9. A data management computing device comprising: a processor; and a memory coupled to the processor which is configured to be capable of executing programmed instructions comprising and stored in the memory to: extract a set of textual attributes and a set of textual attribute properties from a requirement specification; frame a constraint representation syntax from the extracted set of attribute properties; model a structured diagram from the framed constraint representation syntax and a set of use cases; construct a set of path predicates from the structured diagram; determine one or more attribute classes from the set of path predicates based on an attribute constraint and an attribute dependency; generate the negative test input data for the one or more attribute classes; and execute the generated negative test input data to test a model of an application.
9. A data management computing device comprising: a processor; and a memory coupled to the processor which is configured to be capable of executing programmed instructions comprising and stored in the memory to: extract a set of textual attributes and a set of textual attribute properties from a requirement specification; frame a constraint representation syntax from the extracted set of attribute properties; model a structured diagram from the framed constraint representation syntax and a set of use cases; construct a set of path predicates from the structured diagram; determine one or more attribute classes from the set of path predicates based on an attribute constraint and an attribute dependency; generate the negative test input data for the one or more attribute classes; and execute the generated negative test input data to test a model of an application. 15. The device of claim 9 , wherein the processor coupled to the memory is further configured to be capable of executing additional programmed instructions comprising and stored in the memory to: identify an attribute test data as the negative test input data when the attribute test data complies negatively with an attribute constraint of a path predicate.