Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:13:25 2013

Optimize a model with 26622 rows, 26112 columns and 104142 nonzeros
Presolve removed 51 rows and 0 columns
Presolve time: 0.12s
Presolved: 26571 rows, 26112 columns, 104091 nonzeros
Variable types: 26061 continuous, 51 integer (51 binary)

Root relaxation: objective 5.543967e+04, 5787 iterations, 2.59 seconds

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

     0     0 55439.6680    0   44          - 55439.6680     -      -    2s
H    0     0                    76046.000000 55439.6680  27.1%     -    4s
     0     0 68641.2680    0    2 76046.0000 68641.2680  9.74%     -    5s
H    0     0                    69843.620915 68641.2680  1.72%     -    5s
H    0     0                    69545.000000 68641.2680  1.30%     -    5s
H    0     0                    68896.000000 68641.2680  0.37%     -    5s
     0     0 68799.0681    0    3 68896.0000 68799.0681  0.14%     -    5s
     0     0 68811.5913    0    2 68896.0000 68811.5913  0.12%     -    6s
H    0     0                    68859.000000 68811.5913  0.07%     -    6s
     0     0 68811.7500    0    1 68859.0000 68811.7500  0.07%     -    6s
H    0     0                    68818.000000 68811.7500  0.01%     -    6s

Cutting planes:
  Implied bound: 44

Explored 0 nodes (8490 simplex iterations) in 6.40 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 6.881800000000e+04, best bound 6.881175000000e+04, gap 0.0091%