Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:45:53 2013

Optimize a model with 40446 rows, 39816 columns and 158886 nonzeros
Presolve removed 63 rows and 0 columns
Presolve time: 0.18s
Presolved: 40383 rows, 39816 columns, 158823 nonzeros
Variable types: 39753 continuous, 63 integer (63 binary)

Root simplex log...

Iteration    Objective       Primal Inf.    Dual Inf.      Time
    6810    6.0838135e+04   0.000000e+00   0.000000e+00      5s

Root relaxation: objective 6.083813e+04, 6810 iterations, 5.04 seconds

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

     0     0 60838.1346    0   56          - 60838.1346     -      -    5s
H    0     0                    96191.000000 60838.1346  36.8%     -    8s
     0     0 84522.9003    0    8 96191.0000 84522.9003  12.1%     -   11s
H    0     0                    93360.859008 84522.9003  9.47%     -   11s
H    0     0                    87678.000000 84522.9003  3.60%     -   11s
     0     0 84948.1097    0    7 87678.0000 84948.1097  3.11%     -   12s
H    0     0                    87044.000000 84948.1097  2.41%     -   12s
H    0     0                    85019.000000 84948.1097  0.08%     -   12s
     0     0 84955.8457    0    6 85019.0000 84955.8457  0.07%     -   12s
     0     0 84971.1831    0    3 85019.0000 84971.1831  0.06%     -   12s
     0     0 84971.1831    0    1 85019.0000 84971.1831  0.06%     -   13s
     0     2 84977.6650    0    1 85019.0000 84977.6650  0.05%     -   13s

Cutting planes:
  Implied bound: 59

Explored 3 nodes (12126 simplex iterations) in 13.54 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 8.501900000000e+04, best bound 8.501900000000e+04, gap 0.0%