Gurobi 5.0.1 (linux64) logging started Fri Jan 18 07:08:47 2013 Optimize a model with 68 rows, 2066 columns and 24148 nonzeros Presolve removed 22 rows and 33 columns Presolve time: 0.07s Presolved: 46 rows, 2033 columns, 22084 nonzeros Variable types: 2013 continuous, 20 integer (20 binary) Root relaxation: objective 5.420106e+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 5420.10604 0 3 - 5420.10604 - - 0s 0 0 5421.38325 0 3 - 5421.38325 - - 0s 0 0 5438.34216 0 3 - 5438.34216 - - 0s 0 0 5440.52394 0 3 - 5440.52394 - - 0s 0 0 5441.36352 0 3 - 5441.36352 - - 0s 0 0 5441.36352 0 3 - 5441.36352 - - 0s 0 0 5441.36352 0 3 - 5441.36352 - - 0s 0 0 5441.36810 0 4 - 5441.36810 - - 0s 0 0 5441.36878 0 6 - 5441.36878 - - 0s 0 0 5441.36878 0 6 - 5441.36878 - - 0s 0 0 5441.36878 0 6 - 5441.36878 - - 0s 0 2 5441.37126 0 6 - 5441.37126 - - 0s * 12 5 12 5445.2743024 5441.38759 0.07% 4.4 0s * 25 4 7 5441.6179642 5441.49114 0.00% 3.6 0s Cutting planes: Cover: 1 Implied bound: 1 Flow cover: 5 Explored 26 nodes (225 simplex iterations) in 0.83 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.441617964219e+03, best bound 5.441491137911e+03, gap 0.0023%