[SMTChecker] User timeout option

docs/using-the-compiler.rst

@@ -346,7 +346,12 @@ Input Description
       "modelCheckerSettings":
       {
         // Choose which model checker engine to use: all (default), bmc, chc, none.
-        "engine": "chc"
+        "engine": "chc",
+        // Timeout for each SMT query in milliseconds.
+        // If this option is not given, the SMTChecker will use a deterministic
+        // resource limit by default.
+        // A given timeout of 0 means no resource/time restrictions for any query.
+        "timeout": 20000
       }
     }