Femtoscopy: The way back in the energy scale from ALICE to the NICA energies

The main features of femtoscopy measurements in heavy-ion collisions at high energies are understood as a manifestation of the strong collective flow and well-interpreted within hydrodynamic models with a crossover. In this work, we discuss possibilities for observing the change from a first order phase transition expected at the NICA energies ($\sqrt s_{NN} = 4–11$ GeV) to a crossover one with the femtoscopy observables using the vHLLE+UrQMD model.