Gurobi 5.0.1 (linux64) logging started Fri Jan 18 01:40:21 2013

Optimize a model with 52 rows, 312 columns and 1906 nonzeros
Presolve removed 22 rows and 83 columns
Presolve time: 0.00s
Presolved: 30 rows, 229 columns, 1656 nonzeros
Variable types: 217 continuous, 12 integer (12 binary)
Found heuristic solution: objective 5311.2306542

Root relaxation: objective 5.281733e+03, 12 iterations, 0.00 seconds

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

     0     0 5281.73269    0    3 5311.23065 5281.73269  0.56%     -    0s
     0     0 5294.86714    0    5 5311.23065 5294.86714  0.31%     -    0s
     0     0 5294.86714    0    2 5311.23065 5294.86714  0.31%     -    0s
     0     0 5294.96084    0    5 5311.23065 5294.96084  0.31%     -    0s
     0     0 5295.01802    0    5 5311.23065 5295.01802  0.31%     -    0s
     0     0 5295.01802    0    5 5311.23065 5295.01802  0.31%     -    0s
     0     2 5295.50992    0    5 5311.23065 5295.50992  0.30%     -    0s
*    5     3               5    5296.3077927 5296.20169  0.00%   2.2    0s

Cutting planes:
  Gomory: 1
  Implied bound: 1
  Flow cover: 2

Explored 6 nodes (79 simplex iterations) in 0.03 seconds
Thread count was 1 (of 16 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 5.296307792671e+03, best bound 5.296201688154e+03, gap 0.0020%