fact: Axiom branching_bit_spec: forall k1 k2, k1 <> k2 -> exists n, is_mask (branching_bit k1 k2) n /\ (forall p, (p < n)%nat -> testbit k1 p = testbit k2 p) /\ (testbit k1 n <> testbit k2 n).
imports: Lia Cdcl.Coqlib