Gurobi 5.0.1 (linux64) logging started Sat Nov 17 01:31:36 2012 Optimize a model with 49861 rows, 46010 columns and 194524 nonzeros Presolve removed 673 rows and 6208 columns Presolve time: 1.35s Presolved: 49188 rows, 39802 columns, 186360 nonzeros Variable types: 0 continuous, 39802 integer (39802 binary) Found heuristic solution: objective 214.0000000 Found heuristic solution: objective 3.0000000 Root relaxation: infeasible, 356 iterations, 0.03 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 infeasible 0 3.00000 2.00000 33.3% - 1s Explored 0 nodes (356 simplex iterations) in 1.50 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.000000000000e+00, best bound 3.000000000000e+00, gap 0.0%