./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 eb692b52 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-?-eb692b5 [2022-07-19 21:15:01,170 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 21:15:01,175 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 21:15:01,218 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 21:15:01,218 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 21:15:01,219 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 21:15:01,220 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 21:15:01,222 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 21:15:01,223 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 21:15:01,224 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 21:15:01,225 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 21:15:01,225 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 21:15:01,226 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 21:15:01,227 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 21:15:01,227 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 21:15:01,228 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 21:15:01,229 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 21:15:01,231 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 21:15:01,232 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 21:15:01,236 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 21:15:01,242 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 21:15:01,243 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 21:15:01,244 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 21:15:01,244 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 21:15:01,245 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 21:15:01,248 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 21:15:01,251 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 21:15:01,251 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 21:15:01,252 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 21:15:01,253 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 21:15:01,253 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 21:15:01,254 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 21:15:01,255 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 21:15:01,256 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 21:15:01,256 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 21:15:01,257 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 21:15:01,257 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 21:15:01,258 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 21:15:01,258 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 21:15:01,259 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 21:15:01,259 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 21:15:01,261 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 21:15:01,262 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 21:15:01,288 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 21:15:01,289 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 21:15:01,289 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 21:15:01,289 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 21:15:01,290 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 21:15:01,290 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 21:15:01,291 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 21:15:01,291 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 21:15:01,291 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 21:15:01,292 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 21:15:01,292 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 21:15:01,292 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 21:15:01,292 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 21:15:01,293 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 21:15:01,293 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 21:15:01,293 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 21:15:01,293 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 21:15:01,293 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 21:15:01,294 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 21:15:01,294 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 21:15:01,294 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 21:15:01,294 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 21:15:01,294 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 21:15:01,294 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 21:15:01,295 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:15:01,295 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 21:15:01,295 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 21:15:01,295 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 21:15:01,295 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 21:15:01,296 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 21:15:01,296 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 21:15:01,296 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 21:15:01,296 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 21:15:01,296 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3a956b76a4ba98ce13df4d83ef2fb7ffa0973225ecb152c14bcfbb55b6546601 [2022-07-19 21:15:01,525 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 21:15:01,548 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 21:15:01,550 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 21:15:01,551 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 21:15:01,551 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 21:15:01,552 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-divine/ring_1w1r-1.i [2022-07-19 21:15:01,597 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1e2ab78b1/2974a8752f0349318e10d95e517fadec/FLAGf6dd261c9 [2022-07-19 21:15:02,062 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 21:15:02,063 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-divine/ring_1w1r-1.i [2022-07-19 21:15:02,094 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1e2ab78b1/2974a8752f0349318e10d95e517fadec/FLAGf6dd261c9 [2022-07-19 21:15:02,418 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1e2ab78b1/2974a8752f0349318e10d95e517fadec [2022-07-19 21:15:02,421 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 21:15:02,423 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 21:15:02,426 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 21:15:02,426 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 21:15:02,428 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 21:15:02,429 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:15:02" (1/1) ... [2022-07-19 21:15:02,430 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20b3548f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:15:02, skipping insertion in model container [2022-07-19 21:15:02,430 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:15:02" (1/1) ... [2022-07-19 21:15:02,436 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 21:15:02,472 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 21:15:02,606 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-07-19 21:15:02,766 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] [2022-07-19 21:15:02,772 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] [2022-07-19 21:15:02,773 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] [2022-07-19 21:15:02,777 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] [2022-07-19 21:15:02,778 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] [2022-07-19 21:15:02,778 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] [2022-07-19 21:15:02,782 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:15:02,787 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 21:15:02,796 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-07-19 21:15:02,824 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] [2022-07-19 21:15:02,826 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] [2022-07-19 21:15:02,827 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] [2022-07-19 21:15:02,834 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] [2022-07-19 21:15:02,836 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] [2022-07-19 21:15:02,837 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] [2022-07-19 21:15:02,839 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:15:02,880 INFO L208 MainTranslator]: Completed translation [2022-07-19 21:15:02,881 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:15:02 WrapperNode [2022-07-19 21:15:02,882 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 21:15:02,883 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 21:15:02,884 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 21:15:02,884 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 21:15:02,891 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:15:02" (1/1) ... [2022-07-19 21:15:02,917 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:15:02" (1/1) ... [2022-07-19 21:15:02,938 INFO L137 Inliner]: procedures = 225, calls = 43, calls flagged for inlining = 10, calls inlined = 7, statements flattened = 113 [2022-07-19 21:15:02,940 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 21:15:02,942 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 21:15:02,943 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 21:15:02,943 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 21:15:02,950 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:15:02" (1/1) ... [2022-07-19 21:15:02,952 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:15:02" (1/1) ... [2022-07-19 21:15:02,966 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:15:02" (1/1) ... [2022-07-19 21:15:02,968 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:15:02" (1/1) ... [2022-07-19 21:15:02,978 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:15:02" (1/1) ... [2022-07-19 21:15:02,993 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:15:02" (1/1) ... [2022-07-19 21:15:02,995 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:15:02" (1/1) ... [2022-07-19 21:15:02,997 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 21:15:03,003 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 21:15:03,003 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 21:15:03,003 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 21:15:03,004 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:15:02" (1/1) ... [2022-07-19 21:15:03,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:15:03,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:15:03,032 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) [2022-07-19 21:15:03,034 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 [2022-07-19 21:15:03,074 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-19 21:15:03,074 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-19 21:15:03,075 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-19 21:15:03,075 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-19 21:15:03,075 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 21:15:03,075 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 21:15:03,075 INFO L130 BoogieDeclarations]: Found specification of procedure reader_nowait_fn [2022-07-19 21:15:03,075 INFO L138 BoogieDeclarations]: Found implementation of procedure reader_nowait_fn [2022-07-19 21:15:03,075 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 21:15:03,075 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 21:15:03,076 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-19 21:15:03,212 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 21:15:03,213 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 21:15:03,425 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 21:15:03,433 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 21:15:03,433 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-19 21:15:03,435 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:15:03 BoogieIcfgContainer [2022-07-19 21:15:03,435 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 21:15:03,437 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 21:15:03,437 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 21:15:03,440 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 21:15:03,440 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 09:15:02" (1/3) ... [2022-07-19 21:15:03,441 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f848849 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:15:03, skipping insertion in model container [2022-07-19 21:15:03,441 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:15:02" (2/3) ... [2022-07-19 21:15:03,441 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f848849 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:15:03, skipping insertion in model container [2022-07-19 21:15:03,441 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:15:03" (3/3) ... [2022-07-19 21:15:03,442 INFO L111 eAbstractionObserver]: Analyzing ICFG ring_1w1r-1.i [2022-07-19 21:15:03,447 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-19 21:15:03,455 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 21:15:03,455 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2022-07-19 21:15:03,455 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-19 21:15:03,506 INFO L135 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-07-19 21:15:03,551 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 136 places, 141 transitions, 290 flow [2022-07-19 21:15:03,618 INFO L129 PetriNetUnfolder]: 9/140 cut-off events. [2022-07-19 21:15:03,618 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-19 21:15:03,642 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. [2022-07-19 21:15:03,642 INFO L82 GeneralOperation]: Start removeDead. Operand has 136 places, 141 transitions, 290 flow [2022-07-19 21:15:03,659 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 126 places, 131 transitions, 265 flow [2022-07-19 21:15:03,678 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:15:03,685 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@1ac20937, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@94bffa3 [2022-07-19 21:15:03,685 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-07-19 21:15:03,707 INFO L129 PetriNetUnfolder]: 2/54 cut-off events. [2022-07-19 21:15:03,708 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:15:03,708 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:15:03,708 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] [2022-07-19 21:15:03,709 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)] === [2022-07-19 21:15:03,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:15:03,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1380320653, now seen corresponding path program 1 times [2022-07-19 21:15:03,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:15:03,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707192866] [2022-07-19 21:15:03,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:15:03,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:15:03,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:15:03,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:15:03,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:15:03,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707192866] [2022-07-19 21:15:03,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707192866] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:15:03,950 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:15:03,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 21:15:03,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488237521] [2022-07-19 21:15:03,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:15:03,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 21:15:03,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:15:03,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 21:15:03,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 21:15:03,984 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 141 [2022-07-19 21:15:03,987 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) [2022-07-19 21:15:03,987 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:15:03,987 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 141 [2022-07-19 21:15:03,988 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:15:04,018 INFO L129 PetriNetUnfolder]: 3/125 cut-off events. [2022-07-19 21:15:04,018 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-19 21:15:04,019 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. [2022-07-19 21:15:04,021 INFO L132 encePairwiseOnDemand]: 135/141 looper letters, 1 selfloop transitions, 0 changer transitions 0/125 dead transitions. [2022-07-19 21:15:04,021 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 125 transitions, 255 flow [2022-07-19 21:15:04,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 21:15:04,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-19 21:15:04,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 273 transitions. [2022-07-19 21:15:04,032 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9680851063829787 [2022-07-19 21:15:04,033 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 273 transitions. [2022-07-19 21:15:04,033 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 273 transitions. [2022-07-19 21:15:04,034 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:15:04,036 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 273 transitions. [2022-07-19 21:15:04,046 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) [2022-07-19 21:15:04,050 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) [2022-07-19 21:15:04,050 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) [2022-07-19 21:15:04,052 INFO L186 Difference]: Start difference. First operand has 126 places, 131 transitions, 265 flow. Second operand 2 states and 273 transitions. [2022-07-19 21:15:04,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 125 transitions, 255 flow [2022-07-19 21:15:04,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 125 transitions, 254 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-19 21:15:04,059 INFO L242 Difference]: Finished difference. Result has 126 places, 125 transitions, 252 flow [2022-07-19 21:15:04,061 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} [2022-07-19 21:15:04,064 INFO L279 CegarLoopForPetriNet]: 126 programPoint places, 0 predicate places. [2022-07-19 21:15:04,065 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 125 transitions, 252 flow [2022-07-19 21:15:04,065 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) [2022-07-19 21:15:04,065 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:15:04,065 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] [2022-07-19 21:15:04,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 21:15:04,066 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)] === [2022-07-19 21:15:04,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:15:04,066 INFO L85 PathProgramCache]: Analyzing trace with hash 1380321614, now seen corresponding path program 1 times [2022-07-19 21:15:04,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:15:04,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514081227] [2022-07-19 21:15:04,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:15:04,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:15:04,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:15:04,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:15:04,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:15:04,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514081227] [2022-07-19 21:15:04,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514081227] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:15:04,156 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:15:04,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 21:15:04,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357809386] [2022-07-19 21:15:04,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:15:04,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 21:15:04,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:15:04,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 21:15:04,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 21:15:04,162 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 141 [2022-07-19 21:15:04,164 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) [2022-07-19 21:15:04,164 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:15:04,165 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 141 [2022-07-19 21:15:04,165 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:15:04,230 INFO L129 PetriNetUnfolder]: 3/151 cut-off events. [2022-07-19 21:15:04,231 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-19 21:15:04,234 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. [2022-07-19 21:15:04,235 INFO L132 encePairwiseOnDemand]: 138/141 looper letters, 7 selfloop transitions, 2 changer transitions 0/128 dead transitions. [2022-07-19 21:15:04,236 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 128 transitions, 276 flow [2022-07-19 21:15:04,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 21:15:04,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-19 21:15:04,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 394 transitions. [2022-07-19 21:15:04,242 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9314420803782506 [2022-07-19 21:15:04,242 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 394 transitions. [2022-07-19 21:15:04,243 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 394 transitions. [2022-07-19 21:15:04,244 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:15:04,244 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 394 transitions. [2022-07-19 21:15:04,246 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) [2022-07-19 21:15:04,250 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) [2022-07-19 21:15:04,251 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) [2022-07-19 21:15:04,252 INFO L186 Difference]: Start difference. First operand has 126 places, 125 transitions, 252 flow. Second operand 3 states and 394 transitions. [2022-07-19 21:15:04,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 128 transitions, 276 flow [2022-07-19 21:15:04,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 128 transitions, 276 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-19 21:15:04,257 INFO L242 Difference]: Finished difference. Result has 129 places, 126 transitions, 264 flow [2022-07-19 21:15:04,258 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} [2022-07-19 21:15:04,259 INFO L279 CegarLoopForPetriNet]: 126 programPoint places, 3 predicate places. [2022-07-19 21:15:04,259 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 126 transitions, 264 flow [2022-07-19 21:15:04,259 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) [2022-07-19 21:15:04,259 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:15:04,260 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] [2022-07-19 21:15:04,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 21:15:04,260 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)] === [2022-07-19 21:15:04,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:15:04,262 INFO L85 PathProgramCache]: Analyzing trace with hash 1966319385, now seen corresponding path program 1 times [2022-07-19 21:15:04,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:15:04,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883749676] [2022-07-19 21:15:04,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:15:04,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:15:04,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:15:04,312 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 21:15:04,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 21:15:04,356 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 21:15:04,356 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 21:15:04,357 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location reader_nowait_fnErr0ASSERT_VIOLATIONERROR_FUNCTION (6 of 7 remaining) [2022-07-19 21:15:04,358 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location reader_nowait_fnErr1ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2022-07-19 21:15:04,359 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location reader_nowait_fnErr2ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2022-07-19 21:15:04,359 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location reader_nowait_fnErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2022-07-19 21:15:04,359 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 7 remaining) [2022-07-19 21:15:04,360 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location reader_nowait_fnErr1ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2022-07-19 21:15:04,360 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location reader_nowait_fnErr2ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2022-07-19 21:15:04,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-19 21:15:04,360 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-07-19 21:15:04,365 INFO L226 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-07-19 21:15:04,365 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-19 21:15:04,418 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.07 09:15:04 BasicIcfg [2022-07-19 21:15:04,418 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-19 21:15:04,419 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-19 21:15:04,419 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-19 21:15:04,419 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-19 21:15:04,420 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:15:03" (3/4) ... [2022-07-19 21:15:04,421 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-07-19 21:15:04,465 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2022-07-19 21:15:04,465 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-19 21:15:04,466 INFO L158 Benchmark]: Toolchain (without parser) took 2043.24ms. Allocated memory was 104.9MB in the beginning and 127.9MB in the end (delta: 23.1MB). Free memory was 72.5MB in the beginning and 58.0MB in the end (delta: 14.5MB). Peak memory consumption was 37.2MB. Max. memory is 16.1GB. [2022-07-19 21:15:04,466 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 79.7MB. Free memory is still 43.8MB. There was no memory consumed. Max. memory is 16.1GB. [2022-07-19 21:15:04,467 INFO L158 Benchmark]: CACSL2BoogieTranslator took 456.69ms. Allocated memory is still 104.9MB. Free memory was 72.3MB in the beginning and 64.7MB in the end (delta: 7.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-07-19 21:15:04,467 INFO L158 Benchmark]: Boogie Procedure Inliner took 58.00ms. Allocated memory is still 104.9MB. Free memory was 64.7MB in the beginning and 62.3MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-19 21:15:04,468 INFO L158 Benchmark]: Boogie Preprocessor took 59.52ms. Allocated memory is still 104.9MB. Free memory was 62.3MB in the beginning and 60.8MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-19 21:15:04,468 INFO L158 Benchmark]: RCFGBuilder took 432.66ms. Allocated memory was 104.9MB in the beginning and 127.9MB in the end (delta: 23.1MB). Free memory was 60.5MB in the beginning and 97.3MB in the end (delta: -36.8MB). Peak memory consumption was 9.6MB. Max. memory is 16.1GB. [2022-07-19 21:15:04,468 INFO L158 Benchmark]: TraceAbstraction took 981.53ms. Allocated memory is still 127.9MB. Free memory was 96.6MB in the beginning and 65.4MB in the end (delta: 31.1MB). Peak memory consumption was 29.9MB. Max. memory is 16.1GB. [2022-07-19 21:15:04,469 INFO L158 Benchmark]: Witness Printer took 46.47ms. Allocated memory is still 127.9MB. Free memory was 65.4MB in the beginning and 58.0MB in the end (delta: 7.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-19 21:15:04,470 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 79.7MB. Free memory is still 43.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 456.69ms. Allocated memory is still 104.9MB. Free memory was 72.3MB in the beginning and 64.7MB in the end (delta: 7.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 58.00ms. Allocated memory is still 104.9MB. Free memory was 64.7MB in the beginning and 62.3MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 59.52ms. Allocated memory is still 104.9MB. Free memory was 62.3MB in the beginning and 60.8MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 432.66ms. Allocated memory was 104.9MB in the beginning and 127.9MB in the end (delta: 23.1MB). Free memory was 60.5MB in the beginning and 97.3MB in the end (delta: -36.8MB). Peak memory consumption was 9.6MB. Max. memory is 16.1GB. * TraceAbstraction took 981.53ms. Allocated memory is still 127.9MB. Free memory was 96.6MB in the beginning and 65.4MB in the end (delta: 31.1MB). Peak memory consumption was 29.9MB. Max. memory is 16.1GB. * Witness Printer took 46.47ms. Allocated memory is still 127.9MB. Free memory was 65.4MB in the beginning and 58.0MB in the end (delta: 7.4MB). 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: 0.8s, 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! [2022-07-19 21:15:04,506 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