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Proof step 20 from proof junkrefs-delete (previous step)

¬ (is_array(str, r0, st) ∧ st[r0 -- _type] .type ≤ ty), junkrefs(str, r0 ' + acc, ty, st -- r), is_valid_ref(str, r0, st), st[r0 -- _type] .type ≤ ty, ∀ str, ty, st, r. junkrefs(str, acc, ty, st -- r) → r ∈ acc ∨ junkrefs(str, acc, ty, st) ⊦ r0 = jvmref, r = r0, junkrefs(str, r0 ' + acc, ty, st), r ∈ acc

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 19:
st[r0 -- _type] .type ≤ ty, junkrefs(str, r0 ' + acc, ty, st -- r), is_obj(str, r0, st), ∀ str, ty, st, r. junkrefs(str, acc, ty, st -- r) → r ∈ acc ∨ junkrefs(str, acc, ty, st) ⊦ r0 = jvmref, r = r0, junkrefs(str, r0 ' + acc, ty, st), r ∈ acc

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ([CSIMPSEQ : ⊦ is_obj(str, r, st) → ¬ is_array(str, r, st)], [CSIMPSEQ : ⊦ ¬ is_array(str, r, st) → ( is_valid_ref(str, r, st) ↔ is_obj(str, r, st))])]]