current bounds on the number of colors: 0 -- 38 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:35:51 2012 Optimize a model with 1425 rows, 795 columns and 4883 nonzeros Presolve removed 1 rows and 19 columns Presolve time: 0.01s Presolved: 1424 rows, 776 columns, 4864 nonzeros Variable types: 0 continuous, 776 integer (776 binary) Root relaxation: objective 0.000000e+00, 72 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 (72 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 -- 19 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:35:51 2012 Optimize a model with 695 rows, 415 columns and 2313 nonzeros Presolve removed 1 rows and 9 columns Presolve time: 0.00s Presolved: 694 rows, 406 columns, 2304 nonzeros Variable types: 0 continuous, 406 integer (406 binary) Root relaxation: objective 0.000000e+00, 77 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 (77 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 -- 9 Gurobi 5.0.1 (linux64) logging started Thu Dec 13 19:35:51 2012 Optimize a model with 330 rows, 225 columns and 1028 nonzeros Presolve removed 1 rows and 4 columns Presolve time: 0.00s Presolved: 329 rows, 221 columns, 1024 nonzeros Variable types: 0 continuous, 221 integer (221 binary) Root relaxation: objective 0.000000e+00, 85 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 (124 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 19:35:51 2012 Optimize a model with 184 rows, 149 columns and 514 nonzeros Presolve removed 38 rows and 39 columns Presolve time: 0.00s Presolved: 146 rows, 110 columns, 438 nonzeros Variable types: 0 continuous, 110 integer (110 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 0.00000 0 37 - 0.00000 - - 0s Explored 0 nodes (144 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 19:35:51 2012 Optimize a model with 257 rows, 187 columns and 771 nonzeros Presolve removed 1 rows and 3 columns Presolve time: 0.00s Presolved: 256 rows, 184 columns, 768 nonzeros Variable types: 0 continuous, 184 integer (184 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 0.00000 0 54 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (239 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