current bounds on the number of colors: 0 -- 29 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 17:56:31 2012 Optimize a model with 2829 rows, 606 columns and 8806 nonzeros Presolve time: 0.01s Presolved: 2829 rows, 606 columns, 8806 nonzeros Variable types: 0 continuous, 606 integer (606 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 (143 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 -- 14 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 17:56:31 2012 Optimize a model with 1429 rows, 403 columns and 4403 nonzeros Presolve time: 0.00s Presolved: 1429 rows, 403 columns, 4403 nonzeros Variable types: 0 continuous, 403 integer (403 binary) Root relaxation: objective 0.000000e+00, 58 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 19 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (439 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% current bounds on the number of colors: 0 -- 7 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 17:56:31 2012 Optimize a model with 629 rows, 287 columns and 1887 nonzeros Presolve time: 0.00s Presolved: 629 rows, 287 columns, 1887 nonzeros Variable types: 0 continuous, 287 integer (287 binary) Root relaxation: objective 0.000000e+00, 58 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 58 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Cutting planes: Gomory: 1 Clique: 127 Zero half: 164 Explored 0 nodes (280 simplex iterations) in 0.01 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: 3 -- 7 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 17:56:31 2012 Optimize a model with 1029 rows, 345 columns and 3145 nonzeros Presolve time: 0.00s Presolved: 1029 rows, 345 columns, 3145 nonzeros Variable types: 0 continuous, 345 integer (345 binary) Root relaxation: objective 0.000000e+00, 59 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 42 - 0.00000 - - 0s 0 0 0.00000 0 54 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (900 simplex iterations) in 0.05 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: 5 -- 7 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 17:56:31 2012 Optimize a model with 1229 rows, 374 columns and 3774 nonzeros Presolve time: 0.00s Presolved: 1229 rows, 374 columns, 3774 nonzeros Variable types: 0 continuous, 374 integer (374 binary) Root relaxation: objective 0.000000e+00, 58 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 43 - 0.00000 - - 0s 0 0 0.00000 0 20 - 0.00000 - - 0s 0 0 0.00000 0 120 - 0.00000 - - 0s 0 0 0.00000 0 109 - 0.00000 - - 0s 0 0 0.00000 0 34 - 0.00000 - - 0s 0 0 0.00000 0 102 - 0.00000 - - 0s 0 0 0.00000 0 99 - 0.00000 - - 0s 0 0 0.00000 0 92 - 0.00000 - - 0s 0 0 0.00000 0 30 - 0.00000 - - 0s 0 0 0.00000 0 35 - 0.00000 - - 0s 0 0 0.00000 0 20 - 0.00000 - - 0s 0 0 0.00000 0 74 - 0.00000 - - 0s 0 0 0.00000 0 74 - 0.00000 - - 0s 0 2 0.00000 0 74 - 0.00000 - - 0s Cutting planes: Clique: 7 Zero half: 4 Explored 8 nodes (9013 simplex iterations) in 0.59 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound -, gap - optimal solution found: number of colors: 7