Gurobi 5.0.1 (linux64) logging started Sun Nov 18 03:11:48 2012 Optimize a model with 141 rows, 122 columns and 472 nonzeros Presolve removed 0 rows and 2 columns Presolve time: 0.00s Presolved: 141 rows, 120 columns, 470 nonzeros Variable types: 0 continuous, 120 integer (119 binary) Found heuristic solution: objective 34.0000000 Found heuristic solution: objective 32.0000000 Root relaxation: objective 0.000000e+00, 79 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 49 32.00000 0.00000 100% - 0s H 0 0 15.0000000 0.00000 100% - 0s 0 0 0.71973 0 50 15.00000 0.71973 95.2% - 0s H 0 0 13.0000000 0.71973 94.5% - 0s 0 0 1.16923 0 52 13.00000 1.16923 91.0% - 0s H 0 0 10.0000000 1.16923 88.3% - 0s 0 0 1.56033 0 55 10.00000 1.56033 84.4% - 0s H 0 0 9.0000000 1.56033 82.7% - 0s 0 0 1.56317 0 56 9.00000 1.56317 82.6% - 0s 0 0 1.56317 0 56 9.00000 1.56317 82.6% - 0s 0 2 1.56826 0 56 9.00000 1.56826 82.6% - 0s * 15 8 9 8.0000000 2.81395 64.8% 25.0 0s Cutting planes: Gomory: 4 Zero half: 2 Mod-K: 1 Explored 59 nodes (1280 simplex iterations) in 0.09 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 8.000000000000e+00, best bound 8.000000000000e+00, gap 0.0%