current bounds on the number of colors: 0 -- 108 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:26:25 2012 Optimize a model with 16470 rows, 6135 columns and 54918 nonzeros Presolve time: 0.12s Presolved: 16470 rows, 6135 columns, 54918 nonzeros Variable types: 0 continuous, 6135 integer (6135 binary) Root relaxation: objective 0.000000e+00, 313 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 (513 simplex iterations) in 0.15 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 -- 54 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:26:25 2012 Optimize a model with 8289 rows, 3219 columns and 27459 nonzeros Presolve time: 0.04s Presolved: 8289 rows, 3219 columns, 27459 nonzeros Variable types: 0 continuous, 3219 integer (3219 binary) Root relaxation: objective 0.000000e+00, 258 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 (258 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% current bounds on the number of colors: 0 -- 27 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:26:25 2012 Optimize a model with 4047 rows, 1707 columns and 13221 nonzeros Presolve time: 0.01s Presolved: 4047 rows, 1707 columns, 13221 nonzeros Variable types: 0 continuous, 1707 integer (1707 binary) Root relaxation: objective 0.000000e+00, 223 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 (397 simplex iterations) in 0.02 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 18:26:25 2012 Optimize a model with 1926 rows, 951 columns and 6102 nonzeros Presolve time: 0.01s Presolved: 1926 rows, 951 columns, 6102 nonzeros Variable types: 0 continuous, 951 integer (951 binary) Root relaxation: objective 0.000000e+00, 281 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 (458 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 18:26:25 2012 Optimize a model with 1017 rows, 627 columns and 3051 nonzeros Presolve time: 0.00s Presolved: 1017 rows, 627 columns, 3051 nonzeros Variable types: 0 continuous, 627 integer (627 binary) Root relaxation: objective 0.000000e+00, 242 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 0 162 - 0.00000 - - 0s 0 0 0.00000 0 180 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (2355 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: 3 -- 6 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:26:25 2012 Optimize a model with 1320 rows, 735 columns and 4068 nonzeros Presolve time: 0.00s Presolved: 1320 rows, 735 columns, 4068 nonzeros Variable types: 0 continuous, 735 integer (735 binary) Root relaxation: objective 0.000000e+00, 265 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 0 106 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (1112 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% optimal solution found: number of colors: 4