java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AbstractInterpretationC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain -i ../../../trunk/examples/svcomp/locks/test_locks_12.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 04:43:43,834 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 04:43:43,837 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 04:43:43,856 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 04:43:43,856 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 04:43:43,858 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 04:43:43,860 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 04:43:43,869 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 04:43:43,872 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 04:43:43,875 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 04:43:43,877 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 04:43:43,878 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 04:43:43,879 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 04:43:43,880 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 04:43:43,883 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 04:43:43,884 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 04:43:43,885 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 04:43:43,886 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 04:43:43,887 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 04:43:43,891 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 04:43:43,895 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 04:43:43,898 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 04:43:43,900 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 04:43:43,901 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 04:43:43,902 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 04:43:43,909 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 04:43:43,910 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 04:43:43,911 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 04:43:43,912 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-15 04:43:43,928 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 04:43:43,928 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 04:43:43,929 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 04:43:43,930 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 04:43:43,930 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 04:43:43,930 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 04:43:43,937 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 04:43:43,937 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 04:43:43,937 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 04:43:43,938 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 04:43:43,938 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 04:43:43,938 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 04:43:43,938 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 04:43:43,938 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 04:43:43,938 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 04:43:43,939 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 04:43:43,939 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 04:43:43,939 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 04:43:43,939 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 04:43:43,939 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 04:43:43,940 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 04:43:43,940 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 04:43:43,940 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 04:43:43,940 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 04:43:43,940 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 04:43:43,941 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 04:43:43,941 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 04:43:43,941 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 04:43:43,941 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain [2019-10-15 04:43:44,203 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 04:43:44,215 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 04:43:44,218 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 04:43:44,219 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 04:43:44,220 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 04:43:44,220 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_12.c [2019-10-15 04:43:44,278 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0d516b784/50d5da178afb4b51b1f544d32e08fc63/FLAGe40eca89a [2019-10-15 04:43:44,736 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 04:43:44,736 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_12.c [2019-10-15 04:43:44,746 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0d516b784/50d5da178afb4b51b1f544d32e08fc63/FLAGe40eca89a [2019-10-15 04:43:45,104 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0d516b784/50d5da178afb4b51b1f544d32e08fc63 [2019-10-15 04:43:45,112 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 04:43:45,113 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 04:43:45,114 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 04:43:45,114 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 04:43:45,117 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 04:43:45,118 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 04:43:45" (1/1) ... [2019-10-15 04:43:45,121 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@760969a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:43:45, skipping insertion in model container [2019-10-15 04:43:45,121 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 04:43:45" (1/1) ... [2019-10-15 04:43:45,128 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 04:43:45,151 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 04:43:45,318 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 04:43:45,322 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 04:43:45,351 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 04:43:45,446 INFO L192 MainTranslator]: Completed translation [2019-10-15 04:43:45,447 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:43:45 WrapperNode [2019-10-15 04:43:45,448 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 04:43:45,448 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 04:43:45,449 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 04:43:45,449 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 04:43:45,458 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:43:45" (1/1) ... [2019-10-15 04:43:45,459 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:43:45" (1/1) ... [2019-10-15 04:43:45,465 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:43:45" (1/1) ... [2019-10-15 04:43:45,466 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:43:45" (1/1) ... [2019-10-15 04:43:45,472 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:43:45" (1/1) ... [2019-10-15 04:43:45,487 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:43:45" (1/1) ... [2019-10-15 04:43:45,489 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:43:45" (1/1) ... [2019-10-15 04:43:45,491 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 04:43:45,492 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 04:43:45,492 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 04:43:45,492 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 04:43:45,497 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 04:43:45" (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:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 04:43:45,557 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 04:43:45,558 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 04:43:45,558 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 04:43:45,558 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 04:43:45,559 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 04:43:45,560 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 04:43:45,560 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 04:43:45,560 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 04:43:45,910 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 04:43:45,911 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 04:43:45,912 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 04:43:45 BoogieIcfgContainer [2019-10-15 04:43:45,912 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 04:43:45,913 INFO L113 PluginConnector]: ------------------------Abstract Interpretation---------------------------- [2019-10-15 04:43:45,913 INFO L271 PluginConnector]: Initializing Abstract Interpretation... [2019-10-15 04:43:45,913 INFO L275 PluginConnector]: Abstract Interpretation initialized [2019-10-15 04:43:45,914 INFO L185 PluginConnector]: Executing the observer AbstractInterpretationRcfgObserver from plugin Abstract Interpretation for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 04:43:45" (1/1) ... [2019-10-15 04:43:45,949 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-15 04:43:47,293 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-10-15 04:43:47,323 INFO L272 AbstractInterpreter]: Visited 88 different actions 1876 times. Merged at 60 different actions 898 times. Never widened. Performed 4846 root evaluator evaluations with a maximum evaluation depth of 4. Performed 4846 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 785 fixpoints after 50 different actions. Largest state had 39 variables. [2019-10-15 04:43:47,324 INFO L132 PluginConnector]: ------------------------ END Abstract Interpretation---------------------------- [2019-10-15 04:43:47,328 INFO L168 Benchmark]: Toolchain (without parser) took 2212.94 ms. Allocated memory was 138.4 MB in the beginning and 248.5 MB in the end (delta: 110.1 MB). Free memory was 101.6 MB in the beginning and 115.0 MB in the end (delta: -13.4 MB). Peak memory consumption was 96.7 MB. Max. memory is 7.1 GB. [2019-10-15 04:43:47,329 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 138.4 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-10-15 04:43:47,330 INFO L168 Benchmark]: CACSL2BoogieTranslator took 334.49 ms. Allocated memory was 138.4 MB in the beginning and 202.9 MB in the end (delta: 64.5 MB). Free memory was 101.4 MB in the beginning and 182.1 MB in the end (delta: -80.7 MB). Peak memory consumption was 24.3 MB. Max. memory is 7.1 GB. [2019-10-15 04:43:47,332 INFO L168 Benchmark]: Boogie Preprocessor took 42.85 ms. Allocated memory is still 202.9 MB. Free memory was 182.1 MB in the beginning and 179.7 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. [2019-10-15 04:43:47,334 INFO L168 Benchmark]: RCFGBuilder took 420.84 ms. Allocated memory is still 202.9 MB. Free memory was 179.7 MB in the beginning and 159.2 MB in the end (delta: 20.5 MB). Peak memory consumption was 20.5 MB. Max. memory is 7.1 GB. [2019-10-15 04:43:47,335 INFO L168 Benchmark]: Abstract Interpretation took 1411.26 ms. Allocated memory was 202.9 MB in the beginning and 248.5 MB in the end (delta: 45.6 MB). Free memory was 159.2 MB in the beginning and 115.0 MB in the end (delta: 44.2 MB). Peak memory consumption was 89.8 MB. Max. memory is 7.1 GB. [2019-10-15 04:43:47,346 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 138.4 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 334.49 ms. Allocated memory was 138.4 MB in the beginning and 202.9 MB in the end (delta: 64.5 MB). Free memory was 101.4 MB in the beginning and 182.1 MB in the end (delta: -80.7 MB). Peak memory consumption was 24.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 42.85 ms. Allocated memory is still 202.9 MB. Free memory was 182.1 MB in the beginning and 179.7 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 420.84 ms. Allocated memory is still 202.9 MB. Free memory was 179.7 MB in the beginning and 159.2 MB in the end (delta: 20.5 MB). Peak memory consumption was 20.5 MB. Max. memory is 7.1 GB. * Abstract Interpretation took 1411.26 ms. Allocated memory was 202.9 MB in the beginning and 248.5 MB in the end (delta: 45.6 MB). Free memory was 159.2 MB in the beginning and 115.0 MB in the end (delta: 44.2 MB). Peak memory consumption was 89.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: - UnprovableResult [Line: 189]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: abstract domain could reach this error location. Possible FailurePath: [L6] int p1 = __VERIFIER_nondet_int(); [L7] int lk1; [L9] int p2 = __VERIFIER_nondet_int(); [L10] int lk2; [L12] int p3 = __VERIFIER_nondet_int(); [L13] int lk3; [L15] int p4 = __VERIFIER_nondet_int(); [L16] int lk4; [L18] int p5 = __VERIFIER_nondet_int(); [L19] int lk5; [L21] int p6 = __VERIFIER_nondet_int(); [L22] int lk6; [L24] int p7 = __VERIFIER_nondet_int(); [L25] int lk7; [L27] int p8 = __VERIFIER_nondet_int(); [L28] int lk8; [L30] int p9 = __VERIFIER_nondet_int(); [L31] int lk9; [L33] int p10 = __VERIFIER_nondet_int(); [L34] int lk10; [L36] int p11 = __VERIFIER_nondet_int(); [L37] int lk11; [L39] int p12 = __VERIFIER_nondet_int(); [L40] int lk12; [L43] int cond; [L45] COND TRUE 1 [L46] cond = __VERIFIER_nondet_int() [L47] COND FALSE !(cond == 0) [L50] lk1 = 0 [L52] lk2 = 0 [L54] lk3 = 0 [L56] lk4 = 0 [L58] lk5 = 0 [L60] lk6 = 0 [L62] lk7 = 0 [L64] lk8 = 0 [L66] lk9 = 0 [L68] lk10 = 0 [L70] lk11 = 0 [L72] lk12 = 0 [L76] COND FALSE !(p1 != 0) [L80] COND TRUE p2 != 0 [L81] lk2 = 1 [L84] COND TRUE p3 != 0 [L85] lk3 = 1 [L88] COND TRUE p4 != 0 [L89] lk4 = 1 [L92] COND TRUE p5 != 0 [L93] lk5 = 1 [L96] COND TRUE p6 != 0 [L97] lk6 = 1 [L100] COND TRUE p7 != 0 [L101] lk7 = 1 [L104] COND FALSE !(p8 != 0) [L108] COND TRUE p9 != 0 [L109] lk9 = 1 [L112] COND TRUE p10 != 0 [L113] lk10 = 1 [L116] COND TRUE p11 != 0 [L117] lk11 = 1 [L120] COND TRUE p12 != 0 [L121] lk12 = 1 [L126] COND TRUE p1 != 0 [L127] COND TRUE lk1 != 1 [L189] __VERIFIER_error() RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...