./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-divine/ring_1w1r-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6c24879c 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/pthread-divine/ring_1w1r-1.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 3a956b76a4ba98ce13df4d83ef2fb7ffa0973225ecb152c14bcfbb55b6546601 --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 10:13:09,316 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 10:13:09,318 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 10:13:09,350 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 10:13:09,351 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 10:13:09,352 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 10:13:09,354 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 10:13:09,360 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 10:13:09,362 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 10:13:09,366 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 10:13:09,367 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 10:13:09,369 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 10:13:09,369 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 10:13:09,371 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 10:13:09,373 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 10:13:09,375 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 10:13:09,376 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 10:13:09,377 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 10:13:09,379 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 10:13:09,384 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 10:13:09,385 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 10:13:09,386 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 10:13:09,387 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 10:13:09,388 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 10:13:09,389 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 10:13:09,395 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 10:13:09,395 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 10:13:09,396 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 10:13:09,397 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 10:13:09,398 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 10:13:09,399 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 10:13:09,399 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 10:13:09,400 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 10:13:09,401 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 10:13:09,402 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 10:13:09,402 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 10:13:09,403 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 10:13:09,403 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 10:13:09,403 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 10:13:09,404 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 10:13:09,404 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 10:13:09,406 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 10:13:09,407 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-12 10:13:09,430 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 10:13:09,430 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 10:13:09,430 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 10:13:09,431 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 10:13:09,431 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 10:13:09,432 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 10:13:09,432 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 10:13:09,432 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 10:13:09,433 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 10:13:09,433 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 10:13:09,434 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 10:13:09,434 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 10:13:09,434 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 10:13:09,434 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 10:13:09,434 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-12 10:13:09,435 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 10:13:09,435 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-12 10:13:09,435 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 10:13:09,435 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-12 10:13:09,436 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 10:13:09,436 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-12 10:13:09,436 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 10:13:09,436 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 10:13:09,437 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 10:13:09,437 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 10:13:09,437 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 10:13:09,437 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 10:13:09,437 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-12 10:13:09,438 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 10:13:09,438 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 10:13:09,438 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-12 10:13:09,438 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-12 10:13:09,438 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-12 10:13:09,439 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3a956b76a4ba98ce13df4d83ef2fb7ffa0973225ecb152c14bcfbb55b6546601 [2022-07-12 10:13:09,645 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 10:13:09,674 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 10:13:09,676 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 10:13:09,677 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 10:13:09,679 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 10:13:09,680 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-divine/ring_1w1r-1.i [2022-07-12 10:13:09,741 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b87fe019/e694e2ff1c304ad19be602ffcfbbda55/FLAG40b7c3d56 [2022-07-12 10:13:10,166 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 10:13:10,166 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-divine/ring_1w1r-1.i [2022-07-12 10:13:10,194 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b87fe019/e694e2ff1c304ad19be602ffcfbbda55/FLAG40b7c3d56 [2022-07-12 10:13:10,529 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b87fe019/e694e2ff1c304ad19be602ffcfbbda55 [2022-07-12 10:13:10,531 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 10:13:10,532 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 10:13:10,536 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 10:13:10,536 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 10:13:10,538 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 10:13:10,539 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 10:13:10" (1/1) ... [2022-07-12 10:13:10,540 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18b77d9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:13:10, skipping insertion in model container [2022-07-12 10:13:10,540 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 10:13:10" (1/1) ... [2022-07-12 10:13:10,545 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 10:13:10,589 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 10:13:10,710 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-07-12 10:13:10,893 WARN L230 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-divine/ring_1w1r-1.i[39095,39108] [2022-07-12 10:13:10,897 WARN L230 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-divine/ring_1w1r-1.i[39180,39193] [2022-07-12 10:13:10,899 WARN L230 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-divine/ring_1w1r-1.i[39232,39245] [2022-07-12 10:13:10,906 WARN L230 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-divine/ring_1w1r-1.i[39641,39654] [2022-07-12 10:13:10,907 WARN L230 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-divine/ring_1w1r-1.i[39726,39739] [2022-07-12 10:13:10,908 WARN L230 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-divine/ring_1w1r-1.i[39778,39791] [2022-07-12 10:13:10,915 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 10:13:10,922 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 10:13:10,933 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-07-12 10:13:10,955 WARN L230 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-divine/ring_1w1r-1.i[39095,39108] [2022-07-12 10:13:10,960 WARN L230 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-divine/ring_1w1r-1.i[39180,39193] [2022-07-12 10:13:10,961 WARN L230 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-divine/ring_1w1r-1.i[39232,39245] [2022-07-12 10:13:10,967 WARN L230 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-divine/ring_1w1r-1.i[39641,39654] [2022-07-12 10:13:10,968 WARN L230 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-divine/ring_1w1r-1.i[39726,39739] [2022-07-12 10:13:10,969 WARN L230 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-divine/ring_1w1r-1.i[39778,39791] [2022-07-12 10:13:10,974 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 10:13:11,015 INFO L208 MainTranslator]: Completed translation [2022-07-12 10:13:11,016 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:13:11 WrapperNode [2022-07-12 10:13:11,016 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 10:13:11,017 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 10:13:11,018 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 10:13:11,018 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 10:13:11,024 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:13:11" (1/1) ... [2022-07-12 10:13:11,053 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:13:11" (1/1) ... [2022-07-12 10:13:11,086 INFO L137 Inliner]: procedures = 225, calls = 43, calls flagged for inlining = 10, calls inlined = 7, statements flattened = 113 [2022-07-12 10:13:11,087 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 10:13:11,088 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 10:13:11,088 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 10:13:11,088 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 10:13:11,095 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:13:11" (1/1) ... [2022-07-12 10:13:11,097 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:13:11" (1/1) ... [2022-07-12 10:13:11,101 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:13:11" (1/1) ... [2022-07-12 10:13:11,101 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:13:11" (1/1) ... [2022-07-12 10:13:11,109 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:13:11" (1/1) ... [2022-07-12 10:13:11,121 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:13:11" (1/1) ... [2022-07-12 10:13:11,123 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:13:11" (1/1) ... [2022-07-12 10:13:11,126 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 10:13:11,126 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 10:13:11,127 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 10:13:11,127 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 10:13:11,134 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:13:11" (1/1) ... [2022-07-12 10:13:11,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 10:13:11,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:13:11,157 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-12 10:13:11,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-12 10:13:11,186 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-12 10:13:11,186 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-12 10:13:11,186 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-12 10:13:11,186 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-12 10:13:11,186 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 10:13:11,187 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-12 10:13:11,187 INFO L130 BoogieDeclarations]: Found specification of procedure reader_nowait_fn [2022-07-12 10:13:11,187 INFO L138 BoogieDeclarations]: Found implementation of procedure reader_nowait_fn [2022-07-12 10:13:11,187 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 10:13:11,187 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 10:13:11,188 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-12 10:13:11,273 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 10:13:11,274 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 10:13:11,457 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 10:13:11,463 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 10:13:11,463 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-12 10:13:11,465 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 10:13:11 BoogieIcfgContainer [2022-07-12 10:13:11,465 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 10:13:11,467 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 10:13:11,467 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 10:13:11,476 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 10:13:11,477 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 10:13:10" (1/3) ... [2022-07-12 10:13:11,477 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3468b0a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 10:13:11, skipping insertion in model container [2022-07-12 10:13:11,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:13:11" (2/3) ... [2022-07-12 10:13:11,478 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3468b0a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 10:13:11, skipping insertion in model container [2022-07-12 10:13:11,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 10:13:11" (3/3) ... [2022-07-12 10:13:11,479 INFO L111 eAbstractionObserver]: Analyzing ICFG ring_1w1r-1.i [2022-07-12 10:13:11,483 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-12 10:13:11,500 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 10:13:11,500 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2022-07-12 10:13:11,501 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-12 10:13:11,598 INFO L135 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-07-12 10:13:11,629 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 136 places, 141 transitions, 290 flow [2022-07-12 10:13:11,689 INFO L129 PetriNetUnfolder]: 9/140 cut-off events. [2022-07-12 10:13:11,689 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-12 10:13:11,700 INFO L84 FinitePrefix]: Finished finitePrefix Result has 145 conditions, 140 events. 9/140 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 243 event pairs, 0 based on Foata normal form. 0/128 useless extension candidates. Maximal degree in co-relation 99. Up to 2 conditions per place. [2022-07-12 10:13:11,700 INFO L82 GeneralOperation]: Start removeDead. Operand has 136 places, 141 transitions, 290 flow [2022-07-12 10:13:11,709 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 126 places, 131 transitions, 265 flow [2022-07-12 10:13:11,722 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:13:11,732 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@127421e6, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6652043d [2022-07-12 10:13:11,732 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-07-12 10:13:11,749 INFO L129 PetriNetUnfolder]: 2/54 cut-off events. [2022-07-12 10:13:11,749 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:13:11,753 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:13:11,753 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:13:11,754 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting reader_nowait_fnErr1ASSERT_VIOLATIONERROR_FUNCTION === [reader_nowait_fnErr1ASSERT_VIOLATIONERROR_FUNCTION, reader_nowait_fnErr2ASSERT_VIOLATIONERROR_FUNCTION, reader_nowait_fnErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-07-12 10:13:11,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:13:11,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1380320653, now seen corresponding path program 1 times [2022-07-12 10:13:11,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:13:11,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774870849] [2022-07-12 10:13:11,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:13:11,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:13:11,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:13:11,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:13:11,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:13:11,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774870849] [2022-07-12 10:13:11,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774870849] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:13:11,962 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:13:11,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 10:13:11,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870205373] [2022-07-12 10:13:11,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:13:11,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-12 10:13:11,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:13:11,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-12 10:13:11,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 10:13:11,995 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 141 [2022-07-12 10:13:11,997 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 131 transitions, 265 flow. Second operand has 2 states, 2 states have (on average 134.0) internal successors, (268), 2 states have internal predecessors, (268), 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) [2022-07-12 10:13:11,997 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:13:11,997 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 141 [2022-07-12 10:13:11,998 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:13:12,027 INFO L129 PetriNetUnfolder]: 3/125 cut-off events. [2022-07-12 10:13:12,027 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-12 10:13:12,028 INFO L84 FinitePrefix]: Finished finitePrefix Result has 131 conditions, 125 events. 3/125 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 207 event pairs, 0 based on Foata normal form. 6/125 useless extension candidates. Maximal degree in co-relation 93. Up to 2 conditions per place. [2022-07-12 10:13:12,030 INFO L132 encePairwiseOnDemand]: 135/141 looper letters, 1 selfloop transitions, 0 changer transitions 0/125 dead transitions. [2022-07-12 10:13:12,030 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 125 transitions, 255 flow [2022-07-12 10:13:12,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-12 10:13:12,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-12 10:13:12,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 273 transitions. [2022-07-12 10:13:12,041 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9680851063829787 [2022-07-12 10:13:12,041 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 273 transitions. [2022-07-12 10:13:12,042 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 273 transitions. [2022-07-12 10:13:12,043 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:13:12,045 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 273 transitions. [2022-07-12 10:13:12,048 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 136.5) internal successors, (273), 2 states have internal predecessors, (273), 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) [2022-07-12 10:13:12,051 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 141.0) internal successors, (423), 3 states have internal predecessors, (423), 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) [2022-07-12 10:13:12,052 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 141.0) internal successors, (423), 3 states have internal predecessors, (423), 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) [2022-07-12 10:13:12,054 INFO L186 Difference]: Start difference. First operand has 126 places, 131 transitions, 265 flow. Second operand 2 states and 273 transitions. [2022-07-12 10:13:12,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 125 transitions, 255 flow [2022-07-12 10:13:12,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 125 transitions, 254 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-12 10:13:12,060 INFO L242 Difference]: Finished difference. Result has 126 places, 125 transitions, 252 flow [2022-07-12 10:13:12,061 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=252, PETRI_PLACES=126, PETRI_TRANSITIONS=125} [2022-07-12 10:13:12,064 INFO L279 CegarLoopForPetriNet]: 126 programPoint places, 0 predicate places. [2022-07-12 10:13:12,065 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 125 transitions, 252 flow [2022-07-12 10:13:12,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 134.0) internal successors, (268), 2 states have internal predecessors, (268), 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) [2022-07-12 10:13:12,066 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:13:12,066 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:13:12,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 10:13:12,067 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting reader_nowait_fnErr1ASSERT_VIOLATIONERROR_FUNCTION === [reader_nowait_fnErr1ASSERT_VIOLATIONERROR_FUNCTION, reader_nowait_fnErr2ASSERT_VIOLATIONERROR_FUNCTION, reader_nowait_fnErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-07-12 10:13:12,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:13:12,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1380321614, now seen corresponding path program 1 times [2022-07-12 10:13:12,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:13:12,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283843069] [2022-07-12 10:13:12,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:13:12,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:13:12,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:13:12,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:13:12,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:13:12,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283843069] [2022-07-12 10:13:12,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283843069] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:13:12,156 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:13:12,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:13:12,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567044828] [2022-07-12 10:13:12,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:13:12,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:13:12,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:13:12,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:13:12,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:13:12,160 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 141 [2022-07-12 10:13:12,161 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 125 transitions, 252 flow. Second operand has 3 states, 3 states have (on average 129.0) internal successors, (387), 3 states have internal predecessors, (387), 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) [2022-07-12 10:13:12,161 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:13:12,161 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 141 [2022-07-12 10:13:12,161 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:13:12,233 INFO L129 PetriNetUnfolder]: 3/151 cut-off events. [2022-07-12 10:13:12,234 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:13:12,237 INFO L84 FinitePrefix]: Finished finitePrefix Result has 165 conditions, 151 events. 3/151 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 152 event pairs, 0 based on Foata normal form. 0/144 useless extension candidates. Maximal degree in co-relation 162. Up to 7 conditions per place. [2022-07-12 10:13:12,238 INFO L132 encePairwiseOnDemand]: 138/141 looper letters, 7 selfloop transitions, 2 changer transitions 0/128 dead transitions. [2022-07-12 10:13:12,238 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 128 transitions, 276 flow [2022-07-12 10:13:12,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:13:12,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:13:12,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 394 transitions. [2022-07-12 10:13:12,246 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9314420803782506 [2022-07-12 10:13:12,246 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 394 transitions. [2022-07-12 10:13:12,246 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 394 transitions. [2022-07-12 10:13:12,248 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:13:12,248 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 394 transitions. [2022-07-12 10:13:12,250 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 131.33333333333334) internal successors, (394), 3 states have internal predecessors, (394), 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) [2022-07-12 10:13:12,253 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 141.0) internal successors, (564), 4 states have internal predecessors, (564), 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) [2022-07-12 10:13:12,254 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 141.0) internal successors, (564), 4 states have internal predecessors, (564), 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) [2022-07-12 10:13:12,254 INFO L186 Difference]: Start difference. First operand has 126 places, 125 transitions, 252 flow. Second operand 3 states and 394 transitions. [2022-07-12 10:13:12,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 128 transitions, 276 flow [2022-07-12 10:13:12,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 128 transitions, 276 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:13:12,258 INFO L242 Difference]: Finished difference. Result has 129 places, 126 transitions, 264 flow [2022-07-12 10:13:12,258 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=141, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=264, PETRI_PLACES=129, PETRI_TRANSITIONS=126} [2022-07-12 10:13:12,259 INFO L279 CegarLoopForPetriNet]: 126 programPoint places, 3 predicate places. [2022-07-12 10:13:12,259 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 126 transitions, 264 flow [2022-07-12 10:13:12,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 129.0) internal successors, (387), 3 states have internal predecessors, (387), 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) [2022-07-12 10:13:12,260 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:13:12,260 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 10:13:12,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-12 10:13:12,260 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting reader_nowait_fnErr0ASSERT_VIOLATIONERROR_FUNCTION === [reader_nowait_fnErr1ASSERT_VIOLATIONERROR_FUNCTION, reader_nowait_fnErr2ASSERT_VIOLATIONERROR_FUNCTION, reader_nowait_fnErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-07-12 10:13:12,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:13:12,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1966319385, now seen corresponding path program 1 times [2022-07-12 10:13:12,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:13:12,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529776226] [2022-07-12 10:13:12,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:13:12,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:13:12,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:13:12,306 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:13:12,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:13:12,359 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:13:12,359 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:13:12,360 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location reader_nowait_fnErr0ASSERT_VIOLATIONERROR_FUNCTION (6 of 7 remaining) [2022-07-12 10:13:12,361 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location reader_nowait_fnErr1ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2022-07-12 10:13:12,362 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location reader_nowait_fnErr2ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2022-07-12 10:13:12,362 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location reader_nowait_fnErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2022-07-12 10:13:12,362 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 7 remaining) [2022-07-12 10:13:12,362 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location reader_nowait_fnErr1ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2022-07-12 10:13:12,363 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location reader_nowait_fnErr2ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2022-07-12 10:13:12,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-12 10:13:12,363 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-07-12 10:13:12,368 INFO L226 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-07-12 10:13:12,368 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-12 10:13:12,415 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.07 10:13:12 BasicIcfg [2022-07-12 10:13:12,415 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-12 10:13:12,416 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-12 10:13:12,416 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-12 10:13:12,416 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-12 10:13:12,417 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 10:13:11" (3/4) ... [2022-07-12 10:13:12,418 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-07-12 10:13:12,482 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2022-07-12 10:13:12,482 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-12 10:13:12,483 INFO L158 Benchmark]: Toolchain (without parser) took 1950.27ms. Allocated memory was 107.0MB in the beginning and 138.4MB in the end (delta: 31.5MB). Free memory was 70.5MB in the beginning and 77.2MB in the end (delta: -6.7MB). Peak memory consumption was 23.9MB. Max. memory is 16.1GB. [2022-07-12 10:13:12,483 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 107.0MB. Free memory was 81.8MB in the beginning and 81.8MB in the end (delta: 18.4kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-12 10:13:12,483 INFO L158 Benchmark]: CACSL2BoogieTranslator took 480.80ms. Allocated memory is still 107.0MB. Free memory was 70.2MB in the beginning and 66.8MB in the end (delta: 3.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-07-12 10:13:12,484 INFO L158 Benchmark]: Boogie Procedure Inliner took 70.12ms. Allocated memory is still 107.0MB. Free memory was 66.8MB in the beginning and 64.2MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-12 10:13:12,484 INFO L158 Benchmark]: Boogie Preprocessor took 37.85ms. Allocated memory is still 107.0MB. Free memory was 64.2MB in the beginning and 62.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-12 10:13:12,485 INFO L158 Benchmark]: RCFGBuilder took 338.87ms. Allocated memory is still 107.0MB. Free memory was 62.6MB in the beginning and 48.0MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-07-12 10:13:12,485 INFO L158 Benchmark]: TraceAbstraction took 948.99ms. Allocated memory was 107.0MB in the beginning and 138.4MB in the end (delta: 31.5MB). Free memory was 47.4MB in the beginning and 85.6MB in the end (delta: -38.2MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-12 10:13:12,485 INFO L158 Benchmark]: Witness Printer took 65.89ms. Allocated memory is still 138.4MB. Free memory was 85.6MB in the beginning and 77.2MB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-12 10:13:12,487 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 107.0MB. Free memory was 81.8MB in the beginning and 81.8MB in the end (delta: 18.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 480.80ms. Allocated memory is still 107.0MB. Free memory was 70.2MB in the beginning and 66.8MB in the end (delta: 3.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 70.12ms. Allocated memory is still 107.0MB. Free memory was 66.8MB in the beginning and 64.2MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 37.85ms. Allocated memory is still 107.0MB. Free memory was 64.2MB in the beginning and 62.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 338.87ms. Allocated memory is still 107.0MB. Free memory was 62.6MB in the beginning and 48.0MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 948.99ms. Allocated memory was 107.0MB in the beginning and 138.4MB in the end (delta: 31.5MB). Free memory was 47.4MB in the beginning and 85.6MB in the end (delta: -38.2MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 65.89ms. Allocated memory is still 138.4MB. Free memory was 85.6MB in the beginning and 77.2MB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 855]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L864] 0 pthread_t reader; VAL [reader={9:0}] [L865] 0 Ring r; VAL [r={8:0}, reader={9:0}] [L866] CALL 0 ring_init( &r ) [L823] EXPR 0 r->writer = 0 VAL [r={8:0}, r={8:0}] [L823] 0 r->reader = r->writer = 0 VAL [r={8:0}, r={8:0}] [L866] RET 0 ring_init( &r ) [L867] FCALL, FORK 0 pthread_create( &reader, ((void *)0), &reader_nowait_fn, &r ) VAL [pthread_create( &reader, ((void *)0), &reader_nowait_fn, &r )=-1, r={8:0}, reader={9:0}] [L851] 1 Ring *r = arg; VAL [arg={8:0}, arg={8:0}, r={8:0}] [L852] 1 long val = 0, last = 0, i = 0; VAL [arg={8:0}, arg={8:0}, i=0, last=0, r={8:0}, val=0] [L853] COND TRUE 1 i < 8 VAL [arg={8:0}, arg={8:0}, i=0, last=0, r={8:0}, val=0] [L854] CALL, EXPR 1 ring_dequeue( r ) [L815] EXPR 1 r->reader VAL [r={8:0}, r={8:0}, r->reader=0] [L815] EXPR 1 r->q[ r->reader ] VAL [r={8:0}, r={8:0}, r->q[ r->reader ]=-2, r->reader=0] [L815] 1 long x = r->q[ r->reader ]; VAL [r={8:0}, r={8:0}, r->q[ r->reader ]=-2, r->reader=0, x=-2] [L816] EXPR 1 r->reader VAL [r={8:0}, r={8:0}, r->reader=0, x=-2] [L816] 1 r->reader = (r->reader + 1) % 4 VAL [r={8:0}, r={8:0}, r->reader=0, x=-2] [L817] 1 return x; VAL [\result=-2, r={8:0}, r={8:0}, x=-2] [L854] RET, EXPR 1 ring_dequeue( r ) [L854] 1 val = ring_dequeue( r ) VAL [arg={8:0}, arg={8:0}, i=0, last=0, r={8:0}, ring_dequeue( r )=-2, val=-2] [L855] 1 !(val == last + 1) ? reach_error() : (void)0 VAL [arg={8:0}, arg={8:0}, i=0, last=0, r={8:0}, val=-2] [L855] 1 reach_error() VAL [arg={8:0}, arg={8:0}, i=0, last=0, r={8:0}, val=-2] - UnprovableResult [Line: 859]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 860]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 867]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 3 procedures, 188 locations, 7 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 0.7s, OverallIterations: 3, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2 mSDsluCounter, 2 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 0 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 10 IncrementalHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 0 mSolverCounterUnsat, 2 mSDtfsCounter, 10 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=265occurred in iteration=0, InterpolantAutomatonStates: 5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 139 NumberOfCodeBlocks, 139 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 78 ConstructedInterpolants, 0 QuantifiedInterpolants, 80 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-07-12 10:13:12,515 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE