Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:04:06 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 3.875225e+04, 2671 iterations, 0.65 seconds

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

     0     0 38752.2482    0   43          - 38752.2482     -      -    0s
H    0     0                    50826.000000 38752.2482  23.8%     -    1s
     0     0 43942.9177    0    2 50826.0000 43942.9177  13.5%     -    2s
H    0     0                    44355.668874 43942.9177  0.93%     -    2s
H    0     0                    44219.000000 43942.9177  0.62%     -    2s
H    0     0                    44032.000000 43942.9177  0.20%     -    2s
     0     1 44018.0702    0    3 44032.0000 44018.0702  0.03%     -    2s

Cutting planes:
  Implied bound: 40

Explored 6 nodes (4256 simplex iterations) in 2.75 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 4.403200000000e+04, best bound 4.403200000000e+04, gap 0.0%