  The Similarity Renormalization Group (SRG) is used to soften interactions for
ab initio nuclear structure calculations by decoupling low- and high-energy
Hamiltonian matrix elements. The substantial contribution of both initial and
SRG-induced three-nucleon forces requires their consistent evolution in a
three-particle basis space before applying them to larger nuclei. While in
principle the evolved Hamiltonians are unitarily equivalent, in practice the
need for basis truncation introduces deviations, which must be monitored. Here
we present benchmark no-core full configuration calculations with SRG-evolved
interactions in p-shell nuclei over a wide range of softening. These
calculations are used to assess convergence properties, extrapolation
techniques, and the dependence of energies, including four-body contributions,
on the SRG resolution scale.
