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Proof step 6 from proof good-field-subset (previous step)

fs = mkfs(class, ty, fieldvar), st ⊆ st0, r -- fs ' ∈ st, r ∈ st ⊦ r -- fs ' ∈ st0 ∧ okval(st0[r -- fs '], ty) ↔ okval(st[r -- fs '], ty)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 5:
st ⊆ st0, r -- mkfs(class, ty, fieldvar) ' ∈ st, r ∈ st ⊦ r -- mkfs(class, ty, fieldvar) ' ∈ st0 ∧ okval(st0[r -- mkfs(class, ty, fieldvar) '], ty) ↔ okval(st[r -- mkfs(class, ty, fieldvar) '], ty)

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ()]]