Gurobi 5.0.1 (linux64) logging started Fri Jan 18 05:27:26 2013

Optimize a model with 2570 rows, 7760 columns and 20505 nonzeros
Presolve removed 10 rows and 15 columns
Presolve time: 0.22s
Presolved: 2560 rows, 7745 columns, 15490 nonzeros
Variable types: 5250 continuous, 2495 integer (2495 binary)

Root relaxation: objective 1.204447e+04, 44 iterations, 0.00 seconds

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

     0     0 12044.4669    0    1          - 12044.4669     -      -    0s
     0     0 12044.6735    0    2          - 12044.6735     -      -    0s
     0     0 12044.6735    0    2          - 12044.6735     -      -    0s
     0     2 12044.7816    0    2          - 12044.7816     -      -    0s
*  568   342             567    12358.276336 12097.7763  2.11%   1.9    3s
*  575     0              46    12097.776310 12097.7763   0.0%   1.9    3s

Cutting planes:
  Gomory: 1
  Flow cover: 1

Explored 576 nodes (1639 simplex iterations) in 3.80 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 1.209777630968e+04, best bound 1.209777630968e+04, gap 0.0%