"Z3 is a cat with a funny hat" -TheLemonMan
NimZ3 is an early stage Nim binding for the Z3 theorem prover
This is still a work in progress and a lot of Z3 is still missing, but the most important basics are available:
- bool, bit vector, int and float types
The API uses template magic to hide Z3 contexts and allows normal Nim syntax for defining Z3 model assertions.
z3: let x = Int("x") let y = Int("y") let z = Int("z") let s = Solver() s.assert 3 * x + 2 * y - z == 1 s.assert 2 * x - 2 * y + 4 * z == -2 s.assert x * -1 + y / 2 - z == 0 s.check_model: echo model
z -> (- 2) y -> (- 2) x -> 1
More examples are available in the tests directory, run with
More Z3 info
Some helpful documents and tutorials about Z3:
Things I'm not sure how to solve yet. Any input appreciated:
Should there be distinct types for signed and unsigned bit vectors? This would make it easier to implement operators for things like Z3_mk_bvXXX_no_overflow()
What is a good way to create Z3 consts? The current method of doing
let x = Int "x"is redundant and prone to mistakes. Is it better to create some kind of declaration template instead?