current bounds on the number of colors: 0 -- 108 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:26:23 2012 Optimize a model with 17388 rows, 6152 columns and 57672 nonzeros Presolve removed 1 rows and 54 columns Presolve time: 0.12s Presolved: 17387 rows, 6098 columns, 57618 nonzeros Variable types: 0 continuous, 6098 integer (6098 binary) Root relaxation: objective 0.000000e+00, 294 iterations, 0.01 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 (294 simplex iterations) in 0.14 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 -- 54 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:26:23 2012 Optimize a model with 8748 rows, 3236 columns and 28836 nonzeros Presolve removed 1 rows and 27 columns Presolve time: 0.04s Presolved: 8747 rows, 3209 columns, 28809 nonzeros Variable types: 0 continuous, 3209 integer (3209 binary) Root relaxation: objective 0.000000e+00, 277 iterations, 0.01 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 (478 simplex iterations) in 0.06 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 -- 27 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:26:23 2012 Optimize a model with 4268 rows, 1724 columns and 13884 nonzeros Presolve removed 1 rows and 13 columns Presolve time: 0.01s Presolved: 4267 rows, 1711 columns, 13871 nonzeros Variable types: 0 continuous, 1711 integer (1711 binary) Root relaxation: objective 0.000000e+00, 224 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 (387 simplex iterations) in 0.02 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 -- 13 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:26:23 2012 Optimize a model with 2028 rows, 968 columns and 6408 nonzeros Presolve removed 1 rows and 6 columns Presolve time: 0.01s Presolved: 2027 rows, 962 columns, 6402 nonzeros Variable types: 0 continuous, 962 integer (962 binary) Root relaxation: objective 0.000000e+00, 231 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 (533 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 -- 6 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:26:23 2012 Optimize a model with 1068 rows, 644 columns and 3204 nonzeros Presolve removed 1 rows and 3 columns Presolve time: 0.00s Presolved: 1067 rows, 641 columns, 3201 nonzeros Variable types: 0 continuous, 641 integer (641 binary) Root relaxation: objective 0.000000e+00, 260 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 0 194 - 0.00000 - - 0s 0 0 0.00000 0 204 - 0.00000 - - 0s 0 0 0.00000 0 211 - 0.00000 - - 0s 0 0 0.00000 0 252 - 0.00000 - - 0s 0 0 0.00000 0 258 - 0.00000 - - 0s 0 0 0.00000 0 250 - 0.00000 - - 0s 0 0 0.00000 0 254 - 0.00000 - - 0s 0 0 0.00000 0 242 - 0.00000 - - 0s 0 0 0.00000 0 262 - 0.00000 - - 0s 0 0 0.00000 0 262 - 0.00000 - - 0s 0 2 0.00000 0 253 - 0.00000 - - 0s Cutting planes: Zero half: 16 Explored 13 nodes (10240 simplex iterations) in 0.73 seconds Thread count was 1 (of 16 available processors) Model objective exceeds cutoff Best objective -, best bound -, gap - current bounds on the number of colors: 3 -- 6 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 18:26:24 2012 Optimize a model with 1388 rows, 752 columns and 4272 nonzeros Presolve removed 1 rows and 4 columns Presolve time: 0.00s Presolved: 1387 rows, 748 columns, 4268 nonzeros Variable types: 0 continuous, 748 integer (748 binary) Root relaxation: objective 0.000000e+00, 246 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 94 - 0.00000 - - 0s H 0 0 0.0000000 0.00000 0.0% - 0s Explored 0 nodes (1286 simplex iterations) in 0.04 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: 4