law gen_cell
import minebender-game@1.0.0.0/proof_gen.bend as ProofGenimport Base
import minebender-game@1.0.0.0/types.bend as T
import minebender-game@1.0.0.0/game.bend as G
452law gen_cell:
453 for +z: G.Zone
454 for +p: T.Pos
455 for +st: G.GenState
456 for +lp: Nat
457 for inv: {Nat.is_le(st_need(st), st_left(st)) == True{} : Bool}
458 for lft: {st_left(st) == Nat.add(Bool.pick(Nat, G.gen.out(z, p), 0n, 1n), lp) : Nat}
459 GenStep(z, p, st, lp)