Gurobi 5.0.1 (linux64) logging started Sun Nov 18 05:27:47 2012 Optimize a model with 239 rows, 273 columns and 868 nonzeros Presolve removed 0 rows and 31 columns Presolve time: 0.00s Presolved: 239 rows, 242 columns, 837 nonzeros Variable types: 0 continuous, 242 integer (241 binary) Found heuristic solution: objective 25.0000000 Root relaxation: objective 0.000000e+00, 141 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 84 25.00000 0.00000 100% - 0s H 0 0 14.0000000 0.00000 100% - 0s H 0 0 10.0000000 0.00000 100% - 0s H 0 0 8.0000000 0.00000 100% - 0s 0 0 0.00000 0 86 8.00000 0.00000 100% - 0s H 0 0 6.0000000 0.00000 100% - 0s 0 0 0.00000 0 84 6.00000 0.00000 100% - 0s H 0 0 4.0000000 0.00000 100% - 0s 0 0 0.00000 0 84 4.00000 0.00000 100% - 0s 0 0 0.00000 0 84 4.00000 0.00000 100% - 0s 0 2 0.00000 0 84 4.00000 0.00000 100% - 0s H 11 11 3.0000000 0.27632 90.8% 49.0 0s * 27 8 25 2.0000000 0.27632 86.2% 23.0 0s Cutting planes: Mod-K: 1 Explored 40 nodes (2047 simplex iterations) in 0.12 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.000000000000e+00, best bound 2.000000000000e+00, gap 0.0%