./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 791161d1 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-?-791161d [2022-07-22 21:30:01,680 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 21:30:01,682 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 21:30:01,713 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 21:30:01,714 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 21:30:01,715 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 21:30:01,719 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 21:30:01,724 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 21:30:01,726 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 21:30:01,731 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 21:30:01,732 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 21:30:01,734 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 21:30:01,734 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 21:30:01,736 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 21:30:01,737 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 21:30:01,738 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 21:30:01,739 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 21:30:01,740 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 21:30:01,743 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 21:30:01,748 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 21:30:01,750 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 21:30:01,751 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 21:30:01,752 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 21:30:01,753 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 21:30:01,754 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 21:30:01,756 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 21:30:01,756 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 21:30:01,757 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 21:30:01,758 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 21:30:01,758 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 21:30:01,759 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 21:30:01,759 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 21:30:01,760 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 21:30:01,761 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 21:30:01,761 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 21:30:01,762 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 21:30:01,762 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 21:30:01,762 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 21:30:01,763 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 21:30:01,763 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 21:30:01,763 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 21:30:01,765 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 21:30:01,766 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 21:30:01,793 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 21:30:01,794 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 21:30:01,794 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 21:30:01,794 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 21:30:01,795 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 21:30:01,795 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 21:30:01,796 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 21:30:01,796 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 21:30:01,796 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 21:30:01,797 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 21:30:01,797 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 21:30:01,797 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 21:30:01,797 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 21:30:01,797 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 21:30:01,798 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 21:30:01,798 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 21:30:01,798 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 21:30:01,798 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 21:30:01,798 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 21:30:01,798 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 21:30:01,798 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 21:30:01,799 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 21:30:01,799 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 21:30:01,799 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 21:30:01,799 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:30:01,799 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 21:30:01,799 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 21:30:01,800 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 21:30:01,800 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 21:30:01,800 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 21:30:01,800 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 21:30:01,800 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 21:30:01,801 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 21:30:01,801 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3a956b76a4ba98ce13df4d83ef2fb7ffa0973225ecb152c14bcfbb55b6546601 [2022-07-22 21:30:02,003 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 21:30:02,026 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 21:30:02,027 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 21:30:02,028 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 21:30:02,029 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 21:30:02,030 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-divine/ring_1w1r-1.i [2022-07-22 21:30:02,074 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3e2f8a868/48947f9b93ce4fff88e8838c39c46bad/FLAG63d5d4403 [2022-07-22 21:30:02,559 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 21:30:02,560 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-divine/ring_1w1r-1.i [2022-07-22 21:30:02,570 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3e2f8a868/48947f9b93ce4fff88e8838c39c46bad/FLAG63d5d4403 [2022-07-22 21:30:03,054 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3e2f8a868/48947f9b93ce4fff88e8838c39c46bad [2022-07-22 21:30:03,055 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 21:30:03,056 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 21:30:03,057 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 21:30:03,057 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 21:30:03,059 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 21:30:03,060 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:30:03" (1/1) ... [2022-07-22 21:30:03,060 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1efd1d01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:30:03, skipping insertion in model container [2022-07-22 21:30:03,060 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:30:03" (1/1) ... [2022-07-22 21:30:03,065 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 21:30:03,099 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 21:30:03,253 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-07-22 21:30:03,431 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] [2022-07-22 21:30:03,434 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] [2022-07-22 21:30:03,435 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] [2022-07-22 21:30:03,441 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] [2022-07-22 21:30:03,442 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] [2022-07-22 21:30:03,444 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] [2022-07-22 21:30:03,448 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:30:03,454 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 21:30:03,466 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-07-22 21:30:03,489 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] [2022-07-22 21:30:03,489 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] [2022-07-22 21:30:03,490 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] [2022-07-22 21:30:03,491 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] [2022-07-22 21:30:03,492 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] [2022-07-22 21:30:03,492 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] [2022-07-22 21:30:03,494 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:30:03,525 INFO L208 MainTranslator]: Completed translation [2022-07-22 21:30:03,526 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:30:03 WrapperNode [2022-07-22 21:30:03,526 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 21:30:03,527 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 21:30:03,527 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 21:30:03,528 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 21:30:03,533 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:30:03" (1/1) ... [2022-07-22 21:30:03,559 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:30:03" (1/1) ... [2022-07-22 21:30:03,575 INFO L137 Inliner]: procedures = 225, calls = 43, calls flagged for inlining = 10, calls inlined = 7, statements flattened = 113 [2022-07-22 21:30:03,576 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 21:30:03,577 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 21:30:03,577 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 21:30:03,577 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 21:30:03,583 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:30:03" (1/1) ... [2022-07-22 21:30:03,583 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:30:03" (1/1) ... [2022-07-22 21:30:03,585 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:30:03" (1/1) ... [2022-07-22 21:30:03,585 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:30:03" (1/1) ... [2022-07-22 21:30:03,590 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:30:03" (1/1) ... [2022-07-22 21:30:03,593 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:30:03" (1/1) ... [2022-07-22 21:30:03,594 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:30:03" (1/1) ... [2022-07-22 21:30:03,596 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 21:30:03,597 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 21:30:03,597 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 21:30:03,597 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 21:30:03,598 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:30:03" (1/1) ... [2022-07-22 21:30:03,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:30:03,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:30:03,649 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) [2022-07-22 21:30:03,655 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 [2022-07-22 21:30:03,679 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-22 21:30:03,679 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-22 21:30:03,679 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-22 21:30:03,679 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-22 21:30:03,679 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 21:30:03,680 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 21:30:03,680 INFO L130 BoogieDeclarations]: Found specification of procedure reader_nowait_fn [2022-07-22 21:30:03,680 INFO L138 BoogieDeclarations]: Found implementation of procedure reader_nowait_fn [2022-07-22 21:30:03,680 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 21:30:03,680 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 21:30:03,681 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-22 21:30:03,836 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 21:30:03,837 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 21:30:04,164 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 21:30:04,170 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 21:30:04,172 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-22 21:30:04,174 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:30:04 BoogieIcfgContainer [2022-07-22 21:30:04,175 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 21:30:04,177 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 21:30:04,177 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 21:30:04,181 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 21:30:04,181 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 09:30:03" (1/3) ... [2022-07-22 21:30:04,182 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8694282 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:30:04, skipping insertion in model container [2022-07-22 21:30:04,182 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:30:03" (2/3) ... [2022-07-22 21:30:04,183 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8694282 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:30:04, skipping insertion in model container [2022-07-22 21:30:04,183 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:30:04" (3/3) ... [2022-07-22 21:30:04,184 INFO L111 eAbstractionObserver]: Analyzing ICFG ring_1w1r-1.i [2022-07-22 21:30:04,188 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-22 21:30:04,195 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 21:30:04,196 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2022-07-22 21:30:04,196 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-22 21:30:04,270 INFO L135 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-07-22 21:30:04,310 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 136 places, 141 transitions, 290 flow [2022-07-22 21:30:04,370 INFO L129 PetriNetUnfolder]: 9/140 cut-off events. [2022-07-22 21:30:04,372 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-22 21:30:04,376 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. [2022-07-22 21:30:04,377 INFO L82 GeneralOperation]: Start removeDead. Operand has 136 places, 141 transitions, 290 flow [2022-07-22 21:30:04,384 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 126 places, 131 transitions, 265 flow [2022-07-22 21:30:04,399 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:30:04,405 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@419f8620, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@c842bf3 [2022-07-22 21:30:04,405 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-07-22 21:30:04,427 INFO L129 PetriNetUnfolder]: 2/54 cut-off events. [2022-07-22 21:30:04,428 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-22 21:30:04,428 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:30:04,429 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] [2022-07-22 21:30:04,430 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)] === [2022-07-22 21:30:04,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:30:04,434 INFO L85 PathProgramCache]: Analyzing trace with hash 1380320653, now seen corresponding path program 1 times [2022-07-22 21:30:04,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:30:04,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303624029] [2022-07-22 21:30:04,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:30:04,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:30:04,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:30:04,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:30:04,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:30:04,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303624029] [2022-07-22 21:30:04,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303624029] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:30:04,640 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:30:04,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 21:30:04,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043194037] [2022-07-22 21:30:04,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:30:04,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 21:30:04,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:30:04,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 21:30:04,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 21:30:04,679 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 141 [2022-07-22 21:30:04,683 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) [2022-07-22 21:30:04,683 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:30:04,684 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 141 [2022-07-22 21:30:04,685 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:30:04,731 INFO L129 PetriNetUnfolder]: 3/125 cut-off events. [2022-07-22 21:30:04,731 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-22 21:30:04,733 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. [2022-07-22 21:30:04,735 INFO L132 encePairwiseOnDemand]: 135/141 looper letters, 1 selfloop transitions, 0 changer transitions 0/125 dead transitions. [2022-07-22 21:30:04,735 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 125 transitions, 255 flow [2022-07-22 21:30:04,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 21:30:04,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-22 21:30:04,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 273 transitions. [2022-07-22 21:30:04,750 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9680851063829787 [2022-07-22 21:30:04,751 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 273 transitions. [2022-07-22 21:30:04,752 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 273 transitions. [2022-07-22 21:30:04,754 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:30:04,756 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 273 transitions. [2022-07-22 21:30:04,761 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) [2022-07-22 21:30:04,769 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) [2022-07-22 21:30:04,769 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) [2022-07-22 21:30:04,771 INFO L186 Difference]: Start difference. First operand has 126 places, 131 transitions, 265 flow. Second operand 2 states and 273 transitions. [2022-07-22 21:30:04,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 125 transitions, 255 flow [2022-07-22 21:30:04,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 125 transitions, 254 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-22 21:30:04,777 INFO L242 Difference]: Finished difference. Result has 126 places, 125 transitions, 252 flow [2022-07-22 21:30:04,778 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} [2022-07-22 21:30:04,781 INFO L279 CegarLoopForPetriNet]: 126 programPoint places, 0 predicate places. [2022-07-22 21:30:04,782 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 125 transitions, 252 flow [2022-07-22 21:30:04,782 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) [2022-07-22 21:30:04,783 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:30:04,783 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] [2022-07-22 21:30:04,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 21:30:04,784 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)] === [2022-07-22 21:30:04,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:30:04,785 INFO L85 PathProgramCache]: Analyzing trace with hash 1380321614, now seen corresponding path program 1 times [2022-07-22 21:30:04,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:30:04,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571632287] [2022-07-22 21:30:04,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:30:04,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:30:04,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:30:04,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:30:04,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:30:04,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571632287] [2022-07-22 21:30:04,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571632287] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:30:04,871 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:30:04,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 21:30:04,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815440744] [2022-07-22 21:30:04,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:30:04,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:30:04,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:30:04,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:30:04,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 21:30:04,876 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 141 [2022-07-22 21:30:04,876 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) [2022-07-22 21:30:04,877 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:30:04,877 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 141 [2022-07-22 21:30:04,877 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:30:04,924 INFO L129 PetriNetUnfolder]: 3/151 cut-off events. [2022-07-22 21:30:04,925 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-22 21:30:04,927 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. [2022-07-22 21:30:04,928 INFO L132 encePairwiseOnDemand]: 138/141 looper letters, 7 selfloop transitions, 2 changer transitions 0/128 dead transitions. [2022-07-22 21:30:04,928 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 128 transitions, 276 flow [2022-07-22 21:30:04,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:30:04,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:30:04,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 394 transitions. [2022-07-22 21:30:04,930 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9314420803782506 [2022-07-22 21:30:04,930 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 394 transitions. [2022-07-22 21:30:04,930 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 394 transitions. [2022-07-22 21:30:04,931 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:30:04,931 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 394 transitions. [2022-07-22 21:30:04,932 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) [2022-07-22 21:30:04,934 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) [2022-07-22 21:30:04,935 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) [2022-07-22 21:30:04,935 INFO L186 Difference]: Start difference. First operand has 126 places, 125 transitions, 252 flow. Second operand 3 states and 394 transitions. [2022-07-22 21:30:04,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 128 transitions, 276 flow [2022-07-22 21:30:04,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 128 transitions, 276 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-22 21:30:04,940 INFO L242 Difference]: Finished difference. Result has 129 places, 126 transitions, 264 flow [2022-07-22 21:30:04,940 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} [2022-07-22 21:30:04,941 INFO L279 CegarLoopForPetriNet]: 126 programPoint places, 3 predicate places. [2022-07-22 21:30:04,941 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 126 transitions, 264 flow [2022-07-22 21:30:04,942 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) [2022-07-22 21:30:04,942 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:30:04,942 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] [2022-07-22 21:30:04,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 21:30:04,943 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)] === [2022-07-22 21:30:04,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:30:04,943 INFO L85 PathProgramCache]: Analyzing trace with hash 1966319385, now seen corresponding path program 1 times [2022-07-22 21:30:04,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:30:04,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816611379] [2022-07-22 21:30:04,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:30:04,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:30:05,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:30:05,004 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 21:30:05,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 21:30:05,067 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 21:30:05,067 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-22 21:30:05,069 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location reader_nowait_fnErr0ASSERT_VIOLATIONERROR_FUNCTION (6 of 7 remaining) [2022-07-22 21:30:05,070 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location reader_nowait_fnErr1ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2022-07-22 21:30:05,071 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location reader_nowait_fnErr2ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2022-07-22 21:30:05,071 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location reader_nowait_fnErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2022-07-22 21:30:05,071 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 7 remaining) [2022-07-22 21:30:05,071 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location reader_nowait_fnErr1ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2022-07-22 21:30:05,072 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location reader_nowait_fnErr2ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2022-07-22 21:30:05,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-22 21:30:05,072 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-07-22 21:30:05,079 INFO L226 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-07-22 21:30:05,079 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-22 21:30:05,133 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.07 09:30:05 BasicIcfg [2022-07-22 21:30:05,134 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-22 21:30:05,134 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-22 21:30:05,134 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-22 21:30:05,135 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-22 21:30:05,136 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:30:04" (3/4) ... [2022-07-22 21:30:05,138 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-07-22 21:30:05,182 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2022-07-22 21:30:05,182 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-22 21:30:05,183 INFO L158 Benchmark]: Toolchain (without parser) took 2126.56ms. Allocated memory was 111.1MB in the beginning and 176.2MB in the end (delta: 65.0MB). Free memory was 80.0MB in the beginning and 113.5MB in the end (delta: -33.5MB). Peak memory consumption was 30.7MB. Max. memory is 16.1GB. [2022-07-22 21:30:05,183 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 111.1MB. Free memory is still 65.8MB. There was no memory consumed. Max. memory is 16.1GB. [2022-07-22 21:30:05,184 INFO L158 Benchmark]: CACSL2BoogieTranslator took 469.67ms. Allocated memory is still 111.1MB. Free memory was 79.7MB in the beginning and 69.6MB in the end (delta: 10.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-07-22 21:30:05,184 INFO L158 Benchmark]: Boogie Procedure Inliner took 48.91ms. Allocated memory is still 111.1MB. Free memory was 69.6MB in the beginning and 67.1MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-22 21:30:05,184 INFO L158 Benchmark]: Boogie Preprocessor took 19.61ms. Allocated memory is still 111.1MB. Free memory was 67.1MB in the beginning and 65.4MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-22 21:30:05,185 INFO L158 Benchmark]: RCFGBuilder took 578.84ms. Allocated memory was 111.1MB in the beginning and 176.2MB in the end (delta: 65.0MB). Free memory was 65.4MB in the beginning and 148.7MB in the end (delta: -83.3MB). Peak memory consumption was 15.6MB. Max. memory is 16.1GB. [2022-07-22 21:30:05,185 INFO L158 Benchmark]: TraceAbstraction took 957.15ms. Allocated memory is still 176.2MB. Free memory was 147.8MB in the beginning and 120.8MB in the end (delta: 27.0MB). Peak memory consumption was 26.8MB. Max. memory is 16.1GB. [2022-07-22 21:30:05,186 INFO L158 Benchmark]: Witness Printer took 48.01ms. Allocated memory is still 176.2MB. Free memory was 120.8MB in the beginning and 113.5MB in the end (delta: 7.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-07-22 21:30:05,187 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 111.1MB. Free memory is still 65.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 469.67ms. Allocated memory is still 111.1MB. Free memory was 79.7MB in the beginning and 69.6MB in the end (delta: 10.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 48.91ms. Allocated memory is still 111.1MB. Free memory was 69.6MB in the beginning and 67.1MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 19.61ms. Allocated memory is still 111.1MB. Free memory was 67.1MB in the beginning and 65.4MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 578.84ms. Allocated memory was 111.1MB in the beginning and 176.2MB in the end (delta: 65.0MB). Free memory was 65.4MB in the beginning and 148.7MB in the end (delta: -83.3MB). Peak memory consumption was 15.6MB. Max. memory is 16.1GB. * TraceAbstraction took 957.15ms. Allocated memory is still 176.2MB. Free memory was 147.8MB in the beginning and 120.8MB in the end (delta: 27.0MB). Peak memory consumption was 26.8MB. Max. memory is 16.1GB. * Witness Printer took 48.01ms. Allocated memory is still 176.2MB. Free memory was 120.8MB in the beginning and 113.5MB in the end (delta: 7.3MB). Peak memory consumption was 6.3MB. 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: 0.8s, 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! [2022-07-22 21:30:05,223 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, 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