Standard Out:
% File: /tmp/tmpRe-dFi/der.pl
% cTI version 1.0, poly_ppl, 60000ms, 5 ite
% Unknown skipped directive: der(i,o)
% |Sccs|=1
% n-model ...
% constr-lm ...
% concr-lm ...
% b-model ...
% term-cond ...
%  ------------------------------
%  Timings (ms)
%  total: 40
%  isopl_clpn: 0
%  model_clpn: 20
%  constr__lm: 10
%  concret_lm: 0
%  pgnat_bool: 0
%  model_bool: 10
%  term_conds: 0
%  -------------------------------
%  terminating predicates: 0.00%
%  terminating modes: 0
%  -------------------------------
% Possibly non-terminating predicates: [der/2]
[predicate_term_condition(der(A,B),0)].

Standard Err: