Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:49:04 2012 Optimize a model with 409 rows, 93 columns and 818 nonzeros Presolve removed 131 rows and 0 columns Presolve time: 0.00s Presolved: 278 rows, 93 columns, 660 nonzeros Variable types: 0 continuous, 93 integer (93 binary) Found heuristic solution: objective 27.0000000 Root relaxation: objective 3.520851e+01, 169 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 35.20851 0 91 27.00000 35.20851 30.4% - 0s H 0 0 28.0000000 35.20851 25.7% - 0s 0 0 34.66742 0 91 28.00000 34.66742 23.8% - 0s H 0 0 29.0000000 34.66742 19.5% - 0s 0 0 34.44422 0 91 29.00000 34.44422 18.8% - 0s 0 0 34.06577 0 90 29.00000 34.06577 17.5% - 0s 0 0 33.92229 0 91 29.00000 33.92229 17.0% - 0s 0 0 33.83737 0 92 29.00000 33.83737 16.7% - 0s 0 0 33.66375 0 91 29.00000 33.66375 16.1% - 0s 0 0 33.55521 0 91 29.00000 33.55521 15.7% - 0s 0 0 33.50700 0 90 29.00000 33.50700 15.5% - 0s 0 0 33.47140 0 92 29.00000 33.47140 15.4% - 0s 0 0 33.45262 0 91 29.00000 33.45262 15.4% - 0s 0 0 33.43435 0 92 29.00000 33.43435 15.3% - 0s 0 0 33.43435 0 91 29.00000 33.43435 15.3% - 0s 0 2 33.42377 0 91 29.00000 33.42377 15.3% - 0s H 109 18 30.0000000 32.66216 8.87% 23.5 0s * 112 12 10 31.0000000 32.66216 5.36% 23.8 0s Cutting planes: Clique: 1 Zero half: 62 Explored 125 nodes (3494 simplex iterations) in 0.16 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.100000000000e+01, best bound 3.100000000000e+01, gap 0.0%