Gurobi 5.0.1 (linux64) logging started Sun Nov 18 03:20:29 2012 Optimize a model with 239 rows, 184 columns and 779 nonzeros Presolve time: 0.00s Presolved: 239 rows, 184 columns, 779 nonzeros Variable types: 0 continuous, 184 integer (184 binary) Found heuristic solution: objective 57.0000000 Root relaxation: objective 0.000000e+00, 97 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 65 57.00000 0.00000 100% - 0s H 0 0 41.0000000 0.00000 100% - 0s H 0 0 40.0000000 0.00000 100% - 0s 0 0 0.61857 0 67 40.00000 0.61857 98.5% - 0s H 0 0 33.0000000 0.61857 98.1% - 0s 0 0 0.64191 0 67 33.00000 0.64191 98.1% - 0s 0 0 0.70027 0 68 33.00000 0.70027 97.9% - 0s 0 0 0.73005 0 71 33.00000 0.73005 97.8% - 0s 0 0 0.73528 0 68 33.00000 0.73528 97.8% - 0s 0 0 0.75166 0 67 33.00000 0.75166 97.7% - 0s 0 0 0.75968 0 75 33.00000 0.75968 97.7% - 0s 0 2 0.77956 0 75 33.00000 0.77956 97.6% - 0s * 26 26 16 23.0000000 3.00287 86.9% 22.7 0s * 31 21 16 22.0000000 3.00287 86.4% 20.0 0s * 131 57 9 20.0000000 9.30651 53.5% 20.4 0s Cutting planes: Gomory: 1 Mod-K: 5 Explored 561 nodes (9660 simplex iterations) in 0.35 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.000000000000e+01, best bound 2.000000000000e+01, gap 0.0%