Gurobi 5.0.1 (linux64) logging started Fri Jan 18 07:39:08 2013

Optimize a model with 340 rows, 21600 columns and 262210 nonzeros
Presolve removed 10 rows and 490 columns
Presolve time: 0.97s
Presolved: 330 rows, 21110 columns, 242210 nonzeros
Variable types: 21010 continuous, 100 integer (100 binary)

Root relaxation: objective 1.791602e+04, 168 iterations, 0.02 seconds

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

     0     0 17916.0191    0   24          - 17916.0191     -      -    1s
     0     0 17916.1263    0   24          - 17916.1263     -      -    1s
     0     0 17916.1506    0   24          - 17916.1506     -      -    1s
     0     0 17916.1871    0   24          - 17916.1871     -      -    1s
     0     0 17916.1871    0   24          - 17916.1871     -      -    1s
H    0     0                    18015.892569 17916.1871  0.55%     -    2s
     0     0 17960.4518    0   15 18015.8926 17960.4518  0.31%     -    3s
     0     0 17960.5034    0   15 18015.8926 17960.5034  0.31%     -    3s
     0     0 17960.5039    0   17 18015.8926 17960.5039  0.31%     -    3s
     0     0 17960.5039    0   17 18015.8926 17960.5039  0.31%     -    3s
     0     2 17960.5039    0   17 18015.8926 17960.5039  0.31%     -    4s
*   26    19              24    17991.174101 17970.2645  0.12%   8.9    4s
*   30    17              25    17988.103638 17970.2645  0.10%   8.3    4s
*   34    17              26    17987.644459 17970.2645  0.10%   7.4    4s
*   60    25              17    17985.170686 17983.8465  0.01%   6.1    4s

Cutting planes:
  Flow cover: 4

Explored 61 nodes (1248 simplex iterations) in 4.68 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 1.798517068571e+04, best bound 1.798384647189e+04, gap 0.0074%