Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:05:56 2013 Optimize a model with 22607 rows, 22137 columns and 88407 nonzeros Presolve removed 1192 rows and 0 columns Presolve time: 0.12s Presolved: 21415 rows, 22137 columns, 86023 nonzeros Variable types: 22090 continuous, 47 integer (47 binary) Root relaxation: objective 5.071083e+04, 4459 iterations, 0.47 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 50710.8292 0 2 - 50710.8292 - - 0s H 0 0 51115.000000 50710.8292 0.79% - 0s 0 0 50713.8352 0 3 51115.0000 50713.8352 0.78% - 0s 0 0 50713.8491 0 3 51115.0000 50713.8491 0.78% - 0s 0 0 50713.8531 0 4 51115.0000 50713.8531 0.78% - 1s H 0 0 51017.000000 50713.8531 0.59% - 1s 0 2 50718.7971 0 4 51017.0000 50718.7971 0.58% - 1s * 7 2 6 50983.000000 50944.5523 0.08% 130 2s Cutting planes: Gomory: 1 Flow cover: 6 Explored 13 nodes (5628 simplex iterations) in 2.26 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.098300000000e+04, best bound 5.098300000000e+04, gap 0.0%