Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:50:56 2013

Optimize a model with 41728 rows, 41088 columns and 163968 nonzeros
Presolve removed 64 rows and 0 columns
Presolve time: 0.19s
Presolved: 41664 rows, 41088 columns, 163904 nonzeros
Variable types: 41024 continuous, 64 integer (64 binary)

Root relaxation: objective 5.569091e+04, 5072 iterations, 2.64 seconds

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

     0     0 55690.9140    0   56          - 55690.9140     -      -    3s
H    0     0                    80695.000000 55690.9140  31.0%     -    4s
     0     0 66148.0140    0    8 80695.0000 66148.0140  18.0%     -    7s
H    0     0                    78555.047243 66148.0140  15.8%     -    7s
H    0     0                    76123.000000 66148.0140  13.1%     -    8s
H    0     0                    75810.000000 66148.0140  12.7%     -    8s
     0     0 67199.3219    0    4 75810.0000 67199.3219  11.4%     -    8s
H    0     0                    72641.983618 67199.3219  7.49%     -    8s
H    0     0                    71191.000000 67199.3219  5.61%     -    8s
     0     0 67543.5745    0    1 71191.0000 67543.5745  5.12%     -    9s
H    0     0                    68876.000000 67543.5745  1.93%     -    9s
H    0     0                    68249.000000 67543.5745  1.03%     -    9s
H    0     0                    67565.000000 67543.5745  0.03%     -    9s
     0     0     cutoff    0      67565.0000 67565.0000   0.0%     -    9s

Cutting planes:
  Implied bound: 60

Explored 0 nodes (10319 simplex iterations) in 9.68 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 6.756500000000e+04, best bound 6.756500000000e+04, gap 0.0%