/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/weaver-benchmarks/generated/chl/time-symm.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.fs.absint-concur-c9b613c-m [2022-09-21 14:24:16,217 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-09-21 14:24:16,218 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-09-21 14:24:16,256 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-09-21 14:24:16,257 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-09-21 14:24:16,258 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-09-21 14:24:16,259 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-09-21 14:24:16,269 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-09-21 14:24:16,270 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-09-21 14:24:16,271 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-09-21 14:24:16,272 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-09-21 14:24:16,273 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-09-21 14:24:16,273 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-09-21 14:24:16,274 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-09-21 14:24:16,274 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-09-21 14:24:16,275 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-09-21 14:24:16,276 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-09-21 14:24:16,277 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-09-21 14:24:16,278 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-09-21 14:24:16,279 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-09-21 14:24:16,280 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-09-21 14:24:16,283 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-09-21 14:24:16,284 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-09-21 14:24:16,285 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-09-21 14:24:16,288 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-09-21 14:24:16,288 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-09-21 14:24:16,288 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-09-21 14:24:16,289 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-09-21 14:24:16,289 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-09-21 14:24:16,290 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-09-21 14:24:16,290 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-09-21 14:24:16,291 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-09-21 14:24:16,291 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-09-21 14:24:16,292 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-09-21 14:24:16,293 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-09-21 14:24:16,293 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-09-21 14:24:16,293 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-09-21 14:24:16,294 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-09-21 14:24:16,294 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-09-21 14:24:16,294 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-09-21 14:24:16,295 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-09-21 14:24:16,296 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 14:24:16,313 INFO L113 SettingsManager]: Loading preferences was successful [2022-09-21 14:24:16,313 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-09-21 14:24:16,313 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-09-21 14:24:16,314 INFO L138 SettingsManager]: * Log level for plugins=info [2022-09-21 14:24:16,314 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-09-21 14:24:16,314 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-09-21 14:24:16,314 INFO L138 SettingsManager]: * User list type=DISABLED [2022-09-21 14:24:16,315 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2022-09-21 14:24:16,315 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2022-09-21 14:24:16,315 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-09-21 14:24:16,315 INFO L138 SettingsManager]: * Abstract domain=OctagonDomain [2022-09-21 14:24:16,315 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-09-21 14:24:16,316 INFO L138 SettingsManager]: * sizeof long=4 [2022-09-21 14:24:16,316 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-09-21 14:24:16,316 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-09-21 14:24:16,316 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-09-21 14:24:16,316 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-09-21 14:24:16,316 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-09-21 14:24:16,316 INFO L138 SettingsManager]: * sizeof long double=12 [2022-09-21 14:24:16,316 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-09-21 14:24:16,317 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-09-21 14:24:16,317 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-09-21 14:24:16,317 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2022-09-21 14:24:16,317 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-09-21 14:24:16,317 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-09-21 14:24:16,317 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-09-21 14:24:16,317 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-09-21 14:24:16,317 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-09-21 14:24:16,318 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2022-09-21 14:24:16,318 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-09-21 14:24:16,318 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-09-21 14:24:16,531 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-09-21 14:24:16,550 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-09-21 14:24:16,552 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-09-21 14:24:16,552 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-09-21 14:24:16,553 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-09-21 14:24:16,554 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/time-symm.wvr.bpl [2022-09-21 14:24:16,554 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/time-symm.wvr.bpl' [2022-09-21 14:24:16,573 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-09-21 14:24:16,574 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-09-21 14:24:16,579 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-09-21 14:24:16,579 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-09-21 14:24:16,579 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-09-21 14:24:16,590 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "time-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.09 02:24:16" (1/1) ... [2022-09-21 14:24:16,595 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "time-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.09 02:24:16" (1/1) ... [2022-09-21 14:24:16,599 INFO L138 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-09-21 14:24:16,600 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-09-21 14:24:16,601 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-09-21 14:24:16,602 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-09-21 14:24:16,602 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-09-21 14:24:16,607 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "time-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.09 02:24:16" (1/1) ... [2022-09-21 14:24:16,607 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "time-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.09 02:24:16" (1/1) ... [2022-09-21 14:24:16,608 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "time-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.09 02:24:16" (1/1) ... [2022-09-21 14:24:16,608 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "time-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.09 02:24:16" (1/1) ... [2022-09-21 14:24:16,609 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "time-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.09 02:24:16" (1/1) ... [2022-09-21 14:24:16,610 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "time-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.09 02:24:16" (1/1) ... [2022-09-21 14:24:16,610 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "time-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.09 02:24:16" (1/1) ... [2022-09-21 14:24:16,611 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-09-21 14:24:16,612 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-09-21 14:24:16,612 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-09-21 14:24:16,612 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-09-21 14:24:16,615 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "time-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.09 02:24:16" (1/1) ... [2022-09-21 14:24:16,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-09-21 14:24:16,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-21 14:24:16,645 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 14:24:16,658 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 14:24:16,677 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-09-21 14:24:16,677 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-09-21 14:24:16,677 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-09-21 14:24:16,677 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-09-21 14:24:16,677 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-09-21 14:24:16,677 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-09-21 14:24:16,678 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-09-21 14:24:16,678 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-09-21 14:24:16,678 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-09-21 14:24:16,679 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 14:24:16,718 INFO L234 CfgBuilder]: Building ICFG [2022-09-21 14:24:16,719 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-09-21 14:24:16,779 INFO L275 CfgBuilder]: Performing block encoding [2022-09-21 14:24:16,799 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-09-21 14:24:16,799 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-09-21 14:24:16,801 INFO L202 PluginConnector]: Adding new model time-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 02:24:16 BoogieIcfgContainer [2022-09-21 14:24:16,801 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-09-21 14:24:16,813 INFO L113 PluginConnector]: ------------------------Abstract Interpretation---------------------------- [2022-09-21 14:24:16,813 INFO L271 PluginConnector]: Initializing Abstract Interpretation... [2022-09-21 14:24:16,813 INFO L275 PluginConnector]: Abstract Interpretation initialized [2022-09-21 14:24:16,814 INFO L185 PluginConnector]: Executing the observer AbstractInterpretationRcfgObserver from plugin Abstract Interpretation for "time-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 02:24:16" (1/1) ... [2022-09-21 14:24:16,855 INFO L129 ointEngineConcurrent]: Starting fixpoint engine with domain OctagonDomain (maxUnwinding=3, maxParallelStates=2) [2022-09-21 14:24:16,864 INFO L155 ointEngineConcurrent]: Starting outer Fixpoint iteration number 1 [2022-09-21 14:24:16,865 INFO L115 FixpointEngine]: Starting fixpoint engine with domain OctagonDomain (maxUnwinding=3, maxParallelStates=2) [2022-09-21 14:24:16,889 INFO L115 FixpointEngine]: Starting fixpoint engine with domain OctagonDomain (maxUnwinding=3, maxParallelStates=2) [2022-09-21 14:24:16,895 INFO L115 FixpointEngine]: Starting fixpoint engine with domain OctagonDomain (maxUnwinding=3, maxParallelStates=2) [2022-09-21 14:24:16,900 INFO L155 ointEngineConcurrent]: Starting outer Fixpoint iteration number 2 [2022-09-21 14:24:16,901 INFO L115 FixpointEngine]: Starting fixpoint engine with domain OctagonDomain (maxUnwinding=3, maxParallelStates=2) [2022-09-21 14:24:16,926 INFO L115 FixpointEngine]: Starting fixpoint engine with domain OctagonDomain (maxUnwinding=3, maxParallelStates=2) [2022-09-21 14:24:16,930 INFO L115 FixpointEngine]: Starting fixpoint engine with domain OctagonDomain (maxUnwinding=3, maxParallelStates=2) [2022-09-21 14:24:16,937 INFO L320 AbstractInterpreter]: Some error location(s) were reachable [2022-09-21 14:24:16,949 INFO L329 AbstractInterpreter]: No benchmarks available [2022-09-21 14:24:16,949 INFO L132 PluginConnector]: ------------------------ END Abstract Interpretation---------------------------- [2022-09-21 14:24:16,951 INFO L158 Benchmark]: Toolchain (without parser) took 375.85ms. Allocated memory was 183.5MB in the beginning and 293.6MB in the end (delta: 110.1MB). Free memory was 139.0MB in the beginning and 263.6MB in the end (delta: -124.6MB). There was no memory consumed. Max. memory is 8.0GB. [2022-09-21 14:24:16,951 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.13ms. Allocated memory is still 183.5MB. Free memory is still 140.0MB. There was no memory consumed. Max. memory is 8.0GB. [2022-09-21 14:24:16,952 INFO L158 Benchmark]: Boogie Procedure Inliner took 21.47ms. Allocated memory is still 183.5MB. Free memory was 138.9MB in the beginning and 137.4MB in the end (delta: 1.5MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. [2022-09-21 14:24:16,953 INFO L158 Benchmark]: Boogie Preprocessor took 9.84ms. Allocated memory is still 183.5MB. Free memory was 137.4MB in the beginning and 136.5MB in the end (delta: 946.1kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-09-21 14:24:16,954 INFO L158 Benchmark]: RCFGBuilder took 199.39ms. Allocated memory is still 183.5MB. Free memory was 136.5MB in the beginning and 156.4MB in the end (delta: -20.0MB). Peak memory consumption was 15.7MB. Max. memory is 8.0GB. [2022-09-21 14:24:16,955 INFO L158 Benchmark]: Abstract Interpretation took 136.64ms. Allocated memory was 183.5MB in the beginning and 293.6MB in the end (delta: 110.1MB). Free memory was 156.3MB in the beginning and 263.6MB in the end (delta: -107.3MB). Peak memory consumption was 2.5MB. Max. memory is 8.0GB. [2022-09-21 14:24:16,961 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 183.5MB. Free memory is still 140.0MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 21.47ms. Allocated memory is still 183.5MB. Free memory was 138.9MB in the beginning and 137.4MB in the end (delta: 1.5MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 9.84ms. Allocated memory is still 183.5MB. Free memory was 137.4MB in the beginning and 136.5MB in the end (delta: 946.1kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 199.39ms. Allocated memory is still 183.5MB. Free memory was 136.5MB in the beginning and 156.4MB in the end (delta: -20.0MB). Peak memory consumption was 15.7MB. Max. memory is 8.0GB. * Abstract Interpretation took 136.64ms. Allocated memory was 183.5MB in the beginning and 293.6MB in the end (delta: 110.1MB). Free memory was 156.3MB in the beginning and 263.6MB in the end (delta: -107.3MB). Peak memory consumption was 2.5MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: - UnprovableResult [Line: 42]: Unable to prove that assertion always holds Unable to prove that assertion always holds Reason: abstract domain could reach this error location. Possible FailurePath: [L37] FORK 0 fork 1 thread1(); [L38] FORK 0 fork 2, 2 thread2(); [L39] JOIN 0 join 1; [L40] JOIN 0 join 2, 2; [L41] 0 assume !((if cmp_4 < 0 then -1 else (if cmp_4 > 0 then 1 else 0)) == 0 - (if cmp_5 < 0 then -1 else (if cmp_5 > 0 then 1 else 0))); [L42] 0 assert false; RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-09-21 14:24:16,997 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...