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Proof step 3 from proof gft-not (previous step)

sk0 = fs ', oktype(val, fs .type, st), is_fskey(sk0), goodfieldandtype(r, sk, st) ⊦ sk0 = _type, goodfieldandtype(r, sk, st[r0 -- sk0, val])

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 2:
oktype(val, fs .type, st), goodfieldandtype(r, sk, st) ⊦ fs ' = _type, goodfieldandtype(r, sk, st[r0 -- fs ', val])

Rule argument

[emptyarg]

Additional information

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