Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:06:58 2013 Optimize a model with 22654 rows, 22184 columns and 88454 nonzeros Presolve removed 47 rows and 0 columns Presolve time: 0.10s Presolved: 22607 rows, 22184 columns, 88407 nonzeros Variable types: 22137 continuous, 47 integer (47 binary) Root relaxation: objective 4.464309e+04, 2671 iterations, 0.65 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 44643.0854 0 39 - 44643.0854 - - 0s H 0 0 57126.000000 44643.0854 21.9% - 1s 0 0 51707.1564 0 7 57126.0000 51707.1564 9.49% - 2s H 0 0 56044.910381 51707.1564 7.74% - 2s H 0 0 53981.000000 51707.1564 4.21% - 2s 0 0 51878.7773 0 4 53981.0000 51878.7773 3.89% - 2s H 0 0 53160.365465 51878.7773 2.41% - 2s H 0 0 52255.000000 51878.7773 0.72% - 2s H 0 0 52113.000000 51878.7773 0.45% - 2s 0 2 51878.8999 0 4 52113.0000 51878.8999 0.45% - 2s * 6 4 5 51927.000000 51916.1416 0.02% 59.0 3s H 9 2 51921.808642 51917.2252 0.01% 41.1 3s Cutting planes: Gomory: 1 Implied bound: 40 Explored 9 nodes (4760 simplex iterations) in 3.10 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.192180864198e+04, best bound 5.191722522523e+04, gap 0.0088%