Chacha20poly1305.add16_not_lt: law of bend-collections-laws-crypto@1.0.0.0
Import: import bend-collections-laws-crypto@1.0.0.0/proofs/crypto/aead/chacha20poly1305.bend as Chacha20poly1305
Lines 216-219 of bend-collections-laws-crypto@1.0.0.0/proofs/crypto/aead/chacha20poly1305.bend: https://jend.leeeet.dev/read.txt?path=bend-collections-laws-crypto@1.0.0.0/proofs/crypto/aead/chacha20poly1305.bend&start_line=216&end_line=219

import Base

# a + 16 is not below 16, and (a + 16) - 16 == a.
law add16_not_lt:
  for +a: Nat
  {Nat.is_lt(Nat.add(a, 16n), 16n) == False{} : Bool}

Uses (6):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Bool
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat.add
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat.is_lt
  https://jend.leeeet.dev/definition.txt?path=bend-collections-laws-crypto@1.0.0.0/proofs/lib/nat.bend&name=add_comm
  https://jend.leeeet.dev/definition.txt?path=bend-collections-laws-crypto@1.0.0.0/proofs/lib/nat.bend&name=not_lt_zero