current bounds on the number of colors: 0 -- 59 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:20:13 2012 Optimize a model with 2814 rows, 1806 columns and 9976 nonzeros Presolve removed 1 rows and 29 columns Presolve time: 0.02s Presolved: 2813 rows, 1777 columns, 9947 nonzeros Variable types: 0 continuous, 1777 integer (1777 binary) Root relaxation: objective 0.000000e+00, 117 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 (117 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 -- 29 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:20:13 2012 Optimize a model with 1389 rows, 921 columns and 4816 nonzeros Presolve removed 1 rows and 14 columns Presolve time: 0.01s Presolved: 1388 rows, 907 columns, 4802 nonzeros Variable types: 0 continuous, 907 integer (907 binary) Root relaxation: objective 0.000000e+00, 123 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 (123 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 -- 14 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:20:13 2012 Optimize a model with 724 rows, 508 columns and 2408 nonzeros Presolve removed 1 rows and 7 columns Presolve time: 0.00s Presolved: 723 rows, 501 columns, 2401 nonzeros Variable types: 0 continuous, 501 integer (501 binary) Root relaxation: objective 0.000000e+00, 125 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 (191 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 -- 7 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:20:13 2012 Optimize a model with 344 rows, 272 columns and 1032 nonzeros Presolve removed 1 rows and 3 columns Presolve time: 0.00s Presolved: 343 rows, 269 columns, 1029 nonzeros Variable types: 0 continuous, 269 integer (269 binary) Root relaxation: objective 0.000000e+00, 131 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 (305 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 18:20:13 2012 Optimize a model with 154 rows, 154 columns and 344 nonzeros Presolve removed 154 rows and 154 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 18:20:13 2012 Optimize a model with 249 rows, 213 columns and 688 nonzeros Presolve removed 59 rows and 60 columns Presolve time: 0.00s Presolved: 190 rows, 153 columns, 570 nonzeros Variable types: 0 continuous, 153 integer (153 binary) Root relaxation: objective 0.000000e+00, 67 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 58 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (217 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