Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:16:59 2013

Optimize a model with 28726 rows, 28196 columns and 112466 nonzeros
Presolve removed 53 rows and 0 columns
Presolve time: 0.12s
Presolved: 28673 rows, 28196 columns, 112413 nonzeros
Variable types: 28143 continuous, 53 integer (53 binary)

Root relaxation: objective 4.433717e+04, 3779 iterations, 1.32 seconds

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

     0     0 44337.1691    0   42          - 44337.1691     -      -    1s
H    0     0                    66641.000000 44337.1691  33.5%     -    2s
     0     0 54286.7924    0   10 66641.0000 54286.7924  18.5%     -    4s
H    0     0                    63487.202943 54286.7924  14.5%     -    4s
H    0     0                    59862.000000 54286.7924  9.31%     -    4s
     0     0 54557.1967    0    5 59862.0000 54557.1967  8.86%     -    4s
H    0     0                    58141.024711 54557.1967  6.16%     -    4s
H    0     0                    57110.000000 54557.1967  4.47%     -    4s
H    0     0                    55916.000000 54557.1967  2.43%     -    4s
H    0     0                    54818.622642 54557.1967  0.48%     -    5s
H    0     0                    54724.000000 54557.1967  0.30%     -    5s
     0     1 54608.1559    0    5 54724.0000 54608.1559  0.21%     -    5s

Cutting planes:
  Implied bound: 45

Explored 8 nodes (7013 simplex iterations) in 6.01 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.472400000000e+04, best bound 5.472400000000e+04, gap 0.0%