ref: 88fd06dac0fd4da6d9f8c8a29913c46f1ca87cda dir: /tests/0036-notneg.c/
int main() { int x; x = 4; if(!x != 0) return 1; if(!!x != 1) return 1; if(-x != 0 - 4) return 1; return 0; }