current bounds on the number of colors: 0 -- 169 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 20:50:50 2012 Optimize a model with 59809 rows, 14906 columns and 193116 nonzeros Presolve time: 0.18s Presolved: 59809 rows, 14906 columns, 193116 nonzeros Variable types: 0 continuous, 14906 integer (14906 binary) Root relaxation: objective 0.000000e+00, 622 iterations, 0.05 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 (991 simplex iterations) in 0.32 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 -- 84 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 20:50:51 2012 Optimize a model with 29989 rows, 7808 columns and 96558 nonzeros Presolve time: 0.14s Presolved: 29989 rows, 7808 columns, 96558 nonzeros Variable types: 0 continuous, 7808 integer (7808 binary) Root relaxation: objective 0.000000e+00, 433 iterations, 0.02 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 (787 simplex iterations) in 0.20 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 -- 42 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 20:50:52 2012 Optimize a model with 15079 rows, 4259 columns and 48279 nonzeros Presolve time: 0.06s Presolved: 15079 rows, 4259 columns, 48279 nonzeros Variable types: 0 continuous, 4259 integer (4259 binary) Root relaxation: objective 0.000000e+00, 365 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 (677 simplex iterations) in 0.09 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 -- 21 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 20:50:52 2012 Optimize a model with 7269 rows, 2400 columns and 22990 nonzeros Presolve time: 0.02s Presolved: 7269 rows, 2400 columns, 22990 nonzeros Variable types: 0 continuous, 2400 integer (2400 binary) Root relaxation: objective 0.000000e+00, 363 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 (668 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 -- 10 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 20:50:52 2012 Optimize a model with 3719 rows, 1555 columns and 11495 nonzeros Presolve time: 0.01s Presolved: 3719 rows, 1555 columns, 11495 nonzeros Variable types: 0 continuous, 1555 integer (1555 binary) Root relaxation: objective 0.000000e+00, 372 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 (1407 simplex iterations) in 0.05 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 -- 5 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 20:50:52 2012 Optimize a model with 1589 rows, 1048 columns and 4598 nonzeros Presolve removed 169 rows and 169 columns Presolve time: 0.00s Presolved: 1420 rows, 879 columns, 4260 nonzeros Variable types: 0 continuous, 879 integer (879 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 0.00000 0 169 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (733 simplex iterations) in 0.02 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 -- 5 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 20:50:52 2012 Optimize a model with 2299 rows, 1217 columns and 6897 nonzeros Presolve time: 0.01s Presolved: 2299 rows, 1217 columns, 6897 nonzeros Variable types: 0 continuous, 1217 integer (1217 binary) Root relaxation: objective 0.000000e+00, 399 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 334 - 0.00000 - - 0s 0 0 0.00000 0 328 - 0.00000 - - 0s 0 0 infeasible 0 - 0.10000 - - 0s Explored 0 nodes (4221 simplex iterations) in 0.40 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: 3 -- 5 Gurobi 5.0.1 (linux64) logging started Fri Dec 14 20:50:53 2012 Optimize a model with 3009 rows, 1386 columns and 9196 nonzeros Presolve time: 0.01s Presolved: 3009 rows, 1386 columns, 9196 nonzeros Variable types: 0 continuous, 1386 integer (1386 binary) Root relaxation: objective 0.000000e+00, 391 iterations, 0.01 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 0.00000 0 316 - 0.00000 - - 0s 0 0 0.00000 0 310 - 0.00000 - - 0s 0 0 0.00000 0 324 - 0.00000 - - 0s 0 0 0.00000 0 320 - 0.00000 - - 0s 0 0 0.00000 0 320 - 0.00000 - - 0s 0 0 0.00000 0 318 - 0.00000 - - 0s 0 0 0.00000 0 310 - 0.00000 - - 1s 0 0 0.00000 0 318 - 0.00000 - - 1s 0 0 0.00000 0 308 - 0.00000 - - 1s 0 0 0.00000 0 296 - 0.00000 - - 1s 0 0 0.00000 0 292 - 0.00000 - - 1s 0 0 0.00000 0 284 - 0.00000 - - 2s 0 0 0.00000 0 288 - 0.00000 - - 2s 0 0 0.00000 0 288 - 0.00000 - - 2s 0 0 0.00000 0 268 - 0.00000 - - 3s 0 0 0.00000 0 274 - 0.00000 - - 3s 0 0 0.00000 0 272 - 0.00000 - - 3s 0 2 0.00000 0 270 - 0.00000 - - 3s 307 67 infeasible 15 - 0.00000 - 94.6 5s 608 108 0.00000 12 278 - 0.00000 - 100 10s 613 111 0.00000 13 208 - 0.00000 - 99.1 15s 621 118 0.00000 12 338 - 0.00000 - 190 20s 1158 54 infeasible 25 - 0.00000 - 174 25s 1740 44 0.00000 27 292 - 0.00000 - 170 30s 2298 46 infeasible 30 - 0.00000 - 171 35s * 2494 1 27 0.0000000 0.00000 0.0% 169 36s Cutting planes: Zero half: 17 Explored 2495 nodes (458548 simplex iterations) in 36.51 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