Gurobi 5.0.1 (linux64) logging started Sat Dec  8 03:30:36 2012

Optimize a model with 1635 rows, 1620 columns and 5926 nonzeros
Presolve removed 174 rows and 44 columns
Presolve time: 0.02s
Presolved: 1461 rows, 1576 columns, 5545 nonzeros
Variable types: 1405 continuous, 171 integer (171 binary)

Root relaxation: objective 6.146898e+04, 257 iterations, 0.00 seconds

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

     0     0 61468.9846    0    6          - 61468.9846     -      -    0s
H    0     0                    62511.000000 61468.9846  1.67%     -    0s
H    0     0                    61761.000000 61468.9846  0.47%     -    0s
     0     0 61474.9932    0    6 61761.0000 61474.9932  0.46%     -    0s
     0     0 61474.9932    0    6 61761.0000 61474.9932  0.46%     -    0s
     0     0 61474.9948    0    6 61761.0000 61474.9948  0.46%     -    0s
     0     2 61478.9399    0    6 61761.0000 61478.9399  0.46%     -    0s
*   13     9              10    61726.000000 61498.0552  0.37%   5.6    0s
*   14     1               2    61516.000000 61507.2131  0.01%   5.6    0s

Cutting planes:
  Gomory: 3
  Flow cover: 1

Explored 16 nodes (541 simplex iterations) in 0.09 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 6.151600000000e+04, best bound 6.151600000000e+04, gap 0.0%