current bounds on the number of colors: 0 -- 12

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

Optimize a model with 48 rows, 78 columns and 180 nonzeros
Presolve removed 5 rows and 30 columns
Presolve time: 0.00s
Presolved: 43 rows, 48 columns, 150 nonzeros
Variable types: 0 continuous, 48 integer (48 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 (11 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 30 rows, 42 columns and 90 nonzeros
Presolve removed 5 rows and 15 columns
Presolve time: 0.00s
Presolved: 25 rows, 27 columns, 75 nonzeros
Variable types: 0 continuous, 27 integer (27 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%


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 18 rows, 18 columns and 30 nonzeros
Presolve removed 18 rows and 18 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 24 rows, 30 columns and 60 nonzeros
Presolve removed 12 rows and 17 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, 4 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 (4 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