[Cbc] two minor issues in cbc (maxtime and log)

[Matthew Galati]

Two minor issues. This is through the C++ CBCModel API using the latest CBC.


  1.  I set max time (1300 seconds), but CBC did not stop until after 19,900 seconds.
  2.  This is a maximization problem, but the final summary states "Lower bound" for the bound. It might be cleaner to just say "bound" - to avoid confusion.

command line - cbc -solve -quit -seconds 1300 (default strategy 1)
Continuous objective value is 1.88508e+09 - 855.75 seconds
Cgl0005I 998000 SOS with 13941976 members
Cgl0004I processed model has 999000 rows, 13941976 columns (13941976 integer (13                                                                                                 941976 of which binary)) and 26887952 elements
Cutoff increment increased from 1e-05 to 0.9999
Cbc0020I Exiting on maximum time
Cbc0005I Partial search - best objective 1e+50 (best possible -1.885078e+09), to                                                                                                 ok 0 iterations and 0 nodes (19624.31 seconds)
Cbc0035I Maximum depth 0, 0 variables fixed on reduced cost
Cuts at root node changed objective from -1.88508e+09 to -1.88508e+09
Probing was tried 0 times and created 0 cuts of which 0 were active after adding                                                                                                  rounds of cuts (0.000 seconds)
Gomory was tried 0 times and created 0 cuts of which 0 were active after adding                                                                                                  rounds of cuts (0.000 seconds)
Knapsack was tried 0 times and created 0 cuts of which 0 were active after addin                                                                                                 g rounds of cuts (0.000 seconds)
Clique was tried 0 times and created 0 cuts of which 0 were active after adding                                                                                                  rounds of cuts (0.000 seconds)
MixedIntegerRounding2 was tried 0 times and created 0 cuts of which 0 were activ                                                                                                 e after adding rounds of cuts (0.000 seconds)
FlowCover was tried 0 times and created 0 cuts of which 0 were active after addi                                                                                                 ng rounds of cuts (0.000 seconds)
TwoMirCuts was tried 0 times and created 0 cuts of which 0 were active after add                                                                                                 ing rounds of cuts (0.000 seconds)

Result - Stopped on time limit

No feasible solution found
Lower bound:                    1885078031.000
Enumerated nodes:               0
Total iterations:               0
Time (CPU seconds):             19928.34
Time (Wallclock seconds):       19973.07

Total time (CPU seconds):       19930.87   (Wallclock seconds):       19975.64
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