Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:48:43 2012 Optimize a model with 229 rows, 69 columns and 458 nonzeros Presolve removed 66 rows and 4 columns Presolve time: 0.00s Presolved: 163 rows, 65 columns, 365 nonzeros Variable types: 0 continuous, 65 integer (65 binary) Found heuristic solution: objective 24.0000000 Root relaxation: objective 2.950000e+01, 70 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 29.50000 0 53 24.00000 29.50000 22.9% - 0s 0 0 28.71429 0 63 24.00000 28.71429 19.6% - 0s H 0 0 26.0000000 28.71429 10.4% - 0s 0 0 28.00000 0 61 26.00000 28.00000 7.69% - 0s 0 0 27.80952 0 65 26.00000 27.80952 6.96% - 0s 0 0 27.42623 0 63 26.00000 27.42623 5.49% - 0s 0 0 27.41772 0 65 26.00000 27.41772 5.45% - 0s 0 0 27.41772 0 65 26.00000 27.41772 5.45% - 0s 0 2 27.40000 0 65 26.00000 27.40000 5.38% - 0s Cutting planes: Zero half: 27 Explored 8 nodes (413 simplex iterations) in 0.03 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%