Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:16:15 2013

Optimize a model with 583 rows, 28143 columns and 56233 nonzeros
Presolve time: 0.04s
Presolved: 583 rows, 28143 columns, 56233 nonzeros
Variable types: 28090 continuous, 53 integer (53 binary)

Root relaxation: objective 5.594263e+04, 1227 iterations, 0.03 seconds

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

     0     0 55942.6334    0    5          - 55942.6334     -      -    0s
H    0     0                    56728.000000 55942.6334  1.38%     -    0s
H    0     0                    56072.000000 55942.6334  0.23%     -    0s
     0     0 56060.7685    0    3 56072.0000 56060.7685  0.02%     -    0s
     0     0 56060.7685    0    5 56072.0000 56060.7685  0.02%     -    0s
     0     0 56061.0498    0    3 56072.0000 56061.0498  0.02%     -    0s
     0     0 56062.9945    0    3 56072.0000 56062.9945  0.02%     -    0s
     0     0 56065.6389    0    3 56072.0000 56065.6389  0.01%     -    0s
     0     0 56067.1052    0    2 56072.0000 56067.1052  0.01%     -    0s

Cutting planes:
  Implied bound: 38
  Flow cover: 5

Explored 0 nodes (2361 simplex iterations) in 0.42 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.607200000000e+04, best bound 5.606710521165e+04, gap 0.0087%