我正在使用Qflow 1.1合成布局和路由数字系统，不幸的是我在阶段ABC遇到问题，synth.log输出是：
46.5.1. Executing ABC.
ERROR: ABC: execution of command "/usr/bin/berkeley-abc -s -f /tmp/yosys-abc-xvRO2o/abc.script 2>&1" failed: return code 137.
Running ABC command: <yosys-exe-dir>/berkeley-abc -s -f <abc-temp-dir>/abc.script 2>&1
ABC: ABC command line: "source <abc-temp-dir>/abc.script".
ABC:
ABC: + read_blif <abc-temp-dir>/input.blif
ABC: + read_lib -w /usr/share/qflow/tech/osu035/osu035_stdcells.lib
ABC: Parsing finished successfully. Parsing time = 0.00 sec
ABC: Scl_LibertyReadGenlib() skipped sequential cell "DFFNEGX1".
ABC: Scl_LibertyReadGenlib() skipped sequential cell "DFFPOSX1".
ABC: Scl_LibertyReadGenlib() skipped sequential cell "DFFSR".
ABC: Scl_LibertyReadGenlib() skipped sequential cell "LATCH".
ABC: Scl_LibertyReadGenlib() skipped three-state cell "PADINOUT".
ABC: Scl_LibertyReadGenlib() skipped three-state cell "TBUFX1".
ABC: Scl_LibertyReadGenlib() skipped three-state cell "TBUFX2".
ABC: Scl_LibertyReadGenlib() skipped cell "PADFC" without logic function.
ABC: Scl_LibertyReadGenlib() skipped cell "PADNC" without logic function.
ABC: Scl_LibertyReadGenlib() skipped cell "PADVDD" without logic function.
ABC: Scl_LibertyReadGenlib() skipped cell "PADGND" without logic function.
ABC: Library "osu035_stdcells" from "/usr/share/qflow/tech/osu035/osu035_stdcells.lib" has 28 cells (11 skipped: 4 seq; 3 tri-state; 4 no func). Time = 0.01 sec
ABC: Memory = 0.38 MB. Time = 0.01 sec
ABC: Warning: Detected 2 multi-output gates (for example, "FAX1").
ABC: + strash
ABC: + scorr
ABC: Error: The network is combinational (run "fraig" or "fraig_sweep").
ABC: + ifraig
ABC: + retime
ABC: + strash
ABC: + dch -f
ABC: + map -M 1
ABC: Killed
outputprep failure: No file or1200_top_mapped.blif.
Premature exit.
请问有人有任何想法解决这个问题吗？