Gurobi 5.0.1 (linux64) logging started Wed Apr 24 02:15:42 2013

Optimize a model with 48438 rows, 47748 columns and 190578 nonzeros
Presolve removed 69 rows and 0 columns
Presolve time: 0.21s
Presolved: 48369 rows, 47748 columns, 190509 nonzeros
Variable types: 47679 continuous, 69 integer (69 binary)

Root relaxation: objective 5.689887e+04, 6196 iterations, 3.30 seconds

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

     0     0 56898.8721    0   52          - 56898.8721     -      -    3s
H    0     0                    85233.000000 56898.8721  33.2%     -    5s
     0     0 68903.1052    0   11 85233.0000 68903.1052  19.2%     -    9s
H    0     0                    80543.374434 68903.1052  14.5%     -    9s
H    0     0                    76782.000000 68903.1052  10.3%     -    9s
     0     0 69665.1211    0    6 76782.0000 69665.1211  9.27%     -   10s
H    0     0                    74852.397317 69665.1211  6.93%     -   10s
H    0     0                    72480.000000 69665.1211  3.88%     -   11s
     0     0 69830.1995    0    3 72480.0000 69830.1995  3.66%     -   11s
H    0     0                    71653.000000 69830.1995  2.54%     -   11s
     0     0 70040.3562    0    4 71653.0000 70040.3562  2.25%     -   12s
     0     0 70146.6052    0    5 71653.0000 70146.6052  2.10%     -   12s
     0     0 70205.1534    0    4 71653.0000 70205.1534  2.02%     -   12s
H    0     0                    71500.000000 70205.1534  1.81%     -   13s
     0     2 70219.0209    0    4 71500.0000 70219.0209  1.79%     -   13s
H    2     2                    71476.634615 70410.1290  1.49%   145   14s
H    7     6                    71050.340426 70428.4258  0.88%   143   14s
     8     9 70729.2245    7    3 71050.3404 70428.4258  0.88%   199   15s
H   10     8                    70740.958333 70428.4258  0.44%   179   15s
*   11     5               9    70736.000000 70428.4258  0.43%   165   15s
H   15     3                    70714.645161 70438.0377  0.39%   135   15s
H   16     4                    70709.789474 70438.0377  0.38%   131   15s
*   37     9               8    70702.000000 70442.4367  0.37%   115   16s
*   49     0               5    70644.000000 70644.0000   0.0%   108   16s

Cutting planes:
  Implied bound: 68

Explored 50 nodes (17284 simplex iterations) in 16.97 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 7.064400000000e+04, best bound 7.064400000000e+04, gap 0.0%