Gurobi 5.0.1 (linux64) logging started Fri Jan 18 01:42:01 2013

Optimize a model with 520 rows, 5180 columns and 16440 nonzeros
Presolve removed 20 rows and 20 columns
Presolve time: 0.02s
Presolved: 500 rows, 5160 columns, 15420 nonzeros
Variable types: 5040 continuous, 120 integer (120 binary)

Root relaxation: objective 3.894400e+04, 540 iterations, 0.01 seconds

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

     0     0 38944.0027    0    6          - 38944.0027     -      -    0s
     0     0 38956.6277    0    6          - 38956.6277     -      -    0s
     0     0 38957.2987    0    7          - 38957.2987     -      -    0s
     0     0 38957.3380    0    7          - 38957.3380     -      -    0s
     0     0 38957.3380    0    7          - 38957.3380     -      -    0s
H    0     0                    43032.386529 38957.3380  9.47%     -    0s
     0     2 38978.1254    0    7 43032.3865 38978.1254  9.42%     -    0s
*   16     6              16    39263.522915 39243.7910  0.05%  11.8    0s
*   29     6              16    39247.710632 39244.4304  0.01%   7.6    0s

Cutting planes:
  Flow cover: 5

Explored 30 nodes (950 simplex iterations) in 0.26 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 3.924771063159e+04, best bound 3.924443040197e+04, gap 0.0084%