Gurobi 5.0.1 (linux64) logging started Sun Nov 18 05:26:16 2012 Optimize a model with 265 rows, 281 columns and 941 nonzeros Presolve removed 0 rows and 22 columns Presolve time: 0.00s Presolved: 265 rows, 259 columns, 919 nonzeros Variable types: 0 continuous, 259 integer (258 binary) Found heuristic solution: objective 50.0000000 Root relaxation: objective 0.000000e+00, 196 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 110 50.00000 0.00000 100% - 0s H 0 0 25.0000000 0.00000 100% - 0s 0 0 0.17618 0 112 25.00000 0.17618 99.3% - 0s H 0 0 15.0000000 0.17618 98.8% - 0s 0 0 0.76861 0 118 15.00000 0.76861 94.9% - 0s H 0 0 8.0000000 0.76861 90.4% - 0s 0 0 0.76861 0 118 8.00000 0.76861 90.4% - 0s H 0 0 7.0000000 0.76861 89.0% - 0s 0 2 0.77917 0 118 7.00000 0.77917 88.9% - 0s * 32 12 21 4.0000000 1.00000 75.0% 28.6 0s Cutting planes: Gomory: 4 Zero half: 1 Explored 98 nodes (3029 simplex iterations) in 0.12 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.000000000000e+00, best bound 4.000000000000e+00, gap 0.0%