% RUNS ON flatzinc
% RUNS ON fzn_fd_canon
% RUNS ON fzn_fdlp_canon

var 0..3: x1 :: output_var;
var bool: x2 :: output_var;
constraint array_bool_element(1, [true, false], true);
constraint array_bool_element(x1, [false, true], x2);
solve satisfy;