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Proof step 14 from proof gengft (previous step)

sk0 = fs ', is_fskey(sk0), r -- mkfs(class, ty, fieldvar) ' ∈ st, okval(val, ty), r ∈ st, okval(st[r -- mkfs(class, ty, fieldvar) '], ty) ⊦ mkfs(class, ty, fieldvar) ' = _type, r0 -- sk0 ∈ st[r -- mkfs(class, ty, fieldvar) ', val] ∧ okval(st[r -- mkfs(class, ty, fieldvar) ', val][r0 -- sk0], fs .type) ↔ goodfieldandtype(r0, sk0, st)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 5:
⊦ goodfieldandtype(r, fs ', st) ↔ ¬ ¬ (r -- fs ' ∈ st ∧ okval(st[r -- fs '], fs .type))
Proof step 13:
r -- mkfs(class, ty, fieldvar) ' ∈ st, okval(val, ty), r ∈ st, okval(st[r -- mkfs(class, ty, fieldvar) '], ty) ⊦ mkfs(class, ty, fieldvar) ' = _type, r0 -- fs ' ∈ st[r -- mkfs(class, ty, fieldvar) ', val] ∧ okval(st[r -- mkfs(class, ty, fieldvar) ', val][r0 -- fs '], fs .type) ↔ r0 -- fs ' ∈ st ∧ okval(st[r0 -- fs '], fs .type)

Rule argument

[emptyarg]

Additional information

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