./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/no-data-race.prp --file ../../../trunk/examples/svcomp/pthread-complex/elimination_backoff_stack-race.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for data races Using default analysis Version da043454 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 ../../../trunk/examples/svcomp/pthread-complex/elimination_backoff_stack-race.c -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 163286fa0ca6ecf125dadbd9d2d7fa4d47b54b6bd58ecb755c83db237c833242 --- Real Ultimate output --- This is Ultimate 0.3.0-wip.fs.system-includes-da04345-m [2025-04-29 11:10:35,942 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-04-29 11:10:35,993 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DataRace-32bit-Automizer_Default.epf [2025-04-29 11:10:36,000 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-04-29 11:10:36,000 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-04-29 11:10:36,018 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-04-29 11:10:36,019 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-04-29 11:10:36,019 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-04-29 11:10:36,019 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-04-29 11:10:36,019 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-04-29 11:10:36,020 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-04-29 11:10:36,020 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-04-29 11:10:36,020 INFO L153 SettingsManager]: * Use SBE=true [2025-04-29 11:10:36,020 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-04-29 11:10:36,021 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-04-29 11:10:36,021 INFO L153 SettingsManager]: * sizeof long=4 [2025-04-29 11:10:36,021 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-04-29 11:10:36,021 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-04-29 11:10:36,021 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-04-29 11:10:36,021 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-04-29 11:10:36,021 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-04-29 11:10:36,021 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-04-29 11:10:36,021 INFO L153 SettingsManager]: * Check absence of data races in concurrent programs=true [2025-04-29 11:10:36,021 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-04-29 11:10:36,022 INFO L153 SettingsManager]: * sizeof long double=12 [2025-04-29 11:10:36,022 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-04-29 11:10:36,022 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-04-29 11:10:36,022 INFO L153 SettingsManager]: * Use constant arrays=true [2025-04-29 11:10:36,022 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-04-29 11:10:36,022 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-29 11:10:36,022 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-29 11:10:36,022 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-29 11:10:36,022 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-04-29 11:10:36,022 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-29 11:10:36,022 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-29 11:10:36,022 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-29 11:10:36,022 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-04-29 11:10:36,022 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-04-29 11:10:36,023 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-04-29 11:10:36,023 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-04-29 11:10:36,023 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-04-29 11:10:36,023 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-04-29 11:10:36,023 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-04-29 11:10:36,023 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-04-29 11:10:36,023 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-04-29 11:10:36,023 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 -> 163286fa0ca6ecf125dadbd9d2d7fa4d47b54b6bd58ecb755c83db237c833242 [2025-04-29 11:10:36,253 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-04-29 11:10:36,261 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-04-29 11:10:36,263 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-04-29 11:10:36,263 INFO L270 PluginConnector]: Initializing CDTParser... [2025-04-29 11:10:36,264 INFO L274 PluginConnector]: CDTParser initialized [2025-04-29 11:10:36,267 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-complex/elimination_backoff_stack-race.c [2025-04-29 11:10:37,622 INFO L538 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3cae4aeb/ed07029107454119aee3a7cc766438bc/FLAG19f2e1ded [2025-04-29 11:10:37,862 INFO L389 CDTParser]: Found 1 translation units. [2025-04-29 11:10:37,863 INFO L178 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-complex/elimination_backoff_stack-race.c [2025-04-29 11:10:37,865 WARN L117 ultiparseSymbolTable]: System include stdio.h could not be resolved by CDT -- only built-in system includes are available. [2025-04-29 11:10:37,866 WARN L117 ultiparseSymbolTable]: System include stdlib.h could not be resolved by CDT -- only built-in system includes are available. [2025-04-29 11:10:37,866 WARN L117 ultiparseSymbolTable]: System include pthread.h could not be resolved by CDT -- only built-in system includes are available. [2025-04-29 11:10:37,866 WARN L117 ultiparseSymbolTable]: System include assert.h could not be resolved by CDT -- only built-in system includes are available. [2025-04-29 11:10:37,892 INFO L432 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3cae4aeb/ed07029107454119aee3a7cc766438bc/FLAG19f2e1ded [2025-04-29 11:10:38,624 INFO L440 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3cae4aeb/ed07029107454119aee3a7cc766438bc [2025-04-29 11:10:38,626 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-04-29 11:10:38,627 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-04-29 11:10:38,627 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-04-29 11:10:38,627 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-04-29 11:10:38,630 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-04-29 11:10:38,631 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.04 11:10:38" (1/1) ... [2025-04-29 11:10:38,633 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@bf0c291 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 11:10:38, skipping insertion in model container [2025-04-29 11:10:38,633 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.04 11:10:38" (1/1) ... [2025-04-29 11:10:38,649 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-04-29 11:10:38,922 INFO L211 PostProcessor]: Analyzing one entry point: main [2025-04-29 11:10:38,934 INFO L200 MainTranslator]: Completed pre-run [2025-04-29 11:10:39,026 INFO L211 PostProcessor]: Analyzing one entry point: main [2025-04-29 11:10:39,046 INFO L204 MainTranslator]: Completed translation [2025-04-29 11:10:39,047 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 11:10:39 WrapperNode [2025-04-29 11:10:39,047 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-04-29 11:10:39,048 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-04-29 11:10:39,048 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-04-29 11:10:39,048 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-04-29 11:10:39,052 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 11:10:39" (1/1) ... [2025-04-29 11:10:39,078 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 11:10:39" (1/1) ... [2025-04-29 11:10:39,349 INFO L138 Inliner]: procedures = 43, calls = 199, calls flagged for inlining = 53, calls inlined = 218, statements flattened = 7590 [2025-04-29 11:10:39,350 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-04-29 11:10:39,351 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-04-29 11:10:39,351 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-04-29 11:10:39,351 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-04-29 11:10:39,357 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 11:10:39" (1/1) ... [2025-04-29 11:10:39,358 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 11:10:39" (1/1) ... [2025-04-29 11:10:39,474 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 11:10:39" (1/1) ... [2025-04-29 11:10:39,474 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 11:10:39" (1/1) ... [2025-04-29 11:10:39,691 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 11:10:39" (1/1) ... [2025-04-29 11:10:39,707 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 11:10:39" (1/1) ... [2025-04-29 11:10:39,726 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 11:10:39" (1/1) ... [2025-04-29 11:10:39,744 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 11:10:39" (1/1) ... [2025-04-29 11:10:39,766 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 11:10:39" (1/1) ... [2025-04-29 11:10:39,826 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-04-29 11:10:39,828 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-04-29 11:10:39,828 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-04-29 11:10:39,828 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-04-29 11:10:39,829 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 11:10:39" (1/1) ... [2025-04-29 11:10:39,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-29 11:10:39,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-29 11:10:39,854 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) [2025-04-29 11:10:39,857 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 [2025-04-29 11:10:39,874 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2025-04-29 11:10:39,874 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-04-29 11:10:39,874 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2025-04-29 11:10:39,874 INFO L130 BoogieDeclarations]: Found specification of procedure instrPop5 [2025-04-29 11:10:39,875 INFO L138 BoogieDeclarations]: Found implementation of procedure instrPop5 [2025-04-29 11:10:39,875 INFO L130 BoogieDeclarations]: Found specification of procedure instrPop6 [2025-04-29 11:10:39,875 INFO L138 BoogieDeclarations]: Found implementation of procedure instrPop6 [2025-04-29 11:10:39,875 INFO L130 BoogieDeclarations]: Found specification of procedure instrPop3 [2025-04-29 11:10:39,875 INFO L138 BoogieDeclarations]: Found implementation of procedure instrPop3 [2025-04-29 11:10:39,875 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2025-04-29 11:10:39,875 INFO L130 BoogieDeclarations]: Found specification of procedure instrPop4 [2025-04-29 11:10:39,875 INFO L138 BoogieDeclarations]: Found implementation of procedure instrPop4 [2025-04-29 11:10:39,875 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2025-04-29 11:10:39,875 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2025-04-29 11:10:39,875 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2025-04-29 11:10:39,875 INFO L130 BoogieDeclarations]: Found specification of procedure instrPush2 [2025-04-29 11:10:39,875 INFO L138 BoogieDeclarations]: Found implementation of procedure instrPush2 [2025-04-29 11:10:39,875 INFO L130 BoogieDeclarations]: Found specification of procedure instrPush1 [2025-04-29 11:10:39,875 INFO L138 BoogieDeclarations]: Found implementation of procedure instrPush1 [2025-04-29 11:10:39,875 INFO L130 BoogieDeclarations]: Found specification of procedure instrPush0 [2025-04-29 11:10:39,875 INFO L138 BoogieDeclarations]: Found implementation of procedure instrPush0 [2025-04-29 11:10:39,875 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-04-29 11:10:39,875 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-04-29 11:10:39,875 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-04-29 11:10:39,875 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-04-29 11:10:39,880 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-04-29 11:10:40,182 INFO L234 CfgBuilder]: Building ICFG [2025-04-29 11:10:40,183 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-04-29 11:10:45,607 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-04-29 11:10:45,607 INFO L283 CfgBuilder]: Performing block encoding [2025-04-29 11:10:50,780 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-04-29 11:10:50,781 INFO L312 CfgBuilder]: Removed 0 assume(true) statements. [2025-04-29 11:10:50,781 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.04 11:10:50 BoogieIcfgContainer [2025-04-29 11:10:50,781 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-04-29 11:10:50,783 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-04-29 11:10:50,783 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-04-29 11:10:50,785 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-04-29 11:10:50,786 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.04 11:10:38" (1/3) ... [2025-04-29 11:10:50,786 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20273dcb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.04 11:10:50, skipping insertion in model container [2025-04-29 11:10:50,786 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 11:10:39" (2/3) ... [2025-04-29 11:10:50,786 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20273dcb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.04 11:10:50, skipping insertion in model container [2025-04-29 11:10:50,786 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.04 11:10:50" (3/3) ... [2025-04-29 11:10:50,787 INFO L128 eAbstractionObserver]: Analyzing ICFG elimination_backoff_stack-race.c [2025-04-29 11:10:50,797 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-04-29 11:10:50,801 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG elimination_backoff_stack-race.c that has 8 procedures, 4590 locations, 4729 edges, 1 initial locations, 0 loop locations, and 621 error locations. [2025-04-29 11:10:50,801 INFO L490 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-04-29 11:10:52,320 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-04-29 11:10:52,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 4611 places, 4736 transitions, 9500 flow [2025-04-29 11:11:01,398 INFO L116 PetriNetUnfolderBase]: 147/4729 cut-off events. [2025-04-29 11:11:01,399 INFO L117 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-04-29 11:11:01,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4751 conditions, 4729 events. 147/4729 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 36181 event pairs, 0 based on Foata normal form. 0/3961 useless extension candidates. Maximal degree in co-relation 4660. Up to 6 conditions per place. [2025-04-29 11:11:01,875 INFO L82 GeneralOperation]: Start removeDead. Operand has 4611 places, 4736 transitions, 9500 flow [2025-04-29 11:11:02,097 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 4604 places, 4729 transitions, 9479 flow [2025-04-29 11:11:02,103 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-04-29 11:11:02,114 INFO L340 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;@28918ea8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-04-29 11:11:02,114 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1248 error locations. [2025-04-29 11:11:02,126 INFO L177 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-04-29 11:11:02,127 INFO L116 PetriNetUnfolderBase]: 0/66 cut-off events. [2025-04-29 11:11:02,127 INFO L117 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-04-29 11:11:02,127 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-29 11:11:02,128 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] [2025-04-29 11:11:02,128 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONDATA_RACE === [instrPop3Err0ASSERT_VIOLATIONDATA_RACE, instrPop3Err1ASSERT_VIOLATIONDATA_RACE, instrPop3Err2ASSERT_VIOLATIONDATA_RACE, instrPop3Err3ASSERT_VIOLATIONDATA_RACE (and 1244 more)] === [2025-04-29 11:11:02,132 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-29 11:11:02,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1493074070, now seen corresponding path program 1 times [2025-04-29 11:11:02,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-29 11:11:02,139 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919173585] [2025-04-29 11:11:02,139 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-29 11:11:02,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-29 11:11:02,231 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 67 statements into 1 equivalence classes. [2025-04-29 11:11:02,276 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 67 of 67 statements. [2025-04-29 11:11:02,276 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-29 11:11:02,276 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 11:11:02,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-29 11:11:02,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-29 11:11:02,887 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919173585] [2025-04-29 11:11:02,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919173585] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-29 11:11:02,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-29 11:11:02,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-04-29 11:11:02,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988155407] [2025-04-29 11:11:02,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-29 11:11:02,898 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-04-29 11:11:02,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-29 11:11:02,917 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-04-29 11:11:02,917 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2025-04-29 11:11:06,203 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 3135 out of 4736 [2025-04-29 11:11:06,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 4604 places, 4729 transitions, 9479 flow. Second operand has 6 states, 6 states have (on average 3136.3333333333335) internal successors, (18818), 6 states have internal predecessors, (18818), 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) [2025-04-29 11:11:06,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-29 11:11:06,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3135 of 4736 [2025-04-29 11:11:06,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand