Gurobi 5.0.1 (linux64) logging started Sun Nov 18 09:55:56 2012 Optimize a model with 297 rows, 837 columns and 837 nonzeros Model has 592 quadratic constraints Presolve removed 0 rows and 21 columns Presolve time: 3.45s Presolved: 297 rows, 816 columns, 816 nonzeros Variable types: 592 continuous, 224 integer (223 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 0 137.0000000 - - - 3s 0 0 0.00000 0 7 137.00000 0.00000 100% - 3s 0 0 0.00000 0 8 137.00000 0.00000 100% - 3s 0 0 0.00000 0 7 137.00000 0.00000 100% - 3s 0 2 0.00000 0 3 137.00000 0.00000 100% - 3s * 31 30 24 30.0000000 0.83486 97.2% 86.7 3s H 212 158 29.0000000 1.86207 93.6% 36.7 3s * 224 155 37 28.0000000 1.86207 93.3% 35.4 3s * 264 165 21 27.0000000 2.90909 89.2% 34.5 4s 634 370 18.89945 26 573 27.00000 6.05000 77.6% 39.1 5s * 681 377 49 26.0000000 6.05000 76.7% 40.4 5s H 710 355 25.0000000 6.05000 75.8% 40.1 5s H 800 325 24.0000000 6.05000 74.8% 41.4 5s H 860 329 22.0000000 6.05000 72.5% 42.8 5s H 995 355 21.0000000 7.59259 63.8% 45.5 6s * 998 325 41 19.0000000 7.59259 60.0% 45.5 6s 2212 141 17.31517 30 500 19.00000 14.73958 22.4% 42.1 10s Explored 2629 nodes (109984 simplex iterations) in 11.14 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%