Gurobi 5.0.1 (linux64) logging started Sun Nov 18 02:25:46 2012 Optimize a model with 385 rows, 256 columns and 1216 nonzeros Presolve time: 0.00s Presolved: 385 rows, 256 columns, 1216 nonzeros Variable types: 0 continuous, 256 integer (256 binary) Found heuristic solution: objective 84.0000000 Root relaxation: objective 0.000000e+00, 89 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 64 84.00000 0.00000 100% - 0s H 0 0 81.0000000 0.00000 100% - 0s 0 0 0.72000 0 66 81.00000 0.72000 99.1% - 0s H 0 0 77.0000000 0.72000 99.1% - 0s 0 0 0.86000 0 66 77.00000 0.86000 98.9% - 0s 0 0 0.90000 0 66 77.00000 0.90000 98.8% - 0s 0 0 0.92000 0 68 77.00000 0.92000 98.8% - 0s 0 0 0.98000 0 66 77.00000 0.98000 98.7% - 0s 0 0 0.98086 0 72 77.00000 0.98086 98.7% - 0s 0 2 1.00923 0 72 77.00000 1.00923 98.7% - 0s H 32 32 69.0000000 3.84000 94.4% 35.2 0s * 54 49 32 62.0000000 3.84000 93.8% 26.9 0s * 102 80 25 61.0000000 3.88741 93.6% 27.5 0s * 148 116 30 59.0000000 6.12000 89.6% 26.0 0s * 230 176 25 58.0000000 6.30207 89.1% 26.0 0s * 309 238 28 55.0000000 9.00000 83.6% 25.8 0s * 401 295 23 54.0000000 11.11158 79.4% 25.0 0s H 649 409 52.0000000 13.12435 74.8% 24.9 0s * 884 473 35 51.0000000 13.12435 74.3% 25.4 1s H 2449 785 50.0000000 23.12121 53.8% 22.5 2s 5271 1503 30.14815 19 106 50.00000 27.62500 44.8% 21.2 5s H 8373 2079 49.0000000 30.13953 38.5% 20.8 7s 11810 2567 44.17949 26 109 49.00000 32.05882 34.6% 20.3 10s 19731 3238 43.04000 23 124 49.00000 35.38462 27.8% 19.3 15s *26613 3207 31 48.0000000 37.08696 22.7% 18.9 19s 27598 3150 cutoff 27 48.00000 37.33333 22.2% 18.9 20s 36075 2258 cutoff 27 48.00000 39.96552 16.7% 18.7 25s Cutting planes: Gomory: 1 Mod-K: 4 Explored 45056 nodes (822794 simplex iterations) in 29.96 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.800000000000e+01, best bound 4.800000000000e+01, gap 0.0%