current bounds on the number of colors: 0 -- 145 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:19:11 2012 Optimize a model with 8785 rows, 10560 columns and 36360 nonzeros Presolve removed 23 rows and 1656 columns Presolve time: 0.11s Presolved: 8762 rows, 8904 columns, 34704 nonzeros Variable types: 0 continuous, 8904 integer (8904 binary) Root relaxation: objective 0.000000e+00, 207 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 (298 simplex iterations) in 0.12 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 -- 72 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:19:11 2012 Optimize a model with 4465 rows, 5340 columns and 18180 nonzeros Presolve removed 23 rows and 828 columns Presolve time: 0.04s Presolved: 4442 rows, 4512 columns, 17352 nonzeros Variable types: 0 continuous, 4512 integer (4512 binary) Root relaxation: objective 0.000000e+00, 204 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 (204 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% current bounds on the number of colors: 0 -- 36 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:19:11 2012 Optimize a model with 2305 rows, 2730 columns and 9090 nonzeros Presolve removed 23 rows and 414 columns Presolve time: 0.01s Presolved: 2282 rows, 2316 columns, 8676 nonzeros Variable types: 0 continuous, 2316 integer (2316 binary) Root relaxation: objective 0.000000e+00, 207 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 (295 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 -- 18 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:19:11 2012 Optimize a model with 1225 rows, 1425 columns and 4545 nonzeros Presolve removed 23 rows and 207 columns Presolve time: 0.01s Presolved: 1202 rows, 1218 columns, 4338 nonzeros Variable types: 0 continuous, 1218 integer (1218 binary) Root relaxation: objective 0.000000e+00, 210 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 0.01 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 Sat Dec 15 16:19:11 2012 Optimize a model with 625 rows, 700 columns and 2020 nonzeros Presolve removed 23 rows and 92 columns Presolve time: 0.00s Presolved: 602 rows, 608 columns, 1928 nonzeros Variable types: 0 continuous, 608 integer (608 binary) Root relaxation: objective 0.000000e+00, 192 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 (192 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 16:19:11 2012 Optimize a model with 385 rows, 410 columns and 1010 nonzeros Presolve removed 165 rows and 198 columns Presolve time: 0.00s Presolved: 220 rows, 212 columns, 660 nonzeros Variable types: 0 continuous, 212 integer (212 binary) Root relaxation: objective 0.000000e+00, 117 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 0 102 - 0.00000 - - 0s Explored 0 nodes (375 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 16:19:11 2012 Optimize a model with 505 rows, 555 columns and 1515 nonzeros Presolve removed 23 rows and 69 columns Presolve time: 0.00s Presolved: 482 rows, 486 columns, 1446 nonzeros Variable types: 0 continuous, 486 integer (486 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 0.00 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