x = i0 + x1, i < min(x), i ∈ x, ∀ x0, i. # x0 < # x → (i ∈ x0 ∧ i < min(x0) → false) ⊦
[[CONCRETESIMPRULES : ([CSIMPGEN : list generated by [], +;], [CSIMPSEQ : ⊦ ¬ d ∈ []])]]