current bounds on the number of colors: 0 -- 54 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:20:01 2012 Optimize a model with 1809 rows, 1523 columns and 6723 nonzeros Presolve removed 3 rows and 81 columns Presolve time: 0.01s Presolved: 1806 rows, 1442 columns, 6642 nonzeros Variable types: 0 continuous, 1442 integer (1442 binary) Root relaxation: objective 0.000000e+00, 99 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 (99 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 -- 27 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:20:01 2012 Optimize a model with 899 rows, 767 columns and 3237 nonzeros Presolve removed 3 rows and 39 columns Presolve time: 0.00s Presolved: 896 rows, 728 columns, 3198 nonzeros Variable types: 0 continuous, 728 integer (728 binary) Root relaxation: objective 0.000000e+00, 96 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 (96 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 -- 13 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:20:01 2012 Optimize a model with 444 rows, 389 columns and 1494 nonzeros Presolve removed 3 rows and 18 columns Presolve time: 0.00s Presolved: 441 rows, 371 columns, 1476 nonzeros Variable types: 0 continuous, 371 integer (371 binary) Root relaxation: objective 0.000000e+00, 93 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 (93 simplex iterations) in 0.00 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 18:20:01 2012 Optimize a model with 249 rows, 227 columns and 747 nonzeros Presolve removed 3 rows and 9 columns Presolve time: 0.00s Presolved: 246 rows, 218 columns, 738 nonzeros Variable types: 0 continuous, 218 integer (218 binary) Root relaxation: objective 0.000000e+00, 100 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 (145 simplex iterations) in 0.00 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 -- 3 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:20:01 2012 Optimize a model with 119 rows, 119 columns and 249 nonzeros Presolve removed 119 rows and 119 columns Presolve time: 0.00s Explored 0 nodes (0 simplex iterations) in 0.00 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: 1 -- 3 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:20:01 2012 Optimize a model with 184 rows, 173 columns and 498 nonzeros Presolve removed 54 rows and 57 columns Presolve time: 0.00s Presolved: 130 rows, 116 columns, 390 nonzeros Variable types: 0 continuous, 116 integer (116 binary) Root relaxation: objective 0.000000e+00, 57 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 51 - 0.00000 - - 0s Explored 0 nodes (179 simplex iterations) in 0.00 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound 1.000000000000e+00, gap - optimal solution found: number of colors: 3