Gurobi 5.0.1 (linux64) logging started Sun Nov 18 06:37:05 2012 Optimize a model with 491 rows, 464 columns and 1689 nonzeros Presolve removed 0 rows and 23 columns Presolve time: 0.00s Presolved: 491 rows, 441 columns, 1666 nonzeros Variable types: 0 continuous, 441 integer (440 binary) Found heuristic solution: objective 94.0000000 Root relaxation: objective 0.000000e+00, 282 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 191 94.00000 0.00000 100% - 0s H 0 0 74.0000000 0.00000 100% - 0s H 0 0 51.0000000 0.00000 100% - 0s 0 0 0.46366 0 192 51.00000 0.46366 99.1% - 0s H 0 0 39.0000000 0.46366 98.8% - 0s 0 0 1.06975 0 193 39.00000 1.06975 97.3% - 0s H 0 0 28.0000000 1.06975 96.2% - 0s 0 0 1.16996 0 200 28.00000 1.16996 95.8% - 0s 0 0 1.17005 0 200 28.00000 1.17005 95.8% - 0s 0 0 1.17005 0 199 28.00000 1.17005 95.8% - 0s 0 2 1.18547 0 199 28.00000 1.18547 95.8% - 0s H 27 27 25.0000000 1.34762 94.6% 50.7 0s H 54 37 16.0000000 1.34762 91.6% 29.8 0s * 641 264 31 15.0000000 5.93760 60.4% 37.0 1s * 1355 242 32 14.0000000 9.04054 35.4% 28.5 1s Explored 2363 nodes (59360 simplex iterations) in 3.08 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.400000000000e+01, best bound 1.400000000000e+01, gap 0.0%