Gurobi 5.0.1 (linux64) logging started Sun Nov 18 03:13:27 2012

Optimize a model with 231 rows, 174 columns and 749 nonzeros
Presolve removed 0 rows and 1 columns
Presolve time: 0.00s
Presolved: 231 rows, 173 columns, 748 nonzeros
Variable types: 0 continuous, 173 integer (172 binary)
Found heuristic solution: objective 45.0000000

Root relaxation: objective 0.000000e+00, 81 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   57   45.00000    0.00000   100%     -    0s
H    0     0                      36.0000000    0.00000   100%     -    0s
H    0     0                      34.0000000    0.00000   100%     -    0s
     0     0    0.47818    0   59   34.00000    0.47818  98.6%     -    0s
H    0     0                      32.0000000    0.47818  98.5%     -    0s
     0     0    0.91570    0   61   32.00000    0.91570  97.1%     -    0s
H    0     0                      29.0000000    0.91570  96.8%     -    0s
     0     0    0.92366    0   62   29.00000    0.92366  96.8%     -    0s
     0     2    0.92587    0   62   29.00000    0.92587  96.8%     -    0s
*   31    25              19      27.0000000    4.71174  82.5%  25.5    0s
*   48    29              10      23.0000000    6.10944  73.4%  27.2    0s
*   73    39              18      22.0000000    7.58518  65.5%  23.8    0s
*   97    48               9      21.0000000    7.65529  63.5%  25.4    0s
*  182    52               8      20.0000000   10.17033  49.1%  26.3    0s
*  237    46              12      19.0000000   12.10794  36.3%  25.1    0s
*  282    27               9      18.0000000   14.39506  20.0%  24.2    0s

Cutting planes:
  Gomory: 4
  Zero half: 1

Explored 314 nodes (7538 simplex iterations) in 0.26 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 1.800000000000e+01, best bound 1.800000000000e+01, gap 0.0%