RED(Region-Encoding Diagram) is an integrated symbolic TCTL model-checker/simulator for timed automata with CRD (Clock-Restriction Diagram) technology and linear hybrid automata with HRD (Hybrid-Restriction Diagram) technology. In order to share the symbolic verification technology of RED for dense-time systems and linear hybrid systems, develop more other applications on RED, and provide a more flexible and efficient way of formal method construction. We construct the library interface of RED, REDLIB, and do an experiment with JPetStore which is a completely new implementation of Pet Store demo application written in Java. This experiment demonstrates how to use REDLIB to construct verification applications.