[cost] add inferbo model for NSArray

Summary: As title

Reviewed By: ezgicicek

Differential Revision: D22390462

fbshipit-source-id: bd9157874

infer/src/bufferoverrun/bufferOverrunModels.ml

@@ -428,7 +428,7 @@ let create_copy_array src_exp =
   {exec; check= no_check}
 
 
-module CFArray = struct
+module NSArray = struct
   (** Creates a new array from the given array by copying the first X elements. *)
   let create_array src_exp size_exp =
     let {exec= malloc_exec; check= _} = malloc ~can_be_zero:true size_exp in
@@ -454,6 +454,9 @@ module CFArray = struct
       Dom.Mem.add_stack (Loc.of_id ret_id) length mem
     in
     {exec; check= no_check}
+
+
+  let empty_array = malloc ~can_be_zero:true Exp.zero
 end
 
 module StdArray = struct
@@ -1459,12 +1462,17 @@ module Call = struct
       ; -"strndup" <>$ capt_exp $+ capt_exp $+...$--> strndup
       ; -"vsnprintf" <>--> by_value Dom.Val.Itv.nat
       ; (* ObjC models *)
-        -"CFArrayCreate" <>$ any_arg $+ capt_exp $+ capt_exp $+...$--> CFArray.create_array
+        -"CFArrayCreate" <>$ any_arg $+ capt_exp $+ capt_exp $+...$--> NSArray.create_array
       ; -"CFArrayCreateCopy" <>$ any_arg $+ capt_exp $!--> create_copy_array
-      ; -"CFArrayGetCount" <>$ capt_exp $!--> CFArray.length
+      ; -"CFArrayGetCount" <>$ capt_exp $!--> NSArray.length
-      ; -"CFArrayGetValueAtIndex" <>$ capt_arg $+ capt_arg $!--> CFArray.at
+      ; -"CFArrayGetValueAtIndex" <>$ capt_arg $+ capt_arg $!--> NSArray.at
-      ; -"CFDictionaryGetCount" <>$ capt_exp $!--> CFArray.length
+      ; -"CFDictionaryGetCount" <>$ capt_exp $!--> NSArray.length
-      ; -"MCFArrayGetCount" <>$ capt_exp $!--> CFArray.length
+      ; -"MCFArrayGetCount" <>$ capt_exp $!--> NSArray.length
+      ; -"NSArray" &:: "array" <>--> NSArray.empty_array
+      ; -"NSArray" &:: "init" <>--> NSArray.empty_array
+      ; -"NSArray" &:: "count" <>$ capt_exp $!--> NSArray.length
+      ; -"NSArray" &:: "objectAtIndexedSubscript:" <>$ capt_arg $+ capt_arg $!--> NSArray.at
+      ; -"NSArray" &:: "arrayWithObjects:count:" <>$ capt_exp $+ capt_exp $--> NSArray.create_array
       ; (* C++ models *)
         -"boost" &:: "split"
         $ capt_arg_of_typ (-"std" &:: "vector")

infer/tests/codetoanalyze/objc/performance/NSArray.m

@@ -8,7 +8,14 @@
 
 // init array
 
-void nsarray_init_constant_FP() {
+void nsarray_empty_array_constant() {
+  NSArray* array = [NSArray array];
+
+  for (int i = 0; i < array.count; i++) {
+  }
+}
+
+void nsarray_init_constant() {
   NSArray* array = [[NSArray alloc] init];
 
   for (int i = 0; i < array.count; i++) {
@@ -39,7 +46,9 @@ NSArray* nsarray_init_with_objects_constant() {
   strings[1] = @"Second";
   strings[2] = @"Third";
 
-  return [NSArray arrayWithObjects:strings count:2];
+  NSArray* array = [NSArray arrayWithObjects:strings count:2];
+  for (int i = 0; i < array.count; i++) {
+  }
 }
 
 NSArray* nsarray_array_with_objects_constant() {
@@ -75,14 +84,21 @@ void nsarray_access_constant() {
   }
 }
 
-void nsarray_access_linear_FP(NSArray* array) {
+void nsarray_object_at_indexed_constant_FP() {
+  NSArray* array = @[ @2, @3 ];
+
+  for (int i = 0; i < [array[0] integerValue]; i++) {
+  }
+}
+
+void nsarray_access_linear(NSArray* array) {
   id obj;
   for (int i = 0; i < array.count; i++) {
     obj = array[i];
   }
 }
 
-void nsarray_find_linear_FP(NSArray* array) {
+void nsarray_find_linear(NSArray* array) {
   for (int i = 0; i < array.count && i != [array[i] integerValue]; i++) {
   }
 }
@@ -154,7 +170,7 @@ boolean_t nsarray_is_equal_to_array_linear_FN(NSArray* array1,
 
 // count
 
-void nsarray_count_bounded_linear_FP(NSArray* array) {
+void nsarray_count_bounded_linear(NSArray* array) {
   for (int i = 0; i < array.count; i++) {
   }
 }

infer/tests/codetoanalyze/objc/performance/NSMutableArray.m

@@ -86,7 +86,7 @@ void nsmarray_add_all_constant() {
 
 void nsmarray_set_constant(NSMutableArray* array) { array[0] = @1; }
 
-void nsmarray_set_linear_FP(NSMutableArray* array) {
+void nsmarray_set_linear(NSMutableArray* array) {
   for (int i = 0; i < array.count; i++) {
     array[i] = [NSNumber numberWithInt:([array[i] intValue] + 1)];
   }

infer/tests/codetoanalyze/objc/performance/cost-issues.exp

@@ -1,23 +1,25 @@
 codetoanalyze/objc/performance/NSArray.m, nsarray_access_constant, 42,  OnUIThread:false, []
-codetoanalyze/objc/performance/NSArray.m, nsarray_access_linear_FP, ⊤,  OnUIThread:false, [Unbounded loop,Loop]
+codetoanalyze/objc/performance/NSArray.m, nsarray_access_linear, 3 + 7 ⋅ array.length + 3 ⋅ (array.length + 1),  OnUIThread:false, [{array.length + 1},Loop,{array.length},Loop]
 codetoanalyze/objc/performance/NSArray.m, nsarray_add_object_constant, 8,  OnUIThread:false, []
 codetoanalyze/objc/performance/NSArray.m, nsarray_add_objects_from_array_linear_FN, 8,  OnUIThread:false, []
 codetoanalyze/objc/performance/NSArray.m, nsarray_array_with_objects_constant, 23,  OnUIThread:false, []
 codetoanalyze/objc/performance/NSArray.m, nsarray_binary_search_log_FN, 10,  OnUIThread:false, []
 codetoanalyze/objc/performance/NSArray.m, nsarray_contains_object_linear_FN, 4,  OnUIThread:false, []
-codetoanalyze/objc/performance/NSArray.m, nsarray_count_bounded_linear_FP, ⊤,  OnUIThread:false, [Unbounded loop,Loop]
+codetoanalyze/objc/performance/NSArray.m, nsarray_count_bounded_linear, 3 + 3 ⋅ array.length + 3 ⋅ (array.length + 1),  OnUIThread:false, [{array.length + 1},Loop,{array.length},Loop]
+codetoanalyze/objc/performance/NSArray.m, nsarray_empty_array_constant, 8,  OnUIThread:false, []
 codetoanalyze/objc/performance/NSArray.m, nsarray_enumerator_linear_FN, 14,  OnUIThread:false, []
-codetoanalyze/objc/performance/NSArray.m, nsarray_find_linear_FP, ⊤,  OnUIThread:false, [Unbounded loop,Loop]
+codetoanalyze/objc/performance/NSArray.m, nsarray_find_linear, 4 + 9 ⋅ array.length + 3 ⋅ (array.length + 1),  OnUIThread:false, [{array.length + 1},Loop,{array.length},Loop]
 codetoanalyze/objc/performance/NSArray.m, nsarray_first_object_constant, 4,  OnUIThread:false, []
-codetoanalyze/objc/performance/NSArray.m, nsarray_init_constant_FP, ⊤,  OnUIThread:false, [Unbounded loop,Loop]
+codetoanalyze/objc/performance/NSArray.m, nsarray_init_constant, 9,  OnUIThread:false, []
 codetoanalyze/objc/performance/NSArray.m, nsarray_init_with_array_constant_FP, ⊤,  OnUIThread:false, [Call to nsarray_init_with_array_linear_FP,Unbounded loop,Loop]
 codetoanalyze/objc/performance/NSArray.m, nsarray_init_with_array_copy_linear_FP, ⊤,  OnUIThread:false, [Unbounded loop,Loop]
 codetoanalyze/objc/performance/NSArray.m, nsarray_init_with_array_linear_FP, ⊤,  OnUIThread:false, [Unbounded loop,Loop]
-codetoanalyze/objc/performance/NSArray.m, nsarray_init_with_objects_constant, 9,  OnUIThread:false, []
+codetoanalyze/objc/performance/NSArray.m, nsarray_init_with_objects_constant, 26,  OnUIThread:false, []
 codetoanalyze/objc/performance/NSArray.m, nsarray_is_equal_to_array_linear_FN, 5,  OnUIThread:false, []
 codetoanalyze/objc/performance/NSArray.m, nsarray_iterate_linear_FN, 14,  OnUIThread:false, []
 codetoanalyze/objc/performance/NSArray.m, nsarray_last_object_constant, 4,  OnUIThread:false, []
 codetoanalyze/objc/performance/NSArray.m, nsarray_next_object_linear_FN, 10,  OnUIThread:false, []
+codetoanalyze/objc/performance/NSArray.m, nsarray_object_at_indexed_constant_FP, ⊤,  OnUIThread:false, [Unbounded loop,Loop]
 codetoanalyze/objc/performance/NSArray.m, nsarray_sort_using_descriptors_constant, 14,  OnUIThread:false, []
 codetoanalyze/objc/performance/NSArray.m, nsarray_sort_using_descriptors_nlogn_FN, 9,  OnUIThread:false, []
 codetoanalyze/objc/performance/NSArray.m, objc_blocknsarray_binary_search_log_FN_1, 5,  OnUIThread:false, []
@@ -43,7 +45,7 @@ codetoanalyze/objc/performance/NSMutableArray.m, nsmarray_remove_in_loop_constan
 codetoanalyze/objc/performance/NSMutableArray.m, nsmarray_reomove_constant, 15,  OnUIThread:false, []
 codetoanalyze/objc/performance/NSMutableArray.m, nsmarray_set_constant, 4,  OnUIThread:false, []
 codetoanalyze/objc/performance/NSMutableArray.m, nsmarray_set_constant_FP, ⊤,  OnUIThread:false, [Unbounded loop,Loop]
-codetoanalyze/objc/performance/NSMutableArray.m, nsmarray_set_linear_FP, ⊤,  OnUIThread:false, [Unbounded loop,Loop]
+codetoanalyze/objc/performance/NSMutableArray.m, nsmarray_set_linear, 3 + 11 ⋅ array.length + 3 ⋅ (array.length + 1),  OnUIThread:false, [{array.length + 1},Loop,{array.length},Loop]
 codetoanalyze/objc/performance/NSMutableDictionary.m, nsmutabledictionary_set_element_in_loop_linear_FN, 14,  OnUIThread:false, []
 codetoanalyze/objc/performance/NSString.m, call_component_separated_by_string_constant_FP, ⊤,  OnUIThread:false, [Call to component_seperated_by_string_linear_FP,Unbounded loop,Loop]
 codetoanalyze/objc/performance/NSString.m, call_init_with_string_constant_FP, ⊤,  OnUIThread:false, [Call to init_with_string_linear_FP,Unbounded loop,Loop]

infer/tests/codetoanalyze/objc/performance/issues.exp

@@ -1,40 +1,39 @@
-codetoanalyze/objc/performance/NSArray.m, nsarray_access_linear_FP, 0, INFINITE_EXECUTION_TIME, no_bucket, ERROR, [Unbounded loop,Loop]
+codetoanalyze/objc/performance/NSArray.m, nsarray_empty_array_constant, 3, CONDITION_ALWAYS_FALSE, no_bucket, WARNING, [Here]
-codetoanalyze/objc/performance/NSArray.m, nsarray_access_linear_FP, 2, INTEGER_OVERFLOW_U5, no_bucket, ERROR, [<LHS trace>,Unknown value from: NSArray.count,Binary operation: ([0, +oo] + 1):signed32]
-codetoanalyze/objc/performance/NSArray.m, nsarray_count_bounded_linear_FP, 0, INFINITE_EXECUTION_TIME, no_bucket, ERROR, [Unbounded loop,Loop]
-codetoanalyze/objc/performance/NSArray.m, nsarray_count_bounded_linear_FP, 1, INTEGER_OVERFLOW_U5, no_bucket, ERROR, [<LHS trace>,Unknown value from: NSArray.count,Binary operation: ([0, +oo] + 1):signed32]
 codetoanalyze/objc/performance/NSArray.m, nsarray_enumerator_linear_FN, 7, INTEGER_OVERFLOW_U5, no_bucket, ERROR, [<LHS trace>,Assignment,<RHS trace>,Unknown value from: NSEnumerator.nextObject,Assignment,Binary operation: ([-oo, +oo] + [-oo, +oo]):signed64]
-codetoanalyze/objc/performance/NSArray.m, nsarray_find_linear_FP, 0, INFINITE_EXECUTION_TIME, no_bucket, ERROR, [Unbounded loop,Loop]
+codetoanalyze/objc/performance/NSArray.m, nsarray_init_constant, 3, CONDITION_ALWAYS_FALSE, no_bucket, WARNING, [Here]
-codetoanalyze/objc/performance/NSArray.m, nsarray_find_linear_FP, 1, INTEGER_OVERFLOW_U5, no_bucket, ERROR, [<LHS trace>,Unknown value from: NSArray.count,Binary operation: ([0, +oo] + 1):signed32]
-codetoanalyze/objc/performance/NSArray.m, nsarray_init_constant_FP, 0, INFINITE_EXECUTION_TIME, no_bucket, ERROR, [Unbounded loop,Loop]
-codetoanalyze/objc/performance/NSArray.m, nsarray_init_constant_FP, 3, INTEGER_OVERFLOW_U5, no_bucket, ERROR, [<LHS trace>,Unknown value from: NSArray.count,Binary operation: ([0, +oo] + 1):signed32]
 codetoanalyze/objc/performance/NSArray.m, nsarray_init_with_array_constant_FP, 0, INFINITE_EXECUTION_TIME, no_bucket, ERROR, [Call to nsarray_init_with_array_linear_FP,Unbounded loop,Loop]
 codetoanalyze/objc/performance/NSArray.m, nsarray_init_with_array_copy_linear_FP, 0, INFINITE_EXECUTION_TIME, no_bucket, ERROR, [Unbounded loop,Loop]
-codetoanalyze/objc/performance/NSArray.m, nsarray_init_with_array_copy_linear_FP, 2, INTEGER_OVERFLOW_U5, no_bucket, ERROR, [<LHS trace>,Unknown value from: NSArray.count,Binary operation: ([0, +oo] + 1):signed32]
+codetoanalyze/objc/performance/NSArray.m, nsarray_init_with_array_copy_linear_FP, 2, INTEGER_OVERFLOW_L5, no_bucket, ERROR, [<LHS trace>,Assignment,Binary operation: ([0, +oo] + 1):signed32]
 codetoanalyze/objc/performance/NSArray.m, nsarray_init_with_array_linear_FP, 0, INFINITE_EXECUTION_TIME, no_bucket, ERROR, [Unbounded loop,Loop]
-codetoanalyze/objc/performance/NSArray.m, nsarray_init_with_array_linear_FP, 3, INTEGER_OVERFLOW_U5, no_bucket, ERROR, [<LHS trace>,Unknown value from: NSArray.count,Binary operation: ([0, +oo] + 1):signed32]
+codetoanalyze/objc/performance/NSArray.m, nsarray_init_with_array_linear_FP, 3, INTEGER_OVERFLOW_L5, no_bucket, ERROR, [<LHS trace>,Assignment,Binary operation: ([0, +oo] + 1):signed32]
 codetoanalyze/objc/performance/NSArray.m, nsarray_iterate_linear_FN, 3, INTEGER_OVERFLOW_U5, no_bucket, ERROR, [<LHS trace>,Assignment,<RHS trace>,Unknown value from: NSArray.nextObject,Assignment,Binary operation: ([-oo, +oo] + [-oo, +oo]):signed64]
+codetoanalyze/objc/performance/NSArray.m, nsarray_object_at_indexed_constant_FP, 0, INFINITE_EXECUTION_TIME, no_bucket, ERROR, [Unbounded loop,Loop]
+codetoanalyze/objc/performance/NSArray.m, nsarray_object_at_indexed_constant_FP, 3, BUFFER_OVERRUN_U5, no_bucket, ERROR, [<Length trace>,Unknown value from: NSArray.arrayWithObjects:count:,Assignment,Array access: Offset: [-oo, +oo] Size: [0, +oo]]
+codetoanalyze/objc/performance/NSArray.m, nsarray_object_at_indexed_constant_FP, 3, INTEGER_OVERFLOW_U5, no_bucket, ERROR, [<LHS trace>,Unknown value from: NSNumber.integerValue,Binary operation: ([0, +oo] + 1):signed32]
+codetoanalyze/objc/performance/NSArray.m, nsarray_sort_using_descriptors_constant, 4, BUFFER_OVERRUN_U5, no_bucket, ERROR, [<Length trace>,Unknown value from: NSSortDescriptor.initWithKey:ascending:,Assignment,Array access: Offset added: [-oo, +oo] Size: [0, +oo]]
+codetoanalyze/objc/performance/NSArray.m, nsarray_sort_using_descriptors_nlogn_FN, 3, BUFFER_OVERRUN_U5, no_bucket, ERROR, [<Length trace>,Unknown value from: NSSortDescriptor.initWithKey:ascending:,Assignment,Array access: Offset added: [-oo, +oo] Size: [0, +oo]]
 codetoanalyze/objc/performance/NSDictionary.m, nsdictionary_all_keys_linear_FP, 0, INFINITE_EXECUTION_TIME, no_bucket, ERROR, [Unbounded loop,Loop]
-codetoanalyze/objc/performance/NSDictionary.m, nsdictionary_all_keys_linear_FP, 1, INTEGER_OVERFLOW_U5, no_bucket, ERROR, [<LHS trace>,Unknown value from: NSArray.count,Binary operation: ([0, +oo] + 1):signed32]
+codetoanalyze/objc/performance/NSDictionary.m, nsdictionary_all_keys_linear_FP, 1, INTEGER_OVERFLOW_L5, no_bucket, ERROR, [<LHS trace>,Assignment,Binary operation: ([0, +oo] + 1):signed32]
 codetoanalyze/objc/performance/NSDictionary.m, nsdictionary_all_values_linear_FP, 0, INFINITE_EXECUTION_TIME, no_bucket, ERROR, [Unbounded loop,Loop]
-codetoanalyze/objc/performance/NSDictionary.m, nsdictionary_all_values_linear_FP, 1, INTEGER_OVERFLOW_U5, no_bucket, ERROR, [<LHS trace>,Unknown value from: NSArray.count,Binary operation: ([0, +oo] + 1):signed32]
+codetoanalyze/objc/performance/NSDictionary.m, nsdictionary_all_values_linear_FP, 1, INTEGER_OVERFLOW_L5, no_bucket, ERROR, [<LHS trace>,Assignment,Binary operation: ([0, +oo] + 1):signed32]
 codetoanalyze/objc/performance/NSDictionary.m, nsdictionary_init_with_dictionary_linear_FP, 0, INFINITE_EXECUTION_TIME, no_bucket, ERROR, [Unbounded loop,Loop]
-codetoanalyze/objc/performance/NSDictionary.m, nsdictionary_init_with_dictionary_linear_FP, 2, INTEGER_OVERFLOW_U5, no_bucket, ERROR, [<LHS trace>,Unknown value from: NSArray.count,Binary operation: ([0, +oo] + 1):signed32]
+codetoanalyze/objc/performance/NSDictionary.m, nsdictionary_init_with_dictionary_linear_FP, 2, INTEGER_OVERFLOW_L5, no_bucket, ERROR, [<LHS trace>,Assignment,Binary operation: ([0, +oo] + 1):signed32]
 codetoanalyze/objc/performance/NSMutableArray.m, nsmarray_add_in_loop_constant_FP, 0, INFINITE_EXECUTION_TIME, no_bucket, ERROR, [Unbounded loop,Loop]
-codetoanalyze/objc/performance/NSMutableArray.m, nsmarray_add_in_loop_constant_FP, 5, INTEGER_OVERFLOW_U5, no_bucket, ERROR, [<LHS trace>,Unknown value from: NSArray.count,Binary operation: ([0, +oo] + 1):signed32]
+codetoanalyze/objc/performance/NSMutableArray.m, nsmarray_add_in_loop_constant_FP, 5, INTEGER_OVERFLOW_L5, no_bucket, ERROR, [<LHS trace>,Assignment,Binary operation: ([0, +oo] + 1):signed32]
 codetoanalyze/objc/performance/NSMutableArray.m, nsmarray_add_then_loop_constant_FP, 0, INFINITE_EXECUTION_TIME, no_bucket, ERROR, [Unbounded loop,Loop]
-codetoanalyze/objc/performance/NSMutableArray.m, nsmarray_add_then_loop_constant_FP, 14, INTEGER_OVERFLOW_U5, no_bucket, ERROR, [<LHS trace>,Unknown value from: NSArray.count,Binary operation: ([0, +oo] + 1):signed32]
+codetoanalyze/objc/performance/NSMutableArray.m, nsmarray_add_then_loop_constant_FP, 14, INTEGER_OVERFLOW_L5, no_bucket, ERROR, [<LHS trace>,Assignment,Binary operation: ([0, +oo] + 1):signed32]
 codetoanalyze/objc/performance/NSMutableArray.m, nsmarray_init_with_capacity_constant_FP, 0, INFINITE_EXECUTION_TIME, no_bucket, ERROR, [Unbounded loop,Loop]
-codetoanalyze/objc/performance/NSMutableArray.m, nsmarray_init_with_capacity_constant_FP, 3, INTEGER_OVERFLOW_U5, no_bucket, ERROR, [<LHS trace>,Unknown value from: NSArray.count,Binary operation: ([0, +oo] + 1):signed32]
+codetoanalyze/objc/performance/NSMutableArray.m, nsmarray_init_with_capacity_constant_FP, 3, INTEGER_OVERFLOW_L5, no_bucket, ERROR, [<LHS trace>,Assignment,Binary operation: ([0, +oo] + 1):signed32]
 codetoanalyze/objc/performance/NSMutableArray.m, nsmarray_remove_in_loop_constant_FP, 0, INFINITE_EXECUTION_TIME, no_bucket, ERROR, [Unbounded loop,Loop]
-codetoanalyze/objc/performance/NSMutableArray.m, nsmarray_remove_in_loop_constant_FP, 5, INTEGER_OVERFLOW_U5, no_bucket, ERROR, [<LHS trace>,Unknown value from: NSArray.count,Binary operation: ([0, +oo] + 1):signed32]
+codetoanalyze/objc/performance/NSMutableArray.m, nsmarray_remove_in_loop_constant_FP, 5, INTEGER_OVERFLOW_L5, no_bucket, ERROR, [<LHS trace>,Assignment,Binary operation: ([0, +oo] + 1):signed32]
+codetoanalyze/objc/performance/NSMutableArray.m, nsmarray_reomove_constant, 5, BUFFER_OVERRUN_U5, no_bucket, ERROR, [<Length trace>,Unknown value from: NSMutableArray.init,Assignment,Array access: Offset: [-oo, +oo] Size: [0, +oo]]
 codetoanalyze/objc/performance/NSMutableArray.m, nsmarray_set_constant_FP, 0, INFINITE_EXECUTION_TIME, no_bucket, ERROR, [Unbounded loop,Loop]
-codetoanalyze/objc/performance/NSMutableArray.m, nsmarray_set_constant_FP, 6, INTEGER_OVERFLOW_U5, no_bucket, ERROR, [<LHS trace>,Unknown value from: NSArray.count,Binary operation: ([0, +oo] + 1):signed32]
+codetoanalyze/objc/performance/NSMutableArray.m, nsmarray_set_constant_FP, 6, INTEGER_OVERFLOW_L5, no_bucket, ERROR, [<LHS trace>,Assignment,Binary operation: ([0, +oo] + 1):signed32]
-codetoanalyze/objc/performance/NSMutableArray.m, nsmarray_set_linear_FP, 0, INFINITE_EXECUTION_TIME, no_bucket, ERROR, [Unbounded loop,Loop]
+codetoanalyze/objc/performance/NSMutableArray.m, nsmarray_set_linear, 2, INTEGER_OVERFLOW_U5, no_bucket, ERROR, [<LHS trace>,Unknown value from: NSNumber.intValue,Binary operation: ([-oo, +oo] + 1):signed32]
-codetoanalyze/objc/performance/NSMutableArray.m, nsmarray_set_linear_FP, 2, INTEGER_OVERFLOW_U5, no_bucket, ERROR, [<LHS trace>,Unknown value from: NSNumber.intValue,Binary operation: ([-oo, +oo] + 1):signed32]
 codetoanalyze/objc/performance/NSString.m, call_component_separated_by_string_constant_FP, 0, INFINITE_EXECUTION_TIME, no_bucket, ERROR, [Call to component_seperated_by_string_linear_FP,Unbounded loop,Loop]
 codetoanalyze/objc/performance/NSString.m, call_init_with_string_constant_FP, 0, INFINITE_EXECUTION_TIME, no_bucket, ERROR, [Call to init_with_string_linear_FP,Unbounded loop,Loop]
 codetoanalyze/objc/performance/NSString.m, component_seperated_by_string_linear_FP, 0, INFINITE_EXECUTION_TIME, no_bucket, ERROR, [Unbounded loop,Loop]
-codetoanalyze/objc/performance/NSString.m, component_seperated_by_string_linear_FP, 2, INTEGER_OVERFLOW_U5, no_bucket, ERROR, [<LHS trace>,Unknown value from: NSArray.count,Binary operation: ([0, +oo] + 1):signed32]
+codetoanalyze/objc/performance/NSString.m, component_seperated_by_string_linear_FP, 2, INTEGER_OVERFLOW_L5, no_bucket, ERROR, [<LHS trace>,Assignment,Binary operation: ([0, +oo] + 1):signed32]
 codetoanalyze/objc/performance/NSString.m, init_with_bytes_linear_FP, 0, INFINITE_EXECUTION_TIME, no_bucket, ERROR, [Unbounded loop,Loop]
 codetoanalyze/objc/performance/NSString.m, init_with_bytes_linear_FP, 6, INTEGER_OVERFLOW_U5, no_bucket, ERROR, [<LHS trace>,Unknown value from: NSString.length,Binary operation: ([0, +oo] + 1):signed32]
 codetoanalyze/objc/performance/NSString.m, init_with_string_constant_FP, 0, INFINITE_EXECUTION_TIME, no_bucket, ERROR, [Unbounded loop,Loop]