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Proof step 9 from proof validref-put-norefval (previous step)

fs = mkfs(class, ty0, fieldvar), validref(str, r, ty, st), okval(val, ty0) ⊦ fs ' = _length, ty0 = void_type, validref(str, r, ty, st[r1 -- fs ', val]), is_referencevalue(val)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 8:
validref(str, r, ty, st), okval(val, ty0) ⊦ mkfs(class, ty0, fieldvar) ' = _length, ty0 = void_type, validref(str, r, ty, st[r1 -- mkfs(class, ty0, fieldvar) ', val]), is_referencevalue(val)

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ()]]