Gurobi 5.0.1 (linux64) logging started Fri Jan 18 01:40:40 2013

Optimize a model with 640 rows, 2520 columns and 6010 nonzeros
Presolve removed 20 rows and 30 columns
Presolve time: 0.03s
Presolved: 620 rows, 2490 columns, 4980 nonzeros
Variable types: 2000 continuous, 490 integer (490 binary)

Root relaxation: objective 2.337984e+04, 131 iterations, 0.00 seconds

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

     0     0 23379.8401    0    1          - 23379.8401     -      -    0s
     0     0 23385.1243    0    2          - 23385.1243     -      -    0s
     0     0 23385.7332    0    2          - 23385.7332     -      -    0s
     0     0 23385.7332    0    2          - 23385.7332     -      -    0s
H    0     0                    24650.155586 23385.7332  5.13%     -    0s
     0     2 23394.4596    0    2 24650.1556 23394.4596  5.09%     -    0s
*   15    11              15    23527.300521 23520.0060  0.03%   3.4    0s

Cutting planes:
  Gomory: 1
  Flow cover: 2

Explored 35 nodes (448 simplex iterations) in 0.16 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 2.352730052140e+04, best bound 2.352612271362e+04, gap 0.0050%