current bounds on the number of colors: 0 -- 33 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:35:44 2012 Optimize a model with 881 rows, 581 columns and 3072 nonzeros Presolve removed 2 rows and 32 columns Presolve time: 0.00s Presolved: 879 rows, 549 columns, 3040 nonzeros Variable types: 0 continuous, 549 integer (549 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 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (67 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 457 rows, 317 columns and 1536 nonzeros Presolve removed 2 rows and 16 columns Presolve time: 0.00s Presolved: 455 rows, 301 columns, 1520 nonzeros Variable types: 0 continuous, 301 integer (301 binary) Root relaxation: objective 0.000000e+00, 73 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 (113 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 19:35:45 2012 Optimize a model with 245 rows, 185 columns and 768 nonzeros Presolve removed 2 rows and 8 columns Presolve time: 0.00s Presolved: 243 rows, 177 columns, 760 nonzeros Variable types: 0 continuous, 177 integer (177 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 (112 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 19:35:45 2012 Optimize a model with 139 rows, 119 columns and 384 nonzeros Presolve removed 33 rows and 35 columns Presolve time: 0.00s Presolved: 106 rows, 84 columns, 318 nonzeros Variable types: 0 continuous, 84 integer (84 binary) Root relaxation: objective 0.000000e+00, 36 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 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (108 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 19:35:45 2012 Optimize a model with 192 rows, 152 columns and 576 nonzeros Presolve removed 2 rows and 6 columns Presolve time: 0.00s Presolved: 190 rows, 146 columns, 570 nonzeros Variable types: 0 continuous, 146 integer (146 binary) Root relaxation: objective 0.000000e+00, 73 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 27 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (158 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