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Proof step 15 from proof validref-put-refval (previous step)

fs = mkfs(class, ty1, fieldvar), is_reftype(ty1), ty ≤ ty1, validref(str, r1, ty, st), validref(str, r, ty0, st) ⊦ validref(str, r, ty0, st[r0 -- fs ', refval(r1)])

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 14:
is_reftype(ty1), ty ≤ ty1, validref(str, r1, ty, st), validref(str, r, ty0, st) ⊦ validref(str, r, ty0, st[r0 -- mkfs(class, ty1, fieldvar) ', refval(r1)])

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ()]]