Formal Verification at Higher Levels of Abstraction

Abstract — Most formal verification tools on the market convert a high-level register transfer level (RTL) design into a bit-level model. Algorithms that operate at the bit-level are unable to exploit the structure provided by the higher abstraction levels, and thus, are less scalable. This tutorial surveys recent advances in formal verification using high-level models. We present word-level verification with predicate abstraction and satisfiability modulo theories (SMT) solvers. We then describe techniques for term-level modeling and ways to combine word-level and term-level approaches for scalable verification. I