Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:25:29 2013

Optimize a model with 627 rows, 32547 columns and 65037 nonzeros
Presolve time: 0.04s
Presolved: 627 rows, 32547 columns, 65037 nonzeros
Variable types: 32490 continuous, 57 integer (57 binary)

Root relaxation: objective 5.257878e+04, 1020 iterations, 0.02 seconds

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

     0     0 52578.7824    0    7          - 52578.7824     -      -    0s
H    0     0                    53511.000000 52578.7824  1.74%     -    0s
H    0     0                    53070.000000 52578.7824  0.93%     -    0s
     0     0 52904.9681    0    4 53070.0000 52904.9681  0.31%     -    0s
     0     0 52904.9681    0    7 53070.0000 52904.9681  0.31%     -    0s
     0     0 52904.9681    0    4 53070.0000 52904.9681  0.31%     -    0s
     0     0 52910.4890    0    4 53070.0000 52910.4890  0.30%     -    0s
     0     0 52910.8593    0    3 53070.0000 52910.8593  0.30%     -    0s
     0     0 52910.8593    0    3 53070.0000 52910.8593  0.30%     -    0s
     0     0 52934.2031    0    6 53070.0000 52934.2031  0.26%     -    0s
     0     0 52950.8669    0    4 53070.0000 52950.8669  0.22%     -    0s
     0     0 52958.6692    0    2 53070.0000 52958.6692  0.21%     -    0s
     0     0 52967.5575    0    2 53070.0000 52967.5575  0.19%     -    0s
     0     0 52968.1429    0    1 53070.0000 52968.1429  0.19%     -    0s
H    0     0                    53017.000000 52968.1429  0.09%     -    0s
     0     2 52970.5753    0    1 53017.0000 52970.5753  0.09%     -    0s

Cutting planes:
  Implied bound: 57
  Flow cover: 1

Explored 3 nodes (2532 simplex iterations) in 0.75 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.301700000000e+04, best bound 5.301700000000e+04, gap 0.0%