Gurobi 5.0.1 (linux64) logging started Tue Nov 20 05:58:42 2012 Optimize a model with 745 rows, 124 columns and 1490 nonzeros Presolve removed 278 rows and 0 columns Presolve time: 0.00s Presolved: 467 rows, 124 columns, 1180 nonzeros Variable types: 0 continuous, 124 integer (124 binary) Found heuristic solution: objective 29.0000000 Root relaxation: objective 4.255756e+01, 333 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 42.55756 0 120 29.00000 42.55756 46.8% - 0s H 0 0 31.0000000 42.55756 37.3% - 0s 0 0 42.17310 0 124 31.00000 42.17310 36.0% - 0s 0 0 42.05699 0 124 31.00000 42.05699 35.7% - 0s 0 0 41.97699 0 124 31.00000 41.97699 35.4% - 0s H 0 0 32.0000000 41.97699 31.2% - 0s 0 0 41.84189 0 122 32.00000 41.84189 30.8% - 0s H 0 0 34.0000000 41.84189 23.1% - 0s 0 0 41.70826 0 122 34.00000 41.70826 22.7% - 0s 0 0 41.50213 0 122 34.00000 41.50213 22.1% - 0s 0 0 41.41284 0 122 34.00000 41.41284 21.8% - 0s 0 0 41.35929 0 121 34.00000 41.35929 21.6% - 0s 0 0 41.30820 0 124 34.00000 41.30820 21.5% - 0s 0 0 41.27322 0 123 34.00000 41.27322 21.4% - 0s 0 0 41.27201 0 123 34.00000 41.27201 21.4% - 0s 0 0 41.27201 0 123 34.00000 41.27201 21.4% - 0s 0 2 41.25186 0 123 34.00000 41.25186 21.3% - 0s H 81 32 35.0000000 40.44201 15.5% 43.2 0s Cutting planes: Clique: 3 Zero half: 37 Explored 865 nodes (27662 simplex iterations) in 1.06 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.500000000000e+01, best bound 3.500000000000e+01, gap 0.0%