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Proof step 26 from proof validfieldinits-rec (conclusion)

⊦ validfieldinits(str, fv ' + fis, st) ↔ is_fskey(fv .1) ∧ validval(str, fv .2, fv .1 .fs .type, st) ∧ type∃(str, fv .1 .fs .type) ∧ validfieldinits(str, fis, st)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 25:
⊦ validfieldinits(str, fv ' + fis, st) ↔ ¬ is_indexkey(fv .1) ∧ validval(str, fv .2, fv .1 .fs .type, st) ∧ type∃(str, fv .1 .fs .type) ∧ validfieldinits(str, fis, st)

Rule argument

[emptyarg]

Additional information

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