [2019-11-15 21:59:21,400 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-15 21:59:21,417 INFO L192 MainTranslator]: Completed translation [2019-11-15 21:59:21,417 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 09:59:21 WrapperNode [2019-11-15 21:59:21,417 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-15 21:59:21,418 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-15 21:59:21,418 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-15 21:59:21,418 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-15 21:59:21,426 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 09:59:21" (1/1) ... [2019-11-15 21:59:21,432 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 09:59:21" (1/1) ... [2019-11-15 21:59:21,448 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-15 21:59:21,448 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-15 21:59:21,449 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-15 21:59:21,449 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-15 21:59:21,457 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 09:59:21" (1/1) ... [2019-11-15 21:59:21,457 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 09:59:21" (1/1) ... [2019-11-15 21:59:21,458 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 09:59:21" (1/1) ... [2019-11-15 21:59:21,458 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 09:59:21" (1/1) ... [2019-11-15 21:59:21,460 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 09:59:21" (1/1) ... [2019-11-15 21:59:21,462 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 09:59:21" (1/1) ... [2019-11-15 21:59:21,463 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 09:59:21" (1/1) ... [2019-11-15 21:59:21,464 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-15 21:59:21,464 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-15 21:59:21,464 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-15 21:59:21,465 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-15 21:59:21,465 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 09:59:21" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8adef5d6-17cd-4dca-b8ed-f2a3941aedbd/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 [2019-11-15 21:59:21,528 INFO L130 BoogieDeclarations]: Found specification of procedure g [2019-11-15 21:59:21,528 INFO L138 BoogieDeclarations]: Found implementation of procedure g [2019-11-15 21:59:21,529 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-15 21:59:21,529 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-15 21:59:21,683 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-15 21:59:21,684 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-15 21:59:21,685 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 09:59:21 BoogieIcfgContainer [2019-11-15 21:59:21,685 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-15 21:59:21,686 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2019-11-15 21:59:21,686 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2019-11-15 21:59:21,689 INFO L275 PluginConnector]: BuchiAutomizer initialized [2019-11-15 21:59:21,689 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-15 21:59:21,689 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 15.11 09:59:21" (1/3) ... [2019-11-15 21:59:21,690 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@7346037e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 15.11 09:59:21, skipping insertion in model container [2019-11-15 21:59:21,690 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-15 21:59:21,690 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 09:59:21" (2/3) ... [2019-11-15 21:59:21,691 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@7346037e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 15.11 09:59:21, skipping insertion in model container [2019-11-15 21:59:21,691 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-15 21:59:21,691 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 09:59:21" (3/3) ... [2019-11-15 21:59:21,693 INFO L371 chiAutomizerObserver]: Analyzing ICFG NestedRecursion_2b.c [2019-11-15 21:59:21,761 INFO L356 BuchiCegarLoop]: Interprodecural is true [2019-11-15 21:59:21,762 INFO L357 BuchiCegarLoop]: Hoare is false [2019-11-15 21:59:21,762 INFO L358 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2019-11-15 21:59:21,762 INFO L359 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-15 21:59:21,762 INFO L360 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-15 21:59:21,763 INFO L361 BuchiCegarLoop]: Difference is false [2019-11-15 21:59:21,763 INFO L362 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-15 21:59:21,763 INFO L365 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2019-11-15 21:59:21,776 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 14 states. [2019-11-15 21:59:21,801 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2019-11-15 21:59:21,801 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-15 21:59:21,801 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-15 21:59:21,809 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2019-11-15 21:59:21,809 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-11-15 21:59:21,810 INFO L424 BuchiCegarLoop]: ======== Iteration 1============ [2019-11-15 21:59:21,810 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 14 states. [2019-11-15 21:59:21,812 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2019-11-15 21:59:21,812 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-15 21:59:21,812 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-15 21:59:21,812 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2019-11-15 21:59:21,813 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-11-15 21:59:21,820 INFO L791 eck$LassoCheckResult]: Stem: 10#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet2, main_#t~ret3, main_~x~0;main_~x~0 := main_#t~nondet2;havoc main_#t~nondet2; 7#L20true assume !(main_~x~0 < 0); 9#L21true call main_#t~ret3 := g(main_~x~0);< 11#gENTRYtrue [2019-11-15 21:59:21,821 INFO L793 eck$LassoCheckResult]: Loop: 11#gENTRYtrue ~x := #in~x; 3#L12true assume !(0 == ~x); 13#L15true call #t~ret0 := g(~x - 1);< 11#gENTRYtrue [2019-11-15 21:59:21,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 21:59:21,826 INFO L82 PathProgramCache]: Analyzing trace with hash 39891, now seen corresponding path program 1 times [2019-11-15 21:59:21,834 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 21:59:21,834 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326728142] [2019-11-15 21:59:21,835 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:59:21,835 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:59:21,835 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 21:59:21,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-15 21:59:21,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-15 21:59:21,920 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-15 21:59:21,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 21:59:21,922 INFO L82 PathProgramCache]: Analyzing trace with hash 29936, now seen corresponding path program 1 times [2019-11-15 21:59:21,922 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 21:59:21,922 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269807638] [2019-11-15 21:59:21,922 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:59:21,923 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:59:21,923 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 21:59:21,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-15 21:59:21,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-15 21:59:21,935 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-15 21:59:21,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 21:59:21,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1188392926, now seen corresponding path program 1 times [2019-11-15 21:59:21,937 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 21:59:21,937 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642678031] [2019-11-15 21:59:21,937 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:59:21,938 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:59:21,938 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 21:59:21,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-15 21:59:21,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-15 21:59:21,955 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-15 21:59:22,046 INFO L210 LassoAnalysis]: Preferences: [2019-11-15 21:59:22,047 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2019-11-15 21:59:22,047 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-15 21:59:22,047 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2019-11-15 21:59:22,047 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2019-11-15 21:59:22,047 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-15 21:59:22,048 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-15 21:59:22,048 INFO L130 ssoRankerPreferences]: Path of dumped script: [2019-11-15 21:59:22,048 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_2b.c_Iteration1_Loop [2019-11-15 21:59:22,048 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-15 21:59:22,048 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-15 21:59:22,063 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-15 21:59:22,074 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-15 21:59:22,080 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-15 21:59:22,083 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-15 21:59:22,086 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-15 21:59:22,170 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-15 21:59:22,171 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8adef5d6-17cd-4dca-b8ed-f2a3941aedbd/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) [2019-11-15 21:59:22,180 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-15 21:59:22,180 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 [2019-11-15 21:59:22,189 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-15 21:59:22,189 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_~x=0} Honda state: {g_~x=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8adef5d6-17cd-4dca-b8ed-f2a3941aedbd/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) [2019-11-15 21:59:22,207 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-15 21:59:22,207 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-15 21:59:22,212 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-15 21:59:22,212 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#t~ret1=0} Honda state: {g_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8adef5d6-17cd-4dca-b8ed-f2a3941aedbd/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) [2019-11-15 21:59:22,231 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-15 21:59:22,231 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-15 21:59:22,240 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-15 21:59:22,240 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#res=0} Honda state: {g_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8adef5d6-17cd-4dca-b8ed-f2a3941aedbd/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) [2019-11-15 21:59:22,256 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-15 21:59:22,256 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-15 21:59:22,261 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-15 21:59:22,261 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#t~ret0=0} Honda state: {g_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8adef5d6-17cd-4dca-b8ed-f2a3941aedbd/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 [2019-11-15 21:59:22,275 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-15 21:59:22,275 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8adef5d6-17cd-4dca-b8ed-f2a3941aedbd/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 [2019-11-15 21:59:22,295 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-15 21:59:22,295 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-15 21:59:22,314 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-15 21:59:22,315 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#in~x=-1} Honda state: {g_#in~x=-1} Generalized eigenvectors: [{g_#in~x=0}, {g_#in~x=0}, {g_#in~x=-1}] Lambdas: [9, 10, 1] Nus: [1, 0] [2019-11-15 21:59:22,342 INFO L210 LassoAnalysis]: Preferences: [2019-11-15 21:59:22,343 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2019-11-15 21:59:22,343 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-15 21:59:22,343 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2019-11-15 21:59:22,343 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2019-11-15 21:59:22,343 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-15 21:59:22,343 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-15 21:59:22,343 INFO L130 ssoRankerPreferences]: Path of dumped script: [2019-11-15 21:59:22,343 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_2b.c_Iteration1_Lasso [2019-11-15 21:59:22,344 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-15 21:59:22,344 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-15 21:59:22,345 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-15 21:59:22,349 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-15 21:59:22,352 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-15 21:59:22,355 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-15 21:59:22,358 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-15 21:59:22,360 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-15 21:59:22,363 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-15 21:59:22,372 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-15 21:59:22,378 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-15 21:59:22,381 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-15 21:59:22,456 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-15 21:59:22,456 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8adef5d6-17cd-4dca-b8ed-f2a3941aedbd/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) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-15 21:59:22,461 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-15 21:59:22,461 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-15 21:59:22,466 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-15 21:59:22,466 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_#res=0} Honda state: {ULTIMATE.start_main_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8adef5d6-17cd-4dca-b8ed-f2a3941aedbd/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) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-15 21:59:22,476 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-15 21:59:22,476 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-15 21:59:22,480 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-15 21:59:22,480 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#t~ret1=0} Honda state: {g_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8adef5d6-17cd-4dca-b8ed-f2a3941aedbd/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) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-15 21:59:22,487 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-15 21:59:22,487 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-15 21:59:22,490 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-15 21:59:22,490 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#res=0} Honda state: {g_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8adef5d6-17cd-4dca-b8ed-f2a3941aedbd/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) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-15 21:59:22,502 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-15 21:59:22,502 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-15 21:59:22,510 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-15 21:59:22,510 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#t~ret0=0} Honda state: {g_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8adef5d6-17cd-4dca-b8ed-f2a3941aedbd/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) [2019-11-15 21:59:22,526 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-15 21:59:22,526 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-15 21:59:22,530 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-15 21:59:22,531 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_#t~ret4=0} Honda state: {ULTIMATE.start_#t~ret4=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8adef5d6-17cd-4dca-b8ed-f2a3941aedbd/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 [2019-11-15 21:59:22,538 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-15 21:59:22,539 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-15 21:59:22,544 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-15 21:59:22,544 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_#t~nondet2=0} Honda state: {ULTIMATE.start_main_#t~nondet2=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8adef5d6-17cd-4dca-b8ed-f2a3941aedbd/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) [2019-11-15 21:59:22,563 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-15 21:59:22,563 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8adef5d6-17cd-4dca-b8ed-f2a3941aedbd/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) [2019-11-15 21:59:22,588 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-15 21:59:22,588 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-15 21:59:22,608 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-15 21:59:22,610 INFO L210 LassoAnalysis]: Preferences: [2019-11-15 21:59:22,610 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2019-11-15 21:59:22,610 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-15 21:59:22,611 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2019-11-15 21:59:22,611 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2019-11-15 21:59:22,611 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-15 21:59:22,611 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-15 21:59:22,611 INFO L130 ssoRankerPreferences]: Path of dumped script: [2019-11-15 21:59:22,611 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_2b.c_Iteration1_Lasso [2019-11-15 21:59:22,611 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-15 21:59:22,611 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-15 21:59:22,613 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-15 21:59:22,619 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-15 21:59:22,622 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-15 21:59:22,627 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-15 21:59:22,629 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-15 21:59:22,634 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-15 21:59:22,640 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-15 21:59:22,643 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-15 21:59:22,647 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-15 21:59:22,651 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-15 21:59:22,728 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-15 21:59:22,732 INFO L489 LassoAnalysis]: Using template 'affine'. [2019-11-15 21:59:22,734 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 [2019-11-15 21:59:22,735 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-11-15 21:59:22,735 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-15 21:59:22,736 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-15 21:59:22,736 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-15 21:59:22,736 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-15 21:59:22,738 INFO L400 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-15 21:59:22,738 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-15 21:59:22,741 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-11-15 21:59:22,744 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 [2019-11-15 21:59:22,745 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-11-15 21:59:22,745 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-15 21:59:22,745 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-15 21:59:22,747 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-15 21:59:22,747 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-15 21:59:22,749 INFO L400 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-15 21:59:22,749 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-15 21:59:22,754 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-11-15 21:59:22,754 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 [2019-11-15 21:59:22,755 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-11-15 21:59:22,755 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-15 21:59:22,756 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-15 21:59:22,756 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-15 21:59:22,760 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-15 21:59:22,762 INFO L400 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-15 21:59:22,762 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-15 21:59:22,768 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-11-15 21:59:22,768 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 [2019-11-15 21:59:22,769 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-11-15 21:59:22,769 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-15 21:59:22,770 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-15 21:59:22,770 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-15 21:59:22,770 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-15 21:59:22,771 INFO L400 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-15 21:59:22,771 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-15 21:59:22,778 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-11-15 21:59:22,779 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 [2019-11-15 21:59:22,779 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-11-15 21:59:22,779 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-15 21:59:22,780 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-15 21:59:22,780 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-15 21:59:22,780 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-15 21:59:22,780 INFO L400 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-15 21:59:22,781 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-15 21:59:22,781 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-11-15 21:59:22,782 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 [2019-11-15 21:59:22,782 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-11-15 21:59:22,783 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-15 21:59:22,783 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-15 21:59:22,783 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-15 21:59:22,783 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-15 21:59:22,783 INFO L400 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-15 21:59:22,784 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-15 21:59:22,784 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-11-15 21:59:22,785 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 [2019-11-15 21:59:22,785 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-11-15 21:59:22,786 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-15 21:59:22,786 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-15 21:59:22,786 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-15 21:59:22,786 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-15 21:59:22,786 INFO L400 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-15 21:59:22,787 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-15 21:59:22,787 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-11-15 21:59:22,788 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 [2019-11-15 21:59:22,788 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-11-15 21:59:22,789 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-15 21:59:22,789 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-15 21:59:22,789 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-15 21:59:22,789 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-15 21:59:22,792 INFO L400 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-15 21:59:22,793 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-15 21:59:22,813 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-11-15 21:59:22,813 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 [2019-11-15 21:59:22,814 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-11-15 21:59:22,815 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-15 21:59:22,815 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-15 21:59:22,815 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-15 21:59:22,815 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-15 21:59:22,816 INFO L400 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-15 21:59:22,816 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-15 21:59:22,818 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-11-15 21:59:22,821 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 [2019-11-15 21:59:22,822 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-11-15 21:59:22,822 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-15 21:59:22,823 INFO L203 nArgumentSynthesizer]: 2 loop disjuncts [2019-11-15 21:59:22,823 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-15 21:59:22,831 INFO L400 nArgumentSynthesizer]: We have 16 Motzkin's Theorem applications. [2019-11-15 21:59:22,831 INFO L401 nArgumentSynthesizer]: A total of 4 supporting invariants were added. [2019-11-15 21:59:22,930 INFO L419 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-15 21:59:23,012 INFO L443 ModelExtractionUtils]: Simplification made 6 calls to the SMT solver. [2019-11-15 21:59:23,012 INFO L444 ModelExtractionUtils]: 5 out of 11 variables were initially zero. Simplification set additionally 3 variables to zero. [2019-11-15 21:59:23,014 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-15 21:59:23,017 INFO L438 nArgumentSynthesizer]: Removed 3 redundant supporting invariants from a total of 4. [2019-11-15 21:59:23,018 INFO L510 LassoAnalysis]: Proved termination. [2019-11-15 21:59:23,018 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(g_#in~x) = 1*g_#in~x Supporting invariants [1*g_#in~x >= 0] [2019-11-15 21:59:23,026 INFO L297 tatePredicateManager]: 0 out of 1 supporting invariants were superfluous and have been removed [2019-11-15 21:59:23,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 21:59:23,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 21:59:23,077 INFO L256 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-15 21:59:23,079 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 21:59:23,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 21:59:23,118 INFO L256 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-15 21:59:23,119 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 21:59:23,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 21:59:23,180 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 [2019-11-15 21:59:23,181 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 14 states. Second operand 5 states. [2019-11-15 21:59:23,365 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 14 states.. Second operand 5 states. Result 35 states and 42 transitions. Complement of second has 13 states. [2019-11-15 21:59:23,366 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 [2019-11-15 21:59:23,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-11-15 21:59:23,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 11 transitions. [2019-11-15 21:59:23,370 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 11 transitions. Stem has 3 letters. Loop has 3 letters. [2019-11-15 21:59:23,371 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-15 21:59:23,371 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 11 transitions. Stem has 6 letters. Loop has 3 letters. [2019-11-15 21:59:23,371 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-15 21:59:23,371 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 11 transitions. Stem has 3 letters. Loop has 6 letters. [2019-11-15 21:59:23,372 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-15 21:59:23,373 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 35 states and 42 transitions. [2019-11-15 21:59:23,378 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2019-11-15 21:59:23,385 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 35 states to 19 states and 25 transitions. [2019-11-15 21:59:23,386 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 13 [2019-11-15 21:59:23,386 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 14 [2019-11-15 21:59:23,387 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 25 transitions. [2019-11-15 21:59:23,388 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-15 21:59:23,389 INFO L688 BuchiCegarLoop]: Abstraction has 19 states and 25 transitions. [2019-11-15 21:59:23,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states and 25 transitions. [2019-11-15 21:59:23,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2019-11-15 21:59:23,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-15 21:59:23,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2019-11-15 21:59:23,414 INFO L711 BuchiCegarLoop]: Abstraction has 17 states and 21 transitions. [2019-11-15 21:59:23,414 INFO L591 BuchiCegarLoop]: Abstraction has 17 states and 21 transitions. [2019-11-15 21:59:23,415 INFO L424 BuchiCegarLoop]: ======== Iteration 2============ [2019-11-15 21:59:23,415 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 17 states and 21 transitions. [2019-11-15 21:59:23,416 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2019-11-15 21:59:23,416 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-15 21:59:23,416 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-15 21:59:23,417 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 21:59:23,417 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1] [2019-11-15 21:59:23,417 INFO L791 eck$LassoCheckResult]: Stem: 120#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet2, main_#t~ret3, main_~x~0;main_~x~0 := main_#t~nondet2;havoc main_#t~nondet2; 121#L20 assume !(main_~x~0 < 0); 118#L21 call main_#t~ret3 := g(main_~x~0);< 119#gENTRY ~x := #in~x; 117#L12 assume !(0 == ~x); 115#L15 call #t~ret0 := g(~x - 1);< 122#gENTRY ~x := #in~x; 114#L12 assume 0 == ~x;#res := 1; 116#gFINAL assume true; 123#gEXIT >#22#return; 125#L15-1 [2019-11-15 21:59:23,417 INFO L793 eck$LassoCheckResult]: Loop: 125#L15-1 call #t~ret1 := g(1 + #t~ret0);< 126#gENTRY ~x := #in~x; 129#L12 assume !(0 == ~x); 124#L15 call #t~ret0 := g(~x - 1);< 126#gENTRY ~x := #in~x; 129#L12 assume 0 == ~x;#res := 1; 128#gFINAL assume true; 130#gEXIT >#22#return; 125#L15-1 [2019-11-15 21:59:23,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 21:59:23,418 INFO L82 PathProgramCache]: Analyzing trace with hash -54633169, now seen corresponding path program 1 times [2019-11-15 21:59:23,418 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 21:59:23,418 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146191996] [2019-11-15 21:59:23,418 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:59:23,418 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:59:23,419 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 21:59:23,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-15 21:59:23,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-15 21:59:23,444 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-15 21:59:23,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 21:59:23,445 INFO L82 PathProgramCache]: Analyzing trace with hash -243608724, now seen corresponding path program 1 times [2019-11-15 21:59:23,445 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 21:59:23,445 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247267599] [2019-11-15 21:59:23,445 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:59:23,446 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:59:23,446 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 21:59:23,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-15 21:59:23,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-15 21:59:23,454 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-15 21:59:23,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 21:59:23,454 INFO L82 PathProgramCache]: Analyzing trace with hash -791141734, now seen corresponding path program 1 times [2019-11-15 21:59:23,455 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 21:59:23,458 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720836773] [2019-11-15 21:59:23,458 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:59:23,458 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:59:23,458 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 21:59:23,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 21:59:23,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 21:59:23,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 21:59:23,576 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-15 21:59:23,576 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720836773] [2019-11-15 21:59:23,577 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023281804] [2019-11-15 21:59:23,577 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8adef5d6-17cd-4dca-b8ed-f2a3941aedbd/bin/uautomizer/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 21:59:23,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 21:59:23,639 INFO L256 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-15 21:59:23,641 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 21:59:23,681 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-15 21:59:23,682 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 21:59:23,682 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2019-11-15 21:59:23,682 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000794418] [2019-11-15 21:59:23,812 INFO L210 LassoAnalysis]: Preferences: [2019-11-15 21:59:23,812 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2019-11-15 21:59:23,812 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-15 21:59:23,812 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2019-11-15 21:59:23,812 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2019-11-15 21:59:23,812 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-15 21:59:23,813 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-15 21:59:23,813 INFO L130 ssoRankerPreferences]: Path of dumped script: [2019-11-15 21:59:23,813 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_2b.c_Iteration2_Loop [2019-11-15 21:59:23,813 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-15 21:59:23,813 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-15 21:59:23,814 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-15 21:59:23,827 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-15 21:59:23,830 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-15 21:59:23,873 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-15 21:59:23,873 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8adef5d6-17cd-4dca-b8ed-f2a3941aedbd/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) [2019-11-15 21:59:23,883 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-15 21:59:23,883 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 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8adef5d6-17cd-4dca-b8ed-f2a3941aedbd/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) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-15 21:59:23,895 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-15 21:59:23,895 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-15 21:59:25,755 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-15 21:59:25,757 INFO L210 LassoAnalysis]: Preferences: [2019-11-15 21:59:25,757 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2019-11-15 21:59:25,757 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-15 21:59:25,757 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2019-11-15 21:59:25,757 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2019-11-15 21:59:25,757 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-15 21:59:25,757 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-15 21:59:25,758 INFO L130 ssoRankerPreferences]: Path of dumped script: [2019-11-15 21:59:25,758 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_2b.c_Iteration2_Loop [2019-11-15 21:59:25,758 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-15 21:59:25,758 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-15 21:59:25,759 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-15 21:59:25,767 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-15 21:59:25,779 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-15 21:59:25,865 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-15 21:59:25,865 INFO L489 LassoAnalysis]: Using template 'affine'. [2019-11-15 21:59:25,865 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 [2019-11-15 21:59:25,866 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-11-15 21:59:25,866 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-15 21:59:25,866 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-15 21:59:25,866 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-15 21:59:25,866 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-15 21:59:25,867 INFO L400 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-15 21:59:25,867 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-15 21:59:25,868 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-11-15 21:59:25,868 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 [2019-11-15 21:59:25,869 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-11-15 21:59:25,869 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-15 21:59:25,869 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-15 21:59:25,869 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-15 21:59:25,870 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-15 21:59:25,871 INFO L400 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-15 21:59:25,871 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-15 21:59:25,884 INFO L419 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-15 21:59:25,891 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-15 21:59:25,893 INFO L444 ModelExtractionUtils]: 2 out of 5 variables were initially zero. Simplification set additionally 0 variables to zero. [2019-11-15 21:59:25,894 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-15 21:59:25,894 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-15 21:59:25,895 INFO L510 LassoAnalysis]: Proved termination. [2019-11-15 21:59:25,895 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(g_#t~ret0) = -2*g_#t~ret0 + 1 Supporting invariants [] [2019-11-15 21:59:25,895 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-15 21:59:25,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 21:59:25,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 21:59:25,943 INFO L256 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-15 21:59:25,944 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 21:59:25,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 21:59:25,983 INFO L256 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-15 21:59:25,984 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 21:59:26,116 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 21:59:26,116 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 6 loop predicates [2019-11-15 21:59:26,117 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 17 states and 21 transitions. cyclomatic complexity: 6 Second operand 8 states. [2019-11-15 21:59:38,721 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 17 states and 21 transitions. cyclomatic complexity: 6. Second operand 8 states. Result 82 states and 120 transitions. Complement of second has 31 states. [2019-11-15 21:59:38,722 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 10 states 2 stem states 7 non-accepting loop states 1 accepting loop states [2019-11-15 21:59:38,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-11-15 21:59:38,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 36 transitions. [2019-11-15 21:59:38,724 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 36 transitions. Stem has 10 letters. Loop has 8 letters. [2019-11-15 21:59:38,725 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-15 21:59:38,725 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 36 transitions. Stem has 18 letters. Loop has 8 letters. [2019-11-15 21:59:38,725 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-15 21:59:38,725 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 36 transitions. Stem has 10 letters. Loop has 16 letters. [2019-11-15 21:59:38,726 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-15 21:59:38,726 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 82 states and 120 transitions. [2019-11-15 21:59:38,737 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 8 [2019-11-15 21:59:38,747 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 82 states to 58 states and 81 transitions. [2019-11-15 21:59:38,747 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 44 [2019-11-15 21:59:38,749 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 45 [2019-11-15 21:59:38,749 INFO L73 IsDeterministic]: Start isDeterministic. Operand 58 states and 81 transitions. [2019-11-15 21:59:38,750 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-15 21:59:38,751 INFO L688 BuchiCegarLoop]: Abstraction has 58 states and 81 transitions. [2019-11-15 21:59:38,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states and 81 transitions. [2019-11-15 21:59:38,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 52. [2019-11-15 21:59:38,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-11-15 21:59:38,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 71 transitions. [2019-11-15 21:59:38,769 INFO L711 BuchiCegarLoop]: Abstraction has 52 states and 71 transitions. [2019-11-15 21:59:38,770 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 21:59:38,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-15 21:59:38,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-11-15 21:59:38,774 INFO L87 Difference]: Start difference. First operand 52 states and 71 transitions. Second operand 10 states. [2019-11-15 21:59:38,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 21:59:38,869 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2019-11-15 21:59:38,870 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-15 21:59:38,870 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 39 states and 44 transitions. [2019-11-15 21:59:38,871 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2019-11-15 21:59:38,872 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 39 states to 30 states and 34 transitions. [2019-11-15 21:59:38,872 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 25 [2019-11-15 21:59:38,873 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 25 [2019-11-15 21:59:38,873 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 34 transitions. [2019-11-15 21:59:38,873 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-15 21:59:38,873 INFO L688 BuchiCegarLoop]: Abstraction has 30 states and 34 transitions. [2019-11-15 21:59:38,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states and 34 transitions. [2019-11-15 21:59:38,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 25. [2019-11-15 21:59:38,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-11-15 21:59:38,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2019-11-15 21:59:38,878 INFO L711 BuchiCegarLoop]: Abstraction has 25 states and 27 transitions. [2019-11-15 21:59:38,878 INFO L591 BuchiCegarLoop]: Abstraction has 25 states and 27 transitions. [2019-11-15 21:59:38,878 INFO L424 BuchiCegarLoop]: ======== Iteration 3============ [2019-11-15 21:59:38,878 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 25 states and 27 transitions. [2019-11-15 21:59:38,879 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2019-11-15 21:59:38,879 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-15 21:59:38,879 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-15 21:59:38,879 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 21:59:38,880 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-11-15 21:59:38,880 INFO L791 eck$LassoCheckResult]: Stem: 502#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet2, main_#t~ret3, main_~x~0;main_~x~0 := main_#t~nondet2;havoc main_#t~nondet2; 503#L20 assume !(main_~x~0 < 0); 495#L21 call main_#t~ret3 := g(main_~x~0);< 496#gENTRY ~x := #in~x; 500#L12 assume !(0 == ~x); 501#L15 call #t~ret0 := g(~x - 1);< 507#gENTRY ~x := #in~x; 508#L12 assume 0 == ~x;#res := 1; 509#gFINAL assume true; 510#gEXIT >#22#return; 505#L15-1 call #t~ret1 := g(1 + #t~ret0);< 504#gENTRY ~x := #in~x; 506#L12 assume !(0 == ~x); 514#L15 call #t~ret0 := g(~x - 1);< 518#gENTRY ~x := #in~x; 517#L12 assume !(0 == ~x); 513#L15 [2019-11-15 21:59:38,880 INFO L793 eck$LassoCheckResult]: Loop: 513#L15 call #t~ret0 := g(~x - 1);< 511#gENTRY ~x := #in~x; 515#L12 assume !(0 == ~x); 513#L15 [2019-11-15 21:59:38,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 21:59:38,880 INFO L82 PathProgramCache]: Analyzing trace with hash 2001409165, now seen corresponding path program 2 times [2019-11-15 21:59:38,880 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 21:59:38,881 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105723846] [2019-11-15 21:59:38,881 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:59:38,881 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:59:38,881 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 21:59:38,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-15 21:59:38,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-15 21:59:38,891 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-15 21:59:38,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 21:59:38,892 INFO L82 PathProgramCache]: Analyzing trace with hash 49976, now seen corresponding path program 2 times [2019-11-15 21:59:38,892 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 21:59:38,892 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176732189] [2019-11-15 21:59:38,892 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:59:38,892 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:59:38,892 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 21:59:38,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-15 21:59:38,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-15 21:59:38,896 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-15 21:59:38,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 21:59:38,897 INFO L82 PathProgramCache]: Analyzing trace with hash 1244451628, now seen corresponding path program 3 times [2019-11-15 21:59:38,897 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 21:59:38,897 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439714702] [2019-11-15 21:59:38,897 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:59:38,897 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:59:38,898 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 21:59:38,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 21:59:38,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 21:59:39,018 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-15 21:59:39,018 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439714702] [2019-11-15 21:59:39,019 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135652692] [2019-11-15 21:59:39,019 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8adef5d6-17cd-4dca-b8ed-f2a3941aedbd/bin/uautomizer/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-15 21:59:39,067 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-11-15 21:59:39,067 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-15 21:59:39,068 INFO L256 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-15 21:59:39,071 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 21:59:39,097 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-15 21:59:39,097 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-15 21:59:39,098 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2019-11-15 21:59:39,098 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330982948] [2019-11-15 21:59:39,140 INFO L210 LassoAnalysis]: Preferences: [2019-11-15 21:59:39,140 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2019-11-15 21:59:39,140 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-15 21:59:39,140 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2019-11-15 21:59:39,140 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2019-11-15 21:59:39,140 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-15 21:59:39,140 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-15 21:59:39,140 INFO L130 ssoRankerPreferences]: Path of dumped script: [2019-11-15 21:59:39,140 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_2b.c_Iteration3_Loop [2019-11-15 21:59:39,140 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-15 21:59:39,140 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-15 21:59:39,141 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-15 21:59:39,150 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-15 21:59:39,152 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-15 21:59:39,153 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-15 21:59:39,194 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-15 21:59:39,195 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8adef5d6-17cd-4dca-b8ed-f2a3941aedbd/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) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-15 21:59:39,201 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-15 21:59:39,201 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8adef5d6-17cd-4dca-b8ed-f2a3941aedbd/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) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-15 21:59:39,231 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-15 21:59:39,231 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-15 21:59:39,770 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-15 21:59:39,771 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#in~x=-7, g_~x=-6} Honda state: {g_#in~x=-7, g_~x=-6} Generalized eigenvectors: [{g_#in~x=1, g_~x=0}, {g_#in~x=-1, g_~x=-1}, {g_#in~x=0, g_~x=0}] Lambdas: [0, 1, 3] Nus: [0, 1] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8adef5d6-17cd-4dca-b8ed-f2a3941aedbd/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) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-15 21:59:39,779 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-15 21:59:39,779 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-15 21:59:39,782 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-15 21:59:39,782 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#t~ret1=0} Honda state: {g_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8adef5d6-17cd-4dca-b8ed-f2a3941aedbd/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) [2019-11-15 21:59:39,791 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-15 21:59:39,791 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-15 21:59:39,794 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-15 21:59:39,794 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#res=0} Honda state: {g_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8adef5d6-17cd-4dca-b8ed-f2a3941aedbd/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) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-15 21:59:39,801 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-15 21:59:39,801 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-15 21:59:39,804 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-15 21:59:39,804 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {g_#t~ret0=0} Honda state: {g_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2019-11-15 21:59:39,805 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 21:59:39,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-15 21:59:39,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2019-11-15 21:59:39,805 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. cyclomatic complexity: 4 Second operand 10 states. [2019-11-15 21:59:39,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 21:59:39,960 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2019-11-15 21:59:39,960 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-15 21:59:39,961 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 27 states and 28 transitions. [2019-11-15 21:59:39,961 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2019-11-15 21:59:39,962 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 27 states to 27 states and 28 transitions. [2019-11-15 21:59:39,962 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 24 [2019-11-15 21:59:39,962 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 24 [2019-11-15 21:59:39,962 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 28 transitions. [2019-11-15 21:59:39,963 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-15 21:59:39,963 INFO L688 BuchiCegarLoop]: Abstraction has 27 states and 28 transitions. [2019-11-15 21:59:39,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states and 28 transitions. [2019-11-15 21:59:39,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 21. [2019-11-15 21:59:39,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-15 21:59:39,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2019-11-15 21:59:39,965 INFO L711 BuchiCegarLoop]: Abstraction has 21 states and 22 transitions. [2019-11-15 21:59:39,965 INFO L591 BuchiCegarLoop]: Abstraction has 21 states and 22 transitions. [2019-11-15 21:59:39,965 INFO L424 BuchiCegarLoop]: ======== Iteration 4============ [2019-11-15 21:59:39,965 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 21 states and 22 transitions. [2019-11-15 21:59:39,966 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2019-11-15 21:59:39,966 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-15 21:59:39,966 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-15 21:59:39,966 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-15 21:59:39,966 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [3, 2, 2, 1, 1, 1, 1] [2019-11-15 21:59:39,967 INFO L791 eck$LassoCheckResult]: Stem: 639#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet2, main_#t~ret3, main_~x~0;main_~x~0 := main_#t~nondet2;havoc main_#t~nondet2; 640#L20 assume !(main_~x~0 < 0); 632#L21 call main_#t~ret3 := g(main_~x~0);< 633#gENTRY ~x := #in~x; 637#L12 assume !(0 == ~x); 638#L15 call #t~ret0 := g(~x - 1);< 642#gENTRY ~x := #in~x; 643#L12 assume 0 == ~x;#res := 1; 650#gFINAL assume true; 648#gEXIT >#22#return; 635#L15-1 [2019-11-15 21:59:39,967 INFO L793 eck$LassoCheckResult]: Loop: 635#L15-1 call #t~ret1 := g(1 + #t~ret0);< 641#gENTRY ~x := #in~x; 634#L12 assume !(0 == ~x); 636#L15 call #t~ret0 := g(~x - 1);< 647#gENTRY ~x := #in~x; 651#L12 assume !(0 == ~x); 645#L15 call #t~ret0 := g(~x - 1);< 649#gENTRY ~x := #in~x; 652#L12 assume 0 == ~x;#res := 1; 644#gFINAL assume true; 646#gEXIT >#22#return; 635#L15-1 [2019-11-15 21:59:39,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 21:59:39,967 INFO L82 PathProgramCache]: Analyzing trace with hash -54633169, now seen corresponding path program 2 times [2019-11-15 21:59:39,967 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 21:59:39,967 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817505547] [2019-11-15 21:59:39,967 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:59:39,968 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:59:39,968 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 21:59:39,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-15 21:59:39,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-15 21:59:39,975 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-15 21:59:39,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 21:59:39,975 INFO L82 PathProgramCache]: Analyzing trace with hash 1187216231, now seen corresponding path program 2 times [2019-11-15 21:59:39,975 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 21:59:39,976 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879660854] [2019-11-15 21:59:39,976 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:59:39,976 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:59:39,976 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 21:59:39,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-15 21:59:39,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-15 21:59:39,983 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-15 21:59:39,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 21:59:39,984 INFO L82 PathProgramCache]: Analyzing trace with hash 1917105529, now seen corresponding path program 4 times [2019-11-15 21:59:39,984 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 21:59:39,984 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873574139] [2019-11-15 21:59:39,984 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:59:39,985 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 21:59:39,985 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 21:59:39,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-15 21:59:39,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-15 21:59:39,995 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-15 21:59:40,276 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 15.11 09:59:40 BoogieIcfgContainer [2019-11-15 21:59:40,276 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2019-11-15 21:59:40,277 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-15 21:59:40,278 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-15 21:59:40,278 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-15 21:59:40,278 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 09:59:21" (3/4) ... [2019-11-15 21:59:40,281 INFO L134 WitnessPrinter]: Generating witness for non-termination counterexample [2019-11-15 21:59:40,335 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_8adef5d6-17cd-4dca-b8ed-f2a3941aedbd/bin/uautomizer/witness.graphml [2019-11-15 21:59:40,335 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-15 21:59:40,338 INFO L168 Benchmark]: Toolchain (without parser) took 19196.47 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 143.7 MB). Free memory was 947.4 MB in the beginning and 908.8 MB in the end (delta: 38.6 MB). Peak memory consumption was 182.2 MB. Max. memory is 11.5 GB. [2019-11-15 21:59:40,342 INFO L168 Benchmark]: CDTParser took 0.18 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. [2019-11-15 21:59:40,342 INFO L168 Benchmark]: CACSL2BoogieTranslator took 272.60 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 143.7 MB). Free memory was 947.4 MB in the beginning and 1.1 GB in the end (delta: -191.0 MB). Peak memory consumption was 24.5 MB. Max. memory is 11.5 GB. [2019-11-15 21:59:40,343 INFO L168 Benchmark]: Boogie Procedure Inliner took 30.22 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. [2019-11-15 21:59:40,343 INFO L168 Benchmark]: Boogie Preprocessor took 15.59 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. [2019-11-15 21:59:40,343 INFO L168 Benchmark]: RCFGBuilder took 220.88 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: 17.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 11.5 GB. [2019-11-15 21:59:40,344 INFO L168 Benchmark]: BuchiAutomizer took 18590.84 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 915.2 MB in the end (delta: 206.3 MB). Peak memory consumption was 206.3 MB. Max. memory is 11.5 GB. [2019-11-15 21:59:40,344 INFO L168 Benchmark]: Witness Printer took 58.17 ms. Allocated memory is still 1.2 GB. Free memory was 915.2 MB in the beginning and 908.8 MB in the end (delta: 6.3 MB). Peak memory consumption was 6.3 MB. Max. memory is 11.5 GB. [2019-11-15 21:59:40,346 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 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 272.60 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 143.7 MB). Free memory was 947.4 MB in the beginning and 1.1 GB in the end (delta: -191.0 MB). Peak memory consumption was 24.5 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 30.22 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 15.59 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 220.88 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: 17.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 18590.84 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 915.2 MB in the end (delta: 206.3 MB). Peak memory consumption was 206.3 MB. Max. memory is 11.5 GB. * Witness Printer took 58.17 ms. Allocated memory is still 1.2 GB. Free memory was 915.2 MB in the beginning and 908.8 MB in the end (delta: 6.3 MB). Peak memory consumption was 6.3 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 4 terminating modules (2 trivial, 2 deterministic, 0 nondeterministic) and one nonterminating remainder module.One deterministic module has affine ranking function \old(x) and consists of 5 locations. One deterministic module has affine ranking function -2 * aux-g(x - 1)-aux + 1 and consists of 10 locations. 2 modules have a trivial ranking function, the largest among these consists of 10 locations. The remainder module has 21 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 18.4s and 4 iterations. TraceHistogramMax:4. Analysis of lassos took 4.8s. Construction of modules took 12.4s. Büchi inclusion checks took 1.0s. Highest rank in rank-based complementation 3. Minimization of det autom 0. Minimization of nondet autom 4. Automata minimization 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 19 StatesRemovedByMinimization, 4 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 25 states and ocurred in iteration 2. Nontrivial modules had stage [2, 0, 0, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/2 HoareTripleCheckerStatistics: 46 SDtfs, 70 SDslu, 99 SDs, 0 SdLazy, 234 SolverSat, 48 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 12.4s Time LassoAnalysisResults: nont1 unkn0 SFLI0 SFLT0 conc1 concLT1 SILN0 SILU0 SILI0 SILT0 lasso1 LassoPreprocessingBenchmarks: Lassos: inital13 mio100 ax100 hnf100 lsp100 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq194 hnf92 smp100 dnf139 smp100 tf104 neg96 sie107 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: sat Degree: 0 Time: 196ms VariablesStem: 1 VariablesLoop: 2 DisjunctsStem: 1 DisjunctsLoop: 2 SupportingInvariants: 4 MotzkinApplications: 16 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 13 LassoNonterminationAnalysisSatUnbounded: 2 LassoNonterminationAnalysisUnsat: 2 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 2.7s - TerminationAnalysisResult: Nontermination possible Buchi Automizer proved that your program is nonterminating for some inputs - FixpointNonTerminationResult [Line: 15]: Nontermination argument in form of an infinite program execution. Nontermination argument in form of an infinite execution State at position 0 is {} State at position 1 is {org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@75150603=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@5abdb1f5=1, \result=0, \result=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@5d4c4f57=0, \old(x)=1, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@fae61f2=0, x=0, x=1, NULL=0} - StatisticsResult: NonterminationArgumentStatistics Fixpoint - NonterminatingLassoResult [Line: 15]: Nonterminating execution Found a nonterminating execution for the following lasso shaped sequence of statements. Stem: [L19] int x = __VERIFIER_nondet_int(); [L20] COND FALSE !(x < 0) [L21] CALL g(x) [L12] COND FALSE !(x == 0) [L15] CALL g(x - 1) [L12] COND TRUE x == 0 [L13] return 1; [L15] RET g(x - 1) Loop: [L15] CALL g(g(x - 1) + 1) [L12] COND FALSE !(x == 0) [L15] CALL g(x - 1) [L12] COND FALSE !(x == 0) [L15] CALL g(x - 1) [L12] COND TRUE x == 0 [L13] return 1; [L15] RET g(x - 1) End of lasso representation. RESULT: Ultimate proved your program to be incorrect! Received shutdown request...