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

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

Heuristic simplifier applied rule simplifier

And obtained the following new goals

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

Rule argument

[emptyarg]

Additional information

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