Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:48:40 2012 Optimize a model with 193 rows, 60 columns and 386 nonzeros Presolve removed 59 rows and 1 columns Presolve time: 0.00s Presolved: 134 rows, 59 columns, 314 nonzeros Variable types: 0 continuous, 59 integer (59 binary) Found heuristic solution: objective 22.0000000 Root relaxation: objective 2.504762e+01, 88 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 25.04762 0 57 22.00000 25.04762 13.9% - 0s 0 0 24.22581 0 56 22.00000 24.22581 10.1% - 0s 0 0 23.96774 0 56 22.00000 23.96774 8.94% - 0s 0 0 23.80682 0 59 22.00000 23.80682 8.21% - 0s 0 0 23.63871 0 57 22.00000 23.63871 7.45% - 0s 0 0 23.55460 0 57 22.00000 23.55460 7.07% - 0s 0 0 23.51546 0 58 22.00000 23.51546 6.89% - 0s 0 0 23.46465 0 56 22.00000 23.46465 6.66% - 0s 0 0 23.44937 0 57 22.00000 23.44937 6.59% - 0s 0 0 23.44937 0 57 22.00000 23.44937 6.59% - 0s 0 2 23.44937 0 57 22.00000 23.44937 6.59% - 0s Cutting planes: Zero half: 21 Explored 10 nodes (465 simplex iterations) in 0.04 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 2.200000000000e+01, best bound 2.200000000000e+01, gap 0.0%