fact: Definition G2_4 := k_in <-$ {0, 1}^k; [b, f] <-$2 A _ _ (fun s a => b <- F k_in a; randomFunc_mem _ _ ({0, 1}^c) s (a, b)) nil; ret (b, funcCollision _ _ (fst (split f))).
imports: FCF PRF SplitVector cAU CompFold DetSem SemEquiv