Gurobi 5.0.1 (linux64) logging started Sun Nov 18 09:27:27 2012 Optimize a model with 288 rows, 816 columns and 816 nonzeros Model has 574 quadratic constraints Presolve removed 0 rows and 26 columns Presolve time: 3.35s Presolved: 288 rows, 790 columns, 790 nonzeros Variable types: 574 continuous, 216 integer (215 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 0 128.0000000 - - - 3s 0 0 0.00000 0 5 128.00000 0.00000 100% - 3s 0 0 0.00000 0 2 128.00000 0.00000 100% - 3s 0 0 0.00000 0 3 128.00000 0.00000 100% - 3s 0 2 0.00000 0 2 128.00000 0.00000 100% - 3s H 48 48 24.0000000 0.00000 100% 47.2 3s * 50 50 31 23.0000000 0.00000 100% 47.7 3s H 255 183 22.0000000 3.71808 83.1% 34.7 4s * 257 174 21 21.0000000 3.71808 82.3% 34.9 4s 603 249 19.58133 13 493 21.00000 7.01067 66.6% 31.8 5s * 1843 365 40 20.0000000 12.40741 38.0% 37.5 9s 2107 390 15.77124 33 487 20.00000 13.24490 33.8% 36.4 10s 3840 112 18.50000 35 441 20.00000 17.43437 12.8% 35.2 15s Explored 3993 nodes (141181 simplex iterations) in 16.08 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.000000000000e+01, best bound 2.000000000000e+01, gap 0.0%