Another incorrect identification of infeasibility in MIP presolve

[jajhall]

For
issue-2122.lp.txt
Correct optimal objective found if presolve_reduction_limit=860, but incorrect identification of infeasibility if presolve_reduction_limit=861.

Also, presolve_reduction_limit=575 triggers assert

highs: /home/jajhall/HiGHS/src/mip/HighsDomain.cpp:3163: bool HighsDomain::ConflictSet::explainInfeasibility(): Assertion `ninfmin == 0' failed.

[fwesselm]

This is an issue with cut generation. I am investigating.

[jajhall]

Indeed, I see that it solves OK with presolve when random_seed=1, so it's the particular reduced MIP that exposes the bug, not presolve itself