Add additional equality in theory_fpa

src/smt/theory_fpa.cpp

@@ -454,13 +454,9 @@ namespace smt {
                     expr * args[] = { bv_val_a->get_arg(0), bv_val_a->get_arg(1), bv_val_a->get_arg(2) };
                     cc_args = m_bv_util.mk_concat(3, args);
                     c = m.mk_eq(wrapped, cc_args);
-		    // NB code review: #5454 exposes a bug in fpa_solver that
-		    // could be latent here as well. It needs also the equality
-		    // n == bv_val_e to be asserted such that whenever something is assigned th
-		    // bit-vector value cc_args it is equated with n
-		    // I don't see another way this constraint would be enforced.
                     assert_cnstr(c);
                     assert_cnstr(mk_side_conditions());
+                    assert_cnstr(m.mk_eq(n, bv_val_e));
                 }
                 else {
                     expr_ref wu(m);