Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:25:31 2013

Optimize a model with 33174 rows, 32604 columns and 130074 nonzeros
Presolve removed 57 rows and 0 columns
Presolve time: 0.14s
Presolved: 33117 rows, 32604 columns, 130017 nonzeros
Variable types: 32547 continuous, 57 integer (57 binary)

Root relaxation: objective 5.548881e+04, 5780 iterations, 2.86 seconds

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

     0     0 55488.8124    0   47          - 55488.8124     -      -    3s
H    0     0                    81079.000000 55488.8124  31.6%     -    4s
     0     0 69632.7080    0    6 81079.0000 69632.7080  14.1%     -    7s
H    0     0                    78243.986250 69632.7080  11.0%     -    7s
H    0     0                    74984.000000 69632.7080  7.14%     -    7s
     0     0 70308.2406    0    2 74984.0000 70308.2406  6.24%     -    7s
H    0     0                    71533.987952 70308.2406  1.71%     -    7s
H    0     0                    70511.000000 70308.2406  0.29%     -    7s
H    0     0                    70399.000000 70308.2406  0.13%     -    7s
     0     2 70326.0541    0    2 70399.0000 70326.0541  0.10%     -    8s
*    3     2               3    70391.000000 70387.7353  0.00%  28.0    8s

Cutting planes:
  Gomory: 2
  Implied bound: 48

Explored 4 nodes (9319 simplex iterations) in 8.43 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 7.039100000000e+04, best bound 7.038773529412e+04, gap 0.0046%