Coronal energy (upper panel) and helicity (lower panel) budgets and non-potentiality ratios (see the text for details) for the default simulation computed both in the entire domain (black curves), and in the western region x > 3 Mm enclosing the FR system of interest (red curves). Solid curves show the total budgets for three of our simulations (see text for details). Dashed line shows the non-potential component of the total budget (either or H_j), and the dotted lines show the non-potentiality ratios ( and H_j/H_R). H_j/H_R is not plotted before 21 April 2013, 15:00 UT, as it exhibits erratic variations during that time arising from the low H_R values. Horizontal solid lines show the zeroes of the y-axes and the vertical dashed line shows the time of the eruption on 22 April 2013 at 08:40 UT.