Gurobi 5.0.1 (linux64) logging started Fri Jan 18 00:15:47 2013

Optimize a model with 260 rows, 1230 columns and 2750 nonzeros
Presolve removed 20 rows and 20 columns
Presolve time: 0.01s
Presolved: 240 rows, 1210 columns, 2680 nonzeros
Variable types: 1120 continuous, 90 integer (90 binary)

Root relaxation: objective 2.162324e+04, 146 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    2          - 21623.2446     -      -    0s
     0     0 21636.6176    0    2          - 21636.6176     -      -    0s
     0     0 21636.6176    0    2          - 21636.6176     -      -    0s
H    0     0                    21770.062588 21636.6176  0.61%     -    0s
     0     2 21640.5570    0    2 21770.0626 21640.5570  0.59%     -    0s
*    7     5               6    21759.973325 21711.8536  0.22%   6.7    0s
*   12     6               5    21758.343794 21739.2792  0.09%   5.1    0s

Cutting planes:
  Gomory: 1
  Flow cover: 1

Explored 21 nodes (272 simplex iterations) in 0.04 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 2.175834379400e+04, best bound 2.175763220139e+04, gap 0.0033%