Gurobi 5.0.1 (linux64) logging started Sun Nov 18 05:26:00 2012 Optimize a model with 1 rows, 148 columns and 148 nonzeros Model has 120 quadratic objective terms Presolve removed 0 rows and 27 columns Presolve time: 0.00s Presolved: 121 rows, 241 columns, 481 nonzeros Variable types: 0 continuous, 241 integer (240 binary) Found heuristic solution: objective 31.0000000 Root relaxation: objective 0.000000e+00, 148 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 22 31.00000 0.00000 100% - 0s H 0 0 20.0000000 0.00000 100% - 0s 0 0 0.00000 0 19 20.00000 0.00000 100% - 0s H 0 0 16.0000000 0.00000 100% - 0s H 0 0 15.0000000 0.00000 100% - 0s 0 0 0.00000 0 19 15.00000 0.00000 100% - 0s 0 0 0.00000 0 18 15.00000 0.00000 100% - 0s 0 0 0.00000 0 12 15.00000 0.00000 100% - 0s H 0 0 11.0000000 0.00000 100% - 0s 0 0 0.00000 0 11 11.00000 0.00000 100% - 0s H 0 0 10.0000000 0.00000 100% - 0s 0 0 0.00000 0 13 10.00000 0.00000 100% - 0s 0 0 0.00000 0 13 10.00000 0.00000 100% - 0s H 0 0 9.0000000 0.00000 100% - 0s 0 2 0.00000 0 13 9.00000 0.00000 100% - 0s H 27 21 7.0000000 0.00000 100% 2.3 0s H 81 41 6.0000000 0.00000 100% 3.1 0s H 88 45 5.0000000 0.00000 100% 3.3 0s H 278 64 3.0000000 0.00000 100% 6.1 0s * 281 35 6 2.0000000 0.00000 100% 6.1 0s * 352 1 14 1.0000000 1.00000 0.0% 7.8 0s Cutting planes: Cover: 186 Explored 353 nodes (3142 simplex iterations) in 0.09 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.000000000000e+00, best bound 1.000000000000e+00, gap 0.0%