%This is my graph:
output =
   edges: {[0 1]  [0 2]  [1 3]  [1 4]  [1 5]  [2 6]  [3 6]  [2 7]  [3 7]  [4 7]}
vertices: [0 1 2 3 4 5 6 7]

%I am traversing with this code
maximal_sets = {};
stack=java.util.Stack();
stack.push(0);
CP = [];
Q = [];
labels = ones(1,size(output.vertices,2));
while ~stack.empty()
    flag = 0;
    x = stack.peek();
    for e = 1:size(output.edges,2)
        if output.edges{e}(1) == x && labels(output.edges{e}(2)+1) == 1
            flag = 1;
            w = output.edges{e}(2);
            stack.push(w);
            CP = union(CP,w);
            break
        end
    end
    if flag == 0
        Q = [];
        % PRECEDES are leaves of the graph
        if any(PRECEDES{end}==x)
            for v=1:size(CP,2)
                Q = union(Q,CP(v));
            end
        end
        if size(Q,2) > 0
            maximal_sets{end+1} = Q;
        end
        for ed = 1:size(output.edges,2)
            if output.edges{ed}(1) == x
                labels(output.edges{ed}(2)+1) = 1;
            end
        end
        labels(x+1) = 0;
        stack.pop();
        CP = CP(find(CP~=x));
    end
end

for i = 1:size(maximal_sets,2)
    disp(maximal_sets{i})
end

%The paths from root to leaves (not including root which is 0) are listed:
 1     3     7

 1     4     7

 1     5

 2     6

 2     7