Gurobi 5.0.1 (linux64) logging started Sun Nov 18 07:42:29 2012 Optimize a model with 270 rows, 769 columns and 769 nonzeros Model has 538 quadratic constraints Presolve removed 0 rows and 24 columns Presolve time: 3.13s 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 0 114.0000000 - - - 3s 0 0 0.00000 0 134 114.00000 0.00000 100% - 3s 0 0 0.00000 0 134 114.00000 0.00000 100% - 3s 0 0 0.00000 0 85 114.00000 0.00000 100% - 3s 0 2 0.00000 0 85 114.00000 0.00000 100% - 3s H 54 54 21.0000000 1.57576 92.5% 42.0 3s * 71 57 39 19.0000000 1.57576 91.7% 37.7 3s 607 321 7.57576 15 700 19.00000 7.57576 60.1% 33.6 5s 2486 675 15.86429 35 437 19.00000 10.96888 42.3% 34.4 10s 5040 1253 17.69737 36 413 19.00000 13.09375 31.1% 30.3 15s 7587 1422 18.11832 36 342 19.00000 14.30769 24.7% 29.8 20s 10219 1409 17.56053 33 453 19.00000 15.11539 20.4% 29.3 25s 13054 1205 cutoff 36 19.00000 15.97403 15.9% 28.1 30s 16011 758 cutoff 40 19.00000 16.90382 11.0% 27.3 35s Explored 18337 nodes (480149 simplex iterations) in 38.15 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.900000000000e+01, best bound 1.900000000000e+01, gap 0.0%