current bounds on the number of colors: 0 -- 64 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:20:25 2012 Optimize a model with 3712 rows, 2162 columns and 12992 nonzeros Presolve removed 3 rows and 96 columns Presolve time: 0.02s Presolved: 3709 rows, 2066 columns, 12896 nonzeros Variable types: 0 continuous, 2066 integer (2066 binary) Root relaxation: objective 0.000000e+00, 142 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 (227 simplex iterations) in 0.03 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 -- 32 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:20:26 2012 Optimize a model with 1888 rows, 1138 columns and 6496 nonzeros Presolve removed 3 rows and 48 columns Presolve time: 0.01s Presolved: 1885 rows, 1090 columns, 6448 nonzeros Variable types: 0 continuous, 1090 integer (1090 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 (212 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 Fri Dec 14 18:20:26 2012 Optimize a model with 976 rows, 626 columns and 3248 nonzeros Presolve removed 3 rows and 24 columns Presolve time: 0.00s Presolved: 973 rows, 602 columns, 3224 nonzeros Variable types: 0 continuous, 602 integer (602 binary) Root relaxation: objective 0.000000e+00, 134 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 (204 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 -- 8 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:20:26 2012 Optimize a model with 520 rows, 370 columns and 1624 nonzeros Presolve removed 3 rows and 12 columns Presolve time: 0.00s Presolved: 517 rows, 358 columns, 1612 nonzeros Variable types: 0 continuous, 358 integer (358 binary) Root relaxation: objective 0.000000e+00, 137 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 (221 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 Fri Dec 14 18:20:26 2012 Optimize a model with 292 rows, 242 columns and 812 nonzeros Presolve removed 64 rows and 67 columns Presolve time: 0.00s Presolved: 228 rows, 175 columns, 684 nonzeros Variable types: 0 continuous, 175 integer (175 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 0.00000 0 61 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (233 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 Fri Dec 14 18:20:26 2012 Optimize a model with 406 rows, 306 columns and 1218 nonzeros Presolve removed 3 rows and 9 columns Presolve time: 0.00s Presolved: 403 rows, 297 columns, 1209 nonzeros Variable types: 0 continuous, 297 integer (297 binary) Root relaxation: objective 0.000000e+00, 148 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 87 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (413 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% optimal solution found: number of colors: 3