law step_ok

lawful-bytes@0.1.1.0 · proof_append.bend:173

import Base
import lawful-bytes@0.1.1.0/defs.bend as D
import lawful-bytes@0.1.1.0/proof_core.bend as C
import lawful-arrays@0.1.0.0/proof_tree.bend as P

173law step_ok:
174  for +ld: U32
175  for +td: P.Tree<U32>
176  for +d: Nat
177  for +x: U32
178  for +k: Nat
179  for +hd: {D.ok(C.BT(ld, td), d) == True{} : Bool}
180  for +hc: {Nat.is_le(Nat.add(U32.to_nat(ld), 1n+k), D.cap(C.BT(ld, td))) == True{} : Bool}
181  {D.ok(C.BT((ld + 1 : U32), PT(ld, td, x)), d) == True{} : Bool}