Gurobi 5.0.1 (linux64) logging started Sun Nov 18 06:47:30 2012 Optimize a model with 270 rows, 759 columns and 759 nonzeros Model has 538 quadratic constraints Presolve removed 0 rows and 14 columns Presolve time: 3.14s Presolved: 270 rows, 745 columns, 745 nonzeros Variable types: 538 continuous, 207 integer (206 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 0 138.0000000 - - - 3s 0 0 0.00000 0 8 138.00000 0.00000 100% - 3s 0 0 0.00000 0 2 138.00000 0.00000 100% - 3s 0 0 0.00000 0 2 138.00000 0.00000 100% - 3s 0 2 0.00000 0 2 138.00000 0.00000 100% - 3s H 42 42 33.0000000 1.21708 96.3% 52.6 3s * 42 40 29 29.0000000 1.21708 95.8% 52.7 3s H 88 61 24.0000000 1.29687 94.6% 42.0 3s H 158 106 23.0000000 2.20000 90.4% 39.7 3s * 220 133 35 22.0000000 2.25000 89.8% 33.4 3s H 343 173 21.0000000 5.03077 76.0% 32.9 3s 606 281 8.25000 12 460 21.00000 8.25000 60.7% 35.4 5s * 741 326 39 20.0000000 8.25000 58.8% 44.0 6s H 1112 351 19.0000000 9.00000 52.6% 41.6 6s * 1375 284 40 18.0000000 10.55556 41.4% 39.7 7s 2495 225 cutoff 31 18.00000 13.62992 24.3% 34.5 10s 3305 5 16.87135 31 370 18.00000 16.84314 6.43% 33.0 15s Explored 3312 nodes (111216 simplex iterations) in 15.08 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.800000000000e+01, best bound 1.800000000000e+01, gap 0.0%