Overflow protection #417

Job	Run time
linux-64-py3.10	5m 1s
estimation_mode_test	15m 53s
macOS	10m 23s
prototype_mtc	41m 21s
develop-docbuild	0s
win-64	9m 15s
prototype_arc	52m 6s
prototype_mtc	42m 44s
placeholder_psrc	35m 22s
prototype_psrc_in_development	4m 11s
random_seed_generation_test	2m 20s
prototype_marin	1m 37s
prototype_mtc_extended	1h 56m 33s
placeholder_sandag	1h 54m 20s
prototype_sandag_xborder	4m 9s
production_semcog	5m 19s
prototype_mwcog	45m 41s
placeholder_multiple_zone	7m 57s
	8h 34m 12s

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