Here's a consistent failure with a smaller cache.
{noformat}
$./t -c fail1.testformat 
t: process 79073 running
snapshot-isolation: 774121 search: expected {0x01}, found {0x00}


t: run FAILED
snapshot-isolation error: Dumping page to RUNDIR/pagedump
snapshot-isolation: 900686 search: expected {0x00}, found {0x01}


t: run FAILED
snapshot-isolation error: Dumping page to RUNDIR/pagedump
snapshot-isolation error: Dumping HS to RUNDIR/HSdump


t: run FAILED
############################################
#  RUN PARAMETERS
############################################
abort=0
alter=0
assert_commit_timestamp=0
assert_read_timestamp=0
auto_throttle=1
backups=0
bitcnt=1
bloom=1
bloom_bit_count=60
bloom_hash_count=23
bloom_oldest=0
cache=80
cache_minimum=0
checkpoints=1
checkpoint_log_size=120
checkpoint_wait=31
checksum=uncompressed
chunk_size=9
compaction=0
compression=snappy
data_extend=0
data_source=table
delete_pct=34
dictionary=0
direct_io=0
encryption=rotn-7
evict_max=1
file_type=fixed-length column-store
firstfit=0
huffman_key=0
huffman_value=0
independent_thread_rng=1
in_memory=0
insert_pct=25
internal_key_truncation=1
internal_page_max=15
isolation=snapshot
key_gap=15
key_max=121
key_min=32
leaf_page_max=11
leak_memory=1
logging=1
logging_archive=0
logging_compression=snappy
logging_file_max=290398
logging_prealloc=0
lsm_worker_threads=3
major_timeout=0
memory_page_max=4
merge_max=10
mmap=1
modify_pct=0
ops=0
prefix_compression=1
prefix_compression_min=6
prepare=0
quiet=1
random_cursor=0
read_pct=32
rebalance=0
repeat_data_pct=44
reverse=0
rows=1000000
runs=1
salvage=0
split_pct=54
statistics=1
statistics_server=0
threads=29
timer=4
timing_stress_aggressive_sweep=0
timing_stress_checkpoint=0
timing_stress_hs_sweep=0
timing_stress_split_1=0
timing_stress_split_2=0
timing_stress_split_3=0
timing_stress_split_4=1
timing_stress_split_5=0
timing_stress_split_6=0
timing_stress_split_7=0
timing_stress_split_8=0
transaction_timestamps=1
transaction-frequency=100
truncate=1
value_max=2505
value_min=10
verify=0
wiredtiger_config=
write_pct=9
############################################
t: FAILED: snap_verify/250: 0
process aborting
Abort trap: 6{noformat}