array[1..n] of var 1..n: x;  % decision variables
var int: cost;               % objective function

% --- some constraints defining the problem ---

% The user-defined LNS strategy
predicate my_lns() = basic_lns(uniform_neighbourhood(x, 0.2));@\Vlabel{line:inc:blns:strat}@

% Solve using my_lns, restart every 500 nodes, overall timeout 120 seconds
solve ::on_restart("my_lns") ::restart_constant(500) ::timeout(120)
      minimize cost;