Gurobi 5.0.1 (linux64) logging started Thu Jan 17 23:29:22 2013 Optimize a model with 1600 rows, 100700 columns and 201900 nonzeros Presolve removed 100 rows and 100 columns Presolve time: 0.25s Presolved: 1500 rows, 100600 columns, 201500 nonzeros Variable types: 100500 continuous, 100 integer (100 binary) Root relaxation: objective 8.951303e+05, 6524 iterations, 0.54 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 895130.293 0 4 - 895130.293 - - 0s H 0 0 915138.15793 895130.293 2.19% - 1s 0 0 895191.950 0 4 915138.158 895191.950 2.18% - 1s 0 0 895214.857 0 4 915138.158 895214.857 2.18% - 2s 0 0 895238.334 0 4 915138.158 895238.334 2.17% - 2s 0 0 895245.442 0 4 915138.158 895245.442 2.17% - 2s 0 0 895247.068 0 4 915138.158 895247.068 2.17% - 2s 0 0 895252.572 0 4 915138.158 895252.572 2.17% - 3s 0 0 895254.493 0 4 915138.158 895254.493 2.17% - 3s 0 0 895257.594 0 4 915138.158 895257.594 2.17% - 3s 0 0 895258.597 0 4 915138.158 895258.597 2.17% - 4s 0 0 895259.726 0 4 915138.158 895259.726 2.17% - 4s 0 0 895259.726 0 4 915138.158 895259.726 2.17% - 4s 0 0 895259.895 0 4 915138.158 895259.895 2.17% - 5s 0 0 895259.895 0 4 915138.158 895259.895 2.17% - 6s 0 2 895262.252 0 4 915138.158 895262.252 2.17% - 7s * 11 4 11 895998.28922 895952.592 0.01% 69.5 8s Cutting planes: Flow cover: 23 Explored 12 nodes (8576 simplex iterations) in 8.30 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 8.959982892213e+05, best bound 8.959525916272e+05, gap 0.0051%