Gurobi 5.0.1 (linux64) logging started Sun Nov 18 02:49:24 2012 Optimize a model with 409 rows, 269 columns and 1289 nonzeros Presolve time: 0.00s Presolved: 409 rows, 269 columns, 1289 nonzeros Variable types: 0 continuous, 269 integer (269 binary) Found heuristic solution: objective 94.0000000 Root relaxation: objective 0.000000e+00, 87 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 65 94.00000 0.00000 100% - 0s H 0 0 74.0000000 0.00000 100% - 0s 0 0 0.62485 0 66 74.00000 0.62485 99.2% - 0s 0 0 1.15543 0 68 74.00000 1.15543 98.4% - 0s 0 0 1.85377 0 69 74.00000 1.85377 97.5% - 0s 0 0 1.90762 0 69 74.00000 1.90762 97.4% - 0s 0 0 1.91550 0 69 74.00000 1.91550 97.4% - 0s 0 2 1.91980 0 69 74.00000 1.91980 97.4% - 0s * 52 49 31 71.0000000 5.50448 92.2% 27.9 0s * 107 88 32 70.0000000 5.54895 92.1% 27.1 0s * 150 107 27 63.0000000 10.26863 83.7% 27.5 0s * 213 150 24 59.0000000 10.30295 82.5% 28.9 0s * 867 470 30 58.0000000 19.55065 66.3% 29.8 1s * 888 454 32 57.0000000 19.55065 65.7% 29.6 1s * 1015 439 31 56.0000000 20.17647 64.0% 29.5 1s * 1178 444 29 54.0000000 21.78030 59.7% 29.4 1s * 1272 414 30 52.0000000 23.95833 53.9% 29.4 1s H 1600 427 51.0000000 24.95455 51.1% 29.2 2s 3898 895 39.45283 20 118 51.00000 31.57143 38.1% 27.1 5s 8896 1364 infeasible 27 51.00000 37.12500 27.2% 25.3 10s 15098 1214 49.66667 25 134 51.00000 40.45714 20.7% 24.2 15s *20457 553 27 50.0000000 43.66667 12.7% 23.5 18s Cutting planes: Gomory: 3 Mod-K: 2 Explored 21639 nodes (502077 simplex iterations) in 19.86 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 5.000000000000e+01, best bound 5.000000000000e+01, gap 0.0%