Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:38:13 2013

Optimize a model with 37942 rows, 37332 columns and 148962 nonzeros
Presolve removed 61 rows and 0 columns
Presolve time: 0.16s
Presolved: 37881 rows, 37332 columns, 148901 nonzeros
Variable types: 37271 continuous, 61 integer (61 binary)

Root relaxation: objective 5.594620e+04, 5090 iterations, 2.39 seconds

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

     0     0 55946.2041    0   51          - 55946.2041     -      -    2s
H    0     0                    82242.000000 55946.2041  32.0%     -    4s
     0     0 69299.5117    0   10 82242.0000 69299.5117  15.7%     -    6s
H    0     0                    75161.713792 69299.5117  7.80%     -    6s
H    0     0                    71522.000000 69299.5117  3.11%     -    6s
     0     0 69723.0208    0    3 71522.0000 69723.0208  2.52%     -    7s
H    0     0                    70654.750105 69723.0208  1.32%     -    7s
H    0     0                    70060.000000 69723.0208  0.48%     -    7s
H    0     0                    69797.000000 69723.0208  0.11%     -    7s
     0     0 69787.8080    0    2 69797.0000 69787.8080  0.01%     -    7s
     0     0 69789.5000    0    1 69797.0000 69789.5000  0.01%     -    7s
     0     0 69789.5000    0   37 69797.0000 69789.5000  0.01%     -   10s
     0     0 69789.5000    0    3 69797.0000 69789.5000  0.01%     -   13s
     0     0 69789.5000    0    3 69797.0000 69789.5000  0.01%     -   13s
     0     0 69789.5000    0    1 69797.0000 69789.5000  0.01%     -   13s

Cutting planes:
  Gomory: 1
  Implied bound: 39

Explored 0 nodes (14318 simplex iterations) in 13.70 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 6.979700000000e+04, best bound 6.979700000000e+04, gap 0.0%