Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:10 2012 Optimize a model with 235 rows, 101 columns and 470 nonzeros Presolve removed 37 rows and 6 columns Presolve time: 0.00s Presolved: 198 rows, 95 columns, 408 nonzeros Variable types: 0 continuous, 95 integer (95 binary) Found heuristic solution: objective 40.0000000 Root relaxation: objective 4.750000e+01, 132 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 47.50000 0 71 40.00000 47.50000 18.8% - 0s H 0 0 42.0000000 47.50000 13.1% - 0s 0 0 46.80000 0 94 42.00000 46.80000 11.4% - 0s H 0 0 43.0000000 46.80000 8.84% - 0s 0 0 46.25714 0 95 43.00000 46.25714 7.57% - 0s H 0 0 44.0000000 46.25714 5.13% - 0s 0 0 45.94737 0 95 44.00000 45.94737 4.43% - 0s 0 0 45.76190 0 94 44.00000 45.76190 4.00% - 0s 0 0 45.71429 0 93 44.00000 45.71429 3.90% - 0s 0 0 45.54839 0 95 44.00000 45.54839 3.52% - 0s 0 0 45.51282 0 95 44.00000 45.51282 3.44% - 0s 0 0 45.41573 0 95 44.00000 45.41573 3.22% - 0s 0 0 45.31579 0 94 44.00000 45.31579 2.99% - 0s 0 0 45.26667 0 94 44.00000 45.26667 2.88% - 0s 0 0 45.24476 0 95 44.00000 45.24476 2.83% - 0s 0 0 45.24476 0 95 44.00000 45.24476 2.83% - 0s 0 2 45.23292 0 95 44.00000 45.23292 2.80% - 0s Cutting planes: Zero half: 34 Explored 3 nodes (505 simplex iterations) in 0.04 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.400000000000e+01, best bound 4.400000000000e+01, gap 0.0%