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Proof step 10 from proof validref-put-field-any (previous step)

sk = fs ', validref(str, r, ty, st), is_fskey(sk), is_referencevalue(val) → validref(str, val .refval, fs .type, st) ∧ is_reftype(fs .type), ¬ is_referencevalue(val) → okval(val, fs .type) ∧ fs .type ≠ void_type ∧ sk ≠ _length ⊦ validref(str, r, ty, st[r0 -- sk, val])

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 9:
validref(str, r, ty, st), is_referencevalue(val) → validref(str, val .refval, fs .type, st) ∧ is_reftype(fs .type), ¬ is_referencevalue(val) → okval(val, fs .type) ∧ fs .type ≠ void_type ∧ fs ' ≠ _length ⊦ validref(str, r, ty, st[r0 -- fs ', val])

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ([CSIMPSEQ : ⊦ is_fskey(fs ')])]]