Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:48:44 2012 Optimize a model with 228 rows, 71 columns and 456 nonzeros Presolve removed 71 rows and 5 columns Presolve time: 0.00s Presolved: 157 rows, 66 columns, 352 nonzeros Variable types: 0 continuous, 66 integer (66 binary) Found heuristic solution: objective 25.0000000 Root relaxation: objective 2.850000e+01, 112 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 28.50000 0 49 25.00000 28.50000 14.0% - 0s 0 0 28.00000 0 53 25.00000 28.00000 12.0% - 0s H 0 0 26.0000000 28.00000 7.69% - 0s 0 0 27.83333 0 62 26.00000 27.83333 7.05% - 0s 0 0 27.66667 0 54 26.00000 27.66667 6.41% - 0s 0 0 27.57143 0 57 26.00000 27.57143 6.04% - 0s 0 0 27.20000 0 58 26.00000 27.20000 4.62% - 0s 0 0 cutoff 0 26.00000 26.99997 3.85% - 0s Cutting planes: Gomory: 1 Zero half: 53 Explored 0 nodes (341 simplex iterations) in 0.02 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.600000000000e+01, best bound 2.600000000000e+01, gap 0.0%