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

st[r0 -- _type] .type = mkclasstype(class), is_classtype(st[r0 -- _type] .type), validref(str, r, ty, st) ⊦ fs ' = _type, fs ' ∈ instfields(class), validref(str, r, ty, st[r0 -- fs ', val])

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 8:
st[r0 -- _type] .type = mkclasstype(class), validref(str, r, ty, st) ⊦ fs ' = _type, validref(str, r, ty, st[r0 -- fs ', val]), fs ' ∈ instfields(class)

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ([CSIMPSEQ : ⊦ is_classtype(mkclasstype(class))])]]