Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:22 2012 Optimize a model with 383 rows, 118 columns and 766 nonzeros Presolve removed 91 rows and 3 columns Presolve time: 0.00s Presolved: 292 rows, 115 columns, 628 nonzeros Variable types: 0 continuous, 115 integer (115 binary) Found heuristic solution: objective 42.0000000 Root relaxation: objective 5.004762e+01, 172 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 50.04762 0 109 42.00000 50.04762 19.2% - 0s H 0 0 44.0000000 50.04762 13.7% - 0s 0 0 49.09091 0 109 44.00000 49.09091 11.6% - 0s H 0 0 45.0000000 49.09091 9.09% - 0s 0 0 48.54545 0 108 45.00000 48.54545 7.88% - 0s 0 0 48.26923 0 113 45.00000 48.26923 7.26% - 0s 0 0 48.06619 0 113 45.00000 48.06619 6.81% - 0s 0 0 47.91241 0 114 45.00000 47.91241 6.47% - 0s 0 0 47.86047 0 114 45.00000 47.86047 6.36% - 0s H 0 0 46.0000000 47.86047 4.04% - 0s 0 0 47.80808 0 114 46.00000 47.80808 3.93% - 0s 0 0 47.78609 0 115 46.00000 47.78609 3.88% - 0s 0 0 47.78609 0 114 46.00000 47.78609 3.88% - 0s 0 2 47.78609 0 114 46.00000 47.78609 3.88% - 0s Cutting planes: Zero half: 32 Explored 13 nodes (862 simplex iterations) in 0.07 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.600000000000e+01, best bound 4.600000000000e+01, gap 0.0%