current bounds on the number of colors: 0 -- 133 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:35:52 2012 Optimize a model with 30823 rows, 9243 columns and 100848 nonzeros Presolve time: 0.14s Presolved: 30823 rows, 9243 columns, 100848 nonzeros Variable types: 0 continuous, 9243 integer (9243 binary) Root relaxation: objective 0.000000e+00, 459 iterations, 0.03 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (745 simplex iterations) in 0.22 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 0.000000000000e+00, best bound 0.000000000000e+00, gap 0.0% current bounds on the number of colors: 0 -- 66 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:35:52 2012 Optimize a model with 15478 rows, 4854 columns and 50424 nonzeros Presolve time: 0.08s Presolved: 15478 rows, 4854 columns, 50424 nonzeros Variable types: 0 continuous, 4854 integer (4854 binary) Root relaxation: objective 0.000000e+00, 320 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (564 simplex iterations) in 0.11 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 0.000000000000e+00, best bound 0.000000000000e+00, gap 0.0% current bounds on the number of colors: 0 -- 33 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:35:53 2012 Optimize a model with 7573 rows, 2593 columns and 24448 nonzeros Presolve time: 0.03s Presolved: 7573 rows, 2593 columns, 24448 nonzeros Variable types: 0 continuous, 2593 integer (2593 binary) 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 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (500 simplex iterations) in 0.04 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 0.000000000000e+00, best bound 0.000000000000e+00, gap 0.0% current bounds on the number of colors: 0 -- 16 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:35:53 2012 Optimize a model with 3853 rows, 1529 columns and 12224 nonzeros Presolve time: 0.01s Presolved: 3853 rows, 1529 columns, 12224 nonzeros Variable types: 0 continuous, 1529 integer (1529 binary) Root relaxation: objective 0.000000e+00, 289 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (529 simplex iterations) in 0.02 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 0.000000000000e+00, best bound 0.000000000000e+00, gap 0.0% current bounds on the number of colors: 0 -- 8 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:35:53 2012 Optimize a model with 1993 rows, 997 columns and 6112 nonzeros Presolve time: 0.01s Presolved: 1993 rows, 997 columns, 6112 nonzeros Variable types: 0 continuous, 997 integer (997 binary) Root relaxation: objective 0.000000e+00, 313 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 0 248 - 0.00000 - - 0s 0 0 0.00000 0 240 - 0.00000 - - 0s 0 0 0.00000 0 224 - 0.00000 - - 0s 0 0 0.00000 0 293 - 0.00000 - - 0s 0 0 0.00000 0 188 - 0.00000 - - 0s * 0 0 0 0.0000000 0.00000 0.0% - 0s Cutting planes: Clique: 1 Zero half: 86 Explored 0 nodes (6976 simplex iterations) in 0.42 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 0.000000000000e+00, best bound 0.000000000000e+00, gap 0.0% current bounds on the number of colors: 0 -- 4 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:35:53 2012 Optimize a model with 1063 rows, 731 columns and 3056 nonzeros Presolve removed 133 rows and 133 columns Presolve time: 0.00s Presolved: 930 rows, 598 columns, 2790 nonzeros Variable types: 0 continuous, 598 integer (598 binary) Root relaxation: objective 0.000000e+00, 142 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 0 133 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (592 simplex iterations) in 0.01 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound 1.000000000000e+00, gap - current bounds on the number of colors: 2 -- 4 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:35:53 2012 Optimize a model with 1528 rows, 864 columns and 4584 nonzeros Presolve time: 0.00s Presolved: 1528 rows, 864 columns, 4584 nonzeros Variable types: 0 continuous, 864 integer (864 binary) Root relaxation: objective 0.000000e+00, 317 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 0 260 - 0.00000 - - 0s 0 0 0.00000 0 248 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (3015 simplex iterations) in 0.22 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound 1.000000000000e+00, gap - optimal solution found: number of colors: 4