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Proof step 7 from proof okfieldinits-index (previous step)

is_indexkey(sk), is_fskey(sk1) ∧ val = initial_value(sk1 .fs .type) ∧ sk1 .fs .class = class ∧ sk1 .fs .type ≠ abstract_type ∧ okfieldinits(class, fis0), ∀ sk0, class0. ¬ sk0 ∈ fis0 .keys ∨ ¬ okfieldinits(class0, fis0) ∨ is_fskey(sk0) ⊦ sk ≠ sk1 ∧ ¬ sk ∈ fis0 .keys

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 6:
is_indexkey(sk), is_fskey(sk1), okfieldinits(sk1 .fs .class, fis0), sk ∈ fis0 .keys, ∀ sk0, class0. ¬ sk0 ∈ fis0 .keys ∨ ¬ okfieldinits(class0, fis0) ∨ is_fskey(sk0) ⊦ sk1 .fs .type = abstract_type, sk = sk1

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ([CSIMPSEQ : ⊦ is_indexkey(sk) → ¬ is_fskey(sk)])]]