  We prove the termination of flips for 4-dimensional pseudo-effective NQC log
canonical generalized pairs. As main ingredients, we verify the termination of
flips for 3-dimensional NQC log canonical generalized pairs, and show that the
termination of flips for pseudo-effective NQC log canonical generalized pairs
which admit NQC weak Zariski decompositions follows from the termination of
flips in lower dimensions.
