Gurobi 5.0.1 (linux64) logging started Sun Nov 18 03:43:24 2012 Optimize a model with 154 rows, 386 columns and 386 nonzeros Model has 306 quadratic constraints Presolve time: 1.79s Presolved: 154 rows, 386 columns, 386 nonzeros Variable types: 306 continuous, 80 integer (80 binary) Root relaxation: objective 0.000000e+00, 40 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time H 0 0 84.0000000 - - - 1s 0 0 0.00000 0 66 84.00000 0.00000 100% - 1s 0 0 0.48987 0 77 84.00000 0.48987 99.4% - 1s H 0 0 81.0000000 0.48987 99.4% - 1s 0 2 0.50000 0 77 81.00000 0.50000 99.4% - 1s * 37 37 23 35.0000000 3.48372 90.0% 30.9 1s * 113 61 16 27.0000000 3.92859 85.4% 29.3 1s 2572 862 17.43478 31 233 27.00000 14.80242 45.2% 24.4 5s * 7393 1788 42 26.0000000 19.11111 26.5% 19.4 9s 8204 1796 23.26866 35 224 26.00000 19.64286 24.5% 19.1 10s 10052 1638 23.43284 34 231 26.00000 20.71429 20.3% 18.5 15s Explored 14286 nodes (254774 simplex iterations) in 19.90 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.600000000000e+01, best bound 2.600000000000e+01, gap 0.0%