⊦ R0 = R1 ↔ (∀ rs, f, g. R0[rs, f, g] ↔ R1[rs, f, g])
[[CONCRETESIMPRULES : ()], [EXTRATERMS : (⌜bv⌝ ∧ emp, a[⌜bv⌝ ] ∧ emp)]]