./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/termination-crafted/NestedRecursion_1b_true-no-overflow_true-termination_true-valid-memsafety.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 0cd3be1d Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_e51f2ea7-ac65-4382-8229-579806de65b8/bin-2019/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_e51f2ea7-ac65-4382-8229-579806de65b8/bin-2019/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_e51f2ea7-ac65-4382-8229-579806de65b8/bin-2019/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_e51f2ea7-ac65-4382-8229-579806de65b8/bin-2019/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-crafted/NestedRecursion_1b_true-no-overflow_true-termination_true-valid-memsafety.c -s /tmp/vcloud-vcloud-master/worker/working_dir_e51f2ea7-ac65-4382-8229-579806de65b8/bin-2019/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_e51f2ea7-ac65-4382-8229-579806de65b8/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 cb528549fa76ae8087cf7043645dfa20323a0116 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-0cd3be1 [2018-11-28 11:34:20,547 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-28 11:34:20,548 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-28 11:34:20,556 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-28 11:34:20,556 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-28 11:34:20,557 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-28 11:34:20,558 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-28 11:34:20,559 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-28 11:34:20,560 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-28 11:34:20,561 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-28 11:34:20,562 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-28 11:34:20,562 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-28 11:34:20,562 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-28 11:34:20,563 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-28 11:34:20,564 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-28 11:34:20,565 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-28 11:34:20,565 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-28 11:34:20,566 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-28 11:34:20,568 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-28 11:34:20,569 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-28 11:34:20,570 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-28 11:34:20,571 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-28 11:34:20,573 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-28 11:34:20,573 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-28 11:34:20,573 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-28 11:34:20,574 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-28 11:34:20,575 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-28 11:34:20,575 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-28 11:34:20,576 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-28 11:34:20,577 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-28 11:34:20,577 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-28 11:34:20,578 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-28 11:34:20,578 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-28 11:34:20,578 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-28 11:34:20,579 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-28 11:34:20,579 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-28 11:34:20,580 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_e51f2ea7-ac65-4382-8229-579806de65b8/bin-2019/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf [2018-11-28 11:34:20,591 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-28 11:34:20,591 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-28 11:34:20,592 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-11-28 11:34:20,592 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-11-28 11:34:20,592 INFO L133 SettingsManager]: * Use SBE=true [2018-11-28 11:34:20,592 INFO L131 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2018-11-28 11:34:20,593 INFO L133 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2018-11-28 11:34:20,593 INFO L133 SettingsManager]: * Use old map elimination=false [2018-11-28 11:34:20,593 INFO L133 SettingsManager]: * Use external solver (rank synthesis)=false [2018-11-28 11:34:20,593 INFO L133 SettingsManager]: * Use only trivial implications for array writes=true [2018-11-28 11:34:20,594 INFO L133 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2018-11-28 11:34:20,594 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-28 11:34:20,594 INFO L133 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2018-11-28 11:34:20,594 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-28 11:34:20,594 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-28 11:34:20,594 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2018-11-28 11:34:20,594 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2018-11-28 11:34:20,595 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2018-11-28 11:34:20,595 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-28 11:34:20,595 INFO L133 SettingsManager]: * Assume nondeterminstic values are in range=false [2018-11-28 11:34:20,595 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-28 11:34:20,595 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2018-11-28 11:34:20,595 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-28 11:34:20,595 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-28 11:34:20,596 INFO L133 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2018-11-28 11:34:20,596 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-28 11:34:20,596 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-11-28 11:34:20,596 INFO L133 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2018-11-28 11:34:20,597 INFO L131 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2018-11-28 11:34:20,597 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_e51f2ea7-ac65-4382-8229-579806de65b8/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 -> cb528549fa76ae8087cf7043645dfa20323a0116 [2018-11-28 11:34:20,621 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-28 11:34:20,630 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-28 11:34:20,632 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-28 11:34:20,633 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-28 11:34:20,633 INFO L276 PluginConnector]: CDTParser initialized [2018-11-28 11:34:20,633 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_e51f2ea7-ac65-4382-8229-579806de65b8/bin-2019/uautomizer/../../sv-benchmarks/c/termination-crafted/NestedRecursion_1b_true-no-overflow_true-termination_true-valid-memsafety.c [2018-11-28 11:34:20,669 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_e51f2ea7-ac65-4382-8229-579806de65b8/bin-2019/uautomizer/data/bba83f9c8/2cd6475579ed48cba0d58fe5c09ad749/FLAG84c0c5bd9 [2018-11-28 11:34:21,075 INFO L307 CDTParser]: Found 1 translation units. [2018-11-28 11:34:21,076 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_e51f2ea7-ac65-4382-8229-579806de65b8/sv-benchmarks/c/termination-crafted/NestedRecursion_1b_true-no-overflow_true-termination_true-valid-memsafety.c [2018-11-28 11:34:21,080 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_e51f2ea7-ac65-4382-8229-579806de65b8/bin-2019/uautomizer/data/bba83f9c8/2cd6475579ed48cba0d58fe5c09ad749/FLAG84c0c5bd9 [2018-11-28 11:34:21,090 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_e51f2ea7-ac65-4382-8229-579806de65b8/bin-2019/uautomizer/data/bba83f9c8/2cd6475579ed48cba0d58fe5c09ad749 [2018-11-28 11:34:21,092 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-28 11:34:21,092 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-28 11:34:21,093 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-28 11:34:21,093 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-28 11:34:21,095 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-28 11:34:21,096 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 11:34:21" (1/1) ... [2018-11-28 11:34:21,098 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3426e3ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:34:21, skipping insertion in model container [2018-11-28 11:34:21,098 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 11:34:21" (1/1) ... [2018-11-28 11:34:21,102 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-28 11:34:21,112 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-28 11:34:21,208 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-11-28 11:34:21,211 INFO L191 MainTranslator]: Completed pre-run [2018-11-28 11:34:21,220 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-11-28 11:34:21,229 INFO L195 MainTranslator]: Completed translation [2018-11-28 11:34:21,229 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:34:21 WrapperNode [2018-11-28 11:34:21,229 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-28 11:34:21,230 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-28 11:34:21,230 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-28 11:34:21,230 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-28 11:34:21,235 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:34:21" (1/1) ... [2018-11-28 11:34:21,238 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:34:21" (1/1) ... [2018-11-28 11:34:21,248 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-28 11:34:21,248 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-28 11:34:21,248 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-28 11:34:21,248 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-28 11:34:21,253 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:34:21" (1/1) ... [2018-11-28 11:34:21,253 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:34:21" (1/1) ... [2018-11-28 11:34:21,254 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:34:21" (1/1) ... [2018-11-28 11:34:21,254 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:34:21" (1/1) ... [2018-11-28 11:34:21,255 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:34:21" (1/1) ... [2018-11-28 11:34:21,256 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:34:21" (1/1) ... [2018-11-28 11:34:21,257 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:34:21" (1/1) ... [2018-11-28 11:34:21,257 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-28 11:34:21,257 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-28 11:34:21,257 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-28 11:34:21,258 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-28 11:34:21,258 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:34:21" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e51f2ea7-ac65-4382-8229-579806de65b8/bin-2019/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:34:21,327 INFO L130 BoogieDeclarations]: Found specification of procedure rec1 [2018-11-28 11:34:21,327 INFO L138 BoogieDeclarations]: Found implementation of procedure rec1 [2018-11-28 11:34:21,327 INFO L130 BoogieDeclarations]: Found specification of procedure rec2 [2018-11-28 11:34:21,327 INFO L138 BoogieDeclarations]: Found implementation of procedure rec2 [2018-11-28 11:34:21,327 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-28 11:34:21,328 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-28 11:34:21,416 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-28 11:34:21,416 INFO L280 CfgBuilder]: Removed 4 assue(true) statements. [2018-11-28 11:34:21,416 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 11:34:21 BoogieIcfgContainer [2018-11-28 11:34:21,416 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-28 11:34:21,417 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2018-11-28 11:34:21,417 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2018-11-28 11:34:21,420 INFO L276 PluginConnector]: BuchiAutomizer initialized [2018-11-28 11:34:21,420 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-11-28 11:34:21,420 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 28.11 11:34:21" (1/3) ... [2018-11-28 11:34:21,421 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@2e6f900 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 28.11 11:34:21, skipping insertion in model container [2018-11-28 11:34:21,421 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-11-28 11:34:21,421 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:34:21" (2/3) ... [2018-11-28 11:34:21,422 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@2e6f900 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 28.11 11:34:21, skipping insertion in model container [2018-11-28 11:34:21,422 INFO L102 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2018-11-28 11:34:21,422 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 11:34:21" (3/3) ... [2018-11-28 11:34:21,423 INFO L375 chiAutomizerObserver]: Analyzing ICFG NestedRecursion_1b_true-no-overflow_true-termination_true-valid-memsafety.c [2018-11-28 11:34:21,467 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-28 11:34:21,467 INFO L374 BuchiCegarLoop]: Interprodecural is true [2018-11-28 11:34:21,467 INFO L375 BuchiCegarLoop]: Hoare is false [2018-11-28 11:34:21,467 INFO L376 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2018-11-28 11:34:21,467 INFO L377 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-28 11:34:21,467 INFO L378 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-28 11:34:21,468 INFO L379 BuchiCegarLoop]: Difference is false [2018-11-28 11:34:21,468 INFO L380 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-28 11:34:21,468 INFO L383 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2018-11-28 11:34:21,476 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 21 states. [2018-11-28 11:34:21,491 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2018-11-28 11:34:21,491 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-28 11:34:21,492 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-28 11:34:21,499 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2018-11-28 11:34:21,499 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 11:34:21,499 INFO L442 BuchiCegarLoop]: ======== Iteration 1============ [2018-11-28 11:34:21,499 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 21 states. [2018-11-28 11:34:21,501 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2018-11-28 11:34:21,501 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-28 11:34:21,501 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-28 11:34:21,502 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2018-11-28 11:34:21,502 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 11:34:21,510 INFO L794 eck$LassoCheckResult]: Stem: 13#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 22#L25true call main_#t~ret6 := rec2(main_~x~0);< 3#rec2ENTRYtrue [2018-11-28 11:34:21,511 INFO L796 eck$LassoCheckResult]: Loop: 3#rec2ENTRYtrue ~j := #in~j; 20#L18true assume !(~j <= 0); 18#L20true call #t~ret3 := rec1(~j - 1);< 4#rec1ENTRYtrue ~i := #in~i; 9#L12true assume ~i <= 0;#res := 0; 5#rec1FINALtrue assume true; 12#rec1EXITtrue >#33#return; 23#L20-1true call #t~ret4 := rec2(#t~ret3);< 3#rec2ENTRYtrue [2018-11-28 11:34:21,515 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:34:21,515 INFO L82 PathProgramCache]: Analyzing trace with hash 1617, now seen corresponding path program 1 times [2018-11-28 11:34:21,516 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:34:21,517 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:34:21,552 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:34:21,552 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 11:34:21,553 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:34:21,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:34:21,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:34:21,577 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:34:21,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1102838740, now seen corresponding path program 1 times [2018-11-28 11:34:21,578 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:34:21,578 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:34:21,578 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:34:21,579 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 11:34:21,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:34:21,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:34:21,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:34:21,593 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:34:21,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1371489668, now seen corresponding path program 1 times [2018-11-28 11:34:21,593 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:34:21,593 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:34:21,594 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:34:21,594 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 11:34:21,595 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:34:21,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:34:21,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:34:21,736 INFO L216 LassoAnalysis]: Preferences: [2018-11-28 11:34:21,737 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-28 11:34:21,737 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-28 11:34:21,737 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-28 11:34:21,737 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-28 11:34:21,738 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:34:21,738 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-28 11:34:21,738 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-28 11:34:21,738 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration1_Loop [2018-11-28 11:34:21,738 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-28 11:34:21,738 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-28 11:34:21,755 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:34:21,760 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:34:21,762 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:34:21,765 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:34:21,766 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:34:21,816 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-28 11:34:21,817 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e51f2ea7-ac65-4382-8229-579806de65b8/bin-2019/uautomizer/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:34:21,821 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:34:21,821 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:34:21,828 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:34:21,828 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_e51f2ea7-ac65-4382-8229-579806de65b8/bin-2019/uautomizer/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:34:21,853 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:34:21,853 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:34:21,860 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:34:21,860 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_e51f2ea7-ac65-4382-8229-579806de65b8/bin-2019/uautomizer/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:34:21,876 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:34:21,876 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:34:21,878 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:34:21,878 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_e51f2ea7-ac65-4382-8229-579806de65b8/bin-2019/uautomizer/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:34:21,893 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:34:21,893 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:34:21,895 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:34:21,895 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_e51f2ea7-ac65-4382-8229-579806de65b8/bin-2019/uautomizer/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:34:21,910 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:34:21,910 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e51f2ea7-ac65-4382-8229-579806de65b8/bin-2019/uautomizer/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:34:21,926 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-28 11:34:21,926 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:34:21,936 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-28 11:34:21,949 INFO L216 LassoAnalysis]: Preferences: [2018-11-28 11:34:21,950 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-28 11:34:21,950 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-28 11:34:21,950 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-28 11:34:21,950 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-28 11:34:21,950 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:34:21,950 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-28 11:34:21,950 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-28 11:34:21,950 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration1_Loop [2018-11-28 11:34:21,950 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-28 11:34:21,950 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-28 11:34:21,951 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:34:21,953 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:34:21,954 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:34:21,955 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:34:21,970 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:34:21,994 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-28 11:34:21,999 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-28 11:34:22,000 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 11:34:22,001 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 11:34:22,001 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 11:34:22,002 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 11:34:22,002 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 11:34:22,002 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 11:34:22,004 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 11:34:22,004 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 11:34:22,007 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 11:34:22,008 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 11:34:22,008 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 11:34:22,008 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 11:34:22,009 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 11:34:22,009 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 11:34:22,009 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 11:34:22,009 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 11:34:22,009 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 11:34:22,011 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 11:34:22,011 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 11:34:22,011 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 11:34:22,012 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 11:34:22,012 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 11:34:22,012 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 11:34:22,012 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 11:34:22,012 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 11:34:22,013 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 11:34:22,014 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 11:34:22,014 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 11:34:22,014 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 11:34:22,015 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 11:34:22,015 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 11:34:22,015 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 11:34:22,015 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 11:34:22,016 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 11:34:22,016 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 11:34:22,020 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-28 11:34:22,024 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-11-28 11:34:22,024 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-11-28 11:34:22,026 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-28 11:34:22,026 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-28 11:34:22,026 INFO L518 LassoAnalysis]: Proved termination. [2018-11-28 11:34:22,026 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec2_#in~j) = 1*rec2_#in~j Supporting invariants [] [2018-11-28 11:34:22,027 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-28 11:34:22,041 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:34:22,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:34:22,057 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 11:34:22,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:34:22,081 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 11:34:22,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 11:34:22,154 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 6 loop predicates [2018-11-28 11:34:22,155 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 21 states. Second operand 7 states. [2018-11-28 11:34:22,561 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 21 states.. Second operand 7 states. Result 194 states and 279 transitions. Complement of second has 61 states. [2018-11-28 11:34:22,561 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 11 states 1 stem states 9 non-accepting loop states 1 accepting loop states [2018-11-28 11:34:22,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-11-28 11:34:22,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 57 transitions. [2018-11-28 11:34:22,565 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 57 transitions. Stem has 2 letters. Loop has 8 letters. [2018-11-28 11:34:22,567 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 11:34:22,567 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 57 transitions. Stem has 10 letters. Loop has 8 letters. [2018-11-28 11:34:22,567 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 11:34:22,567 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 57 transitions. Stem has 2 letters. Loop has 16 letters. [2018-11-28 11:34:22,568 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 11:34:22,568 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 194 states and 279 transitions. [2018-11-28 11:34:22,577 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2018-11-28 11:34:22,583 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 194 states to 82 states and 120 transitions. [2018-11-28 11:34:22,584 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 35 [2018-11-28 11:34:22,585 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 38 [2018-11-28 11:34:22,585 INFO L73 IsDeterministic]: Start isDeterministic. Operand 82 states and 120 transitions. [2018-11-28 11:34:22,585 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-28 11:34:22,585 INFO L705 BuchiCegarLoop]: Abstraction has 82 states and 120 transitions. [2018-11-28 11:34:22,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states and 120 transitions. [2018-11-28 11:34:22,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 55. [2018-11-28 11:34:22,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-11-28 11:34:22,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 83 transitions. [2018-11-28 11:34:22,609 INFO L728 BuchiCegarLoop]: Abstraction has 55 states and 83 transitions. [2018-11-28 11:34:22,609 INFO L608 BuchiCegarLoop]: Abstraction has 55 states and 83 transitions. [2018-11-28 11:34:22,609 INFO L442 BuchiCegarLoop]: ======== Iteration 2============ [2018-11-28 11:34:22,609 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 55 states and 83 transitions. [2018-11-28 11:34:22,610 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2018-11-28 11:34:22,611 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-28 11:34:22,611 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-28 11:34:22,611 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 11:34:22,611 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2018-11-28 11:34:22,611 INFO L794 eck$LassoCheckResult]: Stem: 378#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 345#L25 call main_#t~ret6 := rec2(main_~x~0);< 344#rec2ENTRY ~j := #in~j; 347#L18 assume !(~j <= 0); 363#L20 call #t~ret3 := rec1(~j - 1);< 379#rec1ENTRY ~i := #in~i; 397#L12 assume !(~i <= 0); 351#L14 call #t~ret0 := rec1(~i - 2);< 350#rec1ENTRY [2018-11-28 11:34:22,611 INFO L796 eck$LassoCheckResult]: Loop: 350#rec1ENTRY ~i := #in~i; 358#L12 assume !(~i <= 0); 354#L14 call #t~ret0 := rec1(~i - 2);< 350#rec1ENTRY [2018-11-28 11:34:22,611 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:34:22,612 INFO L82 PathProgramCache]: Analyzing trace with hash 874549579, now seen corresponding path program 1 times [2018-11-28 11:34:22,612 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:34:22,612 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:34:22,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:34:22,612 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 11:34:22,612 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:34:22,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:34:22,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:34:22,618 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:34:22,619 INFO L82 PathProgramCache]: Analyzing trace with hash 29941, now seen corresponding path program 1 times [2018-11-28 11:34:22,619 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:34:22,619 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:34:22,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:34:22,620 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 11:34:22,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:34:22,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:34:22,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:34:22,624 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:34:22,624 INFO L82 PathProgramCache]: Analyzing trace with hash 434890603, now seen corresponding path program 2 times [2018-11-28 11:34:22,624 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:34:22,624 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:34:22,625 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:34:22,625 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 11:34:22,625 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:34:22,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:34:22,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:34:22,668 INFO L216 LassoAnalysis]: Preferences: [2018-11-28 11:34:22,668 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-28 11:34:22,668 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-28 11:34:22,669 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-28 11:34:22,669 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-28 11:34:22,669 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:34:22,669 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-28 11:34:22,669 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-28 11:34:22,669 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration2_Loop [2018-11-28 11:34:22,669 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-28 11:34:22,669 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-28 11:34:22,670 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:34:22,672 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:34:22,673 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:34:22,675 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:34:22,677 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:34:22,678 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:34:22,704 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-28 11:34:22,704 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e51f2ea7-ac65-4382-8229-579806de65b8/bin-2019/uautomizer/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:34:22,706 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:34:22,706 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:34:22,708 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:34:22,708 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_e51f2ea7-ac65-4382-8229-579806de65b8/bin-2019/uautomizer/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:34:22,723 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:34:22,723 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:34:22,725 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:34:22,725 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_e51f2ea7-ac65-4382-8229-579806de65b8/bin-2019/uautomizer/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:34:22,740 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:34:22,740 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:34:22,742 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:34:22,743 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_e51f2ea7-ac65-4382-8229-579806de65b8/bin-2019/uautomizer/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:34:22,757 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:34:22,757 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:34:22,759 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:34:22,759 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_e51f2ea7-ac65-4382-8229-579806de65b8/bin-2019/uautomizer/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:34:22,774 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:34:22,774 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:34:22,776 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:34:22,776 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_e51f2ea7-ac65-4382-8229-579806de65b8/bin-2019/uautomizer/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:34:22,791 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:34:22,792 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e51f2ea7-ac65-4382-8229-579806de65b8/bin-2019/uautomizer/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:34:22,808 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-28 11:34:22,808 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:34:22,824 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-28 11:34:22,825 INFO L216 LassoAnalysis]: Preferences: [2018-11-28 11:34:22,825 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-28 11:34:22,825 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-28 11:34:22,825 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-28 11:34:22,825 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-28 11:34:22,825 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:34:22,825 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-28 11:34:22,825 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-28 11:34:22,825 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration2_Loop [2018-11-28 11:34:22,825 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-28 11:34:22,826 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-28 11:34:22,826 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:34:22,828 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:34:22,829 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:34:22,830 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:34:22,832 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:34:22,836 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:34:22,853 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-28 11:34:22,853 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-28 11:34:22,853 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 11:34:22,853 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 11:34:22,854 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 11:34:22,854 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 11:34:22,854 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 11:34:22,854 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 11:34:22,854 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 11:34:22,854 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 11:34:22,856 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 11:34:22,856 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 11:34:22,856 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 11:34:22,857 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 11:34:22,857 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 11:34:22,857 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 11:34:22,857 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 11:34:22,857 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 11:34:22,857 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 11:34:22,858 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 11:34:22,859 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 11:34:22,859 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 11:34:22,859 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 11:34:22,859 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 11:34:22,860 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 11:34:22,860 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 11:34:22,860 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 11:34:22,860 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 11:34:22,861 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 11:34:22,861 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 11:34:22,862 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 11:34:22,862 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 11:34:22,862 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 11:34:22,862 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 11:34:22,862 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 11:34:22,863 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 11:34:22,863 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 11:34:22,864 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 11:34:22,864 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 11:34:22,864 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 11:34:22,865 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 11:34:22,865 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 11:34:22,865 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 11:34:22,865 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 11:34:22,865 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 11:34:22,866 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 11:34:22,869 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-28 11:34:22,871 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2018-11-28 11:34:22,871 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2018-11-28 11:34:22,871 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-28 11:34:22,871 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-28 11:34:22,872 INFO L518 LassoAnalysis]: Proved termination. [2018-11-28 11:34:22,872 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] [2018-11-28 11:34:22,872 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-28 11:34:22,888 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:34:22,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:34:22,900 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 11:34:22,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:34:22,907 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 11:34:22,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 11:34:22,920 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2018-11-28 11:34:22,920 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 55 states and 83 transitions. cyclomatic complexity: 32 Second operand 4 states. [2018-11-28 11:34:22,951 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 55 states and 83 transitions. cyclomatic complexity: 32. Second operand 4 states. Result 105 states and 149 transitions. Complement of second has 13 states. [2018-11-28 11:34:22,952 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2018-11-28 11:34:22,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2018-11-28 11:34:22,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 17 transitions. [2018-11-28 11:34:22,953 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 17 transitions. Stem has 8 letters. Loop has 3 letters. [2018-11-28 11:34:22,953 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 11:34:22,953 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 17 transitions. Stem has 11 letters. Loop has 3 letters. [2018-11-28 11:34:22,953 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 11:34:22,953 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 17 transitions. Stem has 8 letters. Loop has 6 letters. [2018-11-28 11:34:22,953 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 11:34:22,953 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 105 states and 149 transitions. [2018-11-28 11:34:22,955 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2018-11-28 11:34:22,957 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 105 states to 93 states and 137 transitions. [2018-11-28 11:34:22,957 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 37 [2018-11-28 11:34:22,957 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 39 [2018-11-28 11:34:22,957 INFO L73 IsDeterministic]: Start isDeterministic. Operand 93 states and 137 transitions. [2018-11-28 11:34:22,958 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-28 11:34:22,958 INFO L705 BuchiCegarLoop]: Abstraction has 93 states and 137 transitions. [2018-11-28 11:34:22,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states and 137 transitions. [2018-11-28 11:34:22,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 89. [2018-11-28 11:34:22,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2018-11-28 11:34:22,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 129 transitions. [2018-11-28 11:34:22,965 INFO L728 BuchiCegarLoop]: Abstraction has 89 states and 129 transitions. [2018-11-28 11:34:22,965 INFO L608 BuchiCegarLoop]: Abstraction has 89 states and 129 transitions. [2018-11-28 11:34:22,965 INFO L442 BuchiCegarLoop]: ======== Iteration 3============ [2018-11-28 11:34:22,965 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 89 states and 129 transitions. [2018-11-28 11:34:22,966 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2018-11-28 11:34:22,966 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-28 11:34:22,966 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-28 11:34:22,967 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 11:34:22,967 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2018-11-28 11:34:22,967 INFO L794 eck$LassoCheckResult]: Stem: 613#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 614#L25 call main_#t~ret6 := rec2(main_~x~0);< 620#rec2ENTRY ~j := #in~j; 633#L18 assume !(~j <= 0); 615#L20 call #t~ret3 := rec1(~j - 1);< 642#rec1ENTRY ~i := #in~i; 637#L12 assume !(~i <= 0); 577#L14 call #t~ret0 := rec1(~i - 2);< 576#rec1ENTRY ~i := #in~i; 579#L12 assume ~i <= 0;#res := 0; 583#rec1FINAL assume true; 584#rec1EXIT >#27#return; 593#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 595#rec1ENTRY [2018-11-28 11:34:22,967 INFO L796 eck$LassoCheckResult]: Loop: 595#rec1ENTRY ~i := #in~i; 632#L12 assume !(~i <= 0); 589#L14 call #t~ret0 := rec1(~i - 2);< 595#rec1ENTRY [2018-11-28 11:34:22,968 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:34:22,968 INFO L82 PathProgramCache]: Analyzing trace with hash 1317996508, now seen corresponding path program 1 times [2018-11-28 11:34:22,968 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:34:22,968 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:34:22,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:34:22,969 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 11:34:22,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:34:22,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:34:22,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:34:22,978 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:34:22,978 INFO L82 PathProgramCache]: Analyzing trace with hash 29941, now seen corresponding path program 2 times [2018-11-28 11:34:22,978 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:34:22,978 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:34:22,978 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:34:22,979 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 11:34:22,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:34:22,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:34:22,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:34:22,981 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:34:22,982 INFO L82 PathProgramCache]: Analyzing trace with hash -157050054, now seen corresponding path program 2 times [2018-11-28 11:34:22,982 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:34:22,982 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:34:22,982 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:34:22,982 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 11:34:22,982 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:34:22,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:34:23,017 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-28 11:34:23,018 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-28 11:34:23,018 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-28 11:34:23,040 INFO L216 LassoAnalysis]: Preferences: [2018-11-28 11:34:23,040 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-28 11:34:23,040 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-28 11:34:23,040 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-28 11:34:23,040 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-28 11:34:23,048 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:34:23,048 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-28 11:34:23,048 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-28 11:34:23,048 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration3_Loop [2018-11-28 11:34:23,048 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-28 11:34:23,049 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-28 11:34:23,050 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:34:23,053 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:34:23,057 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:34:23,058 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:34:23,059 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:34:23,064 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:34:23,079 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-28 11:34:23,079 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e51f2ea7-ac65-4382-8229-579806de65b8/bin-2019/uautomizer/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:34:23,081 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:34:23,081 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:34:23,083 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:34:23,084 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_e51f2ea7-ac65-4382-8229-579806de65b8/bin-2019/uautomizer/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:34:23,098 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:34:23,098 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e51f2ea7-ac65-4382-8229-579806de65b8/bin-2019/uautomizer/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:34:23,116 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-28 11:34:23,116 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:34:23,131 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-28 11:34:23,133 INFO L216 LassoAnalysis]: Preferences: [2018-11-28 11:34:23,133 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-28 11:34:23,133 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-28 11:34:23,133 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-28 11:34:23,133 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-28 11:34:23,133 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:34:23,134 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-28 11:34:23,134 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-28 11:34:23,134 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration3_Loop [2018-11-28 11:34:23,134 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-28 11:34:23,134 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-28 11:34:23,134 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:34:23,136 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:34:23,141 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:34:23,142 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:34:23,143 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:34:23,144 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:34:23,164 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-28 11:34:23,164 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-28 11:34:23,165 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 11:34:23,165 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 11:34:23,166 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 11:34:23,166 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 11:34:23,166 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 11:34:23,166 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 11:34:23,166 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 11:34:23,166 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 11:34:23,167 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 11:34:23,167 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 11:34:23,168 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 11:34:23,168 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 11:34:23,168 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 11:34:23,168 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 11:34:23,168 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 11:34:23,168 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 11:34:23,169 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 11:34:23,171 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-28 11:34:23,173 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2018-11-28 11:34:23,173 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2018-11-28 11:34:23,173 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-28 11:34:23,173 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-28 11:34:23,173 INFO L518 LassoAnalysis]: Proved termination. [2018-11-28 11:34:23,173 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] [2018-11-28 11:34:23,174 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-28 11:34:23,193 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:34:23,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:34:23,212 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 11:34:23,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:34:23,232 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 11:34:23,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 11:34:23,242 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2018-11-28 11:34:23,242 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 89 states and 129 transitions. cyclomatic complexity: 47 Second operand 5 states. [2018-11-28 11:34:23,290 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 89 states and 129 transitions. cyclomatic complexity: 47. Second operand 5 states. Result 134 states and 193 transitions. Complement of second has 14 states. [2018-11-28 11:34:23,291 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2018-11-28 11:34:23,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-11-28 11:34:23,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 19 transitions. [2018-11-28 11:34:23,291 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 19 transitions. Stem has 13 letters. Loop has 3 letters. [2018-11-28 11:34:23,292 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 11:34:23,292 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 19 transitions. Stem has 16 letters. Loop has 3 letters. [2018-11-28 11:34:23,292 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 11:34:23,292 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 19 transitions. Stem has 13 letters. Loop has 6 letters. [2018-11-28 11:34:23,292 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 11:34:23,292 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 134 states and 193 transitions. [2018-11-28 11:34:23,294 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2018-11-28 11:34:23,296 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 134 states to 122 states and 181 transitions. [2018-11-28 11:34:23,296 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 48 [2018-11-28 11:34:23,297 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 50 [2018-11-28 11:34:23,297 INFO L73 IsDeterministic]: Start isDeterministic. Operand 122 states and 181 transitions. [2018-11-28 11:34:23,297 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-28 11:34:23,297 INFO L705 BuchiCegarLoop]: Abstraction has 122 states and 181 transitions. [2018-11-28 11:34:23,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states and 181 transitions. [2018-11-28 11:34:23,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 113. [2018-11-28 11:34:23,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-11-28 11:34:23,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 165 transitions. [2018-11-28 11:34:23,304 INFO L728 BuchiCegarLoop]: Abstraction has 113 states and 165 transitions. [2018-11-28 11:34:23,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-28 11:34:23,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-11-28 11:34:23,307 INFO L87 Difference]: Start difference. First operand 113 states and 165 transitions. Second operand 6 states. [2018-11-28 11:34:23,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 11:34:23,336 INFO L93 Difference]: Finished difference Result 123 states and 175 transitions. [2018-11-28 11:34:23,336 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-28 11:34:23,337 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 123 states and 175 transitions. [2018-11-28 11:34:23,338 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 11 [2018-11-28 11:34:23,340 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 123 states to 121 states and 173 transitions. [2018-11-28 11:34:23,340 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 55 [2018-11-28 11:34:23,340 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 55 [2018-11-28 11:34:23,340 INFO L73 IsDeterministic]: Start isDeterministic. Operand 121 states and 173 transitions. [2018-11-28 11:34:23,341 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-28 11:34:23,341 INFO L705 BuchiCegarLoop]: Abstraction has 121 states and 173 transitions. [2018-11-28 11:34:23,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states and 173 transitions. [2018-11-28 11:34:23,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 101. [2018-11-28 11:34:23,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-11-28 11:34:23,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 143 transitions. [2018-11-28 11:34:23,348 INFO L728 BuchiCegarLoop]: Abstraction has 101 states and 143 transitions. [2018-11-28 11:34:23,348 INFO L608 BuchiCegarLoop]: Abstraction has 101 states and 143 transitions. [2018-11-28 11:34:23,348 INFO L442 BuchiCegarLoop]: ======== Iteration 4============ [2018-11-28 11:34:23,349 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 101 states and 143 transitions. [2018-11-28 11:34:23,349 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 10 [2018-11-28 11:34:23,349 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-28 11:34:23,349 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-28 11:34:23,350 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 11:34:23,350 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [3, 2, 2, 1, 1, 1, 1, 1, 1] [2018-11-28 11:34:23,350 INFO L794 eck$LassoCheckResult]: Stem: 1162#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 1163#L25 call main_#t~ret6 := rec2(main_~x~0);< 1170#rec2ENTRY ~j := #in~j; 1181#L18 assume !(~j <= 0); 1140#L20 call #t~ret3 := rec1(~j - 1);< 1180#rec1ENTRY ~i := #in~i; 1179#L12 assume !(~i <= 0); 1156#L14 call #t~ret0 := rec1(~i - 2);< 1176#rec1ENTRY ~i := #in~i; 1175#L12 assume !(~i <= 0); 1153#L14 call #t~ret0 := rec1(~i - 2);< 1174#rec1ENTRY ~i := #in~i; 1178#L12 assume ~i <= 0;#res := 0; 1220#rec1FINAL assume true; 1160#rec1EXIT >#27#return; 1129#L14-1 [2018-11-28 11:34:23,350 INFO L796 eck$LassoCheckResult]: Loop: 1129#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 1128#rec1ENTRY ~i := #in~i; 1131#L12 assume ~i <= 0;#res := 0; 1136#rec1FINAL assume true; 1137#rec1EXIT >#29#return; 1148#L14-2 call #t~ret2 := rec1(#t~ret1);< 1157#rec1ENTRY ~i := #in~i; 1200#L12 assume !(~i <= 0); 1149#L14 call #t~ret0 := rec1(~i - 2);< 1157#rec1ENTRY ~i := #in~i; 1200#L12 assume ~i <= 0;#res := 0; 1201#rec1FINAL assume true; 1209#rec1EXIT >#27#return; 1129#L14-1 [2018-11-28 11:34:23,350 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:34:23,350 INFO L82 PathProgramCache]: Analyzing trace with hash -377207200, now seen corresponding path program 1 times [2018-11-28 11:34:23,350 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:34:23,350 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:34:23,351 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:34:23,351 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 11:34:23,351 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:34:23,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:34:23,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:34:23,357 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:34:23,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1306212703, now seen corresponding path program 1 times [2018-11-28 11:34:23,357 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:34:23,357 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:34:23,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:34:23,357 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 11:34:23,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:34:23,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:34:23,396 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-11-28 11:34:23,396 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 11:34:23,396 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e51f2ea7-ac65-4382-8229-579806de65b8/bin-2019/uautomizer/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 11:34:23,403 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 11:34:23,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:34:23,409 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 11:34:23,412 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 11:34:23,427 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-11-28 11:34:23,427 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 6 [2018-11-28 11:34:23,427 INFO L811 eck$LassoCheckResult]: loop already infeasible [2018-11-28 11:34:23,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-28 11:34:23,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-11-28 11:34:23,428 INFO L87 Difference]: Start difference. First operand 101 states and 143 transitions. cyclomatic complexity: 49 Second operand 6 states. [2018-11-28 11:34:23,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 11:34:23,460 INFO L93 Difference]: Finished difference Result 117 states and 161 transitions. [2018-11-28 11:34:23,460 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-28 11:34:23,460 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 117 states and 161 transitions. [2018-11-28 11:34:23,462 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2018-11-28 11:34:23,464 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 117 states to 117 states and 161 transitions. [2018-11-28 11:34:23,464 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 53 [2018-11-28 11:34:23,464 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 53 [2018-11-28 11:34:23,464 INFO L73 IsDeterministic]: Start isDeterministic. Operand 117 states and 161 transitions. [2018-11-28 11:34:23,464 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-28 11:34:23,464 INFO L705 BuchiCegarLoop]: Abstraction has 117 states and 161 transitions. [2018-11-28 11:34:23,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states and 161 transitions. [2018-11-28 11:34:23,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 113. [2018-11-28 11:34:23,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2018-11-28 11:34:23,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 157 transitions. [2018-11-28 11:34:23,471 INFO L728 BuchiCegarLoop]: Abstraction has 113 states and 157 transitions. [2018-11-28 11:34:23,471 INFO L608 BuchiCegarLoop]: Abstraction has 113 states and 157 transitions. [2018-11-28 11:34:23,471 INFO L442 BuchiCegarLoop]: ======== Iteration 5============ [2018-11-28 11:34:23,471 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 113 states and 157 transitions. [2018-11-28 11:34:23,472 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 9 [2018-11-28 11:34:23,472 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-28 11:34:23,472 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-28 11:34:23,473 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 11:34:23,474 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 11:34:23,474 INFO L794 eck$LassoCheckResult]: Stem: 1425#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; 1426#L25 call main_#t~ret6 := rec2(main_~x~0);< 1442#rec2ENTRY ~j := #in~j; 1453#L18 assume !(~j <= 0); 1411#L20 call #t~ret3 := rec1(~j - 1);< 1452#rec1ENTRY ~i := #in~i; 1451#L12 assume !(~i <= 0); 1406#L14 call #t~ret0 := rec1(~i - 2);< 1450#rec1ENTRY ~i := #in~i; 1419#L12 assume ~i <= 0;#res := 0; 1405#rec1FINAL assume true; 1407#rec1EXIT >#27#return; 1399#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 1397#rec1ENTRY ~i := #in~i; 1400#L12 assume ~i <= 0;#res := 0; 1493#rec1FINAL assume true; 1488#rec1EXIT >#29#return; 1421#L14-2 call #t~ret2 := rec1(#t~ret1);< 1422#rec1ENTRY ~i := #in~i; 1486#L12 assume ~i <= 0;#res := 0; 1485#rec1FINAL assume true; 1482#rec1EXIT >#31#return; 1415#L14-3 #res := 1 + #t~ret2;havoc #t~ret0;havoc #t~ret1;havoc #t~ret2; 1416#rec1FINAL assume true; 1446#rec1EXIT >#33#return; 1392#L20-1 [2018-11-28 11:34:23,474 INFO L796 eck$LassoCheckResult]: Loop: 1392#L20-1 call #t~ret4 := rec2(#t~ret3);< 1391#rec2ENTRY ~j := #in~j; 1393#L18 assume !(~j <= 0); 1429#L20 call #t~ret3 := rec1(~j - 1);< 1434#rec1ENTRY ~i := #in~i; 1492#L12 assume !(~i <= 0); 1427#L14 call #t~ret0 := rec1(~i - 2);< 1434#rec1ENTRY ~i := #in~i; 1492#L12 assume ~i <= 0;#res := 0; 1487#rec1FINAL assume true; 1484#rec1EXIT >#27#return; 1398#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 1397#rec1ENTRY ~i := #in~i; 1400#L12 assume ~i <= 0;#res := 0; 1493#rec1FINAL assume true; 1488#rec1EXIT >#29#return; 1483#L14-2 call #t~ret2 := rec1(#t~ret1);< 1422#rec1ENTRY ~i := #in~i; 1486#L12 assume ~i <= 0;#res := 0; 1485#rec1FINAL assume true; 1482#rec1EXIT >#31#return; 1445#L14-3 #res := 1 + #t~ret2;havoc #t~ret0;havoc #t~ret1;havoc #t~ret2; 1457#rec1FINAL assume true; 1443#rec1EXIT >#33#return; 1392#L20-1 [2018-11-28 11:34:23,474 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:34:23,474 INFO L82 PathProgramCache]: Analyzing trace with hash -790062692, now seen corresponding path program 1 times [2018-11-28 11:34:23,474 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:34:23,474 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:34:23,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:34:23,475 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 11:34:23,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:34:23,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:34:23,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:34:23,487 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:34:23,487 INFO L82 PathProgramCache]: Analyzing trace with hash 125202860, now seen corresponding path program 1 times [2018-11-28 11:34:23,487 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:34:23,487 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:34:23,487 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:34:23,488 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 11:34:23,488 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:34:23,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:34:23,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:34:23,498 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:34:23,498 INFO L82 PathProgramCache]: Analyzing trace with hash -2019382713, now seen corresponding path program 1 times [2018-11-28 11:34:23,498 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:34:23,498 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:34:23,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:34:23,499 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 11:34:23,499 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:34:23,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:34:23,586 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 28 proven. 22 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2018-11-28 11:34:23,586 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 11:34:23,586 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e51f2ea7-ac65-4382-8229-579806de65b8/bin-2019/uautomizer/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 11:34:23,599 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 11:34:23,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:34:23,616 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 11:34:23,624 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 28 proven. 22 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2018-11-28 11:34:23,648 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 11:34:23,649 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-11-28 11:34:23,788 INFO L216 LassoAnalysis]: Preferences: [2018-11-28 11:34:23,788 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-28 11:34:23,788 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-28 11:34:23,788 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-28 11:34:23,788 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-28 11:34:23,788 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:34:23,788 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-28 11:34:23,788 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-28 11:34:23,789 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration5_Loop [2018-11-28 11:34:23,789 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-28 11:34:23,789 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-28 11:34:23,789 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:34:23,796 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:34:23,798 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:34:23,816 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-28 11:34:23,816 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e51f2ea7-ac65-4382-8229-579806de65b8/bin-2019/uautomizer/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:34:23,818 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:34:23,818 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e51f2ea7-ac65-4382-8229-579806de65b8/bin-2019/uautomizer/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:34:23,836 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-28 11:34:23,836 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:34:26,282 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-28 11:34:26,284 INFO L216 LassoAnalysis]: Preferences: [2018-11-28 11:34:26,284 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-28 11:34:26,284 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-28 11:34:26,285 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-28 11:34:26,285 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-28 11:34:26,285 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:34:26,285 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-28 11:34:26,285 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-28 11:34:26,285 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration5_Loop [2018-11-28 11:34:26,285 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-28 11:34:26,285 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-28 11:34:26,286 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:34:26,288 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:34:26,289 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:34:26,313 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-28 11:34:26,313 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-28 11:34:26,314 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 11:34:26,314 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 11:34:26,314 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 11:34:26,314 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 11:34:26,314 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 11:34:26,314 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 11:34:26,315 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 11:34:26,315 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 11:34:26,315 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 11:34:26,315 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 11:34:26,316 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 11:34:26,316 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 11:34:26,316 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 11:34:26,316 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 11:34:26,316 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 11:34:26,316 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 11:34:26,316 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 11:34:26,316 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 11:34:26,317 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 11:34:26,317 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 11:34:26,317 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 11:34:26,317 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 11:34:26,317 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 11:34:26,317 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 11:34:26,317 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 11:34:26,317 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 11:34:26,320 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-28 11:34:26,322 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-11-28 11:34:26,322 INFO L444 ModelExtractionUtils]: 2 out of 5 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-11-28 11:34:26,322 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-28 11:34:26,322 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-28 11:34:26,322 INFO L518 LassoAnalysis]: Proved termination. [2018-11-28 11:34:26,322 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec2_#t~ret3) = 1*rec2_#t~ret3 Supporting invariants [] [2018-11-28 11:34:26,322 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-28 11:34:26,338 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:34:26,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:34:26,357 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 11:34:26,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:34:26,395 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 11:34:26,472 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-11-28 11:34:26,473 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 9 loop predicates [2018-11-28 11:34:26,473 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 113 states and 157 transitions. cyclomatic complexity: 51 Second operand 11 states. [2018-11-28 11:34:26,743 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 113 states and 157 transitions. cyclomatic complexity: 51. Second operand 11 states. Result 584 states and 903 transitions. Complement of second has 45 states. [2018-11-28 11:34:26,743 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 11 states 2 stem states 8 non-accepting loop states 1 accepting loop states [2018-11-28 11:34:26,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-11-28 11:34:26,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 52 transitions. [2018-11-28 11:34:26,744 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 52 transitions. Stem has 25 letters. Loop has 24 letters. [2018-11-28 11:34:26,744 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 11:34:26,744 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 52 transitions. Stem has 49 letters. Loop has 24 letters. [2018-11-28 11:34:26,745 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 11:34:26,745 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 52 transitions. Stem has 25 letters. Loop has 48 letters. [2018-11-28 11:34:26,746 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 11:34:26,746 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 584 states and 903 transitions. [2018-11-28 11:34:26,751 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 14 [2018-11-28 11:34:26,757 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 584 states to 432 states and 649 transitions. [2018-11-28 11:34:26,757 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 140 [2018-11-28 11:34:26,758 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 141 [2018-11-28 11:34:26,758 INFO L73 IsDeterministic]: Start isDeterministic. Operand 432 states and 649 transitions. [2018-11-28 11:34:26,758 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-28 11:34:26,758 INFO L705 BuchiCegarLoop]: Abstraction has 432 states and 649 transitions. [2018-11-28 11:34:26,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states and 649 transitions. [2018-11-28 11:34:26,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 383. [2018-11-28 11:34:26,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 383 states. [2018-11-28 11:34:26,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 534 transitions. [2018-11-28 11:34:26,780 INFO L728 BuchiCegarLoop]: Abstraction has 383 states and 534 transitions. [2018-11-28 11:34:26,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-28 11:34:26,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2018-11-28 11:34:26,781 INFO L87 Difference]: Start difference. First operand 383 states and 534 transitions. Second operand 10 states. [2018-11-28 11:34:26,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 11:34:26,907 INFO L93 Difference]: Finished difference Result 442 states and 645 transitions. [2018-11-28 11:34:26,907 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-11-28 11:34:26,907 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 442 states and 645 transitions. [2018-11-28 11:34:26,912 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 14 [2018-11-28 11:34:26,917 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 442 states to 349 states and 495 transitions. [2018-11-28 11:34:26,917 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 131 [2018-11-28 11:34:26,917 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 135 [2018-11-28 11:34:26,918 INFO L73 IsDeterministic]: Start isDeterministic. Operand 349 states and 495 transitions. [2018-11-28 11:34:26,918 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-28 11:34:26,918 INFO L705 BuchiCegarLoop]: Abstraction has 349 states and 495 transitions. [2018-11-28 11:34:26,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states and 495 transitions. [2018-11-28 11:34:26,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 314. [2018-11-28 11:34:26,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 314 states. [2018-11-28 11:34:26,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 415 transitions. [2018-11-28 11:34:26,930 INFO L728 BuchiCegarLoop]: Abstraction has 314 states and 415 transitions. [2018-11-28 11:34:26,930 INFO L608 BuchiCegarLoop]: Abstraction has 314 states and 415 transitions. [2018-11-28 11:34:26,931 INFO L442 BuchiCegarLoop]: ======== Iteration 6============ [2018-11-28 11:34:26,931 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 314 states and 415 transitions. [2018-11-28 11:34:26,932 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 14 [2018-11-28 11:34:26,933 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-28 11:34:26,933 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-28 11:34:26,933 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [5, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 11:34:26,933 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2018-11-28 11:34:26,934 INFO L794 eck$LassoCheckResult]: Stem: 3360#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; 3361#L25 call main_#t~ret6 := rec2(main_~x~0);< 3377#rec2ENTRY ~j := #in~j; 3400#L18 assume !(~j <= 0); 3339#L20 call #t~ret3 := rec1(~j - 1);< 3398#rec1ENTRY ~i := #in~i; 3413#L12 assume !(~i <= 0); 3409#L14 call #t~ret0 := rec1(~i - 2);< 3412#rec1ENTRY ~i := #in~i; 3417#L12 assume ~i <= 0;#res := 0; 3517#rec1FINAL assume true; 3514#rec1EXIT >#27#return; 3338#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 3340#rec1ENTRY ~i := #in~i; 3516#L12 assume ~i <= 0;#res := 0; 3515#rec1FINAL assume true; 3511#rec1EXIT >#29#return; 3317#L14-2 call #t~ret2 := rec1(#t~ret1);< 3316#rec1ENTRY ~i := #in~i; 3319#L12 assume ~i <= 0;#res := 0; 3510#rec1FINAL assume true; 3509#rec1EXIT >#31#return; 3349#L14-3 #res := 1 + #t~ret2;havoc #t~ret0;havoc #t~ret1;havoc #t~ret2; 3350#rec1FINAL assume true; 3378#rec1EXIT >#33#return; 3379#L20-1 call #t~ret4 := rec2(#t~ret3);< 3498#rec2ENTRY ~j := #in~j; 3496#L18 assume !(~j <= 0); 3363#L20 call #t~ret3 := rec1(~j - 1);< 3493#rec1ENTRY ~i := #in~i; 3492#L12 assume !(~i <= 0); 3362#L14 call #t~ret0 := rec1(~i - 2);< 3365#rec1ENTRY [2018-11-28 11:34:26,934 INFO L796 eck$LassoCheckResult]: Loop: 3365#rec1ENTRY ~i := #in~i; 3466#L12 assume !(~i <= 0); 3447#L14 call #t~ret0 := rec1(~i - 2);< 3365#rec1ENTRY [2018-11-28 11:34:26,934 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:34:26,934 INFO L82 PathProgramCache]: Analyzing trace with hash -744961728, now seen corresponding path program 2 times [2018-11-28 11:34:26,934 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:34:26,934 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:34:26,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:34:26,935 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 11:34:26,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:34:26,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:34:26,976 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-11-28 11:34:26,976 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 11:34:26,976 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e51f2ea7-ac65-4382-8229-579806de65b8/bin-2019/uautomizer/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 11:34:26,995 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 11:34:27,001 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 11:34:27,002 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 11:34:27,003 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 11:34:27,008 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-11-28 11:34:27,024 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 11:34:27,025 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2018-11-28 11:34:27,025 INFO L799 eck$LassoCheckResult]: stem already infeasible [2018-11-28 11:34:27,025 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:34:27,025 INFO L82 PathProgramCache]: Analyzing trace with hash 29941, now seen corresponding path program 3 times [2018-11-28 11:34:27,025 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:34:27,025 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:34:27,026 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:34:27,026 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 11:34:27,026 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:34:27,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:34:27,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:34:27,039 INFO L216 LassoAnalysis]: Preferences: [2018-11-28 11:34:27,039 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-28 11:34:27,040 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-28 11:34:27,040 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-28 11:34:27,040 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-28 11:34:27,040 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:34:27,040 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-28 11:34:27,040 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-28 11:34:27,040 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration6_Loop [2018-11-28 11:34:27,040 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-28 11:34:27,040 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-28 11:34:27,041 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:34:27,043 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:34:27,046 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:34:27,048 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:34:27,049 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:34:27,052 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:34:27,065 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-28 11:34:27,065 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e51f2ea7-ac65-4382-8229-579806de65b8/bin-2019/uautomizer/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:34:27,069 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:34:27,069 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:34:27,071 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:34:27,071 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_e51f2ea7-ac65-4382-8229-579806de65b8/bin-2019/uautomizer/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:34:27,086 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:34:27,086 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e51f2ea7-ac65-4382-8229-579806de65b8/bin-2019/uautomizer/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:34:27,103 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-28 11:34:27,103 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:34:27,118 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-28 11:34:27,120 INFO L216 LassoAnalysis]: Preferences: [2018-11-28 11:34:27,120 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-28 11:34:27,120 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-28 11:34:27,120 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-28 11:34:27,120 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-28 11:34:27,120 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:34:27,120 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-28 11:34:27,120 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-28 11:34:27,120 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration6_Loop [2018-11-28 11:34:27,120 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-28 11:34:27,120 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-28 11:34:27,121 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:34:27,122 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:34:27,126 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:34:27,128 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:34:27,132 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:34:27,136 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:34:27,152 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-28 11:34:27,152 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-28 11:34:27,152 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 11:34:27,153 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 11:34:27,153 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 11:34:27,153 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 11:34:27,153 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 11:34:27,153 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 11:34:27,153 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 11:34:27,154 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 11:34:27,154 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 11:34:27,154 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 11:34:27,155 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 11:34:27,155 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 11:34:27,155 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 11:34:27,155 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 11:34:27,155 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 11:34:27,155 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 11:34:27,156 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 11:34:27,157 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-28 11:34:27,158 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2018-11-28 11:34:27,158 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2018-11-28 11:34:27,159 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-28 11:34:27,159 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-28 11:34:27,159 INFO L518 LassoAnalysis]: Proved termination. [2018-11-28 11:34:27,159 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] [2018-11-28 11:34:27,159 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-28 11:34:27,192 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:34:27,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:34:27,227 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 11:34:27,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:34:27,294 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 11:34:27,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 11:34:27,327 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2018-11-28 11:34:27,328 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 314 states and 415 transitions. cyclomatic complexity: 114 Second operand 5 states. [2018-11-28 11:34:27,398 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 314 states and 415 transitions. cyclomatic complexity: 114. Second operand 5 states. Result 348 states and 455 transitions. Complement of second has 14 states. [2018-11-28 11:34:27,400 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2018-11-28 11:34:27,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-11-28 11:34:27,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 17 transitions. [2018-11-28 11:34:27,401 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 17 transitions. Stem has 32 letters. Loop has 3 letters. [2018-11-28 11:34:27,401 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 11:34:27,401 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-28 11:34:27,417 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:34:27,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:34:27,447 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 11:34:27,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:34:27,467 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 11:34:27,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 11:34:27,485 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 3 loop predicates [2018-11-28 11:34:27,485 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 314 states and 415 transitions. cyclomatic complexity: 114 Second operand 5 states. [2018-11-28 11:34:27,531 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 314 states and 415 transitions. cyclomatic complexity: 114. Second operand 5 states. Result 348 states and 455 transitions. Complement of second has 14 states. [2018-11-28 11:34:27,532 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2018-11-28 11:34:27,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-11-28 11:34:27,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 17 transitions. [2018-11-28 11:34:27,532 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 17 transitions. Stem has 32 letters. Loop has 3 letters. [2018-11-28 11:34:27,532 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 11:34:27,532 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-28 11:34:27,539 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:34:27,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:34:27,564 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 11:34:27,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:34:27,588 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 11:34:27,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 11:34:27,598 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2018-11-28 11:34:27,598 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 314 states and 415 transitions. cyclomatic complexity: 114 Second operand 5 states. [2018-11-28 11:34:27,656 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 314 states and 415 transitions. cyclomatic complexity: 114. Second operand 5 states. Result 485 states and 616 transitions. Complement of second has 16 states. [2018-11-28 11:34:27,657 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2018-11-28 11:34:27,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2018-11-28 11:34:27,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 24 transitions. [2018-11-28 11:34:27,658 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 24 transitions. Stem has 32 letters. Loop has 3 letters. [2018-11-28 11:34:27,658 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 11:34:27,658 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 24 transitions. Stem has 35 letters. Loop has 3 letters. [2018-11-28 11:34:27,659 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 11:34:27,659 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 24 transitions. Stem has 32 letters. Loop has 6 letters. [2018-11-28 11:34:27,659 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 11:34:27,659 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 485 states and 616 transitions. [2018-11-28 11:34:27,662 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 26 [2018-11-28 11:34:27,666 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 485 states to 395 states and 526 transitions. [2018-11-28 11:34:27,666 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 129 [2018-11-28 11:34:27,666 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 136 [2018-11-28 11:34:27,667 INFO L73 IsDeterministic]: Start isDeterministic. Operand 395 states and 526 transitions. [2018-11-28 11:34:27,667 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-28 11:34:27,667 INFO L705 BuchiCegarLoop]: Abstraction has 395 states and 526 transitions. [2018-11-28 11:34:27,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states and 526 transitions. [2018-11-28 11:34:27,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 351. [2018-11-28 11:34:27,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 351 states. [2018-11-28 11:34:27,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 456 transitions. [2018-11-28 11:34:27,676 INFO L728 BuchiCegarLoop]: Abstraction has 351 states and 456 transitions. [2018-11-28 11:34:27,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-11-28 11:34:27,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2018-11-28 11:34:27,677 INFO L87 Difference]: Start difference. First operand 351 states and 456 transitions. Second operand 10 states. [2018-11-28 11:34:27,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 11:34:27,735 INFO L93 Difference]: Finished difference Result 378 states and 513 transitions. [2018-11-28 11:34:27,740 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-11-28 11:34:27,740 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 378 states and 513 transitions. [2018-11-28 11:34:27,742 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 22 [2018-11-28 11:34:27,743 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 378 states to 104 states and 142 transitions. [2018-11-28 11:34:27,743 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 98 [2018-11-28 11:34:27,743 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 98 [2018-11-28 11:34:27,744 INFO L73 IsDeterministic]: Start isDeterministic. Operand 104 states and 142 transitions. [2018-11-28 11:34:27,744 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-28 11:34:27,744 INFO L705 BuchiCegarLoop]: Abstraction has 104 states and 142 transitions. [2018-11-28 11:34:27,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states and 142 transitions. [2018-11-28 11:34:27,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 86. [2018-11-28 11:34:27,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2018-11-28 11:34:27,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 106 transitions. [2018-11-28 11:34:27,747 INFO L728 BuchiCegarLoop]: Abstraction has 86 states and 106 transitions. [2018-11-28 11:34:27,747 INFO L608 BuchiCegarLoop]: Abstraction has 86 states and 106 transitions. [2018-11-28 11:34:27,747 INFO L442 BuchiCegarLoop]: ======== Iteration 7============ [2018-11-28 11:34:27,747 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 86 states and 106 transitions. [2018-11-28 11:34:27,748 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 22 [2018-11-28 11:34:27,748 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-28 11:34:27,748 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-28 11:34:27,748 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1] [2018-11-28 11:34:27,749 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2018-11-28 11:34:27,749 INFO L794 eck$LassoCheckResult]: Stem: 6075#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 6076#L25 call main_#t~ret6 := rec2(main_~x~0);< 6080#rec2ENTRY ~j := #in~j; 6108#L18 assume !(~j <= 0); 6105#L20 call #t~ret3 := rec1(~j - 1);< 6107#rec1ENTRY ~i := #in~i; 6106#L12 assume !(~i <= 0); 6060#L14 call #t~ret0 := rec1(~i - 2);< 6082#rec1ENTRY ~i := #in~i; 6070#L12 assume !(~i <= 0); 6063#L14 [2018-11-28 11:34:27,749 INFO L796 eck$LassoCheckResult]: Loop: 6063#L14 call #t~ret0 := rec1(~i - 2);< 6113#rec1ENTRY ~i := #in~i; 6070#L12 assume !(~i <= 0); 6063#L14 [2018-11-28 11:34:27,749 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:34:27,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1371444593, now seen corresponding path program 3 times [2018-11-28 11:34:27,749 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:34:27,749 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:34:27,750 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:34:27,750 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 11:34:27,750 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:34:27,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:34:27,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:34:27,756 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:34:27,756 INFO L82 PathProgramCache]: Analyzing trace with hash 54781, now seen corresponding path program 4 times [2018-11-28 11:34:27,756 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:34:27,756 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:34:27,757 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:34:27,757 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 11:34:27,757 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:34:27,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:34:27,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:34:27,761 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:34:27,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1318041775, now seen corresponding path program 4 times [2018-11-28 11:34:27,761 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:34:27,761 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:34:27,762 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:34:27,762 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 11:34:27,762 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:34:27,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:34:27,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:34:27,796 INFO L216 LassoAnalysis]: Preferences: [2018-11-28 11:34:27,796 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-28 11:34:27,796 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-28 11:34:27,796 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-28 11:34:27,796 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-28 11:34:27,796 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:34:27,796 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-28 11:34:27,796 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-28 11:34:27,796 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration7_Loop [2018-11-28 11:34:27,796 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-28 11:34:27,796 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-28 11:34:27,797 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:34:27,800 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:34:27,801 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:34:27,802 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:34:27,803 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:34:27,816 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-28 11:34:27,817 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e51f2ea7-ac65-4382-8229-579806de65b8/bin-2019/uautomizer/z3 Starting monitored process 26 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 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:34:27,819 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:34:27,819 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e51f2ea7-ac65-4382-8229-579806de65b8/bin-2019/uautomizer/z3 Starting monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:34:27,837 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-28 11:34:27,837 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:34:30,587 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-28 11:34:30,589 INFO L216 LassoAnalysis]: Preferences: [2018-11-28 11:34:30,589 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-28 11:34:30,589 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-28 11:34:30,589 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-28 11:34:30,589 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-28 11:34:30,589 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:34:30,589 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-28 11:34:30,589 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-28 11:34:30,589 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration7_Loop [2018-11-28 11:34:30,589 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-28 11:34:30,589 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-28 11:34:30,590 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:34:30,595 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:34:30,596 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:34:30,597 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:34:30,598 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:34:30,615 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-28 11:34:30,615 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-28 11:34:30,615 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 11:34:30,615 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 11:34:30,615 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 11:34:30,616 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 11:34:30,616 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 11:34:30,616 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 11:34:30,616 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 11:34:30,616 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 11:34:30,617 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-28 11:34:30,619 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-11-28 11:34:30,619 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-11-28 11:34:30,620 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-28 11:34:30,620 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-28 11:34:30,620 INFO L518 LassoAnalysis]: Proved termination. [2018-11-28 11:34:30,620 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_~i) = 1*rec1_~i Supporting invariants [] [2018-11-28 11:34:30,620 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-28 11:34:30,643 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:34:30,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:34:30,654 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 11:34:30,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:34:30,661 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 11:34:30,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-28 11:34:30,693 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2018-11-28 11:34:30,694 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 86 states and 106 transitions. cyclomatic complexity: 23 Second operand 4 states. [2018-11-28 11:34:30,715 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 86 states and 106 transitions. cyclomatic complexity: 23. Second operand 4 states. Result 100 states and 124 transitions. Complement of second has 11 states. [2018-11-28 11:34:30,716 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 1 stem states 3 non-accepting loop states 1 accepting loop states [2018-11-28 11:34:30,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2018-11-28 11:34:30,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 13 transitions. [2018-11-28 11:34:30,716 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 13 transitions. Stem has 10 letters. Loop has 3 letters. [2018-11-28 11:34:30,717 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 11:34:30,717 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 13 transitions. Stem has 13 letters. Loop has 3 letters. [2018-11-28 11:34:30,717 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 11:34:30,717 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 13 transitions. Stem has 10 letters. Loop has 6 letters. [2018-11-28 11:34:30,717 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 11:34:30,717 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 100 states and 124 transitions. [2018-11-28 11:34:30,718 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 22 [2018-11-28 11:34:30,719 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 100 states to 94 states and 117 transitions. [2018-11-28 11:34:30,720 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 83 [2018-11-28 11:34:30,720 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 84 [2018-11-28 11:34:30,720 INFO L73 IsDeterministic]: Start isDeterministic. Operand 94 states and 117 transitions. [2018-11-28 11:34:30,720 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-28 11:34:30,720 INFO L705 BuchiCegarLoop]: Abstraction has 94 states and 117 transitions. [2018-11-28 11:34:30,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states and 117 transitions. [2018-11-28 11:34:30,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 92. [2018-11-28 11:34:30,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2018-11-28 11:34:30,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 114 transitions. [2018-11-28 11:34:30,724 INFO L728 BuchiCegarLoop]: Abstraction has 92 states and 114 transitions. [2018-11-28 11:34:30,726 INFO L608 BuchiCegarLoop]: Abstraction has 92 states and 114 transitions. [2018-11-28 11:34:30,726 INFO L442 BuchiCegarLoop]: ======== Iteration 8============ [2018-11-28 11:34:30,726 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 92 states and 114 transitions. [2018-11-28 11:34:30,727 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 22 [2018-11-28 11:34:30,727 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2018-11-28 11:34:30,727 INFO L119 BuchiIsEmpty]: Starting construction of run [2018-11-28 11:34:30,728 INFO L866 BuchiCegarLoop]: Counterexample stem histogram [5, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-28 11:34:30,728 INFO L867 BuchiCegarLoop]: Counterexample loop histogram [5, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2018-11-28 11:34:30,729 INFO L794 eck$LassoCheckResult]: Stem: 6332#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 6333#L25 call main_#t~ret6 := rec2(main_~x~0);< 6339#rec2ENTRY ~j := #in~j; 6338#L18 assume !(~j <= 0); 6334#L20 call #t~ret3 := rec1(~j - 1);< 6362#rec1ENTRY ~i := #in~i; 6363#L12 assume !(~i <= 0); 6318#L14 call #t~ret0 := rec1(~i - 2);< 6335#rec1ENTRY ~i := #in~i; 6366#L12 assume !(~i <= 0); 6301#L14 call #t~ret0 := rec1(~i - 2);< 6300#rec1ENTRY ~i := #in~i; 6302#L12 assume ~i <= 0;#res := 0; 6307#rec1FINAL assume true; 6308#rec1EXIT >#27#return; 6331#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 6379#rec1ENTRY ~i := #in~i; 6381#L12 assume ~i <= 0;#res := 0; 6380#rec1FINAL assume true; 6378#rec1EXIT >#29#return; 6346#L14-2 call #t~ret2 := rec1(#t~ret1);< 6347#rec1ENTRY ~i := #in~i; 6361#L12 assume ~i <= 0;#res := 0; 6358#rec1FINAL assume true; 6351#rec1EXIT >#31#return; 6317#L14-3 #res := 1 + #t~ret2;havoc #t~ret0;havoc #t~ret1;havoc #t~ret2; 6325#rec1FINAL assume true; 6350#rec1EXIT >#27#return; 6320#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 6349#rec1ENTRY [2018-11-28 11:34:30,729 INFO L796 eck$LassoCheckResult]: Loop: 6349#rec1ENTRY ~i := #in~i; 6354#L12 assume !(~i <= 0); 6324#L14 call #t~ret0 := rec1(~i - 2);< 6353#rec1ENTRY ~i := #in~i; 6374#L12 assume !(~i <= 0); 6319#L14 call #t~ret0 := rec1(~i - 2);< 6336#rec1ENTRY ~i := #in~i; 6326#L12 assume ~i <= 0;#res := 0; 6327#rec1FINAL assume true; 6364#rec1EXIT >#27#return; 6331#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 6379#rec1ENTRY ~i := #in~i; 6381#L12 assume ~i <= 0;#res := 0; 6380#rec1FINAL assume true; 6378#rec1EXIT >#29#return; 6346#L14-2 call #t~ret2 := rec1(#t~ret1);< 6347#rec1ENTRY ~i := #in~i; 6361#L12 assume ~i <= 0;#res := 0; 6358#rec1FINAL assume true; 6351#rec1EXIT >#31#return; 6317#L14-3 #res := 1 + #t~ret2;havoc #t~ret0;havoc #t~ret1;havoc #t~ret2; 6325#rec1FINAL assume true; 6350#rec1EXIT >#27#return; 6321#L14-1 call #t~ret1 := rec1(#t~ret0 - 1);< 6349#rec1ENTRY [2018-11-28 11:34:30,730 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:34:30,730 INFO L82 PathProgramCache]: Analyzing trace with hash 1733863270, now seen corresponding path program 1 times [2018-11-28 11:34:30,730 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:34:30,730 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:34:30,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:34:30,730 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-28 11:34:30,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:34:30,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:34:30,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:34:30,742 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:34:30,742 INFO L82 PathProgramCache]: Analyzing trace with hash -165506564, now seen corresponding path program 1 times [2018-11-28 11:34:30,742 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:34:30,743 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:34:30,743 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:34:30,743 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 11:34:30,743 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:34:30,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:34:30,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-11-28 11:34:30,754 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:34:30,755 INFO L82 PathProgramCache]: Analyzing trace with hash 2126813793, now seen corresponding path program 2 times [2018-11-28 11:34:30,755 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-11-28 11:34:30,755 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-11-28 11:34:30,755 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:34:30,755 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-28 11:34:30,756 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-28 11:34:30,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:34:30,790 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 24 proven. 29 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2018-11-28 11:34:30,790 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-28 11:34:30,790 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e51f2ea7-ac65-4382-8229-579806de65b8/bin-2019/uautomizer/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-28 11:34:30,796 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-28 11:34:30,804 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-28 11:34:30,805 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-28 11:34:30,806 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 11:34:30,810 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 109 proven. 2 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2018-11-28 11:34:30,825 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-11-28 11:34:30,825 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2018-11-28 11:34:30,980 INFO L216 LassoAnalysis]: Preferences: [2018-11-28 11:34:30,980 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-28 11:34:30,981 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-28 11:34:30,981 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-28 11:34:30,981 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2018-11-28 11:34:30,981 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:34:30,981 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-28 11:34:30,981 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-28 11:34:30,981 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration8_Loop [2018-11-28 11:34:30,981 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-28 11:34:30,981 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-28 11:34:30,982 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:34:30,985 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:34:30,988 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:34:30,989 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:34:30,993 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:34:30,994 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:34:31,020 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-28 11:34:31,020 INFO L412 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e51f2ea7-ac65-4382-8229-579806de65b8/bin-2019/uautomizer/z3 Starting monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:34:31,033 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:34:31,033 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:34:31,035 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:34:31,035 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_e51f2ea7-ac65-4382-8229-579806de65b8/bin-2019/uautomizer/z3 Starting monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:34:31,053 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:34:31,053 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:34:31,056 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:34:31,056 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_e51f2ea7-ac65-4382-8229-579806de65b8/bin-2019/uautomizer/z3 Starting monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:34:31,080 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:34:31,080 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:34:31,082 INFO L445 LassoAnalysis]: Proved nontermination for one component. [2018-11-28 11:34:31,082 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_e51f2ea7-ac65-4382-8229-579806de65b8/bin-2019/uautomizer/z3 Starting monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:34:31,107 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2018-11-28 11:34:31,108 INFO L163 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_e51f2ea7-ac65-4382-8229-579806de65b8/bin-2019/uautomizer/z3 Starting monitored process 33 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 33 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:34:31,125 INFO L151 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2018-11-28 11:34:31,125 INFO L163 nArgumentSynthesizer]: Using integer mode. [2018-11-28 11:34:31,129 INFO L452 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2018-11-28 11:34:31,144 INFO L216 LassoAnalysis]: Preferences: [2018-11-28 11:34:31,144 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2018-11-28 11:34:31,144 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2018-11-28 11:34:31,144 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2018-11-28 11:34:31,144 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2018-11-28 11:34:31,144 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2018-11-28 11:34:31,144 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2018-11-28 11:34:31,144 INFO L130 ssoRankerPreferences]: Path of dumped script: [2018-11-28 11:34:31,144 INFO L131 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1b_true-no-overflow_true-termination_true-valid-memsafety.c_Iteration8_Loop [2018-11-28 11:34:31,144 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2018-11-28 11:34:31,144 INFO L282 LassoAnalysis]: Starting lasso preprocessing... [2018-11-28 11:34:31,145 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:34:31,148 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:34:31,148 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:34:31,152 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:34:31,154 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:34:31,155 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2018-11-28 11:34:31,170 INFO L300 LassoAnalysis]: Preprocessing complete. [2018-11-28 11:34:31,170 INFO L497 LassoAnalysis]: Using template 'affine'. [2018-11-28 11:34:31,170 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 11:34:31,171 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 11:34:31,171 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 11:34:31,171 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 11:34:31,171 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 11:34:31,171 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 11:34:31,171 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 11:34:31,171 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 11:34:31,172 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 11:34:31,172 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 11:34:31,172 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 11:34:31,172 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 11:34:31,172 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 11:34:31,173 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 11:34:31,173 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 11:34:31,173 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 11:34:31,173 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 11:34:31,173 INFO L530 LassoAnalysis]: Proving termination failed for this template and these settings. [2018-11-28 11:34:31,174 INFO L122 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2018-11-28 11:34:31,174 INFO L339 nArgumentSynthesizer]: Template has degree 0. [2018-11-28 11:34:31,174 INFO L352 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2018-11-28 11:34:31,174 INFO L205 nArgumentSynthesizer]: 1 stem disjuncts [2018-11-28 11:34:31,174 INFO L206 nArgumentSynthesizer]: 1 loop disjuncts [2018-11-28 11:34:31,174 INFO L207 nArgumentSynthesizer]: 2 template conjuncts. [2018-11-28 11:34:31,175 INFO L402 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2018-11-28 11:34:31,175 INFO L403 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2018-11-28 11:34:31,176 INFO L421 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2018-11-28 11:34:31,177 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2018-11-28 11:34:31,178 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2018-11-28 11:34:31,178 INFO L437 nArgumentSynthesizer]: Simplifying supporting invariants... [2018-11-28 11:34:31,178 INFO L440 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2018-11-28 11:34:31,178 INFO L518 LassoAnalysis]: Proved termination. [2018-11-28 11:34:31,178 INFO L520 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] [2018-11-28 11:34:31,178 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2018-11-28 11:34:31,195 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:34:31,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:34:31,217 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 11:34:31,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:34:31,251 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 11:34:31,309 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-11-28 11:34:31,309 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 9 loop predicates [2018-11-28 11:34:31,309 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 92 states and 114 transitions. cyclomatic complexity: 26 Second operand 11 states. [2018-11-28 11:34:31,346 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 92 states and 114 transitions. cyclomatic complexity: 26. Second operand 11 states. Result 100 states and 122 transitions. Complement of second has 7 states. [2018-11-28 11:34:31,346 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 2 stem states 1 non-accepting loop states 1 accepting loop states [2018-11-28 11:34:31,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-11-28 11:34:31,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 15 transitions. [2018-11-28 11:34:31,346 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 15 transitions. Stem has 29 letters. Loop has 24 letters. [2018-11-28 11:34:31,346 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 11:34:31,346 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-28 11:34:31,352 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:34:31,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:34:31,371 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 11:34:31,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:34:31,403 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 11:34:31,457 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-11-28 11:34:31,457 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 9 loop predicates [2018-11-28 11:34:31,457 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 92 states and 114 transitions. cyclomatic complexity: 26 Second operand 11 states. [2018-11-28 11:34:31,491 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 92 states and 114 transitions. cyclomatic complexity: 26. Second operand 11 states. Result 100 states and 122 transitions. Complement of second has 7 states. [2018-11-28 11:34:31,491 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 2 stem states 1 non-accepting loop states 1 accepting loop states [2018-11-28 11:34:31,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-11-28 11:34:31,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 15 transitions. [2018-11-28 11:34:31,492 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 15 transitions. Stem has 29 letters. Loop has 24 letters. [2018-11-28 11:34:31,492 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 11:34:31,492 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-28 11:34:31,499 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:34:31,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:34:31,517 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 11:34:31,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:34:31,543 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 11:34:31,604 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-11-28 11:34:31,604 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 9 loop predicates [2018-11-28 11:34:31,604 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 92 states and 114 transitions. cyclomatic complexity: 26 Second operand 11 states. [2018-11-28 11:34:31,768 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 92 states and 114 transitions. cyclomatic complexity: 26. Second operand 11 states. Result 257 states and 303 transitions. Complement of second has 31 states. [2018-11-28 11:34:31,769 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 11 states 2 stem states 8 non-accepting loop states 1 accepting loop states [2018-11-28 11:34:31,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-11-28 11:34:31,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 38 transitions. [2018-11-28 11:34:31,769 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 38 transitions. Stem has 29 letters. Loop has 24 letters. [2018-11-28 11:34:31,770 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 11:34:31,770 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2018-11-28 11:34:31,790 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-28 11:34:31,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:34:31,818 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 11:34:31,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-28 11:34:31,856 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-28 11:34:31,938 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2018-11-28 11:34:31,938 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and with honda bouncer for loop.2 stem predicates 9 loop predicates [2018-11-28 11:34:31,938 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 92 states and 114 transitions. cyclomatic complexity: 26 Second operand 11 states. [2018-11-28 11:34:32,246 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 92 states and 114 transitions. cyclomatic complexity: 26. Second operand 11 states. Result 409 states and 515 transitions. Complement of second has 80 states. [2018-11-28 11:34:32,247 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 15 states 2 stem states 12 non-accepting loop states 1 accepting loop states [2018-11-28 11:34:32,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-11-28 11:34:32,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 49 transitions. [2018-11-28 11:34:32,248 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 15 states and 49 transitions. Stem has 29 letters. Loop has 24 letters. [2018-11-28 11:34:32,248 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 11:34:32,249 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 15 states and 49 transitions. Stem has 53 letters. Loop has 24 letters. [2018-11-28 11:34:32,249 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 11:34:32,249 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 15 states and 49 transitions. Stem has 29 letters. Loop has 48 letters. [2018-11-28 11:34:32,250 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2018-11-28 11:34:32,250 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 409 states and 515 transitions. [2018-11-28 11:34:32,254 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 62 [2018-11-28 11:34:32,256 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 409 states to 253 states and 345 transitions. [2018-11-28 11:34:32,257 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 154 [2018-11-28 11:34:32,257 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 164 [2018-11-28 11:34:32,257 INFO L73 IsDeterministic]: Start isDeterministic. Operand 253 states and 345 transitions. [2018-11-28 11:34:32,257 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2018-11-28 11:34:32,257 INFO L705 BuchiCegarLoop]: Abstraction has 253 states and 345 transitions. [2018-11-28 11:34:32,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states and 345 transitions. [2018-11-28 11:34:32,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 216. [2018-11-28 11:34:32,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2018-11-28 11:34:32,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 270 transitions. [2018-11-28 11:34:32,265 INFO L728 BuchiCegarLoop]: Abstraction has 216 states and 270 transitions. [2018-11-28 11:34:32,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-11-28 11:34:32,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2018-11-28 11:34:32,265 INFO L87 Difference]: Start difference. First operand 216 states and 270 transitions. Second operand 8 states. [2018-11-28 11:34:32,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-28 11:34:32,315 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2018-11-28 11:34:32,316 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-11-28 11:34:32,317 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 35 states and 37 transitions. [2018-11-28 11:34:32,317 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2018-11-28 11:34:32,317 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 35 states to 0 states and 0 transitions. [2018-11-28 11:34:32,317 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2018-11-28 11:34:32,317 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2018-11-28 11:34:32,317 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2018-11-28 11:34:32,317 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2018-11-28 11:34:32,318 INFO L705 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-28 11:34:32,318 INFO L728 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-28 11:34:32,318 INFO L608 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-28 11:34:32,318 INFO L442 BuchiCegarLoop]: ======== Iteration 9============ [2018-11-28 11:34:32,318 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2018-11-28 11:34:32,318 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2018-11-28 11:34:32,318 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2018-11-28 11:34:32,324 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 28.11 11:34:32 BoogieIcfgContainer [2018-11-28 11:34:32,324 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2018-11-28 11:34:32,324 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-28 11:34:32,324 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-28 11:34:32,325 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-28 11:34:32,325 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 11:34:21" (3/4) ... [2018-11-28 11:34:32,329 INFO L147 WitnessPrinter]: No result that supports witness generation found [2018-11-28 11:34:32,330 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-28 11:34:32,330 INFO L168 Benchmark]: Toolchain (without parser) took 11238.28 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 198.7 MB). Free memory was 953.3 MB in the beginning and 1.1 GB in the end (delta: -98.4 MB). Peak memory consumption was 100.3 MB. Max. memory is 11.5 GB. [2018-11-28 11:34:32,332 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 1.0 GB. Free memory is still 979.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 11:34:32,332 INFO L168 Benchmark]: CACSL2BoogieTranslator took 136.61 ms. Allocated memory is still 1.0 GB. Free memory was 953.3 MB in the beginning and 942.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2018-11-28 11:34:32,332 INFO L168 Benchmark]: Boogie Procedure Inliner took 17.87 ms. Allocated memory is still 1.0 GB. Free memory is still 942.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 11:34:32,332 INFO L168 Benchmark]: Boogie Preprocessor took 9.43 ms. Allocated memory is still 1.0 GB. Free memory was 942.6 MB in the beginning and 939.9 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. [2018-11-28 11:34:32,333 INFO L168 Benchmark]: RCFGBuilder took 158.90 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 127.9 MB). Free memory was 939.9 MB in the beginning and 1.1 GB in the end (delta: -176.8 MB). Peak memory consumption was 13.3 MB. Max. memory is 11.5 GB. [2018-11-28 11:34:32,333 INFO L168 Benchmark]: BuchiAutomizer took 10907.31 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 70.8 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 62.3 MB). Peak memory consumption was 133.1 MB. Max. memory is 11.5 GB. [2018-11-28 11:34:32,334 INFO L168 Benchmark]: Witness Printer took 5.32 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-28 11:34:32,336 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 1.0 GB. Free memory is still 979.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 136.61 ms. Allocated memory is still 1.0 GB. Free memory was 953.3 MB in the beginning and 942.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 17.87 ms. Allocated memory is still 1.0 GB. Free memory is still 942.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 9.43 ms. Allocated memory is still 1.0 GB. Free memory was 942.6 MB in the beginning and 939.9 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 11.5 GB. * RCFGBuilder took 158.90 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 127.9 MB). Free memory was 939.9 MB in the beginning and 1.1 GB in the end (delta: -176.8 MB). Peak memory consumption was 13.3 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 10907.31 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 70.8 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 62.3 MB). Peak memory consumption was 133.1 MB. Max. memory is 11.5 GB. * Witness Printer took 5.32 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 12 terminating modules (5 trivial, 5 deterministic, 2 nondeterministic). One deterministic module has affine ranking function \old(j) and consists of 11 locations. One deterministic module has affine ranking function \old(i) and consists of 4 locations. One deterministic module has affine ranking function \old(i) and consists of 5 locations. One deterministic module has affine ranking function org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@6d303f22 and consists of 11 locations. One deterministic module has affine ranking function i and consists of 5 locations. One nondeterministic module has affine ranking function \old(i) and consists of 5 locations. One nondeterministic module has affine ranking function \old(i) and consists of 15 locations. 5 modules have a trivial ranking function, the largest among these consists of 10 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 10.8s and 9 iterations. TraceHistogramMax:5. Analysis of lassos took 7.5s. Construction of modules took 0.6s. Büchi inclusion checks took 2.4s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 11. Automata minimization 0.0s AutomataMinimizationTime, 11 MinimizatonAttempts, 249 StatesRemovedByMinimization, 11 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 314 states and ocurred in iteration 5. Nontrivial modules had stage [5, 0, 1, 1, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 38/58 HoareTripleCheckerStatistics: 288 SDtfs, 336 SDslu, 538 SDs, 0 SdLazy, 951 SolverSat, 311 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time LassoAnalysisResults: nont0 unkn0 SFLI1 SFLT3 conc0 concLT3 SILN0 SILU0 SILI0 SILT1 lasso0 LassoPreprocessingBenchmarks: Lassos: inital11 mio100 ax100 hnf98 lsp100 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq157 hnf92 smp100 dnf100 smp100 tf112 neg100 sie110 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 8ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 14 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 7 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 5.4s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...