Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:49:05 2012 Optimize a model with 447 rows, 94 columns and 894 nonzeros Presolve removed 151 rows and 0 columns Presolve time: 0.00s Presolved: 296 rows, 94 columns, 716 nonzeros Variable types: 0 continuous, 94 integer (94 binary) Found heuristic solution: objective 25.0000000 Root relaxation: objective 3.445372e+01, 207 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 34.45372 0 92 25.00000 34.45372 37.8% - 0s H 0 0 26.0000000 34.45372 32.5% - 0s 0 0 33.92361 0 93 26.00000 33.92361 30.5% - 0s H 0 0 27.0000000 33.92361 25.6% - 0s 0 0 33.67440 0 91 27.00000 33.67440 24.7% - 0s 0 0 33.40094 0 94 27.00000 33.40094 23.7% - 0s H 0 0 28.0000000 33.40094 19.3% - 0s 0 0 33.21429 0 94 28.00000 33.21429 18.6% - 0s 0 0 33.12814 0 94 28.00000 33.12814 18.3% - 0s 0 0 33.00000 0 93 28.00000 33.00000 17.9% - 0s 0 0 32.87504 0 93 28.00000 32.87504 17.4% - 0s 0 0 32.76724 0 93 28.00000 32.76724 17.0% - 0s 0 0 32.74093 0 93 28.00000 32.74093 16.9% - 0s 0 0 32.61558 0 93 28.00000 32.61558 16.5% - 0s 0 0 32.54829 0 93 28.00000 32.54829 16.2% - 0s 0 0 32.54144 0 93 28.00000 32.54144 16.2% - 0s 0 0 32.54144 0 92 28.00000 32.54144 16.2% - 0s 0 2 32.54144 0 92 28.00000 32.54144 16.2% - 0s * 124 21 10 29.0000000 31.60780 8.99% 25.1 0s Cutting planes: Clique: 3 Zero half: 61 Explored 211 nodes (5669 simplex iterations) in 0.24 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.900000000000e+01, best bound 2.900000000000e+01, gap 0.0%