Gurobi 5.0.1 (linux64) logging started Fri Jan 18 05:53:34 2013

Optimize a model with 640 rows, 14240 columns and 118620 nonzeros
Presolve removed 20 rows and 20 columns
Presolve time: 0.23s
Presolved: 620 rows, 14220 columns, 108600 nonzeros
Variable types: 14040 continuous, 180 integer (180 binary)

Root relaxation: objective 4.370285e+04, 526 iterations, 0.02 seconds

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

     0     0 43702.8549    0    6          - 43702.8549     -      -    0s
     0     0 43703.4467    0    6          - 43703.4467     -      -    0s
     0     0 43703.4771    0    7          - 43703.4771     -      -    0s
     0     0 43703.4771    0    7          - 43703.4771     -      -    0s
     0     0 43703.4771    0    7          - 43703.4771     -      -    0s
     0     0 43703.4947    0    7          - 43703.4947     -      -    0s
     0     0 43703.4947    0    7          - 43703.4947     -      -    0s
     0     0 43703.4947    0    7          - 43703.4947     -      -    0s
     0     2 43705.1963    0    7          - 43705.1963     -      -    2s
*   16    11              15    44045.009020 43707.6351  0.77%  13.4    2s
*   36    17              16    44042.769802 43766.9855  0.63%  10.9    2s
*   72    22              19    44040.849699 43831.8334  0.47%  12.2    2s
*  186    32              39    43942.093793 43888.6722  0.12%   9.0    2s
*  206    16              22    43902.426425 43899.7355  0.01%   8.6    3s

Cutting planes:
  Flow cover: 11

Explored 207 nodes (2734 simplex iterations) in 3.04 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.390242642482e+04, best bound 4.389973549342e+04, gap 0.0061%