Missing bmc bound and unknown result details added

[AdamZsofi]

@leventeBajczi and I just found that --max-bound on xcfa-cli does nothing. Now it's properly added to the checker.

Also, unknown results were actually not working so far, proofs (well, partial results) were null and this caused issues. Now the different levels of SafetyResult, logging, etc. actually handle it.

@mondokm can you check please if it seems to be in order? Thanks!

[github-actions]

Release Preview

Version: 7.0.4
Tag: v7.0.4

Release Notes:

Modified subprojects (since v7.0.0):
common/analysis
xcfa/xcfa-cli

Files to be uploaded:

upload/EmergenTheta-svcomp.zip
upload/Theta-cfa.zip
upload/Theta-chccomp.zip
upload/Theta-sts.zip
upload/Theta-svcomp.zip
upload/Theta-xsts.zip
upload/Theta-xta.zip
upload/Thorn-svcomp.zip
upload/theta-cfa-cli.jar
upload/theta-solver-smtlib-cli.jar
upload/theta-sts-cli.jar
upload/theta-xcfa-cli.jar
upload/theta-xsts-cli.jar
upload/theta-xta-cli.jar

[github-actions]

Benchexec test report for a selection of SV-Benchmarks (correct / incorrect / all):

Rundefinition	Correct	Incorrect	All	Status
CHC-COMP_Portfolio	0	0	195	❓
Hardware_CEGAR	47	0	54	✅
PLC_CEGAR	9	0	9	✅
PetriNet_MDD	60	0	122	✅
PetriNet_PN_MDD	68	0	122	✅
SV-COMP_Portfolio_Emergent	46	0	94	✅
SV-COMP_Portfolio_Horn	74	0	94	✅
SV-COMP_Portfolio_Stable	46	0	94	✅
Statechart_CEGAR	110	0	126	✅