Gurobi 5.0.1 (linux64) logging started Sun Nov 18 03:10:27 2012 Optimize a model with 47 rows, 135 columns and 135 nonzeros Model has 92 quadratic constraints Presolve removed 0 rows and 1 columns Presolve time: 0.54s Presolved: 47 rows, 134 columns, 134 nonzeros Variable types: 92 continuous, 42 integer (41 binary) Root relaxation: objective 0.000000e+00, 19 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time H 0 0 18.0000000 - - - 0s 0 0 0.00000 0 2 18.00000 0.00000 100% - 0s 0 0 0.00000 0 3 18.00000 0.00000 100% - 0s 0 0 0.00000 0 2 18.00000 0.00000 100% - 0s 0 2 0.00000 0 27 18.00000 0.00000 100% - 0s * 13 13 11 8.0000000 0.48485 93.9% 26.6 0s * 19 17 14 7.0000000 0.48485 93.1% 19.8 0s * 36 21 13 6.0000000 1.00000 83.3% 15.2 0s * 46 18 8 5.0000000 1.00000 80.0% 14.7 0s * 93 15 7 4.0000000 1.56000 61.0% 13.1 0s Cutting planes: Explored 133 nodes (1990 simplex iterations) in 0.58 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.000000000000e+00, best bound 4.000000000000e+00, gap 0.0%