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Proof step 31 from proof validref-ac (previous step)

is_fskey(fv .1) ∧ fv .1 .fs .class ≠ class, ∀ str, r, ty, class, st. validref(str, r, ty, addclass(class, fis0, st)) ↔ validref(str, r, ty, st) ⊦ validref(str, r, ty, addclass(class, fis0, st)) ↔ validref(str, r, ty, st)

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 30:
is_fskey(fv .1), ∀ str, r, ty, class, st. validref(str, r, ty, addclass(class, fis0, st)) ↔ validref(str, r, ty, st) ⊦ fv .1 .fs .class = class, validref(str, r, ty, addclass(class, fis0, st)) ↔ validref(str, r, ty, st)

Rule argument

[emptyarg]

Additional information

[[CONCRETESIMPRULES : ()]]