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Proof step 8 from proof junkrefs-put-notin-butlast (previous step)

r -- fs ' ∈ st, okval(st[r -- fs '], fs .type), okval(val, fs .type), r ∈ st ⊦ fs ' = _type, fs ' = _length, junkrefs(str, r ', ty, st[r -- fs ', val]) ↔ r ≠ jvmref ∧ (¬ is_valid_ref(str, r, st) ∨ ¬ st[r -- _type] .type ≤ ty)

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 2:
⊦ junkrefs(str, r ', ty, st) ↔ r ≠ jvmref ∧ (¬ is_valid_ref(str, r, st) ∨ ¬ st[r -- _type] .type ≤ ty)
Proof step 7:
r -- fs ' ∈ st, okval(st[r -- fs '], fs .type), okval(val, fs .type), r ∈ st ⊦ fs ' = _type, fs ' = _length, r ≠ jvmref ∧ (¬ is_valid_ref(str, r, st[r -- fs ', val]) ∨ ¬ (st[r -- fs ', val][r -- _type]) .type ≤ ty) ↔ r ≠ jvmref ∧ (¬ is_valid_ref(str, r, st) ∨ ¬ st[r -- _type] .type ≤ ty)

Rule argument

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

Additional information

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