./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-sets/test_mutex_unlock_at_exit.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7e1ff0e6 Calling Ultimate with: /usr/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_1.5.800.v20200727-1323.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/ldv-sets/test_mutex_unlock_at_exit.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.graphml --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 fd310154a8f082280317f3bf1f868dbee13522304c8e13d29736e7fb8b36c7cf --- Real Ultimate output --- This is Ultimate 0.2.2-?-7e1ff0e [2023-02-14 22:52:45,470 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-14 22:52:45,473 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-14 22:52:45,512 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-14 22:52:45,512 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-14 22:52:45,515 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-14 22:52:45,518 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-14 22:52:45,520 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-14 22:52:45,522 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-14 22:52:45,526 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-14 22:52:45,528 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-14 22:52:45,530 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-14 22:52:45,530 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-14 22:52:45,532 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-14 22:52:45,534 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-14 22:52:45,535 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-14 22:52:45,536 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-14 22:52:45,537 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-14 22:52:45,539 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-14 22:52:45,543 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-14 22:52:45,545 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-14 22:52:45,546 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-14 22:52:45,547 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-14 22:52:45,548 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-14 22:52:45,555 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-14 22:52:45,556 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-14 22:52:45,556 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-14 22:52:45,558 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-14 22:52:45,558 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-14 22:52:45,559 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-14 22:52:45,559 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-14 22:52:45,560 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-14 22:52:45,561 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-14 22:52:45,563 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-14 22:52:45,563 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-14 22:52:45,564 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-14 22:52:45,564 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-14 22:52:45,565 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-14 22:52:45,565 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-14 22:52:45,566 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-14 22:52:45,567 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-14 22:52:45,568 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-14 22:52:45,594 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-14 22:52:45,601 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-14 22:52:45,602 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-14 22:52:45,602 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-14 22:52:45,603 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-14 22:52:45,603 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-14 22:52:45,604 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-14 22:52:45,604 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-14 22:52:45,604 INFO L138 SettingsManager]: * Use SBE=true [2023-02-14 22:52:45,604 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-14 22:52:45,605 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-14 22:52:45,605 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-14 22:52:45,605 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-14 22:52:45,606 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-14 22:52:45,606 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-14 22:52:45,606 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-14 22:52:45,606 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-14 22:52:45,606 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-14 22:52:45,607 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-14 22:52:45,607 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-14 22:52:45,607 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-14 22:52:45,607 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-14 22:52:45,607 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-14 22:52:45,608 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-14 22:52:45,608 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 22:52:45,608 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-14 22:52:45,608 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-14 22:52:45,609 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-14 22:52:45,609 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-14 22:52:45,609 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-14 22:52:45,609 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-14 22:52:45,610 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-14 22:52:45,610 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-14 22:52:45,610 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-14 22:52:45,610 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-14 22:52:45,611 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fd310154a8f082280317f3bf1f868dbee13522304c8e13d29736e7fb8b36c7cf [2023-02-14 22:52:45,840 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-14 22:52:45,858 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-14 22:52:45,860 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-14 22:52:45,861 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-14 22:52:45,862 INFO L275 PluginConnector]: CDTParser initialized [2023-02-14 22:52:45,863 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-sets/test_mutex_unlock_at_exit.i [2023-02-14 22:52:46,944 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-14 22:52:47,216 INFO L351 CDTParser]: Found 1 translation units. [2023-02-14 22:52:47,219 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-sets/test_mutex_unlock_at_exit.i [2023-02-14 22:52:47,238 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e07a17150/8a5954904a1c4d0097f9458543cac6b2/FLAGa4dc2d5fd [2023-02-14 22:52:47,254 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e07a17150/8a5954904a1c4d0097f9458543cac6b2 [2023-02-14 22:52:47,256 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-14 22:52:47,257 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-14 22:52:47,258 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-14 22:52:47,259 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-14 22:52:47,262 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-14 22:52:47,263 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 10:52:47" (1/1) ... [2023-02-14 22:52:47,264 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@127aaf26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:52:47, skipping insertion in model container [2023-02-14 22:52:47,264 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 10:52:47" (1/1) ... [2023-02-14 22:52:47,270 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-14 22:52:47,301 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-14 22:52:47,586 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-sets/test_mutex_unlock_at_exit.i[25842,25855] [2023-02-14 22:52:47,593 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-sets/test_mutex_unlock_at_exit.i[25967,25980] [2023-02-14 22:52:47,597 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-sets/test_mutex_unlock_at_exit.i[26082,26095] [2023-02-14 22:52:47,598 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 22:52:47,609 INFO L203 MainTranslator]: Completed pre-run [2023-02-14 22:52:47,659 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-sets/test_mutex_unlock_at_exit.i[25842,25855] [2023-02-14 22:52:47,660 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-sets/test_mutex_unlock_at_exit.i[25967,25980] [2023-02-14 22:52:47,660 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-sets/test_mutex_unlock_at_exit.i[26082,26095] [2023-02-14 22:52:47,665 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 22:52:47,696 INFO L208 MainTranslator]: Completed translation [2023-02-14 22:52:47,697 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:52:47 WrapperNode [2023-02-14 22:52:47,697 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-14 22:52:47,698 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-14 22:52:47,698 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-14 22:52:47,699 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-14 22:52:47,705 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:52:47" (1/1) ... [2023-02-14 22:52:47,725 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:52:47" (1/1) ... [2023-02-14 22:52:47,749 INFO L138 Inliner]: procedures = 139, calls = 56, calls flagged for inlining = 15, calls inlined = 14, statements flattened = 128 [2023-02-14 22:52:47,750 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-14 22:52:47,757 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-14 22:52:47,758 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-14 22:52:47,758 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-14 22:52:47,768 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:52:47" (1/1) ... [2023-02-14 22:52:47,768 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:52:47" (1/1) ... [2023-02-14 22:52:47,774 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:52:47" (1/1) ... [2023-02-14 22:52:47,775 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:52:47" (1/1) ... [2023-02-14 22:52:47,785 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:52:47" (1/1) ... [2023-02-14 22:52:47,788 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:52:47" (1/1) ... [2023-02-14 22:52:47,798 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:52:47" (1/1) ... [2023-02-14 22:52:47,800 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:52:47" (1/1) ... [2023-02-14 22:52:47,803 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-14 22:52:47,804 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-14 22:52:47,807 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-14 22:52:47,807 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-14 22:52:47,808 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:52:47" (1/1) ... [2023-02-14 22:52:47,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 22:52:47,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 22:52:47,840 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-14 22:52:47,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-14 22:52:47,889 INFO L130 BoogieDeclarations]: Found specification of procedure __ldv_list_add [2023-02-14 22:52:47,889 INFO L138 BoogieDeclarations]: Found implementation of procedure __ldv_list_add [2023-02-14 22:52:47,889 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-14 22:52:47,889 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2023-02-14 22:52:47,889 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2023-02-14 22:52:47,890 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-14 22:52:47,890 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-02-14 22:52:47,890 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_in_set [2023-02-14 22:52:47,890 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_in_set [2023-02-14 22:52:47,890 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-02-14 22:52:47,890 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-14 22:52:47,890 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-02-14 22:52:47,891 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-14 22:52:47,891 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_successful_malloc [2023-02-14 22:52:47,891 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_successful_malloc [2023-02-14 22:52:47,891 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-14 22:52:47,891 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-14 22:52:48,085 INFO L235 CfgBuilder]: Building ICFG [2023-02-14 22:52:48,087 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-14 22:52:48,454 INFO L276 CfgBuilder]: Performing block encoding [2023-02-14 22:52:48,460 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-14 22:52:48,460 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2023-02-14 22:52:48,462 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 10:52:48 BoogieIcfgContainer [2023-02-14 22:52:48,462 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-14 22:52:48,464 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-14 22:52:48,464 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-14 22:52:48,467 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-14 22:52:48,467 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.02 10:52:47" (1/3) ... [2023-02-14 22:52:48,468 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d27e6b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 10:52:48, skipping insertion in model container [2023-02-14 22:52:48,468 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:52:47" (2/3) ... [2023-02-14 22:52:48,468 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d27e6b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 10:52:48, skipping insertion in model container [2023-02-14 22:52:48,468 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 10:52:48" (3/3) ... [2023-02-14 22:52:48,470 INFO L112 eAbstractionObserver]: Analyzing ICFG test_mutex_unlock_at_exit.i [2023-02-14 22:52:48,485 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-14 22:52:48,486 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2023-02-14 22:52:48,525 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-14 22:52:48,531 INFO L357 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, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@475adc22, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-14 22:52:48,532 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-02-14 22:52:48,535 INFO L276 IsEmpty]: Start isEmpty. Operand has 66 states, 49 states have (on average 1.2857142857142858) internal successors, (63), 52 states have internal predecessors, (63), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-14 22:52:48,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-14 22:52:48,541 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:52:48,542 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:52:48,543 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mutex_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [mutex_lockErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:52:48,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:52:48,548 INFO L85 PathProgramCache]: Analyzing trace with hash -1577806477, now seen corresponding path program 1 times [2023-02-14 22:52:48,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:52:48,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49385525] [2023-02-14 22:52:48,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:52:48,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:52:48,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:52:48,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 22:52:48,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:52:48,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-02-14 22:52:48,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:52:48,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-02-14 22:52:48,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:52:48,839 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-14 22:52:48,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:52:48,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49385525] [2023-02-14 22:52:48,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49385525] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 22:52:48,844 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 22:52:48,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-14 22:52:48,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941855714] [2023-02-14 22:52:48,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 22:52:48,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-14 22:52:48,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:52:48,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-14 22:52:48,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-14 22:52:48,896 INFO L87 Difference]: Start difference. First operand has 66 states, 49 states have (on average 1.2857142857142858) internal successors, (63), 52 states have internal predecessors, (63), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-14 22:52:49,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:52:49,013 INFO L93 Difference]: Finished difference Result 131 states and 169 transitions. [2023-02-14 22:52:49,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-14 22:52:49,016 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2023-02-14 22:52:49,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:52:49,025 INFO L225 Difference]: With dead ends: 131 [2023-02-14 22:52:49,025 INFO L226 Difference]: Without dead ends: 64 [2023-02-14 22:52:49,029 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-14 22:52:49,034 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 21 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 22:52:49,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 99 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 22:52:49,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-02-14 22:52:49,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 61. [2023-02-14 22:52:49,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 47 states have internal predecessors, (52), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-14 22:52:49,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 70 transitions. [2023-02-14 22:52:49,083 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 70 transitions. Word has length 28 [2023-02-14 22:52:49,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:52:49,083 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 70 transitions. [2023-02-14 22:52:49,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-14 22:52:49,083 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 70 transitions. [2023-02-14 22:52:49,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-14 22:52:49,085 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:52:49,086 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:52:49,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-14 22:52:49,087 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mutex_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [mutex_lockErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:52:49,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:52:49,089 INFO L85 PathProgramCache]: Analyzing trace with hash -109345869, now seen corresponding path program 1 times [2023-02-14 22:52:49,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:52:49,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803181222] [2023-02-14 22:52:49,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:52:49,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:52:49,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:52:49,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 22:52:49,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:52:49,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-02-14 22:52:49,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:52:49,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-02-14 22:52:49,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:52:49,330 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-14 22:52:49,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:52:49,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803181222] [2023-02-14 22:52:49,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803181222] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 22:52:49,331 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 22:52:49,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-14 22:52:49,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189101934] [2023-02-14 22:52:49,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 22:52:49,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-14 22:52:49,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:52:49,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-14 22:52:49,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-14 22:52:49,334 INFO L87 Difference]: Start difference. First operand 61 states and 70 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-14 22:52:49,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:52:49,477 INFO L93 Difference]: Finished difference Result 70 states and 82 transitions. [2023-02-14 22:52:49,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-14 22:52:49,478 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2023-02-14 22:52:49,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:52:49,480 INFO L225 Difference]: With dead ends: 70 [2023-02-14 22:52:49,480 INFO L226 Difference]: Without dead ends: 68 [2023-02-14 22:52:49,480 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-02-14 22:52:49,482 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 24 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 22:52:49,482 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 192 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 22:52:49,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-02-14 22:52:49,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 65. [2023-02-14 22:52:49,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 48 states have (on average 1.1458333333333333) internal successors, (55), 50 states have internal predecessors, (55), 9 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (12), 10 states have call predecessors, (12), 9 states have call successors, (12) [2023-02-14 22:52:49,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 76 transitions. [2023-02-14 22:52:49,491 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 76 transitions. Word has length 28 [2023-02-14 22:52:49,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:52:49,491 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 76 transitions. [2023-02-14 22:52:49,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-14 22:52:49,492 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 76 transitions. [2023-02-14 22:52:49,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-14 22:52:49,492 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:52:49,494 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:52:49,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-14 22:52:49,495 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mutex_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [mutex_lockErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:52:49,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:52:49,495 INFO L85 PathProgramCache]: Analyzing trace with hash 1465257436, now seen corresponding path program 1 times [2023-02-14 22:52:49,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:52:49,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356514992] [2023-02-14 22:52:49,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:52:49,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:52:49,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:52:49,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 22:52:49,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:52:49,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-02-14 22:52:49,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:52:49,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-02-14 22:52:49,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:52:49,873 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-14 22:52:49,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:52:49,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356514992] [2023-02-14 22:52:49,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356514992] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 22:52:49,875 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 22:52:49,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-14 22:52:49,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260493564] [2023-02-14 22:52:49,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 22:52:49,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-14 22:52:49,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:52:49,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-14 22:52:49,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-14 22:52:49,882 INFO L87 Difference]: Start difference. First operand 65 states and 76 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-14 22:52:50,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:52:50,266 INFO L93 Difference]: Finished difference Result 186 states and 229 transitions. [2023-02-14 22:52:50,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-14 22:52:50,267 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2023-02-14 22:52:50,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:52:50,269 INFO L225 Difference]: With dead ends: 186 [2023-02-14 22:52:50,269 INFO L226 Difference]: Without dead ends: 129 [2023-02-14 22:52:50,270 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2023-02-14 22:52:50,271 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 126 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 22:52:50,272 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 246 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 22:52:50,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2023-02-14 22:52:50,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 99. [2023-02-14 22:52:50,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 72 states have (on average 1.1527777777777777) internal successors, (83), 77 states have internal predecessors, (83), 14 states have call successors, (14), 7 states have call predecessors, (14), 10 states have return successors, (21), 14 states have call predecessors, (21), 14 states have call successors, (21) [2023-02-14 22:52:50,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 118 transitions. [2023-02-14 22:52:50,287 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 118 transitions. Word has length 28 [2023-02-14 22:52:50,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:52:50,287 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 118 transitions. [2023-02-14 22:52:50,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-14 22:52:50,287 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 118 transitions. [2023-02-14 22:52:50,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-02-14 22:52:50,289 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:52:50,290 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 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] [2023-02-14 22:52:50,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-14 22:52:50,290 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mutex_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [mutex_lockErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:52:50,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:52:50,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1566335676, now seen corresponding path program 1 times [2023-02-14 22:52:50,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:52:50,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512894103] [2023-02-14 22:52:50,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:52:50,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:52:50,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:52:52,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 22:52:52,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:52:52,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-02-14 22:52:52,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:52:52,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-02-14 22:52:53,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:52:53,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-02-14 22:52:53,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:52:53,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-02-14 22:52:53,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:52:53,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2023-02-14 22:52:53,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:52:54,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-02-14 22:52:54,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:52:54,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2023-02-14 22:52:54,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:52:54,534 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 17 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-14 22:52:54,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:52:54,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512894103] [2023-02-14 22:52:54,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512894103] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 22:52:54,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546977003] [2023-02-14 22:52:54,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:52:54,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 22:52:54,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 22:52:54,539 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 22:52:54,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-14 22:52:54,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:52:54,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 185 conjunts are in the unsatisfiable core [2023-02-14 22:52:54,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 22:52:55,024 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-02-14 22:52:55,027 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-02-14 22:52:55,231 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2023-02-14 22:52:55,232 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 33 [2023-02-14 22:52:55,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-02-14 22:52:56,237 INFO L321 Elim1Store]: treesize reduction 117, result has 35.4 percent of original size [2023-02-14 22:52:56,237 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 194 treesize of output 281 [2023-02-14 22:52:56,254 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-02-14 22:52:56,268 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-02-14 22:52:56,284 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-02-14 22:52:56,512 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-14 22:52:56,662 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-14 22:52:56,690 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 22:52:56,693 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 200 treesize of output 159 [2023-02-14 22:52:56,721 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-02-14 22:52:56,789 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 22:52:56,800 INFO L321 Elim1Store]: treesize reduction 13, result has 38.1 percent of original size [2023-02-14 22:52:56,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 160 treesize of output 127 [2023-02-14 22:52:56,852 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-14 22:52:56,870 INFO L321 Elim1Store]: treesize reduction 24, result has 25.0 percent of original size [2023-02-14 22:52:56,871 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 101 treesize of output 52 [2023-02-14 22:52:56,901 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-02-14 22:52:56,911 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-02-14 22:52:57,660 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 52 [2023-02-14 22:53:03,499 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 22:54:03,368 WARN L233 SmtUtils]: Spent 59.85s on a formula simplification. DAG size of input: 163 DAG size of output: 58 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2023-02-14 22:54:03,372 INFO L321 Elim1Store]: treesize reduction 416, result has 20.2 percent of original size [2023-02-14 22:54:03,373 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 17 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 22 new quantified variables, introduced 30 case distinctions, treesize of input 2341 treesize of output 2049 [2023-02-14 22:54:03,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 22:54:03,510 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 22:54:03,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 22:54:03,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 22:54:03,573 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 22:54:03,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 22:54:03,669 INFO L173 IndexEqualityManager]: detected equality via solver