Gurobi 5.0.1 (linux64) logging started Sun Nov 18 08:05:12 2012 Optimize a model with 276 rows, 784 columns and 784 nonzeros Model has 550 quadratic constraints Presolve removed 0 rows and 22 columns Presolve time: 3.19s Presolved: 276 rows, 762 columns, 762 nonzeros Variable types: 550 continuous, 212 integer (211 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 0 126.0000000 - - - 3s 0 0 0.00000 0 121 126.00000 0.00000 100% - 3s 0 0 0.00000 0 165 126.00000 0.00000 100% - 3s 0 0 0.00000 0 159 126.00000 0.00000 100% - 3s 0 2 0.00000 0 156 126.00000 0.00000 100% - 3s H 27 27 114.0000000 2.85714 97.5% 52.6 3s H 41 41 25.0000000 2.85714 88.6% 42.1 3s H 111 81 23.0000000 2.86707 87.5% 30.4 3s * 111 67 21 22.0000000 2.86707 87.0% 30.5 3s H 238 150 21.0000000 6.39777 69.5% 31.6 3s 606 245 9.23596 13 458 21.00000 9.23596 56.0% 31.8 5s 2360 537 20.05917 36 419 21.00000 11.87472 43.5% 35.3 10s 4735 894 cutoff 33 21.00000 14.23085 32.2% 31.7 15s 7276 1054 cutoff 33 21.00000 16.00000 23.8% 29.8 20s * 7480 778 47 20.0000000 16.08333 19.6% 29.9 20s Explored 8778 nodes (266348 simplex iterations) in 22.93 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%