problem        width  bisect    CH     none     step  project     safe   credit
fun1.1             1      42     8        7        7        7        7       19
fun1.2             9      46    12       12       12       12       12       45
fun1.3            99      49    15       30       19       30       19       50
fun1.4         2e+04      57    24       46       59       46       59       58
fun1.5         2e+10      77    44       57       63       57       63       76
fun3.1             5      45    44       61       64       61       64       46
fun4.3         2e+04      57    56       73       70       73       70       58
fun5.1             5      45    44       68       57       68       57       46

legend: ✗ = the run did not reach the root (an unguarded method may not)
if guard='none' marches where 'safe'/'project' crawl, the GUARANTEE is the cap;
if 'none' crawls too, the STEP RULE is the cap.