MAYBE
Errors:
Stacktrace:

  at <unknown> <0xffffffff>
  at (wrapper managed-to-native) Microsoft.Z3.Native/LIB.Z3_fixedpoint_dec_ref (intptr,intptr) [0x00002] in <1589d34e42ba4cbeb3351b894afd3b19>:0
  at Microsoft.Z3.Native.Z3_fixedpoint_dec_ref (intptr,intptr) [0x00001] in <1589d34e42ba4cbeb3351b894afd3b19>:0
  at Microsoft.Z3.Fixedpoint/DecRefQueue.DecRef (Microsoft.Z3.Context,intptr) [0x00007] in <1589d34e42ba4cbeb3351b894afd3b19>:0
  at Microsoft.Z3.IDecRefQueue.Clear (Microsoft.Z3.Context) [0x0002b] in <1589d34e42ba4cbeb3351b894afd3b19>:0
  at Microsoft.Z3.Context.Dispose () [0x000bd] in <1589d34e42ba4cbeb3351b894afd3b19>:0
  at Microsoft.Research.T2.MuZ/MuZWrapper.CallSpacer (System.Collections.Generic.Dictionary`2<int, Microsoft.Z3.FuncDecl>,Microsoft.FSharp.Collections.FSharpList`1<System.Tuple`2<Microsoft.Z3.Quantifier, Microsoft.Z3.StringSymbol>>,Microsoft.Z3.BoolExpr) [0x0014d] in <597f493e96b5f0a0a74503833e497f59>:0
  at Microsoft.Research.T2.MuZ/MuZWrapper.Microsoft-Research-T2-SafetyInterface-SafetyProver-ErrorLocationReachable () [0x000c5] in <597f493e96b5f0a0a74503833e497f59>:0
  at Microsoft.Research.T2.Termination.prover<a_REF> (Microsoft.Research.T2.Parameters/parameters,Microsoft.Research.T2.Programs/Program,Microsoft.Research.T2.CTL/CTL_Formula,bool,Microsoft.Research.T2.Utils/SetDictionary`2<Microsoft.Research.T2.CTL/CTL_Formula, System.Tuple`2<int, Microsoft.Research.T2.Formula/formula>>,Microsoft.FSharp.Core.FSharpOption`1<System.Tuple`2<Microsoft.Research.T2.Formula/formula, Microsoft.Research.T2.Formula/formula>>,bool,bool,bool) [0x0037a] in <597f493e96b5f0a0a74503833e497f59>:0
  at Microsoft.Research.T2.Termination.bottomUp<a_REF> (Microsoft.Research.T2.Parameters/parameters,Microsoft.Research.T2.Programs/Program,Microsoft.Research.T2.CTL/CTL_Formula,bool,int,Microsoft.FSharp.Core.FSharpOption`1<System.Tuple`2<Microsoft.Research.T2.Formula/formula, Microsoft.Research.T2.Formula/formula>>,Microsoft.Research.T2.Utils/SetDictionary`2<Microsoft.Research.T2.CTL/CTL_Formula, System.Tuple`2<int, Microsoft.Research.T2.Formula/formula>>) [0x0029e] in <597f493e96b5f0a0a74503833e497f59>:0
  at Microsoft.Research.T2.Termination.bottomUpProver (Microsoft.Research.T2.Parameters/parameters,Microsoft.Research.T2.Programs/Program,Microsoft.Research.T2.CTL/CTL_Formula,bool,Microsoft.FSharp.Core.FSharpOption`1<System.Tuple`2<Microsoft.Research.T2.Formula/formula, Microsoft.Research.T2.Formula/formula>>) [0x000c2] in <597f493e96b5f0a0a74503833e497f59>:0
  at Microsoft.Research.T2.Main.main$cont@113-1 (Microsoft.Research.T2.Arguments/runMode,Microsoft.Research.T2.Parameters/parameters,string,Microsoft.Research.T2.Programs/Program,Microsoft.FSharp.Core.Unit) [0x00071] in <597f4945c11a1123a745038345497f59>:0
  at Microsoft.Research.T2.Main.main (string[]) [0x00261] in <597f4945c11a1123a745038345497f59>:0
  at (wrapper runtime-invoke) <Module>.runtime_invoke_int_object (object,intptr,intptr,intptr) [0x00054] in <597f4945c11a1123a745038345497f59>:0
/proc/self/maps:
00400000-00aec000 r-xp 00000000 fd:02 12582928                           /export/starexec/sandbox/solver/bin/T2_static
00ceb000-00cf0000 r-xp 006eb000 fd:02 12582928                           /export/starexec/sandbox/solver/bin/T2_static
00cf0000-00cf3000 rwxp 006f0000 fd:02 12582928                           /export/starexec/sandbox/solver/bin/T2_static
00cf3000-00d27000 rwxp 00000000 00:00 0 
015e7000-06abe000 rwxp 00000000 00:00 0                                  [heap]
4176b000-4177b000 rwxp 00000000 00:00 0 
419c8000-41b2b000 rwxp 00000000 00:00 0 
2b05e1191000-2b05e11b3000 r-xp 00000000 fd:01 530699                     /usr/lib64/ld-2.17.so
2b05e11b3000-2b05e11b4000 rwxp 00000000 00:00 0 
2b05e11b4000-2b05e11b5000 rwxs 00000000 00:13 226551863                  /dev/shm/mono.23244
2b05e11b5000-2b05e11d8000 rwxp 00000000 00:00 0 
2b05e11d8000-2b05e11de000 rwxp 00000000 00:00 0 
2b05e11de000-2b05e123d000 ---p 00000000 00:00 0 
2b05e123d000-2b05e1240000 rwxp 00000000 00:00 0 
2b05e1240000-2b05e12c0000 rwxp 00000000 00:00 0 
2b05e12c0000-2b05e12d7000 r-xp 00000000 fd:02 12582939                   /export/starexec/sandbox/solver/lib/System.Numerics.dll
2b05e12d7000-2b05e1329000 r-xp 00000000 fd:01 540260                     /usr/lib/mono/gac/Mono.Security/4.0.0.0__0738eb9f132ed756/Mono.Security.dll
2b05e1329000-2b05e1351000 rwxp 00000000 00:00 0 
2b05e1356000-2b05e1357000 rwxp 00000000 00:00 0 
2b05e135c000-2b05e135d000 rwxp 00000000 00:00 0 
2b05e1360000-2b05e137e000 rwxp 00000000 00:00 0 
2b05e1380000-2b05e1381000 ---p 00000000 00:00 0 
2b05e1381000-2b05e1388000 rwxp 00000000 00:00 0 
2b05e1392000-2b05e1393000 rwxp 00000000 00:00 0 
2b05e1396000-2b05e1399000 rwxp 00000000 00:00 0 
2b05e139c000-2b05e139d000 rwxp 00000000 00:00 0 
2b05e139e000-2b05e13a2000 rwxp 00000000 00:00 0 
2b05e13a5000-2b05e13a6000 rwxp 00000000 00:00 0 
2b05e13aa000-2b05e13ab000 rwxp 00000000 00:00 0 
2b05e13af000-2b05e13b0000 rwxp 00000000 00:00 0 
2b05e13b2000-2b05e13b3000 r-xp 00021000 fd:01 530699                     /usr/lib64/ld-2.17.so
2b05e13b3000-2b05e13b4000 rwxp 00022000 fd:01 530699                     /usr/lib64/ld-2.17.so
2b05e13b4000-2b05e13b5000 rwxp 00000000 00:00 0 
2b05e13b5000-2b05e14b6000 r-xp 00000000 fd:01 538693                     /usr/lib64/libm-2.17.so
2b05e14b6000-2b05e16b5000 ---p 00101000 fd:01 538693                     /usr/lib64/libm-2.17.so
2b05e16b5000-2b05e16b6000 r-xp 00100000 fd:01 538693                     /usr/lib64/libm-2.17.so
2b05e16b6000-2b05e16b7000 rwxp 00101000 fd:01 538693                     /usr/lib64/libm-2.17.so
2b05e16b7000-2b05e16be000 r-xp 00000000 fd:01 538707                     /usr/lib64/librt-2.17.so
2b05e16be000-2b05e18bd000 ---p 00007000 fd:01 538707                     /usr/lib64/librt-2.17.so
2b05e18bd000-2b05e18be000 r-xp 00006000 fd:01 538707                     /usr/lib64/librt-2.17.so
2b05e18be000-2b05e18bf000 rwxp 00007000 fd:01 538707                     /usr/lib64/librt-2.17.so
2b05e18bf000-2b05e18c1000 r-xp 00000000 fd:01 538691                     /usr/lib64/libdl-2.17.so
2b05e18c1000-2b05e1ac1000 ---p 00002000 fd:01 538691                     /usr/lib64/libdl-2.17.so
2b05e1ac1000-2b05e1ac2000 r-xp 00002000 fd:01 538691                     /usr/lib64/libdl-2.17.so
2b05e1ac2000-2b05e1ac3000 rwxp 00003000 fd:01 538691                     /usr/lib64/libdl-2.17.so
2b05e1ac3000-2b05e1ada000 r-xp 00000000 fd:01 530736                     /usr/lib64/libpthread-2.17.so
2b05e1ada000-2b05e1cd9000 ---p 00017000 fd:01 530736                     /usr/lib64/libpthread-2.17.so
2b05e1cd9000-2b05e1cda000 r-xp 00016000 fd:01 530736                     /usr/lib64/libpthread-2.17.so
2b05e1cda000-2b05e1cdb000 rwxp 00017000 fd:01 530736                     /usr/lib64/libpthread-2.17.so
2b05e1cdb000-2b05e1cdf000 rwxp 00000000 00:00 0 
2b05e1cdf000-2b05e1cf4000 r-xp 00000000 fd:01 531002                     /usr/lib64/libgcc_s-4.8.5-20150702.so.1
2b05e1cf4000-2b05e1ef3000 ---p 00015000 fd:01 531002                     /usr/lib64/libgcc_s-4.8.5-20150702.so.1
2b05e1ef3000-2b05e1ef4000 r-xp 00014000 fd:01 531002                     /usr/lib64/libgcc_s-4.8.5-20150702.so.1
2b05e1ef4000-2b05e1ef5000 rwxp 00015000 fd:01 531002                     /usr/lib64/libgcc_s-4.8.5-20150702.so.1
2b05e1ef5000-2b05e20b8000 r-xp 00000000 fd:01 530710                     /usr/lib64/libc-2.17.so
2b05e20b8000-2b05e22b7000 ---p 001c3000 fd:01 530710                     /usr/lib64/libc-2.17.so
2b05e22b7000-2b05e22bb000 r-xp 001c2000 fd:01 530710                     /usr/lib64/libc-2.17.so
2b05e22bb000-2b05e22bd000 rwxp 001c6000 fd:01 530710                     /usr/lib64/libc-2.17.so
2b05e22bd000-2b05e22c2000 rwxp 00000000 00:00 0 
2b05e22c2000-2b05e87eb000 r-xp 00000000 fd:01 18954                      /usr/lib/locale/locale-archive
2b05e87ee000-2b05e87ef000 rwxp 00000000 00:00 0 
2b05e87f1000-2b05e87f8000 rwxp 00000000 00:00 0 
2b05e87fa000-2b05e87fb000 rwxp 00000000 00:00 0 
2b05e8800000-2b05e8c00000 rwxp 00000000 00:00 0 
2b05e8c00000-2b05e8c01000 ---p 00000000 00:00 0 
2b05e8c01000-2b05e9e01000 rwxp 00000000 00:00 0 
2b05e9e01000-2b05ea1aa000 r-xp 00000000 fd:02 12582938                   /export/starexec/sandbox/solver/lib/mscorlib.dll
2b05ea1ab000-2b05ea1b3000 ---p 00000000 00:00 0 
2b05ea1b3000-2b05ea1b4000 ---p 00000000 00:00 0 
2b05ea1b4000-2b05ea1b5000 rwxp 00000000 00:00 0 
2b05ea1b5000-2b05ea1bd000 ---p 00000000 00:00 0 
2b05ea1bd000-2b05ea3d0000 rwxp 00000000 00:00 0 
2b05ea400000-2b05ea500000 rwxp 00000000 00:00 0 
2b05ea500000-2b05ea78b000 r-xp 00000000 fd:02 12582941                   /export/starexec/sandbox/solver/lib/System.dll
2b05ea78b000-2b05eb759000 r-xp 00000000 fd:02 12582940                   /export/starexec/sandbox/solver/lib/libz3.so
2b05eb759000-2b05eb959000 ---p 00fce000 fd:02 12582940                   /export/starexec/sandbox/solver/lib/libz3.so
2b05eb959000-2b05eb981000 r-xp 00fce000 fd:02 12582940                   /export/starexec/sandbox/solver/lib/libz3.so
2b05eb981000-2b05eb984000 rwxp 00ff6000 fd:02 12582940                   /export/starexec/sandbox/solver/lib/libz3.so
2b05eb984000-2b05eb986000 rwxp 00000000 00:00 0 
2b05eb986000-2b05eba6f000 r-xp 00000000 fd:01 530724                     /usr/lib64/libstdc++.so.6.0.19
2b05eba6f000-2b05ebc6e000 ---p 000e9000 fd:01 530724                     /usr/lib64/libstdc++.so.6.0.19
2b05ebc6e000-2b05ebc76000 r-xp 000e8000 fd:01 530724                     /usr/lib64/libstdc++.so.6.0.19
2b05ebc76000-2b05ebc78000 rwxp 000f0000 fd:01 530724                     /usr/lib64/libstdc++.so.6.0.19
2b05ebc78000-2b05ebc8d000 rwxp 00000000 00:00 0 
2b05ebc8d000-2b05ebcb2000 r-xp 00000000 fd:01 541203                     /usr/lib64/libgomp.so.1.0.0
2b05ebcb2000-2b05ebeb1000 ---p 00025000 fd:01 541203                     /usr/lib64/libgomp.so.1.0.0
2b05ebeb1000-2b05ebeb2000 r-xp 00024000 fd:01 541203                     /usr/lib64/libgomp.so.1.0.0
2b05ebeb2000-2b05ebeb3000 rwxp 00025000 fd:01 541203                     /usr/lib64/libgomp.so.1.0.0
2b05ebeb3000-2b05ebfaa000 r-xp 00000000 fd:02 12582936                   /export/starexec/sandbox/solver/lib/System.Core.dll
2b05ebfaa000-2b05ebfde000 rwxp 00000000 00:00 0 
2b05ec000000-2b05ec021000 rwxp 00000000 00:00 0 
2b05ec021000-2b05f0000000 ---p 00000000 00:00 0 
2b05f0000000-2b05f0280000 rwxp 00000000 00:00 0 
2b05f02a4000-2b05f0424000 rwxp 00000000 00:00 0 
2b05f0468000-2b05f0769000 rwxp 00000000 00:00 0 
2b05f076c000-2b05f08ec000 rwxp 00000000 00:00 0 
7ffd6e6d0000-7ffd6e6f1000 rwxp 00000000 00:00 0                          [stack]
7ffd6e744000-7ffd6e746000 r-xp 00000000 00:00 0                          [vdso]
ffffffffff600000-ffffffffff601000 r-xp 00000000 00:00 0                  [vsyscall]

Native stacktrace:


Unhandled Exception:
System.NullReferenceException: Object reference not set to an instance of an object
  at (wrapper managed-to-native) Microsoft.Z3.Native+LIB:Z3_fixedpoint_dec_ref (intptr,intptr)
  at Microsoft.Z3.Native.Z3_fixedpoint_dec_ref (System.IntPtr a0, System.IntPtr a1) [0x00001] in <1589d34e42ba4cbeb3351b894afd3b19>:0 
  at Microsoft.Z3.Fixedpoint+DecRefQueue.DecRef (Microsoft.Z3.Context ctx, System.IntPtr obj) [0x00007] in <1589d34e42ba4cbeb3351b894afd3b19>:0 
  at Microsoft.Z3.IDecRefQueue.Clear (Microsoft.Z3.Context ctx) [0x0002b] in <1589d34e42ba4cbeb3351b894afd3b19>:0 
  at Microsoft.Z3.Context.Dispose () [0x000bd] in <1589d34e42ba4cbeb3351b894afd3b19>:0 
  at Microsoft.Research.T2.MuZ+MuZWrapper.CallSpacer (System.Collections.Generic.Dictionary`2[TKey,TValue] locationToFuncDecl, Microsoft.FSharp.Collections.FSharpList`1[T] rules, Microsoft.Z3.BoolExpr errorQuery) [0x0014d] in <597f493e96b5f0a0a74503833e497f59>:0 
  at Microsoft.Research.T2.MuZ+MuZWrapper.Microsoft-Research-T2-SafetyInterface-SafetyProver-ErrorLocationReachable () [0x000c5] in <597f493e96b5f0a0a74503833e497f59>:0 
  at Microsoft.Research.T2.Termination.prover[a] (Microsoft.Research.T2.Parameters+parameters pars, Microsoft.Research.T2.Programs+Program p_orig, Microsoft.Research.T2.CTL+CTL_Formula f, System.Boolean termination_only, Microsoft.Research.T2.Utils+SetDictionary`2[Key,Value] precondMap, Microsoft.FSharp.Core.FSharpOption`1[T] fairness_constraint, System.Boolean existential, System.Boolean findPreconds, System.Boolean next) [0x0037a] in <597f493e96b5f0a0a74503833e497f59>:0 
  at Microsoft.Research.T2.Termination.bottomUp[a] (Microsoft.Research.T2.Parameters+parameters pars, Microsoft.Research.T2.Programs+Program p, Microsoft.Research.T2.CTL+CTL_Formula f, System.Boolean termination_only, System.Int32 nest_level, Microsoft.FSharp.Core.FSharpOption`1[T] fairness_constraint, Microsoft.Research.T2.Utils+SetDictionary`2[Key,Value] propertyMap) [0x0029e] in <597f493e96b5f0a0a74503833e497f59>:0 
  at Microsoft.Research.T2.Termination.bottomUpProver (Microsoft.Research.T2.Parameters+parameters pars, Microsoft.Research.T2.Programs+Program p, Microsoft.Research.T2.CTL+CTL_Formula f, System.Boolean termination_only, Microsoft.FSharp.Core.FSharpOption`1[T] fairness_constraint) [0x00116] in <597f493e96b5f0a0a74503833e497f59>:0 
  at Microsoft.Research.T2.Main.main$cont@113-1 (Microsoft.Research.T2.Arguments+runMode runMode, Microsoft.Research.T2.Parameters+parameters parameters, System.String fairness_constraint_string, Microsoft.Research.T2.Programs+Program p, Microsoft.FSharp.Core.Unit unitVar) [0x00071] in <597f4945c11a1123a745038345497f59>:0 
  at Microsoft.Research.T2.Main.main (System.String[] arguments) [0x00261] in <597f4945c11a1123a745038345497f59>:0 
[ERROR] FATAL UNHANDLED EXCEPTION: System.NullReferenceException: Object reference not set to an instance of an object
  at (wrapper managed-to-native) Microsoft.Z3.Native+LIB:Z3_fixedpoint_dec_ref (intptr,intptr)
  at Microsoft.Z3.Native.Z3_fixedpoint_dec_ref (System.IntPtr a0, System.IntPtr a1) [0x00001] in <1589d34e42ba4cbeb3351b894afd3b19>:0 
  at Microsoft.Z3.Fixedpoint+DecRefQueue.DecRef (Microsoft.Z3.Context ctx, System.IntPtr obj) [0x00007] in <1589d34e42ba4cbeb3351b894afd3b19>:0 
  at Microsoft.Z3.IDecRefQueue.Clear (Microsoft.Z3.Context ctx) [0x0002b] in <1589d34e42ba4cbeb3351b894afd3b19>:0 
  at Microsoft.Z3.Context.Dispose () [0x000bd] in <1589d34e42ba4cbeb3351b894afd3b19>:0 
  at Microsoft.Research.T2.MuZ+MuZWrapper.CallSpacer (System.Collections.Generic.Dictionary`2[TKey,TValue] locationToFuncDecl, Microsoft.FSharp.Collections.FSharpList`1[T] rules, Microsoft.Z3.BoolExpr errorQuery) [0x0014d] in <597f493e96b5f0a0a74503833e497f59>:0 
  at Microsoft.Research.T2.MuZ+MuZWrapper.Microsoft-Research-T2-SafetyInterface-SafetyProver-ErrorLocationReachable () [0x000c5] in <597f493e96b5f0a0a74503833e497f59>:0 
  at Microsoft.Research.T2.Termination.prover[a] (Microsoft.Research.T2.Parameters+parameters pars, Microsoft.Research.T2.Programs+Program p_orig, Microsoft.Research.T2.CTL+CTL_Formula f, System.Boolean termination_only, Microsoft.Research.T2.Utils+SetDictionary`2[Key,Value] precondMap, Microsoft.FSharp.Core.FSharpOption`1[T] fairness_constraint, System.Boolean existential, System.Boolean findPreconds, System.Boolean next) [0x0037a] in <597f493e96b5f0a0a74503833e497f59>:0 
  at Microsoft.Research.T2.Termination.bottomUp[a] (Microsoft.Research.T2.Parameters+parameters pars, Microsoft.Research.T2.Programs+Program p, Microsoft.Research.T2.CTL+CTL_Formula f, System.Boolean termination_only, System.Int32 nest_level, Microsoft.FSharp.Core.FSharpOption`1[T] fairness_constraint, Microsoft.Research.T2.Utils+SetDictionary`2[Key,Value] propertyMap) [0x0029e] in <597f493e96b5f0a0a74503833e497f59>:0 
  at Microsoft.Research.T2.Termination.bottomUpProver (Microsoft.Research.T2.Parameters+parameters pars, Microsoft.Research.T2.Programs+Program p, Microsoft.Research.T2.CTL+CTL_Formula f, System.Boolean termination_only, Microsoft.FSharp.Core.FSharpOption`1[T] fairness_constraint) [0x00116] in <597f493e96b5f0a0a74503833e497f59>:0 
  at Microsoft.Research.T2.Main.main$cont@113-1 (Microsoft.Research.T2.Arguments+runMode runMode, Microsoft.Research.T2.Parameters+parameters parameters, System.String fairness_constraint_string, Microsoft.Research.T2.Programs+Program p, Microsoft.FSharp.Core.Unit unitVar) [0x00071] in <597f4945c11a1123a745038345497f59>:0 
  at Microsoft.Research.T2.Main.main (System.String[] arguments) [0x00261] in <597f4945c11a1123a745038345497f59>:0