Gurobi 5.0.1 (linux64) logging started Sun Nov 18 04:19:43 2012 Optimize a model with 421 rows, 299 columns and 1349 nonzeros Presolve time: 0.00s Presolved: 421 rows, 299 columns, 1349 nonzeros Variable types: 0 continuous, 299 integer (299 binary) Found heuristic solution: objective 87.0000000 Root relaxation: objective 0.000000e+00, 120 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 88 87.00000 0.00000 100% - 0s H 0 0 66.0000000 0.00000 100% - 0s 0 0 0.61429 0 89 66.00000 0.61429 99.1% - 0s 0 0 0.62857 0 90 66.00000 0.62857 99.0% - 0s 0 0 0.64773 0 90 66.00000 0.64773 99.0% - 0s 0 0 0.65714 0 91 66.00000 0.65714 99.0% - 0s 0 0 0.67143 0 90 66.00000 0.67143 99.0% - 0s 0 0 0.67143 0 90 66.00000 0.67143 99.0% - 0s 0 0 0.67351 0 93 66.00000 0.67351 99.0% - 0s H 0 0 65.0000000 0.67351 99.0% - 0s 0 2 0.73549 0 93 65.00000 0.73549 98.9% - 0s H 32 32 56.0000000 5.03571 91.0% 30.8 0s * 53 50 34 54.0000000 5.03571 90.7% 24.2 0s * 102 81 32 50.0000000 5.04592 89.9% 24.8 0s * 310 235 22 47.0000000 10.06250 78.6% 30.1 0s * 890 464 32 46.0000000 14.04225 69.5% 28.7 1s * 1027 469 32 45.0000000 16.93548 62.4% 28.4 1s * 1733 527 29 44.0000000 23.66667 46.2% 25.8 2s * 1760 498 29 42.0000000 24.03226 42.8% 25.7 2s 4353 831 31.76923 18 137 42.00000 29.66667 29.4% 22.7 5s H 4784 824 41.0000000 30.16216 26.4% 22.4 5s * 7350 650 30 40.0000000 32.50847 18.7% 21.9 7s * 8837 272 22 39.0000000 35.50000 8.97% 21.6 8s Cutting planes: Gomory: 1 Zero half: 1 Mod-K: 3 Explored 9158 nodes (196460 simplex iterations) in 9.16 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.900000000000e+01, best bound 3.900000000000e+01, gap 0.0%