Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:02:47 2013

Optimize a model with 19888 rows, 19448 columns and 77528 nonzeros
Presolve removed 44 rows and 0 columns
Presolve time: 0.08s
Presolved: 19844 rows, 19448 columns, 77484 nonzeros
Variable types: 19404 continuous, 44 integer (44 binary)

Root relaxation: objective 3.771211e+04, 2380 iterations, 0.40 seconds

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

     0     0 37712.1093    0   34          - 37712.1093     -      -    0s
H    0     0                    45420.000000 37712.1093  17.0%     -    0s
     0     0 43530.3054    0    6 45420.0000 43530.3054  4.16%     -    1s
     0     0 43774.8735    0    4 45420.0000 43774.8735  3.62%     -    1s
H    0     0                    44708.432235 43774.8735  2.09%     -    1s
H    0     0                    44327.000000 43774.8735  1.25%     -    1s
H    0     0                    43906.000000 43774.8735  0.30%     -    1s
     0     0 43812.8420    0    2 43906.0000 43812.8420  0.21%     -    1s
     0     0 43813.2857    0    1 43906.0000 43813.2857  0.21%     -    1s
H    0     0                    43838.000000 43813.2857  0.06%     -    2s
     0     0 43813.2857    0   24 43838.0000 43813.2857  0.06%     -    2s
     0     0 43813.2857    0    4 43838.0000 43813.2857  0.06%     -    3s
H    0     0                    43828.000000 43813.2857  0.03%     -    3s
     0     0 43826.0554    0    2 43828.0000 43826.0554  0.00%     -    3s

Cutting planes:
  Gomory: 3
  Implied bound: 25

Explored 0 nodes (6628 simplex iterations) in 3.29 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.382800000000e+04, best bound 4.382605538462e+04, gap 0.0044%