Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:31:46 2013

Optimize a model with 35518 rows, 34928 columns and 139358 nonzeros
Presolve removed 59 rows and 0 columns
Presolve time: 0.15s
Presolved: 35459 rows, 34928 columns, 139299 nonzeros
Variable types: 34869 continuous, 59 integer (59 binary)

Root relaxation: objective 5.309534e+04, 4944 iterations, 2.87 seconds

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

     0     0 53095.3447    0   53          - 53095.3447     -      -    3s
H    0     0                    75442.000000 53095.3447  29.6%     -    4s
     0     0 68813.4668    0    4 75442.0000 68813.4668  8.79%     -    7s
H    0     0                    70585.752514 68813.4668  2.51%     -    7s
H    0     0                    69572.000000 68813.4668  1.09%     -    7s
H    0     0                    69571.000000 68813.4668  1.09%     -    7s
     0     0 69072.5005    0    3 69571.0000 69072.5005  0.72%     -    8s
H    0     0                    69106.000000 69072.5005  0.05%     -    8s
     0     0 69090.7647    0    1 69106.0000 69090.7647  0.02%     -    8s
     0     0 69090.7647    0   48 69106.0000 69090.7647  0.02%     -   11s
     0     0 69090.7647    0    1 69106.0000 69090.7647  0.02%     -   16s
     0     0 69103.4615    0    1 69106.0000 69103.4615  0.00%     -   16s

Cutting planes:
  Gomory: 7
  Implied bound: 44

Explored 0 nodes (15082 simplex iterations) in 16.42 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 6.910600000000e+04, best bound 6.910346153846e+04, gap 0.0037%