Gurobi 5.0.1 (linux64) logging started Wed Apr 24 02:50:13 2013

Optimize a model with 55648 rows, 54908 columns and 219188 nonzeros
Presolve removed 74 rows and 0 columns
Presolve time: 0.25s
Presolved: 55574 rows, 54908 columns, 219114 nonzeros
Variable types: 54834 continuous, 74 integer (74 binary)

Root relaxation: objective 5.893353e+04, 6590 iterations, 5.00 seconds

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

     0     0 58933.5312    0   65          - 58933.5312     -      -    5s
H    0     0                    94532.000000 58933.5312  37.7%     -    8s
     0     0 71210.8312    0   14 94532.0000 71210.8312  24.7%     -   16s
H    0     0                    84955.000000 71210.8312  16.2%     -   16s
     0     0 74339.4221    0    4 84955.0000 74339.4221  12.5%     -   18s
H    0     0                    78793.560619 74339.4221  5.65%     -   18s
H    0     0                    77971.000000 74339.4221  4.66%     -   18s
     0     0 74356.1294    0    3 77971.0000 74356.1294  4.64%     -   18s
H    0     0                    77564.000000 74356.1294  4.14%     -   18s
H    0     0                    74490.000000 74356.1294  0.18%     -   18s
     0     2 74357.1409    0    3 74490.0000 74357.1409  0.18%     -   19s
     1     3 74439.4545    1    1 74490.0000 74438.8962  0.07%   477   20s

Cutting planes:
  Implied bound: 73

Explored 15 nodes (15832 simplex iterations) in 21.49 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 7.449000000000e+04, best bound 7.449000000000e+04, gap 0.0%