Gurobi 5.0.1 (linux64) logging started Sat Nov 17 19:54:00 2012 Optimize a model with 215 rows, 128 columns and 663 nonzeros Presolve time: 0.00s Presolved: 215 rows, 128 columns, 663 nonzeros Variable types: 0 continuous, 128 integer (128 binary) Found heuristic solution: objective 57.0000000 Root relaxation: objective 0.000000e+00, 47 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 21 57.00000 0.00000 100% - 0s H 0 0 56.0000000 0.00000 100% - 0s H 0 0 54.0000000 0.00000 100% - 0s 0 0 1.06169 0 34 54.00000 1.06169 98.0% - 0s H 0 0 50.0000000 1.06169 97.9% - 0s 0 0 1.14656 0 35 50.00000 1.14656 97.7% - 0s 0 0 1.18666 0 35 50.00000 1.18666 97.6% - 0s 0 0 1.18666 0 35 50.00000 1.18666 97.6% - 0s 0 0 1.18666 0 35 50.00000 1.18666 97.6% - 0s 0 0 1.18666 0 35 50.00000 1.18666 97.6% - 0s H 0 0 47.0000000 1.18666 97.5% - 0s 0 2 1.23000 0 35 47.00000 1.23000 97.4% - 0s * 29 15 12 45.0000000 7.12500 84.2% 22.7 0s H 31 13 42.0000000 7.12500 83.0% 21.6 0s * 93 38 12 41.0000000 12.85714 68.6% 23.8 0s * 322 55 9 40.0000000 25.00000 37.5% 20.9 0s Cutting planes: Gomory: 1 Mod-K: 5 Explored 674 nodes (13050 simplex iterations) in 0.29 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.000000000000e+01, best bound 4.000000000000e+01, gap 0.0%