fix some test cases, clean up a little bit

lang/src/main/java/edu/kit/iti/formal/psdbg/parser/ast/ASTNode.java

@@ -10,12 +10,12 @@ package edu.kit.iti.formal.psdbg.parser.ast;
  * it under the terms of the GNU General Public License as
  * published by the Free Software Foundation, either version 3 of the
  * License, or (at your option) any later version.
- * 
+ *
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
- * 
+ *
  * You should have received a copy of the GNU General Public
  * License along with this program.  If not, see
  * <http://www.gnu.org/licenses/gpl-3.0.html>.
@@ -25,12 +25,13 @@ package edu.kit.iti.formal.psdbg.parser.ast;
 
 import edu.kit.iti.formal.psdbg.parser.Visitable;
 import edu.kit.iti.formal.psdbg.parser.Visitor;
-import lombok.EqualsAndHashCode;
 import lombok.Getter;
 import lombok.Setter;
+import lombok.val;
 import org.antlr.v4.runtime.ParserRuleContext;
 
 import javax.annotation.Nullable;
+import java.util.Arrays;
 import java.util.Objects;
 
 /**
@@ -47,7 +48,9 @@ public abstract class ASTNode<T extends ParserRuleContext>
     /**
      *
      */
-    @Getter @Setter @Nullable
+    @Getter
+    @Setter
+    @Nullable
     protected ASTNode parent;
 
     /**
@@ -116,7 +119,7 @@ public abstract class ASTNode<T extends ParserRuleContext>
     @Override
     public abstract ASTNode<T> copy();
 
-    public boolean isAncestor(ASTNode node){
+    public boolean isAncestor(ASTNode node) {
         ASTNode n = this;
         do {
             if (n.equals(node))
@@ -140,6 +143,17 @@ public abstract class ASTNode<T extends ParserRuleContext>
         return depth;
     }
 
+    public ASTNode[] getChildren() {
+        return new ASTNode[0];
+    }
+
+    public final ASTNode[] asList() {
+        val ary = getChildren();
+        val nry = Arrays.copyOf(ary, ary.length + 1);
+        nry[nry.length - 1] = this;
+        return nry;
+    }
+
     @Override
     public boolean equals(Object o) {
         if (this == o) return true;

lang/src/main/java/edu/kit/iti/formal/psdbg/parser/ast/AssignmentStatement.java

@@ -10,12 +10,12 @@ package edu.kit.iti.formal.psdbg.parser.ast;
  * it under the terms of the GNU General Public License as
  * published by the Free Software Foundation, either version 3 of the
  * License, or (at your option) any later version.
- * 
+ *
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
- * 
+ *
  * You should have received a copy of the GNU General Public
  * License along with this program.  If not, see
  * <http://www.gnu.org/licenses/gpl-3.0.html>.
@@ -23,7 +23,6 @@ package edu.kit.iti.formal.psdbg.parser.ast;
  */
 
 
-
 import edu.kit.iti.formal.psdbg.parser.ScriptLanguageParser;
 import edu.kit.iti.formal.psdbg.parser.Visitor;
 import edu.kit.iti.formal.psdbg.parser.types.Type;
@@ -74,6 +73,10 @@ public class AssignmentStatement
         return type != null;
     }
 
+    @Override
+    public ASTNode[] getChildren() {
+        return new ASTNode[]{getLhs(), getRhs()};
+    }
 
     @Override
     public boolean eq(ASTNode o) {

lang/src/main/java/edu/kit/iti/formal/psdbg/parser/ast/BinaryExpression.java

@@ -10,12 +10,12 @@ package edu.kit.iti.formal.psdbg.parser.ast;
  * it under the terms of the GNU General Public License as
  * published by the Free Software Foundation, either version 3 of the
  * License, or (at your option) any later version.
- * 
+ *
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
- * 
+ *
  * You should have received a copy of the GNU General Public
  * License along with this program.  If not, see
  * <http://www.gnu.org/licenses/gpl-3.0.html>.
@@ -47,6 +47,11 @@ public class BinaryExpression extends Expression<ParserRuleContext> {
         this.right = right;
     }
 
+    @Override
+    public ASTNode[] getChildren() {
+        return new ASTNode[]{getLeft(), getRight()};
+    }
+
     @Override
     public <T> T accept(Visitor<T> visitor) {
         return visitor.visit(this);

lang/src/main/java/edu/kit/iti/formal/psdbg/parser/ast/CallStatement.java

@@ -10,12 +10,12 @@ package edu.kit.iti.formal.psdbg.parser.ast;
  * it under the terms of the GNU General Public License as
  * published by the Free Software Foundation, either version 3 of the
  * License, or (at your option) any later version.
- * 
+ *
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
- * 
+ *
  * You should have received a copy of the GNU General Public
  * License along with this program.  If not, see
  * <http://www.gnu.org/licenses/gpl-3.0.html>.
@@ -23,7 +23,6 @@ package edu.kit.iti.formal.psdbg.parser.ast;
  */
 
 
-
 import edu.kit.iti.formal.psdbg.parser.ScriptLanguageParser;
 import edu.kit.iti.formal.psdbg.parser.Visitor;
 import lombok.*;
@@ -58,6 +57,11 @@ public class CallStatement extends Statement<ScriptLanguageParser.ScriptCommandC
         return visitor.visit(this);
     }
 
+    @Override
+    public ASTNode[] getChildren() {
+        return new ASTNode[]{getParameters()};
+    }
+
     /**
      * {@inheritDoc}
      */

lang/src/main/java/edu/kit/iti/formal/psdbg/parser/ast/CaseStatement.java

@@ -10,12 +10,12 @@ package edu.kit.iti.formal.psdbg.parser.ast;
  * it under the terms of the GNU General Public License as
  * published by the Free Software Foundation, either version 3 of the
  * License, or (at your option) any later version.
- * 
+ *
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
- * 
+ *
  * You should have received a copy of the GNU General Public
  * License along with this program.  If not, see
  * <http://www.gnu.org/licenses/gpl-3.0.html>.
@@ -44,14 +44,21 @@ public abstract class CaseStatement extends Statement<ScriptLanguageParser.Cases
     /**
      * {@inheritDoc}
      */
-    @Override public <T> T accept(Visitor<T> visitor) {
+    @Override
+    public <T> T accept(Visitor<T> visitor) {
         return visitor.visit(this);
     }
 
     /**
      * {@inheritDoc}
      */
-    @Override public abstract CaseStatement copy();
+    @Override
+    public abstract CaseStatement copy();
+
+    @Override
+    public ASTNode[] getChildren() {
+        return new ASTNode[]{getBody()};
+    }
 
     @Override
     public boolean equals(Object o) {
@@ -63,5 +70,4 @@ public abstract class CaseStatement extends Statement<ScriptLanguageParser.Cases
 
         return getBody().eq(that.getBody());
     }
-
 }

lang/src/main/java/edu/kit/iti/formal/psdbg/parser/ast/CasesStatement.java

@@ -10,12 +10,12 @@ package edu.kit.iti.formal.psdbg.parser.ast;
  * it under the terms of the GNU General Public License as
  * published by the Free Software Foundation, either version 3 of the
  * License, or (at your option) any later version.
- * 
+ *
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
- * 
+ *
  * You should have received a copy of the GNU General Public
  * License along with this program.  If not, see
  * <http://www.gnu.org/licenses/gpl-3.0.html>.
@@ -25,10 +25,7 @@ package edu.kit.iti.formal.psdbg.parser.ast;
 
 import edu.kit.iti.formal.psdbg.parser.ScriptLanguageParser;
 import edu.kit.iti.formal.psdbg.parser.Visitor;
-import lombok.Getter;
-import lombok.NonNull;
-import lombok.RequiredArgsConstructor;
-import lombok.Setter;
+import lombok.*;
 
 import java.util.ArrayList;
 import java.util.List;
@@ -41,22 +38,37 @@ import java.util.List;
 @Getter
 @RequiredArgsConstructor
 public class CasesStatement extends Statement<ScriptLanguageParser.CasesStmtContext> {
-    @NonNull private final List<CaseStatement> cases = new ArrayList<>();
+    @NonNull
+    private final List<CaseStatement> cases = new ArrayList<>();
     // @NonNull private Statements defaultCase = new Statements();
     @NonNull
     private DefaultCaseStatement defCaseStmt = new DefaultCaseStatement();
 
+    @Override
+    public ASTNode[] getChildren() {
+        if (defCaseStmt == null)
+            return (ASTNode[]) cases.toArray();
+        else {
+            val ret = new ASTNode[cases.size() + (defCaseStmt != null ? 1 : 0)];
+            System.arraycopy(cases.toArray(), 0, ret, 0, cases.size());
+            ret[ret.length - 1] = defCaseStmt;
+            return ret;
+        }
+    }
+
     /**
      * {@inheritDoc}
      */
-    @Override public <T> T accept(Visitor<T> visitor) {
+    @Override
+    public <T> T accept(Visitor<T> visitor) {
         return visitor.visit(this);
     }
 
     /**
      * {@inheritDoc}
      */
-    @Override public CasesStatement copy() {
+    @Override
+    public CasesStatement copy() {
         CasesStatement c = new CasesStatement();
         cases.forEach(caseStatement -> c.cases.add(caseStatement.copy()));
         //  if (defaultCase != null)
@@ -76,7 +88,7 @@ public class CasesStatement extends Statement<ScriptLanguageParser.CasesStmtCont
         CasesStatement that = (CasesStatement) o;
 
         for (int i = 0; i < cases.size(); i++) {
-            if(!cases.get(i).eq(that.cases.get(i)))
+            if (!cases.get(i).eq(that.cases.get(i)))
                 return false;
         }
 

lang/src/main/java/edu/kit/iti/formal/psdbg/parser/ast/ClosesCase.java

@@ -19,7 +19,7 @@ public class ClosesCase extends CaseStatement {
      * A close subscript() {bodyscript} expression
      *
      * @param closesGuard the script that is exectued in order to determine whether goal would clos. This proof is pruned afterwards
-     * @param body         the actual script that is then executed when closesscript was successful and pruned
+     * @param body        the actual script that is then executed when closesscript was successful and pruned
      */
     public ClosesCase(Statements closesGuard, Statements body) {
         this.body = body;
@@ -55,4 +55,9 @@ public class ClosesCase extends CaseStatement {
         return getClosesGuard() != null ? getClosesGuard().eq(that.getClosesGuard()) : that.getClosesGuard() == null;
     }
 
+
+    @Override
+    public ASTNode[] getChildren() {
+        return new ASTNode[]{getClosesGuard(), getBody()};
+    }
 }

lang/src/main/java/edu/kit/iti/formal/psdbg/parser/ast/ConditionalBlock.java

 package edu.kit.iti.formal.psdbg.parser.ast;
 
-        /*-
-         * #%L
-         * ProofScriptParser
-         * %%
-         * Copyright (C) 2017 Application-oriented Formal Verification
-         * %%
-         * This program is free software: you can redistribute it and/or modify
-         * it under the terms of the GNU General Public License as
-         * published by the Free Software Foundation, either version 3 of the
-         * License, or (at your option) any later version.
-         *
-         * This program is distributed in the hope that it will be useful,
-         * but WITHOUT ANY WARRANTY; without even the implied warranty of
-         * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-         * GNU General Public License for more details.
-         *
-         * You should have received a copy of the GNU General Public
-         * License along with this program.  If not, see
-         * <http://www.gnu.org/licenses/gpl-3.0.html>.
-         * #L%
-         */
+/*-
+ * #%L
+ * ProofScriptParser
+ * %%
+ * Copyright (C) 2017 Application-oriented Formal Verification
+ * %%
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public
+ * License along with this program.  If not, see
+ * <http://www.gnu.org/licenses/gpl-3.0.html>.
+ * #L%
+ */
 
 
 import edu.kit.iti.formal.psdbg.parser.ScriptLanguageParser;
 import lombok.*;
-import org.antlr.v4.runtime.ParserRuleContext;
 
 /**
  * @author Alexander Weigl
@@ -39,11 +38,13 @@ public abstract class ConditionalBlock
         extends Statement<ScriptLanguageParser.ConditionalBlockContext> {
     @Getter
     @Setter
-    @NonNull protected Statements body = new Statements();
+    @NonNull
+    protected Statements body = new Statements();
 
     @Getter
     @Setter
-    @NonNull protected Expression condition = BooleanLiteral.TRUE;
+    @NonNull
+    protected Expression condition = BooleanLiteral.TRUE;
 
     @Override
     public boolean eq(ASTNode o) {
@@ -56,4 +57,8 @@ public abstract class ConditionalBlock
         return getBody() != null ? getBody().eq(that.getBody()) : that.getBody() == null;
     }
 
+    @Override
+    public ASTNode[] getChildren() {
+        return new ASTNode[]{getCondition(), getBody()};
+    }
 }

lang/src/main/java/edu/kit/iti/formal/psdbg/parser/ast/DefaultCaseStatement.java

@@ -8,7 +8,6 @@ import lombok.Setter;
 @Getter
 @Setter
 public class DefaultCaseStatement extends Statement<ScriptLanguageParser.StmtListContext> {
-
     protected Statements body;
 
     public DefaultCaseStatement() {
@@ -55,6 +54,12 @@ public class DefaultCaseStatement extends Statement<ScriptLanguageParser.StmtLis
         result = 31 * result + getBody().hashCode();
         return result;
     }
+
+
+    @Override
+    public ASTNode[] getChildren() {
+        return new ASTNode[]{getBody()};
+    }
 }
 
 

lang/src/main/java/edu/kit/iti/formal/psdbg/parser/ast/ForeachStatement.java

@@ -10,12 +10,12 @@ package edu.kit.iti.formal.psdbg.parser.ast;
  * it under the terms of the GNU General Public License as
  * published by the Free Software Foundation, either version 3 of the
  * License, or (at your option) any later version.
- * 
+ *
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
- * 
+ *
  * You should have received a copy of the GNU General Public
  * License along with this program.  If not, see
  * <http://www.gnu.org/licenses/gpl-3.0.html>.
@@ -57,4 +57,8 @@ public class ForeachStatement extends UnconditionalBlock {
         fs.setRuleContext(this.ruleContext);
         return fs;
     }
-}
+
+    @Override
+    public ASTNode[] getChildren() {
+        return new ASTNode[]{getBody()};
+    }}

lang/src/main/java/edu/kit/iti/formal/psdbg/parser/ast/GuardedCaseStatement.java

@@ -48,4 +48,8 @@ public class GuardedCaseStatement extends CaseStatement {
         return getGuard().eq(that.getGuard());
     }
 
+    @Override
+    public ASTNode[] getChildren() {
+        return new ASTNode[]{getGuard(), getBody()};
+    }
 }

lang/src/main/java/edu/kit/iti/formal/psdbg/parser/ast/MatchExpression.java

@@ -10,12 +10,12 @@ package edu.kit.iti.formal.psdbg.parser.ast;
  * it under the terms of the GNU General Public License as
  * published by the Free Software Foundation, either version 3 of the
  * License, or (at your option) any later version.
- * 
+ *
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
- * 
+ *
  * You should have received a copy of the GNU General Public
  * License along with this program.  If not, see
  * <http://www.gnu.org/licenses/gpl-3.0.html>.
@@ -30,8 +30,6 @@ import edu.kit.iti.formal.psdbg.parser.types.SimpleType;
 import edu.kit.iti.formal.psdbg.parser.types.TermType;
 import edu.kit.iti.formal.psdbg.parser.types.Type;
 import lombok.Data;
-import lombok.Getter;
-import lombok.Setter;
 
 /**
  * A match expression contains an argument and a uses clause.
@@ -43,13 +41,15 @@ import lombok.Setter;
 public class MatchExpression extends Expression<ScriptLanguageParser.MatchPatternContext> {
     //private Signature signature = new Signature();
     private Expression pattern;
-    @Getter
-    @Setter
     private boolean isDerivable;
-    @Getter
-    @Setter
+    @Deprecated
     private Expression derivableTerm;
 
+    @Override
+    public ASTNode[] getChildren() {
+        return new ASTNode[]{pattern};
+    }
+
     /**
      * {@inheritDoc}
      */
@@ -95,8 +95,4 @@ public class MatchExpression extends Expression<ScriptLanguageParser.MatchPatter
     public int getPrecedence() {
         return Operator.MATCH.precedence();
     }
-
-    public void setPattern(Expression pattern) {
-        this.pattern = pattern;
-    }
 }

lang/src/main/java/edu/kit/iti/formal/psdbg/parser/ast/ProofScript.java

@@ -10,12 +10,12 @@ package edu.kit.iti.formal.psdbg.parser.ast;
  * it under the terms of the GNU General Public License as
  * published by the Free Software Foundation, either version 3 of the
  * License, or (at your option) any later version.
- * 
+ *
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
- * 
+ *
  * You should have received a copy of the GNU General Public
  * License along with this program.  If not, see
  * <http://www.gnu.org/licenses/gpl-3.0.html>.
@@ -58,6 +58,10 @@ public class ProofScript extends ASTNode<ScriptLanguageParser.ScriptContext> {
         return ps;
     }
 
+    @Override
+    public ASTNode[] getChildren() {
+        return new ASTNode[]{getSignature(), getBody()};
+    }
 
     @Override
     public boolean eq(ASTNode o) {

lang/src/main/java/edu/kit/iti/formal/psdbg/parser/ast/Statements.java

@@ -45,6 +45,10 @@ public class Statements extends ASTNode<ScriptLanguageParser.StmtListContext>
         implements Visitable, Iterable<Statement> {
     private final List<Statement> statements = new ArrayList<>();
 
+    @Override
+    public ASTNode[] getChildren() {
+        return (ASTNode[]) toArray();
+    }
 
     public Statements(Statements body) {
         statements.addAll(body.statements);

lang/src/main/java/edu/kit/iti/formal/psdbg/parser/ast/SubstituteExpression.java

@@ -46,9 +46,14 @@ public class SubstituteExpression extends Expression<ScriptLanguageParser.ExprSu
     @Override
     public Type getType(Signature signature) throws NotWelldefinedException {
         Type t = sub.getType(signature);
-        if(!TypeFacade.isTerm(t)){
+        if (!TypeFacade.isTerm(t)) {
             throw new NotWelldefinedException("Term<?> expected, got " + t.symbol(), this);
         }
         return TypeFacade.ANY_TERM;
     }
+
+    @Override
+    public ASTNode[] getChildren() {
+        return new ASTNode[]{getSub()};
+    }
 }

lang/src/main/java/edu/kit/iti/formal/psdbg/parser/ast/TheOnlyStatement.java

@@ -59,4 +59,6 @@ public class TheOnlyStatement extends UnconditionalBlock {
         tos.setRuleContext(this.ruleContext);
         return tos;
     }
+
+
 }

lang/src/main/java/edu/kit/iti/formal/psdbg/parser/ast/UnaryExpression.java

@@ -10,12 +10,12 @@ package edu.kit.iti.formal.psdbg.parser.ast;
  * it under the terms of the GNU General Public License as
  * published by the Free Software Foundation, either version 3 of the
  * License, or (at your option) any later version.
- * 
+ *
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
- * 
+ *
  * You should have received a copy of the GNU General Public
  * License along with this program.  If not, see
  * <http://www.gnu.org/licenses/gpl-3.0.html>.
@@ -23,7 +23,6 @@ package edu.kit.iti.formal.psdbg.parser.ast;
  */
 
 
-
 import edu.kit.iti.formal.psdbg.parser.NotWelldefinedException;
 import edu.kit.iti.formal.psdbg.parser.Visitor;
 import edu.kit.iti.formal.psdbg.parser.types.Type;
@@ -88,4 +87,10 @@ public class UnaryExpression extends Expression<ParserRuleContext> {
     public int getPrecedence() {
         return Operator.NOT.precedence();//a placeholder, because MINUS is used as binary operator,too
     }
+
+
+    @Override
+    public ASTNode[] getChildren() {
+        return new ASTNode[]{getExpression()};
+    }
 }

lang/src/main/java/edu/kit/iti/formal/psdbg/parser/ast/UnconditionalBlock.java

 package edu.kit.iti.formal.psdbg.parser.ast;
 
-        /*-
-         * #%L
-         * ProofScriptParser
-         * %%
-         * Copyright (C) 2017 Application-oriented Formal Verification
-         * %%
-         * This program is free software: you can redistribute it and/or modify
-         * it under the terms of the GNU General Public License as
-         * published by the Free Software Foundation, either version 3 of the
-         * License, or (at your option) any later version.
-         *
-         * This program is distributed in the hope that it will be useful,
-         * but WITHOUT ANY WARRANTY; without even the implied warranty of
-         * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-         * GNU General Public License for more details.
-         *
-         * You should have received a copy of the GNU General Public
-         * License along with this program.  If not, see
-         * <http://www.gnu.org/licenses/gpl-3.0.html>.
-         * #L%
-         */
+/*-
+ * #%L
+ * ProofScriptParser
+ * %%
+ * Copyright (C) 2017 Application-oriented Formal Verification
+ * %%
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *