Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:16 2012 Optimize a model with 341 rows, 111 columns and 682 nonzeros Presolve removed 61 rows and 0 columns Presolve time: 0.00s Presolved: 280 rows, 111 columns, 598 nonzeros Variable types: 0 continuous, 111 integer (111 binary) Found heuristic solution: objective 41.0000000 Root relaxation: objective 4.800000e+01, 171 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 48.00000 0 99 41.00000 48.00000 17.1% - 0s 0 0 47.10811 0 105 41.00000 47.10811 14.9% - 0s 0 0 46.20000 0 106 41.00000 46.20000 12.7% - 0s 0 0 45.75000 0 108 41.00000 45.75000 11.6% - 0s 0 0 45.55779 0 108 41.00000 45.55779 11.1% - 0s 0 0 45.20000 0 103 41.00000 45.20000 10.2% - 0s H 0 0 42.0000000 45.20000 7.62% - 0s 0 0 45.07407 0 104 42.00000 45.07407 7.32% - 0s 0 0 45.07018 0 104 42.00000 45.07018 7.31% - 0s 0 0 45.07018 0 98 42.00000 45.07018 7.31% - 0s H 0 0 43.0000000 45.07018 4.81% - 0s 0 2 45.01064 0 98 43.00000 45.01064 4.68% - 0s Cutting planes: Gomory: 2 Zero half: 33 Explored 27 nodes (1153 simplex iterations) in 0.06 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.300000000000e+01, best bound 4.300000000000e+01, gap 0.0%