./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/termination-crafted/NestedRecursion_1c_true-no-overflow_true-termination_true-valid-memsafety.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version aa418289 Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_f7bb33fd-2acd-4e9e-b951-9edf7cda5de1/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_f7bb33fd-2acd-4e9e-b951-9edf7cda5de1/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_f7bb33fd-2acd-4e9e-b951-9edf7cda5de1/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_f7bb33fd-2acd-4e9e-b951-9edf7cda5de1/bin-2019/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-crafted/NestedRecursion_1c_true-no-overflow_true-termination_true-valid-memsafety.c -s /tmp/vcloud-vcloud-master/worker/working_dir_f7bb33fd-2acd-4e9e-b951-9edf7cda5de1/bin-2019/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_f7bb33fd-2acd-4e9e-b951-9edf7cda5de1/bin-2019/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(F end) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 1b5ce1e17bce3e34a2c882b1080bdbc1a62cb801 ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-aa41828 [2018-11-23 07:35:46,762 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-23 07:35:46,764 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-23 07:35:46,771 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-23 07:35:46,771 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-23 07:35:46,772 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-23 07:35:46,772 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-23 07:35:46,774 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-23 07:35:46,775 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-23 07:35:46,775 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-23 07:35:46,776 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-23 07:35:46,776 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-23 07:35:46,777 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-23 07:35:46,777 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-23 07:35:46,778 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-23 07:35:46,779 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-23 07:35:46,779 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-23 07:35:46,780 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-23 07:35:46,781 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-23 07:35:46,782 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-23 07:35:46,783 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-23 07:35:46,784 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-23 07:35:46,785 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-23 07:35:46,786 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-23 07:35:46,786 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-23 07:35:46,786 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-23 07:35:46,787 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-23 07:35:46,788 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-23 07:35:46,788 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-23 07:35:46,789 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-23 07:35:46,789 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-23 07:35:46,790 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-23 07:35:46,790 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-23 07:35:46,790 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-23 07:35:46,790 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-23 07:35:46,791 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-23 07:35:46,791 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_f7bb33fd-2acd-4e9e-b951-9edf7cda5de1/bin-2019/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf [2018-11-23 07:35:46,801 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-23 07:35:46,801 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-23 07:35:46,802 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-23 07:35:46,802 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-23 07:35:46,802 INFO L133 SettingsManager]: * Use SBE=true [2018-11-23 07:35:46,802 INFO L131 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2018-11-23 07:35:46,802 INFO L133 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2018-11-23 07:35:46,803 INFO L133 SettingsManager]: * Use old map elimination=false [2018-11-23 07:35:46,803 INFO L133 SettingsManager]: * Use external solver (rank synthesis)=false [2018-11-23 07:35:46,803 INFO L133 SettingsManager]: * Use only trivial implications for array writes=true [2018-11-23 07:35:46,803 INFO L133 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2018-11-23 07:35:46,803 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-23 07:35:46,803 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-11-23 07:35:46,803 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-23 07:35:46,803 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-23 07:35:46,804 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2018-11-23 07:35:46,804 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2018-11-23 07:35:46,804 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2018-11-23 07:35:46,804 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-23 07:35:46,804 INFO L133 SettingsManager]: * Assume nondeterminstic values are in range=false [2018-11-23 07:35:46,804 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-23 07:35:46,804 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2018-11-23 07:35:46,804 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-23 07:35:46,805 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-23 07:35:46,805 INFO L133 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2018-11-23 07:35:46,805 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-23 07:35:46,805 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-23 07:35:46,805 INFO L133 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2018-11-23 07:35:46,806 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-11-23 07:35:46,806 INFO L133 SettingsManager]: * TransformationType=MODULO_NEIGHBOR Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/working_dir_f7bb33fd-2acd-4e9e-b951-9edf7cda5de1/bin-2019/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1b5ce1e17bce3e34a2c882b1080bdbc1a62cb801 [2018-11-23 07:35:46,829 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-23 07:35:46,837 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-23 07:35:46,839 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-23 07:35:46,840 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-23 07:35:46,840 INFO L276 PluginConnector]: CDTParser initialized [2018-11-23 07:35:46,841 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_f7bb33fd-2acd-4e9e-b951-9edf7cda5de1/bin-2019/uautomizer/../../sv-benchmarks/c/termination-crafted/NestedRecursion_1c_true-no-overflow_true-termination_true-valid-memsafety.c [2018-11-23 07:35:46,877 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_f7bb33fd-2acd-4e9e-b951-9edf7cda5de1/bin-2019/uautomizer/data/60a7eb18b/270d2bc92bef42e7af9b877f80cdec2b/FLAG0a2c17b22 [2018-11-23 07:35:47,187 INFO L307 CDTParser]: Found 1 translation units. [2018-11-23 07:35:47,188 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_f7bb33fd-2acd-4e9e-b951-9edf7cda5de1/sv-benchmarks/c/termination-crafted/NestedRecursion_1c_true-no-overflow_true-termination_true-valid-memsafety.c [2018-11-23 07:35:47,192 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_f7bb33fd-2acd-4e9e-b951-9edf7cda5de1/bin-2019/uautomizer/data/60a7eb18b/270d2bc92bef42e7af9b877f80cdec2b/FLAG0a2c17b22 [2018-11-23 07:35:47,202 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_f7bb33fd-2acd-4e9e-b951-9edf7cda5de1/bin-2019/uautomizer/data/60a7eb18b/270d2bc92bef42e7af9b877f80cdec2b [2018-11-23 07:35:47,204 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-23 07:35:47,205 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-23 07:35:47,206 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-23 07:35:47,206 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-23 07:35:47,209 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-23 07:35:47,209 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 07:35:47" (1/1) ... [2018-11-23 07:35:47,211 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12858536 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 07:35:47, skipping insertion in model container [2018-11-23 07:35:47,211 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 07:35:47" (1/1) ... [2018-11-23 07:35:47,218 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-23 07:35:47,228 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-23 07:35:47,335 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-23 07:35:47,338 INFO L191 MainTranslator]: Completed pre-run [2018-11-23 07:35:47,347 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-23 07:35:47,356 INFO L195 MainTranslator]: Completed translation [2018-11-23 07:35:47,356 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 07:35:47 WrapperNode [2018-11-23 07:35:47,356 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-23 07:35:47,357 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-23 07:35:47,357 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-23 07:35:47,357 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-23 07:35:47,362 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 07:35:47" (1/1) ... [2018-11-23 07:35:47,365 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 07:35:47" (1/1) ... [2018-11-23 07:35:47,374 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-23 07:35:47,374 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-23 07:35:47,374 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-23 07:35:47,374 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-23 07:35:47,379 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 07:35:47" (1/1) ... [2018-11-23 07:35:47,379 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 07:35:47" (1/1) ... [2018-11-23 07:35:47,380 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 07:35:47" (1/1) ... [2018-11-23 07:35:47,380 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 07:35:47" (1/1) ... [2018-11-23 07:35:47,381 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 07:35:47" (1/1) ... [2018-11-23 07:35:47,382 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 07:35:47" (1/1) ... [2018-11-23 07:35:47,382 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 07:35:47" (1/1) ... [2018-11-23 07:35:47,383 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-23 07:35:47,383 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-23 07:35:47,383 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-23 07:35:47,383 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-23 07:35:47,384 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 07:35:47" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f7bb33fd-2acd-4e9e-b951-9edf7cda5de1/bin-2019/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 07:35:47,451 INFO L130 BoogieDeclarations]: Found specification of procedure rec1 [2018-11-23 07:35:47,452 INFO L138 BoogieDeclarations]: Found implementation of procedure rec1 [2018-11-23 07:35:47,452 INFO L130 BoogieDeclarations]: Found specification of procedure rec2 [2018-11-23 07:35:47,452 INFO L138 BoogieDeclarations]: Found implementation of procedure rec2 [2018-11-23 07:35:47,452 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-23 07:35:47,452 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-23 07:35:47,549 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-23 07:35:47,549 INFO L280 CfgBuilder]: Removed 4 assue(true) statements. [2018-11-23 07:35:47,550 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 07:35:47 BoogieIcfgContainer [2018-11-23 07:35:47,550 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-23 07:35:47,550 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2018-11-23 07:35:47,550 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2018-11-23 07:35:47,553 INFO L276 PluginConnector]: BuchiAutomizer initialized [2018-11-23 07:35:47,554 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-11-23 07:35:47,554 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 23.11 07:35:47" (1/3) ... [2018-11-23 07:35:47,555 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@583d1dc3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 23.11 07:35:47, skipping insertion in model container [2018-11-23 07:35:47,555 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-11-23 07:35:47,555 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 07:35:47" (2/3) ... [2018-11-23 07:35:47,555 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@583d1dc3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 23.11 07:35:47, skipping insertion in model container [2018-11-23 07:35:47,555 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-11-23 07:35:47,555 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 07:35:47" (3/3) ... [2018-11-23 07:35:47,557 INFO L375 chiAutomizerObserver]: Analyzing ICFG NestedRecursion_1c_true-no-overflow_true-termination_true-valid-memsafety.c [2018-11-23 07:35:47,602 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-23 07:35:47,602 INFO L374 BuchiCegarLoop]: Interprodecural is true [2018-11-23 07:35:47,602 INFO L375 BuchiCegarLoop]: Hoare is false [2018-11-23 07:35:47,603 INFO L376 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2018-11-23 07:35:47,603 INFO L377 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-23 07:35:47,603 INFO L378 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-23 07:35:47,603 INFO L379 BuchiCegarLoop]: Difference is false [2018-11-23 07:35:47,603 INFO L380 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-23 07:35:47,603 INFO L383 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2018-11-23 07:35:47,615 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 21 states. [2018-11-23 07:35:47,636 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 8 [2018-11-23 07:35:47,636 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-23 07:35:47,636 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-23 07:35:47,643 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2018-11-23 07:35:47,643 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2018-11-23 07:35:47,643 INFO L442 BuchiCegarLoop]: ======== Iteration 1============ [2018-11-23 07:35:47,643 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 21 states. [2018-11-23 07:35:47,645 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 8 [2018-11-23 07:35:47,645 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-23 07:35:47,646 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-23 07:35:47,646 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2018-11-23 07:35:47,646 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2018-11-23 07:35:47,652 INFO L794 eck$LassoCheckResult]: Stem: 13#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 22#L25true call main_#t~ret6 := rec2(main_~x~0);< 3#rec2ENTRYtrue [2018-11-23 07:35:47,653 INFO L796 eck$LassoCheckResult]: Loop: 3#rec2ENTRYtrue ~j := #in~j; 20#L18true assume !(~j <= 0); 18#L20true call #t~ret3 := rec2(~j - 1);< 3#rec2ENTRYtrue [2018-11-23 07:35:47,658 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 07:35:47,659 INFO L82 PathProgramCache]: Analyzing trace with hash 1617, now seen corresponding path program 1 times [2018-11-23 07:35:47,660 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 07:35:47,661 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 07:35:47,693 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 07:35:47,693 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 07:35:47,693 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 07:35:47,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 07:35:47,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 07:35:47,719 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 07:35:47,719 INFO L82 PathProgramCache]: Analyzing trace with hash 39867, now seen corresponding path program 1 times [2018-11-23 07:35:47,719 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 07:35:47,719 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 07:35:47,720 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 07:35:47,720 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 07:35:47,720 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 07:35:47,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 07:35:47,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 07:35:47,732 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 07:35:47,732 INFO L82 PathProgramCache]: Analyzing trace with hash 48182123, now seen corresponding path program 1 times [2018-11-23 07:35:47,732 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 07:35:47,732 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 07:35:47,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 07:35:47,733 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 07:35:47,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 07:35:47,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 07:35:47,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 07:35:47,795 INFO L216 LassoAnalysis]: Preferences: [2018-11-23 07:35:47,796 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-23 07:35:47,796 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-23 07:35:47,796 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-23 07:35:47,796 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-23 07:35:47,796 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 07:35:47,796 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-23 07:35:47,796 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-23 07:35:47,796 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1c_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration1_Loop [2018-11-23 07:35:47,796 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-23 07:35:47,796 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-23 07:35:47,808 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 07:35:47,812 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 07:35:47,814 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 07:35:47,816 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 07:35:47,821 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 07:35:47,868 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-23 07:35:47,868 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f7bb33fd-2acd-4e9e-b951-9edf7cda5de1/bin-2019/uautomizer/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 07:35:47,879 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 07:35:47,879 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 07:35:47,885 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-23 07:35:47,886 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec2_#res=0} Honda state: {rec2_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f7bb33fd-2acd-4e9e-b951-9edf7cda5de1/bin-2019/uautomizer/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 07:35:47,900 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 07:35:47,900 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 07:35:47,902 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-23 07:35:47,903 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec2_#t~ret3=0} Honda state: {rec2_#t~ret3=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f7bb33fd-2acd-4e9e-b951-9edf7cda5de1/bin-2019/uautomizer/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 07:35:47,917 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 07:35:47,917 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 07:35:47,919 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-23 07:35:47,920 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec2_#t~ret4=0} Honda state: {rec2_#t~ret4=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f7bb33fd-2acd-4e9e-b951-9edf7cda5de1/bin-2019/uautomizer/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 07:35:47,934 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 07:35:47,935 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f7bb33fd-2acd-4e9e-b951-9edf7cda5de1/bin-2019/uautomizer/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 07:35:47,951 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-23 07:35:47,951 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 07:35:47,967 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-23 07:35:47,968 INFO L216 LassoAnalysis]: Preferences: [2018-11-23 07:35:47,968 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-23 07:35:47,968 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-23 07:35:47,968 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-23 07:35:47,969 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-23 07:35:47,969 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 07:35:47,969 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-23 07:35:47,969 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-23 07:35:47,969 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1c_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration1_Loop [2018-11-23 07:35:47,969 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-23 07:35:47,969 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-23 07:35:47,970 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 07:35:47,972 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 07:35:47,976 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 07:35:47,979 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 07:35:47,983 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 07:35:48,023 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-23 07:35:48,026 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-23 07:35:48,027 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-23 07:35:48,028 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 07:35:48,029 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 07:35:48,029 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 07:35:48,029 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 07:35:48,029 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 07:35:48,031 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 07:35:48,031 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 07:35:48,034 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-23 07:35:48,035 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-23 07:35:48,035 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 07:35:48,035 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 07:35:48,035 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 07:35:48,035 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 07:35:48,036 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 07:35:48,036 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 07:35:48,036 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 07:35:48,042 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-23 07:35:48,045 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-11-23 07:35:48,045 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-11-23 07:35:48,047 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-23 07:35:48,047 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-23 07:35:48,047 INFO L518 LassoAnalysis]: Proved termination. [2018-11-23 07:35:48,047 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec2_#in~j) = 1*rec2_#in~j Supporting invariants [] [2018-11-23 07:35:48,048 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-23 07:35:48,067 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 07:35:48,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 07:35:48,080 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 07:35:48,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 07:35:48,093 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 07:35:48,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 07:35:48,140 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2018-11-23 07:35:48,141 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 21 states. Second operand 4 states. [2018-11-23 07:35:48,224 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 21 states.. Second operand 4 states. Result 36 states and 44 transitions. Complement of second has 12 states. [2018-11-23 07:35:48,225 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2018-11-23 07:35:48,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2018-11-23 07:35:48,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 7 transitions. [2018-11-23 07:35:48,228 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 7 transitions. Stem has 2 letters. Loop has 3 letters. [2018-11-23 07:35:48,228 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 07:35:48,228 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 7 transitions. Stem has 5 letters. Loop has 3 letters. [2018-11-23 07:35:48,228 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 07:35:48,228 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 7 transitions. Stem has 2 letters. Loop has 6 letters. [2018-11-23 07:35:48,229 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 07:35:48,229 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 36 states and 44 transitions. [2018-11-23 07:35:48,235 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2018-11-23 07:35:48,240 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 36 states to 23 states and 30 transitions. [2018-11-23 07:35:48,241 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 17 [2018-11-23 07:35:48,242 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 18 [2018-11-23 07:35:48,242 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 30 transitions. [2018-11-23 07:35:48,244 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-23 07:35:48,244 INFO L705 BuchiCegarLoop]: Abstraction has 23 states and 30 transitions. [2018-11-23 07:35:48,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states and 30 transitions. [2018-11-23 07:35:48,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 19. [2018-11-23 07:35:48,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-11-23 07:35:48,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2018-11-23 07:35:48,264 INFO L728 BuchiCegarLoop]: Abstraction has 19 states and 24 transitions. [2018-11-23 07:35:48,264 INFO L608 BuchiCegarLoop]: Abstraction has 19 states and 24 transitions. [2018-11-23 07:35:48,264 INFO L442 BuchiCegarLoop]: ======== Iteration 2============ [2018-11-23 07:35:48,264 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 19 states and 24 transitions. [2018-11-23 07:35:48,265 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2018-11-23 07:35:48,265 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-23 07:35:48,265 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-23 07:35:48,265 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 07:35:48,265 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2018-11-23 07:35:48,266 INFO L794 eck$LassoCheckResult]: Stem: 125#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 108#L25 call main_#t~ret6 := rec2(main_~x~0);< 107#rec2ENTRY ~j := #in~j; 109#L18 assume !(~j <= 0); 111#L20 call #t~ret3 := rec2(~j - 1);< 110#rec2ENTRY ~j := #in~j; 112#L18 assume ~j <= 0;#res := 0; 121#rec2FINAL assume true; 122#rec2EXIT >#33#return; 117#L20-1 call #t~ret4 := rec1(#t~ret3);< 113#rec1ENTRY [2018-11-23 07:35:48,266 INFO L796 eck$LassoCheckResult]: Loop: 113#rec1ENTRY ~i := #in~i; 118#L12 assume !(~i <= 0); 114#L14 call #t~ret0 := rec1(~i - 2);< 113#rec1ENTRY [2018-11-23 07:35:48,266 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 07:35:48,266 INFO L82 PathProgramCache]: Analyzing trace with hash -1361947899, now seen corresponding path program 1 times [2018-11-23 07:35:48,266 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 07:35:48,266 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 07:35:48,267 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 07:35:48,267 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 07:35:48,267 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 07:35:48,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 07:35:48,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 07:35:48,275 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 07:35:48,275 INFO L82 PathProgramCache]: Analyzing trace with hash 29941, now seen corresponding path program 1 times [2018-11-23 07:35:48,275 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 07:35:48,275 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 07:35:48,276 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 07:35:48,276 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 07:35:48,276 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 07:35:48,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 07:35:48,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 07:35:48,280 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 07:35:48,280 INFO L82 PathProgramCache]: Analyzing trace with hash 766186353, now seen corresponding path program 1 times [2018-11-23 07:35:48,280 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 07:35:48,280 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 07:35:48,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 07:35:48,281 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 07:35:48,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 07:35:48,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 07:35:48,313 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-23 07:35:48,315 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-23 07:35:48,315 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-23 07:35:48,346 INFO L216 LassoAnalysis]: Preferences: [2018-11-23 07:35:48,346 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-23 07:35:48,346 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-23 07:35:48,346 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-23 07:35:48,346 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-23 07:35:48,346 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 07:35:48,346 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-23 07:35:48,346 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-23 07:35:48,346 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1c_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration2_Loop [2018-11-23 07:35:48,346 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-23 07:35:48,346 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-23 07:35:48,347 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 07:35:48,350 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 07:35:48,351 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 07:35:48,352 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 07:35:48,353 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 07:35:48,355 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 07:35:48,384 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-23 07:35:48,384 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f7bb33fd-2acd-4e9e-b951-9edf7cda5de1/bin-2019/uautomizer/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 07:35:48,386 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 07:35:48,386 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f7bb33fd-2acd-4e9e-b951-9edf7cda5de1/bin-2019/uautomizer/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 07:35:48,414 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-23 07:35:48,414 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 07:35:48,431 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-23 07:35:48,432 INFO L216 LassoAnalysis]: Preferences: [2018-11-23 07:35:48,432 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-23 07:35:48,432 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-23 07:35:48,432 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-23 07:35:48,432 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-23 07:35:48,432 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 07:35:48,432 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-23 07:35:48,432 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-23 07:35:48,432 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1c_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration2_Loop [2018-11-23 07:35:48,433 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-23 07:35:48,433 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-23 07:35:48,433 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 07:35:48,437 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 07:35:48,439 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 07:35:48,440 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 07:35:48,441 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 07:35:48,443 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 07:35:48,466 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-23 07:35:48,466 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-23 07:35:48,466 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-23 07:35:48,467 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 07:35:48,467 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 07:35:48,467 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 07:35:48,467 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 07:35:48,467 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 07:35:48,468 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 07:35:48,468 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 07:35:48,471 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-23 07:35:48,474 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2018-11-23 07:35:48,474 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2018-11-23 07:35:48,474 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-23 07:35:48,474 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-23 07:35:48,475 INFO L518 LassoAnalysis]: Proved termination. [2018-11-23 07:35:48,475 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] [2018-11-23 07:35:48,475 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-23 07:35:48,501 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 07:35:48,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 07:35:48,532 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 07:35:48,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 07:35:48,561 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 07:35:48,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 07:35:48,574 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2018-11-23 07:35:48,575 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 19 states and 24 transitions. cyclomatic complexity: 7 Second operand 5 states. [2018-11-23 07:35:48,644 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 19 states and 24 transitions. cyclomatic complexity: 7. Second operand 5 states. Result 43 states and 58 transitions. Complement of second has 14 states. [2018-11-23 07:35:48,646 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2018-11-23 07:35:48,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-11-23 07:35:48,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 14 transitions. [2018-11-23 07:35:48,647 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 14 transitions. Stem has 10 letters. Loop has 3 letters. [2018-11-23 07:35:48,648 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 07:35:48,648 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 14 transitions. Stem has 13 letters. Loop has 3 letters. [2018-11-23 07:35:48,649 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 07:35:48,649 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 14 transitions. Stem has 10 letters. Loop has 6 letters. [2018-11-23 07:35:48,649 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 07:35:48,649 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 43 states and 58 transitions. [2018-11-23 07:35:48,651 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2018-11-23 07:35:48,653 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 43 states to 37 states and 50 transitions. [2018-11-23 07:35:48,653 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 25 [2018-11-23 07:35:48,653 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 27 [2018-11-23 07:35:48,653 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 50 transitions. [2018-11-23 07:35:48,653 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-23 07:35:48,654 INFO L705 BuchiCegarLoop]: Abstraction has 37 states and 50 transitions. [2018-11-23 07:35:48,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states and 50 transitions. [2018-11-23 07:35:48,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2018-11-23 07:35:48,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-11-23 07:35:48,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 46 transitions. [2018-11-23 07:35:48,658 INFO L728 BuchiCegarLoop]: Abstraction has 35 states and 46 transitions. [2018-11-23 07:35:48,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-23 07:35:48,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-11-23 07:35:48,661 INFO L87 Difference]: Start difference. First operand 35 states and 46 transitions. Second operand 6 states. [2018-11-23 07:35:48,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 07:35:48,700 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2018-11-23 07:35:48,701 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-23 07:35:48,701 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 33 states and 43 transitions. [2018-11-23 07:35:48,702 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2018-11-23 07:35:48,704 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 33 states to 31 states and 40 transitions. [2018-11-23 07:35:48,704 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 26 [2018-11-23 07:35:48,704 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 26 [2018-11-23 07:35:48,704 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 40 transitions. [2018-11-23 07:35:48,704 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-23 07:35:48,704 INFO L705 BuchiCegarLoop]: Abstraction has 31 states and 40 transitions. [2018-11-23 07:35:48,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states and 40 transitions. [2018-11-23 07:35:48,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2018-11-23 07:35:48,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-11-23 07:35:48,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2018-11-23 07:35:48,709 INFO L728 BuchiCegarLoop]: Abstraction has 28 states and 34 transitions. [2018-11-23 07:35:48,709 INFO L608 BuchiCegarLoop]: Abstraction has 28 states and 34 transitions. [2018-11-23 07:35:48,709 INFO L442 BuchiCegarLoop]: ======== Iteration 3============ [2018-11-23 07:35:48,709 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 28 states and 34 transitions. [2018-11-23 07:35:48,710 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2018-11-23 07:35:48,710 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-23 07:35:48,710 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-23 07:35:48,710 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 07:35:48,710 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2018-11-23 07:35:48,711 INFO L794 eck$LassoCheckResult]: Stem: 343#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 320#L25 call main_#t~ret6 := rec2(main_~x~0);< 319#rec2ENTRY ~j := #in~j; 321#L18 assume !(~j <= 0); 323#L20 call #t~ret3 := rec2(~j - 1);< 322#rec2ENTRY ~j := #in~j; 325#L18 assume !(~j <= 0); 324#L20 call #t~ret3 := rec2(~j - 1);< 322#rec2ENTRY ~j := #in~j; 326#L18 assume ~j <= 0;#res := 0; 336#rec2FINAL assume true; 337#rec2EXIT >#33#return; 328#L20-1 call #t~ret4 := rec1(#t~ret3);< 327#rec1ENTRY ~i := #in~i; 329#L12 assume ~i <= 0;#res := 0; 340#rec1FINAL assume true; 341#rec1EXIT >#35#return; 342#L20-2 #res := #t~ret4 - 1;havoc #t~ret3;havoc #t~ret4; 344#rec2FINAL assume true; 346#rec2EXIT >#33#return; 332#L20-1 call #t~ret4 := rec1(#t~ret3);< 338#rec1ENTRY [2018-11-23 07:35:48,711 INFO L796 eck$LassoCheckResult]: Loop: 338#rec1ENTRY ~i := #in~i; 345#L12 assume !(~i <= 0); 334#L14 call #t~ret0 := rec1(~i - 2);< 338#rec1ENTRY [2018-11-23 07:35:48,712 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 07:35:48,712 INFO L82 PathProgramCache]: Analyzing trace with hash -196165858, now seen corresponding path program 1 times [2018-11-23 07:35:48,712 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 07:35:48,712 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 07:35:48,713 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 07:35:48,713 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 07:35:48,713 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 07:35:48,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 07:35:48,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 07:35:48,727 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 07:35:48,727 INFO L82 PathProgramCache]: Analyzing trace with hash 29941, now seen corresponding path program 2 times [2018-11-23 07:35:48,727 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 07:35:48,727 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 07:35:48,728 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 07:35:48,728 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 07:35:48,728 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 07:35:48,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 07:35:48,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-23 07:35:48,732 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 07:35:48,732 INFO L82 PathProgramCache]: Analyzing trace with hash 1473414328, now seen corresponding path program 1 times [2018-11-23 07:35:48,732 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-23 07:35:48,732 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-23 07:35:48,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 07:35:48,733 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 07:35:48,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 07:35:48,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 07:35:48,792 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2018-11-23 07:35:48,792 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-23 07:35:48,792 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2018-11-23 07:35:48,817 INFO L216 LassoAnalysis]: Preferences: [2018-11-23 07:35:48,817 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-23 07:35:48,817 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-23 07:35:48,817 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-23 07:35:48,817 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-23 07:35:48,818 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 07:35:48,818 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-23 07:35:48,818 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-23 07:35:48,818 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1c_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration3_Loop [2018-11-23 07:35:48,818 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-23 07:35:48,818 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-23 07:35:48,819 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 07:35:48,821 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 07:35:48,822 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 07:35:48,824 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 07:35:48,826 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 07:35:48,828 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 07:35:48,846 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-23 07:35:48,847 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f7bb33fd-2acd-4e9e-b951-9edf7cda5de1/bin-2019/uautomizer/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 07:35:48,849 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 07:35:48,849 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 07:35:48,855 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-23 07:35:48,855 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret2=0} Honda state: {rec1_#t~ret2=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f7bb33fd-2acd-4e9e-b951-9edf7cda5de1/bin-2019/uautomizer/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 07:35:48,870 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 07:35:48,870 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 07:35:48,874 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-23 07:35:48,874 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#res=0} Honda state: {rec1_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f7bb33fd-2acd-4e9e-b951-9edf7cda5de1/bin-2019/uautomizer/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 07:35:48,889 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 07:35:48,889 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 07:35:48,891 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-23 07:35:48,891 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret0=0} Honda state: {rec1_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f7bb33fd-2acd-4e9e-b951-9edf7cda5de1/bin-2019/uautomizer/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 07:35:48,905 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 07:35:48,905 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 07:35:48,908 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-23 07:35:48,908 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret1=0} Honda state: {rec1_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f7bb33fd-2acd-4e9e-b951-9edf7cda5de1/bin-2019/uautomizer/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 07:35:48,922 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 07:35:48,922 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 07:35:48,926 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-23 07:35:48,926 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_~i=0} Honda state: {rec1_~i=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f7bb33fd-2acd-4e9e-b951-9edf7cda5de1/bin-2019/uautomizer/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 07:35:48,941 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-23 07:35:48,941 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_f7bb33fd-2acd-4e9e-b951-9edf7cda5de1/bin-2019/uautomizer/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 07:35:48,959 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-23 07:35:48,959 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-23 07:35:48,975 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-23 07:35:48,976 INFO L216 LassoAnalysis]: Preferences: [2018-11-23 07:35:48,976 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-23 07:35:48,976 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-23 07:35:48,976 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-23 07:35:48,976 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-23 07:35:48,976 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-23 07:35:48,976 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-23 07:35:48,976 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-23 07:35:48,976 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1c_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration3_Loop [2018-11-23 07:35:48,976 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-23 07:35:48,977 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-23 07:35:48,977 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 07:35:48,979 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 07:35:48,980 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 07:35:48,981 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 07:35:48,982 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 07:35:48,985 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-23 07:35:48,999 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-23 07:35:48,999 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-23 07:35:48,999 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-23 07:35:49,000 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 07:35:49,000 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 07:35:49,000 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 07:35:49,000 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 07:35:49,000 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 07:35:49,001 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 07:35:49,001 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 07:35:49,002 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-23 07:35:49,002 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-23 07:35:49,002 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 07:35:49,003 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 07:35:49,003 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 07:35:49,003 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 07:35:49,003 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 07:35:49,003 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 07:35:49,003 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 07:35:49,004 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-23 07:35:49,004 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-23 07:35:49,004 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 07:35:49,004 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 07:35:49,004 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 07:35:49,004 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 07:35:49,005 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 07:35:49,005 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 07:35:49,005 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 07:35:49,005 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-23 07:35:49,006 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-23 07:35:49,006 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 07:35:49,006 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 07:35:49,006 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 07:35:49,006 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 07:35:49,006 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 07:35:49,006 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 07:35:49,007 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 07:35:49,007 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-23 07:35:49,007 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-23 07:35:49,007 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-23 07:35:49,008 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-23 07:35:49,008 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-23 07:35:49,008 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-23 07:35:49,008 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-23 07:35:49,008 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-23 07:35:49,008 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-23 07:35:49,011 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-23 07:35:49,013 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2018-11-23 07:35:49,013 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2018-11-23 07:35:49,014 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-23 07:35:49,014 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-23 07:35:49,014 INFO L518 LassoAnalysis]: Proved termination. [2018-11-23 07:35:49,014 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] [2018-11-23 07:35:49,015 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-23 07:35:49,024 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 07:35:49,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 07:35:49,047 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 07:35:49,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 07:35:49,074 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 07:35:49,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 07:35:49,085 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2018-11-23 07:35:49,085 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 28 states and 34 transitions. cyclomatic complexity: 8 Second operand 5 states. [2018-11-23 07:35:49,127 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 28 states and 34 transitions. cyclomatic complexity: 8. Second operand 5 states. Result 31 states and 37 transitions. Complement of second has 7 states. [2018-11-23 07:35:49,127 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 2 stem states 1 non-accepting loop states 1 accepting loop states [2018-11-23 07:35:49,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-11-23 07:35:49,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 12 transitions. [2018-11-23 07:35:49,128 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 12 transitions. Stem has 21 letters. Loop has 3 letters. [2018-11-23 07:35:49,128 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 07:35:49,128 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-23 07:35:49,135 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 07:35:49,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 07:35:49,155 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 07:35:49,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 07:35:49,180 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 07:35:49,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 07:35:49,195 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 3 loop predicates [2018-11-23 07:35:49,195 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 28 states and 34 transitions. cyclomatic complexity: 8 Second operand 5 states. [2018-11-23 07:35:49,230 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 28 states and 34 transitions. cyclomatic complexity: 8. Second operand 5 states. Result 31 states and 37 transitions. Complement of second has 7 states. [2018-11-23 07:35:49,231 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 2 stem states 1 non-accepting loop states 1 accepting loop states [2018-11-23 07:35:49,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-11-23 07:35:49,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 12 transitions. [2018-11-23 07:35:49,231 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 12 transitions. Stem has 21 letters. Loop has 3 letters. [2018-11-23 07:35:49,231 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 07:35:49,232 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-23 07:35:49,239 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 07:35:49,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 07:35:49,262 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 07:35:49,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 07:35:49,284 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 07:35:49,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 07:35:49,295 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2018-11-23 07:35:49,295 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 28 states and 34 transitions. cyclomatic complexity: 8 Second operand 5 states. [2018-11-23 07:35:49,362 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 28 states and 34 transitions. cyclomatic complexity: 8. Second operand 5 states. Result 53 states and 65 transitions. Complement of second has 13 states. [2018-11-23 07:35:49,362 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2018-11-23 07:35:49,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-11-23 07:35:49,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 28 transitions. [2018-11-23 07:35:49,363 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 28 transitions. Stem has 21 letters. Loop has 3 letters. [2018-11-23 07:35:49,363 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 07:35:49,363 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 28 transitions. Stem has 24 letters. Loop has 3 letters. [2018-11-23 07:35:49,364 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 07:35:49,364 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 28 transitions. Stem has 21 letters. Loop has 6 letters. [2018-11-23 07:35:49,364 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-23 07:35:49,364 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 53 states and 65 transitions. [2018-11-23 07:35:49,365 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2018-11-23 07:35:49,366 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 53 states to 41 states and 52 transitions. [2018-11-23 07:35:49,366 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 28 [2018-11-23 07:35:49,366 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 31 [2018-11-23 07:35:49,366 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 52 transitions. [2018-11-23 07:35:49,366 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-23 07:35:49,366 INFO L705 BuchiCegarLoop]: Abstraction has 41 states and 52 transitions. [2018-11-23 07:35:49,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states and 52 transitions. [2018-11-23 07:35:49,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2018-11-23 07:35:49,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-11-23 07:35:49,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 48 transitions. [2018-11-23 07:35:49,368 INFO L728 BuchiCegarLoop]: Abstraction has 39 states and 48 transitions. [2018-11-23 07:35:49,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-23 07:35:49,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-11-23 07:35:49,369 INFO L87 Difference]: Start difference. First operand 39 states and 48 transitions. Second operand 8 states. [2018-11-23 07:35:49,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 07:35:49,396 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2018-11-23 07:35:49,396 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-11-23 07:35:49,397 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 27 states and 29 transitions. [2018-11-23 07:35:49,397 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2018-11-23 07:35:49,397 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 27 states to 0 states and 0 transitions. [2018-11-23 07:35:49,397 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2018-11-23 07:35:49,397 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2018-11-23 07:35:49,397 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2018-11-23 07:35:49,398 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2018-11-23 07:35:49,398 INFO L705 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-23 07:35:49,398 INFO L728 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-23 07:35:49,398 INFO L608 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-23 07:35:49,398 INFO L442 BuchiCegarLoop]: ======== Iteration 4============ [2018-11-23 07:35:49,398 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2018-11-23 07:35:49,398 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2018-11-23 07:35:49,398 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2018-11-23 07:35:49,402 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 23.11 07:35:49 BoogieIcfgContainer [2018-11-23 07:35:49,402 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2018-11-23 07:35:49,402 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-23 07:35:49,403 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-23 07:35:49,403 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-23 07:35:49,403 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 07:35:47" (3/4) ... [2018-11-23 07:35:49,406 INFO L147 WitnessPrinter]: No result that supports witness generation found [2018-11-23 07:35:49,406 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-23 07:35:49,406 INFO L168 Benchmark]: Toolchain (without parser) took 2201.40 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 210.8 MB). Free memory was 954.8 MB in the beginning and 1.2 GB in the end (delta: -223.6 MB). There was no memory consumed. Max. memory is 11.5 GB. [2018-11-23 07:35:49,407 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 1.0 GB. Free memory is still 985.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-23 07:35:49,407 INFO L168 Benchmark]: CACSL2BoogieTranslator took 150.31 ms. Allocated memory is still 1.0 GB. Free memory was 954.8 MB in the beginning and 944.1 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-23 07:35:49,408 INFO L168 Benchmark]: Boogie Procedure Inliner took 17.30 ms. Allocated memory is still 1.0 GB. Free memory was 944.1 MB in the beginning and 941.4 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-23 07:35:49,408 INFO L168 Benchmark]: Boogie Preprocessor took 9.01 ms. Allocated memory is still 1.0 GB. Free memory is still 941.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-23 07:35:49,408 INFO L168 Benchmark]: RCFGBuilder took 166.51 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 133.2 MB). Free memory was 941.4 MB in the beginning and 1.1 GB in the end (delta: -167.9 MB). Peak memory consumption was 14.6 MB. Max. memory is 11.5 GB. [2018-11-23 07:35:49,409 INFO L168 Benchmark]: BuchiAutomizer took 1852.02 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 77.6 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -69.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 11.5 GB. [2018-11-23 07:35:49,409 INFO L168 Benchmark]: Witness Printer took 3.29 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-23 07:35:49,411 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 1.0 GB. Free memory is still 985.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 150.31 ms. Allocated memory is still 1.0 GB. Free memory was 954.8 MB in the beginning and 944.1 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 17.30 ms. Allocated memory is still 1.0 GB. Free memory was 944.1 MB in the beginning and 941.4 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 9.01 ms. Allocated memory is still 1.0 GB. Free memory is still 941.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 166.51 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 133.2 MB). Free memory was 941.4 MB in the beginning and 1.1 GB in the end (delta: -167.9 MB). Peak memory consumption was 14.6 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 1852.02 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 77.6 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -69.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 11.5 GB. * Witness Printer took 3.29 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 5 terminating modules (2 trivial, 2 deterministic, 1 nondeterministic). One deterministic module has affine ranking function \old(j) and consists of 4 locations. One deterministic module has affine ranking function \old(i) and consists of 5 locations. One nondeterministic module has affine ranking function \old(i) and consists of 5 locations. 2 modules have a trivial ranking function, the largest among these consists of 8 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 1.8s and 4 iterations. TraceHistogramMax:3. Analysis of lassos took 0.9s. Construction of modules took 0.1s. Büchi inclusion checks took 0.6s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 4. Automata minimization 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 11 StatesRemovedByMinimization, 4 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 28 states and ocurred in iteration 2. Nontrivial modules had stage [2, 0, 1, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 88 SDtfs, 94 SDslu, 174 SDs, 0 SdLazy, 125 SolverSat, 48 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT1 conc0 concLT2 SILN0 SILU0 SILI0 SILT0 lasso0 LassoPreprocessingBenchmarks: Lassos: inital10 mio100 ax100 hnf100 lsp100 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq160 hnf93 smp100 dnf100 smp100 tf113 neg100 sie111 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 7ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 8 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 3 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.1s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...