
  check_spec - Perform fair CTL model checking.
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   check_spec [-h] [-m | -o output-file] [ctl-expression]
   
   Evaluates SPEC statements. If no ctl-expression is given at command
   line, then the command evaluates the previously parsed SPEC
   statements, if any. If a formula is false, a path witnessing its
   falsity is printed. Infinite paths are represented by a finite
   sequence of states leading to a cycle.
   
   Command options:
   
   -m
          Pipes the output generated by the command in processing SPECs
          to the program specified by the PAGER shell variable if
          defined, else through the UNIX "more" command.
          
   -o output-file
          Writes the output generated by the command in processing SPECs
          to the file output-file.
          
   ctl-expression
          A CTL formula to be checked.
          
   If the ag_only_search environment variable has been set, and the set
   of reachable states has been already computed, then a specialized
   algorithm to check AG formulas is used instead of the standard model
   checking algorithms.
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   Last updated on 990119 20h08
