Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:48:39 2012 Optimize a model with 166 rows, 53 columns and 332 nonzeros Presolve removed 41 rows and 0 columns Presolve time: 0.00s Presolved: 125 rows, 53 columns, 283 nonzeros Variable types: 0 continuous, 53 integer (53 binary) Found heuristic solution: objective 19.0000000 Root relaxation: objective 2.200000e+01, 75 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 22.00000 0 36 19.00000 22.00000 15.8% - 0s 0 0 21.33333 0 50 19.00000 21.33333 12.3% - 0s 0 0 21.00000 0 50 19.00000 21.00000 10.5% - 0s H 0 0 20.0000000 21.00000 5.00% - 0s 0 0 21.00000 0 34 20.00000 21.00000 5.00% - 0s 0 0 21.00000 0 52 20.00000 21.00000 5.00% - 0s 0 0 21.00000 0 26 20.00000 21.00000 5.00% - 0s 0 2 21.00000 0 26 20.00000 21.00000 5.00% - 0s Explored 3 nodes (305 simplex iterations) in 0.03 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.000000000000e+01, best bound 2.000000000000e+01, gap 0.0%