Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:59:50 2012

Optimize a model with 769 rows, 125 columns and 1538 nonzeros
Presolve removed 305 rows and 0 columns
Presolve time: 0.01s
Presolved: 464 rows, 125 columns, 1202 nonzeros
Variable types: 0 continuous, 125 integer (125 binary)
Found heuristic solution: objective 28.0000000

Root relaxation: objective 4.176188e+01, 327 iterations, 0.01 seconds

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

     0     0   41.76188    0  124   28.00000   41.76188  49.1%     -    0s
     0     0   41.47090    0  125   28.00000   41.47090  48.1%     -    0s
     0     0   41.34742    0  123   28.00000   41.34742  47.7%     -    0s
H    0     0                      30.0000000   41.34742  37.8%     -    0s
     0     0   41.24299    0  124   30.00000   41.24299  37.5%     -    0s
     0     0   41.13025    0  123   30.00000   41.13025  37.1%     -    0s
     0     0   41.03603    0  123   30.00000   41.03603  36.8%     -    0s
     0     0   40.93825    0  124   30.00000   40.93825  36.5%     -    0s
H    0     0                      31.0000000   40.93825  32.1%     -    0s
     0     0   40.88072    0  124   31.00000   40.88072  31.9%     -    0s
     0     0   40.83596    0  124   31.00000   40.83596  31.7%     -    0s
     0     0   40.75119    0  124   31.00000   40.75119  31.5%     -    0s
     0     0   40.74436    0  124   31.00000   40.74436  31.4%     -    0s
     0     0   40.74436    0  124   31.00000   40.74436  31.4%     -    0s
     0     2   40.74334    0  124   31.00000   40.74334  31.4%     -    0s
H   30    18                      33.0000000   40.48189  22.7%  48.1    0s

Explored 3866 nodes (102057 simplex iterations) in 4.31 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 3.300000000000e+01, best bound 3.300000000000e+01, gap 0.0%