Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:15 2012 Optimize a model with 303 rows, 111 columns and 606 nonzeros Presolve removed 63 rows and 7 columns Presolve time: 0.00s Presolved: 240 rows, 104 columns, 506 nonzeros Variable types: 0 continuous, 104 integer (104 binary) Found heuristic solution: objective 43.0000000 Root relaxation: objective 5.050000e+01, 135 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 50.50000 0 89 43.00000 50.50000 17.4% - 0s 0 0 49.20000 0 97 43.00000 49.20000 14.4% - 0s 0 0 48.58824 0 99 43.00000 48.58824 13.0% - 0s 0 0 48.00000 0 100 43.00000 48.00000 11.6% - 0s 0 0 47.83158 0 100 43.00000 47.83158 11.2% - 0s 0 0 47.51562 0 98 43.00000 47.51562 10.5% - 0s 0 0 47.19444 0 99 43.00000 47.19444 9.75% - 0s 0 0 47.03509 0 100 43.00000 47.03509 9.38% - 0s 0 0 46.96939 0 100 43.00000 46.96939 9.23% - 0s H 0 0 44.0000000 46.96939 6.75% - 0s 0 0 46.86404 0 101 44.00000 46.86404 6.51% - 0s 0 0 46.79775 0 103 44.00000 46.79775 6.36% - 0s 0 0 46.72727 0 102 44.00000 46.72727 6.20% - 0s 0 0 46.70833 0 103 44.00000 46.70833 6.16% - 0s 0 0 46.70833 0 96 44.00000 46.70833 6.16% - 0s H 0 0 45.0000000 46.70833 3.80% - 0s 0 2 46.70833 0 96 45.00000 46.70833 3.80% - 0s Cutting planes: Zero half: 63 Explored 21 nodes (1097 simplex iterations) in 0.07 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.500000000000e+01, best bound 4.500000000000e+01, gap 0.0%