Gurobi 5.0.1 (linux64) logging started Wed Apr 24 01:04:04 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 3.557881e+04, 1946 iterations, 0.34 seconds

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

     0     0 35578.8098    0   36          - 35578.8098     -      -    0s
H    0     0                    43138.000000 35578.8098  17.5%     -    0s
     0     0 38882.0968    0    5 43138.0000 38882.0968  9.87%     -    1s
H    0     0                    41074.748744 38882.0968  5.34%     -    1s
H    0     0                    39995.000000 38882.0968  2.78%     -    1s
H    0     0                    38890.000000 38882.0968  0.02%     -    1s
     0     0 38885.1905    0    5 38890.0000 38885.1905  0.01%     -    1s
     0     0 38887.2878    0    4 38890.0000 38887.2878  0.01%     -    1s

Cutting planes:
  Implied bound: 35

Explored 0 nodes (2919 simplex iterations) in 1.69 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 3.889000000000e+04, best bound 3.888728780475e+04, gap 0.0070%