| st ⊆ st0, a2 ∈ st[a, d][a0, d0], a2 ∈ st0[a, d][a0, d0] ⊦ a2 = a1, st[a, d][a0, d0][a2] = st0[a, d][a0, d0][a2] |
st ⊆ st0, a2 ∈ st[a, d][a0, d0], a2 ∈ st0[a, d][a0, d0] ⊦ a2 = a0, a2 = a1, st[a, d][a0, d0][a2] = st0[a, d][a0, d0][a2]
Used simplifier rules: At-same: ⊦ st[a, d][a] = d; Used formulas: a2 = a0