Gurobi 5.0.1 (linux64) logging started Sun Nov 18 06:08:20 2012 Optimize a model with 429 rows, 419 columns and 1489 nonzeros Presolve removed 0 rows and 15 columns Presolve time: 0.00s Presolved: 429 rows, 404 columns, 1474 nonzeros Variable types: 0 continuous, 404 integer (403 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 0 171 75.00000 0.00000 100% - 0s H 0 0 68.0000000 0.00000 100% - 0s H 0 0 59.0000000 0.00000 100% - 0s H 0 0 58.0000000 0.00000 100% - 0s 0 0 0.32274 0 173 58.00000 0.32274 99.4% - 0s H 0 0 45.0000000 0.32274 99.3% - 0s 0 0 0.66667 0 173 45.00000 0.66667 98.5% - 0s 0 0 0.66667 0 175 45.00000 0.66667 98.5% - 0s H 0 0 40.0000000 0.66667 98.3% - 0s H 0 0 37.0000000 0.66667 98.2% - 0s 0 0 0.66667 0 173 37.00000 0.66667 98.2% - 0s H 0 0 29.0000000 0.66667 97.7% - 0s 0 0 0.66667 0 173 29.00000 0.66667 97.7% - 0s H 0 0 24.0000000 0.66667 97.2% - 0s 0 0 0.66667 0 173 24.00000 0.66667 97.2% - 0s 0 0 0.66667 0 173 24.00000 0.66667 97.2% - 0s H 0 0 22.0000000 0.66667 97.0% - 0s H 0 0 21.0000000 0.66667 96.8% - 0s 0 2 0.66667 0 173 21.00000 0.66667 96.8% - 0s H 27 27 18.0000000 1.00000 94.4% 37.6 0s * 49 37 32 11.0000000 1.00000 90.9% 25.5 0s * 198 100 25 10.0000000 1.00000 90.0% 24.9 0s * 1175 16 20 9.0000000 7.47368 17.0% 27.9 1s Cutting planes: Gomory: 3 Explored 1193 nodes (35475 simplex iterations) in 1.28 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 9.000000000000e+00, best bound 9.000000000000e+00, gap 0.0%