Gurobi 5.0.1 (linux64) logging started Fri Nov 16 12:04:52 2012 Optimize a model with 17962 rows, 5112 columns and 58644 nonzeros Presolve removed 2 rows and 2 columns Presolve time: 0.62s Presolved: 17960 rows, 5110 columns, 58138 nonzeros Variable types: 0 continuous, 5110 integer (5110 binary) Found heuristic solution: objective 71.0000000 Root relaxation: objective 2.000000e+00, 3532 iterations, 0.14 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 2.00000 0 142 71.00000 2.00000 97.2% - 1s H 0 0 68.0000000 2.00000 97.1% - 1s H 0 0 5.0000000 2.00000 60.0% - 1s 0 0 2.66667 0 4530 5.00000 2.66667 46.7% - 9s 0 0 2.66667 0 4529 5.00000 2.66667 46.7% - 11s 0 0 2.66667 0 533 5.00000 2.66667 46.7% - 11s H 0 0 4.0000000 2.66667 33.3% - 14s 0 0 2.68657 0 4466 4.00000 2.68657 32.8% - 17s 0 0 2.68657 0 4471 4.00000 2.68657 32.8% - 19s 0 0 2.68657 0 4137 4.00000 2.68657 32.8% - 23s 0 0 2.68657 0 4130 4.00000 2.68657 32.8% - 26s 0 0 2.68657 0 4131 4.00000 2.68657 32.8% - 28s 0 0 2.68657 0 4143 4.00000 2.68657 32.8% - 30s 0 0 2.68657 0 4117 4.00000 2.68657 32.8% - 33s 0 0 2.68657 0 4117 4.00000 2.68657 32.8% - 35s 0 0 2.68657 0 4075 4.00000 2.68657 32.8% - 38s 0 1 3.00000 0 4075 4.00000 3.00000 25.0% - 57s Cutting planes: Clique: 299 Zero half: 7 Explored 4 nodes (88284 simplex iterations) in 57.86 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%