Endgame challenge

White just played 44. Be7. It is now Black to move. Is this a win, draw, or loss for Black? How should Black proceed?

8/4Bk2/1bp1p1pK/p1p1P3/P1P2P2/8/7P/8 b - - 0 44

Hou Yifan - Humpy Konery (WWC Seminfinal - game 1)