A service composition consists of multiple interacting Web Services that provide a functionality to meet a specific set of requirements. It is essential to verify that the functional behavior of the service composition meets the published functionality of the service. Instead of defining a new verification tool to verify the service composition we follow a transformation approach. In this approach, a service composition can be automatically transformed into a model understood by an available verification tool that can then be used to perform the formal verification. The goal in our research is to use different verification tools in order to verify a wide range of properties and target different kinds of systems. This is because different verification tools differ in their requirements and abilities. In this paper, we define the transformation rules to generate a model that can be verified using UPPAAL  model checking tool.