Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:02:05 2013

Optimize a model with 19844 rows, 19404 columns and 77484 nonzeros
Presolve removed 973 rows and 0 columns
Presolve time: 0.11s
Presolved: 18871 rows, 19404 columns, 75538 nonzeros
Variable types: 19360 continuous, 44 integer (44 binary)

Root relaxation: objective 3.987876e+04, 2280 iterations, 0.19 seconds

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

     0     0 39878.7561    0    4          - 39878.7561     -      -    0s
H    0     0                    40158.000000 39878.7561  0.70%     -    0s
H    0     0                    39930.000000 39878.7561  0.13%     -    0s
     0     0 39879.7087    0    5 39930.0000 39879.7087  0.13%     -    0s
     0     0 39879.7087    0    4 39930.0000 39879.7087  0.13%     -    0s
     0     0 39879.9960    0    5 39930.0000 39879.9960  0.13%     -    0s
     0     0 39881.1797    0    5 39930.0000 39881.1797  0.12%     -    0s
     0     0 39918.2593    0    1 39930.0000 39918.2593  0.03%     -    0s
     0     2 39919.0000    0    1 39930.0000 39919.0000  0.03%     -    1s
*    3     2               3    39927.000000 39919.0000  0.02%  10.3    1s

Cutting planes:
  Gomory: 2
  Flow cover: 3

Explored 5 nodes (3408 simplex iterations) in 1.09 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 3.992700000000e+04, best bound 3.992600000000e+04, gap 0.0025%