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Proof step 11 from proof unchanged-field-lookup (previous step)

is_obj(str, r, st), sk ∈ instfields(st[r -- _type] .type .class), unchanged(str, r, st, st1) ⊦ r = jvmref, st[r -- sk] = st1[r -- sk]

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 1:
⊦ is_indexkey(sk) → ¬ sk ∈ instfields(class)
Proof step 10:
¬ is_indexkey(sk), is_obj(str, r, st), sk ∈ instfields(st[r -- _type] .type .class), unchanged(str, r, st, st1) ⊦ r = jvmref, st[r -- sk] = st1[r -- sk]

Rule argument

[x0lemmaarg: spec-name: addfuns instance-name: lemma-name: instfields-index-01 antecedent: succedent: is_indexkey(sk) → ¬ sk ∈ instfields(class) substlist: [class, sk] → [st[r -- _type] .type .class, sk] add preconditions?: F is rewrite lemma?: T current spec?: F rotate lemma?: F replace all?: T paths: ((0)) dummy: () ]

Additional information

[[CONCRETESIMPRULES : ()], [EXTRATERMS : (st[r -- _type] .type .class, sk)]]