current bounds on the number of colors: 0 -- 110 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:26:55 2012 Optimize a model with 18425 rows, 6383 columns and 60995 nonzeros Presolve removed 1 rows and 55 columns Presolve time: 0.12s Presolved: 18424 rows, 6328 columns, 60940 nonzeros Variable types: 0 continuous, 6328 integer (6328 binary) Root relaxation: objective 0.000000e+00, 277 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 (277 simplex iterations) in 0.14 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 -- 55 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:26:55 2012 Optimize a model with 9101 rows, 3303 columns and 29943 nonzeros Presolve removed 1 rows and 27 columns Presolve time: 0.04s Presolved: 9100 rows, 3276 columns, 29916 nonzeros Variable types: 0 continuous, 3276 integer (3276 binary) Root relaxation: objective 0.000000e+00, 270 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 (450 simplex iterations) in 0.06 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 Fri Dec 14 18:26:56 2012 Optimize a model with 4439 rows, 1763 columns and 14417 nonzeros Presolve removed 1 rows and 13 columns Presolve time: 0.02s Presolved: 4438 rows, 1750 columns, 14404 nonzeros Variable types: 0 continuous, 1750 integer (1750 binary) Root relaxation: objective 0.000000e+00, 224 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 (390 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 -- 13 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:26:56 2012 Optimize a model with 2108 rows, 993 columns and 6654 nonzeros Presolve removed 1 rows and 6 columns Presolve time: 0.01s Presolved: 2107 rows, 987 columns, 6648 nonzeros Variable types: 0 continuous, 987 integer (987 binary) Root relaxation: objective 0.000000e+00, 248 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 (452 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 -- 6 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:26:56 2012 Optimize a model with 1109 rows, 663 columns and 3327 nonzeros Presolve removed 1 rows and 3 columns Presolve time: 0.00s Presolved: 1108 rows, 660 columns, 3324 nonzeros Variable types: 0 continuous, 660 integer (660 binary) Root relaxation: objective 0.000000e+00, 254 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 0 204 - 0.00000 - - 0s 0 0 0.00000 0 198 - 0.00000 - - 0s 0 0 0.00000 0 232 - 0.00000 - - 0s 0 0 0.00000 0 247 - 0.00000 - - 0s 0 0 0.00000 0 192 - 0.00000 - - 0s 0 0 0.00000 0 201 - 0.00000 - - 0s 0 0 0.00000 0 248 - 0.00000 - - 0s 0 0 0.00000 0 181 - 0.00000 - - 0s 0 0 0.00000 0 212 - 0.00000 - - 0s 0 0 0.00000 0 211 - 0.00000 - - 0s 0 2 0.00000 0 210 - 0.00000 - - 0s Cutting planes: Gomory: 1 Zero half: 12 Explored 3 nodes (10833 simplex iterations) in 0.69 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: 3 -- 6 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:26:56 2012 Optimize a model with 1442 rows, 773 columns and 4436 nonzeros Presolve removed 1 rows and 4 columns Presolve time: 0.00s Presolved: 1441 rows, 769 columns, 4432 nonzeros Variable types: 0 continuous, 769 integer (769 binary) Root relaxation: objective 0.000000e+00, 261 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 89 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (1536 simplex iterations) in 0.05 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: 4