Gurobi 5.0.1 (linux64) logging started Sun Nov 18 04:23:45 2012

Optimize a model with 377 rows, 279 columns and 1219 nonzeros
Presolve removed 0 rows and 1 columns
Presolve time: 0.00s
Presolved: 377 rows, 278 columns, 1218 nonzeros
Variable types: 0 continuous, 278 integer (277 binary)
Found heuristic solution: objective 70.0000000

Root relaxation: objective 0.000000e+00, 127 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   89   70.00000    0.00000   100%     -    0s
H    0     0                      65.0000000    0.00000   100%     -    0s
H    0     0                      62.0000000    0.00000   100%     -    0s
     0     0    0.48327    0   92   62.00000    0.48327  99.2%     -    0s
H    0     0                      58.0000000    0.48327  99.2%     -    0s
     0     0    1.06719    0   91   58.00000    1.06719  98.2%     -    0s
H    0     0                      55.0000000    1.06719  98.1%     -    0s
     0     0    1.58537    0   93   55.00000    1.58537  97.1%     -    0s
H    0     0                      53.0000000    1.58537  97.0%     -    0s
     0     0    1.59756    0   93   53.00000    1.59756  97.0%     -    0s
     0     0    1.59756    0   92   53.00000    1.59756  97.0%     -    0s
     0     2    1.59756    0   92   53.00000    1.59756  97.0%     -    0s
*   52    44              30      42.0000000    5.26829  87.5%  25.8    0s
*   77    47              16      35.0000000    5.26829  84.9%  28.0    0s
*  225   135              19      31.0000000   10.90432  64.8%  31.5    0s

Explored 2016 nodes (53112 simplex iterations) in 2.23 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%