tests: Add statusdb test

Ensures that `--statusreset` doesn't break the schema.

tests/statusdb/reset.sby

@@ -0,0 +1,14 @@
+[options]
+mode bmc
+depth 100
+expect fail
+
+[engines]
+smtbmc --keep-going boolector
+
+[script]
+read -formal reset.sv
+prep -top demo
+
+[files]
+reset.sv

tests/statusdb/reset.sh

@@ -0,0 +1,11 @@
+#!/bin/bash
+set -e
+
+# run task
+python3 $SBY_MAIN -f $SBY_FILE $TASK
+# task has 3 properties
+python3 $SBY_MAIN -f $SBY_FILE --status | wc -l | grep -q '3'
+# resetting task should work
+python3 $SBY_MAIN -f $SBY_FILE --statusreset
+# clean database should have no properties
+python3 $SBY_MAIN -f $SBY_FILE --status | wc -l | grep -q '0'

tests/statusdb/reset.sv

@@ -0,0 +1,21 @@
+module demo (
+  input clk,
+  output reg [5:0] counter
+);
+  initial counter = 0;
+
+  always @(posedge clk) begin
+    if (counter == 15)
+      counter <= 0;
+    else
+      counter <= counter + 1;
+  end
+
+`ifdef FORMAL
+  always @(posedge clk) begin
+    assert (1);
+    assert (counter < 7);
+    assert (0);
+  end
+`endif
+endmodule