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Proof step 8 from proof junkrefs-subset (previous step)

st[r -- _type] .type ≤ ty, ∀ rk. rk ∈ st → rk ∈ st1 ∧ st[rk] = st1[rk], junkrefs(str, r ' + acc, ty, st1), is_obj(str, r, st), ∀ str, ty, st1, st. junkrefs(str, acc, ty, st1) ∧ st ⊆ st1 → junkrefs(str, acc, ty, st) ⊦ r = jvmref, st1[r -- _type] .type ≤ ty, acc ≠ [] ∧ (∃ fs. fs ' ∈ instfields(st[r -- _type] .type .class) ∧ is_referencevalue(st[r -- fs ']) ∧ acc .first = st[r -- fs '] .refval ∧ junkrefs(str, acc, fs .type, st))

User applied rule all left

And closed the goal!

Rule argument

[EXRARG : pos: left 2, [extquanttermlist: (r -- _type) abort:F , discard:F , computed:T ]]

Additional information

[[CONCRETESIMPRULES : ([CSIMPSEQ : ⊦ ¬ r -- _type ∈ st → ¬ is_obj(str, r, st)], [CSIMPFORWARD : ⊦ r -- sk ∈ st → r ∈ st])], [EXTRATERMS : (r -- _type)]]