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Proof step 6 from proof junkref-put-field (previous step)

mkfs(class, ty, fieldvar) ' ∈ instfields(st[r -- _type] .type .class), st[r0 -- _type] .type ≤ ty, is_obj(r, st), junkrefs(str, r ' + refs0, (st[r -- mkfs(class, ty, fieldvar) ', refval(r0)][r -- _type]) .type, st[r -- mkfs(class, ty, fieldvar) ', refval(r0)]), junkrefs(str, r ' + refs0, (st[r -- mkfs(class, ty, fieldvar) ', refval(r0)][r -- _type]) .type, st) ⊦ r0 = jvmref, junkref(str, r0, st), ∃ refs. refs ≠ [] ∧ refs .first = r ∧ junkrefs(str, refs, st[refs .first -- _type] .type, st)

User applied rule exists right

And obtained the following new goals

Proof step 5:
mkfs(class, ty, fieldvar) ' ∈ instfields(st[r -- _type] .type .class), st[r0 -- _type] .type ≤ ty, is_obj(r, st), junkrefs(str, r ' + refs0, (st[r -- mkfs(class, ty, fieldvar) ', refval(r0)][r -- _type]) .type, st[r -- mkfs(class, ty, fieldvar) ', refval(r0)]), junkrefs(str, r ' + refs0, (st[r -- mkfs(class, ty, fieldvar) ', refval(r0)][r -- _type]) .type, st) ⊦ r0 = jvmref, junkref(str, r0, st), r ' + refs0 ≠ [] ∧ (r ' + refs0) .first = r ∧ junkrefs(str, r ' + refs0, st[(r ' + refs0) .first -- _type] .type, st)

Rule argument

[EXRARG : pos: right 3, [extquanttermlist: (r ' + refs0) abort:F , discard:T , computed:F ]]

Additional information

[[CONCRETESIMPRULES : ()], [EXTRATERMS : (r ' + refs0)]]