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Proof step 13 from proof validref-class-rec (previous step)

st[r -- mkfs(class, ty0, fieldvar) '] = refval(r0), mkfs(class, ty0, fieldvar) ' ∈ instfields(st[r -- _type] .type .class), is_obj(str, r, st), st[r -- _type] .type ≤ ty, ∀ fs. ¬ fs ' ∈ instfields(st[r -- _type] .type .class) ∨ ¬ is_referencevalue(st[r -- fs ']) ∨ st[r -- fs '] .refval = jvmref ∨ st[st[r -- fs '] .refval -- _type] .type ≤ fs .type ∧ validref(str, st[r -- fs '] .refval, fs .type, st) ⊦ r0 = jvmref, r = jvmref, st[r0 -- _type] .type ≤ ty0 ∧ ¬ junkref(str, r0, st)

User applied rule all left

And obtained the following new goals

Rule argument

[EXRARG : pos: left 5, [extquanttermlist: (mkfs(class, ty0, fieldvar)) abort:F , discard:T , computed:T ]]

Additional information

[[CONCRETESIMPRULES : ([CSIMPSEQ : ⊦ mkfs(class, ty, fieldvar) .type = ty], [CSIMPSEQ : ⊦ is_referencevalue(refval(r))], [CSIMPSEQ : ⊦ refval(r) .refval = r])], [EXTRATERMS : (mkfs(class, ty0, fieldvar))]]