2021-04-11 10:33:56 (CEST) cTI start

% cTI_lt 0.25 using 23.619 MLIPS SICStus 3.8.5 (x86-linux-glibc2.1): Mon Oct 30 16:34:14 CET 2000.
% cTI: Rt=84ms, Wt=81ms. NTI: Rt=0ms, Wt=1ms at most 72 inferences for useful informations.
% NTI summary:  Complete result is optimal.
append(A,B,C)terminates_if b(A);b(C).
    % optimal. loops found: [append([_|A],x,[A|_])]. NTI took    0ms,72i,72i

% Comparison with termination analyzers
% A termination analyser of identical power would verify
% with the following 3 proofs the 1 inferred condition:

append(f, f, b).
    % ==> termination proof established
append(b, f, f).
    % ==> termination proof established
append(f, b, f).
    % ==> no proof found

Tooltip: You can skip this comparison with termination analyzers by selecting "Comp. skipped" above

Analyzed program located at URL http://www.complang.tuwien.ac.at/cti/bench/dds/dds1.1:

append([H|X],Y,[X|Z]) :- append(X,Y,Z).
append([],Y,Y).