/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AbstractInterpretationInline.xml -s ../../../trunk/examples/settings/ai/thread-modular/svcomp-Reach-32bit-Automizer_Default+AIv2_OCT_FLOW_INSENSITIVE.epf -i ../../../trunk/examples/concurrent/bpl/regression/JoinTheForkingThread.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.fs.absint-concur-c9b613c-m [2022-09-21 14:23:15,940 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-09-21 14:23:15,942 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-09-21 14:23:15,974 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-09-21 14:23:15,974 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-09-21 14:23:15,975 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-09-21 14:23:15,976 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-09-21 14:23:15,978 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-09-21 14:23:15,979 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-09-21 14:23:15,980 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-09-21 14:23:15,980 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-09-21 14:23:15,981 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-09-21 14:23:15,982 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-09-21 14:23:15,983 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-09-21 14:23:15,983 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-09-21 14:23:15,984 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-09-21 14:23:15,985 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-09-21 14:23:15,986 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-09-21 14:23:15,987 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-09-21 14:23:15,989 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-09-21 14:23:15,990 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-09-21 14:23:15,991 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-09-21 14:23:15,992 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-09-21 14:23:15,993 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-09-21 14:23:15,995 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-09-21 14:23:15,996 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-09-21 14:23:15,996 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-09-21 14:23:15,997 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-09-21 14:23:15,997 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-09-21 14:23:15,998 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-09-21 14:23:15,998 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-09-21 14:23:15,999 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-09-21 14:23:15,999 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-09-21 14:23:16,000 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-09-21 14:23:16,001 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-09-21 14:23:16,001 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-09-21 14:23:16,002 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-09-21 14:23:16,002 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-09-21 14:23:16,002 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-09-21 14:23:16,010 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-09-21 14:23:16,010 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-09-21 14:23:16,011 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/thread-modular/svcomp-Reach-32bit-Automizer_Default+AIv2_OCT_FLOW_INSENSITIVE.epf [2022-09-21 14:23:16,033 INFO L113 SettingsManager]: Loading preferences was successful [2022-09-21 14:23:16,033 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-09-21 14:23:16,033 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-09-21 14:23:16,033 INFO L138 SettingsManager]: * Log level for plugins=info [2022-09-21 14:23:16,034 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-09-21 14:23:16,034 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-09-21 14:23:16,034 INFO L138 SettingsManager]: * User list type=DISABLED [2022-09-21 14:23:16,034 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2022-09-21 14:23:16,034 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2022-09-21 14:23:16,035 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-09-21 14:23:16,035 INFO L138 SettingsManager]: * Abstract domain=OctagonDomain [2022-09-21 14:23:16,035 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-09-21 14:23:16,035 INFO L138 SettingsManager]: * sizeof long=4 [2022-09-21 14:23:16,036 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-09-21 14:23:16,036 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-09-21 14:23:16,036 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-09-21 14:23:16,036 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-09-21 14:23:16,036 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-09-21 14:23:16,036 INFO L138 SettingsManager]: * sizeof long double=12 [2022-09-21 14:23:16,036 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-09-21 14:23:16,037 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-09-21 14:23:16,037 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-09-21 14:23:16,037 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2022-09-21 14:23:16,037 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-09-21 14:23:16,037 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-09-21 14:23:16,037 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-09-21 14:23:16,038 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-09-21 14:23:16,038 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-09-21 14:23:16,038 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2022-09-21 14:23:16,038 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-09-21 14:23:16,038 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-09-21 14:23:16,231 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-09-21 14:23:16,249 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-09-21 14:23:16,251 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-09-21 14:23:16,251 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-09-21 14:23:16,252 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-09-21 14:23:16,253 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/JoinTheForkingThread.bpl [2022-09-21 14:23:16,253 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/JoinTheForkingThread.bpl' [2022-09-21 14:23:16,273 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-09-21 14:23:16,274 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-09-21 14:23:16,275 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-09-21 14:23:16,275 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-09-21 14:23:16,275 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-09-21 14:23:16,284 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "JoinTheForkingThread.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.09 02:23:16" (1/1) ... [2022-09-21 14:23:16,289 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "JoinTheForkingThread.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.09 02:23:16" (1/1) ... [2022-09-21 14:23:16,293 INFO L138 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-09-21 14:23:16,294 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-09-21 14:23:16,295 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-09-21 14:23:16,295 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-09-21 14:23:16,295 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-09-21 14:23:16,301 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "JoinTheForkingThread.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.09 02:23:16" (1/1) ... [2022-09-21 14:23:16,301 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "JoinTheForkingThread.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.09 02:23:16" (1/1) ... [2022-09-21 14:23:16,301 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "JoinTheForkingThread.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.09 02:23:16" (1/1) ... [2022-09-21 14:23:16,302 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "JoinTheForkingThread.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.09 02:23:16" (1/1) ... [2022-09-21 14:23:16,303 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "JoinTheForkingThread.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.09 02:23:16" (1/1) ... [2022-09-21 14:23:16,303 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "JoinTheForkingThread.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.09 02:23:16" (1/1) ... [2022-09-21 14:23:16,304 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "JoinTheForkingThread.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.09 02:23:16" (1/1) ... [2022-09-21 14:23:16,305 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-09-21 14:23:16,305 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-09-21 14:23:16,305 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-09-21 14:23:16,305 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-09-21 14:23:16,307 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "JoinTheForkingThread.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.09 02:23:16" (1/1) ... [2022-09-21 14:23:16,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-09-21 14:23:16,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-21 14:23:16,335 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-09-21 14:23:16,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-09-21 14:23:16,369 INFO L124 BoogieDeclarations]: Specification and implementation of procedure bar given in one single declaration [2022-09-21 14:23:16,370 INFO L130 BoogieDeclarations]: Found specification of procedure bar [2022-09-21 14:23:16,370 INFO L138 BoogieDeclarations]: Found implementation of procedure bar [2022-09-21 14:23:16,370 INFO L124 BoogieDeclarations]: Specification and implementation of procedure foo given in one single declaration [2022-09-21 14:23:16,370 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2022-09-21 14:23:16,370 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2022-09-21 14:23:16,370 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-09-21 14:23:16,370 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-09-21 14:23:16,370 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-09-21 14:23:16,371 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-09-21 14:23:16,402 INFO L234 CfgBuilder]: Building ICFG [2022-09-21 14:23:16,403 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-09-21 14:23:16,475 INFO L275 CfgBuilder]: Performing block encoding [2022-09-21 14:23:16,482 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-09-21 14:23:16,483 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-09-21 14:23:16,495 INFO L202 PluginConnector]: Adding new model JoinTheForkingThread.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 02:23:16 BoogieIcfgContainer [2022-09-21 14:23:16,497 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-09-21 14:23:16,499 INFO L113 PluginConnector]: ------------------------Abstract Interpretation---------------------------- [2022-09-21 14:23:16,500 INFO L271 PluginConnector]: Initializing Abstract Interpretation... [2022-09-21 14:23:16,500 INFO L275 PluginConnector]: Abstract Interpretation initialized [2022-09-21 14:23:16,501 INFO L185 PluginConnector]: Executing the observer AbstractInterpretationRcfgObserver from plugin Abstract Interpretation for "JoinTheForkingThread.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 02:23:16" (1/1) ... [2022-09-21 14:23:16,571 INFO L129 ointEngineConcurrent]: Starting fixpoint engine with domain OctagonDomain (maxUnwinding=3, maxParallelStates=2) [2022-09-21 14:23:16,573 INFO L155 ointEngineConcurrent]: Starting outer Fixpoint iteration number 1 [2022-09-21 14:23:16,573 INFO L115 FixpointEngine]: Starting fixpoint engine with domain OctagonDomain (maxUnwinding=3, maxParallelStates=2) [2022-09-21 14:23:16,602 INFO L115 FixpointEngine]: Starting fixpoint engine with domain OctagonDomain (maxUnwinding=3, maxParallelStates=2) [2022-09-21 14:23:16,609 INFO L115 FixpointEngine]: Starting fixpoint engine with domain OctagonDomain (maxUnwinding=3, maxParallelStates=2) [2022-09-21 14:23:16,610 INFO L155 ointEngineConcurrent]: Starting outer Fixpoint iteration number 2 [2022-09-21 14:23:16,610 INFO L115 FixpointEngine]: Starting fixpoint engine with domain OctagonDomain (maxUnwinding=3, maxParallelStates=2) [2022-09-21 14:23:16,641 INFO L115 FixpointEngine]: Starting fixpoint engine with domain OctagonDomain (maxUnwinding=3, maxParallelStates=2) [2022-09-21 14:23:16,647 INFO L320 AbstractInterpreter]: Some error location(s) were reachable [2022-09-21 14:23:16,658 INFO L329 AbstractInterpreter]: No benchmarks available [2022-09-21 14:23:16,658 INFO L132 PluginConnector]: ------------------------ END Abstract Interpretation---------------------------- [2022-09-21 14:23:16,661 INFO L158 Benchmark]: Toolchain (without parser) took 385.15ms. Allocated memory was 178.3MB in the beginning and 252.7MB in the end (delta: 74.4MB). Free memory was 130.8MB in the beginning and 221.9MB in the end (delta: -91.2MB). There was no memory consumed. Max. memory is 8.0GB. [2022-09-21 14:23:16,662 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.13ms. Allocated memory is still 178.3MB. Free memory is still 131.8MB. There was no memory consumed. Max. memory is 8.0GB. [2022-09-21 14:23:16,663 INFO L158 Benchmark]: Boogie Procedure Inliner took 19.66ms. Allocated memory is still 178.3MB. Free memory was 130.7MB in the beginning and 129.1MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-09-21 14:23:16,664 INFO L158 Benchmark]: Boogie Preprocessor took 9.49ms. Allocated memory is still 178.3MB. Free memory was 129.1MB in the beginning and 128.3MB in the end (delta: 845.2kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-09-21 14:23:16,665 INFO L158 Benchmark]: RCFGBuilder took 191.61ms. Allocated memory is still 178.3MB. Free memory was 128.3MB in the beginning and 149.3MB in the end (delta: -21.0MB). Peak memory consumption was 14.7MB. Max. memory is 8.0GB. [2022-09-21 14:23:16,666 INFO L158 Benchmark]: Abstract Interpretation took 159.28ms. Allocated memory was 178.3MB in the beginning and 252.7MB in the end (delta: 74.4MB). Free memory was 149.2MB in the beginning and 221.9MB in the end (delta: -72.8MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-09-21 14:23:16,673 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.13ms. Allocated memory is still 178.3MB. Free memory is still 131.8MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 19.66ms. Allocated memory is still 178.3MB. Free memory was 130.7MB in the beginning and 129.1MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 9.49ms. Allocated memory is still 178.3MB. Free memory was 129.1MB in the beginning and 128.3MB in the end (delta: 845.2kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 191.61ms. Allocated memory is still 178.3MB. Free memory was 128.3MB in the beginning and 149.3MB in the end (delta: -21.0MB). Peak memory consumption was 14.7MB. Max. memory is 8.0GB. * Abstract Interpretation took 159.28ms. Allocated memory was 178.3MB in the beginning and 252.7MB in the end (delta: 74.4MB). Free memory was 149.2MB in the beginning and 221.9MB in the end (delta: -72.8MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: - UnprovableResult [Line: 45]: Unable to prove that assertion always holds Unable to prove that assertion always holds Reason: abstract domain could reach this error location. Possible FailurePath: [L40] 0 res := 23; [L44] JOIN 0 join nondet assign localVar; [L45] 0 assert false; - UnprovableResult [Line: 23]: Unable to prove that assertion always holds Unable to prove that assertion always holds Reason: abstract domain could reach this error location. Possible FailurePath: [L17] 0 x := 0; [L18] 0 g := 0; [L20] FORK 0 fork 1 foo(x); [L21] JOIN 0 join 2; [L23] 0 assert g == 0; RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-09-21 14:23:16,714 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...