current bounds on the number of colors: 0 -- 32 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:35:44 2012 Optimize a model with 896 rows, 566 columns and 3104 nonzeros Presolve removed 1 rows and 16 columns Presolve time: 0.00s Presolved: 895 rows, 550 columns, 3088 nonzeros Variable types: 0 continuous, 550 integer (550 binary) Root relaxation: objective 0.000000e+00, 64 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 (105 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 -- 16 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:35:44 2012 Optimize a model with 464 rows, 310 columns and 1552 nonzeros Presolve removed 1 rows and 8 columns Presolve time: 0.00s Presolved: 463 rows, 302 columns, 1544 nonzeros Variable types: 0 continuous, 302 integer (302 binary) Root relaxation: objective 0.000000e+00, 64 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 (94 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 -- 8 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:35:44 2012 Optimize a model with 248 rows, 182 columns and 776 nonzeros Presolve removed 1 rows and 4 columns Presolve time: 0.00s Presolved: 247 rows, 178 columns, 772 nonzeros Variable types: 0 continuous, 178 integer (178 binary) Root relaxation: objective 0.000000e+00, 66 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 (66 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 -- 4 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:35:44 2012 Optimize a model with 140 rows, 118 columns and 388 nonzeros Presolve removed 32 rows and 33 columns Presolve time: 0.00s Presolved: 108 rows, 85 columns, 324 nonzeros Variable types: 0 continuous, 85 integer (85 binary) Root relaxation: objective 0.000000e+00, 31 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 31 - 0.00000 - - 0s Explored 0 nodes (89 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 - current bounds on the number of colors: 2 -- 4 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:35:44 2012 Optimize a model with 194 rows, 150 columns and 582 nonzeros Presolve removed 1 rows and 3 columns Presolve time: 0.00s Presolved: 193 rows, 147 columns, 579 nonzeros Variable types: 0 continuous, 147 integer (147 binary) Root relaxation: objective 0.000000e+00, 78 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 (134 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% optimal solution found: number of colors: 3