Gurobi 5.0.1 (linux64) logging started Fri Jan 18 00:55:53 2013

Optimize a model with 480 rows, 4560 columns and 11180 nonzeros
Presolve removed 20 rows and 20 columns
Presolve time: 0.02s
Presolved: 460 rows, 4540 columns, 10760 nonzeros
Variable types: 4440 continuous, 100 integer (100 binary)

Root relaxation: objective 4.370285e+04, 657 iterations, 0.03 seconds

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

     0     0 43702.8549    0    6          - 43702.8549     -      -    0s
     0     0 43716.5351    0    7          - 43716.5351     -      -    0s
     0     0 43716.5351    0    9          - 43716.5351     -      -    0s
     0     0 43716.5351    0    7          - 43716.5351     -      -    0s
     0     0 43716.5351    0    7          - 43716.5351     -      -    0s
     0     0 43716.5351    0    7          - 43716.5351     -      -    0s
H    0     0                    47373.934755 43716.5351  7.72%     -    0s
     0     2 43716.5351    0    7 47373.9348 43716.5351  7.72%     -    0s
*   10    10               8    44060.493872 43850.8529  0.48%  13.3    0s
*   22    12               9    44040.004780 43878.1749  0.37%  12.9    0s
H   27     4                    43900.745969 43879.3727  0.05%  10.6    0s

Cutting planes:
  Gomory: 1
  Flow cover: 3

Explored 39 nodes (1190 simplex iterations) in 0.41 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.390074596881e+04, best bound 4.389694531587e+04, gap 0.0087%