current bounds on the number of colors: 0 -- 49 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:11:03 2012 Optimize a model with 14449 rows, 1776 columns and 44376 nonzeros Presolve time: 0.06s Presolved: 14449 rows, 1776 columns, 44376 nonzeros Variable types: 0 continuous, 1776 integer (1776 binary) Root relaxation: objective 0.000000e+00, 121 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 (262 simplex iterations) in 0.09 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 -- 24 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:11:04 2012 Optimize a model with 7249 rows, 1188 columns and 22188 nonzeros Presolve time: 0.02s Presolved: 7249 rows, 1188 columns, 22188 nonzeros Variable types: 0 continuous, 1188 integer (1188 binary) Root relaxation: objective 0.000000e+00, 103 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 (980 simplex iterations) in 0.08 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 -- 12 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:11:04 2012 Optimize a model with 3649 rows, 894 columns and 11094 nonzeros Presolve time: 0.01s Presolved: 3649 rows, 894 columns, 11094 nonzeros Variable types: 0 continuous, 894 integer (894 binary) Root relaxation: objective 0.000000e+00, 98 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 68 - 0.00000 - - 0s 0 0 0.00000 0 60 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (2306 simplex iterations) in 0.27 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 -- 12 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:11:04 2012 Optimize a model with 5449 rows, 1041 columns and 16641 nonzeros Presolve time: 0.01s Presolved: 5449 rows, 1041 columns, 16641 nonzeros Variable types: 0 continuous, 1041 integer (1041 binary) Root relaxation: objective 0.000000e+00, 115 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 38 - 0.00000 - - 0s 0 0 0.00000 0 39 - 0.00000 - - 0s 0 0 0.00000 0 89 - 0.00000 - - 0s 0 0 0.00000 0 177 - 0.00000 - - 0s 0 0 0.00000 0 128 - 0.00000 - - 1s 0 0 0.00000 0 127 - 0.00000 - - 1s 0 0 0.00000 0 179 - 0.00000 - - 2s 0 0 0.00000 0 95 - 0.00000 - - 2s 0 0 0.00000 0 165 - 0.00000 - - 2s 0 0 0.00000 0 171 - 0.00000 - - 3s 0 0 0.00000 0 171 - 0.00000 - - 3s 0 2 0.00000 0 171 - 0.00000 - - 4s 134 4 0.00000 4 144 - 0.00000 - 111 5s Cutting planes: Clique: 83 Zero half: 14 Explored 919 nodes (109542 simplex iterations) in 9.28 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: 9 -- 12 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:11:14 2012 Optimize a model with 6049 rows, 1090 columns and 18490 nonzeros Presolve time: 0.02s Presolved: 6049 rows, 1090 columns, 18490 nonzeros Variable types: 0 continuous, 1090 integer (1090 binary) Root relaxation: objective 0.000000e+00, 116 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 64 - 0.00000 - - 0s 0 0 0.00000 0 40 - 0.00000 - - 0s 0 0 0.00000 0 70 - 0.00000 - - 0s 0 0 0.00000 0 218 - 0.00000 - - 0s * 0 0 0 0.0000000 0.00000 0.0% - 0s Cutting planes: Clique: 38 Zero half: 30 Explored 0 nodes (7682 simplex iterations) in 0.89 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: 10