also print unknown for unreliable safe result #1865

Job	Run time
build	5m 30s
create-spec-transformation	12s
deploy-docs	20s
test-docker (theta-cfa-cli)	5m 53s
test-docker (theta-sts-cli)	5m 46s
test-docker (theta-xsts-cli)	5m 38s
test-docker (theta-xta-cli)	5m 54s
test-docker (theta-xcfa-cli)	8m 30s
deploy-maven	0s
test-linux (ubuntu-24.04)	8m 49s
create-archives (Theta)	3m 40s
create-archives (EmergenTheta)	3m 58s
javadoc	4m 55s
create-archives (Thorn)	3m 31s
test-benchexec (SV-COMP25_unreach-call, CEGAR)	17m 52s
test-benchexec (SV-COMP25_unreach-call, BOUNDED)	17m 45s
test-benchexec (SV-COMP25_unreach-call, HORN)	18m 0s
test-benchexec (SV-COMP25_no-data-race, CEGAR)	18m 9s
test-benchexec (SV-COMP25_no-data-race, BOUNDED)	18m 10s
test-benchexec (SV-COMP25_no-data-race, HORN)	17m 58s
test-benchexec (SV-COMP25_valid-memcleanup, CEGAR)	4m 33s
test-benchexec (SV-COMP25_valid-memcleanup, BOUNDED)	4m 29s
test-benchexec (SV-COMP25_valid-memcleanup, HORN)	4m 25s
test-benchexec (SV-COMP25_valid-memsafety, CEGAR)	17m 58s
test-benchexec (SV-COMP25_valid-memsafety, BOUNDED)	17m 56s
test-benchexec (SV-COMP25_valid-memsafety, HORN)	17m 53s
test-benchexec (SV-COMP25_no-overflow, CEGAR)	18m 4s
test-benchexec (SV-COMP25_no-overflow, BOUNDED)	17m 44s
test-benchexec (SV-COMP25_no-overflow, HORN)	17m 48s
test-benchexec (SV-COMP25_termination, CEGAR)	15m 55s
test-benchexec (SV-COMP25_termination, BOUNDED)	15m 24s
test-benchexec (SV-COMP25_termination, HORN)	15m 45s
deploy-release	0s
deploy-docker	0s
collect-results	1m 33s
	5h 39m 57s

Provide feedback