Gurobi 5.0.1 (linux64) logging started Fri Nov 16 01:06:17 2012 Optimize a model with 263 rows, 132 columns and 867 nonzeros Presolve removed 112 rows and 2 columns Presolve time: 0.00s Presolved: 162 rows, 130 columns, 707 nonzeros Variable types: 0 continuous, 130 integer (130 binary) Found heuristic solution: objective 11.0000000 Root relaxation: objective 3.000000e+00, 178 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 3.00000 0 16 11.00000 3.00000 72.7% - 0s H 0 0 5.0000000 3.00000 40.0% - 0s H 0 0 4.0000000 3.00000 25.0% - 0s 0 0 3.00000 0 28 4.00000 3.00000 25.0% - 0s 0 0 3.00000 0 26 4.00000 3.00000 25.0% - 0s 0 0 3.00000 0 47 4.00000 3.00000 25.0% - 0s 0 0 3.00000 0 23 4.00000 3.00000 25.0% - 0s 0 2 3.00000 0 14 4.00000 3.00000 25.0% - 0s Explored 3 nodes (1746 simplex iterations) in 0.05 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 4.000000000000e+00, best bound 4.000000000000e+00, gap 0.0%