Gurobi 5.0.1 (linux64) logging started Sun Nov 18 08:06:34 2012 Optimize a model with 287 rows, 806 columns and 806 nonzeros Model has 572 quadratic constraints Presolve removed 0 rows and 19 columns Presolve time: 3.34s Presolved: 287 rows, 787 columns, 787 nonzeros Variable types: 572 continuous, 215 integer (214 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 0 149.0000000 - - - 3s 0 0 0.00000 0 4 149.00000 0.00000 100% - 3s 0 0 0.00000 0 11 149.00000 0.00000 100% - 3s 0 0 0.00000 0 130 149.00000 0.00000 100% - 3s 0 2 0.00000 0 130 149.00000 0.00000 100% - 3s H 47 47 36.0000000 2.28022 93.7% 37.0 3s * 75 62 54 32.0000000 2.28022 92.9% 32.7 3s H 108 74 29.0000000 2.44330 91.6% 31.4 3s * 108 62 25 26.0000000 2.44330 90.6% 31.6 3s * 134 76 17 24.0000000 3.36364 86.0% 31.9 3s 606 340 7.37838 11 482 24.00000 7.37838 69.3% 30.2 5s * 983 405 34 20.0000000 7.37838 63.1% 39.1 7s 1855 301 cutoff 29 20.00000 11.92000 40.4% 37.1 10s 3118 311 14.90217 28 477 20.00000 14.52381 27.4% 36.0 15s 3621 242 19.00000 30 456 20.00000 15.47429 22.6% 35.9 20s Explored 4460 nodes (160787 simplex iterations) in 23.89 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%