Added the function to detect infeasible constraints.
Changed constraints between nodes and hypernodes.
Moved the procedures to add some constraints in ilp::weighted_converter_t to ilp::ilp_problem_t.
Fixed bugs that the program terminates on using an axiom including equality literals (=, !=).
Added codes for testing.
Implemented the function for postponement of unifications.
Revised some functions in order to allow an axiom to include equality literals.
Implemented the function to set timeout of each process.
Added a function to define literals which must be hypothesized.
Refactored kb::knowledge_base_t as a singleton class.
Refactored phillip_main_t as a non-singleton class.
Implemented phillip_main_t::infer_parallel and related functions.
Debugged.
Debugged.
Debugged.
Debugged the function of parallel inference.
Added a flag option of do_write_parallel_out.
Updated.