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Proof step 28 from proof junkref-put-badfield (previous step)

junkrefs(str, r ' + refs0, (st[r0 -- fs ', val][r -- _type]) .type, st[r0 -- fs ', val]) ⊦ junkref(str, r, st), is_typevalue(st[r0 -- _type]) ∧ is_reftype(st[r0 -- _type] .type)

Heuristic weak cut applied rule cut formula

And obtained the following new goals

Proof step 20:
r -- _type = r0 -- fs ', junkrefs(str, r ' + refs0, (st[r0 -- fs ', val][r -- _type]) .type, st[r0 -- fs ', val]) ⊦ junkref(str, r, st), is_typevalue(st[r0 -- _type]) ∧ is_reftype(st[r0 -- _type] .type)
Proof step 27:
junkrefs(str, r ' + refs0, (st[r0 -- fs ', val][r -- _type]) .type, st[r0 -- fs ', val]) ⊦ r -- _type = r0 -- fs ', junkref(str, r, st), is_typevalue(st[r0 -- _type]) ∧ is_reftype(st[r0 -- _type] .type)

Rule argument

[fma-arg: r -- _type = r0 -- fs ']

Additional information

[[CONCRETESIMPRULES : ()], [EXTRAFMAS : (r -- _type = r0 -- fs ')]]