Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:57:20 2012 Optimize a model with 769 rows, 123 columns and 1538 nonzeros Presolve removed 303 rows and 1 columns Presolve time: 0.01s Presolved: 466 rows, 122 columns, 1195 nonzeros Variable types: 0 continuous, 122 integer (122 binary) Found heuristic solution: objective 30.0000000 Root relaxation: objective 4.127614e+01, 269 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 41.27614 0 119 30.00000 41.27614 37.6% - 0s 0 0 40.80700 0 119 30.00000 40.80700 36.0% - 0s 0 0 40.64093 0 115 30.00000 40.64093 35.5% - 0s 0 0 40.47628 0 118 30.00000 40.47628 34.9% - 0s H 0 0 32.0000000 40.47628 26.5% - 0s 0 0 40.22191 0 117 32.00000 40.22191 25.7% - 0s 0 0 39.94745 0 119 32.00000 39.94745 24.8% - 0s 0 0 39.82869 0 121 32.00000 39.82869 24.5% - 0s 0 0 39.74753 0 121 32.00000 39.74753 24.2% - 0s 0 0 39.70328 0 121 32.00000 39.70328 24.1% - 0s 0 0 39.59449 0 119 32.00000 39.59449 23.7% - 0s 0 0 39.54233 0 120 32.00000 39.54233 23.6% - 0s 0 0 39.53377 0 120 32.00000 39.53377 23.5% - 0s 0 2 39.53335 0 120 32.00000 39.53335 23.5% - 0s * 20 14 14 33.0000000 39.30329 19.1% 42.8 0s H 253 53 34.0000000 38.01429 11.8% 34.0 0s Cutting planes: Clique: 7 Zero half: 49 Explored 765 nodes (25596 simplex iterations) in 1.01 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.400000000000e+01, best bound 3.400000000000e+01, gap 0.0%