current bounds on the number of colors: 0 -- 31 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:19:27 2012 Optimize a model with 466 rows, 494 columns and 1770 nonzeros Presolve removed 5 rows and 75 columns Presolve time: 0.00s Presolved: 461 rows, 419 columns, 1695 nonzeros Variable types: 0 continuous, 419 integer (419 binary) Root relaxation: objective 0.000000e+00, 45 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 (45 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 -- 15 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:19:27 2012 Optimize a model with 234 rows, 246 columns and 826 nonzeros Presolve removed 5 rows and 35 columns Presolve time: 0.00s Presolved: 229 rows, 211 columns, 791 nonzeros Variable types: 0 continuous, 211 integer (211 binary) Root relaxation: objective 0.000000e+00, 42 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 (42 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 18:19:27 2012 Optimize a model with 118 rows, 122 columns and 354 nonzeros Presolve removed 5 rows and 15 columns Presolve time: 0.00s Presolved: 113 rows, 107 columns, 339 nonzeros Variable types: 0 continuous, 107 integer (107 binary) Root relaxation: objective 0.000000e+00, 44 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 (44 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 18:19:27 2012 Optimize a model with 60 rows, 60 columns and 118 nonzeros Presolve removed 60 rows and 60 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 18:19:27 2012 Optimize a model with 89 rows, 91 columns and 236 nonzeros Presolve removed 31 rows and 36 columns Presolve time: 0.00s Presolved: 58 rows, 55 columns, 174 nonzeros Variable types: 0 continuous, 55 integer (55 binary) Root relaxation: objective 0.000000e+00, 28 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 23 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (84 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