Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:15:52 2013

Optimize a model with 28673 rows, 28143 columns and 112413 nonzeros
Presolve removed 1223 rows and 0 columns
Presolve time: 0.16s
Presolved: 27450 rows, 28143 columns, 109967 nonzeros
Variable types: 28090 continuous, 53 integer (53 binary)

Root relaxation: objective 5.606783e+04, 5551 iterations, 0.65 seconds

    Nodes    |    Current Node    |     Objective Bounds      |     Work
 Expl Unexpl |  Obj  Depth IntInf | Incumbent    BestBd   Gap | It/Node Time

     0     0 56067.8308    0    3          - 56067.8308     -      -    0s
H    0     0                    56728.000000 56067.8308  1.16%     -    0s
H    0     0                    56072.000000 56067.8308  0.01%     -    1s

Explored 0 nodes (5551 simplex iterations) in 1.08 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.607200000000e+04, best bound 5.606783076598e+04, gap 0.0074%