./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-complex/elimination_backoff_stack.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 735b3cc8 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-Reach-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 ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0a77b23de3110741cf9e339cfb9f72e965f6bc6bc082cff0044fedc6c4916cfb --- Real Ultimate output --- This is Ultimate 0.3.0-?-735b3cc-m [2025-03-14 00:55:09,427 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-14 00:55:09,488 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2025-03-14 00:55:09,495 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-14 00:55:09,495 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-14 00:55:09,515 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-14 00:55:09,516 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-14 00:55:09,516 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-14 00:55:09,516 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-14 00:55:09,516 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-14 00:55:09,516 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-14 00:55:09,516 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-14 00:55:09,516 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-14 00:55:09,516 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-14 00:55:09,516 INFO L153 SettingsManager]: * Use SBE=true [2025-03-14 00:55:09,517 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-14 00:55:09,517 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2025-03-14 00:55:09,517 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-14 00:55:09,517 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-14 00:55:09,517 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-14 00:55:09,517 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-14 00:55:09,517 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2025-03-14 00:55:09,517 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-14 00:55:09,517 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2025-03-14 00:55:09,517 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-14 00:55:09,517 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2025-03-14 00:55:09,517 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-14 00:55:09,517 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-14 00:55:09,517 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-14 00:55:09,517 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-14 00:55:09,517 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-14 00:55:09,517 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-14 00:55:09,517 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-14 00:55:09,518 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-14 00:55:09,518 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-14 00:55:09,518 INFO L153 SettingsManager]: * Compute procedure contracts=false [2025-03-14 00:55:09,518 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2025-03-14 00:55:09,518 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-14 00:55:09,518 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-14 00:55:09,518 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-14 00:55:09,518 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-14 00:55:09,518 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-14 00:55:09,518 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-14 00:55:09,518 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 ! call(reach_error())) ) 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 [2025-03-14 00:55:09,817 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-14 00:55:09,824 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-14 00:55:09,826 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-14 00:55:09,827 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-14 00:55:09,827 INFO L274 PluginConnector]: CDTParser initialized [2025-03-14 00:55:09,828 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-complex/elimination_backoff_stack.i [2025-03-14 00:55:11,042 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5842107d5/878e4cf3e251414d82512d68c82821ab/FLAG8fb4afe3a [2025-03-14 00:55:11,450 INFO L384 CDTParser]: Found 1 translation units. [2025-03-14 00:55:11,450 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-complex/elimination_backoff_stack.i [2025-03-14 00:55:11,474 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5842107d5/878e4cf3e251414d82512d68c82821ab/FLAG8fb4afe3a [2025-03-14 00:55:11,615 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5842107d5/878e4cf3e251414d82512d68c82821ab [2025-03-14 00:55:11,617 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-14 00:55:11,618 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-14 00:55:11,623 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-14 00:55:11,623 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-14 00:55:11,626 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-14 00:55:11,627 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.03 12:55:11" (1/1) ... [2025-03-14 00:55:11,629 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ad4ad6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 12:55:11, skipping insertion in model container [2025-03-14 00:55:11,629 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.03 12:55:11" (1/1) ... [2025-03-14 00:55:11,677 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-14 00:55:12,130 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-complex/elimination_backoff_stack.i[63614,63627] [2025-03-14 00:55:12,154 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-14 00:55:12,165 INFO L200 MainTranslator]: Completed pre-run [2025-03-14 00:55:12,228 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-complex/elimination_backoff_stack.i[63614,63627] [2025-03-14 00:55:12,233 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-14 00:55:12,292 INFO L204 MainTranslator]: Completed translation [2025-03-14 00:55:12,292 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 12:55:12 WrapperNode [2025-03-14 00:55:12,293 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-14 00:55:12,293 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-14 00:55:12,293 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-14 00:55:12,294 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-14 00:55:12,298 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 12:55:12" (1/1) ... [2025-03-14 00:55:12,313 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 12:55:12" (1/1) ... [2025-03-14 00:55:12,399 INFO L138 Inliner]: procedures = 396, calls = 206, calls flagged for inlining = 52, calls inlined = 211, statements flattened = 3772 [2025-03-14 00:55:12,400 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-14 00:55:12,400 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-14 00:55:12,401 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-14 00:55:12,401 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-14 00:55:12,407 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 12:55:12" (1/1) ... [2025-03-14 00:55:12,407 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 12:55:12" (1/1) ... [2025-03-14 00:55:12,438 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 12:55:12" (1/1) ... [2025-03-14 00:55:12,614 INFO L175 MemorySlicer]: Split 700 memory accesses to 9 slices as follows [2, 86, 36, 28, 22, 25, 366, 22, 113]. 52 percent of accesses are in the largest equivalence class. The 39 initializations are split as follows [2, 1, 4, 2, 2, 3, 16, 1, 8]. The 287 writes are split as follows [0, 29, 25, 6, 3, 4, 157, 7, 56]. [2025-03-14 00:55:12,614 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 12:55:12" (1/1) ... [2025-03-14 00:55:12,614 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 12:55:12" (1/1) ... [2025-03-14 00:55:12,675 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 12:55:12" (1/1) ... [2025-03-14 00:55:12,681 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 12:55:12" (1/1) ... [2025-03-14 00:55:12,689 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 12:55:12" (1/1) ... [2025-03-14 00:55:12,699 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 12:55:12" (1/1) ... [2025-03-14 00:55:12,744 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-14 00:55:12,745 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-14 00:55:12,745 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-14 00:55:12,745 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-14 00:55:12,746 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 12:55:12" (1/1) ... [2025-03-14 00:55:12,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-14 00:55:12,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-14 00:55:12,771 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) [2025-03-14 00:55:12,773 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 [2025-03-14 00:55:12,787 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-03-14 00:55:12,787 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-03-14 00:55:12,787 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-14 00:55:12,787 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-14 00:55:12,787 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2025-03-14 00:55:12,787 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2025-03-14 00:55:12,788 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2025-03-14 00:55:12,788 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2025-03-14 00:55:12,788 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#6 [2025-03-14 00:55:12,788 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#7 [2025-03-14 00:55:12,788 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#8 [2025-03-14 00:55:12,788 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-14 00:55:12,788 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2025-03-14 00:55:12,788 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2025-03-14 00:55:12,788 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2025-03-14 00:55:12,788 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#3 [2025-03-14 00:55:12,789 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#4 [2025-03-14 00:55:12,789 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#5 [2025-03-14 00:55:12,789 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#6 [2025-03-14 00:55:12,789 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#7 [2025-03-14 00:55:12,789 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#8 [2025-03-14 00:55:12,789 INFO L130 BoogieDeclarations]: Found specification of procedure instrPush2 [2025-03-14 00:55:12,789 INFO L138 BoogieDeclarations]: Found implementation of procedure instrPush2 [2025-03-14 00:55:12,789 INFO L130 BoogieDeclarations]: Found specification of procedure instrPush1 [2025-03-14 00:55:12,789 INFO L138 BoogieDeclarations]: Found implementation of procedure instrPush1 [2025-03-14 00:55:12,789 INFO L130 BoogieDeclarations]: Found specification of procedure instrPush0 [2025-03-14 00:55:12,789 INFO L138 BoogieDeclarations]: Found implementation of procedure instrPush0 [2025-03-14 00:55:12,789 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-14 00:55:12,789 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-14 00:55:12,789 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2025-03-14 00:55:12,789 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2025-03-14 00:55:12,789 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2025-03-14 00:55:12,789 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#3 [2025-03-14 00:55:12,789 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#4 [2025-03-14 00:55:12,789 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#5 [2025-03-14 00:55:12,789 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#6 [2025-03-14 00:55:12,789 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#7 [2025-03-14 00:55:12,789 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#8 [2025-03-14 00:55:12,789 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2025-03-14 00:55:12,789 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2025-03-14 00:55:12,789 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2025-03-14 00:55:12,789 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#3 [2025-03-14 00:55:12,789 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#4 [2025-03-14 00:55:12,789 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#5 [2025-03-14 00:55:12,790 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#6 [2025-03-14 00:55:12,790 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#7 [2025-03-14 00:55:12,790 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#8 [2025-03-14 00:55:12,790 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-14 00:55:12,790 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-14 00:55:12,790 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2025-03-14 00:55:12,790 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2025-03-14 00:55:12,790 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2025-03-14 00:55:12,790 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2025-03-14 00:55:12,790 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#6 [2025-03-14 00:55:12,790 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#7 [2025-03-14 00:55:12,790 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#8 [2025-03-14 00:55:12,790 INFO L130 BoogieDeclarations]: Found specification of procedure instrPop5 [2025-03-14 00:55:12,790 INFO L138 BoogieDeclarations]: Found implementation of procedure instrPop5 [2025-03-14 00:55:12,790 INFO L130 BoogieDeclarations]: Found specification of procedure instrPop6 [2025-03-14 00:55:12,790 INFO L138 BoogieDeclarations]: Found implementation of procedure instrPop6 [2025-03-14 00:55:12,790 INFO L130 BoogieDeclarations]: Found specification of procedure instrPop3 [2025-03-14 00:55:12,790 INFO L138 BoogieDeclarations]: Found implementation of procedure instrPop3 [2025-03-14 00:55:12,790 INFO L130 BoogieDeclarations]: Found specification of procedure instrPop4 [2025-03-14 00:55:12,790 INFO L138 BoogieDeclarations]: Found implementation of procedure instrPop4 [2025-03-14 00:55:12,790 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-14 00:55:12,790 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-14 00:55:12,790 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-03-14 00:55:12,790 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2025-03-14 00:55:12,790 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2025-03-14 00:55:12,792 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2025-03-14 00:55:12,792 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2025-03-14 00:55:12,792 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#7 [2025-03-14 00:55:12,792 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#8 [2025-03-14 00:55:12,795 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-03-14 00:55:13,084 INFO L256 CfgBuilder]: Building ICFG [2025-03-14 00:55:13,085 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-14 00:55:13,721 INFO L1326 $ProcedureCfgBuilder]: dead code at ProgramPoint L1463: havoc TryPerformStackOp_~i~2#1; [2025-03-14 00:55:13,722 INFO L1326 $ProcedureCfgBuilder]: dead code at ProgramPoint L1463-10: havoc TryPerformStackOp_~i~2#1; [2025-03-14 00:55:14,108 INFO L1326 $ProcedureCfgBuilder]: dead code at ProgramPoint L1463: havoc TryPerformStackOp_~i~2#1; [2025-03-14 00:55:14,108 INFO L1326 $ProcedureCfgBuilder]: dead code at ProgramPoint L1463-10: havoc TryPerformStackOp_~i~2#1; [2025-03-14 00:55:14,438 INFO L1326 $ProcedureCfgBuilder]: dead code at ProgramPoint L1463: havoc TryPerformStackOp_~i~2#1; [2025-03-14 00:55:14,438 INFO L1326 $ProcedureCfgBuilder]: dead code at ProgramPoint L1463-10: havoc TryPerformStackOp_~i~2#1; [2025-03-14 00:55:14,780 INFO L1326 $ProcedureCfgBuilder]: dead code at ProgramPoint L1463: havoc TryPerformStackOp_~i~2#1; [2025-03-14 00:55:14,780 INFO L1326 $ProcedureCfgBuilder]: dead code at ProgramPoint L1463-10: havoc TryPerformStackOp_~i~2#1; [2025-03-14 00:55:15,112 INFO L1326 $ProcedureCfgBuilder]: dead code at ProgramPoint L1463: havoc TryPerformStackOp_~i~2#1; [2025-03-14 00:55:15,113 INFO L1326 $ProcedureCfgBuilder]: dead code at ProgramPoint L1463-10: havoc TryPerformStackOp_~i~2#1; [2025-03-14 00:55:15,437 INFO L1326 $ProcedureCfgBuilder]: dead code at ProgramPoint L1463: havoc TryPerformStackOp_~i~2#1; [2025-03-14 00:55:15,437 INFO L1326 $ProcedureCfgBuilder]: dead code at ProgramPoint L1463-10: havoc TryPerformStackOp_~i~2#1; [2025-03-14 00:55:15,750 INFO L1326 $ProcedureCfgBuilder]: dead code at ProgramPoint L1463: havoc TryPerformStackOp_~i~2#1; [2025-03-14 00:55:15,751 INFO L1326 $ProcedureCfgBuilder]: dead code at ProgramPoint L1463-10: havoc TryPerformStackOp_~i~2#1; [2025-03-14 00:55:15,818 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-14 00:55:15,819 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-14 00:55:15,819 INFO L318 CfgBuilder]: Performing block encoding [2025-03-14 00:55:18,359 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-14 00:55:18,360 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 14.03 12:55:18 BoogieIcfgContainer [2025-03-14 00:55:18,360 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-14 00:55:18,361 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-14 00:55:18,361 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-14 00:55:18,364 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-14 00:55:18,365 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.03 12:55:11" (1/3) ... [2025-03-14 00:55:18,365 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c0db921 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.03 12:55:18, skipping insertion in model container [2025-03-14 00:55:18,365 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.03 12:55:12" (2/3) ... [2025-03-14 00:55:18,365 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c0db921 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.03 12:55:18, skipping insertion in model container [2025-03-14 00:55:18,365 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 14.03 12:55:18" (3/3) ... [2025-03-14 00:55:18,366 INFO L128 eAbstractionObserver]: Analyzing ICFG elimination_backoff_stack.i [2025-03-14 00:55:18,377 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-14 00:55:18,378 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG elimination_backoff_stack.i that has 8 procedures, 409 locations, 1 initial locations, 0 loop locations, and 7 error locations. [2025-03-14 00:55:18,378 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-14 00:55:18,883 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2025-03-14 00:55:18,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 430 places, 506 transitions, 1040 flow [2025-03-14 00:55:19,133 INFO L124 PetriNetUnfolderBase]: 98/499 cut-off events. [2025-03-14 00:55:19,134 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-03-14 00:55:19,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 521 conditions, 499 events. 98/499 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 2698 event pairs, 0 based on Foata normal form. 0/394 useless extension candidates. Maximal degree in co-relation 509. Up to 5 conditions per place. [2025-03-14 00:55:19,153 INFO L82 GeneralOperation]: Start removeDead. Operand has 430 places, 506 transitions, 1040 flow [2025-03-14 00:55:19,167 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 423 places, 499 transitions, 1019 flow [2025-03-14 00:55:19,175 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-14 00:55:19,185 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;@7a738d8d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-14 00:55:19,185 INFO L334 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2025-03-14 00:55:19,203 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-14 00:55:19,203 INFO L124 PetriNetUnfolderBase]: 5/74 cut-off events. [2025-03-14 00:55:19,203 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-03-14 00:55:19,203 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-14 00:55:19,204 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-14 00:55:19,204 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting instrPush0Err0ASSERT_VIOLATIONERROR_FUNCTION === [instrPop3Err0ASSERT_VIOLATIONERROR_FUNCTION, instrPop4Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 18 more)] === [2025-03-14 00:55:19,321 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-14 00:55:19,322 INFO L85 PathProgramCache]: Analyzing trace with hash 282397301, now seen corresponding path program 1 times [2025-03-14 00:55:19,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-14 00:55:19,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449300713] [2025-03-14 00:55:19,330 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-14 00:55:19,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-14 00:55:19,428 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-03-14 00:55:19,484 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-03-14 00:55:19,485 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-14 00:55:19,485 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-14 00:55:19,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-14 00:55:19,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-14 00:55:19,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449300713] [2025-03-14 00:55:19,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449300713] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-14 00:55:19,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-14 00:55:19,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-14 00:55:19,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632917422] [2025-03-14 00:55:19,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-14 00:55:19,723 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-14 00:55:19,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-14 00:55:19,741 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-14 00:55:19,742 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-14 00:55:19,747 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 506 [2025-03-14 00:55:19,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 499 transitions, 1019 flow. Second operand has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 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) [2025-03-14 00:55:19,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-14 00:55:19,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 506 [2025-03-14 00:55:19,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand