Gurobi 5.0.1 (linux64) logging started Fri Jan 18 02:47:12 2013

Optimize a model with 280 rows, 2100 columns and 11250 nonzeros
Presolve removed 10 rows and 10 columns
Presolve time: 0.01s
Presolved: 270 rows, 2090 columns, 10240 nonzeros
Variable types: 2020 continuous, 70 integer (70 binary)

Root relaxation: objective 2.162324e+04, 167 iterations, 0.00 seconds

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

     0     0 21623.2446    0    6          - 21623.2446     -      -    0s
     0     0 21624.4751    0    8          - 21624.4751     -      -    0s
     0     0 21624.4751    0    8          - 21624.4751     -      -    0s
H    0     0                    22404.165367 21624.4751  3.48%     -    0s
     0     2 21695.7758    0   10 22404.1654 21695.7758  3.16%     -    0s
*   13    10              13    21759.631599 21748.3031  0.05%   7.4    0s
*   36    11              14    21759.387167 21748.6091  0.05%   4.1    0s
*   54    13              14    21759.199381 21752.3195  0.03%   3.3    0s

Cutting planes:
  Gomory: 2
  Flow cover: 2

Explored 68 nodes (478 simplex iterations) in 0.13 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 2.175919938108e+04, best bound 2.175749085338e+04, gap 0.0079%