XBT_DEBUG("a %f ind %d integral %f ind + 1 %f ind %f time +1 %f time %f",
a, ind, integral, integral_[ind + 1], integral_[ind], timePoints_[ind + 1], timePoints_[ind]);
double_update(&a_aux, timePoints_[ind], sg_maxmin_precision*sg_surf_precision);
XBT_DEBUG("a %f ind %d integral %f ind + 1 %f ind %f time +1 %f time %f",
a, ind, integral, integral_[ind + 1], integral_[ind], timePoints_[ind + 1], timePoints_[ind]);
double_update(&a_aux, timePoints_[ind], sg_maxmin_precision*sg_surf_precision);