current bounds on the number of colors: 0 -- 54 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:34:32 2012 Optimize a model with 19332 rows, 2172 columns and 59292 nonzeros Presolve time: 0.08s Presolved: 19332 rows, 2172 columns, 59292 nonzeros Variable types: 0 continuous, 2172 integer (2172 binary) Root relaxation: objective 0.000000e+00, 165 iterations, 0.02 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 (436 simplex iterations) in 0.13 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 -- 27 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:34:32 2012 Optimize a model with 9336 rows, 1416 columns and 28548 nonzeros Presolve time: 0.03s Presolved: 9336 rows, 1416 columns, 28548 nonzeros Variable types: 0 continuous, 1416 integer (1416 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 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (615 simplex iterations) in 0.07 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 18:34:32 2012 Optimize a model with 4338 rows, 1038 columns and 13176 nonzeros Presolve time: 0.01s Presolved: 4338 rows, 1038 columns, 13176 nonzeros Variable types: 0 continuous, 1038 integer (1038 binary) Root relaxation: objective 0.000000e+00, 108 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 (3544 simplex iterations) in 0.49 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 18:34:33 2012 Optimize a model with 6480 rows, 1200 columns and 19764 nonzeros Presolve time: 0.02s Presolved: 6480 rows, 1200 columns, 19764 nonzeros Variable types: 0 continuous, 1200 integer (1200 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 50 - 0.00000 - - 0s 0 0 0.00000 0 38 - 0.00000 - - 0s 0 0 0.00000 0 171 - 0.00000 - - 1s 0 0 0.00000 0 209 - 0.00000 - - 1s 0 0 0.00000 0 152 - 0.00000 - - 1s 0 0 0.00000 0 179 - 0.00000 - - 2s 0 0 0.00000 0 200 - 0.00000 - - 3s 0 0 0.00000 0 202 - 0.00000 - - 4s 0 0 0.00000 0 202 - 0.00000 - - 4s 0 2 0.00000 0 202 - 0.00000 - - 5s Cutting planes: Clique: 106 Zero half: 7 Explored 323 nodes (64805 simplex iterations) in 8.61 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 -- 13 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:34:42 2012 Optimize a model with 7908 rows, 1308 columns and 24156 nonzeros Presolve time: 0.02s Presolved: 7908 rows, 1308 columns, 24156 nonzeros Variable types: 0 continuous, 1308 integer (1308 binary) Root relaxation: objective 0.000000e+00, 129 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 26 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (1235 simplex iterations) in 0.12 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: 9 -- 11 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 18:34:42 2012 Optimize a model with 7194 rows, 1254 columns and 21960 nonzeros Presolve time: 0.02s Presolved: 7194 rows, 1254 columns, 21960 nonzeros Variable types: 0 continuous, 1254 integer (1254 binary) Root relaxation: objective 0.000000e+00, 122 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 52 - 0.00000 - - 0s 0 0 0.00000 0 38 - 0.00000 - - 0s Cutting planes: Clique: 1 MIR: 1 Explored 0 nodes (2276 simplex iterations) in 0.25 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