Gurobi 5.0.1 (linux64) logging started Fri Jan 18 02:46:21 2013

Optimize a model with 56 rows, 260 columns and 1930 nonzeros
Presolve removed 22 rows and 24 columns
Presolve time: 0.00s
Presolved: 34 rows, 236 columns, 1684 nonzeros
Variable types: 222 continuous, 14 integer (14 binary)

Root relaxation: objective 4.810927e+03, 16 iterations, 0.00 seconds

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

     0     0 4810.92679    0    6          - 4810.92679     -      -    0s
     0     0 4814.58172    0    8          - 4814.58172     -      -    0s
     0     0 4830.15318    0    6          - 4830.15318     -      -    0s
     0     0 4830.63250    0    6          - 4830.63250     -      -    0s
H    0     0                    4831.6051331 4830.63250  0.02%     -    0s
     0     0 4830.77794    0    3 4831.60513 4830.77794  0.02%     -    0s
     0     0 4830.82605    0    6 4831.60513 4830.82605  0.02%     -    0s
     0     0 4830.82605    0    6 4831.60513 4830.82605  0.02%     -    0s
     0     2 4830.84937    0    6 4831.60513 4830.84937  0.02%     -    0s
*    5     3               4    4831.4746261 4830.84937  0.01%   3.6    0s
*   14     3               5    4831.1180431 4830.87263  0.01%   2.9    0s

Cutting planes:
  Gomory: 2
  Implied bound: 2
  Flow cover: 2

Explored 15 nodes (129 simplex iterations) in 0.02 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.831118043089e+03, best bound 4.830872628512e+03, gap 0.0051%