Gurobi 5.0.1 (linux64) logging started Fri Jan 18 00:55:28 2013

Optimize a model with 1080 rows, 4840 columns and 11220 nonzeros
Presolve removed 60 rows and 40 columns
Presolve time: 0.03s
Presolved: 1020 rows, 4800 columns, 10360 nonzeros
Variable types: 4420 continuous, 380 integer (380 binary)

Root relaxation: objective 4.642213e+04, 774 iterations, 0.01 seconds

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

     0     0 46422.1265    0    3          - 46422.1265     -      -    0s
     0     0 46456.1748    0    3          - 46456.1748     -      -    0s
     0     0 46464.8245    0    3          - 46464.8245     -      -    0s
     0     0 46464.8245    0    3          - 46464.8245     -      -    0s
     0     0 46464.8245    0    3          - 46464.8245     -      -    0s
H    0     0                    47377.636012 46464.8245  1.93%     -    0s
     0     2 46473.8292    0    3 47377.6360 46473.8292  1.91%     -    0s
H   15    13                    46855.119170 46511.8694  0.73%  20.3    0s
H   16    13                    46852.019310 46511.8694  0.73%  19.6    0s
*   17    13              13    46844.832599 46511.8694  0.71%  20.2    0s
H   47    27                    46824.567577 46541.2834  0.60%  15.4    0s
*   49    25              11    46797.785654 46541.2834  0.55%  16.0    0s
H   78    23                    46782.565919 46565.4736  0.46%  17.9    0s
*  158    17              10    46778.790183 46646.2268  0.28%  18.2    0s
H  164    13                    46757.522593 46646.9483  0.24%  17.8    0s
H  165    14                    46743.553085 46646.9483  0.21%  17.9    0s

Cutting planes:
  Gomory: 2
  Flow cover: 11

Explored 214 nodes (4356 simplex iterations) in 0.56 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.674355308496e+04, best bound 4.674355308496e+04, gap 0.0%