Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:52:09 2012

Optimize a model with 670 rows, 115 columns and 1340 nonzeros
Presolve removed 254 rows and 0 columns
Presolve time: 0.00s
Presolved: 416 rows, 115 columns, 1055 nonzeros
Variable types: 0 continuous, 115 integer (115 binary)
Found heuristic solution: objective 26.0000000

Root relaxation: objective 4.054145e+01, 316 iterations, 0.01 seconds

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

     0     0   40.54145    0  115   26.00000   40.54145  55.9%     -    0s
H    0     0                      31.0000000   40.54145  30.8%     -    0s
     0     0   39.95351    0  115   31.00000   39.95351  28.9%     -    0s
     0     0   39.83563    0  115   31.00000   39.83563  28.5%     -    0s
     0     0   39.60139    0  115   31.00000   39.60139  27.7%     -    0s
     0     0   39.49436    0  114   31.00000   39.49436  27.4%     -    0s
     0     0   39.49147    0  114   31.00000   39.49147  27.4%     -    0s
     0     0   39.49147    0  114   31.00000   39.49147  27.4%     -    0s
     0     2   39.49059    0  114   31.00000   39.49059  27.4%     -    0s
*   16    14              12      32.0000000   39.48536  23.4%  40.2    0s
*  532   106               9      33.0000000   36.18421  9.65%  27.3    0s
* 1053    57              19      34.0000000   35.55780  4.58%  27.5    1s

Explored 1168 nodes (31336 simplex iterations) in 1.39 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 3.400000000000e+01, best bound 3.400000000000e+01, gap 0.0%