Gurobi 5.0.1 (linux64) logging started Sun Nov 18 05:43:12 2012 Optimize a model with 171 rows, 515 columns and 515 nonzeros Model has 340 quadratic constraints Presolve removed 0 rows and 21 columns Presolve time: 1.98s Presolved: 171 rows, 494 columns, 494 nonzeros Variable types: 340 continuous, 154 integer (153 binary) Root relaxation: objective 0.000000e+00, 61 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time H 0 0 78.0000000 - - - 1s 0 0 0.00000 0 2 78.00000 0.00000 100% - 1s 0 0 0.00000 0 57 78.00000 0.00000 100% - 1s 0 0 0.00000 0 4 78.00000 0.00000 100% - 2s 0 2 0.00000 0 59 78.00000 0.00000 100% - 2s H 27 27 14.0000000 0.80769 94.2% 38.8 2s H 52 33 13.0000000 0.86957 93.3% 30.6 2s * 52 23 11 10.0000000 0.86957 91.3% 30.7 2s * 118 43 12 9.0000000 1.95775 78.2% 21.1 2s * 142 38 17 8.0000000 2.44444 69.4% 20.6 2s H 201 64 8.0000000 2.95238 63.1% 18.5 2s * 304 36 10 7.0000000 4.14286 40.8% 19.2 2s Cutting planes: Explored 417 nodes (8921 simplex iterations) in 2.32 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 7.000000000000e+00, best bound 7.000000000000e+00, gap 0.0%