[1375] % z3 small.smt2
sat
sat
(error "line 8 column 10: an invalid model was generated")
[1376] % 
[1376] % cat small.smt2
(set-option :model_validate true)
(set-option :parallel.enable true)
(declare-fun a () Int)
(declare-fun b () Int)
(declare-fun c (Int) Int)
(assert (distinct b (c a)))
(check-sat)
(check-sat)
[1377] %