General implementation of termination condition for minimal perturbation
Solver stops when a timeout is reached (expressed either by the number of
iterations or by a time) or when an acceptable complete (all variables are
assigned) solution is found. The acceptance of a solution is expressed either
by the minimal number of variables assigned to not-initial values or by the
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it under the terms of the GNU Lesser General Public License as
published by the Free Software Foundation; either version 3 of the
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