/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread-divine/ring_1w1r-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-?-0612a5f-m [2022-09-20 20:44:11,199 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-09-20 20:44:11,201 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-09-20 20:44:11,232 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-09-20 20:44:11,232 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-09-20 20:44:11,235 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-09-20 20:44:11,237 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-09-20 20:44:11,240 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-09-20 20:44:11,241 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-09-20 20:44:11,247 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-09-20 20:44:11,248 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-09-20 20:44:11,249 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-09-20 20:44:11,249 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-09-20 20:44:11,249 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-09-20 20:44:11,250 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-09-20 20:44:11,250 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-09-20 20:44:11,251 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-09-20 20:44:11,251 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-09-20 20:44:11,252 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-09-20 20:44:11,253 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-09-20 20:44:11,254 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-09-20 20:44:11,254 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-09-20 20:44:11,256 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-09-20 20:44:11,256 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-09-20 20:44:11,261 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-09-20 20:44:11,261 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-09-20 20:44:11,261 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-09-20 20:44:11,262 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-09-20 20:44:11,262 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-09-20 20:44:11,263 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-09-20 20:44:11,263 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-09-20 20:44:11,263 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-09-20 20:44:11,265 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-09-20 20:44:11,265 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-09-20 20:44:11,266 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-09-20 20:44:11,266 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-09-20 20:44:11,266 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-09-20 20:44:11,266 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-09-20 20:44:11,266 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-09-20 20:44:11,267 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-09-20 20:44:11,267 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-09-20 20:44:11,268 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf [2022-09-20 20:44:11,289 INFO L113 SettingsManager]: Loading preferences was successful [2022-09-20 20:44:11,289 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-09-20 20:44:11,290 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-09-20 20:44:11,290 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-09-20 20:44:11,291 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-09-20 20:44:11,291 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-09-20 20:44:11,291 INFO L138 SettingsManager]: * Use SBE=true [2022-09-20 20:44:11,291 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-09-20 20:44:11,291 INFO L138 SettingsManager]: * sizeof long=4 [2022-09-20 20:44:11,291 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-09-20 20:44:11,292 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-09-20 20:44:11,292 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-09-20 20:44:11,292 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-09-20 20:44:11,292 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-09-20 20:44:11,292 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-09-20 20:44:11,292 INFO L138 SettingsManager]: * sizeof long double=12 [2022-09-20 20:44:11,292 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-09-20 20:44:11,292 INFO L138 SettingsManager]: * Use constant arrays=true [2022-09-20 20:44:11,292 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-09-20 20:44:11,292 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-09-20 20:44:11,293 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-09-20 20:44:11,293 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-09-20 20:44:11,293 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-09-20 20:44:11,293 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-09-20 20:44:11,293 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-09-20 20:44:11,293 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-09-20 20:44:11,293 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-09-20 20:44:11,293 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-09-20 20:44:11,293 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-09-20 20:44:11,293 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-09-20 20:44:11,294 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-09-20 20:44:11,294 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-09-20 20:44:11,478 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-09-20 20:44:11,496 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-09-20 20:44:11,499 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-09-20 20:44:11,500 INFO L271 PluginConnector]: Initializing CDTParser... [2022-09-20 20:44:11,500 INFO L275 PluginConnector]: CDTParser initialized [2022-09-20 20:44:11,501 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-divine/ring_1w1r-1.i [2022-09-20 20:44:11,549 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c28bf33c0/f67bf6b2e91b42f4bbd1fe5e63c4a136/FLAG0bd50cecc [2022-09-20 20:44:11,965 INFO L306 CDTParser]: Found 1 translation units. [2022-09-20 20:44:11,966 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-divine/ring_1w1r-1.i [2022-09-20 20:44:11,978 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c28bf33c0/f67bf6b2e91b42f4bbd1fe5e63c4a136/FLAG0bd50cecc [2022-09-20 20:44:11,990 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c28bf33c0/f67bf6b2e91b42f4bbd1fe5e63c4a136 [2022-09-20 20:44:11,992 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-09-20 20:44:11,994 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-09-20 20:44:11,995 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-09-20 20:44:11,995 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-09-20 20:44:11,997 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-09-20 20:44:11,998 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 08:44:11" (1/1) ... [2022-09-20 20:44:11,999 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@cc703d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 08:44:11, skipping insertion in model container [2022-09-20 20:44:11,999 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 08:44:11" (1/1) ... [2022-09-20 20:44:12,003 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-09-20 20:44:12,046 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-09-20 20:44:12,158 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-09-20 20:44:12,285 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-divine/ring_1w1r-1.i[39095,39108] [2022-09-20 20:44:12,289 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-divine/ring_1w1r-1.i[39180,39193] [2022-09-20 20:44:12,290 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-divine/ring_1w1r-1.i[39232,39245] [2022-09-20 20:44:12,296 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-divine/ring_1w1r-1.i[39641,39654] [2022-09-20 20:44:12,297 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-divine/ring_1w1r-1.i[39726,39739] [2022-09-20 20:44:12,297 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-divine/ring_1w1r-1.i[39778,39791] [2022-09-20 20:44:12,300 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-09-20 20:44:12,306 INFO L203 MainTranslator]: Completed pre-run [2022-09-20 20:44:12,314 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-09-20 20:44:12,334 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-divine/ring_1w1r-1.i[39095,39108] [2022-09-20 20:44:12,335 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-divine/ring_1w1r-1.i[39180,39193] [2022-09-20 20:44:12,335 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-divine/ring_1w1r-1.i[39232,39245] [2022-09-20 20:44:12,337 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-divine/ring_1w1r-1.i[39641,39654] [2022-09-20 20:44:12,338 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-divine/ring_1w1r-1.i[39726,39739] [2022-09-20 20:44:12,338 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-divine/ring_1w1r-1.i[39778,39791] [2022-09-20 20:44:12,340 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-09-20 20:44:12,371 INFO L208 MainTranslator]: Completed translation [2022-09-20 20:44:12,371 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 08:44:12 WrapperNode [2022-09-20 20:44:12,372 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-09-20 20:44:12,372 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-09-20 20:44:12,372 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-09-20 20:44:12,372 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-09-20 20:44:12,377 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 08:44:12" (1/1) ... [2022-09-20 20:44:12,388 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 08:44:12" (1/1) ... [2022-09-20 20:44:12,415 INFO L138 Inliner]: procedures = 225, calls = 43, calls flagged for inlining = 10, calls inlined = 7, statements flattened = 113 [2022-09-20 20:44:12,415 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-09-20 20:44:12,415 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-09-20 20:44:12,416 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-09-20 20:44:12,416 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-09-20 20:44:12,421 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 08:44:12" (1/1) ... [2022-09-20 20:44:12,421 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 08:44:12" (1/1) ... [2022-09-20 20:44:12,424 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 08:44:12" (1/1) ... [2022-09-20 20:44:12,424 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 08:44:12" (1/1) ... [2022-09-20 20:44:12,428 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 08:44:12" (1/1) ... [2022-09-20 20:44:12,431 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 08:44:12" (1/1) ... [2022-09-20 20:44:12,432 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 08:44:12" (1/1) ... [2022-09-20 20:44:12,433 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-09-20 20:44:12,434 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-09-20 20:44:12,434 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-09-20 20:44:12,434 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-09-20 20:44:12,435 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 08:44:12" (1/1) ... [2022-09-20 20:44:12,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-09-20 20:44:12,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-20 20:44:12,461 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) [2022-09-20 20:44:12,487 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-09-20 20:44:12,487 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-09-20 20:44:12,487 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-09-20 20:44:12,488 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-09-20 20:44:12,488 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-09-20 20:44:12,488 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-09-20 20:44:12,488 INFO L130 BoogieDeclarations]: Found specification of procedure reader_nowait_fn [2022-09-20 20:44:12,488 INFO L138 BoogieDeclarations]: Found implementation of procedure reader_nowait_fn [2022-09-20 20:44:12,488 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-09-20 20:44:12,488 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-09-20 20:44:12,489 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-09-20 20:44:12,477 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 [2022-09-20 20:44:12,581 INFO L234 CfgBuilder]: Building ICFG [2022-09-20 20:44:12,582 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-09-20 20:44:12,758 INFO L275 CfgBuilder]: Performing block encoding [2022-09-20 20:44:12,764 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-09-20 20:44:12,764 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-09-20 20:44:12,766 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 08:44:12 BoogieIcfgContainer [2022-09-20 20:44:12,766 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-09-20 20:44:12,767 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-09-20 20:44:12,767 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-09-20 20:44:12,770 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-09-20 20:44:12,770 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 08:44:11" (1/3) ... [2022-09-20 20:44:12,770 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@621efb22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 08:44:12, skipping insertion in model container [2022-09-20 20:44:12,770 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 08:44:12" (2/3) ... [2022-09-20 20:44:12,771 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@621efb22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 08:44:12, skipping insertion in model container [2022-09-20 20:44:12,771 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 08:44:12" (3/3) ... [2022-09-20 20:44:12,772 INFO L112 eAbstractionObserver]: Analyzing ICFG ring_1w1r-1.i [2022-09-20 20:44:12,785 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-09-20 20:44:12,785 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2022-09-20 20:44:12,785 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-09-20 20:44:12,848 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-09-20 20:44:12,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 136 places, 141 transitions, 290 flow [2022-09-20 20:44:12,951 INFO L130 PetriNetUnfolder]: 9/140 cut-off events. [2022-09-20 20:44:12,951 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-09-20 20:44:12,956 INFO L83 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 247 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. [2022-09-20 20:44:12,956 INFO L82 GeneralOperation]: Start removeDead. Operand has 136 places, 141 transitions, 290 flow [2022-09-20 20:44:12,960 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 126 places, 131 transitions, 265 flow [2022-09-20 20:44:12,967 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-09-20 20:44:12,971 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=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@586fcde2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-09-20 20:44:12,971 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-09-20 20:44:12,977 INFO L130 PetriNetUnfolder]: 2/52 cut-off events. [2022-09-20 20:44:12,978 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-09-20 20:44:12,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 20:44:12,978 INFO L208 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] [2022-09-20 20:44:12,979 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)] === [2022-09-20 20:44:12,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 20:44:12,983 INFO L85 PathProgramCache]: Analyzing trace with hash 1380320653, now seen corresponding path program 1 times [2022-09-20 20:44:12,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 20:44:12,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507908773] [2022-09-20 20:44:12,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 20:44:12,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 20:44:13,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 20:44:13,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 20:44:13,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 20:44:13,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507908773] [2022-09-20 20:44:13,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507908773] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 20:44:13,114 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 20:44:13,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-09-20 20:44:13,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202525598] [2022-09-20 20:44:13,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 20:44:13,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-09-20 20:44:13,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 20:44:13,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-09-20 20:44:13,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-09-20 20:44:13,148 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 141 [2022-09-20 20:44:13,152 INFO L100 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) [2022-09-20 20:44:13,152 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 20:44:13,152 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 141 [2022-09-20 20:44:13,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 20:44:13,195 INFO L130 PetriNetUnfolder]: 3/125 cut-off events. [2022-09-20 20:44:13,195 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-09-20 20:44:13,196 INFO L83 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 208 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. [2022-09-20 20:44:13,197 INFO L137 encePairwiseOnDemand]: 135/141 looper letters, 1 selfloop transitions, 0 changer transitions 0/125 dead transitions. [2022-09-20 20:44:13,197 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 125 transitions, 255 flow [2022-09-20 20:44:13,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-09-20 20:44:13,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-09-20 20:44:13,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 273 transitions. [2022-09-20 20:44:13,206 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9680851063829787 [2022-09-20 20:44:13,206 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 273 transitions. [2022-09-20 20:44:13,206 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 273 transitions. [2022-09-20 20:44:13,207 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 20:44:13,209 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 273 transitions. [2022-09-20 20:44:13,211 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) [2022-09-20 20:44:13,214 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) [2022-09-20 20:44:13,214 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) [2022-09-20 20:44:13,216 INFO L175 Difference]: Start difference. First operand has 126 places, 131 transitions, 265 flow. Second operand 2 states and 273 transitions. [2022-09-20 20:44:13,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 125 transitions, 255 flow [2022-09-20 20:44:13,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 125 transitions, 254 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-09-20 20:44:13,223 INFO L231 Difference]: Finished difference. Result has 126 places, 125 transitions, 252 flow [2022-09-20 20:44:13,224 INFO L270 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} [2022-09-20 20:44:13,228 INFO L287 CegarLoopForPetriNet]: 126 programPoint places, 0 predicate places. [2022-09-20 20:44:13,228 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 125 transitions, 252 flow [2022-09-20 20:44:13,229 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) [2022-09-20 20:44:13,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 20:44:13,229 INFO L208 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] [2022-09-20 20:44:13,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-09-20 20:44:13,229 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)] === [2022-09-20 20:44:13,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 20:44:13,231 INFO L85 PathProgramCache]: Analyzing trace with hash 1380321614, now seen corresponding path program 1 times [2022-09-20 20:44:13,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 20:44:13,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813138541] [2022-09-20 20:44:13,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 20:44:13,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 20:44:13,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-20 20:44:13,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-20 20:44:13,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-20 20:44:13,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813138541] [2022-09-20 20:44:13,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813138541] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-20 20:44:13,292 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-20 20:44:13,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-09-20 20:44:13,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399365010] [2022-09-20 20:44:13,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-20 20:44:13,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-09-20 20:44:13,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-20 20:44:13,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-09-20 20:44:13,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-09-20 20:44:13,302 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 141 [2022-09-20 20:44:13,303 INFO L100 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) [2022-09-20 20:44:13,303 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-09-20 20:44:13,303 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 141 [2022-09-20 20:44:13,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-09-20 20:44:13,334 INFO L130 PetriNetUnfolder]: 3/151 cut-off events. [2022-09-20 20:44:13,334 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-09-20 20:44:13,335 INFO L83 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 153 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. [2022-09-20 20:44:13,336 INFO L137 encePairwiseOnDemand]: 138/141 looper letters, 7 selfloop transitions, 2 changer transitions 0/128 dead transitions. [2022-09-20 20:44:13,336 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 128 transitions, 276 flow [2022-09-20 20:44:13,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-09-20 20:44:13,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-09-20 20:44:13,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 394 transitions. [2022-09-20 20:44:13,338 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.9314420803782506 [2022-09-20 20:44:13,338 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 394 transitions. [2022-09-20 20:44:13,338 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 394 transitions. [2022-09-20 20:44:13,338 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-09-20 20:44:13,338 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 394 transitions. [2022-09-20 20:44:13,339 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) [2022-09-20 20:44:13,340 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) [2022-09-20 20:44:13,341 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) [2022-09-20 20:44:13,341 INFO L175 Difference]: Start difference. First operand has 126 places, 125 transitions, 252 flow. Second operand 3 states and 394 transitions. [2022-09-20 20:44:13,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 128 transitions, 276 flow [2022-09-20 20:44:13,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 128 transitions, 276 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-09-20 20:44:13,343 INFO L231 Difference]: Finished difference. Result has 129 places, 126 transitions, 264 flow [2022-09-20 20:44:13,343 INFO L270 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} [2022-09-20 20:44:13,344 INFO L287 CegarLoopForPetriNet]: 126 programPoint places, 3 predicate places. [2022-09-20 20:44:13,344 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 126 transitions, 264 flow [2022-09-20 20:44:13,344 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) [2022-09-20 20:44:13,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-09-20 20:44:13,344 INFO L208 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] [2022-09-20 20:44:13,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-09-20 20:44:13,345 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)] === [2022-09-20 20:44:13,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-20 20:44:13,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1966319385, now seen corresponding path program 1 times [2022-09-20 20:44:13,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-20 20:44:13,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893754273] [2022-09-20 20:44:13,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-20 20:44:13,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-20 20:44:13,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-09-20 20:44:13,389 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-09-20 20:44:13,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-09-20 20:44:13,445 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-09-20 20:44:13,445 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-09-20 20:44:13,446 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location reader_nowait_fnErr0ASSERT_VIOLATIONERROR_FUNCTION (6 of 7 remaining) [2022-09-20 20:44:13,447 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location reader_nowait_fnErr1ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2022-09-20 20:44:13,448 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location reader_nowait_fnErr2ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2022-09-20 20:44:13,448 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location reader_nowait_fnErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2022-09-20 20:44:13,448 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 7 remaining) [2022-09-20 20:44:13,448 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location reader_nowait_fnErr1ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2022-09-20 20:44:13,448 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location reader_nowait_fnErr2ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2022-09-20 20:44:13,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-09-20 20:44:13,448 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-09-20 20:44:13,452 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-09-20 20:44:13,452 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-09-20 20:44:13,482 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.09 08:44:13 BasicIcfg [2022-09-20 20:44:13,487 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-09-20 20:44:13,489 INFO L158 Benchmark]: Toolchain (without parser) took 1493.42ms. Allocated memory was 200.3MB in the beginning and 241.2MB in the end (delta: 40.9MB). Free memory was 168.9MB in the beginning and 169.1MB in the end (delta: -247.3kB). Peak memory consumption was 41.8MB. Max. memory is 8.0GB. [2022-09-20 20:44:13,489 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 200.3MB. Free memory is still 154.9MB. There was no memory consumed. Max. memory is 8.0GB. [2022-09-20 20:44:13,491 INFO L158 Benchmark]: CACSL2BoogieTranslator took 376.37ms. Allocated memory was 200.3MB in the beginning and 241.2MB in the end (delta: 40.9MB). Free memory was 168.6MB in the beginning and 194.0MB in the end (delta: -25.4MB). Peak memory consumption was 19.2MB. Max. memory is 8.0GB. [2022-09-20 20:44:13,491 INFO L158 Benchmark]: Boogie Procedure Inliner took 42.81ms. Allocated memory is still 241.2MB. Free memory was 194.0MB in the beginning and 191.5MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-09-20 20:44:13,492 INFO L158 Benchmark]: Boogie Preprocessor took 18.06ms. Allocated memory is still 241.2MB. Free memory was 191.5MB in the beginning and 189.8MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-09-20 20:44:13,492 INFO L158 Benchmark]: RCFGBuilder took 331.69ms. Allocated memory is still 241.2MB. Free memory was 189.8MB in the beginning and 175.1MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 8.0GB. [2022-09-20 20:44:13,492 INFO L158 Benchmark]: TraceAbstraction took 719.78ms. Allocated memory is still 241.2MB. Free memory was 174.4MB in the beginning and 169.1MB in the end (delta: 5.3MB). Peak memory consumption was 6.9MB. Max. memory is 8.0GB. [2022-09-20 20:44:13,494 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 200.3MB. Free memory is still 154.9MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 376.37ms. Allocated memory was 200.3MB in the beginning and 241.2MB in the end (delta: 40.9MB). Free memory was 168.6MB in the beginning and 194.0MB in the end (delta: -25.4MB). Peak memory consumption was 19.2MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 42.81ms. Allocated memory is still 241.2MB. Free memory was 194.0MB in the beginning and 191.5MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 18.06ms. Allocated memory is still 241.2MB. Free memory was 191.5MB in the beginning and 189.8MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 331.69ms. Allocated memory is still 241.2MB. Free memory was 189.8MB in the beginning and 175.1MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 8.0GB. * TraceAbstraction took 719.78ms. Allocated memory is still 241.2MB. Free memory was 174.4MB in the beginning and 169.1MB in the end (delta: 5.3MB). Peak memory consumption was 6.9MB. Max. memory is 8.0GB. * 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: 0.6s, OverallIterations: 3, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, 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! [2022-09-20 20:44:13,521 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...