Gurobi 5.0.1 (linux64) logging started Sat Nov 17 19:59:10 2012 Optimize a model with 303 rows, 176 columns and 931 nonzeros Presolve time: 0.00s Presolved: 303 rows, 176 columns, 931 nonzeros Variable types: 0 continuous, 176 integer (176 binary) Found heuristic solution: objective 74.0000000 Root relaxation: objective 0.000000e+00, 52 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 25 74.00000 0.00000 100% - 0s H 0 0 72.0000000 0.00000 100% - 0s H 0 0 71.0000000 0.00000 100% - 0s 0 0 0.96767 0 36 71.00000 0.96767 98.6% - 0s 0 0 1.13439 0 37 71.00000 1.13439 98.4% - 0s 0 0 1.13439 0 37 71.00000 1.13439 98.4% - 0s 0 0 1.13439 0 37 71.00000 1.13439 98.4% - 0s 0 0 1.13439 0 37 71.00000 1.13439 98.4% - 0s H 0 0 69.0000000 1.13439 98.4% - 0s H 0 0 66.0000000 1.13439 98.3% - 0s 0 2 1.95000 0 37 66.00000 1.95000 97.0% - 0s * 115 73 15 65.0000000 10.63846 83.6% 29.5 0s * 423 202 17 64.0000000 24.80000 61.2% 24.5 0s * 424 199 16 63.0000000 24.80000 60.6% 24.4 0s H 605 255 61.0000000 30.00000 50.8% 23.0 0s * 4547 611 30 60.0000000 44.00000 26.7% 18.6 2s 9928 289 57.85714 24 93 60.00000 50.66667 15.6% 17.0 5s Cutting planes: Gomory: 1 Mod-K: 2 Explored 11066 nodes (183923 simplex iterations) in 5.38 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 6.000000000000e+01, best bound 6.000000000000e+01, gap 0.0%