Gurobi 5.0.1 (linux64) logging started Sun Nov 18 10:06:44 2012 Optimize a model with 328 rows, 900 columns and 900 nonzeros Model has 654 quadratic constraints Presolve removed 0 rows and 13 columns Presolve time: 3.86s Presolved: 328 rows, 887 columns, 887 nonzeros Variable types: 654 continuous, 233 integer (232 binary) Root relaxation: objective 0.000000e+00, 83 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time H 0 0 179.0000000 - - - 3s 0 0 0.00000 0 2 179.00000 0.00000 100% - 3s 0 0 0.00000 0 148 179.00000 0.00000 100% - 3s 0 0 0.00000 0 122 179.00000 0.00000 100% - 4s 0 2 0.00000 0 9 179.00000 0.00000 100% - 4s H 47 47 34.0000000 1.00000 97.1% 62.9 4s * 77 68 54 32.0000000 1.00000 96.9% 45.1 4s H 188 130 31.0000000 2.50495 91.9% 47.0 4s 471 289 27.04545 14 176 31.00000 5.18121 83.3% 38.2 5s * 662 369 43 30.0000000 7.54545 74.8% 47.7 6s H 690 334 29.0000000 7.54545 74.0% 46.3 6s * 762 333 33 28.0000000 7.54545 73.1% 53.1 6s 901 382 27.72727 31 122 28.00000 8.33333 70.2% 62.0 12s H 932 377 27.0000000 8.33333 69.1% 63.3 13s 1481 351 cutoff 34 27.00000 15.61972 42.1% 53.5 15s 2887 154 22.76726 31 549 27.00000 20.13333 25.4% 44.2 20s Explored 3611 nodes (154337 simplex iterations) in 25.00 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.700000000000e+01, best bound 2.700000000000e+01, gap 0.0%