fix(smt2/parser.yy): Fix name_sort_list

Close #245

dreal/smt2/parser.yy

@@ -522,10 +522,10 @@ name_sort: '(' SYMBOL sort ')' {
         ;
 
 name_sort_list: /* empty list */ { $$ = std::vector<Variable>{}; }
-        |       name_sort name_sort_list {
-            const Variable& v = $1;
-	    $2.push_back(v);
-	    $$ = $2;
+        |       name_sort_list name_sort {
+            const Variable& v = $2;
+	    $1.push_back(v);
+	    $$ = $1;
         }
         ;
 

dreal/test/smt2/define_fun_02.smt2.expected

@@ -1,5 +1,5 @@
 delta-sat with delta = 0.001
-z : [-1, -1]
+z : [1, 1]
 (model
-  (define-fun z () Real -1)
+  (define-fun z () Real 1)
 )

dreal/test/smt2/github_245.smt2

@@ -0,0 +1,13 @@
+(set-logic QF_NRA)
+(declare-fun a () Real)
+(declare-fun b () Real)
+(define-fun get_R ((x Real) (y Real)) Real
+(* x (cos y)))
+(assert (= a 12))
+(assert (= b -0.7853981633974483))
+(declare-fun R () Real)
+;(assert (= R (* a (cos b))))
+(assert (= R (get_R a b)))
+(check-sat)
+(get-model)
+

dreal/test/smt2/github_245.smt2.expected

@@ -0,0 +1,6 @@
+delta-sat with delta = 0.001
+(model
+  (define-fun a () Real 12)
+  (define-fun b () Real [-0.78539816339744839, -0.78539816339744828])
+  (define-fun R () Real [8.4852813742385571, 8.4852813742385855])
+)

dreal/test/smt2/option_smtlib2_compliant_01.smt2.expected

@@ -1,5 +1,5 @@
 delta-sat
 0.001
 (
-	(z (- 1))
+	(z 1)
 )