Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:15 2012 Optimize a model with 292 rows, 110 columns and 584 nonzeros Presolve removed 56 rows and 7 columns Presolve time: 0.00s Presolved: 236 rows, 103 columns, 494 nonzeros Variable types: 0 continuous, 103 integer (103 binary) Found heuristic solution: objective 39.0000000 Root relaxation: objective 4.900000e+01, 131 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 84 39.00000 49.00000 25.6% - 0s 0 0 48.00000 0 86 39.00000 48.00000 23.1% - 0s 0 0 47.80000 0 101 39.00000 47.80000 22.6% - 0s H 0 0 42.0000000 47.80000 13.8% - 0s 0 0 47.11111 0 100 42.00000 47.11111 12.2% - 0s 0 0 46.68116 0 102 42.00000 46.68116 11.1% - 0s H 0 0 43.0000000 46.68116 8.56% - 0s 0 0 46.31250 0 101 43.00000 46.31250 7.70% - 0s 0 0 46.15455 0 101 43.00000 46.15455 7.34% - 0s 0 0 46.02088 0 102 43.00000 46.02088 7.03% - 0s 0 0 45.88235 0 97 43.00000 45.88235 6.70% - 0s 0 0 45.81698 0 101 43.00000 45.81698 6.55% - 0s H 0 0 44.0000000 45.81698 4.13% - 0s 0 0 45.78261 0 102 44.00000 45.78261 4.05% - 0s 0 0 45.78261 0 101 44.00000 45.78261 4.05% - 0s 0 2 45.78261 0 100 44.00000 45.78261 4.05% - 0s Cutting planes: Zero half: 63 Explored 30 nodes (1309 simplex iterations) in 0.07 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%