Gurobi 5.0.1 (linux64) logging started Fri Jan 18 01:41:14 2013 Optimize a model with 1280 rows, 7040 columns and 16020 nonzeros Presolve removed 40 rows and 60 columns Presolve time: 0.12s Presolved: 1240 rows, 6980 columns, 13960 nonzeros Variable types: 6000 continuous, 980 integer (980 binary) Root relaxation: objective 3.839329e+04, 481 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 38393.2919 0 2 - 38393.2919 - - 0s 0 0 38482.8991 0 4 - 38482.8991 - - 0s 0 0 38484.1522 0 4 - 38484.1522 - - 0s 0 0 38484.9363 0 4 - 38484.9363 - - 0s 0 0 38485.3781 0 4 - 38485.3781 - - 0s 0 0 38487.6671 0 5 - 38487.6671 - - 0s 0 0 38488.8922 0 4 - 38488.8922 - - 0s 0 0 38489.7728 0 4 - 38489.7728 - - 0s 0 0 38490.5532 0 5 - 38490.5532 - - 0s 0 0 38490.6329 0 4 - 38490.6329 - - 0s 0 0 38490.6329 0 4 - 38490.6329 - - 0s 0 0 38490.6329 0 4 - 38490.6329 - - 0s H 0 0 41545.921890 38490.6329 7.35% - 0s 0 2 38494.6646 0 4 41545.9219 38494.6646 7.34% - 0s H 27 21 38679.224975 38554.2522 0.32% 7.0 0s H 54 37 38670.405608 38554.7113 0.30% 5.9 0s H 81 43 38660.509970 38557.0446 0.27% 5.8 1s H 108 57 38638.274112 38561.3673 0.20% 6.2 1s * 2092 40 38 38634.712282 38625.8315 0.02% 6.1 4s Cutting planes: Gomory: 1 Flow cover: 6 Explored 2131 nodes (13572 simplex iterations) in 4.32 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.863471228242e+04, best bound 3.863096889219e+04, gap 0.0097%