current bounds on the number of colors: 0 -- 152 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:20:12 2012 Optimize a model with 7752 rows, 11652 columns and 34352 nonzeros Presolve removed 40 rows and 3040 columns Presolve time: 0.11s Presolved: 7712 rows, 8612 columns, 31312 nonzeros Variable types: 0 continuous, 8612 integer (8612 binary) Root relaxation: objective 0.000000e+00, 188 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 (188 simplex iterations) in 0.11 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 -- 76 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:20:12 2012 Optimize a model with 3952 rows, 5876 columns and 17176 nonzeros Presolve removed 40 rows and 1520 columns Presolve time: 0.03s Presolved: 3912 rows, 4356 columns, 15656 nonzeros Variable types: 0 continuous, 4356 integer (4356 binary) Root relaxation: objective 0.000000e+00, 190 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 (190 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 -- 38 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:20:13 2012 Optimize a model with 2052 rows, 2988 columns and 8588 nonzeros Presolve removed 40 rows and 760 columns Presolve time: 0.01s Presolved: 2012 rows, 2228 columns, 7828 nonzeros Variable types: 0 continuous, 2228 integer (2228 binary) Root relaxation: objective 0.000000e+00, 188 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 (188 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 -- 19 Gurobi 5.0.1 (linux64) logging started Sat Dec 15 16:20:13 2012 Optimize a model with 1052 rows, 1468 columns and 4068 nonzeros Presolve removed 40 rows and 360 columns Presolve time: 0.00s Presolved: 1012 rows, 1108 columns, 3708 nonzeros Variable types: 0 continuous, 1108 integer (1108 binary) Root relaxation: objective 0.000000e+00, 188 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 (263 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 16:20:13 2012 Optimize a model with 552 rows, 708 columns and 1808 nonzeros Presolve removed 40 rows and 160 columns Presolve time: 0.00s Presolved: 512 rows, 548 columns, 1648 nonzeros Variable types: 0 continuous, 548 integer (548 binary) Root relaxation: objective 0.000000e+00, 173 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 (173 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 16:20:13 2012 Optimize a model with 352 rows, 404 columns and 904 nonzeros Presolve removed 174 rows and 225 columns Presolve time: 0.00s Presolved: 178 rows, 179 columns, 534 nonzeros Variable types: 0 continuous, 179 integer (179 binary) Root relaxation: objective 0.000000e+00, 96 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 74 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (293 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 16:20:13 2012 Optimize a model with 452 rows, 556 columns and 1356 nonzeros Presolve removed 40 rows and 120 columns Presolve time: 0.00s Presolved: 412 rows, 436 columns, 1236 nonzeros Variable types: 0 continuous, 436 integer (436 binary) Root relaxation: objective 0.000000e+00, 160 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 (160 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