Gurobi 5.0.1 (linux64) logging started Wed Apr 24 00:58:16 2013

Optimize a model with 15678 rows, 15288 columns and 60918 nonzeros
Presolve removed 39 rows and 0 columns
Presolve time: 0.07s
Presolved: 15639 rows, 15288 columns, 60879 nonzeros
Variable types: 15249 continuous, 39 integer (39 binary)

Root relaxation: objective 3.437793e+04, 2085 iterations, 0.41 seconds

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

     0     0 34377.9350    0   31          - 34377.9350     -      -    0s
H    0     0                    41402.000000 34377.9350  17.0%     -    0s
     0     0 38440.0568    0    4 41402.0000 38440.0568  7.15%     -    1s
H    0     0                    40303.515239 38440.0568  4.62%     -    1s
H    0     0                    38766.000000 38440.0568  0.84%     -    1s
H    0     0                    38482.000000 38440.0568  0.11%     -    1s
     0     0 38443.3616    0    3 38482.0000 38443.3616  0.10%     -    1s
H    0     0                    38467.000000 38443.3616  0.06%     -    1s
H    0     0                    38463.000000 38443.3616  0.05%     -    1s
     0     2 38453.3636    0    2 38463.0000 38453.3636  0.03%     -    1s

Cutting planes:
  Gomory: 1
  Implied bound: 30

Explored 2 nodes (3241 simplex iterations) in 1.75 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 3.846300000000e+04, best bound 3.846269230769e+04, gap 0.0008%