  Published theoretical data from several models: PHSD and HSD both with and
without chiral symmetry restoration (CSR), applied to experimental data on
nuclear collisions from BEVALAC and SIS to LHC energies were analyzed using
meta-analysis and Kolmogorov criteria. This made it possible to localize
possible features of nuclear matter created in central nucleus-nucleus
collisions. Ignition of a drop of quark-gluon plasma (QGP) begins already at an
energy of about $\sqrt{s_{NN}}$ = 2 GeV. We estimate that this QGP droplet
occupies a small fraction, 15 $\%$ (average radius of about 5.3 fermi if the
fireball radius is 10 fermi) of the total volume of the fireball created at
$\sqrt{s_{NN}}$ = 2.7 GeV. A drop of exotic matter undergoes a split phase
transition: separated boundaries of sharp (1st order) crossover and CSR in
chiral limit, between QGP and Quarkyonic matter at an energy about
$\sqrt{s_{NN}}$ = 3.5 GeV. The critical endpoint of 2nd order probably cannot
be reached in nuclear collisions. The triple phase area occupies interval from
$\sqrt{s_{NN}}$ = 12 GeV to 15 GeV, the critical endpoint of 1st order at
around $\sqrt{s_{NN}}$ = 20 GeV. The boundary of smooth (2nd order) crossover
transition with CSR in chiral limit between Quarkyonic matter and QGP was
localized between $\sqrt{s_{NN}}$ = 9.3 GeV and 12 GeV, and between Hadronic
and QGP in the interval from $\sqrt{s_{NN}}$ = 15 GeV to 20 GeV, the boundary
of sharp (1st order) crossover transition with CSR in chiral limit between
Hadronic matter and QGP was localized after $\sqrt{s_{NN}}$ = 20 GeV. The phase
trajectory of the hadronic corona, enveloping the exotic droplet, always
remains in the hadronic phase.
