Gurobi 5.0.1 (linux64) logging started Wed Apr 24 00:59:51 2013

Optimize a model with 17302 rows, 16892 columns and 67322 nonzeros
Presolve removed 41 rows and 0 columns
Presolve time: 0.07s
Presolved: 17261 rows, 16892 columns, 67281 nonzeros
Variable types: 16851 continuous, 41 integer (41 binary)

Root relaxation: objective 4.418276e+04, 2715 iterations, 0.70 seconds

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

     0     0 44182.7645    0   36          - 44182.7645     -      -    0s
H    0     0                    52528.000000 44182.7645  15.9%     -    1s
     0     0 51099.4402    0    2 52528.0000 51099.4402  2.72%     -    1s
H    0     0                    52299.000000 51099.4402  2.29%     -    1s
H    0     0                    51151.000000 51099.4402  0.10%     -    1s
     0     0 51099.4402    0    2 51151.0000 51099.4402  0.10%     -    1s
     0     0 51147.9066    0    4 51151.0000 51147.9066  0.01%     -    1s

Cutting planes:
  Gomory: 1
  Implied bound: 34
  MIR: 1

Explored 0 nodes (4143 simplex iterations) in 1.94 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.115100000000e+04, best bound 5.114790657277e+04, gap 0.0060%