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Proof step 7 from proof validrefs-put-badclassfield (previous step)

is_classtype(st[r0 -- _type] .type), validrefs(str, r ', ty, st[r0 -- fs ', val]) ⊦ fs ' = _type, fs ' ∈ instfields(st[r0 -- _type] .type .class), junkref(str, r, st), validrefs(str, r ', ty, st)

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 2:
⊦ validrefs(str, r ', ty, st) ↔ r = jvmref ∨ r ≠ jvmref ∧ is_valid_ref(str, r, st) ∧ st[r -- _type] .type ≤ ty
Proof step 6:
is_classtype(st[r0 -- _type] .type), r = jvmref ∨ r ≠ jvmref ∧ is_valid_ref(str, r, st[r0 -- fs ', val]) ∧ (st[r0 -- fs ', val][r -- _type]) .type ≤ ty ⊦ fs ' = _type, fs ' ∈ instfields(st[r0 -- _type] .type .class), junkref(str, r, st), validrefs(str, r ', ty, st)

Rule argument

[crewrite-arg: validrefs-one , F , [st, ty, r, str] → [st[r0 -- fs ', val], ty, r, str] ]

Additional information

[[CONCRETESIMPRULES : ()], [EXTRATERMS : (st[r0 -- fs ', val], ty, r, str)]]