| junkrefs(str, refs, ty, st) ⊦ junkrefs(str, refs, ty, st -- r) |
⊦ ¬ junkrefs(str, [], ty, st)
∀ str, ty, st, r. junkrefs(str, acc, ty, st) → junkrefs(str, acc, ty, st -- r), junkrefs(str, r0 + acc, ty, st) ⊦ junkrefs(str, r0 + acc, ty, st -- r)
[[CONCRETESIMPRULES : ([CSIMPGEN : references generated by [], +;])]]