Goal:
    G : t  HI : invariants  z : Z  H : 0 <= z
  ============================
   (Z.of_nat (to_label (Some z)) =
    Z.max (Z.of_nat (to_label (Some z))) (Z.of_nat (to_label None)))


DEBUG:Going to execute:
<coq-core.plugins.ssreflect::ssrrewrite@0> $1 $2

Goals:
    G : t  HI : invariants  z : Z  H : 0 <= z
  ============================
   (0 <= z)

    G : t  HI : invariants  z : Z  H : 0 <= z
  ============================
   (z = Z.max z (Z.of_nat (to_label None)))


DEBUG:Going to execute:
try lia
DEBUG LTAC Evaluated term: Z_of_to_label_pos
DEBUG LTAC Evaluated term: Z_of_to_label_pos