Hi,
On the latest revision, z3 gives wrong answer on the following file:

qf_uflia.smt2.zip

$ z3 qf_uflia.smt2
sat
sat
unsat

CVC4 return:
sat
sat
sat

OS:
NAME="Ubuntu"
VERSION="16.04.5 LTS (Xenial Xerus)"
ID=ubuntu
ID_LIKE=debian
PRETTY_NAME="Ubuntu 16.04.5 LTS"
VERSION_ID="16.04"

$ git log -1
commit 1fff7bb
Author: Lev Nachmanson [email protected]
Date: Mon Dec 30 17:58:56 2019 -0800
use u_map in lar_term
Signed-off-by: Lev Nachmanson [email protected]