Gurobi 5.0.1 (linux64) logging started Sun Nov 18 03:43:57 2012 Optimize a model with 177 rows, 432 columns and 432 nonzeros Model has 352 quadratic constraints Presolve time: 2.05s Presolved: 177 rows, 432 columns, 432 nonzeros Variable types: 352 continuous, 80 integer (80 binary) Root relaxation: objective 0.000000e+00, 40 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time H 0 0 86.0000000 - - - 2s 0 0 0.00000 0 34 86.00000 0.00000 100% - 2s 0 0 0.00000 0 2 86.00000 0.00000 100% - 2s 0 0 0.00000 0 75 86.00000 0.00000 100% - 2s 0 2 0.00000 0 75 86.00000 0.00000 100% - 2s H 54 54 62.0000000 5.50000 91.1% 38.2 2s * 64 61 36 39.0000000 5.50000 85.9% 34.4 2s H 99 84 36.0000000 5.64103 84.3% 32.4 2s H 178 122 34.0000000 5.88462 82.7% 32.6 2s * 298 180 15 33.0000000 6.61842 79.9% 35.5 2s * 1145 408 43 32.0000000 15.43902 51.8% 36.2 4s 1738 495 29.64516 40 248 32.00000 17.90909 44.0% 30.6 5s H 3220 808 31.0000000 21.27660 31.4% 24.4 6s 5141 930 29.66851 35 243 31.00000 23.78947 23.3% 21.7 10s 8277 540 29.35088 40 224 31.00000 26.66667 14.0% 19.9 15s Explored 9449 nodes (185010 simplex iterations) in 17.14 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.100000000000e+01, best bound 3.100000000000e+01, gap 0.0%