The Solidity compiler implements several [optimization rules](https://github.com/ethereum/solidity/blob/develop/libevmasm/RuleList.h).
This directory contains an effort to formally prove the correctness of those rules in:
- HOL with [EthIsabelle](https://github.com/ekpyron/eth-isabelle)
- FOL with SMT solvers using [Integers and BitVectors](http://smtlib.cs.uiowa.edu/theories.shtml)