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Proof step 2 from proof good-field-01 (conclusion)

⊦ goodfieldandtype(r, mkfs(class1, ty, fieldvar) ', st) ↔ ¬ ¬ (r -- mkfs(class1, ty, fieldvar) ' ∈ st ∧ okval(st[r -- mkfs(class1, ty, fieldvar) '], ty))

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 1:
⊦ goodfieldandtype(r, mkfs(class1, ty, fieldvar) ', st) ↔ r -- mkfs(class1, ty, fieldvar) ' ∈ st ∧ okval(st[r -- mkfs(class1, ty, fieldvar) '], ty)

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ()]]