current bounds on the number of colors: 0 -- 18

Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:12:47 2012

Optimize a model with 36 rows, 164 columns and 216 nonzeros
Presolve removed 14 rows and 126 columns
Presolve time: 0.00s
Presolved: 22 rows, 38 columns, 90 nonzeros
Variable types: 0 continuous, 38 integer (38 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%


current bounds on the number of colors: 0 -- 9

Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:12:47 2012

Optimize a model with 26 rows, 74 columns and 96 nonzeros
Presolve removed 14 rows and 56 columns
Presolve time: 0.00s
Presolved: 12 rows, 18 columns, 40 nonzeros
Variable types: 0 continuous, 18 integer (18 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%


current bounds on the number of colors: 0 -- 4

Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:12:47 2012

Optimize a model with 22 rows, 38 columns and 48 nonzeros
Presolve removed 22 rows and 38 columns
Presolve time: 0.00s

Explored 0 nodes (0 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 -- 2

Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:12:47 2012

Optimize a model with 20 rows, 20 columns and 24 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 -


optimal solution found: number of colors: 2