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Proof step 5 from proof eqex-at (previous step)

eqex(st, st0, r) ⊦ r0 = r, st[r0 -- sk] = st0[r0 -- sk]

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 1:
⊦ eqex(st, st0, r) ↔ st -- r = st0 -- r
Proof step 4:
st -- r = st0 -- r ⊦ r0 = r, st[r0 -- sk] = st0[r0 -- sk]

Rule argument

[crewrite-arg: eqex, F, [r, st0, st] → [r, st0, st]]

Additional information

[[CONCRETESIMPRULES : ()], [EXTRATERMS : (r, st0, st)]]