current bounds on the number of colors: 0 -- 13

Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:35:32 2012

Optimize a model with 55 rows, 85 columns and 204 nonzeros
Presolve removed 4 rows and 24 columns
Presolve time: 0.00s
Presolved: 51 rows, 61 columns, 180 nonzeros
Variable types: 0 continuous, 61 integer (61 binary)

Root relaxation: objective 0.000000e+00, 15 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 (15 simplex iterations) in 0.00 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 -- 6

Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:35:32 2012

Optimize a model with 34 rows, 46 columns and 102 nonzeros
Presolve removed 4 rows and 12 columns
Presolve time: 0.00s
Presolved: 30 rows, 34 columns, 90 nonzeros
Variable types: 0 continuous, 34 integer (34 binary)

Root relaxation: objective 0.000000e+00, 15 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 (15 simplex iterations) in 0.00 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 -- 3

Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:35:32 2012

Optimize a model with 20 rows, 20 columns and 34 nonzeros
Presolve removed 20 rows and 20 columns
Presolve time: 0.00s

Explored 0 nodes (0 simplex iterations) in 0.00 seconds
Thread count was 1 (of 16 available processors)

Model objective exceeds cutoff
Best objective -, best bound -, gap -


current bounds on the number of colors: 1 -- 3

Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:35:32 2012

Optimize a model with 27 rows, 33 columns and 68 nonzeros
Presolve removed 15 rows and 20 columns
Presolve time: 0.00s
Presolved: 12 rows, 13 columns, 36 nonzeros
Variable types: 0 continuous, 13 integer (13 binary)

Root relaxation: objective 0.000000e+00, 6 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 (6 simplex iterations) in 0.00 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%


optimal solution found: number of colors: 2