Gurobi 5.0.1 (linux64) logging started Wed Apr 24 02:05:40 2013

Optimize a model with 45694 rows, 45024 columns and 179694 nonzeros
Presolve removed 67 rows and 0 columns
Presolve time: 0.20s
Presolved: 45627 rows, 45024 columns, 179627 nonzeros
Variable types: 44957 continuous, 67 integer (67 binary)

Root relaxation: objective 5.680167e+04, 6766 iterations, 4.78 seconds

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

     0     0 56801.6681    0   60          - 56801.6681     -      -    5s
H    0     0                    98144.000000 56801.6681  42.1%     -    8s
     0     0 75569.7157    0    7 98144.0000 75569.7157  23.0%     -   14s
H    0     0                    81280.688808 75569.7157  7.03%     -   14s
H    0     0                    78358.000000 75569.7157  3.56%     -   14s
     0     0 76874.1285    0    8 78358.0000 76874.1285  1.89%     -   15s
     0     0 76925.9801    0    7 78358.0000 76925.9801  1.83%     -   15s
H    0     0                    78323.000000 76925.9801  1.78%     -   15s
     0     0 76926.2631    0    6 78323.0000 76926.2631  1.78%     -   15s
H    0     0                    78145.000000 76926.2631  1.56%     -   16s
     0     2 76932.1114    0    6 78145.0000 76932.1114  1.55%     -   16s
H    4     4                    78124.921569 77144.3238  1.26%   252   17s
H    6     6                    77652.500000 77144.3238  0.65%   196   17s
*    7     7               5    77192.000000 77144.3238  0.06%   174   17s

Cutting planes:
  Implied bound: 64

Explored 12 nodes (13654 simplex iterations) in 17.63 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 7.719200000000e+04, best bound 7.718519018728e+04, gap 0.0088%