Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:07:05 2013

Optimize a model with 23568 rows, 23088 columns and 92208 nonzeros
Presolve removed 1288 rows and 0 columns
Presolve time: 0.13s
Presolved: 22280 rows, 23088 columns, 89632 nonzeros
Variable types: 23040 continuous, 48 integer (48 binary)

Root relaxation: objective 5.341251e+04, 4362 iterations, 0.43 seconds

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

     0     0 53412.5054    0    4          - 53412.5054     -      -    0s
H    0     0                    53580.000000 53412.5054  0.31%     -    0s
     0     0 53412.6075    0    5 53580.0000 53412.6075  0.31%     -    0s
     0     0 53463.3966    0    4 53580.0000 53463.3966  0.22%     -    1s
     0     0 53463.4063    0    4 53580.0000 53463.4063  0.22%     -    1s
H    0     0                    53519.000000 53463.4063  0.10%     -    1s
     0     0 53463.7259    0    2 53519.0000 53463.7259  0.10%     -    1s
     0     0 53466.2227    0    3 53519.0000 53466.2227  0.10%     -    1s
     0     0 53466.2227    0    3 53519.0000 53466.2227  0.10%     -    1s
     0     0 53466.2541    0    3 53519.0000 53466.2541  0.10%     -    1s
     0     0 53466.5611    0    3 53519.0000 53466.5611  0.10%     -    2s
     0     2 53467.1794    0    3 53519.0000 53467.1794  0.10%     -    2s

Cutting planes:
  Gomory: 1
  Flow cover: 5

Explored 2 nodes (6248 simplex iterations) in 2.28 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.351900000000e+04, best bound 5.351561538462e+04, gap 0.0063%