Gurobi 5.0.1 (linux64) logging started Fri Jan 18 01:40:49 2013

Optimize a model with 260 rows, 1590 columns and 6220 nonzeros
Presolve removed 10 rows and 10 columns
Presolve time: 0.01s
Presolved: 250 rows, 1580 columns, 5710 nonzeros
Variable types: 1520 continuous, 60 integer (60 binary)

Root relaxation: objective 2.162324e+04, 152 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 21625.7022    0    8          - 21625.7022     -      -    0s
     0     0 21651.2622    0   10          - 21651.2622     -      -    0s
     0     0 21651.2622    0   10          - 21651.2622     -      -    0s
H    0     0                    23094.230643 21651.2622  6.25%     -    0s
     0     2 21710.8409    0   10 23094.2306 21710.8409  5.99%     -    0s
*   23    15              20    21811.879326 21748.1497  0.29%   5.5    0s
*   33    13              11    21763.798346 21748.5078  0.07%   4.5    0s
*   42    14              12    21759.374832 21748.5178  0.05%   3.9    0s
*   63    10              12    21759.185397 21752.3195  0.03%   3.5    0s

Cutting planes:
  Gomory: 1
  Flow cover: 2

Explored 81 nodes (574 simplex iterations) in 0.14 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 2.175918539669e+04, best bound 2.175756862648e+04, gap 0.0074%