./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/termination-crafted/NestedRecursion_1d_true-no-overflow_true-termination_true-valid-memsafety.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 635dfa2a Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_3973d146-ee06-4895-8145-dfce43259522/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_3973d146-ee06-4895-8145-dfce43259522/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_3973d146-ee06-4895-8145-dfce43259522/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_3973d146-ee06-4895-8145-dfce43259522/bin-2019/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-crafted/NestedRecursion_1d_true-no-overflow_true-termination_true-valid-memsafety.c -s /tmp/vcloud-vcloud-master/worker/working_dir_3973d146-ee06-4895-8145-dfce43259522/bin-2019/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_3973d146-ee06-4895-8145-dfce43259522/bin-2019/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(F end) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 0837a1e1d82be1b28ccf3514392f1b01c88a9160 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-635dfa2 [2018-12-01 14:04:15,786 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-01 14:04:15,787 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-01 14:04:15,793 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-01 14:04:15,793 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-01 14:04:15,794 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-01 14:04:15,794 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-01 14:04:15,795 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-01 14:04:15,796 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-01 14:04:15,796 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-01 14:04:15,797 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-01 14:04:15,797 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-01 14:04:15,797 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-01 14:04:15,798 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-01 14:04:15,799 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-01 14:04:15,799 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-01 14:04:15,799 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-01 14:04:15,800 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-01 14:04:15,801 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-01 14:04:15,802 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-01 14:04:15,802 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-01 14:04:15,803 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-01 14:04:15,804 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-01 14:04:15,804 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-01 14:04:15,804 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-01 14:04:15,805 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-01 14:04:15,805 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-01 14:04:15,806 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-01 14:04:15,806 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-01 14:04:15,807 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-01 14:04:15,807 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-01 14:04:15,807 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-01 14:04:15,807 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-01 14:04:15,807 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-01 14:04:15,808 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-01 14:04:15,808 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-01 14:04:15,808 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_3973d146-ee06-4895-8145-dfce43259522/bin-2019/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf [2018-12-01 14:04:15,816 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-01 14:04:15,816 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-01 14:04:15,817 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-12-01 14:04:15,817 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-12-01 14:04:15,817 INFO L133 SettingsManager]: * Use SBE=true [2018-12-01 14:04:15,817 INFO L131 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2018-12-01 14:04:15,817 INFO L133 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2018-12-01 14:04:15,817 INFO L133 SettingsManager]: * Use old map elimination=false [2018-12-01 14:04:15,817 INFO L133 SettingsManager]: * Use external solver (rank synthesis)=false [2018-12-01 14:04:15,817 INFO L133 SettingsManager]: * Use only trivial implications for array writes=true [2018-12-01 14:04:15,817 INFO L133 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2018-12-01 14:04:15,817 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-01 14:04:15,818 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-12-01 14:04:15,818 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-01 14:04:15,818 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-01 14:04:15,818 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2018-12-01 14:04:15,818 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2018-12-01 14:04:15,818 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2018-12-01 14:04:15,818 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-01 14:04:15,818 INFO L133 SettingsManager]: * Assume nondeterminstic values are in range=false [2018-12-01 14:04:15,818 INFO L133 SettingsManager]: * Use constant arrays=true [2018-12-01 14:04:15,818 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2018-12-01 14:04:15,818 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-01 14:04:15,819 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-01 14:04:15,819 INFO L133 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2018-12-01 14:04:15,819 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-01 14:04:15,819 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-12-01 14:04:15,819 INFO L133 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2018-12-01 14:04:15,819 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-12-01 14:04:15,820 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_3973d146-ee06-4895-8145-dfce43259522/bin-2019/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0837a1e1d82be1b28ccf3514392f1b01c88a9160 [2018-12-01 14:04:15,837 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-01 14:04:15,846 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-01 14:04:15,848 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-01 14:04:15,849 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-01 14:04:15,849 INFO L276 PluginConnector]: CDTParser initialized [2018-12-01 14:04:15,850 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_3973d146-ee06-4895-8145-dfce43259522/bin-2019/uautomizer/../../sv-benchmarks/c/termination-crafted/NestedRecursion_1d_true-no-overflow_true-termination_true-valid-memsafety.c [2018-12-01 14:04:15,896 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_3973d146-ee06-4895-8145-dfce43259522/bin-2019/uautomizer/data/98b98f3a3/16d02aefdc5547d0b7ce513747086404/FLAG26d2c2af9 [2018-12-01 14:04:16,281 INFO L307 CDTParser]: Found 1 translation units. [2018-12-01 14:04:16,282 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_3973d146-ee06-4895-8145-dfce43259522/sv-benchmarks/c/termination-crafted/NestedRecursion_1d_true-no-overflow_true-termination_true-valid-memsafety.c [2018-12-01 14:04:16,285 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_3973d146-ee06-4895-8145-dfce43259522/bin-2019/uautomizer/data/98b98f3a3/16d02aefdc5547d0b7ce513747086404/FLAG26d2c2af9 [2018-12-01 14:04:16,293 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_3973d146-ee06-4895-8145-dfce43259522/bin-2019/uautomizer/data/98b98f3a3/16d02aefdc5547d0b7ce513747086404 [2018-12-01 14:04:16,295 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-01 14:04:16,296 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-01 14:04:16,297 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-01 14:04:16,297 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-01 14:04:16,299 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-01 14:04:16,299 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 02:04:16" (1/1) ... [2018-12-01 14:04:16,301 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bf0f09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 02:04:16, skipping insertion in model container [2018-12-01 14:04:16,302 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 02:04:16" (1/1) ... [2018-12-01 14:04:16,307 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-01 14:04:16,319 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-01 14:04:16,409 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-01 14:04:16,411 INFO L191 MainTranslator]: Completed pre-run [2018-12-01 14:04:16,420 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-01 14:04:16,428 INFO L195 MainTranslator]: Completed translation [2018-12-01 14:04:16,428 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 02:04:16 WrapperNode [2018-12-01 14:04:16,428 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-01 14:04:16,428 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-01 14:04:16,429 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-01 14:04:16,429 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-01 14:04:16,434 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 02:04:16" (1/1) ... [2018-12-01 14:04:16,436 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 02:04:16" (1/1) ... [2018-12-01 14:04:16,446 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-01 14:04:16,447 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-01 14:04:16,447 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-01 14:04:16,447 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-01 14:04:16,452 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 02:04:16" (1/1) ... [2018-12-01 14:04:16,452 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 02:04:16" (1/1) ... [2018-12-01 14:04:16,453 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 02:04:16" (1/1) ... [2018-12-01 14:04:16,453 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 02:04:16" (1/1) ... [2018-12-01 14:04:16,454 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 02:04:16" (1/1) ... [2018-12-01 14:04:16,455 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 02:04:16" (1/1) ... [2018-12-01 14:04:16,455 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 02:04:16" (1/1) ... [2018-12-01 14:04:16,456 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-01 14:04:16,456 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-01 14:04:16,456 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-01 14:04:16,456 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-01 14:04:16,457 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 02:04:16" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3973d146-ee06-4895-8145-dfce43259522/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 [2018-12-01 14:04:16,519 INFO L130 BoogieDeclarations]: Found specification of procedure rec1 [2018-12-01 14:04:16,520 INFO L138 BoogieDeclarations]: Found implementation of procedure rec1 [2018-12-01 14:04:16,520 INFO L130 BoogieDeclarations]: Found specification of procedure rec2 [2018-12-01 14:04:16,520 INFO L138 BoogieDeclarations]: Found implementation of procedure rec2 [2018-12-01 14:04:16,520 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-01 14:04:16,520 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-01 14:04:16,596 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-01 14:04:16,596 INFO L280 CfgBuilder]: Removed 4 assue(true) statements. [2018-12-01 14:04:16,596 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 02:04:16 BoogieIcfgContainer [2018-12-01 14:04:16,596 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-01 14:04:16,597 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2018-12-01 14:04:16,597 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2018-12-01 14:04:16,599 INFO L276 PluginConnector]: BuchiAutomizer initialized [2018-12-01 14:04:16,599 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-12-01 14:04:16,599 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 01.12 02:04:16" (1/3) ... [2018-12-01 14:04:16,600 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@7b8a3dd6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 01.12 02:04:16, skipping insertion in model container [2018-12-01 14:04:16,600 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-12-01 14:04:16,600 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 02:04:16" (2/3) ... [2018-12-01 14:04:16,601 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@7b8a3dd6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 01.12 02:04:16, skipping insertion in model container [2018-12-01 14:04:16,601 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-12-01 14:04:16,601 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 02:04:16" (3/3) ... [2018-12-01 14:04:16,602 INFO L375 chiAutomizerObserver]: Analyzing ICFG NestedRecursion_1d_true-no-overflow_true-termination_true-valid-memsafety.c [2018-12-01 14:04:16,633 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-12-01 14:04:16,634 INFO L374 BuchiCegarLoop]: Interprodecural is true [2018-12-01 14:04:16,634 INFO L375 BuchiCegarLoop]: Hoare is false [2018-12-01 14:04:16,634 INFO L376 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2018-12-01 14:04:16,634 INFO L377 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-01 14:04:16,634 INFO L378 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-01 14:04:16,634 INFO L379 BuchiCegarLoop]: Difference is false [2018-12-01 14:04:16,634 INFO L380 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-01 14:04:16,634 INFO L383 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2018-12-01 14:04:16,643 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 21 states. [2018-12-01 14:04:16,657 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2018-12-01 14:04:16,657 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-12-01 14:04:16,657 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-12-01 14:04:16,662 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2018-12-01 14:04:16,662 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 14:04:16,662 INFO L442 BuchiCegarLoop]: ======== Iteration 1============ [2018-12-01 14:04:16,662 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 21 states. [2018-12-01 14:04:16,664 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2018-12-01 14:04:16,664 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-12-01 14:04:16,664 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-12-01 14:04:16,664 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2018-12-01 14:04:16,664 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 14:04:16,669 INFO L794 eck$LassoCheckResult]: Stem: 13#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 22#L25true call main_#t~ret6 := rec2(main_~x~0);< 3#rec2ENTRYtrue [2018-12-01 14:04:16,669 INFO L796 eck$LassoCheckResult]: Loop: 3#rec2ENTRYtrue ~j := #in~j; 20#L18true assume !(~j <= 0); 18#L20true call #t~ret3 := rec1(~j);< 4#rec1ENTRYtrue ~i := #in~i; 9#L12true assume ~i <= 0;#res := 0; 5#rec1FINALtrue assume true; 12#rec1EXITtrue >#33#return; 23#L20-1true call #t~ret4 := rec2(#t~ret3 - 1);< 3#rec2ENTRYtrue [2018-12-01 14:04:16,672 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 14:04:16,672 INFO L82 PathProgramCache]: Analyzing trace with hash 1617, now seen corresponding path program 1 times [2018-12-01 14:04:16,673 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 14:04:16,674 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 14:04:16,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 14:04:16,701 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 14:04:16,701 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 14:04:16,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-01 14:04:16,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-01 14:04:16,724 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 14:04:16,724 INFO L82 PathProgramCache]: Analyzing trace with hash -1102838740, now seen corresponding path program 1 times [2018-12-01 14:04:16,724 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 14:04:16,725 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 14:04:16,725 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 14:04:16,725 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 14:04:16,725 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 14:04:16,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 14:04:16,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 14:04:16,775 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-01 14:04:16,775 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-01 14:04:16,778 INFO L811 eck$LassoCheckResult]: loop already infeasible [2018-12-01 14:04:16,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-01 14:04:16,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-12-01 14:04:16,788 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 5 states. [2018-12-01 14:04:16,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 14:04:16,840 INFO L93 Difference]: Finished difference Result 25 states and 33 transitions. [2018-12-01 14:04:16,841 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-12-01 14:04:16,842 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 25 states and 33 transitions. [2018-12-01 14:04:16,844 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2018-12-01 14:04:16,849 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 25 states to 16 states and 22 transitions. [2018-12-01 14:04:16,849 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 16 [2018-12-01 14:04:16,849 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 16 [2018-12-01 14:04:16,850 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 22 transitions. [2018-12-01 14:04:16,851 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2018-12-01 14:04:16,851 INFO L705 BuchiCegarLoop]: Abstraction has 16 states and 22 transitions. [2018-12-01 14:04:16,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states and 22 transitions. [2018-12-01 14:04:16,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-12-01 14:04:16,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-12-01 14:04:16,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2018-12-01 14:04:16,870 INFO L728 BuchiCegarLoop]: Abstraction has 16 states and 22 transitions. [2018-12-01 14:04:16,870 INFO L608 BuchiCegarLoop]: Abstraction has 16 states and 22 transitions. [2018-12-01 14:04:16,870 INFO L442 BuchiCegarLoop]: ======== Iteration 2============ [2018-12-01 14:04:16,870 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 16 states and 22 transitions. [2018-12-01 14:04:16,871 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2018-12-01 14:04:16,871 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-12-01 14:04:16,871 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-12-01 14:04:16,871 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2018-12-01 14:04:16,871 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 14:04:16,872 INFO L794 eck$LassoCheckResult]: Stem: 73#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; 60#L25 call main_#t~ret6 := rec2(main_~x~0);< 59#rec2ENTRY [2018-12-01 14:04:16,872 INFO L796 eck$LassoCheckResult]: Loop: 59#rec2ENTRY ~j := #in~j; 62#L18 assume !(~j <= 0); 66#L20 call #t~ret3 := rec1(~j);< 63#rec1ENTRY ~i := #in~i; 68#L12 assume !(~i <= 0); 67#L14 call #t~ret0 := rec1(~i - 2);< 63#rec1ENTRY ~i := #in~i; 68#L12 assume ~i <= 0;#res := 0; 69#rec1FINAL assume true; 70#rec1EXIT >#27#return; 64#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 63#rec1ENTRY ~i := #in~i; 68#L12 assume ~i <= 0;#res := 0; 69#rec1FINAL assume true; 70#rec1EXIT >#29#return; 65#L14-2 call #t~ret2 := rec1(#t~ret1);< 63#rec1ENTRY ~i := #in~i; 68#L12 assume ~i <= 0;#res := 0; 69#rec1FINAL assume true; 70#rec1EXIT >#31#return; 71#L14-3 #res := 1 + #t~ret2;havoc #t~ret1;havoc #t~ret2;havoc #t~ret0; 72#rec1FINAL assume true; 74#rec1EXIT >#33#return; 61#L20-1 call #t~ret4 := rec2(#t~ret3 - 1);< 59#rec2ENTRY [2018-12-01 14:04:16,872 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 14:04:16,872 INFO L82 PathProgramCache]: Analyzing trace with hash 1617, now seen corresponding path program 2 times [2018-12-01 14:04:16,872 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 14:04:16,872 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 14:04:16,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 14:04:16,873 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 14:04:16,873 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 14:04:16,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-01 14:04:16,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-01 14:04:16,875 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 14:04:16,875 INFO L82 PathProgramCache]: Analyzing trace with hash -616266826, now seen corresponding path program 1 times [2018-12-01 14:04:16,876 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 14:04:16,876 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 14:04:16,876 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 14:04:16,876 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 14:04:16,876 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 14:04:16,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-01 14:04:16,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-01 14:04:16,892 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 14:04:16,892 INFO L82 PathProgramCache]: Analyzing trace with hash 1277860358, now seen corresponding path program 1 times [2018-12-01 14:04:16,892 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 14:04:16,892 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 14:04:16,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 14:04:16,893 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 14:04:16,893 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 14:04:16,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-01 14:04:16,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-01 14:04:17,097 INFO L216 LassoAnalysis]: Preferences: [2018-12-01 14:04:17,098 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-12-01 14:04:17,098 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-12-01 14:04:17,098 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-12-01 14:04:17,098 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-12-01 14:04:17,098 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-01 14:04:17,098 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-12-01 14:04:17,098 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-12-01 14:04:17,099 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1d_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration2_Loop [2018-12-01 14:04:17,099 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-12-01 14:04:17,099 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-12-01 14:04:17,111 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-01 14:04:17,115 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-01 14:04:17,116 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-01 14:04:17,117 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-01 14:04:17,118 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-01 14:04:17,147 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-12-01 14:04:17,148 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3973d146-ee06-4895-8145-dfce43259522/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 [2018-12-01 14:04:17,151 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-01 14:04:17,151 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-01 14:04:17,156 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-01 14:04:17,156 INFO L448 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec2_~j=0} Honda state: {rec2_~j=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3973d146-ee06-4895-8145-dfce43259522/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 [2018-12-01 14:04:17,171 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-01 14:04:17,171 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-01 14:04:17,173 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-01 14:04:17,174 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_3973d146-ee06-4895-8145-dfce43259522/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 [2018-12-01 14:04:17,188 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-01 14:04:17,188 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-01 14:04:17,190 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-01 14:04:17,190 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_3973d146-ee06-4895-8145-dfce43259522/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 [2018-12-01 14:04:17,206 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-01 14:04:17,206 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-01 14:04:17,208 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-01 14:04:17,208 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_3973d146-ee06-4895-8145-dfce43259522/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 [2018-12-01 14:04:17,223 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-01 14:04:17,223 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3973d146-ee06-4895-8145-dfce43259522/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 [2018-12-01 14:04:17,240 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-12-01 14:04:17,240 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-01 14:04:17,243 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-12-01 14:04:17,256 INFO L216 LassoAnalysis]: Preferences: [2018-12-01 14:04:17,256 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-12-01 14:04:17,256 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-12-01 14:04:17,256 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-12-01 14:04:17,257 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-12-01 14:04:17,257 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-01 14:04:17,257 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-12-01 14:04:17,257 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-12-01 14:04:17,257 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1d_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration2_Loop [2018-12-01 14:04:17,257 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-12-01 14:04:17,257 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-12-01 14:04:17,258 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-01 14:04:17,261 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-01 14:04:17,262 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-01 14:04:17,263 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-01 14:04:17,268 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-01 14:04:17,296 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-12-01 14:04:17,299 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-12-01 14:04:17,300 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 [2018-12-01 14:04:17,301 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-01 14:04:17,301 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-01 14:04:17,302 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-01 14:04:17,302 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-01 14:04:17,302 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-01 14:04:17,303 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-01 14:04:17,304 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-01 14:04:17,305 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-01 14:04:17,305 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 [2018-12-01 14:04:17,306 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-01 14:04:17,306 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-01 14:04:17,306 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-01 14:04:17,306 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-01 14:04:17,306 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-01 14:04:17,307 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-01 14:04:17,307 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-01 14:04:17,308 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-01 14:04:17,308 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 [2018-12-01 14:04:17,309 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-01 14:04:17,309 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-01 14:04:17,309 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-01 14:04:17,309 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-01 14:04:17,309 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-01 14:04:17,309 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-01 14:04:17,309 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-01 14:04:17,310 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-01 14:04:17,311 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 [2018-12-01 14:04:17,311 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-01 14:04:17,312 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-01 14:04:17,312 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-01 14:04:17,312 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-01 14:04:17,312 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-01 14:04:17,312 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-01 14:04:17,312 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-01 14:04:17,316 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-12-01 14:04:17,319 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-12-01 14:04:17,320 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-12-01 14:04:17,321 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-12-01 14:04:17,321 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-12-01 14:04:17,321 INFO L518 LassoAnalysis]: Proved termination. [2018-12-01 14:04:17,322 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec2_#in~j) = 1*rec2_#in~j Supporting invariants [] [2018-12-01 14:04:17,323 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-12-01 14:04:17,345 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 14:04:17,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 14:04:17,355 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 14:04:17,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 14:04:17,389 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 14:04:17,472 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-12-01 14:04:17,474 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 8 loop predicates [2018-12-01 14:04:17,474 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 16 states and 22 transitions. cyclomatic complexity: 8 Second operand 9 states. [2018-12-01 14:04:17,736 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 16 states and 22 transitions. cyclomatic complexity: 8. Second operand 9 states. Result 101 states and 147 transitions. Complement of second has 42 states. [2018-12-01 14:04:17,736 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 10 states 1 stem states 8 non-accepting loop states 1 accepting loop states [2018-12-01 14:04:17,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-12-01 14:04:17,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 36 transitions. [2018-12-01 14:04:17,739 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 36 transitions. Stem has 2 letters. Loop has 24 letters. [2018-12-01 14:04:17,740 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-01 14:04:17,740 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 36 transitions. Stem has 26 letters. Loop has 24 letters. [2018-12-01 14:04:17,740 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-01 14:04:17,741 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 36 transitions. Stem has 2 letters. Loop has 48 letters. [2018-12-01 14:04:17,741 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-01 14:04:17,741 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 101 states and 147 transitions. [2018-12-01 14:04:17,745 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2018-12-01 14:04:17,749 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 101 states to 89 states and 135 transitions. [2018-12-01 14:04:17,749 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 38 [2018-12-01 14:04:17,749 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 41 [2018-12-01 14:04:17,750 INFO L73 IsDeterministic]: Start isDeterministic. Operand 89 states and 135 transitions. [2018-12-01 14:04:17,750 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-12-01 14:04:17,750 INFO L705 BuchiCegarLoop]: Abstraction has 89 states and 135 transitions. [2018-12-01 14:04:17,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states and 135 transitions. [2018-12-01 14:04:17,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 62. [2018-12-01 14:04:17,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-12-01 14:04:17,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 98 transitions. [2018-12-01 14:04:17,758 INFO L728 BuchiCegarLoop]: Abstraction has 62 states and 98 transitions. [2018-12-01 14:04:17,758 INFO L608 BuchiCegarLoop]: Abstraction has 62 states and 98 transitions. [2018-12-01 14:04:17,759 INFO L442 BuchiCegarLoop]: ======== Iteration 3============ [2018-12-01 14:04:17,759 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 62 states and 98 transitions. [2018-12-01 14:04:17,760 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2018-12-01 14:04:17,760 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-12-01 14:04:17,760 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-12-01 14:04:17,760 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 14:04:17,761 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2018-12-01 14:04:17,761 INFO L794 eck$LassoCheckResult]: Stem: 371#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; 334#L25 call main_#t~ret6 := rec2(main_~x~0);< 333#rec2ENTRY ~j := #in~j; 336#L18 assume !(~j <= 0); 366#L20 call #t~ret3 := rec1(~j);< 378#rec1ENTRY ~i := #in~i; 365#L12 assume !(~i <= 0); 345#L14 call #t~ret0 := rec1(~i - 2);< 339#rec1ENTRY [2018-12-01 14:04:17,761 INFO L796 eck$LassoCheckResult]: Loop: 339#rec1ENTRY ~i := #in~i; 347#L12 assume !(~i <= 0); 344#L14 call #t~ret0 := rec1(~i - 2);< 339#rec1ENTRY [2018-12-01 14:04:17,761 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 14:04:17,761 INFO L82 PathProgramCache]: Analyzing trace with hash 874549579, now seen corresponding path program 1 times [2018-12-01 14:04:17,761 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 14:04:17,761 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 14:04:17,762 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 14:04:17,762 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 14:04:17,762 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 14:04:17,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-01 14:04:17,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-01 14:04:17,767 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 14:04:17,768 INFO L82 PathProgramCache]: Analyzing trace with hash 29941, now seen corresponding path program 1 times [2018-12-01 14:04:17,768 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 14:04:17,768 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 14:04:17,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 14:04:17,768 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 14:04:17,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 14:04:17,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-01 14:04:17,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-01 14:04:17,771 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 14:04:17,771 INFO L82 PathProgramCache]: Analyzing trace with hash 434890603, now seen corresponding path program 2 times [2018-12-01 14:04:17,771 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 14:04:17,771 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 14:04:17,771 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 14:04:17,771 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 14:04:17,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 14:04:17,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-01 14:04:17,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-01 14:04:17,798 INFO L216 LassoAnalysis]: Preferences: [2018-12-01 14:04:17,798 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-12-01 14:04:17,798 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-12-01 14:04:17,798 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-12-01 14:04:17,798 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-12-01 14:04:17,798 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-01 14:04:17,798 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-12-01 14:04:17,798 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-12-01 14:04:17,799 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1d_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration3_Loop [2018-12-01 14:04:17,799 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-12-01 14:04:17,799 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-12-01 14:04:17,799 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-01 14:04:17,800 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-01 14:04:17,801 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-01 14:04:17,802 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-01 14:04:17,803 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-01 14:04:17,806 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-01 14:04:17,825 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-12-01 14:04:17,825 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3973d146-ee06-4895-8145-dfce43259522/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 [2018-12-01 14:04:17,826 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-01 14:04:17,826 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-01 14:04:17,828 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-01 14:04:17,828 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_3973d146-ee06-4895-8145-dfce43259522/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 [2018-12-01 14:04:17,844 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-01 14:04:17,844 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-01 14:04:17,846 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-01 14:04:17,846 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_3973d146-ee06-4895-8145-dfce43259522/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 [2018-12-01 14:04:17,860 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-01 14:04:17,860 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-01 14:04:17,862 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-01 14:04:17,862 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_3973d146-ee06-4895-8145-dfce43259522/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 [2018-12-01 14:04:17,877 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-01 14:04:17,877 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-01 14:04:17,879 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-01 14:04:17,879 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_3973d146-ee06-4895-8145-dfce43259522/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 [2018-12-01 14:04:17,893 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-01 14:04:17,893 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3973d146-ee06-4895-8145-dfce43259522/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 [2018-12-01 14:04:17,910 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-12-01 14:04:17,910 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-01 14:04:17,925 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-12-01 14:04:17,926 INFO L216 LassoAnalysis]: Preferences: [2018-12-01 14:04:17,926 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-12-01 14:04:17,926 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-12-01 14:04:17,926 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-12-01 14:04:17,926 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-12-01 14:04:17,926 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-01 14:04:17,926 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-12-01 14:04:17,927 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-12-01 14:04:17,927 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1d_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration3_Loop [2018-12-01 14:04:17,927 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-12-01 14:04:17,927 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-12-01 14:04:17,927 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-01 14:04:17,929 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-01 14:04:17,930 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-01 14:04:17,931 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-01 14:04:17,937 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-01 14:04:17,940 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-01 14:04:17,967 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-12-01 14:04:17,967 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-12-01 14:04:17,967 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 [2018-12-01 14:04:17,968 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-01 14:04:17,968 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-01 14:04:17,968 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-01 14:04:17,968 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-01 14:04:17,968 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-01 14:04:17,968 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-01 14:04:17,969 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-01 14:04:17,969 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-01 14:04:17,970 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-12-01 14:04:17,970 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-01 14:04:17,970 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-01 14:04:17,970 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-01 14:04:17,970 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-01 14:04:17,970 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-01 14:04:17,970 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-01 14:04:17,971 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-01 14:04:17,971 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-01 14:04:17,971 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 [2018-12-01 14:04:17,972 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-01 14:04:17,972 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-01 14:04:17,972 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-01 14:04:17,972 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-01 14:04:17,972 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-01 14:04:17,972 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-01 14:04:17,972 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-01 14:04:17,973 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-01 14:04:17,973 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 [2018-12-01 14:04:17,973 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-01 14:04:17,973 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-01 14:04:17,974 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-01 14:04:17,974 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-01 14:04:17,974 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-01 14:04:17,974 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-01 14:04:17,974 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-01 14:04:17,976 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-12-01 14:04:17,977 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2018-12-01 14:04:17,977 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2018-12-01 14:04:17,978 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-12-01 14:04:17,978 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-12-01 14:04:17,978 INFO L518 LassoAnalysis]: Proved termination. [2018-12-01 14:04:17,978 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] [2018-12-01 14:04:17,978 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-12-01 14:04:17,989 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 14:04:17,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 14:04:17,999 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 14:04:18,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 14:04:18,005 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 14:04:18,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 14:04:18,017 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 [2018-12-01 14:04:18,017 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 62 states and 98 transitions. cyclomatic complexity: 40 Second operand 4 states. [2018-12-01 14:04:18,050 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 62 states and 98 transitions. cyclomatic complexity: 40. Second operand 4 states. Result 108 states and 165 transitions. Complement of second has 13 states. [2018-12-01 14:04:18,050 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 [2018-12-01 14:04:18,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2018-12-01 14:04:18,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 13 transitions. [2018-12-01 14:04:18,051 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 13 transitions. Stem has 8 letters. Loop has 3 letters. [2018-12-01 14:04:18,051 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-01 14:04:18,051 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 13 transitions. Stem has 11 letters. Loop has 3 letters. [2018-12-01 14:04:18,051 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-01 14:04:18,051 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 13 transitions. Stem has 8 letters. Loop has 6 letters. [2018-12-01 14:04:18,051 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-01 14:04:18,052 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 108 states and 165 transitions. [2018-12-01 14:04:18,054 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2018-12-01 14:04:18,056 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 108 states to 96 states and 153 transitions. [2018-12-01 14:04:18,056 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 40 [2018-12-01 14:04:18,056 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 42 [2018-12-01 14:04:18,056 INFO L73 IsDeterministic]: Start isDeterministic. Operand 96 states and 153 transitions. [2018-12-01 14:04:18,056 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-12-01 14:04:18,056 INFO L705 BuchiCegarLoop]: Abstraction has 96 states and 153 transitions. [2018-12-01 14:04:18,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states and 153 transitions. [2018-12-01 14:04:18,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 92. [2018-12-01 14:04:18,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-12-01 14:04:18,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 143 transitions. [2018-12-01 14:04:18,062 INFO L728 BuchiCegarLoop]: Abstraction has 92 states and 143 transitions. [2018-12-01 14:04:18,063 INFO L608 BuchiCegarLoop]: Abstraction has 92 states and 143 transitions. [2018-12-01 14:04:18,063 INFO L442 BuchiCegarLoop]: ======== Iteration 4============ [2018-12-01 14:04:18,063 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 92 states and 143 transitions. [2018-12-01 14:04:18,064 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2018-12-01 14:04:18,064 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-12-01 14:04:18,064 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-12-01 14:04:18,064 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 14:04:18,064 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2018-12-01 14:04:18,064 INFO L794 eck$LassoCheckResult]: Stem: 604#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; 605#L25 call main_#t~ret6 := rec2(main_~x~0);< 609#rec2ENTRY ~j := #in~j; 629#L18 assume !(~j <= 0); 576#L20 call #t~ret3 := rec1(~j);< 575#rec1ENTRY ~i := #in~i; 577#L12 assume !(~i <= 0); 595#L14 call #t~ret0 := rec1(~i - 2);< 606#rec1ENTRY ~i := #in~i; 641#L12 assume ~i <= 0;#res := 0; 640#rec1FINAL assume true; 614#rec1EXIT >#27#return; 588#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 590#rec1ENTRY [2018-12-01 14:04:18,064 INFO L796 eck$LassoCheckResult]: Loop: 590#rec1ENTRY ~i := #in~i; 624#L12 assume !(~i <= 0); 596#L14 call #t~ret0 := rec1(~i - 2);< 590#rec1ENTRY [2018-12-01 14:04:18,065 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 14:04:18,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1317996508, now seen corresponding path program 1 times [2018-12-01 14:04:18,065 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 14:04:18,065 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 14:04:18,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 14:04:18,065 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 14:04:18,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 14:04:18,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-01 14:04:18,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-01 14:04:18,071 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 14:04:18,071 INFO L82 PathProgramCache]: Analyzing trace with hash 29941, now seen corresponding path program 2 times [2018-12-01 14:04:18,071 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 14:04:18,071 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 14:04:18,072 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 14:04:18,072 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 14:04:18,072 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 14:04:18,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-01 14:04:18,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-01 14:04:18,074 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 14:04:18,074 INFO L82 PathProgramCache]: Analyzing trace with hash -157050054, now seen corresponding path program 2 times [2018-12-01 14:04:18,074 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 14:04:18,074 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 14:04:18,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 14:04:18,075 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 14:04:18,075 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 14:04:18,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 14:04:18,098 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-01 14:04:18,098 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-01 14:04:18,098 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-12-01 14:04:18,117 INFO L216 LassoAnalysis]: Preferences: [2018-12-01 14:04:18,117 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-12-01 14:04:18,117 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-12-01 14:04:18,117 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-12-01 14:04:18,117 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-12-01 14:04:18,117 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-01 14:04:18,117 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-12-01 14:04:18,117 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-12-01 14:04:18,117 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1d_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration4_Loop [2018-12-01 14:04:18,118 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-12-01 14:04:18,118 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-12-01 14:04:18,118 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-01 14:04:18,119 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-01 14:04:18,120 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-01 14:04:18,121 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-01 14:04:18,125 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-01 14:04:18,128 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-01 14:04:18,143 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-12-01 14:04:18,144 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3973d146-ee06-4895-8145-dfce43259522/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 [2018-12-01 14:04:18,155 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-01 14:04:18,155 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-01 14:04:18,158 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-01 14:04:18,158 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_3973d146-ee06-4895-8145-dfce43259522/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 [2018-12-01 14:04:18,174 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-01 14:04:18,174 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-01 14:04:18,176 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-01 14:04:18,176 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_3973d146-ee06-4895-8145-dfce43259522/bin-2019/uautomizer/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-01 14:04:18,191 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-01 14:04:18,191 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-01 14:04:18,192 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-01 14:04:18,192 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_3973d146-ee06-4895-8145-dfce43259522/bin-2019/uautomizer/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-01 14:04:18,207 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-01 14:04:18,207 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3973d146-ee06-4895-8145-dfce43259522/bin-2019/uautomizer/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-01 14:04:18,222 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-12-01 14:04:18,222 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-01 14:04:18,237 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-12-01 14:04:18,238 INFO L216 LassoAnalysis]: Preferences: [2018-12-01 14:04:18,238 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-12-01 14:04:18,239 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-12-01 14:04:18,239 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-12-01 14:04:18,239 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-12-01 14:04:18,239 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-01 14:04:18,239 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-12-01 14:04:18,239 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-12-01 14:04:18,239 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1d_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration4_Loop [2018-12-01 14:04:18,239 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-12-01 14:04:18,239 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-12-01 14:04:18,240 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-01 14:04:18,241 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-01 14:04:18,242 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-01 14:04:18,246 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-01 14:04:18,247 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-01 14:04:18,248 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-01 14:04:18,278 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-12-01 14:04:18,279 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-12-01 14:04:18,279 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 [2018-12-01 14:04:18,279 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-01 14:04:18,280 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-01 14:04:18,280 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-01 14:04:18,280 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-01 14:04:18,280 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-01 14:04:18,280 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-01 14:04:18,280 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-01 14:04:18,281 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-01 14:04:18,281 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 [2018-12-01 14:04:18,281 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-01 14:04:18,282 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-01 14:04:18,282 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-01 14:04:18,282 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-01 14:04:18,282 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-01 14:04:18,282 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-01 14:04:18,282 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-01 14:04:18,282 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-01 14:04:18,283 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 [2018-12-01 14:04:18,283 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-01 14:04:18,283 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-01 14:04:18,283 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-01 14:04:18,283 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-01 14:04:18,283 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-01 14:04:18,283 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-01 14:04:18,284 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-01 14:04:18,286 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-12-01 14:04:18,287 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2018-12-01 14:04:18,287 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2018-12-01 14:04:18,288 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-12-01 14:04:18,288 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-12-01 14:04:18,288 INFO L518 LassoAnalysis]: Proved termination. [2018-12-01 14:04:18,288 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] [2018-12-01 14:04:18,288 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-12-01 14:04:18,296 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 14:04:18,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 14:04:18,309 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 14:04:18,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 14:04:18,324 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 14:04:18,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 14:04:18,333 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 [2018-12-01 14:04:18,333 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 92 states and 143 transitions. cyclomatic complexity: 57 Second operand 5 states. [2018-12-01 14:04:18,380 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 92 states and 143 transitions. cyclomatic complexity: 57. Second operand 5 states. Result 132 states and 207 transitions. Complement of second has 14 states. [2018-12-01 14:04:18,380 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 [2018-12-01 14:04:18,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-12-01 14:04:18,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 17 transitions. [2018-12-01 14:04:18,381 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 17 transitions. Stem has 13 letters. Loop has 3 letters. [2018-12-01 14:04:18,381 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-01 14:04:18,381 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 17 transitions. Stem has 16 letters. Loop has 3 letters. [2018-12-01 14:04:18,381 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-01 14:04:18,381 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 17 transitions. Stem has 13 letters. Loop has 6 letters. [2018-12-01 14:04:18,381 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-01 14:04:18,381 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 132 states and 207 transitions. [2018-12-01 14:04:18,384 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2018-12-01 14:04:18,387 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 132 states to 120 states and 195 transitions. [2018-12-01 14:04:18,387 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 49 [2018-12-01 14:04:18,387 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 51 [2018-12-01 14:04:18,387 INFO L73 IsDeterministic]: Start isDeterministic. Operand 120 states and 195 transitions. [2018-12-01 14:04:18,387 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-12-01 14:04:18,388 INFO L705 BuchiCegarLoop]: Abstraction has 120 states and 195 transitions. [2018-12-01 14:04:18,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states and 195 transitions. [2018-12-01 14:04:18,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 116. [2018-12-01 14:04:18,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2018-12-01 14:04:18,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 185 transitions. [2018-12-01 14:04:18,398 INFO L728 BuchiCegarLoop]: Abstraction has 116 states and 185 transitions. [2018-12-01 14:04:18,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-01 14:04:18,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-12-01 14:04:18,398 INFO L87 Difference]: Start difference. First operand 116 states and 185 transitions. Second operand 6 states. [2018-12-01 14:04:18,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 14:04:18,421 INFO L93 Difference]: Finished difference Result 129 states and 195 transitions. [2018-12-01 14:04:18,422 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-01 14:04:18,422 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 129 states and 195 transitions. [2018-12-01 14:04:18,424 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 11 [2018-12-01 14:04:18,427 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 129 states to 127 states and 193 transitions. [2018-12-01 14:04:18,427 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 59 [2018-12-01 14:04:18,427 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 59 [2018-12-01 14:04:18,428 INFO L73 IsDeterministic]: Start isDeterministic. Operand 127 states and 193 transitions. [2018-12-01 14:04:18,428 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-12-01 14:04:18,428 INFO L705 BuchiCegarLoop]: Abstraction has 127 states and 193 transitions. [2018-12-01 14:04:18,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states and 193 transitions. [2018-12-01 14:04:18,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 104. [2018-12-01 14:04:18,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2018-12-01 14:04:18,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 157 transitions. [2018-12-01 14:04:18,437 INFO L728 BuchiCegarLoop]: Abstraction has 104 states and 157 transitions. [2018-12-01 14:04:18,437 INFO L608 BuchiCegarLoop]: Abstraction has 104 states and 157 transitions. [2018-12-01 14:04:18,437 INFO L442 BuchiCegarLoop]: ======== Iteration 5============ [2018-12-01 14:04:18,437 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 104 states and 157 transitions. [2018-12-01 14:04:18,438 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2018-12-01 14:04:18,438 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-12-01 14:04:18,438 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-12-01 14:04:18,439 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 14:04:18,439 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2018-12-01 14:04:18,439 INFO L794 eck$LassoCheckResult]: Stem: 1181#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; 1182#L25 call main_#t~ret6 := rec2(main_~x~0);< 1187#rec2ENTRY ~j := #in~j; 1200#L18 assume !(~j <= 0); 1150#L20 call #t~ret3 := rec1(~j);< 1199#rec1ENTRY ~i := #in~i; 1198#L12 assume !(~i <= 0); 1146#L14 call #t~ret0 := rec1(~i - 2);< 1196#rec1ENTRY ~i := #in~i; 1195#L12 assume !(~i <= 0); 1168#L14 call #t~ret0 := rec1(~i - 2);< 1194#rec1ENTRY ~i := #in~i; 1197#L12 assume ~i <= 0;#res := 0; 1213#rec1FINAL assume true; 1212#rec1EXIT >#27#return; 1139#L14-1 [2018-12-01 14:04:18,439 INFO L796 eck$LassoCheckResult]: Loop: 1139#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 1137#rec1ENTRY ~i := #in~i; 1140#L12 assume ~i <= 0;#res := 0; 1216#rec1FINAL assume true; 1207#rec1EXIT >#29#return; 1164#L14-2 call #t~ret2 := rec1(#t~ret1);< 1178#rec1ENTRY ~i := #in~i; 1210#L12 assume !(~i <= 0); 1162#L14 call #t~ret0 := rec1(~i - 2);< 1178#rec1ENTRY ~i := #in~i; 1210#L12 assume ~i <= 0;#res := 0; 1209#rec1FINAL assume true; 1208#rec1EXIT >#27#return; 1139#L14-1 [2018-12-01 14:04:18,439 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 14:04:18,439 INFO L82 PathProgramCache]: Analyzing trace with hash -377207200, now seen corresponding path program 1 times [2018-12-01 14:04:18,439 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 14:04:18,440 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 14:04:18,440 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 14:04:18,440 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 14:04:18,440 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 14:04:18,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-01 14:04:18,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-01 14:04:18,448 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 14:04:18,448 INFO L82 PathProgramCache]: Analyzing trace with hash 1306212703, now seen corresponding path program 1 times [2018-12-01 14:04:18,448 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 14:04:18,448 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 14:04:18,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 14:04:18,449 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 14:04:18,449 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 14:04:18,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 14:04:18,468 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-12-01 14:04:18,468 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 14:04:18,468 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3973d146-ee06-4895-8145-dfce43259522/bin-2019/uautomizer/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 14:04:18,476 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 14:04:18,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 14:04:18,481 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 14:04:18,484 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 14:04:18,505 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-12-01 14:04:18,505 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 6 [2018-12-01 14:04:18,506 INFO L811 eck$LassoCheckResult]: loop already infeasible [2018-12-01 14:04:18,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-01 14:04:18,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-12-01 14:04:18,506 INFO L87 Difference]: Start difference. First operand 104 states and 157 transitions. cyclomatic complexity: 59 Second operand 6 states. [2018-12-01 14:04:18,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 14:04:18,541 INFO L93 Difference]: Finished difference Result 119 states and 173 transitions. [2018-12-01 14:04:18,541 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-01 14:04:18,541 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 119 states and 173 transitions. [2018-12-01 14:04:18,543 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2018-12-01 14:04:18,545 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 119 states to 114 states and 164 transitions. [2018-12-01 14:04:18,546 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 50 [2018-12-01 14:04:18,546 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 50 [2018-12-01 14:04:18,546 INFO L73 IsDeterministic]: Start isDeterministic. Operand 114 states and 164 transitions. [2018-12-01 14:04:18,546 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-12-01 14:04:18,546 INFO L705 BuchiCegarLoop]: Abstraction has 114 states and 164 transitions. [2018-12-01 14:04:18,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states and 164 transitions. [2018-12-01 14:04:18,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 111. [2018-12-01 14:04:18,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2018-12-01 14:04:18,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 161 transitions. [2018-12-01 14:04:18,553 INFO L728 BuchiCegarLoop]: Abstraction has 111 states and 161 transitions. [2018-12-01 14:04:18,553 INFO L608 BuchiCegarLoop]: Abstraction has 111 states and 161 transitions. [2018-12-01 14:04:18,553 INFO L442 BuchiCegarLoop]: ======== Iteration 6============ [2018-12-01 14:04:18,553 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 111 states and 161 transitions. [2018-12-01 14:04:18,554 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2018-12-01 14:04:18,554 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-12-01 14:04:18,554 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-12-01 14:04:18,555 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [5, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 14:04:18,555 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2018-12-01 14:04:18,555 INFO L794 eck$LassoCheckResult]: Stem: 1455#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 1456#L25 call main_#t~ret6 := rec2(main_~x~0);< 1463#rec2ENTRY ~j := #in~j; 1485#L18 assume !(~j <= 0); 1465#L20 call #t~ret3 := rec1(~j);< 1478#rec1ENTRY ~i := #in~i; 1475#L12 assume !(~i <= 0); 1425#L14 call #t~ret0 := rec1(~i - 2);< 1472#rec1ENTRY ~i := #in~i; 1470#L12 assume !(~i <= 0); 1423#L14 call #t~ret0 := rec1(~i - 2);< 1469#rec1ENTRY ~i := #in~i; 1471#L12 assume ~i <= 0;#res := 0; 1489#rec1FINAL assume true; 1480#rec1EXIT >#27#return; 1432#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 1433#rec1ENTRY ~i := #in~i; 1492#L12 assume ~i <= 0;#res := 0; 1491#rec1FINAL assume true; 1490#rec1EXIT >#29#return; 1412#L14-2 call #t~ret2 := rec1(#t~ret1);< 1411#rec1ENTRY ~i := #in~i; 1413#L12 assume ~i <= 0;#res := 0; 1449#rec1FINAL assume true; 1451#rec1EXIT >#31#return; 1438#L14-3 #res := 1 + #t~ret2;havoc #t~ret1;havoc #t~ret2;havoc #t~ret0; 1418#rec1FINAL assume true; 1428#rec1EXIT >#27#return; 1427#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 1458#rec1ENTRY [2018-12-01 14:04:18,555 INFO L796 eck$LassoCheckResult]: Loop: 1458#rec1ENTRY ~i := #in~i; 1488#L12 assume !(~i <= 0); 1419#L14 call #t~ret0 := rec1(~i - 2);< 1458#rec1ENTRY [2018-12-01 14:04:18,555 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 14:04:18,555 INFO L82 PathProgramCache]: Analyzing trace with hash 1733863270, now seen corresponding path program 1 times [2018-12-01 14:04:18,555 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 14:04:18,555 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 14:04:18,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 14:04:18,556 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 14:04:18,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 14:04:18,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-01 14:04:18,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-01 14:04:18,568 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 14:04:18,568 INFO L82 PathProgramCache]: Analyzing trace with hash 29941, now seen corresponding path program 3 times [2018-12-01 14:04:18,568 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 14:04:18,568 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 14:04:18,569 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 14:04:18,569 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-01 14:04:18,569 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 14:04:18,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-01 14:04:18,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-01 14:04:18,571 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 14:04:18,571 INFO L82 PathProgramCache]: Analyzing trace with hash -2050992272, now seen corresponding path program 2 times [2018-12-01 14:04:18,572 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 14:04:18,572 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 14:04:18,572 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 14:04:18,572 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 14:04:18,572 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 14:04:18,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 14:04:18,613 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2018-12-01 14:04:18,614 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 14:04:18,614 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3973d146-ee06-4895-8145-dfce43259522/bin-2019/uautomizer/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 14:04:18,623 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-01 14:04:18,630 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-01 14:04:18,630 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 14:04:18,631 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 14:04:18,634 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2018-12-01 14:04:18,656 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 14:04:18,656 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-12-01 14:04:18,675 INFO L216 LassoAnalysis]: Preferences: [2018-12-01 14:04:18,675 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-12-01 14:04:18,675 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-12-01 14:04:18,675 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-12-01 14:04:18,675 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-12-01 14:04:18,675 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-01 14:04:18,675 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-12-01 14:04:18,676 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-12-01 14:04:18,676 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1d_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration6_Loop [2018-12-01 14:04:18,676 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-12-01 14:04:18,676 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-12-01 14:04:18,676 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-01 14:04:18,678 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-01 14:04:18,678 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-01 14:04:18,679 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-01 14:04:18,682 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-01 14:04:18,683 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-01 14:04:18,699 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-12-01 14:04:18,699 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3973d146-ee06-4895-8145-dfce43259522/bin-2019/uautomizer/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-01 14:04:18,701 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-01 14:04:18,701 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-01 14:04:18,703 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-01 14:04:18,703 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_3973d146-ee06-4895-8145-dfce43259522/bin-2019/uautomizer/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-01 14:04:18,718 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-01 14:04:18,718 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-01 14:04:18,720 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-01 14:04:18,720 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_3973d146-ee06-4895-8145-dfce43259522/bin-2019/uautomizer/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-01 14:04:18,734 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-01 14:04:18,734 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-01 14:04:18,736 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-01 14:04:18,736 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_3973d146-ee06-4895-8145-dfce43259522/bin-2019/uautomizer/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-01 14:04:18,751 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-01 14:04:18,751 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3973d146-ee06-4895-8145-dfce43259522/bin-2019/uautomizer/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-01 14:04:18,767 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-12-01 14:04:18,767 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-01 14:04:18,782 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-12-01 14:04:18,784 INFO L216 LassoAnalysis]: Preferences: [2018-12-01 14:04:18,784 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-12-01 14:04:18,784 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-12-01 14:04:18,784 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-12-01 14:04:18,784 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-12-01 14:04:18,784 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-01 14:04:18,785 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-12-01 14:04:18,785 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-12-01 14:04:18,785 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1d_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration6_Loop [2018-12-01 14:04:18,785 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-12-01 14:04:18,785 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-12-01 14:04:18,785 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-01 14:04:18,787 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-01 14:04:18,787 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-01 14:04:18,790 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-01 14:04:18,791 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-01 14:04:18,792 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-01 14:04:18,813 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-12-01 14:04:18,813 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-12-01 14:04:18,813 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 [2018-12-01 14:04:18,814 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-01 14:04:18,814 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-01 14:04:18,814 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-01 14:04:18,814 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-01 14:04:18,814 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-01 14:04:18,814 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-01 14:04:18,814 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-01 14:04:18,815 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-01 14:04:18,815 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 [2018-12-01 14:04:18,815 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-01 14:04:18,815 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-01 14:04:18,815 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-01 14:04:18,815 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-01 14:04:18,815 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-01 14:04:18,816 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-01 14:04:18,816 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-01 14:04:18,816 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-01 14:04:18,816 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 [2018-12-01 14:04:18,816 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-01 14:04:18,816 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-01 14:04:18,817 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-01 14:04:18,817 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-01 14:04:18,817 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-01 14:04:18,817 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-01 14:04:18,817 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-01 14:04:18,818 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-12-01 14:04:18,819 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2018-12-01 14:04:18,819 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2018-12-01 14:04:18,819 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-12-01 14:04:18,819 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-12-01 14:04:18,819 INFO L518 LassoAnalysis]: Proved termination. [2018-12-01 14:04:18,819 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] [2018-12-01 14:04:18,820 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-12-01 14:04:18,833 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 14:04:18,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 14:04:18,855 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 14:04:18,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 14:04:18,882 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 14:04:18,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 14:04:18,893 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 [2018-12-01 14:04:18,893 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 111 states and 161 transitions. cyclomatic complexity: 56 Second operand 5 states. [2018-12-01 14:04:18,919 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 111 states and 161 transitions. cyclomatic complexity: 56. Second operand 5 states. Result 128 states and 179 transitions. Complement of second has 7 states. [2018-12-01 14:04:18,919 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 [2018-12-01 14:04:18,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-12-01 14:04:18,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 15 transitions. [2018-12-01 14:04:18,919 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 15 transitions. Stem has 29 letters. Loop has 3 letters. [2018-12-01 14:04:18,920 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-01 14:04:18,920 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-12-01 14:04:18,936 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 14:04:18,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 14:04:18,955 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 14:04:18,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 14:04:18,979 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 14:04:18,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 14:04:18,989 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 [2018-12-01 14:04:18,989 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 111 states and 161 transitions. cyclomatic complexity: 56 Second operand 5 states. [2018-12-01 14:04:19,018 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 111 states and 161 transitions. cyclomatic complexity: 56. Second operand 5 states. Result 128 states and 179 transitions. Complement of second has 7 states. [2018-12-01 14:04:19,018 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 [2018-12-01 14:04:19,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-12-01 14:04:19,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 15 transitions. [2018-12-01 14:04:19,019 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 15 transitions. Stem has 29 letters. Loop has 3 letters. [2018-12-01 14:04:19,019 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-01 14:04:19,019 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-12-01 14:04:19,026 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 14:04:19,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 14:04:19,046 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 14:04:19,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 14:04:19,066 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 14:04:19,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 14:04:19,080 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 [2018-12-01 14:04:19,080 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 111 states and 161 transitions. cyclomatic complexity: 56 Second operand 5 states. [2018-12-01 14:04:19,139 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 111 states and 161 transitions. cyclomatic complexity: 56. Second operand 5 states. Result 156 states and 218 transitions. Complement of second has 13 states. [2018-12-01 14:04:19,140 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 [2018-12-01 14:04:19,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-12-01 14:04:19,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 24 transitions. [2018-12-01 14:04:19,140 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 24 transitions. Stem has 29 letters. Loop has 3 letters. [2018-12-01 14:04:19,140 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-01 14:04:19,140 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 24 transitions. Stem has 32 letters. Loop has 3 letters. [2018-12-01 14:04:19,140 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-01 14:04:19,140 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 24 transitions. Stem has 29 letters. Loop has 6 letters. [2018-12-01 14:04:19,141 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-01 14:04:19,141 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 156 states and 218 transitions. [2018-12-01 14:04:19,142 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 15 [2018-12-01 14:04:19,143 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 156 states to 138 states and 200 transitions. [2018-12-01 14:04:19,143 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 54 [2018-12-01 14:04:19,143 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 57 [2018-12-01 14:04:19,144 INFO L73 IsDeterministic]: Start isDeterministic. Operand 138 states and 200 transitions. [2018-12-01 14:04:19,144 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-12-01 14:04:19,144 INFO L705 BuchiCegarLoop]: Abstraction has 138 states and 200 transitions. [2018-12-01 14:04:19,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states and 200 transitions. [2018-12-01 14:04:19,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 119. [2018-12-01 14:04:19,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-12-01 14:04:19,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 169 transitions. [2018-12-01 14:04:19,148 INFO L728 BuchiCegarLoop]: Abstraction has 119 states and 169 transitions. [2018-12-01 14:04:19,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-01 14:04:19,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2018-12-01 14:04:19,148 INFO L87 Difference]: Start difference. First operand 119 states and 169 transitions. Second operand 8 states. [2018-12-01 14:04:19,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 14:04:19,194 INFO L93 Difference]: Finished difference Result 97 states and 115 transitions. [2018-12-01 14:04:19,194 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-12-01 14:04:19,194 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 97 states and 115 transitions. [2018-12-01 14:04:19,195 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2018-12-01 14:04:19,195 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 97 states to 62 states and 74 transitions. [2018-12-01 14:04:19,195 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 11 [2018-12-01 14:04:19,195 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 11 [2018-12-01 14:04:19,195 INFO L73 IsDeterministic]: Start isDeterministic. Operand 62 states and 74 transitions. [2018-12-01 14:04:19,195 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-12-01 14:04:19,195 INFO L705 BuchiCegarLoop]: Abstraction has 62 states and 74 transitions. [2018-12-01 14:04:19,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states and 74 transitions. [2018-12-01 14:04:19,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 53. [2018-12-01 14:04:19,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-12-01 14:04:19,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 64 transitions. [2018-12-01 14:04:19,198 INFO L728 BuchiCegarLoop]: Abstraction has 53 states and 64 transitions. [2018-12-01 14:04:19,198 INFO L608 BuchiCegarLoop]: Abstraction has 53 states and 64 transitions. [2018-12-01 14:04:19,198 INFO L442 BuchiCegarLoop]: ======== Iteration 7============ [2018-12-01 14:04:19,198 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 53 states and 64 transitions. [2018-12-01 14:04:19,198 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2018-12-01 14:04:19,199 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-12-01 14:04:19,199 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-12-01 14:04:19,199 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-01 14:04:19,199 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2018-12-01 14:04:19,200 INFO L794 eck$LassoCheckResult]: Stem: 2631#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 2602#L25 call main_#t~ret6 := rec2(main_~x~0);< 2601#rec2ENTRY ~j := #in~j; 2603#L18 assume !(~j <= 0); 2633#L20 call #t~ret3 := rec1(~j);< 2651#rec1ENTRY ~i := #in~i; 2649#L12 assume !(~i <= 0); 2621#L14 call #t~ret0 := rec1(~i - 2);< 2647#rec1ENTRY ~i := #in~i; 2650#L12 assume ~i <= 0;#res := 0; 2648#rec1FINAL assume true; 2629#rec1EXIT >#27#return; 2630#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 2622#rec1ENTRY ~i := #in~i; 2645#L12 assume ~i <= 0;#res := 0; 2643#rec1FINAL assume true; 2639#rec1EXIT >#29#return; 2638#L14-2 call #t~ret2 := rec1(#t~ret1);< 2628#rec1ENTRY ~i := #in~i; 2641#L12 assume ~i <= 0;#res := 0; 2640#rec1FINAL assume true; 2637#rec1EXIT >#31#return; 2636#L14-3 #res := 1 + #t~ret2;havoc #t~ret1;havoc #t~ret2;havoc #t~ret0; 2635#rec1FINAL assume true; 2634#rec1EXIT >#33#return; 2605#L20-1 call #t~ret4 := rec2(#t~ret3 - 1);< 2604#rec2ENTRY ~j := #in~j; 2607#L18 assume !(~j <= 0); 2611#L20 call #t~ret3 := rec1(~j);< 2608#rec1ENTRY [2018-12-01 14:04:19,200 INFO L796 eck$LassoCheckResult]: Loop: 2608#rec1ENTRY ~i := #in~i; 2610#L12 assume !(~i <= 0); 2609#L14 call #t~ret0 := rec1(~i - 2);< 2608#rec1ENTRY [2018-12-01 14:04:19,200 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 14:04:19,200 INFO L82 PathProgramCache]: Analyzing trace with hash -1852176490, now seen corresponding path program 2 times [2018-12-01 14:04:19,200 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 14:04:19,200 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 14:04:19,200 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 14:04:19,200 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 14:04:19,201 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 14:04:19,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 14:04:19,231 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-12-01 14:04:19,231 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-01 14:04:19,231 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3973d146-ee06-4895-8145-dfce43259522/bin-2019/uautomizer/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-01 14:04:19,237 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-01 14:04:19,242 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-01 14:04:19,242 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-01 14:04:19,243 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 14:04:19,247 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-12-01 14:04:19,263 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-12-01 14:04:19,263 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-12-01 14:04:19,263 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-12-01 14:04:19,263 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 14:04:19,263 INFO L82 PathProgramCache]: Analyzing trace with hash 29941, now seen corresponding path program 4 times [2018-12-01 14:04:19,263 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-12-01 14:04:19,263 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-12-01 14:04:19,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 14:04:19,264 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-01 14:04:19,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-01 14:04:19,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-01 14:04:19,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-01 14:04:19,284 INFO L216 LassoAnalysis]: Preferences: [2018-12-01 14:04:19,284 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-12-01 14:04:19,284 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-12-01 14:04:19,284 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-12-01 14:04:19,284 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-12-01 14:04:19,284 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-01 14:04:19,284 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-12-01 14:04:19,284 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-12-01 14:04:19,284 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1d_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration7_Loop [2018-12-01 14:04:19,284 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-12-01 14:04:19,284 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-12-01 14:04:19,285 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-01 14:04:19,286 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-01 14:04:19,287 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-01 14:04:19,288 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-01 14:04:19,288 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-01 14:04:19,291 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-01 14:04:19,301 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-12-01 14:04:19,301 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3973d146-ee06-4895-8145-dfce43259522/bin-2019/uautomizer/z3 Starting monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-01 14:04:19,303 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-01 14:04:19,303 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-01 14:04:19,305 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-01 14:04:19,305 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_3973d146-ee06-4895-8145-dfce43259522/bin-2019/uautomizer/z3 Starting monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-01 14:04:19,320 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-01 14:04:19,320 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-01 14:04:19,322 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-01 14:04:19,322 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_3973d146-ee06-4895-8145-dfce43259522/bin-2019/uautomizer/z3 Starting monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-01 14:04:19,337 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-01 14:04:19,337 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-01 14:04:19,339 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-01 14:04:19,339 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_3973d146-ee06-4895-8145-dfce43259522/bin-2019/uautomizer/z3 Starting monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-01 14:04:19,354 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-01 14:04:19,354 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-01 14:04:19,356 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-12-01 14:04:19,356 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_3973d146-ee06-4895-8145-dfce43259522/bin-2019/uautomizer/z3 Starting monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-01 14:04:19,370 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-12-01 14:04:19,371 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_3973d146-ee06-4895-8145-dfce43259522/bin-2019/uautomizer/z3 Starting monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-01 14:04:19,387 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-12-01 14:04:19,387 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-12-01 14:04:19,402 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-12-01 14:04:19,404 INFO L216 LassoAnalysis]: Preferences: [2018-12-01 14:04:19,404 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-12-01 14:04:19,404 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-12-01 14:04:19,404 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-12-01 14:04:19,404 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-12-01 14:04:19,404 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-12-01 14:04:19,404 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-12-01 14:04:19,404 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-12-01 14:04:19,404 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1d_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration7_Loop [2018-12-01 14:04:19,404 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-12-01 14:04:19,404 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-12-01 14:04:19,405 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-01 14:04:19,406 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-01 14:04:19,407 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-01 14:04:19,407 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-01 14:04:19,408 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-01 14:04:19,411 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-12-01 14:04:19,432 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-12-01 14:04:19,432 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-12-01 14:04:19,433 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 [2018-12-01 14:04:19,433 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-01 14:04:19,433 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-01 14:04:19,433 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-01 14:04:19,433 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-01 14:04:19,433 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-01 14:04:19,433 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-01 14:04:19,433 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-01 14:04:19,434 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-01 14:04:19,434 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 [2018-12-01 14:04:19,434 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-01 14:04:19,434 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-01 14:04:19,434 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-01 14:04:19,434 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-01 14:04:19,435 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-01 14:04:19,435 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-01 14:04:19,435 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-01 14:04:19,435 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-01 14:04:19,435 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 [2018-12-01 14:04:19,435 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-01 14:04:19,436 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-01 14:04:19,436 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-01 14:04:19,436 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-01 14:04:19,436 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-01 14:04:19,436 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-01 14:04:19,436 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-01 14:04:19,436 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-01 14:04:19,437 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 [2018-12-01 14:04:19,437 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-01 14:04:19,437 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-01 14:04:19,437 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-01 14:04:19,437 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-01 14:04:19,437 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-01 14:04:19,437 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-01 14:04:19,437 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-01 14:04:19,438 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-12-01 14:04:19,438 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 [2018-12-01 14:04:19,438 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-12-01 14:04:19,438 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-12-01 14:04:19,438 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-12-01 14:04:19,439 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-12-01 14:04:19,439 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-12-01 14:04:19,439 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-12-01 14:04:19,439 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-12-01 14:04:19,441 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-12-01 14:04:19,442 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2018-12-01 14:04:19,442 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2018-12-01 14:04:19,442 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-12-01 14:04:19,442 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-12-01 14:04:19,442 INFO L518 LassoAnalysis]: Proved termination. [2018-12-01 14:04:19,443 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] [2018-12-01 14:04:19,443 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-12-01 14:04:19,472 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 14:04:19,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 14:04:19,493 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 14:04:19,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 14:04:19,518 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 14:04:19,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 14:04:19,528 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 [2018-12-01 14:04:19,528 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 53 states and 64 transitions. cyclomatic complexity: 15 Second operand 5 states. [2018-12-01 14:04:19,569 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 53 states and 64 transitions. cyclomatic complexity: 15. Second operand 5 states. Result 63 states and 75 transitions. Complement of second has 13 states. [2018-12-01 14:04:19,570 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 [2018-12-01 14:04:19,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-12-01 14:04:19,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 10 transitions. [2018-12-01 14:04:19,570 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 10 transitions. Stem has 29 letters. Loop has 3 letters. [2018-12-01 14:04:19,570 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-01 14:04:19,570 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-12-01 14:04:19,577 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 14:04:19,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 14:04:19,599 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 14:04:19,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 14:04:19,616 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 14:04:19,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 14:04:19,629 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 [2018-12-01 14:04:19,629 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 53 states and 64 transitions. cyclomatic complexity: 15 Second operand 5 states. [2018-12-01 14:04:19,670 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 53 states and 64 transitions. cyclomatic complexity: 15. Second operand 5 states. Result 63 states and 75 transitions. Complement of second has 13 states. [2018-12-01 14:04:19,671 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 [2018-12-01 14:04:19,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-12-01 14:04:19,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 10 transitions. [2018-12-01 14:04:19,671 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 10 transitions. Stem has 29 letters. Loop has 3 letters. [2018-12-01 14:04:19,671 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-01 14:04:19,671 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-12-01 14:04:19,684 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-01 14:04:19,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 14:04:19,711 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 14:04:19,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-01 14:04:19,731 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-01 14:04:19,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-01 14:04:19,740 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 [2018-12-01 14:04:19,740 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 53 states and 64 transitions. cyclomatic complexity: 15 Second operand 5 states. [2018-12-01 14:04:19,786 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 53 states and 64 transitions. cyclomatic complexity: 15. Second operand 5 states. Result 77 states and 89 transitions. Complement of second has 13 states. [2018-12-01 14:04:19,786 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 [2018-12-01 14:04:19,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-12-01 14:04:19,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 24 transitions. [2018-12-01 14:04:19,787 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 24 transitions. Stem has 29 letters. Loop has 3 letters. [2018-12-01 14:04:19,787 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-01 14:04:19,787 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 24 transitions. Stem has 32 letters. Loop has 3 letters. [2018-12-01 14:04:19,787 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-01 14:04:19,787 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 24 transitions. Stem has 29 letters. Loop has 6 letters. [2018-12-01 14:04:19,787 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-12-01 14:04:19,787 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 77 states and 89 transitions. [2018-12-01 14:04:19,788 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2018-12-01 14:04:19,788 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 77 states to 0 states and 0 transitions. [2018-12-01 14:04:19,788 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2018-12-01 14:04:19,788 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2018-12-01 14:04:19,788 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2018-12-01 14:04:19,788 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2018-12-01 14:04:19,788 INFO L705 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-01 14:04:19,788 INFO L728 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-01 14:04:19,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-12-01 14:04:19,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2018-12-01 14:04:19,788 INFO L87 Difference]: Start difference. First operand 0 states and 0 transitions. Second operand 8 states. [2018-12-01 14:04:19,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-01 14:04:19,788 INFO L93 Difference]: Finished difference Result 0 states and 0 transitions. [2018-12-01 14:04:19,788 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2018-12-01 14:04:19,789 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 0 states and 0 transitions. [2018-12-01 14:04:19,789 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2018-12-01 14:04:19,789 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 0 states to 0 states and 0 transitions. [2018-12-01 14:04:19,789 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2018-12-01 14:04:19,789 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2018-12-01 14:04:19,789 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2018-12-01 14:04:19,789 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2018-12-01 14:04:19,789 INFO L705 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-01 14:04:19,789 INFO L728 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-01 14:04:19,789 INFO L608 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-01 14:04:19,789 INFO L442 BuchiCegarLoop]: ======== Iteration 8============ [2018-12-01 14:04:19,789 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2018-12-01 14:04:19,789 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2018-12-01 14:04:19,789 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2018-12-01 14:04:19,793 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 01.12 02:04:19 BoogieIcfgContainer [2018-12-01 14:04:19,793 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2018-12-01 14:04:19,793 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-01 14:04:19,793 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-01 14:04:19,793 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-01 14:04:19,794 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 02:04:16" (3/4) ... [2018-12-01 14:04:19,796 INFO L147 WitnessPrinter]: No result that supports witness generation found [2018-12-01 14:04:19,796 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-01 14:04:19,796 INFO L168 Benchmark]: Toolchain (without parser) took 3500.99 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 319.8 MB). Free memory was 957.1 MB in the beginning and 1.3 GB in the end (delta: -329.1 MB). There was no memory consumed. Max. memory is 11.5 GB. [2018-12-01 14:04:19,797 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 976.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-01 14:04:19,797 INFO L168 Benchmark]: CACSL2BoogieTranslator took 131.59 ms. Allocated memory is still 1.0 GB. Free memory was 957.1 MB in the beginning and 946.3 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-12-01 14:04:19,798 INFO L168 Benchmark]: Boogie Procedure Inliner took 18.22 ms. Allocated memory is still 1.0 GB. Free memory is still 946.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-01 14:04:19,798 INFO L168 Benchmark]: Boogie Preprocessor took 9.04 ms. Allocated memory is still 1.0 GB. Free memory was 946.3 MB in the beginning and 941.0 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2018-12-01 14:04:19,798 INFO L168 Benchmark]: RCFGBuilder took 140.38 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 136.8 MB). Free memory was 941.0 MB in the beginning and 1.1 GB in the end (delta: -175.9 MB). Peak memory consumption was 13.3 MB. Max. memory is 11.5 GB. [2018-12-01 14:04:19,798 INFO L168 Benchmark]: BuchiAutomizer took 3196.51 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 183.0 MB). Free memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: -169.3 MB). Peak memory consumption was 13.7 MB. Max. memory is 11.5 GB. [2018-12-01 14:04:19,799 INFO L168 Benchmark]: Witness Printer took 2.63 ms. Allocated memory is still 1.3 GB. Free memory is still 1.3 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-01 14:04:19,800 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 976.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 131.59 ms. Allocated memory is still 1.0 GB. Free memory was 957.1 MB in the beginning and 946.3 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 18.22 ms. Allocated memory is still 1.0 GB. Free memory is still 946.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 9.04 ms. Allocated memory is still 1.0 GB. Free memory was 946.3 MB in the beginning and 941.0 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 140.38 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 136.8 MB). Free memory was 941.0 MB in the beginning and 1.1 GB in the end (delta: -175.9 MB). Peak memory consumption was 13.3 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 3196.51 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 183.0 MB). Free memory was 1.1 GB in the beginning and 1.3 GB in the end (delta: -169.3 MB). Peak memory consumption was 13.7 MB. Max. memory is 11.5 GB. * Witness Printer took 2.63 ms. Allocated memory is still 1.3 GB. Free memory is still 1.3 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 10 terminating modules (5 trivial, 3 deterministic, 2 nondeterministic). One deterministic module has affine ranking function \old(j) and consists of 10 locations. One deterministic module has affine ranking function \old(i) and consists of 4 locations. One deterministic module has affine ranking function \old(i) and consists of 5 locations. One nondeterministic module has affine ranking function \old(i) and consists of 5 locations. One nondeterministic module has affine ranking function \old(i) and consists of 5 locations. 5 modules have a trivial ranking function, the largest among these consists of 8 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 3.1s and 8 iterations. TraceHistogramMax:5. Analysis of lassos took 1.5s. Construction of modules took 0.2s. Büchi inclusion checks took 1.1s. Highest rank in rank-based complementation 3. Minimization of det autom 3. Minimization of nondet autom 7. Automata minimization 0.0s AutomataMinimizationTime, 8 MinimizatonAttempts, 89 StatesRemovedByMinimization, 7 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 111 states and ocurred in iteration 5. Nontrivial modules had stage [3, 0, 2, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 22/24 HoareTripleCheckerStatistics: 188 SDtfs, 186 SDslu, 311 SDs, 0 SdLazy, 306 SolverSat, 135 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time LassoAnalysisResults: nont0 unkn0 SFLI2 SFLT2 conc0 concLT2 SILN0 SILU0 SILI0 SILT1 lasso0 LassoPreprocessingBenchmarks: Lassos: inital10 mio100 ax100 hnf100 lsp100 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq155 hnf93 smp100 dnf100 smp100 tf113 neg100 sie111 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 5ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 18 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 5 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.2s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...