1 files changed, 106 insertions, 0 deletions
diff --git a/Test/civl/linear-set2.bpl b/Test/civl/linear-set2.bpl
new file mode 100644
index 00000000..4a0c6a1f
--- /dev/null
+++ b/Test/civl/linear-set2.bpl
@@ -0,0 +1,106 @@
+// RUN: %boogie -noinfer -typeEncoding:m -useArrayTheory "%s" > "%t"
+// RUN: %diff "%s.expect" "%t"
+type X;
+function {:builtin "MapConst"} MapConstInt(int) : [X]int;
+function {:builtin "MapConst"} MapConstBool(bool) : [X]bool;
+function {:builtin "MapOr"} MapOr([X]bool, [X]bool) : [X]bool;
+
+function {:inline} None() : [X]bool
+{
+    MapConstBool(false)
+}
+
+function {:inline} All() : [X]bool
+{
+    MapConstBool(true)
+}
+
+function {:inline} {:linear "x"} XCollector(xs: [X]bool) : [X]bool
+{
+  xs
+}
+
+var {:layer 0,1} x: int;
+var {:layer 0,1} l: X;
+const nil: X;
+
+procedure {:yields} {:layer 1} Split({:linear_in "x"} xls: [X]bool) returns ({:linear "x"} xls1: [X]bool, {:linear "x"} xls2: [X]bool)
+ensures {:layer 1} xls == MapOr(xls1, xls2) && xls1 != None() && xls2 != None();
+{
+  yield;
+  call xls1, xls2 := SplitLow(xls);
+  yield;
+}
+
+procedure {:yields} {:layer 1} Allocate() returns ({:linear "tid"} xls: X)
+ensures {:layer 1} xls != nil;
+{
+  yield;
+  call xls := AllocateLow();
+  yield;
+}
+
+procedure {:yields} {:layer 0,1} Set(v: int);
+ensures {:atomic} |{A: x := v; return true; }|;
+
+procedure {:yields} {:layer 0,1} Lock(tidls: X);
+ensures {:atomic} |{A: assume l == nil; l := tidls; return true; }|;
+
+procedure {:yields} {:layer 0,1} Unlock();
+ensures {:atomic} |{A: l := nil; return true; }|;
+
+procedure {:yields} {:layer 0,1} SplitLow({:linear_in "x"} xls: [X]bool) returns ({:linear "x"} xls1: [X]bool, {:linear "x"} xls2: [X]bool);
+ensures {:atomic} |{ A: assume xls == MapOr(xls1, xls2) && xls1 != None() && xls2 != None(); return true; }|;
+
+procedure {:yields} {:layer 0,1} AllocateLow() returns ({:linear "tid"} xls: X);
+ensures {:atomic} |{ A: assume xls != nil; return true; }|;
+
+procedure {:yields} {:layer 1} main({:linear_in "tid"} tidls': X, {:linear_in "x"} xls': [X]bool) 
+requires {:layer 1} tidls' != nil && xls' == All();
+{
+    var {:linear "tid"} tidls: X;
+    var {:linear "x"} xls: [X]bool;
+    var {:linear "tid"} lsChild: X;
+    var {:linear "x"} xls1: [X]bool;
+    var {:linear "x"} xls2: [X]bool;
+
+    tidls := tidls';
+    xls := xls';
+
+    yield;
+    call Set(42);
+    yield;
+    assert {:layer 1} xls == All();
+    assert {:layer 1} x == 42;
+    call xls1, xls2 := Split(xls);
+    call lsChild := Allocate();
+    yield;
+    async call thread(lsChild, xls1);
+    call lsChild := Allocate();
+    yield;
+    async call thread(lsChild, xls2);
+    yield;
+}
+
+procedure {:yields} {:layer 1} thread({:linear_in "tid"} tidls': X, {:linear_in "x"} xls': [X]bool)
+requires {:layer 1} tidls' != nil && xls' != None();
+{
+    var {:linear "x"} xls: [X]bool;
+    var {:linear "tid"} tidls: X;
+
+    tidls := tidls';
+    xls := xls';
+
+    yield;
+    call Lock(tidls);
+    yield;
+    assert {:layer 1} tidls != nil && xls != None();
+    call Set(0);
+    yield;
+    assert {:layer 1} tidls != nil && xls != None();
+    assert {:layer 1} x == 0;
+    yield;
+    assert {:layer 1} tidls != nil && xls != None();
+    call Unlock();
+    yield;
+}