current bounds on the number of colors: 0 -- 26

Gurobi 5.0.1 (linux64) logging started Thu Dec 13 17:56:12 2012

Optimize a model with 2184 rows, 504 columns and 6812 nonzeros
Presolve time: 0.01s
Presolved: 2184 rows, 504 columns, 6812 nonzeros
Variable types: 0 continuous, 504 integer (504 binary)

Root relaxation: objective 0.000000e+00, 68 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 (135 simplex iterations) in 0.01 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 -- 13

Gurobi 5.0.1 (linux64) logging started Thu Dec 13 17:56:12 2012

Optimize a model with 1022 rows, 322 columns and 3144 nonzeros
Presolve time: 0.00s
Presolved: 1022 rows, 322 columns, 3144 nonzeros
Variable types: 0 continuous, 322 integer (322 binary)

Root relaxation: objective 0.000000e+00, 53 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   22          -    0.00000     -      -    0s
     0     0    0.00000    0   35          -    0.00000     -      -    0s
     0     0 infeasible    0               -    0.10000     -      -    0s

Explored 0 nodes (806 simplex iterations) in 0.04 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: 6 -- 13

Gurobi 5.0.1 (linux64) logging started Thu Dec 13 17:56:12 2012

Optimize a model with 1520 rows, 400 columns and 4716 nonzeros
Presolve time: 0.00s
Presolved: 1520 rows, 400 columns, 4716 nonzeros
Variable types: 0 continuous, 400 integer (400 binary)

Root relaxation: objective 0.000000e+00, 64 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 (231 simplex iterations) in 0.01 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: 6 -- 9

Gurobi 5.0.1 (linux64) logging started Thu Dec 13 17:56:13 2012

Optimize a model with 1188 rows, 348 columns and 3668 nonzeros
Presolve time: 0.00s
Presolved: 1188 rows, 348 columns, 3668 nonzeros
Variable types: 0 continuous, 348 integer (348 binary)

Root relaxation: objective 0.000000e+00, 55 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   28          -    0.00000     -      -    0s
*    0     0               0       0.0000000    0.00000   0.0%     -    0s

Cutting planes:
  Gomory: 2
  Clique: 19
  Zero half: 17

Explored 0 nodes (410 simplex iterations) in 0.02 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: 7