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Proof step 29 from proof reffield-del (previous step)

is_reftype(ty), mkfs(class, ty, fieldvar) ' ∈ instfields(st[r0 -- _type] .type .class), is_obj(r0, st) ⊦ r0 = r, ∃ fs. fs ' ∈ instfields(st[r0 -- _type] .type .class) ∧ is_reftype(fs .type)

Heuristic quantifier closing applied rule exists right

And closed the goal!

Rule argument

[EXRARG : pos: right 2, [QUANTTERMLIST : (mkfs(class, ty, fieldvar))]]

Additional information

[[CONCRETESIMPRULES : ([CSIMPSEQ : ⊦ mkfs(class, ty, fieldvar) .type = ty])], [EXTRATERMS : (mkfs(class, ty, fieldvar))]]