current bounds on the number of colors: 0 -- 138 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:38:51 2012 Optimize a model with 33258 rows, 10002 columns and 108882 nonzeros Presolve time: 0.16s Presolved: 33258 rows, 10002 columns, 108882 nonzeros Variable types: 0 continuous, 10002 integer (10002 binary) Root relaxation: objective 0.000000e+00, 508 iterations, 0.04 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 (814 simplex iterations) in 0.25 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 -- 69 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:38:52 2012 Optimize a model with 16458 rows, 5172 columns and 53652 nonzeros Presolve time: 0.09s Presolved: 16458 rows, 5172 columns, 53652 nonzeros Variable types: 0 continuous, 5172 integer (5172 binary) Root relaxation: objective 0.000000e+00, 393 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 (672 simplex iterations) in 0.13 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 -- 34 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:38:52 2012 Optimize a model with 8298 rows, 2826 columns and 26826 nonzeros Presolve time: 0.03s Presolved: 8298 rows, 2826 columns, 26826 nonzeros Variable types: 0 continuous, 2826 integer (2826 binary) Root relaxation: objective 0.000000e+00, 282 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 (505 simplex iterations) in 0.05 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 -- 17 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:38:52 2012 Optimize a model with 3978 rows, 1584 columns and 12624 nonzeros Presolve time: 0.01s Presolved: 3978 rows, 1584 columns, 12624 nonzeros Variable types: 0 continuous, 1584 integer (1584 binary) Root relaxation: objective 0.000000e+00, 311 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 (531 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 18:38:53 2012 Optimize a model with 2058 rows, 1032 columns and 6312 nonzeros Presolve time: 0.01s Presolved: 2058 rows, 1032 columns, 6312 nonzeros Variable types: 0 continuous, 1032 integer (1032 binary) Root relaxation: objective 0.000000e+00, 319 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 0 258 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (1293 simplex iterations) in 0.05 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 18:38:53 2012 Optimize a model with 1098 rows, 756 columns and 3156 nonzeros Presolve removed 138 rows and 138 columns Presolve time: 0.00s Presolved: 960 rows, 618 columns, 2880 nonzeros Variable types: 0 continuous, 618 integer (618 binary) Root relaxation: objective 0.000000e+00, 148 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 0 138 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (583 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 18:38:53 2012 Optimize a model with 1578 rows, 894 columns and 4734 nonzeros Presolve time: 0.00s Presolved: 1578 rows, 894 columns, 4734 nonzeros Variable types: 0 continuous, 894 integer (894 binary) Root relaxation: objective 0.000000e+00, 309 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 0 272 - 0.00000 - - 0s 0 0 0.00000 0 270 - 0.00000 - - 0s 0 0 0.00000 0 312 - 0.00000 - - 0s 0 0 0.00000 0 372 - 0.00000 - - 0s 0 0 0.00000 0 357 - 0.00000 - - 0s 0 0 0.00000 0 264 - 0.00000 - - 0s 0 0 0.00000 0 314 - 0.00000 - - 0s 0 0 0.00000 0 338 - 0.00000 - - 1s 0 0 0.00000 0 356 - 0.00000 - - 1s 0 0 0.00000 0 350 - 0.00000 - - 1s 0 2 0.00000 0 342 - 0.00000 - - 1s Cutting planes: Clique: 1 Zero half: 22 Explored 3 nodes (15417 simplex iterations) in 1.58 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound -, gap - optimal solution found: number of colors: 4