Gurobi 5.0.1 (linux64) logging started Sun Nov 18 03:38:17 2012 Optimize a model with 271 rows, 214 columns and 889 nonzeros Presolve removed 0 rows and 2 columns Presolve time: 0.00s Presolved: 271 rows, 212 columns, 887 nonzeros Variable types: 0 continuous, 212 integer (211 binary) Found heuristic solution: objective 43.0000000 Root relaxation: objective 0.000000e+00, 117 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 76 43.00000 0.00000 100% - 0s H 0 0 42.0000000 0.00000 100% - 0s 0 0 0.79665 0 77 42.00000 0.79665 98.1% - 0s H 0 0 41.0000000 0.79665 98.1% - 0s 0 0 1.25471 0 79 41.00000 1.25471 96.9% - 0s H 0 0 39.0000000 1.25471 96.8% - 0s 0 0 1.25863 0 81 39.00000 1.25863 96.8% - 0s 0 0 1.25863 0 81 39.00000 1.25863 96.8% - 0s H 0 0 38.0000000 1.25863 96.7% - 0s H 0 0 33.0000000 1.25863 96.2% - 0s 0 2 1.26129 0 81 33.00000 1.26129 96.2% - 0s H 27 21 21.0000000 3.66043 82.6% 27.2 0s * 31 19 18 20.0000000 3.66043 81.7% 25.2 0s Cutting planes: Gomory: 3 Mod-K: 1 Explored 1260 nodes (26881 simplex iterations) in 0.79 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%