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Proof step 21 from proof fits-superset (previous step)

st[r -- sk] = refval(r0), r -- _type ∈ st, r ∈ st, sk ∈ instfields(st[r -- _type] .type .class), is_classtype(st[r -- _type] .type), fits(r0, sks0, st), st ⊆ st0, is_obj(str, r, st), r -- sk ∈ st, ∀ st, st0, r, str. st ⊆ st0 ∧ fits(r, sks0, st) → junkref(str, r, st) ∨ fits(r, sks0, st0) ⊦ r = jvmref, junkref(str, r, st), fits(r0, sks0, st0)

User applied rule all left

And obtained the following new goals

Rule argument

[EXRARG : pos: left 10, [extquanttermlist: (st, st0, r0, str) abort:F , discard:T , computed:T ]]

Additional information

[[CONCRETESIMPRULES : ()], [EXTRATERMS : (st, st0, r0, str)]]