1. A computer implemented method for performing verification of an integrated circuit, comprising: using a computer system which comprises at least one processor and is programmed for: reading a design description of the integrated circuit; replacing a multi-strength device in the design description with a replacement logic which accurately models the multi-strength device and comprises one or more encoded output signals, wherein at least one of the output signals is determined by comparing a first individual binary signal of a first input signal with a second individual binary signal of a second input signal, in which three or more individual binary signals are used to model multi-strength behavior of at least one of the first input signal and the second input signal, and the one or more encoded output signals model and present multiple strength behavior of the multi-strength device as a plurality of Boolean logic values; performing the verification by evaluating the design description together with the logic of the integrated circuit using a verification logic, wherein the verification logic comprises a process that does not consider strength information of the integrated circuit; and displaying the design description with the logic on a display apparatus or storing the design description with the logic in a computer readable storage medium or a storage device of the computer system.