current bounds on the number of colors: 0 -- 136 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:37:29 2012 Optimize a model with 29716 rows, 9683 columns and 97988 nonzeros Presolve time: 0.14s Presolved: 29716 rows, 9683 columns, 97988 nonzeros Variable types: 0 continuous, 9683 integer (9683 binary) Root relaxation: objective 0.000000e+00, 439 iterations, 0.02 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 (718 simplex iterations) in 0.21 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 -- 68 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:37:29 2012 Optimize a model with 14926 rows, 5059 columns and 48994 nonzeros Presolve time: 0.08s Presolved: 14926 rows, 5059 columns, 48994 nonzeros Variable types: 0 continuous, 5059 integer (5059 binary) Root relaxation: objective 0.000000e+00, 357 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 (604 simplex iterations) in 0.10 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 18:37:29 2012 Optimize a model with 7531 rows, 2747 columns and 24497 nonzeros Presolve time: 0.03s Presolved: 7531 rows, 2747 columns, 24497 nonzeros Variable types: 0 continuous, 2747 integer (2747 binary) Root relaxation: objective 0.000000e+00, 280 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 (492 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 -- 17 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:37:30 2012 Optimize a model with 3616 rows, 1523 columns and 11528 nonzeros Presolve time: 0.01s Presolved: 3616 rows, 1523 columns, 11528 nonzeros Variable types: 0 continuous, 1523 integer (1523 binary) Root relaxation: objective 0.000000e+00, 301 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 (538 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 18:37:30 2012 Optimize a model with 1876 rows, 979 columns and 5764 nonzeros Presolve time: 0.00s Presolved: 1876 rows, 979 columns, 5764 nonzeros Variable types: 0 continuous, 979 integer (979 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 0 230 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (1385 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 -- 4 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:37:30 2012 Optimize a model with 1006 rows, 707 columns and 2882 nonzeros Presolve removed 136 rows and 136 columns Presolve time: 0.00s Presolved: 870 rows, 571 columns, 2610 nonzeros Variable types: 0 continuous, 571 integer (571 binary) Root relaxation: objective 0.000000e+00, 144 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 0 136 - 0.00000 - - 0s Explored 0 nodes (556 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 18:37:30 2012 Optimize a model with 1441 rows, 843 columns and 4323 nonzeros Presolve time: 0.00s Presolved: 1441 rows, 843 columns, 4323 nonzeros Variable types: 0 continuous, 843 integer (843 binary) Root relaxation: objective 0.000000e+00, 300 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 0 0 0.00000 0 256 - 0.00000 - - 0s 0 0 0.00000 0 256 - 0.00000 - - 0s 0 0 0.00000 0 345 - 0.00000 - - 0s 0 0 0.00000 0 253 - 0.00000 - - 0s 0 0 0.00000 0 273 - 0.00000 - - 0s 0 0 0.00000 0 339 - 0.00000 - - 0s 0 0 0.00000 0 325 - 0.00000 - - 0s 0 0 0.00000 0 337 - 0.00000 - - 1s 0 0 0.00000 0 337 - 0.00000 - - 1s 0 2 0.00000 0 337 - 0.00000 - - 1s Cutting planes: Clique: 2 Zero half: 22 Explored 5 nodes (14713 simplex iterations) in 1.29 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