current bounds on the number of colors: 0 -- 72 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:20:53 2012 Optimize a model with 4176 rows, 2706 columns and 14904 nonzeros Presolve removed 3 rows and 108 columns Presolve time: 0.03s Presolved: 4173 rows, 2598 columns, 14796 nonzeros Variable types: 0 continuous, 2598 integer (2598 binary) Root relaxation: objective 0.000000e+00, 149 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 (149 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 -- 36 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:20:53 2012 Optimize a model with 2124 rows, 1410 columns and 7452 nonzeros Presolve removed 3 rows and 54 columns Presolve time: 0.01s Presolved: 2121 rows, 1356 columns, 7398 nonzeros Variable types: 0 continuous, 1356 integer (1356 binary) Root relaxation: objective 0.000000e+00, 145 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 (145 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 Fri Dec 14 18:20:53 2012 Optimize a model with 1098 rows, 762 columns and 3726 nonzeros Presolve removed 3 rows and 27 columns Presolve time: 0.00s Presolved: 1095 rows, 735 columns, 3699 nonzeros Variable types: 0 continuous, 735 integer (735 binary) Root relaxation: objective 0.000000e+00, 140 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 0.01 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 -- 9 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:20:53 2012 Optimize a model with 528 rows, 402 columns and 1656 nonzeros Presolve removed 3 rows and 12 columns Presolve time: 0.00s Presolved: 525 rows, 390 columns, 1644 nonzeros Variable types: 0 continuous, 390 integer (390 binary) Root relaxation: objective 0.000000e+00, 146 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 (210 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 18:20:53 2012 Optimize a model with 300 rows, 258 columns and 828 nonzeros Presolve removed 72 rows and 75 columns Presolve time: 0.00s Presolved: 228 rows, 183 columns, 684 nonzeros Variable types: 0 continuous, 183 integer (183 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 0.00000 0 69 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (275 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 18:20:53 2012 Optimize a model with 414 rows, 330 columns and 1242 nonzeros Presolve removed 3 rows and 9 columns Presolve time: 0.00s Presolved: 411 rows, 321 columns, 1233 nonzeros Variable types: 0 continuous, 321 integer (321 binary) Root relaxation: objective 0.000000e+00, 161 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 (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