Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:37:11 2013

Optimize a model with 671 rows, 37271 columns and 74481 nonzeros
Presolve time: 0.05s
Presolved: 671 rows, 37271 columns, 74481 nonzeros
Variable types: 37210 continuous, 61 integer (61 binary)

Root relaxation: objective 6.249467e+04, 1271 iterations, 0.03 seconds

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

     0     0 62494.6666    0   14          - 62494.6666     -      -    0s
H    0     0                    68930.000000 62494.6666  9.34%     -    0s
     0     0 62988.6684    0    6 68930.0000 62988.6684  8.62%     -    0s
H    0     0                    68710.388383 62988.6684  8.33%     -    0s
H    0     0                    67516.000000 62988.6684  6.71%     -    0s
     0     0 63031.2740    0    6 67516.0000 63031.2740  6.64%     -    0s
H    0     0                    67472.000000 63031.2740  6.58%     -    0s
     0     0 63039.7465    0    3 67472.0000 63039.7465  6.57%     -    0s
H    0     0                    65074.346226 63039.7465  3.13%     -    0s
H    0     0                    64347.000000 63039.7465  2.03%     -    0s
     0     0 63040.6746    0    3 64347.0000 63040.6746  2.03%     -    0s
     0     0 63041.1059    0    2 64347.0000 63041.1059  2.03%     -    0s
     0     0 63041.1059    0    2 64347.0000 63041.1059  2.03%     -    0s
H    0     0                    64332.000000 63041.1059  2.01%     -    0s
H    0     0                    63051.000000 63041.1059  0.02%     -    0s
     0     0 63041.1059    0    9 63051.0000 63041.1059  0.02%     -    0s
     0     0 63041.1059    0    5 63051.0000 63041.1059  0.02%     -    0s
     0     0 63041.1059    0    3 63051.0000 63041.1059  0.02%     -    0s
     0     0 63041.9278    0    1 63051.0000 63041.9278  0.01%     -    0s
     0     0 63041.9375    0    1 63051.0000 63041.9375  0.01%     -    1s
     0     0 63042.1111    0    1 63051.0000 63042.1111  0.01%     -    1s
     0     0 63042.1250    0    1 63051.0000 63042.1250  0.01%     -    1s
     0     0 63042.3402    0    1 63051.0000 63042.3402  0.01%     -    1s
     0     0 63042.5130    0    1 63051.0000 63042.5130  0.01%     -    1s
     0     0 63042.5789    0    1 63051.0000 63042.5789  0.01%     -    1s
     0     0 63042.8481    0    1 63051.0000 63042.8481  0.01%     -    1s
     0     0 63042.8919    0    1 63051.0000 63042.8919  0.01%     -    1s
     0     0 63043.2162    0    1 63051.0000 63043.2162  0.01%     -    1s
     0     0 63043.2222    0    1 63051.0000 63043.2222  0.01%     -    1s
     0     0 63047.5333    0    1 63051.0000 63047.5333  0.01%     -    1s

Cutting planes:
  Implied bound: 49
  Flow cover: 1

Explored 0 nodes (3001 simplex iterations) in 1.23 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 6.305100000000e+04, best bound 6.304753333333e+04, gap 0.0055%