Gurobi 5.0.1 (linux64) logging started Sun Nov 18 01:00:57 2012

Optimize a model with 283 rows, 197 columns and 902 nonzeros
Presolve time: 0.00s
Presolved: 283 rows, 197 columns, 902 nonzeros
Variable types: 0 continuous, 197 integer (197 binary)
Found heuristic solution: objective 72.0000000

Root relaxation: objective 0.000000e+00, 86 iterations, 0.00 seconds

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

     0     0    0.00000    0   55   72.00000    0.00000   100%     -    0s
H    0     0                      59.0000000    0.00000   100%     -    0s
H    0     0                      57.0000000    0.00000   100%     -    0s
     0     0    0.69761    0   56   57.00000    0.69761  98.8%     -    0s
H    0     0                      54.0000000    0.69761  98.7%     -    0s
     0     0    1.36380    0   58   54.00000    1.36380  97.5%     -    0s
H    0     0                      52.0000000    1.36380  97.4%     -    0s
     0     0    1.65404    0   58   52.00000    1.65404  96.8%     -    0s
     0     0    1.65685    0   59   52.00000    1.65685  96.8%     -    0s
H    0     0                      48.0000000    1.65685  96.5%     -    0s
     0     2    1.66179    0   59   48.00000    1.66179  96.5%     -    0s
*   26    26              14      35.0000000    4.08978  88.3%  39.7    0s
*   28    23              15      34.0000000    4.08978  88.0%  38.0    0s
*   56    37              15      33.0000000    4.09869  87.6%  33.9    0s
*  233   158              15      32.0000000    9.27731  71.0%  33.4    0s
* 2335   100              20      31.0000000   25.00000  19.4%  23.9    1s

Explored 2585 nodes (60600 simplex iterations) in 1.92 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 3.100000000000e+01, best bound 3.100000000000e+01, gap 0.0%