Op-amp circuit hysteresis calculation
Since the first op. amp. doesn't work in linear mode, a tip would be to start from its output in the two saturation voltages:




Saturation voltage of the first op. amp.
Output voltage of the second op. amp (gain = -1)
Voltage reference for comparison (voltage divider)


The difference in the references is your hysteresis. I have no idea how can you consider a \$V_2/V_1\$ ratio if the first op. amp. is always saturated.

Simulating with a rail-to-rail op. amp.: