Gurobi 5.0.1 (linux64) logging started Sun Nov 18 06:52:31 2012 Optimize a model with 555 rows, 500 columns and 1885 nonzeros Presolve removed 0 rows and 15 columns Presolve time: 0.00s Presolved: 555 rows, 485 columns, 1870 nonzeros Variable types: 0 continuous, 485 integer (484 binary) Found heuristic solution: objective 105.0000000 Root relaxation: objective 0.000000e+00, 274 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 0 200 105.00000 0.00000 100% - 0s H 0 0 81.0000000 0.00000 100% - 0s H 0 0 79.0000000 0.00000 100% - 0s 0 0 0.42047 0 202 79.00000 0.42047 99.5% - 0s H 0 0 54.0000000 0.42047 99.2% - 0s 0 0 0.66667 0 202 54.00000 0.66667 98.8% - 0s H 0 0 46.0000000 0.66667 98.6% - 0s 0 0 0.66667 0 204 46.00000 0.66667 98.6% - 0s H 0 0 45.0000000 0.66667 98.5% - 0s 0 0 0.66667 0 202 45.00000 0.66667 98.5% - 0s 0 0 0.66667 0 202 45.00000 0.66667 98.5% - 0s 0 0 0.66667 0 202 45.00000 0.66667 98.5% - 0s 0 0 0.66667 0 202 45.00000 0.66667 98.5% - 0s 0 2 0.66667 0 202 45.00000 0.66667 98.5% - 0s H 27 27 37.0000000 1.00000 97.3% 46.3 0s H 54 45 23.0000000 1.00000 95.7% 32.0 0s * 145 81 17 19.0000000 1.50725 92.1% 37.2 0s Cutting planes: Gomory: 3 Explored 1286 nodes (52671 simplex iterations) in 2.26 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 1.900000000000e+01, best bound 1.900000000000e+01, gap 0.0%