Gurobi 5.0.1 (linux64) logging started Sat Dec 8 02:35:12 2012 Optimize a model with 285 rows, 270 columns and 890 nonzeros Presolve removed 20 rows and 12 columns Presolve time: 0.00s Presolved: 265 rows, 258 columns, 842 nonzeros Variable types: 172 continuous, 86 integer (86 binary) Root relaxation: objective 2.677705e+04, 138 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 26777.0523 0 53 - 26777.0523 - - 0s H 0 0 43400.000000 26777.0523 38.3% - 0s 0 0 32346.0841 0 19 43400.0000 32346.0841 25.5% - 0s 0 0 32743.4884 0 7 43400.0000 32743.4884 24.6% - 0s 0 0 32793.1185 0 3 43400.0000 32793.1185 24.4% - 0s 0 0 32824.3978 0 7 43400.0000 32824.3978 24.4% - 0s H 0 0 33175.000000 32824.3978 1.06% - 0s 0 2 32842.8569 0 7 33175.0000 32842.8569 1.00% - 0s * 11 9 10 33119.000000 32861.6255 0.78% 2.6 0s * 24 13 10 33116.000000 32874.9111 0.73% 2.5 0s * 37 20 10 33024.000000 32876.3862 0.45% 2.3 0s * 41 1 3 32886.000000 32883.0000 0.01% 2.3 0s Cutting planes: Gomory: 4 Flow cover: 38 Flow path: 15 Explored 42 nodes (311 simplex iterations) in 0.02 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.288600000000e+04, best bound 3.288300000000e+04, gap 0.0091%