java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/Sifa.xml -i ../../../trunk/examples/programs/20181010-MemSafetyPathprograms/ArraysOfVariableLength5_true-valid-memsafety.c_10.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.24-3b9210c [2019-08-06 16:57:23,535 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-08-06 16:57:23,537 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-08-06 16:57:23,549 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-08-06 16:57:23,549 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-08-06 16:57:23,550 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-08-06 16:57:23,552 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-08-06 16:57:23,554 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-08-06 16:57:23,556 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-08-06 16:57:23,556 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-08-06 16:57:23,557 INFO L181 SettingsManager]: Resetting Symbolic Interpretation preferences to default values [2019-08-06 16:57:23,559 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-08-06 16:57:23,559 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-08-06 16:57:23,560 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-08-06 16:57:23,561 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-08-06 16:57:23,562 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-08-06 16:57:23,563 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-08-06 16:57:23,565 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-08-06 16:57:23,572 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-08-06 16:57:23,579 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-08-06 16:57:23,581 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-08-06 16:57:23,582 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-08-06 16:57:23,585 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-08-06 16:57:23,586 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-08-06 16:57:23,588 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-08-06 16:57:23,588 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-08-06 16:57:23,588 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-08-06 16:57:23,589 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-08-06 16:57:23,591 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-08-06 16:57:23,593 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-08-06 16:57:23,593 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-08-06 16:57:23,594 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-08-06 16:57:23,594 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-08-06 16:57:23,595 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-08-06 16:57:23,599 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-08-06 16:57:23,599 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-08-06 16:57:23,600 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-08-06 16:57:23,600 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-08-06 16:57:23,600 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-08-06 16:57:23,602 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-08-06 16:57:23,605 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-08-06 16:57:23,642 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-08-06 16:57:23,653 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-08-06 16:57:23,657 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-08-06 16:57:23,658 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2019-08-06 16:57:23,659 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2019-08-06 16:57:23,660 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20181010-MemSafetyPathprograms/ArraysOfVariableLength5_true-valid-memsafety.c_10.bpl [2019-08-06 16:57:23,660 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20181010-MemSafetyPathprograms/ArraysOfVariableLength5_true-valid-memsafety.c_10.bpl' [2019-08-06 16:57:23,712 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-08-06 16:57:23,713 INFO L131 ToolchainWalker]: Walking toolchain with 3 elements. [2019-08-06 16:57:23,714 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-08-06 16:57:23,714 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-08-06 16:57:23,714 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-08-06 16:57:23,733 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "ArraysOfVariableLength5_true-valid-memsafety.c_10.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 04:57:23" (1/1) ... [2019-08-06 16:57:23,734 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "ArraysOfVariableLength5_true-valid-memsafety.c_10.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 04:57:23" (1/1) ... [2019-08-06 16:57:23,744 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "ArraysOfVariableLength5_true-valid-memsafety.c_10.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 04:57:23" (1/1) ... [2019-08-06 16:57:23,745 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "ArraysOfVariableLength5_true-valid-memsafety.c_10.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 04:57:23" (1/1) ... [2019-08-06 16:57:23,749 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "ArraysOfVariableLength5_true-valid-memsafety.c_10.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 04:57:23" (1/1) ... [2019-08-06 16:57:23,751 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "ArraysOfVariableLength5_true-valid-memsafety.c_10.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 04:57:23" (1/1) ... [2019-08-06 16:57:23,752 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "ArraysOfVariableLength5_true-valid-memsafety.c_10.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 04:57:23" (1/1) ... [2019-08-06 16:57:23,755 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-08-06 16:57:23,757 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-08-06 16:57:23,757 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-08-06 16:57:23,758 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-08-06 16:57:23,759 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "ArraysOfVariableLength5_true-valid-memsafety.c_10.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 04:57:23" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-08-06 16:57:23,823 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2019-08-06 16:57:23,823 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-08-06 16:57:23,823 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-08-06 16:57:24,170 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-08-06 16:57:24,171 INFO L283 CfgBuilder]: Removed 0 assume(true) statements. [2019-08-06 16:57:24,172 INFO L202 PluginConnector]: Adding new model ArraysOfVariableLength5_true-valid-memsafety.c_10.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 04:57:24 BoogieIcfgContainer [2019-08-06 16:57:24,173 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-08-06 16:57:24,173 INFO L113 PluginConnector]: ------------------------Symbolic Interpretation---------------------------- [2019-08-06 16:57:24,173 INFO L271 PluginConnector]: Initializing Symbolic Interpretation... [2019-08-06 16:57:24,174 INFO L275 PluginConnector]: Symbolic Interpretation initialized [2019-08-06 16:57:24,175 INFO L185 PluginConnector]: Executing the observer SymbolicInterpretationObserver from plugin Symbolic Interpretation for "ArraysOfVariableLength5_true-valid-memsafety.c_10.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 04:57:24" (1/1) ... [2019-08-06 16:57:24,193 INFO L148 IcfgInterpreter]: Started Sifa with 1 locations of interest [2019-08-06 16:57:24,196 INFO L155 IcfgInterpreter]: Building call graph [2019-08-06 16:57:24,203 INFO L160 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-08-06 16:57:24,211 INFO L165 IcfgInterpreter]: Starting interpretation [2019-08-06 16:57:24,213 INFO L185 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 [2019-08-06 16:57:24,376 INFO L169 IcfgInterpreter]: Interpretation finished [2019-08-06 16:57:24,376 INFO L177 IcfgInterpreter]: Final predicates for locations of interest are: [2019-08-06 16:57:24,380 INFO L179 IcfgInterpreter]: Location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT has predicate 18#(and (<= |ULTIMATE.start_main_#t~ret3| 2147483647) (= 0 ULTIMATE.start_foo_~i~0) (= |ULTIMATE.start_main_#t~ret3| |ULTIMATE.start_foo_#res|) (= (select |#valid| |ULTIMATE.start_write~int_#ptr.base|) 1) (= ULTIMATE.start_main_~c~0.offset |ULTIMATE.start_main_~#mask~0.offset|) (= 1 (select |#valid| |ULTIMATE.start_main_~#b~0.base|)) (= (+ |ULTIMATE.start_main_~#b~0.offset| (* 4 ULTIMATE.start_main_~i~1)) |ULTIMATE.start_write~int_#ptr.offset|) (= ULTIMATE.start_main_~i~1 |ULTIMATE.start_foo_#in~size|) (= |ULTIMATE.start_write~int_#value| |ULTIMATE.start_main_#t~ret3|) (= |ULTIMATE.start_foo_#in~size| ULTIMATE.start_foo_~size) (<= 4 (+ |ULTIMATE.start_main_~#b~0.offset| (* 4 ULTIMATE.start_main_~i~1))) (= |ULTIMATE.start_write~int_#ptr.base| |ULTIMATE.start_main_~#b~0.base|) (= |ULTIMATE.start_write~int_#sizeOfWrittenType| 4) (= |ULTIMATE.start_foo_#in~b.base| ULTIMATE.start_foo_~b.base) (<= ULTIMATE.start_main_~i~1 1) (exists ((|v_ULTIMATE.start_write~int_old_#memory_int_4| (Array Int (Array Int Int)))) (and (or (and (= 0 |ULTIMATE.start_#Ultimate.alloc_#res.offset|) (= 0 |#NULL.base|) (= 0 (+ ULTIMATE.start_main_~i~1 (- 1))) (= |#valid| (store |ULTIMATE.start_#Ultimate.alloc_old_#valid| |ULTIMATE.start_#Ultimate.alloc_#res.base| 1)) (= |ULTIMATE.start_#Ultimate.alloc_#res.offset| |ULTIMATE.start_main_~#mask~0.offset|) (= |ULTIMATE.start_main_~#mask~0.base| |ULTIMATE.start_#Ultimate.alloc_#res.base|) (not (= |ULTIMATE.start_#Ultimate.alloc_#res.base| 0)) (= 0 (select |ULTIMATE.start_#Ultimate.alloc_old_#valid| |ULTIMATE.start_#Ultimate.alloc_#res.base|)) (not (= 0 |ULTIMATE.start_main_~#b~0.base|)) (exists ((|v_#valid_7| (Array Int Int))) (and (= |ULTIMATE.start_main_old_#valid| (store |v_#valid_7| 0 0)) (= |ULTIMATE.start_#Ultimate.alloc_old_#valid| (store (store |v_#valid_7| 0 0) |ULTIMATE.start_main_~#b~0.base| 1)) (= 0 (select (store |v_#valid_7| 0 0) |ULTIMATE.start_main_~#b~0.base|)))) (= (store |ULTIMATE.start_#Ultimate.alloc_old_#length| |ULTIMATE.start_#Ultimate.alloc_#res.base| |ULTIMATE.start_#Ultimate.alloc_~size|) |#length|) (= |ULTIMATE.start_main_~#b~0.offset| 0) (exists ((|v_#length_6| (Array Int Int))) (= |ULTIMATE.start_#Ultimate.alloc_old_#length| (store |v_#length_6| |ULTIMATE.start_main_~#b~0.base| 128))) (= 32 |ULTIMATE.start_#Ultimate.alloc_~size|) (= |#NULL.offset| 0)) (and (= 0 |ULTIMATE.start_#Ultimate.alloc_#res.offset|) (= 0 |#NULL.base|) (= |#valid| (store |ULTIMATE.start_#Ultimate.alloc_old_#valid| |ULTIMATE.start_#Ultimate.alloc_#res.base| 1)) (<= (+ |ULTIMATE.start_main_~#b~0.offset| 4) (select |#length| |ULTIMATE.start_main_~#b~0.base|)) (exists ((|v_ULTIMATE.start_write~int_old_#memory_int_3| (Array Int (Array Int Int)))) (= (store |v_ULTIMATE.start_write~int_old_#memory_int_3| |ULTIMATE.start_main_~#b~0.base| (store (select |v_ULTIMATE.start_write~int_old_#memory_int_3| |ULTIMATE.start_main_~#b~0.base|) |ULTIMATE.start_main_~#b~0.offset| 0)) |v_ULTIMATE.start_write~int_old_#memory_int_4|)) (<= 0 |ULTIMATE.start_main_~#b~0.offset|) (= |ULTIMATE.start_main_~#mask~0.base| |ULTIMATE.start_#Ultimate.alloc_#res.base|) (= |ULTIMATE.start_#Ultimate.alloc_#res.offset| |ULTIMATE.start_main_~#mask~0.offset|) (= 1 (select |#valid| |ULTIMATE.start_main_~#b~0.base|)) (not (= |ULTIMATE.start_#Ultimate.alloc_#res.base| 0)) (exists ((|v_#valid_7| (Array Int Int))) (and (= |ULTIMATE.start_main_old_#valid| (store |v_#valid_7| 0 0)) (= |ULTIMATE.start_#Ultimate.alloc_old_#valid| (store (store |v_#valid_7| 0 0) |ULTIMATE.start_main_~#b~0.base| 1)) (= 0 (select (store |v_#valid_7| 0 0) |ULTIMATE.start_main_~#b~0.base|)))) (= 0 (select |ULTIMATE.start_#Ultimate.alloc_old_#valid| |ULTIMATE.start_#Ultimate.alloc_#res.base|)) (not (= 0 |ULTIMATE.start_main_~#b~0.base|)) (= (store |ULTIMATE.start_#Ultimate.alloc_old_#length| |ULTIMATE.start_#Ultimate.alloc_#res.base| |ULTIMATE.start_#Ultimate.alloc_~size|) |#length|) (= |ULTIMATE.start_main_~#b~0.offset| 0) (exists ((|v_#length_6| (Array Int Int))) (= |ULTIMATE.start_#Ultimate.alloc_old_#length| (store |v_#length_6| |ULTIMATE.start_main_~#b~0.base| 128))) (= 32 |ULTIMATE.start_#Ultimate.alloc_~size|) (= |#NULL.offset| 0) (= 1 (+ ULTIMATE.start_main_~i~1 (- 1))))) (= (store |v_ULTIMATE.start_write~int_old_#memory_int_4| |ULTIMATE.start_main_~#b~0.base| (store (select |v_ULTIMATE.start_write~int_old_#memory_int_4| |ULTIMATE.start_main_~#b~0.base|) (+ |ULTIMATE.start_main_~#b~0.offset| (* 4 ULTIMATE.start_main_~i~1) (- 4)) 0)) |#memory_int|))) (< ULTIMATE.start_main_~i~1 33) (= |ULTIMATE.start_foo_#in~b.offset| ULTIMATE.start_foo_~b.offset) (< ULTIMATE.start_main_~i~1 32) (= |ULTIMATE.start_write~int_old_#memory_int| |#memory_int|) (or (not (<= 0 |ULTIMATE.start_write~int_#ptr.offset|)) (not (<= (+ |ULTIMATE.start_write~int_#sizeOfWrittenType| |ULTIMATE.start_write~int_#ptr.offset|) (select |#length| |ULTIMATE.start_write~int_#ptr.base|)))) (= |ULTIMATE.start_foo_#res| ULTIMATE.start_foo_~i~0) (= |ULTIMATE.start_main_~#mask~0.base| ULTIMATE.start_main_~c~0.base) (<= (+ |ULTIMATE.start_main_~#b~0.offset| (* 4 ULTIMATE.start_main_~i~1)) (select |#length| |ULTIMATE.start_main_~#b~0.base|)) (<= 0 (+ |ULTIMATE.start_main_#t~ret3| 2147483648)) (not (< ULTIMATE.start_foo_~i~0 ULTIMATE.start_foo_~size)) (= |ULTIMATE.start_foo_#in~b.offset| ULTIMATE.start_main_~c~0.offset) (= |ULTIMATE.start_foo_#in~b.base| ULTIMATE.start_main_~c~0.base)) [2019-08-06 16:57:24,384 WARN L88 terpretationObserver]: Some locations of interest might be reachable, see reported results. [2019-08-06 16:57:24,403 INFO L132 PluginConnector]: ------------------------ END Symbolic Interpretation---------------------------- [2019-08-06 16:57:24,412 INFO L168 Benchmark]: Toolchain (without parser) took 692.34 ms. Allocated memory is still 138.4 MB. Free memory was 106.6 MB in the beginning and 83.9 MB in the end (delta: 22.7 MB). Peak memory consumption was 22.7 MB. Max. memory is 7.1 GB. [2019-08-06 16:57:24,414 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.22 ms. Allocated memory is still 138.4 MB. Free memory was 108.0 MB in the beginning and 107.8 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2019-08-06 16:57:24,415 INFO L168 Benchmark]: Boogie Preprocessor took 41.67 ms. Allocated memory is still 138.4 MB. Free memory was 106.3 MB in the beginning and 104.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. [2019-08-06 16:57:24,416 INFO L168 Benchmark]: RCFGBuilder took 415.55 ms. Allocated memory is still 138.4 MB. Free memory was 104.1 MB in the beginning and 92.0 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 7.1 GB. [2019-08-06 16:57:24,418 INFO L168 Benchmark]: Symbolic Interpretation took 230.60 ms. Allocated memory is still 138.4 MB. Free memory was 92.0 MB in the beginning and 83.9 MB in the end (delta: 8.1 MB). Peak memory consumption was 8.1 MB. Max. memory is 7.1 GB. [2019-08-06 16:57:24,422 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.plugins.symbolicinterpretation: - UnprovableResult [Line: 117]: Unable to prove that assertion always holds Unable to prove that assertion always holds Reason: Interpreter reached this location of interest. Location might be reachable.. Possible FailurePath: * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.22 ms. Allocated memory is still 138.4 MB. Free memory was 108.0 MB in the beginning and 107.8 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * Boogie Preprocessor took 41.67 ms. Allocated memory is still 138.4 MB. Free memory was 106.3 MB in the beginning and 104.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 415.55 ms. Allocated memory is still 138.4 MB. Free memory was 104.1 MB in the beginning and 92.0 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 7.1 GB. * Symbolic Interpretation took 230.60 ms. Allocated memory is still 138.4 MB. Free memory was 92.0 MB in the beginning and 83.9 MB in the end (delta: 8.1 MB). Peak memory consumption was 8.1 MB. Max. memory is 7.1 GB. RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...