./Ultimate.py --spec ../sv-benchmarks/c/properties/no-data-race.prp --file ../sv-benchmarks/c/pthread-complex/elimination_backoff_stack.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for data races Using default analysis Version e2fb8bed Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/pthread-complex/elimination_backoff_stack.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DataRace-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! data-race) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0a77b23de3110741cf9e339cfb9f72e965f6bc6bc082cff0044fedc6c4916cfb --- Real Ultimate output --- This is Ultimate 0.3.0-?-e2fb8be-m [2025-03-08 21:53:09,263 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-08 21:53:09,322 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DataRace-32bit-Automizer_Default.epf [2025-03-08 21:53:09,325 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-08 21:53:09,325 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-08 21:53:09,337 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-08 21:53:09,338 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-08 21:53:09,338 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-08 21:53:09,338 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-08 21:53:09,338 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-08 21:53:09,338 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-08 21:53:09,338 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-08 21:53:09,338 INFO L153 SettingsManager]: * Use SBE=true [2025-03-08 21:53:09,338 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-08 21:53:09,339 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-08 21:53:09,339 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-08 21:53:09,339 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-08 21:53:09,339 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-08 21:53:09,339 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-08 21:53:09,339 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-08 21:53:09,339 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-08 21:53:09,339 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-08 21:53:09,339 INFO L153 SettingsManager]: * Check absence of data races in concurrent programs=true [2025-03-08 21:53:09,339 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-03-08 21:53:09,339 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-08 21:53:09,339 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-08 21:53:09,339 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-08 21:53:09,339 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-08 21:53:09,339 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-08 21:53:09,339 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-08 21:53:09,339 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-08 21:53:09,339 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 21:53:09,339 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-08 21:53:09,340 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-08 21:53:09,340 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-08 21:53:09,340 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-08 21:53:09,340 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-08 21:53:09,340 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-08 21:53:09,340 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-08 21:53:09,340 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-08 21:53:09,340 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-08 21:53:09,340 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-08 21:53:09,340 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! data-race) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0a77b23de3110741cf9e339cfb9f72e965f6bc6bc082cff0044fedc6c4916cfb [2025-03-08 21:53:09,557 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-08 21:53:09,566 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-08 21:53:09,567 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-08 21:53:09,568 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-08 21:53:09,568 INFO L274 PluginConnector]: CDTParser initialized [2025-03-08 21:53:09,570 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-complex/elimination_backoff_stack.i [2025-03-08 21:53:10,720 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/39aa807a0/1bc878d31c22466a9f4c810d46723cbc/FLAG5a7954198 [2025-03-08 21:53:11,070 INFO L384 CDTParser]: Found 1 translation units. [2025-03-08 21:53:11,071 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-complex/elimination_backoff_stack.i [2025-03-08 21:53:11,094 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/39aa807a0/1bc878d31c22466a9f4c810d46723cbc/FLAG5a7954198 [2025-03-08 21:53:11,289 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/39aa807a0/1bc878d31c22466a9f4c810d46723cbc [2025-03-08 21:53:11,291 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-08 21:53:11,292 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-08 21:53:11,293 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-08 21:53:11,293 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-08 21:53:11,295 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-08 21:53:11,296 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 09:53:11" (1/1) ... [2025-03-08 21:53:11,296 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a62e92c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 09:53:11, skipping insertion in model container [2025-03-08 21:53:11,297 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.03 09:53:11" (1/1) ... [2025-03-08 21:53:11,327 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-08 21:53:11,821 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 21:53:11,833 INFO L200 MainTranslator]: Completed pre-run [2025-03-08 21:53:11,916 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-08 21:53:11,979 INFO L204 MainTranslator]: Completed translation [2025-03-08 21:53:11,979 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 09:53:11 WrapperNode [2025-03-08 21:53:11,980 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-08 21:53:11,981 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-08 21:53:11,981 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-08 21:53:11,981 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-08 21:53:11,986 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 09:53:11" (1/1) ... [2025-03-08 21:53:12,005 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 09:53:11" (1/1) ... [2025-03-08 21:53:12,216 INFO L138 Inliner]: procedures = 396, calls = 207, calls flagged for inlining = 53, calls inlined = 218, statements flattened = 7615 [2025-03-08 21:53:12,217 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-08 21:53:12,217 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-08 21:53:12,218 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-08 21:53:12,218 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-08 21:53:12,223 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 09:53:11" (1/1) ... [2025-03-08 21:53:12,223 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 09:53:11" (1/1) ... [2025-03-08 21:53:12,287 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 09:53:11" (1/1) ... [2025-03-08 21:53:12,288 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 09:53:11" (1/1) ... [2025-03-08 21:53:12,485 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 09:53:11" (1/1) ... [2025-03-08 21:53:12,504 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 09:53:11" (1/1) ... [2025-03-08 21:53:12,527 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 09:53:11" (1/1) ... [2025-03-08 21:53:12,546 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 09:53:11" (1/1) ... [2025-03-08 21:53:12,577 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-08 21:53:12,578 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-08 21:53:12,579 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-08 21:53:12,579 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-08 21:53:12,579 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 09:53:11" (1/1) ... [2025-03-08 21:53:12,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-08 21:53:12,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-08 21:53:12,606 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-03-08 21:53:12,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-03-08 21:53:12,626 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-03-08 21:53:12,626 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-03-08 21:53:12,626 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2025-03-08 21:53:12,626 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-08 21:53:12,626 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2025-03-08 21:53:12,626 INFO L130 BoogieDeclarations]: Found specification of procedure instrPush2 [2025-03-08 21:53:12,626 INFO L138 BoogieDeclarations]: Found implementation of procedure instrPush2 [2025-03-08 21:53:12,626 INFO L130 BoogieDeclarations]: Found specification of procedure instrPush1 [2025-03-08 21:53:12,626 INFO L138 BoogieDeclarations]: Found implementation of procedure instrPush1 [2025-03-08 21:53:12,627 INFO L130 BoogieDeclarations]: Found specification of procedure instrPush0 [2025-03-08 21:53:12,627 INFO L138 BoogieDeclarations]: Found implementation of procedure instrPush0 [2025-03-08 21:53:12,627 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-08 21:53:12,627 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-08 21:53:12,627 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2025-03-08 21:53:12,627 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2025-03-08 21:53:12,627 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2025-03-08 21:53:12,627 INFO L130 BoogieDeclarations]: Found specification of procedure instrPop5 [2025-03-08 21:53:12,627 INFO L138 BoogieDeclarations]: Found implementation of procedure instrPop5 [2025-03-08 21:53:12,627 INFO L130 BoogieDeclarations]: Found specification of procedure instrPop6 [2025-03-08 21:53:12,627 INFO L138 BoogieDeclarations]: Found implementation of procedure instrPop6 [2025-03-08 21:53:12,627 INFO L130 BoogieDeclarations]: Found specification of procedure instrPop3 [2025-03-08 21:53:12,627 INFO L138 BoogieDeclarations]: Found implementation of procedure instrPop3 [2025-03-08 21:53:12,627 INFO L130 BoogieDeclarations]: Found specification of procedure instrPop4 [2025-03-08 21:53:12,628 INFO L138 BoogieDeclarations]: Found implementation of procedure instrPop4 [2025-03-08 21:53:12,628 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2025-03-08 21:53:12,630 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-03-08 21:53:12,968 INFO L256 CfgBuilder]: Building ICFG [2025-03-08 21:53:12,970 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-08 21:53:14,264 INFO L1307 $ProcedureCfgBuilder]: dead code at ProgramPoint L1463: havoc TryPerformStackOp_~i~2#1; [2025-03-08 21:53:14,265 INFO L1307 $ProcedureCfgBuilder]: dead code at ProgramPoint L1463-10: havoc TryPerformStackOp_~i~2#1; [2025-03-08 21:53:15,143 INFO L1307 $ProcedureCfgBuilder]: dead code at ProgramPoint L1463: havoc TryPerformStackOp_~i~2#1; [2025-03-08 21:53:15,143 INFO L1307 $ProcedureCfgBuilder]: dead code at ProgramPoint L1463-10: havoc TryPerformStackOp_~i~2#1; [2025-03-08 21:53:15,930 INFO L1307 $ProcedureCfgBuilder]: dead code at ProgramPoint L1463: havoc TryPerformStackOp_~i~2#1; [2025-03-08 21:53:15,931 INFO L1307 $ProcedureCfgBuilder]: dead code at ProgramPoint L1463-10: havoc TryPerformStackOp_~i~2#1; [2025-03-08 21:53:16,603 INFO L1307 $ProcedureCfgBuilder]: dead code at ProgramPoint L1463: havoc TryPerformStackOp_~i~2#1; [2025-03-08 21:53:16,603 INFO L1307 $ProcedureCfgBuilder]: dead code at ProgramPoint L1463-10: havoc TryPerformStackOp_~i~2#1; [2025-03-08 21:53:17,321 INFO L1307 $ProcedureCfgBuilder]: dead code at ProgramPoint L1463: havoc TryPerformStackOp_~i~2#1; [2025-03-08 21:53:17,321 INFO L1307 $ProcedureCfgBuilder]: dead code at ProgramPoint L1463-10: havoc TryPerformStackOp_~i~2#1; [2025-03-08 21:53:17,979 INFO L1307 $ProcedureCfgBuilder]: dead code at ProgramPoint L1463: havoc TryPerformStackOp_~i~2#1; [2025-03-08 21:53:17,979 INFO L1307 $ProcedureCfgBuilder]: dead code at ProgramPoint L1463-10: havoc TryPerformStackOp_~i~2#1; [2025-03-08 21:53:18,624 INFO L1307 $ProcedureCfgBuilder]: dead code at ProgramPoint L1463: havoc TryPerformStackOp_~i~2#1; [2025-03-08 21:53:18,624 INFO L1307 $ProcedureCfgBuilder]: dead code at ProgramPoint L1463-10: havoc TryPerformStackOp_~i~2#1; [2025-03-08 21:53:18,680 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-08 21:53:18,680 INFO L307 CfgBuilder]: Performing block encoding [2025-03-08 21:53:23,829 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-08 21:53:23,829 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-08 21:53:23,830 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 09:53:23 BoogieIcfgContainer [2025-03-08 21:53:23,830 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-08 21:53:23,831 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-08 21:53:23,831 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-08 21:53:23,835 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-08 21:53:23,835 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.03 09:53:11" (1/3) ... [2025-03-08 21:53:23,835 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43ee71d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 09:53:23, skipping insertion in model container [2025-03-08 21:53:23,835 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.03 09:53:11" (2/3) ... [2025-03-08 21:53:23,836 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43ee71d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.03 09:53:23, skipping insertion in model container [2025-03-08 21:53:23,836 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.03 09:53:23" (3/3) ... [2025-03-08 21:53:23,836 INFO L128 eAbstractionObserver]: Analyzing ICFG elimination_backoff_stack.i [2025-03-08 21:53:23,847 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-08 21:53:23,849 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG elimination_backoff_stack.i that has 8 procedures, 4482 locations, 1 initial locations, 0 loop locations, and 621 error locations. [2025-03-08 21:53:23,849 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-08 21:53:25,506 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-03-08 21:53:25,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 4503 places, 4628 transitions, 9284 flow [2025-03-08 21:53:33,026 INFO L124 PetriNetUnfolderBase]: 147/4621 cut-off events. [2025-03-08 21:53:33,027 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-03-08 21:53:33,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4643 conditions, 4621 events. 147/4621 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 35746 event pairs, 0 based on Foata normal form. 0/3853 useless extension candidates. Maximal degree in co-relation 4548. Up to 6 conditions per place. [2025-03-08 21:53:33,428 INFO L82 GeneralOperation]: Start removeDead. Operand has 4503 places, 4628 transitions, 9284 flow [2025-03-08 21:53:33,717 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 4496 places, 4621 transitions, 9263 flow [2025-03-08 21:53:33,723 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-08 21:53:33,734 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@6d1cde50, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-08 21:53:33,734 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1248 error locations. [2025-03-08 21:53:33,745 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-08 21:53:33,746 INFO L124 PetriNetUnfolderBase]: 0/71 cut-off events. [2025-03-08 21:53:33,746 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-03-08 21:53:33,747 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-08 21:53:33,747 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-08 21:53:33,748 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONDATA_RACE === [instrPop3Err88ASSERT_VIOLATIONDATA_RACE, instrPop3Err87ASSERT_VIOLATIONDATA_RACE, instrPop3Err86ASSERT_VIOLATIONDATA_RACE (and 1245 more)] === [2025-03-08 21:53:33,751 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-08 21:53:33,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1529371515, now seen corresponding path program 1 times [2025-03-08 21:53:33,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-08 21:53:33,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797063143] [2025-03-08 21:53:33,758 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-08 21:53:33,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-08 21:53:33,869 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 71 statements into 1 equivalence classes. [2025-03-08 21:53:33,918 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 71 of 71 statements. [2025-03-08 21:53:33,919 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-08 21:53:33,919 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-08 21:53:34,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-08 21:53:34,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-08 21:53:34,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797063143] [2025-03-08 21:53:34,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797063143] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-08 21:53:34,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-08 21:53:34,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-08 21:53:34,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532915726] [2025-03-08 21:53:34,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-08 21:53:34,670 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-08 21:53:34,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-08 21:53:34,691 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-08 21:53:34,692 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2025-03-08 21:53:37,820 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 3027 out of 4628 [2025-03-08 21:53:37,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 4496 places, 4621 transitions, 9263 flow. Second operand has 6 states, 6 states have (on average 3028.3333333333335) internal successors, (18170), 6 states have internal predecessors, (18170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-08 21:53:37,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-08 21:53:37,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3027 of 4628 [2025-03-08 21:53:37,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand