Remove IsaCoSy's builtin-in timeout

[Chris Warburton]

Not sure where this is coming from, but we don't want it to bail out
early. Here's an example output, caused by the 'nat' and 'list' tests
running simultaneously:

Exploring list theory
Sending raw equations to stderr
Exploring nat theory
Sending raw equations to stderr
### Cannot execute Poly/ML in 32bit mode (missing shared libraries for C/C++)
### Cannot execute Poly/ML in 32bit mode (missing shared libraries for C/C++)
### Using bulky 64bit version of Poly/ML instead
### Using bulky 64bit version of Poly/ML instead
No 'BEGIN OUTPUT' sentinel found. Dumping whole output:
### No line editor: "rlwrap"
> val it = (): unit
ML> ### load_lib </nix/store/3cgfvw3lqas8v9mx70cmjakafcvxpff3-polyml-5.5.2/bin/libsha1.so> : /nix/store/3cgfvw3lqas8v9mx70cmjakafcvxpff3-polyml-5.5.2/bin/libsha1.so: cannot open shared object file: No such file or directory
### Using slow ML implementation of SHA1.digest
### load_lib </nix/store/3cgfvw3lqas8v9mx70cmjakafcvxpff3-polyml-5.5.2/bin/libsha1.so> : /nix/store/3cgfvw3lqas8v9mx70cmjakafcvxpff3-polyml-5.5.2/bin/libsha1.so: cannot open shared object file: No such file or directory
### Using slow ML implementation of SHA1.digest
Loading theory "A" (required by "ISACOSY")
### theory "A"
### 355.109s elapsed time, 217.558s cpu time, 112.766s GC time
Loading theory "ISACOSY"
Testing conjecture with Quickcheck-exhaustive...
Testing conjecture with Quickcheck-exhaustive...
Testing conjecture with Quickcheck-exhaustive...
Testing conjecture with Quickcheck-exhaustive...
Synth Conjecture:
"global697361706c616e6e65722f70726f705f35322e736d7432726576
  Global6772616d6d6172732f7061636b7261745f756e616d6269675061636b7261742e736d74326e696c =
 Global6772616d6d6172732f7061636b7261745f756e616d6269675061636b7261742e736d74326e696c"
Exception trace - Timeout
List.mapPartial(2)()
DB_SynthInterface.thm_synth(11)synth_one_size(3)
DB_SynthInterface.thm_synth(11)
<top level>
CODETREE().genCode(3)(1)
COMPILER_BODY().baseCompiler(3)executeCode(1)
val functions =
   [(A.global697361706c616e6e65722f70726f705f35322e736d7432726576,
     "'local1 Global6772616d6d6172732f7061636b7261745f756e616d6269675061636b7261742e736d74326c697374
      => 'local1 Global6772616d6d6172732f7061636b7261745f756e616d6269675061636b7261742e736d74326c697374")]:
   (string * typ) list
val def_thrms =
   [["global697361706c616e6e65722f70726f705f35322e736d7432726576
       Global6772616d6d6172732f7061636b7261745f756e616d6269675061636b7261742e736d74326e696c =
      Global6772616d6d6172732f7061636b7261745f756e616d6269675061636b7261742e736d74326e696c",
     "global697361706c616e6e65722f70726f705f35322e736d7432726576
       (Global6772616d6d6172732f7061636b7261745f756e616d6269675061636b7261742e736d7432636f6e73
         ?local3.0 ?local4.0) =
      global6772616d6d6172732f7061636b7261745f756e616d6269675061636b7261742e736d7432617070656e64
       (global697361706c616e6e65722f70726f705f35322e736d7432726576
         ?local4.0)
       (Global6772616d6d6172732f7061636b7261745f756e616d6269675061636b7261742e736d7432636f6e73
         ?local3.0
         Global6772616d6d6172732f7061636b7261745f756e616d6269675061636b7261742e736d74326e696c)"]]:
   thm list list
val fundefs =
   [((A.global697361706c616e6e65722f70726f705f35322e736d7432726576,
      "'local1 Global6772616d6d6172732f7061636b7261745f756e616d6269675061636b7261742e736d74326c697374
       => 'local1 Global6772616d6d6172732f7061636b7261745f756e616d6269675061636b7261742e736d74326c697374"),
     ["global697361706c616e6e65722f70726f705f35322e736d7432726576
        Global6772616d6d6172732f7061636b7261745f756e616d6269675061636b7261742e736d74326e696c =
       Global6772616d6d6172732f7061636b7261745f756e616d6269675061636b7261742e736d74326e696c",
      "global697361706c616e6e65722f70726f705f35322e736d7432726576
        (Global6772616d6d6172732f7061636b7261745f756e616d6269675061636b7261742e736d7432636f6e73
          ?local3.0 ?local4.0) =
       global6772616d6d6172732f7061636b7261745f756e616d6269675061636b7261742e736d7432617070656e64
        (global697361706c616e6e65722f70726f705f35322e736d7432726576
          ?local4.0)
        (Global6772616d6d6172732f7061636b7261745f756e616d6269675061636b7261742e736d7432636f6e73
          ?local3.0
          Global6772616d6d6172732f7061636b7261745f756e616d6269675061636b7261742e736d74326e696c)"])]:
   ((string * typ) * thm list) list
Exception trace - Timeout

Library.setmp_thread_data(5)
ML_Context.exec(2)
Toplevel.generic_theory(1)(1)(1)
### theory "ISACOSY"
### 50.861s elapsed time, 13.157s cpu time, 5.280s GC time
*** Timeout
***
*** At command "ML" (line 6 of "/nix/store/hvhp7scm161034rcpvlwy6h8nj1dl084-merged/ISACOSY.thy")
Exception- TOPLEVEL_ERROR raised
ML>
End of dump

[]builder for â??/nix/store/spq7wv63vd67zf1wk2czc066fr2qmf19-list-runner-test.drvâ?? failed with exit code 1
cannot build derivation â??/nix/store/d5wzdar8y4qa6fdqa00i0azmwq3knl15-python-2.7.12-env.drvâ??: 1 dependencies couldn't be built