| refs = r + refs0, okbytearray(r, st), validrefs(str, refs, mkclasstype(`java.lang.Object' .class), st) ⊦ r = refs .last, refs = [] |
okbytearray(r, st), validrefs(str, r ' + refs0, mkclasstype(`java.lang.Object' .class), st) ⊦ r = (r ' + refs0) .last
[[CONCRETESIMPRULES : ([CSIMPSEQ : ⊦ (refs + refs0) + refs1 = refs + refs0 + refs1], [CSIMPSEQ : ⊦ r ' + refs ≠ []], [CSIMPSEQ : ⊦ r + refs = r ' + refs])]]