Gurobi 5.0.1 (linux64) logging started Mon Feb 4 18:58:40 2013 Optimize a model with 37881 rows, 3721 columns and 115351 nonzeros Presolve removed 5946 rows and 1947 columns Presolve time: 0.25s Presolved: 31935 rows, 1774 columns, 96789 nonzeros Variable types: 17 continuous, 1757 integer (1757 binary) Found heuristic solution: objective 90077.000000 Root relaxation: objective 7.549555e+04, 6537 iterations, 0.46 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 75495.5485 0 9 90077.0000 75495.5485 16.2% - 0s H 0 0 75514.000000 75495.5485 0.02% - 0s H 0 0 75512.000000 75495.5485 0.02% - 0s 0 0 75497.5474 0 22 75512.0000 75497.5474 0.02% - 0s 0 0 75497.5474 0 8 75512.0000 75497.5474 0.02% - 1s H 0 0 75510.000000 75497.5474 0.02% - 1s 0 0 75498.5954 0 29 75510.0000 75498.5954 0.02% - 1s H 0 0 75507.000000 75498.5954 0.01% - 1s 0 2 75499.4542 0 29 75507.0000 75499.4542 0.01% - 1s Cutting planes: MIR: 10 Explored 1 nodes (7589 simplex iterations) in 1.30 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 7.550700000000e+04, best bound 7.550000000000e+04, gap 0.0093%