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 60 rows, 80 columns and 216 nonzeros
Presolve removed 3 rows and 18 columns
Presolve time: 0.00s
Presolved: 57 rows, 62 columns, 198 nonzeros
Variable types: 0 continuous, 62 integer (62 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%


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 36 rows, 44 columns and 108 nonzeros
Presolve removed 3 rows and 9 columns
Presolve time: 0.00s
Presolved: 33 rows, 35 columns, 99 nonzeros
Variable types: 0 continuous, 35 integer (35 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 -- 3

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

Optimize a model with 20 rows, 20 columns and 36 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 28 rows, 32 columns and 72 nonzeros
Presolve removed 12 rows and 15 columns
Presolve time: 0.00s
Presolved: 16 rows, 17 columns, 48 nonzeros
Variable types: 0 continuous, 17 integer (17 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