| validrefs(str, refs, ty, addobj(r, class, fis, st)) ⊦ validrefs(str, refs, ty, st), r ∈ refs |
⊦ validrefs(str, [], ty, st)
∀ str, ty, r, class, fis, st. validrefs(str, acc, ty, addobj(r, class, fis, st)) → validrefs(str, acc, ty, st) ∨ r ∈ acc, validrefs(str, r0 + acc, ty, addobj(r, class, fis, st)) ⊦ validrefs(str, r0 + acc, ty, st), r ∈ r0 + acc
[[CONCRETESIMPRULES : ([CSIMPGEN : references generated by [], +;])]]