current bounds on the number of colors: 0 -- 46 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:19:46 2012 Optimize a model with 1334 rows, 1114 columns and 4922 nonzeros Presolve removed 3 rows and 69 columns Presolve time: 0.01s Presolved: 1331 rows, 1045 columns, 4853 nonzeros Variable types: 0 continuous, 1045 integer (1045 binary) Root relaxation: objective 0.000000e+00, 79 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 (79 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 -- 23 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:19:46 2012 Optimize a model with 662 rows, 562 columns and 2354 nonzeros Presolve removed 3 rows and 33 columns Presolve time: 0.00s Presolved: 659 rows, 529 columns, 2321 nonzeros Variable types: 0 continuous, 529 integer (529 binary) Root relaxation: objective 0.000000e+00, 80 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 (80 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 -- 11 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:19:46 2012 Optimize a model with 326 rows, 286 columns and 1070 nonzeros Presolve removed 3 rows and 15 columns Presolve time: 0.00s Presolved: 323 rows, 271 columns, 1055 nonzeros Variable types: 0 continuous, 271 integer (271 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 (78 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 -- 5 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:19:46 2012 Optimize a model with 158 rows, 148 columns and 428 nonzeros Presolve removed 48 rows and 52 columns Presolve time: 0.00s Presolved: 110 rows, 96 columns, 330 nonzeros Variable types: 0 continuous, 96 integer (96 binary) Root relaxation: objective 0.000000e+00, 43 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 38 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (138 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 -- 5 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:19:46 2012 Optimize a model with 214 rows, 194 columns and 642 nonzeros Presolve removed 3 rows and 9 columns Presolve time: 0.00s Presolved: 211 rows, 185 columns, 633 nonzeros Variable types: 0 continuous, 185 integer (185 binary) Root relaxation: objective 0.000000e+00, 82 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 (82 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