| [:S | [PL S = s] ∥nf [PL R2(pm, S', S'') -+-> (last ⊃ Post2(pm, s1, S);G2(pm, S, S'))]], RG-restr(pm, R1, G1, Pre1, Post1, I, R2, G2, Pre2, Post2), R1(pm, s0, S), ¬ R1(pm, s0, s), I(pm, s0), Pre1(pm, s1), Pre2(pm, s1) ⊦ (R1(pm, S', S'') ∧ R2(pm, S', S'')) -+-> (last ⊃ Post1(pm, s1, S) ∧ Post2(pm, s1, S);G1(pm, S, S') ∨ G2(pm, S, S')) |