Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:33:33 2013

Optimize a model with 36660 rows, 36060 columns and 144060 nonzeros
Presolve removed 2735 rows and 0 columns
Presolve time: 0.22s
Presolved: 33925 rows, 36060 columns, 138590 nonzeros
Variable types: 36000 continuous, 60 integer (60 binary)

Root relaxation: objective 5.396095e+04, 4739 iterations, 0.65 seconds

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

     0     0 53960.9455    0    6          - 53960.9455     -      -    0s
H    0     0                    54512.000000 53960.9455  1.01%     -    1s
H    0     0                    54437.000000 53960.9455  0.87%     -    1s
     0     0 53963.4851    0    8 54437.0000 53963.4851  0.87%     -    1s
     0     0 53963.6112    0    9 54437.0000 53963.6112  0.87%     -    1s
     0     0 53963.7012    0    8 54437.0000 53963.7012  0.87%     -    1s
     0     0 53963.9285    0    8 54437.0000 53963.9285  0.87%     -    1s
     0     0 53964.1226    0    8 54437.0000 53964.1226  0.87%     -    2s
     0     0 53964.1226    0    6 54437.0000 53964.1226  0.87%     -    3s
     0     0 53964.1226    0    8 54437.0000 53964.1226  0.87%     -    3s
     0     0 53964.1798    0    8 54437.0000 53964.1798  0.87%     -    4s
     0     0 53964.2706    0    8 54437.0000 53964.2706  0.87%     -    4s
     0     2 53974.4543    0    8 54437.0000 53974.4543  0.85%     -    5s
H    6     4                    54170.666667 54082.4413  0.16%  45.2    5s
*    7     3               7    54117.000000 54082.4413  0.06%  42.3    5s

Cutting planes:
  Gomory: 1
  Flow cover: 6

Explored 11 nodes (8555 simplex iterations) in 5.27 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.411700000000e+04, best bound 5.411700000000e+04, gap 0.0%