current bounds on the number of colors: 0 -- 53 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:13:24 2012 Optimize a model with 495 rows, 1395 columns and 2704 nonzeros Presolve removed 30 rows and 780 columns Presolve time: 0.00s Presolved: 465 rows, 615 columns, 1924 nonzeros Variable types: 0 continuous, 615 integer (615 binary) Root relaxation: objective 0.000000e+00, 39 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 (39 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 -- 26 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:13:24 2012 Optimize a model with 274 rows, 706 columns and 1352 nonzeros Presolve removed 30 rows and 390 columns Presolve time: 0.00s Presolved: 244 rows, 316 columns, 962 nonzeros Variable types: 0 continuous, 316 integer (316 binary) Root relaxation: objective 0.000000e+00, 40 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 (58 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 -- 13 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:13:24 2012 Optimize a model with 155 rows, 335 columns and 624 nonzeros Presolve removed 30 rows and 180 columns Presolve time: 0.00s Presolved: 125 rows, 155 columns, 444 nonzeros Variable types: 0 continuous, 155 integer (155 binary) Root relaxation: objective 0.000000e+00, 35 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 (35 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 Sat Dec 15 16:13:24 2012 Optimize a model with 104 rows, 176 columns and 312 nonzeros Presolve removed 30 rows and 90 columns Presolve time: 0.00s Presolved: 74 rows, 86 columns, 222 nonzeros Variable types: 0 continuous, 86 integer (86 binary) Root relaxation: objective 0.000000e+00, 34 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 (34 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 Sat Dec 15 16:13:24 2012 Optimize a model with 70 rows, 70 columns and 104 nonzeros Presolve removed 70 rows and 70 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 Sat Dec 15 16:13:24 2012 Optimize a model with 87 rows, 123 columns and 208 nonzeros Presolve removed 61 rows and 95 columns Presolve time: 0.00s Presolved: 26 rows, 28 columns, 78 nonzeros Variable types: 0 continuous, 28 integer (28 binary) Root relaxation: objective 0.000000e+00, 13 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 4 - 0.00000 - - 0s Explored 0 nodes (36 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