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

Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:35:31 2012

Optimize a model with 50 rows, 58 columns and 170 nonzeros
Presolve removed 2 rows and 10 columns
Presolve time: 0.00s
Presolved: 48 rows, 48 columns, 160 nonzeros
Variable types: 0 continuous, 48 integer (48 binary)

Root relaxation: objective 0.000000e+00, 14 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 (14 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 Thu Dec 13 19:35:31 2012

Optimize a model with 26 rows, 28 columns and 68 nonzeros
Presolve removed 10 rows and 12 columns
Presolve time: 0.00s
Presolved: 16 rows, 16 columns, 48 nonzeros
Variable types: 0 continuous, 16 integer (16 binary)

Root relaxation: objective 0.000000e+00, 9 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    8          -    0.00000     -      -    0s

Explored 0 nodes (24 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 Thu Dec 13 19:35:31 2012

Optimize a model with 34 rows, 38 columns and 102 nonzeros
Presolve removed 2 rows and 6 columns
Presolve time: 0.00s
Presolved: 32 rows, 32 columns, 96 nonzeros
Variable types: 0 continuous, 32 integer (32 binary)

Root relaxation: objective 0.000000e+00, 17 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 (17 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