} else {
XBT_DEBUG("\tNon-Shared variable. Update constraint usage of %p (%g) with variable %p by %g",
cnst, cnst->usage, elem->variable, elem->variable->mu);
} else {
XBT_DEBUG("\tNon-Shared variable. Update constraint usage of %p (%g) with variable %p by %g",
cnst, cnst->usage, elem->variable, elem->variable->mu);