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Proof step 18 from proof junkrefs-union-disjoint (previous step)

st1 .refs ∩ st .refs = ∅, r ∈ st1, junkrefs(str, r ', ty, st1 ∪ st) ⊦ junkrefs(str, r ', ty, st1)

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 1:
⊦ junkrefs(str, r ', ty, st) ↔ r ≠ jvmref ∧ (¬ is_valid_ref(str, r, st) ∨ ¬ st[r -- _type] .type ≤ ty)
Proof step 17:
st1 .refs ∩ st .refs = ∅, r ∈ st1, junkrefs(str, r ', ty, st1 ∪ st) ⊦ r ≠ jvmref ∧ (¬ is_valid_ref(str, r, st1) ∨ ¬ st1[r -- _type] .type ≤ ty)

Rule argument

[crewrite-arg: junkrefs-one, F, [st, ty, r, str] → [st1, ty, r, str]]

Additional information

[[CONCRETESIMPRULES : ()], [EXTRATERMS : (st1, ty, r, str)]]