current bounds on the number of colors: 0 -- 10

Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:19:12 2012

Optimize a model with 40 rows, 56 columns and 140 nonzeros
Presolve removed 5 rows and 25 columns
Presolve time: 0.00s
Presolved: 35 rows, 31 columns, 115 nonzeros
Variable types: 0 continuous, 31 integer (31 binary)

Root relaxation: objective 0.000000e+00, 11 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 (22 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 -- 5

Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:19:12 2012

Optimize a model with 22 rows, 26 columns and 56 nonzeros
Presolve removed 10 rows and 15 columns
Presolve time: 0.00s
Presolved: 12 rows, 11 columns, 36 nonzeros
Variable types: 0 continuous, 11 integer (11 binary)

Root relaxation: objective 0.000000e+00, 7 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    5          -    0.00000     -      -    0s

Explored 0 nodes (13 simplex iterations) in 0.00 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 -- 5

Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:19:12 2012

Optimize a model with 28 rows, 36 columns and 84 nonzeros
Presolve removed 5 rows and 15 columns
Presolve time: 0.00s
Presolved: 23 rows, 21 columns, 69 nonzeros
Variable types: 0 continuous, 21 integer (21 binary)

Root relaxation: objective 0.000000e+00, 12 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 (12 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: 3