Gurobi 5.0.1 (linux64) logging started Tue Nov 20 12:32:25 2012 Optimize a model with 370 rows, 121 columns and 740 nonzeros Presolve removed 62 rows and 2 columns Presolve time: 0.00s Presolved: 308 rows, 119 columns, 651 nonzeros Variable types: 0 continuous, 119 integer (119 binary) Found heuristic solution: objective 43.0000000 Root relaxation: objective 5.250000e+01, 165 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 52.50000 0 93 43.00000 52.50000 22.1% - 0s 0 0 52.00000 0 92 43.00000 52.00000 20.9% - 0s 0 0 51.50000 0 97 43.00000 51.50000 19.8% - 0s 0 0 51.00000 0 108 43.00000 51.00000 18.6% - 0s H 0 0 46.0000000 51.00000 10.9% - 0s H 0 0 47.0000000 51.00000 8.51% - 0s 0 0 50.50000 0 96 47.00000 50.50000 7.45% - 0s 0 0 50.40000 0 110 47.00000 50.40000 7.23% - 0s 0 0 50.00000 0 111 47.00000 50.00000 6.38% - 0s 0 0 49.83333 0 107 47.00000 49.83333 6.03% - 0s 0 0 49.54651 0 118 47.00000 49.54651 5.42% - 0s 0 0 49.33846 0 116 47.00000 49.33846 4.98% - 0s 0 0 49.25000 0 112 47.00000 49.25000 4.79% - 0s 0 0 49.13433 0 117 47.00000 49.13433 4.54% - 0s 0 0 49.06837 0 118 47.00000 49.06837 4.40% - 0s 0 0 49.04192 0 118 47.00000 49.04192 4.34% - 0s 0 0 49.04192 0 116 47.00000 49.04192 4.34% - 0s 0 2 49.00998 0 116 47.00000 49.00998 4.28% - 0s Cutting planes: Gomory: 1 Zero half: 37 Explored 19 nodes (1515 simplex iterations) in 0.09 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.700000000000e+01, best bound 4.700000000000e+01, gap 0.0%