Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:02:44 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 3.998946e+04, 3205 iterations, 0.92 seconds

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

     0     0 39989.4555    0   37          - 39989.4555     -      -    1s
H    0     0                    49113.000000 39989.4555  18.6%     -    1s
     0     0 46274.9896    0    3 49113.0000 46274.9896  5.78%     -    2s
H    0     0                    46851.503472 46274.9896  1.23%     -    2s
H    0     0                    46749.000000 46274.9896  1.01%     -    2s
H    0     0                    46338.000000 46274.9896  0.14%     -    2s
     0     0 46307.9687    0    3 46338.0000 46307.9687  0.06%     -    2s
     0     2 46309.0000    0    1 46338.0000 46309.0000  0.06%     -    2s

Cutting planes:
  Implied bound: 36

Explored 4 nodes (4534 simplex iterations) in 2.59 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.633800000000e+04, best bound 4.633800000000e+04, gap 0.0%