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Proof step 21 from proof junkref-put-refval (previous step)

fs = mkfs(class, ty0, fieldvar), is_reftype(ty0), ty ≤ ty0, validref(str, r1, ty, st), junkref(str, r, st[r0 -- fs ', refval(r1)]) ⊦ junkref(str, r, st)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 20:
is_reftype(ty0), ty ≤ ty0, validref(str, r1, ty, st), junkref(str, r, st[r0 -- mkfs(class, ty0, fieldvar) ', refval(r1)]) ⊦ junkref(str, r, st)

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ()]]