Gurobi 5.0.1 (linux64) logging started Sun Nov 18 06:06:13 2012 Optimize a model with 421 rows, 413 columns and 1463 nonzeros Presolve removed 0 rows and 24 columns Presolve time: 0.00s Presolved: 421 rows, 389 columns, 1439 nonzeros Variable types: 0 continuous, 389 integer (388 binary) Found heuristic solution: objective 75.0000000 Root relaxation: objective 0.000000e+00, 236 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 0 172 75.00000 0.00000 100% - 0s H 0 0 48.0000000 0.00000 100% - 0s H 0 0 46.0000000 0.00000 100% - 0s 0 0 0.24393 0 174 46.00000 0.24393 99.5% - 0s H 0 0 29.0000000 0.24393 99.2% - 0s 0 0 0.79654 0 177 29.00000 0.79654 97.3% - 0s H 0 0 28.0000000 0.79654 97.2% - 0s 0 0 0.79654 0 177 28.00000 0.79654 97.2% - 0s H 0 0 26.0000000 0.79654 96.9% - 0s 0 2 0.81077 0 177 26.00000 0.81077 96.9% - 0s H 44 35 13.0000000 1.00000 92.3% 28.9 0s H 222 77 11.0000000 3.08824 71.9% 27.4 0s * 306 64 10 10.0000000 4.55000 54.5% 27.6 0s Cutting planes: Gomory: 4 Mod-K: 1 Explored 490 nodes (14043 simplex iterations) in 0.56 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.000000000000e+01, best bound 1.000000000000e+01, gap 0.0%