1. A method for incrementally verifying a circuit design, the method comprising: (a) representing a first subset of modules in the circuit design by one or more interpretive computer programming modules, wherein the circuit design is used to manufacture integrated circuits; (b) representing a second subset of modules in the circuit design by one or more hardware descriptive language (HDL) modules; (c) performing simulation of a mixed design which represents the first subset of the circuit design by the one or more interpretive computer programming modules and represents the second subset of the circuit design by the one or more HDL modules; (d) translating a part of the first subset of modules into a HDL module to include the translated part in the second subset of modules and remove the translated part from the first subset of modules, responsive to the simulation of the mixed design being successful; and (e) repeating (a) through (d) at least once.