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Add setting to remove unnecessary labels #790

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Add setting to remove unnecessary labels #790

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53dc4ad
Add setting to remove unnecessary labels
schuessf Jul 2, 2026
2d1e52e
Add description for setting
schuessf Jul 10, 2026
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7 changes: 6 additions & 1 deletion ...src/de/uni_freiburg/informatik/ultimate/plugins/generator/icfgbuilder/cfg/CfgBuilder.java
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Original file line number Diff line number Diff line change
Expand Up @@ -760,7 +760,7 @@ private IIcfgElement buildCodeBlock(final Statement[] codeblock, final IIcfgElem
mRemovedAssumeTrueStatements++;
continue;
}
if (st instanceof final Label laSt && BoogieUtils.isAuxiliaryLabel(laSt)) {
if (st instanceof final Label laSt && canLabelBeRemoved(laSt)) {
final int gotoTarget = mGotoTargetCounter.getOrDefault(laSt.getName(), 0);
if (gotoTarget == 0) {
// not target of a goto
Expand Down Expand Up @@ -812,6 +812,11 @@ private IIcfgElement buildCodeBlock(final Statement[] codeblock, final IIcfgElem
return currentLocation;
}

private boolean canLabelBeRemoved(final Label label) {
return mServices.getPreferenceProvider(Activator.PLUGIN_ID).getBoolean(
IcfgPreferenceInitializer.LABEL_REMOVE_UNNECESSARY_LABELS) || BoogieUtils.isAuxiliaryLabel(label);
}

private BoogieIcfgLocation buildIf(final BoogieIcfgLocation currentLocation, final IfStatement st) {
mConditionalStarts.add(currentLocation);
final IIcfgElement thenPart = buildCodeBlock(st.getThenPart(), currentLocation, false);
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6 changes: 6 additions & 0 deletions ...ormatik/ultimate/plugins/generator/icfgbuilder/preferences/IcfgPreferenceInitializer.java
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Expand Up @@ -101,6 +101,10 @@ public boolean isConcurrencySafe() {
public static final String LABEL_SIMPLIFY = "Simplify code blocks";
public static final String LABEL_CNF = "Convert code blocks to CNF";
public static final String LABEL_REMOVE_GOTO_EDGES = "Remove goto edges from ICFG";
public static final String LABEL_REMOVE_UNNECESSARY_LABELS = "Remove unnecessary labels from ICFG";
private static final String DESC_REMOVE_UNNECESSARY_LABELS =
"If this option is enabled, any label that has no corresponding goto, or whose goto appears only on the line preceding the label, is removed and not preserved in the ICFG. "
+ "Otherwise, this optimization is only applied for auxiliary labels.";
public static final String LABEL_DUMP_TO_FILE = "Dump SMT script to file";
public static final String LABEL_COMPRESS_SMT_DUMP_FILE = "Compress dumped SMT script";
public static final String DESC_COMPRESS_SMT_DUMP_FILE = "Compress the written .smt2 script with GZip";
Expand Down Expand Up @@ -144,6 +148,8 @@ protected UltimatePreferenceItem<?>[] initDefaultPreferences() {
new UltimatePreferenceItem<>(LABEL_CONTEXT_SWITCH_ONLY_AT_ATOMIC_BOUNDARIES,
DEF_CONTEXT_SWITCH_ONLY_AT_ATOMIC_BOUNDARIES, PreferenceType.Boolean),
new UltimatePreferenceItem<>(LABEL_REMOVE_GOTO_EDGES, false, PreferenceType.Boolean),
new UltimatePreferenceItem<>(LABEL_REMOVE_UNNECESSARY_LABELS, true, DESC_REMOVE_UNNECESSARY_LABELS,
PreferenceType.Boolean),
new UltimatePreferenceItem<>(LABEL_SIMPLIFY, false, PreferenceType.Boolean),
new UltimatePreferenceItem<>(LABEL_CNF, false, PreferenceType.Boolean),
new UltimatePreferenceItem<>(LABEL_SIMPLE_PARTIAL_SKOLEMIZATION, DEF_SIMPLE_PARTIAL_SKOLEMIZATION,
Expand Down