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Proof step 8 from proof isobj-put-samefield-03 (previous step)

st[r -- _type] = typeval(mkclasstype(class0)), r ∈ st, r -- _type ∈ st, okval(val, ty), is_obj(r, class0, st) ⊦ r = jvmref, mkfs(class, ty, fieldvar) ' = _type, is_obj(r, class0, st[r -- mkfs(class, ty, fieldvar) ', val])

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 7:
⊦ is_obj(r, class, st) ∧ oktype(val, fs .type, st) ∧ fs ' ≠ _type → is_obj(r, class, st[r -- fs ', val])

Rule argument

[crewrite-arg: isobj-put-samefield-02 , F , [val, fs, st, class, r] → [val, mkfs(class, ty, fieldvar), st, class0, r] ]

Additional information

[[CONCRETESIMPRULES : ([CSIMPSEQ : ⊦ mkfs(class, ty, fieldvar) .type = ty], [CSIMPSEQ : ⊦ oktype(val, ty, st) ↔ okval(val, ty)])], [EXTRATERMS : (val, mkfs(class, ty, fieldvar), st, class0, r)]]