Gurobi 5.0.1 (linux64) logging started Sat Nov 17 23:56:53 2012 Optimize a model with 247 rows, 172 columns and 787 nonzeros Presolve time: 0.00s Presolved: 247 rows, 172 columns, 787 nonzeros Variable types: 0 continuous, 172 integer (172 binary) Found heuristic solution: objective 59.0000000 Root relaxation: objective 0.000000e+00, 94 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 48 59.00000 0.00000 100% - 0s H 0 0 52.0000000 0.00000 100% - 0s 0 0 0.54762 0 49 52.00000 0.54762 98.9% - 0s 0 0 0.60022 0 51 52.00000 0.60022 98.8% - 0s H 0 0 49.0000000 0.60022 98.8% - 0s 0 0 0.61905 0 50 49.00000 0.61905 98.7% - 0s 0 0 0.66667 0 50 49.00000 0.66667 98.6% - 0s 0 0 0.68328 0 52 49.00000 0.68328 98.6% - 0s 0 0 0.71763 0 53 49.00000 0.71763 98.5% - 0s 0 0 0.74937 0 54 49.00000 0.74937 98.5% - 0s 0 0 0.76076 0 52 49.00000 0.76076 98.4% - 0s H 0 0 46.0000000 0.76076 98.3% - 0s H 0 0 42.0000000 0.76076 98.2% - 0s H 0 0 41.0000000 0.76076 98.1% - 0s 0 2 0.80519 0 52 41.00000 0.80519 98.0% - 0s * 32 31 20 35.0000000 5.55238 84.1% 28.8 0s * 110 73 15 32.0000000 8.63736 73.0% 26.1 0s * 131 81 13 30.0000000 14.40000 52.0% 26.3 0s * 135 72 12 29.0000000 14.40000 50.3% 25.7 0s Cutting planes: Gomory: 1 Mod-K: 4 Explored 878 nodes (17485 simplex iterations) in 0.50 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.900000000000e+01, best bound 2.900000000000e+01, gap 0.0%