Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:16:40 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 4.425968e+04, 3447 iterations, 1.28 seconds

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

     0     0 44259.6790    0   43          - 44259.6790     -      -    1s
H    0     0                    59881.000000 44259.6790  26.1%     -    2s
     0     0 55086.4552    0    5 59881.0000 55086.4552  8.01%     -    3s
H    0     0                    59218.516865 55086.4552  6.98%     -    3s
H    0     0                    58399.000000 55086.4552  5.67%     -    3s
H    0     0                    57299.000000 55086.4552  3.86%     -    3s
     0     0 55137.4970    0    3 57299.0000 55137.4970  3.77%     -    3s
H    0     0                    56870.545032 55137.4970  3.05%     -    3s
H    0     0                    56599.000000 55137.4970  2.58%     -    3s
H    0     0                    55247.000000 55137.4970  0.20%     -    3s
     0     0 55215.0667    0    1 55247.0000 55215.0667  0.06%     -    4s
     0     2 55215.6444    0    1 55247.0000 55215.6444  0.06%     -    4s

Cutting planes:
  Implied bound: 42

Explored 3 nodes (5675 simplex iterations) in 4.53 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.524700000000e+04, best bound 5.524700000000e+04, gap 0.0%