current bounds on the number of colors: 0 -- 132 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:17:44 2012 Optimize a model with 7260 rows, 8820 columns and 30096 nonzeros Presolve removed 21 rows and 1386 columns Presolve time: 0.09s Presolved: 7239 rows, 7434 columns, 28710 nonzeros Variable types: 0 continuous, 7434 integer (7434 binary) Root relaxation: objective 0.000000e+00, 189 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 (189 simplex iterations) in 0.10 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 -- 66 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:17:44 2012 Optimize a model with 3696 rows, 4464 columns and 15048 nonzeros Presolve removed 21 rows and 693 columns Presolve time: 0.03s Presolved: 3675 rows, 3771 columns, 14355 nonzeros Variable types: 0 continuous, 3771 integer (3771 binary) Root relaxation: objective 0.000000e+00, 189 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 (189 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 -- 33 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:17:44 2012 Optimize a model with 1860 rows, 2220 columns and 7296 nonzeros Presolve removed 21 rows and 336 columns Presolve time: 0.01s Presolved: 1839 rows, 1884 columns, 6960 nonzeros Variable types: 0 continuous, 1884 integer (1884 binary) Root relaxation: objective 0.000000e+00, 191 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 (191 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 -- 16 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:17:44 2012 Optimize a model with 996 rows, 1164 columns and 3648 nonzeros Presolve removed 21 rows and 168 columns Presolve time: 0.00s Presolved: 975 rows, 996 columns, 3480 nonzeros Variable types: 0 continuous, 996 integer (996 binary) Root relaxation: objective 0.000000e+00, 179 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 (179 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 -- 8 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:17:44 2012 Optimize a model with 564 rows, 636 columns and 1824 nonzeros Presolve removed 21 rows and 84 columns Presolve time: 0.00s Presolved: 543 rows, 552 columns, 1740 nonzeros Variable types: 0 continuous, 552 integer (552 binary) Root relaxation: objective 0.000000e+00, 174 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 (174 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 16:17:44 2012 Optimize a model with 348 rows, 372 columns and 912 nonzeros Presolve removed 144 rows and 171 columns Presolve time: 0.00s Presolved: 204 rows, 201 columns, 612 nonzeros Variable types: 0 continuous, 201 integer (201 binary) Root relaxation: objective 0.000000e+00, 107 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 91 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (325 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 Sat Dec 15 16:17:44 2012 Optimize a model with 456 rows, 504 columns and 1368 nonzeros Presolve removed 21 rows and 63 columns Presolve time: 0.00s Presolved: 435 rows, 441 columns, 1305 nonzeros Variable types: 0 continuous, 441 integer (441 binary) Root relaxation: objective 0.000000e+00, 177 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 (177 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