Gurobi 5.0.1 (linux64) logging started Sun Nov 18 03:25:22 2012 Optimize a model with 160 rows, 391 columns and 391 nonzeros Model has 318 quadratic constraints Presolve removed 0 rows and 1 columns Presolve time: 1.86s Presolved: 160 rows, 390 columns, 390 nonzeros Variable types: 318 continuous, 72 integer (71 binary) Root relaxation: objective 0.000000e+00, 35 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time H 0 0 86.0000000 - - - 1s 0 0 0.00000 0 4 86.00000 0.00000 100% - 1s 0 0 0.00000 0 6 86.00000 0.00000 100% - 1s 0 0 0.00000 0 54 86.00000 0.00000 100% - 1s 0 2 0.00000 0 54 86.00000 0.00000 100% - 1s H 42 42 40.0000000 7.07143 82.3% 32.1 1s * 55 54 34 39.0000000 7.07143 81.9% 27.8 1s * 99 84 28 38.0000000 7.47826 80.3% 27.6 1s * 232 155 17 36.0000000 7.61538 78.8% 28.5 2s * 560 235 21 33.0000000 13.50000 59.1% 28.4 2s * 1324 412 51 32.0000000 16.48000 48.5% 31.9 4s 2156 477 30.28571 38 221 32.00000 20.00000 37.5% 27.2 5s 5293 809 28.78571 39 218 32.00000 24.55556 23.3% 20.8 10s 8805 278 30.00000 41 219 32.00000 28.21739 11.8% 18.9 15s Explored 9340 nodes (174073 simplex iterations) in 16.43 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.200000000000e+01, best bound 3.200000000000e+01, gap 0.0%