Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:15 2012 Optimize a model with 341 rows, 111 columns and 682 nonzeros Presolve removed 81 rows and 8 columns Presolve time: 0.00s Presolved: 260 rows, 103 columns, 557 nonzeros Variable types: 0 continuous, 103 integer (103 binary) Found heuristic solution: objective 40.0000000 Root relaxation: objective 4.900000e+01, 151 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 49.00000 0 78 40.00000 49.00000 22.5% - 0s H 0 0 41.0000000 49.00000 19.5% - 0s 0 0 47.00000 0 76 41.00000 47.00000 14.6% - 0s 0 0 47.00000 0 78 41.00000 47.00000 14.6% - 0s 0 0 47.00000 0 79 41.00000 47.00000 14.6% - 0s H 0 0 42.0000000 47.00000 11.9% - 0s H 0 0 43.0000000 47.00000 9.30% - 0s 0 0 46.85714 0 98 43.00000 46.85714 8.97% - 0s 0 0 46.50000 0 100 43.00000 46.50000 8.14% - 0s 0 0 46.20000 0 101 43.00000 46.20000 7.44% - 0s 0 0 45.84697 0 102 43.00000 45.84697 6.62% - 0s 0 0 45.68750 0 102 43.00000 45.68750 6.25% - 0s 0 0 45.50000 0 103 43.00000 45.50000 5.81% - 0s 0 0 45.36842 0 103 43.00000 45.36842 5.51% - 0s 0 0 45.34884 0 103 43.00000 45.34884 5.46% - 0s 0 0 45.34884 0 101 43.00000 45.34884 5.46% - 0s 0 2 45.34884 0 101 43.00000 45.34884 5.46% - 0s Cutting planes: Gomory: 1 Zero half: 67 Explored 31 nodes (1693 simplex iterations) in 0.09 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%