Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:48:42 2012 Optimize a model with 224 rows, 66 columns and 448 nonzeros Presolve removed 85 rows and 3 columns Presolve time: 0.00s Presolved: 139 rows, 63 columns, 324 nonzeros Variable types: 0 continuous, 63 integer (63 binary) Found heuristic solution: objective 23.0000000 Root relaxation: objective 2.660000e+01, 92 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 26.60000 0 51 23.00000 26.60000 15.7% - 0s H 0 0 24.0000000 26.60000 10.8% - 0s 0 0 26.00000 0 54 24.00000 26.00000 8.33% - 0s 0 0 26.00000 0 48 24.00000 26.00000 8.33% - 0s 0 0 26.00000 0 55 24.00000 26.00000 8.33% - 0s 0 0 26.00000 0 55 24.00000 26.00000 8.33% - 0s 0 2 26.00000 0 53 24.00000 26.00000 8.33% - 0s Cutting planes: Gomory: 1 Zero half: 10 Explored 15 nodes (484 simplex iterations) in 0.02 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.400000000000e+01, best bound 2.400000000000e+01, gap 0.0%