2 files changed, 21 insertions, 0 deletions
diff --git a/Test/triggers/matrix-accesses-are-triggers.dfy b/Test/triggers/matrix-accesses-are-triggers.dfy
new file mode 100644
index 00000000..630fab9d
--- /dev/null
+++ b/Test/triggers/matrix-accesses-are-triggers.dfy
@@ -0,0 +1,9 @@
+// RUN: %dafny /compile:0 /print:"%t.print" /dprint:"%t.dprint" /autoTriggers:1 /printTooltips "%s" > "%t"
+// RUN: %diff "%s.expect" "%t"
+
+// This file checks that multi-dimensional array accesses yield trigger candidates
+
+method M(m: array2<int>)
+  requires m != null
+  requires forall i, j | 0 <= i < m.Length0 && 0 <= j < m.Length1 :: m[i, j] == m[j, i+1] {
+}
diff --git a/Test/triggers/matrix-accesses-are-triggers.dfy.expect b/Test/triggers/matrix-accesses-are-triggers.dfy.expect
new file mode 100644
index 00000000..b9dd1d88
--- /dev/null
+++ b/Test/triggers/matrix-accesses-are-triggers.dfy.expect
@@ -0,0 +1,12 @@
+matrix-accesses-are-triggers.dfy(8,11): Warning: Selected triggers: {m[i, j]} (loops with {m[j, i + 1]})
+ (!) Suppressing loops would leave this expression without triggers.
+matrix-accesses-are-triggers.dfy(8,81): Error: index 0 out of range
+Execution trace:
+    (0,0): anon0
+    (0,0): anon4_Then
+matrix-accesses-are-triggers.dfy(8,86): Error: index 1 out of range
+Execution trace:
+    (0,0): anon0
+    (0,0): anon4_Then
+
+Dafny program verifier finished with 1 verified, 2 errors