Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:03:52 2013

Optimize a model with 20790 rows, 20340 columns and 81090 nonzeros
Presolve removed 45 rows and 0 columns
Presolve time: 0.09s
Presolved: 20745 rows, 20340 columns, 81045 nonzeros
Variable types: 20295 continuous, 45 integer (45 binary)

Root relaxation: objective 4.230719e+04, 3258 iterations, 1.08 seconds

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

     0     0 42307.1910    0   41          - 42307.1910     -      -    1s
H    0     0                    50880.000000 42307.1910  16.8%     -    1s
     0     0 47642.4149    0    3 50880.0000 47642.4149  6.36%     -    2s
H    0     0                    47816.869460 47642.4149  0.36%     -    2s
H    0     0                    47758.000000 47642.4149  0.24%     -    2s
H    0     0                    47670.000000 47642.4149  0.06%     -    2s
     0     0 47648.6533    0    2 47670.0000 47648.6533  0.04%     -    2s
     0     0 47649.0000    0    1 47670.0000 47649.0000  0.04%     -    2s
     0     2 47651.8824    0    1 47670.0000 47651.8824  0.04%     -    3s
*    3     0               2    47663.000000 47663.0000   0.0%  40.3    3s

Cutting planes:
  Implied bound: 37

Explored 4 nodes (4927 simplex iterations) in 3.08 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.766300000000e+04, best bound 4.766300000000e+04, gap 0.0%