Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:03:34 2013

Optimize a model with 495 rows, 20295 columns and 40545 nonzeros
Presolve time: 0.03s
Presolved: 495 rows, 20295 columns, 40545 nonzeros
Variable types: 20250 continuous, 45 integer (45 binary)

Root relaxation: objective 3.822290e+04, 562 iterations, 0.01 seconds

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

     0     0 38222.8964    0   10          - 38222.8964     -      -    0s
H    0     0                    40494.000000 38222.8964  5.61%     -    0s
     0     0 38814.4920    0    7 40494.0000 38814.4920  4.15%     -    0s
     0     0 38849.8413    0    7 40494.0000 38849.8413  4.06%     -    0s
H    0     0                    40154.000000 38849.8413  3.25%     -    0s
     0     0 38869.0634    0    7 40154.0000 38869.0634  3.20%     -    0s
H    0     0                    39917.000000 38869.0634  2.63%     -    0s
     0     0 38879.5692    0    3 39917.0000 38879.5692  2.60%     -    0s
H    0     0                    39777.000000 38879.5692  2.26%     -    0s
     0     0 38882.7049    0    5 39777.0000 38882.7049  2.25%     -    0s
     0     0 38885.6628    0    6 39777.0000 38885.6628  2.24%     -    0s
     0     0 38886.4036    0    7 39777.0000 38886.4036  2.24%     -    0s
H    0     0                    39758.000000 38886.4036  2.19%     -    0s
     0     0 38887.0328    0    4 39758.0000 38887.0328  2.19%     -    0s
H    0     0                    39728.000000 38887.0328  2.12%     -    0s
     0     0 38887.4800    0    6 39728.0000 38887.4800  2.12%     -    0s
H    0     0                    38890.000000 38887.4800  0.01%     -    0s

Cutting planes:
  Implied bound: 97
  Flow cover: 7

Explored 0 nodes (980 simplex iterations) in 0.48 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 3.889000000000e+04, best bound 3.888748003124e+04, gap 0.0065%