Replace code with more interesting cases

tests/bugs/core_4350.fbt

@@ -18,17 +18,17 @@
   """
     recreate sequence g1 start with 9223372036854775807 increment by -2147483647;
     recreate sequence g2 start with -9223372036854775808 increment by 2147483647;
+    recreate sequence g3 start with 9223372036854775807 increment by  2147483647;
+    recreate sequence g4 start with -9223372036854775808 increment by -2147483647;
     commit;
     set list on;
-    select next value for g1, next value for g2
-    from rdb$database;
-    select next value for g1, next value for g2
-    from rdb$database;
-    select next value for g1, next value for g2
+    select next value for g1, next value for g2, next value for g3, next value for g4
     from rdb$database;
 
     alter sequence g1 restart;
     alter sequence g2 restart;
+    alter sequence g3 restart;
+    alter sequence g4 restart;
     commit;
 
     show sequ;
@@ -37,15 +37,13 @@
   """
     NEXT_VALUE                      9223372034707292160
     NEXT_VALUE                      -9223372034707292161
-
-    NEXT_VALUE                      9223372032559808513
-    NEXT_VALUE                      -9223372032559808514
-
-    NEXT_VALUE                      9223372030412324866
-    NEXT_VALUE                      -9223372030412324867
-
+    NEXT_VALUE                      -9223372034707292162
+    NEXT_VALUE                      9223372034707292161
+
     Generator G1, current value: 9223372036854775807, initial value: 9223372036854775807, increment: -2147483647
     Generator G2, current value: -9223372036854775808, initial value: -9223372036854775808, increment: 2147483647
+    Generator G3, current value: 9223372036854775807, initial value: 9223372036854775807, increment: 2147483647
+    Generator G4, current value: -9223372036854775808, initial value: -9223372036854775808, increment: -2147483647
   """
 }
 ]