Gurobi 5.0.1 (linux64) logging started Sun Nov 18 05:39:58 2012 Optimize a model with 1 rows, 171 columns and 171 nonzeros Model has 150 quadratic objective terms Presolve removed 0 rows and 26 columns Presolve time: 0.00s Presolved: 151 rows, 295 columns, 595 nonzeros Variable types: 0 continuous, 295 integer (294 binary) Found heuristic solution: objective 38.0000000 Root relaxation: objective 0.000000e+00, 178 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 33 38.00000 0.00000 100% - 0s H 0 0 31.0000000 0.00000 100% - 0s 0 0 0.00000 0 22 31.00000 0.00000 100% - 0s H 0 0 19.0000000 0.00000 100% - 0s H 0 0 15.0000000 0.00000 100% - 0s 0 0 0.00000 0 13 15.00000 0.00000 100% - 0s H 0 0 13.0000000 0.00000 100% - 0s H 0 0 12.0000000 0.00000 100% - 0s H 0 0 11.0000000 0.00000 100% - 0s 0 0 0.00000 0 16 11.00000 0.00000 100% - 0s 0 0 0.00000 0 13 11.00000 0.00000 100% - 0s H 0 0 8.0000000 0.00000 100% - 0s 0 2 0.00000 0 13 8.00000 0.00000 100% - 0s H 297 152 7.0000000 0.00000 100% 5.1 0s H 460 175 5.0000000 0.00000 100% 9.7 0s H 514 95 4.0000000 1.00000 75.0% 13.2 0s Cutting planes: Cover: 275 Explored 616 nodes (13562 simplex iterations) in 0.27 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%