current bounds on the number of colors: 0 -- 74 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:14:00 2012 Optimize a model with 1221 rows, 2769 columns and 6179 nonzeros Presolve removed 29 rows and 1073 columns Presolve time: 0.01s Presolved: 1192 rows, 1696 columns, 5106 nonzeros Variable types: 0 continuous, 1696 integer (1696 binary) Root relaxation: objective 0.000000e+00, 70 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 (70 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 -- 37 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:14:00 2012 Optimize a model with 632 rows, 1363 columns and 3006 nonzeros Presolve removed 29 rows and 522 columns Presolve time: 0.00s Presolved: 603 rows, 841 columns, 2484 nonzeros Variable types: 0 continuous, 841 integer (841 binary) Root relaxation: objective 0.000000e+00, 70 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 (70 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 -- 18 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:14:00 2012 Optimize a model with 353 rows, 697 columns and 1503 nonzeros Presolve removed 29 rows and 261 columns Presolve time: 0.00s Presolved: 324 rows, 436 columns, 1242 nonzeros Variable types: 0 continuous, 436 integer (436 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 (66 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 Sat Dec 15 16:14:00 2012 Optimize a model with 198 rows, 327 columns and 668 nonzeros Presolve removed 29 rows and 116 columns Presolve time: 0.00s Presolved: 169 rows, 211 columns, 552 nonzeros Variable types: 0 continuous, 211 integer (211 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 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (64 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 Sat Dec 15 16:14:00 2012 Optimize a model with 136 rows, 179 columns and 334 nonzeros Presolve removed 92 rows and 130 columns Presolve time: 0.00s Presolved: 44 rows, 49 columns, 132 nonzeros Variable types: 0 continuous, 49 integer (49 binary) Root relaxation: objective 0.000000e+00, 16 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 (16 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 -- 2 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:14:00 2012 Optimize a model with 105 rows, 105 columns and 167 nonzeros Presolve removed 105 rows and 105 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 - optimal solution found: number of colors: 2