Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:49:19 2012 Optimize a model with 516 rows, 101 columns and 1032 nonzeros Presolve removed 180 rows and 0 columns Presolve time: 0.00s Presolved: 336 rows, 101 columns, 829 nonzeros Variable types: 0 continuous, 101 integer (101 binary) Found heuristic solution: objective 29.0000000 Root relaxation: objective 3.652273e+01, 266 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 36.52273 0 98 29.00000 36.52273 25.9% - 0s 0 0 35.80771 0 100 29.00000 35.80771 23.5% - 0s 0 0 35.60619 0 99 29.00000 35.60619 22.8% - 0s 0 0 35.37663 0 100 29.00000 35.37663 22.0% - 0s 0 0 35.16096 0 101 29.00000 35.16096 21.2% - 0s 0 0 35.03353 0 100 29.00000 35.03353 20.8% - 0s 0 0 34.95247 0 100 29.00000 34.95247 20.5% - 0s H 0 0 30.0000000 34.95247 16.5% - 0s 0 0 34.90388 0 100 30.00000 34.90388 16.3% - 0s 0 0 34.86874 0 101 30.00000 34.86874 16.2% - 0s 0 0 34.81734 0 101 30.00000 34.81734 16.1% - 0s 0 0 34.79704 0 101 30.00000 34.79704 16.0% - 0s 0 0 34.79239 0 100 30.00000 34.79239 16.0% - 0s 0 0 34.75236 0 100 30.00000 34.75236 15.8% - 0s 0 0 34.74787 0 100 30.00000 34.74787 15.8% - 0s 0 0 34.74787 0 100 30.00000 34.74787 15.8% - 0s 0 2 34.74426 0 100 30.00000 34.74426 15.8% - 0s * 176 16 11 31.0000000 32.93333 6.24% 29.3 0s Cutting planes: Zero half: 57 Explored 206 nodes (6493 simplex iterations) in 0.29 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%