Gurobi 5.0.1 (linux64) logging started Sat Nov 17 19:55:40 2012 Optimize a model with 269 rows, 157 columns and 827 nonzeros Presolve time: 0.00s Presolved: 269 rows, 157 columns, 827 nonzeros Variable types: 0 continuous, 157 integer (157 binary) Found heuristic solution: objective 75.0000000 Found heuristic solution: objective 72.0000000 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 23 72.00000 0.00000 100% - 0s H 0 0 64.0000000 0.00000 100% - 0s 0 0 0.91304 0 25 64.00000 0.91304 98.6% - 0s 0 0 0.97697 0 39 64.00000 0.97697 98.5% - 0s 0 0 0.97826 0 25 64.00000 0.97826 98.5% - 0s 0 0 0.97826 0 25 64.00000 0.97826 98.5% - 0s 0 0 0.97826 0 25 64.00000 0.97826 98.5% - 0s 0 0 0.97826 0 25 64.00000 0.97826 98.5% - 0s H 0 0 63.0000000 0.97826 98.4% - 0s 0 2 1.15852 0 25 63.00000 1.15852 98.2% - 0s * 47 37 13 62.0000000 5.52473 91.1% 30.3 0s * 53 39 14 61.0000000 5.52473 90.9% 28.0 0s * 79 52 15 59.0000000 12.16667 79.4% 26.5 0s * 154 96 15 58.0000000 18.00000 69.0% 26.3 0s * 412 176 15 57.0000000 24.22222 57.5% 22.4 0s H 605 216 56.0000000 29.16667 47.9% 21.4 0s * 1002 174 24 55.0000000 29.16667 47.0% 22.2 0s * 1285 146 20 53.0000000 32.33333 39.0% 21.5 0s Cutting planes: Gomory: 1 Zero half: 3 Explored 2879 nodes (54438 simplex iterations) in 1.56 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.300000000000e+01, best bound 5.300000000000e+01, gap 0.0%