Gurobi 5.0.1 (linux64) logging started Tue Nov 20 06:27:11 2012 Optimize a model with 930 rows, 139 columns and 1860 nonzeros Presolve removed 353 rows and 0 columns Presolve time: 0.01s Presolved: 577 rows, 139 columns, 1495 nonzeros Variable types: 0 continuous, 139 integer (139 binary) Found heuristic solution: objective 32.0000000 Root relaxation: objective 4.753333e+01, 421 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 47.53333 0 138 32.00000 47.53333 48.5% - 0s H 0 0 35.0000000 47.53333 35.8% - 0s 0 0 46.95099 0 139 35.00000 46.95099 34.1% - 0s H 0 0 36.0000000 46.95099 30.4% - 0s 0 0 46.61000 0 138 36.00000 46.61000 29.5% - 0s 0 0 46.53578 0 138 36.00000 46.53578 29.3% - 0s 0 0 46.43131 0 139 36.00000 46.43131 29.0% - 0s 0 0 46.38953 0 139 36.00000 46.38953 28.9% - 0s 0 0 46.32885 0 138 36.00000 46.32885 28.7% - 0s 0 0 46.26814 0 138 36.00000 46.26814 28.5% - 0s 0 0 46.21865 0 139 36.00000 46.21865 28.4% - 0s 0 0 45.95422 0 139 36.00000 45.95422 27.7% - 0s 0 0 45.88450 0 139 36.00000 45.88450 27.5% - 0s 0 0 45.86336 0 139 36.00000 45.86336 27.4% - 0s 0 0 45.77005 0 139 36.00000 45.77005 27.1% - 0s 0 0 45.72889 0 137 36.00000 45.72889 27.0% - 0s 0 0 45.65395 0 138 36.00000 45.65395 26.8% - 0s 0 0 45.59902 0 138 36.00000 45.59902 26.7% - 0s 0 0 45.55891 0 138 36.00000 45.55891 26.6% - 0s H 0 0 37.0000000 45.55891 23.1% - 0s 0 0 45.54326 0 138 37.00000 45.54326 23.1% - 0s 0 0 45.54326 0 138 37.00000 45.54326 23.1% - 0s 0 2 45.54318 0 138 37.00000 45.54318 23.1% - 0s 612 200 40.42568 12 138 37.00000 42.60951 15.2% 41.1 5s 625 211 42.60951 11 123 37.00000 42.60951 15.2% 43.8 10s 3574 535 38.67532 21 89 37.00000 39.73288 7.39% 33.5 15s Cutting planes: Gomory: 1 Clique: 3 Zero half: 59 Explored 4850 nodes (149212 simplex iterations) in 16.28 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.700000000000e+01, best bound 3.700000000000e+01, gap 0.0%