current bounds on the number of colors: 0 -- 35 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 17:57:43 2012 Optimize a model with 5305 rows, 905 columns and 16405 nonzeros Presolve time: 0.02s Presolved: 5305 rows, 905 columns, 16405 nonzeros Variable types: 0 continuous, 905 integer (905 binary) Root relaxation: objective 0.000000e+00, 78 iterations, 0.01 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 (239 simplex iterations) in 0.03 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 -- 17 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 17:57:43 2012 Optimize a model with 2515 rows, 590 columns and 7720 nonzeros Presolve time: 0.01s Presolved: 2515 rows, 590 columns, 7720 nonzeros Variable types: 0 continuous, 590 integer (590 binary) Root relaxation: objective 0.000000e+00, 71 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 0.00000 0 51 - 0.00000 - - 0s 0 0 0.00000 0 20 - 0.00000 - - 0s 0 0 0.00000 0 121 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Cutting planes: Gomory: 2 Clique: 1 Zero half: 1 Explored 0 nodes (2718 simplex iterations) in 0.19 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 -- 8 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 17:57:43 2012 Optimize a model with 1275 rows, 450 columns and 3860 nonzeros Presolve time: 0.00s Presolved: 1275 rows, 450 columns, 3860 nonzeros Variable types: 0 continuous, 450 integer (450 binary) Root relaxation: objective 0.000000e+00, 71 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 60 - 0.00000 - - 0s 0 0 0.00000 0 64 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (1340 simplex iterations) in 0.11 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: 4 -- 8 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 17:57:44 2012 Optimize a model with 1895 rows, 520 columns and 5790 nonzeros Presolve time: 0.00s Presolved: 1895 rows, 520 columns, 5790 nonzeros Variable types: 0 continuous, 520 integer (520 binary) Root relaxation: objective 0.000000e+00, 70 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 75 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (1469 simplex iterations) in 0.11 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 -- 8 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 17:57:44 2012 Optimize a model with 2205 rows, 555 columns and 6755 nonzeros Presolve time: 0.01s Presolved: 2205 rows, 555 columns, 6755 nonzeros Variable types: 0 continuous, 555 integer (555 binary) Root relaxation: objective 0.000000e+00, 70 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 24 - 0.00000 - - 0s 0 0 0.00000 0 45 - 0.00000 - - 0s 0 0 0.00000 0 85 - 0.00000 - - 0s 0 0 0.00000 0 135 - 0.00000 - - 0s 0 0 0.00000 0 137 - 0.00000 - - 0s 0 0 0.00000 0 121 - 0.00000 - - 0s 0 0 0.00000 0 76 - 0.00000 - - 0s 0 0 0.00000 0 97 - 0.00000 - - 0s 0 0 0.00000 0 101 - 0.00000 - - 0s 0 0 0.00000 0 80 - 0.00000 - - 1s 0 2 0.00000 0 80 - 0.00000 - - 1s Cutting planes: Clique: 21 Zero half: 7 Explored 10 nodes (13106 simplex iterations) in 1.48 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound -, gap - optimal solution found: number of colors: 8