Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:44:23 2013

Optimize a model with 693 rows, 39753 columns and 79443 nonzeros
Presolve time: 0.06s
Presolved: 693 rows, 39753 columns, 79443 nonzeros
Variable types: 39690 continuous, 63 integer (63 binary)

Root relaxation: objective 6.161260e+04, 1318 iterations, 0.04 seconds

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

     0     0 61612.6000    0    2          - 61612.6000     -      -    0s
H    0     0                    61963.000000 61612.6000  0.57%     -    0s
     0     0 61630.6000    0    1 61963.0000 61630.6000  0.54%     -    0s
     0     0 61630.6000    0    2 61963.0000 61630.6000  0.54%     -    0s
     0     0 61630.6000    0    1 61963.0000 61630.6000  0.54%     -    0s
     0     0 61632.4000    0    1 61963.0000 61632.4000  0.53%     -    0s
     0     0 61634.0000    0    1 61963.0000 61634.0000  0.53%     -    0s
     0     0 61638.8000    0    1 61963.0000 61638.8000  0.52%     -    0s
     0     0 61640.0000    0    1 61963.0000 61640.0000  0.52%     -    0s
     0     0 61640.0000    0    1 61963.0000 61640.0000  0.52%     -    0s
     0     0 61640.0000    0    1 61963.0000 61640.0000  0.52%     -    0s
     0     2 61644.0000    0    1 61963.0000 61644.0000  0.51%     -    0s
*    8     2               7    61778.000000 61764.2941  0.02%  26.5    0s

Cutting planes:
  Implied bound: 21
  Flow cover: 3

Explored 11 nodes (2737 simplex iterations) in 0.84 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 6.177800000000e+04, best bound 6.177800000000e+04, gap 0.0%