./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-atomic/read_write_lock-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6c24879c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/pthread-atomic/read_write_lock-2.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 3e2f466b16db44ce2fec1aabf9e70b4ab734ef2801c32e66d10c5bcbcceb5301 --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 10:00:32,457 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 10:00:32,459 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 10:00:32,489 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 10:00:32,492 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 10:00:32,493 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 10:00:32,497 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 10:00:32,500 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 10:00:32,502 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 10:00:32,507 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 10:00:32,508 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 10:00:32,510 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 10:00:32,511 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 10:00:32,512 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 10:00:32,515 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 10:00:32,517 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 10:00:32,517 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 10:00:32,519 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 10:00:32,523 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 10:00:32,527 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 10:00:32,529 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 10:00:32,530 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 10:00:32,531 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 10:00:32,531 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 10:00:32,533 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 10:00:32,537 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 10:00:32,537 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 10:00:32,538 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 10:00:32,539 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 10:00:32,539 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 10:00:32,540 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 10:00:32,540 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 10:00:32,542 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 10:00:32,542 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 10:00:32,543 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 10:00:32,543 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 10:00:32,544 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 10:00:32,544 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 10:00:32,544 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 10:00:32,544 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 10:00:32,545 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 10:00:32,547 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 10:00:32,548 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-12 10:00:32,581 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 10:00:32,582 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 10:00:32,582 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 10:00:32,582 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 10:00:32,583 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 10:00:32,583 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 10:00:32,584 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 10:00:32,584 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 10:00:32,584 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 10:00:32,585 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 10:00:32,585 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 10:00:32,585 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 10:00:32,586 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 10:00:32,586 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 10:00:32,586 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-12 10:00:32,586 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 10:00:32,586 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-12 10:00:32,586 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 10:00:32,587 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-12 10:00:32,588 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 10:00:32,588 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-12 10:00:32,588 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 10:00:32,589 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 10:00:32,589 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 10:00:32,589 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 10:00:32,589 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 10:00:32,589 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 10:00:32,590 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-12 10:00:32,590 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 10:00:32,590 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 10:00:32,590 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-12 10:00:32,590 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-12 10:00:32,591 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-12 10:00:32,591 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3e2f466b16db44ce2fec1aabf9e70b4ab734ef2801c32e66d10c5bcbcceb5301 [2022-07-12 10:00:32,882 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 10:00:32,908 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 10:00:32,910 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 10:00:32,911 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 10:00:32,912 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 10:00:32,913 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-atomic/read_write_lock-2.i [2022-07-12 10:00:32,972 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/980190ff2/49c7646b2f404656a3586953e76fde0a/FLAG8f2e85617 [2022-07-12 10:00:33,461 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 10:00:33,462 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-atomic/read_write_lock-2.i [2022-07-12 10:00:33,484 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/980190ff2/49c7646b2f404656a3586953e76fde0a/FLAG8f2e85617 [2022-07-12 10:00:33,942 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/980190ff2/49c7646b2f404656a3586953e76fde0a [2022-07-12 10:00:33,944 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 10:00:33,946 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 10:00:33,947 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 10:00:33,947 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 10:00:33,953 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 10:00:33,954 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 10:00:33" (1/1) ... [2022-07-12 10:00:33,956 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72c66536 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:00:33, skipping insertion in model container [2022-07-12 10:00:33,957 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 10:00:33" (1/1) ... [2022-07-12 10:00:33,964 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 10:00:33,995 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 10:00:34,118 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-07-12 10:00:34,212 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-atomic/read_write_lock-2.i[31244,31257] [2022-07-12 10:00:34,221 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 10:00:34,227 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 10:00:34,251 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-07-12 10:00:34,268 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-atomic/read_write_lock-2.i[31244,31257] [2022-07-12 10:00:34,273 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 10:00:34,331 INFO L208 MainTranslator]: Completed translation [2022-07-12 10:00:34,331 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:00:34 WrapperNode [2022-07-12 10:00:34,332 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 10:00:34,333 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 10:00:34,333 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 10:00:34,333 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 10:00:34,339 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:00:34" (1/1) ... [2022-07-12 10:00:34,357 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:00:34" (1/1) ... [2022-07-12 10:00:34,379 INFO L137 Inliner]: procedures = 174, calls = 51, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 119 [2022-07-12 10:00:34,381 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 10:00:34,381 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 10:00:34,382 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 10:00:34,382 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 10:00:34,390 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:00:34" (1/1) ... [2022-07-12 10:00:34,390 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:00:34" (1/1) ... [2022-07-12 10:00:34,393 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:00:34" (1/1) ... [2022-07-12 10:00:34,393 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:00:34" (1/1) ... [2022-07-12 10:00:34,397 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:00:34" (1/1) ... [2022-07-12 10:00:34,399 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:00:34" (1/1) ... [2022-07-12 10:00:34,400 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:00:34" (1/1) ... [2022-07-12 10:00:34,402 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 10:00:34,418 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 10:00:34,418 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 10:00:34,418 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 10:00:34,419 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:00:34" (1/1) ... [2022-07-12 10:00:34,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 10:00:34,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 10:00:34,447 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-12 10:00:34,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-12 10:00:34,486 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-12 10:00:34,486 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-12 10:00:34,486 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-12 10:00:34,486 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 10:00:34,488 INFO L130 BoogieDeclarations]: Found specification of procedure reader [2022-07-12 10:00:34,488 INFO L138 BoogieDeclarations]: Found implementation of procedure reader [2022-07-12 10:00:34,488 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-12 10:00:34,488 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-12 10:00:34,488 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-12 10:00:34,489 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-12 10:00:34,489 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 10:00:34,489 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 10:00:34,489 INFO L130 BoogieDeclarations]: Found specification of procedure writer [2022-07-12 10:00:34,489 INFO L138 BoogieDeclarations]: Found implementation of procedure writer [2022-07-12 10:00:34,491 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-12 10:00:34,660 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 10:00:34,661 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 10:00:34,871 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 10:00:34,897 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 10:00:34,897 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-07-12 10:00:34,899 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 10:00:34 BoogieIcfgContainer [2022-07-12 10:00:34,900 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 10:00:34,901 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 10:00:34,901 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 10:00:34,904 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 10:00:34,904 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 10:00:33" (1/3) ... [2022-07-12 10:00:34,905 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a6f814a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 10:00:34, skipping insertion in model container [2022-07-12 10:00:34,905 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 10:00:34" (2/3) ... [2022-07-12 10:00:34,906 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a6f814a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 10:00:34, skipping insertion in model container [2022-07-12 10:00:34,906 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 10:00:34" (3/3) ... [2022-07-12 10:00:34,907 INFO L111 eAbstractionObserver]: Analyzing ICFG read_write_lock-2.i [2022-07-12 10:00:34,911 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-12 10:00:34,919 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 10:00:34,919 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-12 10:00:34,919 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-12 10:00:34,999 INFO L135 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-07-12 10:00:35,046 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 125 places, 114 transitions, 260 flow [2022-07-12 10:00:35,103 INFO L129 PetriNetUnfolder]: 2/110 cut-off events. [2022-07-12 10:00:35,103 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-12 10:00:35,109 INFO L84 FinitePrefix]: Finished finitePrefix Result has 127 conditions, 110 events. 2/110 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 100 event pairs, 0 based on Foata normal form. 0/106 useless extension candidates. Maximal degree in co-relation 74. Up to 2 conditions per place. [2022-07-12 10:00:35,110 INFO L82 GeneralOperation]: Start removeDead. Operand has 125 places, 114 transitions, 260 flow [2022-07-12 10:00:35,115 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 107 places, 96 transitions, 213 flow [2022-07-12 10:00:35,129 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 10:00:35,136 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@3ef94f89, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@489e9913 [2022-07-12 10:00:35,137 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-07-12 10:00:35,155 INFO L129 PetriNetUnfolder]: 1/58 cut-off events. [2022-07-12 10:00:35,155 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-12 10:00:35,155 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:00:35,156 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] [2022-07-12 10:00:35,157 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-12 10:00:35,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:00:35,161 INFO L85 PathProgramCache]: Analyzing trace with hash 2006515335, now seen corresponding path program 1 times [2022-07-12 10:00:35,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:00:35,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477070595] [2022-07-12 10:00:35,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:00:35,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:00:35,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:00:35,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:00:35,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:00:35,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477070595] [2022-07-12 10:00:35,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477070595] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:00:35,462 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:00:35,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 10:00:35,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011406289] [2022-07-12 10:00:35,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:00:35,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 10:00:35,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:00:35,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 10:00:35,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-12 10:00:35,504 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 114 [2022-07-12 10:00:35,512 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 96 transitions, 213 flow. Second operand has 6 states, 6 states have (on average 84.83333333333333) internal successors, (509), 6 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:00:35,512 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:00:35,512 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 114 [2022-07-12 10:00:35,513 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:00:36,725 INFO L129 PetriNetUnfolder]: 3525/7769 cut-off events. [2022-07-12 10:00:36,725 INFO L130 PetriNetUnfolder]: For 1654/1654 co-relation queries the response was YES. [2022-07-12 10:00:36,747 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13923 conditions, 7769 events. 3525/7769 cut-off events. For 1654/1654 co-relation queries the response was YES. Maximal size of possible extension queue 563. Compared 71761 event pairs, 961 based on Foata normal form. 422/7837 useless extension candidates. Maximal degree in co-relation 13398. Up to 1729 conditions per place. [2022-07-12 10:00:36,818 INFO L132 encePairwiseOnDemand]: 102/114 looper letters, 116 selfloop transitions, 32 changer transitions 0/214 dead transitions. [2022-07-12 10:00:36,818 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 214 transitions, 823 flow [2022-07-12 10:00:36,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-12 10:00:36,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-07-12 10:00:36,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1160 transitions. [2022-07-12 10:00:36,833 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.847953216374269 [2022-07-12 10:00:36,834 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1160 transitions. [2022-07-12 10:00:36,834 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1160 transitions. [2022-07-12 10:00:36,837 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:00:36,839 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1160 transitions. [2022-07-12 10:00:36,844 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 96.66666666666667) internal successors, (1160), 12 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:00:36,851 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 114.0) internal successors, (1482), 13 states have internal predecessors, (1482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:00:36,852 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 114.0) internal successors, (1482), 13 states have internal predecessors, (1482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:00:36,854 INFO L186 Difference]: Start difference. First operand has 107 places, 96 transitions, 213 flow. Second operand 12 states and 1160 transitions. [2022-07-12 10:00:36,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 214 transitions, 823 flow [2022-07-12 10:00:36,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 214 transitions, 764 flow, removed 0 selfloop flow, removed 7 redundant places. [2022-07-12 10:00:36,875 INFO L242 Difference]: Finished difference. Result has 119 places, 129 transitions, 416 flow [2022-07-12 10:00:36,877 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=114, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=416, PETRI_PLACES=119, PETRI_TRANSITIONS=129} [2022-07-12 10:00:36,880 INFO L279 CegarLoopForPetriNet]: 107 programPoint places, 12 predicate places. [2022-07-12 10:00:36,880 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 129 transitions, 416 flow [2022-07-12 10:00:36,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 84.83333333333333) internal successors, (509), 6 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:00:36,881 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:00:36,881 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] [2022-07-12 10:00:36,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 10:00:36,881 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-12 10:00:36,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:00:36,882 INFO L85 PathProgramCache]: Analyzing trace with hash 1738116757, now seen corresponding path program 1 times [2022-07-12 10:00:36,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:00:36,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649341746] [2022-07-12 10:00:36,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:00:36,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:00:36,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:00:36,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:00:36,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:00:36,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649341746] [2022-07-12 10:00:36,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649341746] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:00:36,937 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:00:36,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 10:00:36,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742068358] [2022-07-12 10:00:36,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:00:36,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 10:00:36,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:00:36,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 10:00:36,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 10:00:36,940 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 114 [2022-07-12 10:00:36,941 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 129 transitions, 416 flow. Second operand has 3 states, 3 states have (on average 98.66666666666667) internal successors, (296), 3 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:00:36,941 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:00:36,941 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 114 [2022-07-12 10:00:36,941 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:00:37,218 INFO L129 PetriNetUnfolder]: 398/2267 cut-off events. [2022-07-12 10:00:37,219 INFO L130 PetriNetUnfolder]: For 379/391 co-relation queries the response was YES. [2022-07-12 10:00:37,233 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3864 conditions, 2267 events. 398/2267 cut-off events. For 379/391 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 22152 event pairs, 93 based on Foata normal form. 51/2197 useless extension candidates. Maximal degree in co-relation 3549. Up to 251 conditions per place. [2022-07-12 10:00:37,244 INFO L132 encePairwiseOnDemand]: 108/114 looper letters, 15 selfloop transitions, 4 changer transitions 0/134 dead transitions. [2022-07-12 10:00:37,244 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 134 transitions, 470 flow [2022-07-12 10:00:37,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 10:00:37,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-12 10:00:37,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 314 transitions. [2022-07-12 10:00:37,246 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9181286549707602 [2022-07-12 10:00:37,247 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 314 transitions. [2022-07-12 10:00:37,247 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 314 transitions. [2022-07-12 10:00:37,247 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:00:37,247 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 314 transitions. [2022-07-12 10:00:37,248 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 104.66666666666667) internal successors, (314), 3 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:00:37,249 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 114.0) internal successors, (456), 4 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:00:37,250 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 114.0) internal successors, (456), 4 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:00:37,250 INFO L186 Difference]: Start difference. First operand has 119 places, 129 transitions, 416 flow. Second operand 3 states and 314 transitions. [2022-07-12 10:00:37,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 134 transitions, 470 flow [2022-07-12 10:00:37,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 134 transitions, 470 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:00:37,265 INFO L242 Difference]: Finished difference. Result has 122 places, 129 transitions, 432 flow [2022-07-12 10:00:37,272 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=114, PETRI_DIFFERENCE_MINUEND_FLOW=416, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=432, PETRI_PLACES=122, PETRI_TRANSITIONS=129} [2022-07-12 10:00:37,273 INFO L279 CegarLoopForPetriNet]: 107 programPoint places, 15 predicate places. [2022-07-12 10:00:37,273 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 129 transitions, 432 flow [2022-07-12 10:00:37,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 98.66666666666667) internal successors, (296), 3 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:00:37,274 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:00:37,274 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] [2022-07-12 10:00:37,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-12 10:00:37,275 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-12 10:00:37,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:00:37,275 INFO L85 PathProgramCache]: Analyzing trace with hash 195211785, now seen corresponding path program 2 times [2022-07-12 10:00:37,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:00:37,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415692054] [2022-07-12 10:00:37,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:00:37,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:00:37,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:00:37,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:00:37,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:00:37,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415692054] [2022-07-12 10:00:37,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415692054] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:00:37,395 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:00:37,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 10:00:37,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362068951] [2022-07-12 10:00:37,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:00:37,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 10:00:37,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:00:37,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 10:00:37,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 10:00:37,400 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 114 [2022-07-12 10:00:37,401 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 129 transitions, 432 flow. Second operand has 4 states, 4 states have (on average 93.5) internal successors, (374), 4 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:00:37,401 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:00:37,401 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 114 [2022-07-12 10:00:37,401 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:00:37,969 INFO L129 PetriNetUnfolder]: 1590/4818 cut-off events. [2022-07-12 10:00:37,969 INFO L130 PetriNetUnfolder]: For 2362/2464 co-relation queries the response was YES. [2022-07-12 10:00:37,994 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10147 conditions, 4818 events. 1590/4818 cut-off events. For 2362/2464 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 48917 event pairs, 145 based on Foata normal form. 50/4728 useless extension candidates. Maximal degree in co-relation 8937. Up to 767 conditions per place. [2022-07-12 10:00:38,013 INFO L132 encePairwiseOnDemand]: 105/114 looper letters, 45 selfloop transitions, 19 changer transitions 4/175 dead transitions. [2022-07-12 10:00:38,014 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 175 transitions, 737 flow [2022-07-12 10:00:38,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 10:00:38,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-12 10:00:38,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 518 transitions. [2022-07-12 10:00:38,016 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9087719298245615 [2022-07-12 10:00:38,016 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 518 transitions. [2022-07-12 10:00:38,017 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 518 transitions. [2022-07-12 10:00:38,017 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:00:38,017 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 518 transitions. [2022-07-12 10:00:38,019 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 103.6) internal successors, (518), 5 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:00:38,020 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 114.0) internal successors, (684), 6 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:00:38,020 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 114.0) internal successors, (684), 6 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:00:38,020 INFO L186 Difference]: Start difference. First operand has 122 places, 129 transitions, 432 flow. Second operand 5 states and 518 transitions. [2022-07-12 10:00:38,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 175 transitions, 737 flow [2022-07-12 10:00:38,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 175 transitions, 717 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-12 10:00:38,062 INFO L242 Difference]: Finished difference. Result has 124 places, 143 transitions, 510 flow [2022-07-12 10:00:38,062 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=114, PETRI_DIFFERENCE_MINUEND_FLOW=424, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=510, PETRI_PLACES=124, PETRI_TRANSITIONS=143} [2022-07-12 10:00:38,063 INFO L279 CegarLoopForPetriNet]: 107 programPoint places, 17 predicate places. [2022-07-12 10:00:38,063 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 143 transitions, 510 flow [2022-07-12 10:00:38,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 93.5) internal successors, (374), 4 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:00:38,064 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:00:38,064 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] [2022-07-12 10:00:38,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-12 10:00:38,064 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-12 10:00:38,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:00:38,065 INFO L85 PathProgramCache]: Analyzing trace with hash 579299824, now seen corresponding path program 1 times [2022-07-12 10:00:38,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:00:38,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751937357] [2022-07-12 10:00:38,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:00:38,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:00:38,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:00:38,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:00:38,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:00:38,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751937357] [2022-07-12 10:00:38,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751937357] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:00:38,124 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:00:38,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 10:00:38,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143206398] [2022-07-12 10:00:38,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:00:38,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 10:00:38,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:00:38,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 10:00:38,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-12 10:00:38,127 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 114 [2022-07-12 10:00:38,127 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 143 transitions, 510 flow. Second operand has 6 states, 6 states have (on average 85.16666666666667) internal successors, (511), 6 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:00:38,128 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:00:38,128 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 114 [2022-07-12 10:00:38,128 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:00:40,277 INFO L129 PetriNetUnfolder]: 8131/17870 cut-off events. [2022-07-12 10:00:40,277 INFO L130 PetriNetUnfolder]: For 15561/15640 co-relation queries the response was YES. [2022-07-12 10:00:40,344 INFO L84 FinitePrefix]: Finished finitePrefix Result has 44383 conditions, 17870 events. 8131/17870 cut-off events. For 15561/15640 co-relation queries the response was YES. Maximal size of possible extension queue 1622. Compared 195577 event pairs, 1270 based on Foata normal form. 20/17361 useless extension candidates. Maximal degree in co-relation 43808. Up to 3340 conditions per place. [2022-07-12 10:00:40,423 INFO L132 encePairwiseOnDemand]: 104/114 looper letters, 207 selfloop transitions, 134 changer transitions 25/442 dead transitions. [2022-07-12 10:00:40,423 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 442 transitions, 2686 flow [2022-07-12 10:00:40,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-12 10:00:40,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-07-12 10:00:40,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1151 transitions. [2022-07-12 10:00:40,427 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.841374269005848 [2022-07-12 10:00:40,427 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1151 transitions. [2022-07-12 10:00:40,427 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1151 transitions. [2022-07-12 10:00:40,428 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:00:40,428 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1151 transitions. [2022-07-12 10:00:40,431 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 95.91666666666667) internal successors, (1151), 12 states have internal predecessors, (1151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:00:40,433 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 114.0) internal successors, (1482), 13 states have internal predecessors, (1482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:00:40,434 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 114.0) internal successors, (1482), 13 states have internal predecessors, (1482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:00:40,434 INFO L186 Difference]: Start difference. First operand has 124 places, 143 transitions, 510 flow. Second operand 12 states and 1151 transitions. [2022-07-12 10:00:40,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 442 transitions, 2686 flow [2022-07-12 10:00:40,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 442 transitions, 2680 flow, removed 3 selfloop flow, removed 0 redundant places. [2022-07-12 10:00:40,702 INFO L242 Difference]: Finished difference. Result has 143 places, 298 transitions, 1900 flow [2022-07-12 10:00:40,703 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=114, PETRI_DIFFERENCE_MINUEND_FLOW=506, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1900, PETRI_PLACES=143, PETRI_TRANSITIONS=298} [2022-07-12 10:00:40,709 INFO L279 CegarLoopForPetriNet]: 107 programPoint places, 36 predicate places. [2022-07-12 10:00:40,709 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 298 transitions, 1900 flow [2022-07-12 10:00:40,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 85.16666666666667) internal successors, (511), 6 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:00:40,710 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:00:40,710 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] [2022-07-12 10:00:40,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-12 10:00:40,711 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-12 10:00:40,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:00:40,711 INFO L85 PathProgramCache]: Analyzing trace with hash -1097766141, now seen corresponding path program 1 times [2022-07-12 10:00:40,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:00:40,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502992362] [2022-07-12 10:00:40,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:00:40,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:00:40,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:00:40,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:00:40,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:00:40,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502992362] [2022-07-12 10:00:40,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502992362] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:00:40,784 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:00:40,785 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 10:00:40,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503469056] [2022-07-12 10:00:40,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:00:40,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 10:00:40,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:00:40,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 10:00:40,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-12 10:00:40,787 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 114 [2022-07-12 10:00:40,788 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 298 transitions, 1900 flow. Second operand has 6 states, 6 states have (on average 85.66666666666667) internal successors, (514), 6 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:00:40,788 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:00:40,788 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 114 [2022-07-12 10:00:40,788 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:00:43,134 INFO L129 PetriNetUnfolder]: 9006/19880 cut-off events. [2022-07-12 10:00:43,134 INFO L130 PetriNetUnfolder]: For 29259/29357 co-relation queries the response was YES. [2022-07-12 10:00:43,226 INFO L84 FinitePrefix]: Finished finitePrefix Result has 59351 conditions, 19880 events. 9006/19880 cut-off events. For 29259/29357 co-relation queries the response was YES. Maximal size of possible extension queue 1796. Compared 221633 event pairs, 1488 based on Foata normal form. 223/19912 useless extension candidates. Maximal degree in co-relation 58727. Up to 4759 conditions per place. [2022-07-12 10:00:43,479 INFO L132 encePairwiseOnDemand]: 104/114 looper letters, 237 selfloop transitions, 206 changer transitions 5/524 dead transitions. [2022-07-12 10:00:43,480 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 524 transitions, 4189 flow [2022-07-12 10:00:43,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-12 10:00:43,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-07-12 10:00:43,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1235 transitions. [2022-07-12 10:00:43,483 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8333333333333334 [2022-07-12 10:00:43,484 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1235 transitions. [2022-07-12 10:00:43,484 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1235 transitions. [2022-07-12 10:00:43,484 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:00:43,485 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1235 transitions. [2022-07-12 10:00:43,487 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 95.0) internal successors, (1235), 13 states have internal predecessors, (1235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:00:43,490 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 114.0) internal successors, (1596), 14 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:00:43,490 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 114.0) internal successors, (1596), 14 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:00:43,490 INFO L186 Difference]: Start difference. First operand has 143 places, 298 transitions, 1900 flow. Second operand 13 states and 1235 transitions. [2022-07-12 10:00:43,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 524 transitions, 4189 flow [2022-07-12 10:00:44,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 524 transitions, 4189 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-12 10:00:44,056 INFO L242 Difference]: Finished difference. Result has 163 places, 386 transitions, 3338 flow [2022-07-12 10:00:44,057 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=114, PETRI_DIFFERENCE_MINUEND_FLOW=1900, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3338, PETRI_PLACES=163, PETRI_TRANSITIONS=386} [2022-07-12 10:00:44,060 INFO L279 CegarLoopForPetriNet]: 107 programPoint places, 56 predicate places. [2022-07-12 10:00:44,060 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 386 transitions, 3338 flow [2022-07-12 10:00:44,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 85.66666666666667) internal successors, (514), 6 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:00:44,061 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:00:44,061 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] [2022-07-12 10:00:44,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-12 10:00:44,062 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-12 10:00:44,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:00:44,063 INFO L85 PathProgramCache]: Analyzing trace with hash -1042275993, now seen corresponding path program 1 times [2022-07-12 10:00:44,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:00:44,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235264993] [2022-07-12 10:00:44,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:00:44,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:00:44,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:00:44,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:00:44,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:00:44,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235264993] [2022-07-12 10:00:44,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235264993] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:00:44,132 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:00:44,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 10:00:44,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043091808] [2022-07-12 10:00:44,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:00:44,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 10:00:44,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:00:44,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 10:00:44,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-12 10:00:44,134 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 114 [2022-07-12 10:00:44,135 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 386 transitions, 3338 flow. Second operand has 6 states, 6 states have (on average 85.66666666666667) internal successors, (514), 6 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:00:44,135 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:00:44,135 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 114 [2022-07-12 10:00:44,136 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:00:46,758 INFO L129 PetriNetUnfolder]: 9876/21673 cut-off events. [2022-07-12 10:00:46,758 INFO L130 PetriNetUnfolder]: For 52197/52248 co-relation queries the response was YES. [2022-07-12 10:00:46,949 INFO L84 FinitePrefix]: Finished finitePrefix Result has 71027 conditions, 21673 events. 9876/21673 cut-off events. For 52197/52248 co-relation queries the response was YES. Maximal size of possible extension queue 1940. Compared 241993 event pairs, 1828 based on Foata normal form. 239/21705 useless extension candidates. Maximal degree in co-relation 67915. Up to 5676 conditions per place. [2022-07-12 10:00:47,052 INFO L132 encePairwiseOnDemand]: 104/114 looper letters, 295 selfloop transitions, 249 changer transitions 8/643 dead transitions. [2022-07-12 10:00:47,052 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 643 transitions, 6329 flow [2022-07-12 10:00:47,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-12 10:00:47,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-07-12 10:00:47,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1239 transitions. [2022-07-12 10:00:47,057 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8360323886639676 [2022-07-12 10:00:47,057 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1239 transitions. [2022-07-12 10:00:47,058 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1239 transitions. [2022-07-12 10:00:47,059 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:00:47,060 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1239 transitions. [2022-07-12 10:00:47,064 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 95.3076923076923) internal successors, (1239), 13 states have internal predecessors, (1239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:00:47,070 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 114.0) internal successors, (1596), 14 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:00:47,072 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 114.0) internal successors, (1596), 14 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:00:47,072 INFO L186 Difference]: Start difference. First operand has 163 places, 386 transitions, 3338 flow. Second operand 13 states and 1239 transitions. [2022-07-12 10:00:47,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 643 transitions, 6329 flow [2022-07-12 10:00:48,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 643 transitions, 6261 flow, removed 18 selfloop flow, removed 1 redundant places. [2022-07-12 10:00:48,366 INFO L242 Difference]: Finished difference. Result has 182 places, 484 transitions, 5114 flow [2022-07-12 10:00:48,366 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=114, PETRI_DIFFERENCE_MINUEND_FLOW=3294, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5114, PETRI_PLACES=182, PETRI_TRANSITIONS=484} [2022-07-12 10:00:48,367 INFO L279 CegarLoopForPetriNet]: 107 programPoint places, 75 predicate places. [2022-07-12 10:00:48,367 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 484 transitions, 5114 flow [2022-07-12 10:00:48,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 85.66666666666667) internal successors, (514), 6 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:00:48,368 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:00:48,368 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] [2022-07-12 10:00:48,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-12 10:00:48,369 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-12 10:00:48,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:00:48,369 INFO L85 PathProgramCache]: Analyzing trace with hash -1127280812, now seen corresponding path program 1 times [2022-07-12 10:00:48,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:00:48,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618582815] [2022-07-12 10:00:48,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:00:48,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:00:48,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:00:48,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:00:48,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:00:48,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618582815] [2022-07-12 10:00:48,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618582815] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:00:48,594 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:00:48,594 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-12 10:00:48,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680364040] [2022-07-12 10:00:48,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:00:48,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 10:00:48,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:00:48,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 10:00:48,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-12 10:00:48,596 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 114 [2022-07-12 10:00:48,596 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 484 transitions, 5114 flow. Second operand has 5 states, 5 states have (on average 96.6) internal successors, (483), 5 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:00:48,597 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:00:48,597 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 114 [2022-07-12 10:00:48,597 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:00:49,004 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([261] L738-2-->L741: Formula: (= (+ (- 1) v_~r~0_3) |v_readerThread1of1ForFork3_~l~0#1_7|) InVars {~r~0=v_~r~0_3} OutVars{readerThread1of1ForFork3_~l~0#1=|v_readerThread1of1ForFork3_~l~0#1_7|, ~r~0=v_~r~0_3} AuxVars[] AssignedVars[readerThread1of1ForFork3_~l~0#1][244], [Black: 171#true, Black: 241#(and (= ~y~0 ~x~0) (= |readerThread1of1ForFork0_~l~0#1| ~x~0)), Black: 182#(and (= |readerThread1of1ForFork3_~ly~0#1| ~x~0) (= ~y~0 ~x~0) (= |readerThread1of1ForFork3_~lx~0#1| |readerThread1of1ForFork3_~ly~0#1|) (= ~x~0 |readerThread1of1ForFork3_~l~0#1|)), Black: 244#(and (= |readerThread1of1ForFork3_~ly~0#1| ~x~0) (= ~y~0 ~x~0) (= |readerThread1of1ForFork0_~l~0#1| ~x~0)), Black: 234#true, Black: 180#(and (= |readerThread1of1ForFork3_~ly~0#1| ~x~0) (= ~y~0 ~x~0) (= ~x~0 |readerThread1of1ForFork3_~l~0#1|)), Black: 254#(and (= |readerThread1of1ForFork3_~ly~0#1| ~x~0) (= ~y~0 ~x~0) (= |readerThread1of1ForFork3_~lx~0#1| |readerThread1of1ForFork3_~ly~0#1|)), Black: 186#(and (= |readerThread1of1ForFork3_~ly~0#1| ~x~0) (= ~x~0 |readerThread1of1ForFork3_~l~0#1|)), Black: 252#(and (= |readerThread1of1ForFork3_~ly~0#1| ~x~0) (= ~y~0 ~x~0)), Black: 173#(= ~x~0 |readerThread1of1ForFork3_~l~0#1|), Black: 246#(and (= |readerThread1of1ForFork3_~ly~0#1| ~x~0) (= ~y~0 ~x~0) (= |readerThread1of1ForFork3_~lx~0#1| |readerThread1of1ForFork3_~ly~0#1|) (= |readerThread1of1ForFork0_~l~0#1| ~x~0)), Black: 188#(and (= |readerThread1of1ForFork3_~ly~0#1| ~x~0) (= |readerThread1of1ForFork3_~lx~0#1| |readerThread1of1ForFork3_~ly~0#1|) (= ~x~0 |readerThread1of1ForFork3_~l~0#1|)), Black: 237#(= ~y~0 ~x~0), Black: 178#(and (= ~y~0 ~x~0) (= ~x~0 |readerThread1of1ForFork3_~l~0#1|)), 133#(= |readerThread1of1ForFork0_~lx~0#1| |readerThread1of1ForFork0_~ly~0#1|), 118#L741true, 239#(= |readerThread1of1ForFork3_~lx~0#1| |readerThread1of1ForFork3_~ly~0#1|), Black: 130#(= |readerThread1of1ForFork0_~l~0#1| ~x~0), Black: 139#(and (= ~y~0 ~x~0) (= ~x~0 |readerThread1of1ForFork0_~ly~0#1|) (= |readerThread1of1ForFork0_~l~0#1| ~x~0) (= |readerThread1of1ForFork0_~lx~0#1| |readerThread1of1ForFork0_~ly~0#1|)), Black: 143#(and (= ~x~0 |readerThread1of1ForFork0_~ly~0#1|) (= |readerThread1of1ForFork0_~l~0#1| ~x~0)), Black: 145#(and (= ~x~0 |readerThread1of1ForFork0_~ly~0#1|) (= |readerThread1of1ForFork0_~l~0#1| ~x~0) (= |readerThread1of1ForFork0_~lx~0#1| |readerThread1of1ForFork0_~ly~0#1|)), Black: 137#(and (= ~y~0 ~x~0) (= ~x~0 |readerThread1of1ForFork0_~ly~0#1|) (= |readerThread1of1ForFork0_~l~0#1| ~x~0)), Black: 135#(and (= ~y~0 ~x~0) (= |readerThread1of1ForFork0_~l~0#1| ~x~0)), Black: 128#true, Black: 220#(and (= ~y~0 ~x~0) (= ~x~0 |readerThread1of1ForFork0_~ly~0#1|)), Black: 205#(= ~y~0 ~x~0), Black: 216#(and (= ~y~0 ~x~0) (= ~x~0 |readerThread1of1ForFork0_~ly~0#1|) (= |readerThread1of1ForFork0_~lx~0#1| |readerThread1of1ForFork0_~ly~0#1|) (= ~x~0 |readerThread1of1ForFork3_~l~0#1|)), 59#L754-2true, Black: 222#(and (= ~y~0 ~x~0) (= ~x~0 |readerThread1of1ForFork0_~ly~0#1|) (= |readerThread1of1ForFork0_~lx~0#1| |readerThread1of1ForFork0_~ly~0#1|)), Black: 209#(and (= ~y~0 ~x~0) (= ~x~0 |readerThread1of1ForFork3_~l~0#1|)), Black: 202#true, Black: 212#(and (= ~y~0 ~x~0) (= ~x~0 |readerThread1of1ForFork0_~ly~0#1|) (= ~x~0 |readerThread1of1ForFork3_~l~0#1|)), 268#(= ~r~0 0), 74#L717true, 169#(and (not (= ~w~0 0)) (= ~r~0 0)), readerThread1of1ForFork3InUse, 207#(= |readerThread1of1ForFork0_~lx~0#1| |readerThread1of1ForFork0_~ly~0#1|), 176#(= |readerThread1of1ForFork3_~lx~0#1| |readerThread1of1ForFork3_~ly~0#1|)]) [2022-07-12 10:00:49,004 INFO L384 tUnfolder$Statistics]: this new event has 79 ancestors and is cut-off event [2022-07-12 10:00:49,004 INFO L387 tUnfolder$Statistics]: existing Event has 79 ancestors and is cut-off event [2022-07-12 10:00:49,004 INFO L387 tUnfolder$Statistics]: existing Event has 79 ancestors and is cut-off event [2022-07-12 10:00:49,004 INFO L387 tUnfolder$Statistics]: existing Event has 79 ancestors and is cut-off event [2022-07-12 10:00:49,026 INFO L129 PetriNetUnfolder]: 947/3465 cut-off events. [2022-07-12 10:00:49,026 INFO L130 PetriNetUnfolder]: For 8687/8759 co-relation queries the response was YES. [2022-07-12 10:00:49,046 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10659 conditions, 3465 events. 947/3465 cut-off events. For 8687/8759 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 34487 event pairs, 124 based on Foata normal form. 114/3539 useless extension candidates. Maximal degree in co-relation 10387. Up to 547 conditions per place. [2022-07-12 10:00:49,055 INFO L132 encePairwiseOnDemand]: 107/114 looper letters, 40 selfloop transitions, 11 changer transitions 44/281 dead transitions. [2022-07-12 10:00:49,055 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 281 transitions, 2262 flow [2022-07-12 10:00:49,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 10:00:49,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-12 10:00:49,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 522 transitions. [2022-07-12 10:00:49,057 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9157894736842105 [2022-07-12 10:00:49,057 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 522 transitions. [2022-07-12 10:00:49,058 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 522 transitions. [2022-07-12 10:00:49,058 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:00:49,058 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 522 transitions. [2022-07-12 10:00:49,060 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 104.4) internal successors, (522), 5 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:00:49,061 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 114.0) internal successors, (684), 6 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:00:49,061 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 114.0) internal successors, (684), 6 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:00:49,062 INFO L186 Difference]: Start difference. First operand has 182 places, 484 transitions, 5114 flow. Second operand 5 states and 522 transitions. [2022-07-12 10:00:49,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 281 transitions, 2262 flow [2022-07-12 10:00:49,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 281 transitions, 2219 flow, removed 8 selfloop flow, removed 1 redundant places. [2022-07-12 10:00:49,150 INFO L242 Difference]: Finished difference. Result has 185 places, 226 transitions, 1692 flow [2022-07-12 10:00:49,150 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=114, PETRI_DIFFERENCE_MINUEND_FLOW=1874, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1692, PETRI_PLACES=185, PETRI_TRANSITIONS=226} [2022-07-12 10:00:49,151 INFO L279 CegarLoopForPetriNet]: 107 programPoint places, 78 predicate places. [2022-07-12 10:00:49,151 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 226 transitions, 1692 flow [2022-07-12 10:00:49,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 96.6) internal successors, (483), 5 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:00:49,151 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:00:49,152 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, 1, 1, 1, 1, 1] [2022-07-12 10:00:49,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-12 10:00:49,152 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-12 10:00:49,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:00:49,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1072455534, now seen corresponding path program 1 times [2022-07-12 10:00:49,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:00:49,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713825687] [2022-07-12 10:00:49,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:00:49,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:00:49,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:00:49,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:00:49,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:00:49,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713825687] [2022-07-12 10:00:49,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713825687] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:00:49,276 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:00:49,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 10:00:49,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874599296] [2022-07-12 10:00:49,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:00:49,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 10:00:49,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:00:49,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 10:00:49,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-12 10:00:49,279 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 114 [2022-07-12 10:00:49,280 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 226 transitions, 1692 flow. Second operand has 6 states, 6 states have (on average 94.16666666666667) internal successors, (565), 6 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:00:49,280 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:00:49,280 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 114 [2022-07-12 10:00:49,280 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:00:49,728 INFO L129 PetriNetUnfolder]: 879/3214 cut-off events. [2022-07-12 10:00:49,728 INFO L130 PetriNetUnfolder]: For 8924/8988 co-relation queries the response was YES. [2022-07-12 10:00:49,746 INFO L84 FinitePrefix]: Finished finitePrefix Result has 10814 conditions, 3214 events. 879/3214 cut-off events. For 8924/8988 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 32086 event pairs, 138 based on Foata normal form. 12/3192 useless extension candidates. Maximal degree in co-relation 10370. Up to 328 conditions per place. [2022-07-12 10:00:49,752 INFO L132 encePairwiseOnDemand]: 106/114 looper letters, 55 selfloop transitions, 17 changer transitions 37/283 dead transitions. [2022-07-12 10:00:49,752 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 283 transitions, 2246 flow [2022-07-12 10:00:49,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 10:00:49,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-12 10:00:49,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 803 transitions. [2022-07-12 10:00:49,755 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8804824561403509 [2022-07-12 10:00:49,755 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 803 transitions. [2022-07-12 10:00:49,755 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 803 transitions. [2022-07-12 10:00:49,756 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:00:49,756 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 803 transitions. [2022-07-12 10:00:49,758 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 100.375) internal successors, (803), 8 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:00:49,759 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 114.0) internal successors, (1026), 9 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:00:49,760 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 114.0) internal successors, (1026), 9 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:00:49,760 INFO L186 Difference]: Start difference. First operand has 185 places, 226 transitions, 1692 flow. Second operand 8 states and 803 transitions. [2022-07-12 10:00:49,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 283 transitions, 2246 flow [2022-07-12 10:00:49,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 283 transitions, 2191 flow, removed 6 selfloop flow, removed 4 redundant places. [2022-07-12 10:00:49,839 INFO L242 Difference]: Finished difference. Result has 189 places, 226 transitions, 1707 flow [2022-07-12 10:00:49,840 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=114, PETRI_DIFFERENCE_MINUEND_FLOW=1661, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1707, PETRI_PLACES=189, PETRI_TRANSITIONS=226} [2022-07-12 10:00:49,840 INFO L279 CegarLoopForPetriNet]: 107 programPoint places, 82 predicate places. [2022-07-12 10:00:49,841 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 226 transitions, 1707 flow [2022-07-12 10:00:49,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 94.16666666666667) internal successors, (565), 6 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:00:49,841 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:00:49,841 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, 1, 1, 1, 1, 1] [2022-07-12 10:00:49,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-12 10:00:49,842 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-12 10:00:49,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:00:49,842 INFO L85 PathProgramCache]: Analyzing trace with hash -143796270, now seen corresponding path program 2 times [2022-07-12 10:00:49,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:00:49,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425072978] [2022-07-12 10:00:49,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:00:49,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:00:49,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 10:00:49,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 10:00:49,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 10:00:49,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425072978] [2022-07-12 10:00:49,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425072978] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 10:00:49,902 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 10:00:49,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 10:00:49,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793349762] [2022-07-12 10:00:49,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 10:00:49,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 10:00:49,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 10:00:49,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 10:00:49,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-12 10:00:49,905 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 114 [2022-07-12 10:00:49,905 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 226 transitions, 1707 flow. Second operand has 6 states, 6 states have (on average 94.16666666666667) internal successors, (565), 6 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:00:49,906 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-12 10:00:49,906 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 114 [2022-07-12 10:00:49,906 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-12 10:00:50,267 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([246] L738-2-->L741: Formula: (= (+ (- 1) v_~r~0_3) |v_readerThread1of1ForFork0_~l~0#1_7|) InVars {~r~0=v_~r~0_3} OutVars{readerThread1of1ForFork0_~l~0#1=|v_readerThread1of1ForFork0_~l~0#1_7|, ~r~0=v_~r~0_3} AuxVars[] AssignedVars[readerThread1of1ForFork0_~l~0#1][223], [Black: 241#(and (= ~y~0 ~x~0) (= |readerThread1of1ForFork0_~l~0#1| ~x~0)), Black: 171#true, Black: 244#(and (= |readerThread1of1ForFork3_~ly~0#1| ~x~0) (= ~y~0 ~x~0) (= |readerThread1of1ForFork0_~l~0#1| ~x~0)), Black: 182#(and (= |readerThread1of1ForFork3_~ly~0#1| ~x~0) (= ~y~0 ~x~0) (= |readerThread1of1ForFork3_~lx~0#1| |readerThread1of1ForFork3_~ly~0#1|) (= ~x~0 |readerThread1of1ForFork3_~l~0#1|)), 288#(= ~r~0 0), Black: 234#true, Black: 180#(and (= |readerThread1of1ForFork3_~ly~0#1| ~x~0) (= ~y~0 ~x~0) (= ~x~0 |readerThread1of1ForFork3_~l~0#1|)), Black: 254#(and (= |readerThread1of1ForFork3_~ly~0#1| ~x~0) (= ~y~0 ~x~0) (= |readerThread1of1ForFork3_~lx~0#1| |readerThread1of1ForFork3_~ly~0#1|)), Black: 186#(and (= |readerThread1of1ForFork3_~ly~0#1| ~x~0) (= ~x~0 |readerThread1of1ForFork3_~l~0#1|)), Black: 252#(and (= |readerThread1of1ForFork3_~ly~0#1| ~x~0) (= ~y~0 ~x~0)), Black: 173#(= ~x~0 |readerThread1of1ForFork3_~l~0#1|), Black: 246#(and (= |readerThread1of1ForFork3_~ly~0#1| ~x~0) (= ~y~0 ~x~0) (= |readerThread1of1ForFork3_~lx~0#1| |readerThread1of1ForFork3_~ly~0#1|) (= |readerThread1of1ForFork0_~l~0#1| ~x~0)), Black: 188#(and (= |readerThread1of1ForFork3_~ly~0#1| ~x~0) (= |readerThread1of1ForFork3_~lx~0#1| |readerThread1of1ForFork3_~ly~0#1|) (= ~x~0 |readerThread1of1ForFork3_~l~0#1|)), 274#(= ~r~0 0), Black: 237#(= ~y~0 ~x~0), Black: 178#(and (= ~y~0 ~x~0) (= ~x~0 |readerThread1of1ForFork3_~l~0#1|)), 133#(= |readerThread1of1ForFork0_~lx~0#1| |readerThread1of1ForFork0_~ly~0#1|), 239#(= |readerThread1of1ForFork3_~lx~0#1| |readerThread1of1ForFork3_~ly~0#1|), Black: 130#(= |readerThread1of1ForFork0_~l~0#1| ~x~0), Black: 139#(and (= ~y~0 ~x~0) (= ~x~0 |readerThread1of1ForFork0_~ly~0#1|) (= |readerThread1of1ForFork0_~l~0#1| ~x~0) (= |readerThread1of1ForFork0_~lx~0#1| |readerThread1of1ForFork0_~ly~0#1|)), Black: 143#(and (= ~x~0 |readerThread1of1ForFork0_~ly~0#1|) (= |readerThread1of1ForFork0_~l~0#1| ~x~0)), Black: 145#(and (= ~x~0 |readerThread1of1ForFork0_~ly~0#1|) (= |readerThread1of1ForFork0_~l~0#1| ~x~0) (= |readerThread1of1ForFork0_~lx~0#1| |readerThread1of1ForFork0_~ly~0#1|)), Black: 137#(and (= ~y~0 ~x~0) (= ~x~0 |readerThread1of1ForFork0_~ly~0#1|) (= |readerThread1of1ForFork0_~l~0#1| ~x~0)), Black: 135#(and (= ~y~0 ~x~0) (= |readerThread1of1ForFork0_~l~0#1| ~x~0)), Black: 128#true, Black: 275#(<= 1 ~r~0), Black: 220#(and (= ~y~0 ~x~0) (= ~x~0 |readerThread1of1ForFork0_~ly~0#1|)), Black: 205#(= ~y~0 ~x~0), Black: 216#(and (= ~y~0 ~x~0) (= ~x~0 |readerThread1of1ForFork0_~ly~0#1|) (= |readerThread1of1ForFork0_~lx~0#1| |readerThread1of1ForFork0_~ly~0#1|) (= ~x~0 |readerThread1of1ForFork3_~l~0#1|)), Black: 222#(and (= ~y~0 ~x~0) (= ~x~0 |readerThread1of1ForFork0_~ly~0#1|) (= |readerThread1of1ForFork0_~lx~0#1| |readerThread1of1ForFork0_~ly~0#1|)), Black: 209#(and (= ~y~0 ~x~0) (= ~x~0 |readerThread1of1ForFork3_~l~0#1|)), Black: 202#true, Black: 212#(and (= ~y~0 ~x~0) (= ~x~0 |readerThread1of1ForFork0_~ly~0#1|) (= ~x~0 |readerThread1of1ForFork3_~l~0#1|)), 43#L744true, 74#L717true, 35#L741true, 76#L753-2true, 207#(= |readerThread1of1ForFork0_~lx~0#1| |readerThread1of1ForFork0_~ly~0#1|), readerThread1of1ForFork3InUse, 176#(= |readerThread1of1ForFork3_~lx~0#1| |readerThread1of1ForFork3_~ly~0#1|)]) [2022-07-12 10:00:50,267 INFO L384 tUnfolder$Statistics]: this new event has 74 ancestors and is cut-off event [2022-07-12 10:00:50,267 INFO L387 tUnfolder$Statistics]: existing Event has 74 ancestors and is cut-off event [2022-07-12 10:00:50,267 INFO L387 tUnfolder$Statistics]: existing Event has 74 ancestors and is cut-off event [2022-07-12 10:00:50,267 INFO L387 tUnfolder$Statistics]: existing Event has 74 ancestors and is cut-off event [2022-07-12 10:00:50,296 INFO L129 PetriNetUnfolder]: 672/2660 cut-off events. [2022-07-12 10:00:50,296 INFO L130 PetriNetUnfolder]: For 7007/7077 co-relation queries the response was YES. [2022-07-12 10:00:50,313 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8709 conditions, 2660 events. 672/2660 cut-off events. For 7007/7077 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 25741 event pairs, 128 based on Foata normal form. 63/2683 useless extension candidates. Maximal degree in co-relation 8405. Up to 406 conditions per place. [2022-07-12 10:00:50,318 INFO L132 encePairwiseOnDemand]: 106/114 looper letters, 51 selfloop transitions, 14 changer transitions 23/244 dead transitions. [2022-07-12 10:00:50,318 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 244 transitions, 1889 flow [2022-07-12 10:00:50,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 10:00:50,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-12 10:00:50,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 699 transitions. [2022-07-12 10:00:50,320 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8759398496240601 [2022-07-12 10:00:50,321 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 699 transitions. [2022-07-12 10:00:50,321 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 699 transitions. [2022-07-12 10:00:50,321 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-12 10:00:50,321 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 699 transitions. [2022-07-12 10:00:50,323 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 99.85714285714286) internal successors, (699), 7 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:00:50,324 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 114.0) internal successors, (912), 8 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:00:50,325 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 114.0) internal successors, (912), 8 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:00:50,325 INFO L186 Difference]: Start difference. First operand has 189 places, 226 transitions, 1707 flow. Second operand 7 states and 699 transitions. [2022-07-12 10:00:50,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 244 transitions, 1889 flow [2022-07-12 10:00:50,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 244 transitions, 1830 flow, removed 1 selfloop flow, removed 3 redundant places. [2022-07-12 10:00:50,377 INFO L242 Difference]: Finished difference. Result has 192 places, 203 transitions, 1418 flow [2022-07-12 10:00:50,377 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=114, PETRI_DIFFERENCE_MINUEND_FLOW=1457, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1418, PETRI_PLACES=192, PETRI_TRANSITIONS=203} [2022-07-12 10:00:50,377 INFO L279 CegarLoopForPetriNet]: 107 programPoint places, 85 predicate places. [2022-07-12 10:00:50,378 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 203 transitions, 1418 flow [2022-07-12 10:00:50,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 94.16666666666667) internal successors, (565), 6 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 10:00:50,378 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-12 10:00:50,378 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, 1, 1, 1, 1, 1] [2022-07-12 10:00:50,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-12 10:00:50,378 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-07-12 10:00:50,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 10:00:50,379 INFO L85 PathProgramCache]: Analyzing trace with hash 571210246, now seen corresponding path program 3 times [2022-07-12 10:00:50,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 10:00:50,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468224757] [2022-07-12 10:00:50,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 10:00:50,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 10:00:50,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:00:50,411 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-12 10:00:50,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-12 10:00:50,453 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-12 10:00:50,454 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-12 10:00:50,455 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location readerErr0ASSERT_VIOLATIONERROR_FUNCTION (6 of 7 remaining) [2022-07-12 10:00:50,457 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location readerErr0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2022-07-12 10:00:50,459 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 7 remaining) [2022-07-12 10:00:50,459 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 7 remaining) [2022-07-12 10:00:50,459 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 7 remaining) [2022-07-12 10:00:50,459 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 7 remaining) [2022-07-12 10:00:50,459 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location readerErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2022-07-12 10:00:50,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-12 10:00:50,460 INFO L356 BasicCegarLoop]: Path program histogram: [3, 2, 1, 1, 1, 1, 1] [2022-07-12 10:00:50,465 INFO L226 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-07-12 10:00:50,465 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-12 10:00:50,517 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.07 10:00:50 BasicIcfg [2022-07-12 10:00:50,517 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-12 10:00:50,518 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-12 10:00:50,518 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-12 10:00:50,518 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-12 10:00:50,519 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 10:00:34" (3/4) ... [2022-07-12 10:00:50,520 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-07-12 10:00:50,571 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2022-07-12 10:00:50,571 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-12 10:00:50,572 INFO L158 Benchmark]: Toolchain (without parser) took 16626.17ms. Allocated memory was 121.6MB in the beginning and 4.9GB in the end (delta: 4.8GB). Free memory was 99.6MB in the beginning and 4.2GB in the end (delta: -4.1GB). Peak memory consumption was 627.9MB. Max. memory is 16.1GB. [2022-07-12 10:00:50,572 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 88.1MB. Free memory was 62.1MB in the beginning and 62.1MB in the end (delta: 44.5kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-12 10:00:50,572 INFO L158 Benchmark]: CACSL2BoogieTranslator took 385.36ms. Allocated memory is still 121.6MB. Free memory was 99.6MB in the beginning and 93.0MB in the end (delta: 6.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-07-12 10:00:50,573 INFO L158 Benchmark]: Boogie Procedure Inliner took 48.16ms. Allocated memory is still 121.6MB. Free memory was 93.0MB in the beginning and 90.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-12 10:00:50,573 INFO L158 Benchmark]: Boogie Preprocessor took 21.14ms. Allocated memory is still 121.6MB. Free memory was 90.8MB in the beginning and 89.5MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-12 10:00:50,573 INFO L158 Benchmark]: RCFGBuilder took 482.21ms. Allocated memory is still 121.6MB. Free memory was 89.2MB in the beginning and 74.9MB in the end (delta: 14.3MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-07-12 10:00:50,574 INFO L158 Benchmark]: TraceAbstraction took 15616.43ms. Allocated memory was 121.6MB in the beginning and 4.9GB in the end (delta: 4.8GB). Free memory was 74.1MB in the beginning and 4.2GB in the end (delta: -4.2GB). Peak memory consumption was 595.1MB. Max. memory is 16.1GB. [2022-07-12 10:00:50,574 INFO L158 Benchmark]: Witness Printer took 53.43ms. Allocated memory is still 4.9GB. Free memory was 4.2GB in the beginning and 4.2GB in the end (delta: 12.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-07-12 10:00:50,576 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 88.1MB. Free memory was 62.1MB in the beginning and 62.1MB in the end (delta: 44.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 385.36ms. Allocated memory is still 121.6MB. Free memory was 99.6MB in the beginning and 93.0MB in the end (delta: 6.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 48.16ms. Allocated memory is still 121.6MB. Free memory was 93.0MB in the beginning and 90.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 21.14ms. Allocated memory is still 121.6MB. Free memory was 90.8MB in the beginning and 89.5MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 482.21ms. Allocated memory is still 121.6MB. Free memory was 89.2MB in the beginning and 74.9MB in the end (delta: 14.3MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 15616.43ms. Allocated memory was 121.6MB in the beginning and 4.9GB in the end (delta: 4.8GB). Free memory was 74.1MB in the beginning and 4.2GB in the end (delta: -4.2GB). Peak memory consumption was 595.1MB. Max. memory is 16.1GB. * Witness Printer took 53.43ms. Allocated memory is still 4.9GB. Free memory was 4.2GB in the beginning and 4.2GB in the end (delta: 12.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 738]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L704] 0 int w=0, r=0, x, y; VAL [r=0, w=0, x=0, y=0] [L748] 0 pthread_t t1, t2, t3, t4; VAL [r=0, t1={6:0}, t2={7:0}, t3={8:0}, t4={5:0}, w=0, x=0, y=0] [L749] FCALL, FORK 0 pthread_create(&t1, 0, writer, 0) VAL [pthread_create(&t1, 0, writer, 0)=-3, r=0, t1={6:0}, t2={7:0}, t3={8:0}, t4={5:0}, w=0, x=0, y=0] [L750] FCALL, FORK 0 pthread_create(&t2, 0, reader, 0) VAL [pthread_create(&t2, 0, reader, 0)=-2, r=0, t1={6:0}, t2={7:0}, t3={8:0}, t4={5:0}, w=0, x=0, y=0] [L724] 2 int l; VAL [arg={0:0}, arg={0:0}, r=0, w=0, x=0, y=0] [L725] CALL 2 __VERIFIER_atomic_take_read_lock() [L710] CALL 2 assume_abort_if_not(w==0) [L3] COND FALSE 2 !(!cond) [L710] RET 2 assume_abort_if_not(w==0) [L711] 2 r = r+1 [L725] RET 2 __VERIFIER_atomic_take_read_lock() [L751] FCALL, FORK 0 pthread_create(&t3, 0, writer, 0) VAL [pthread_create(&t3, 0, writer, 0)=-1, r=1, t1={6:0}, t2={7:0}, t3={8:0}, t4={5:0}, w=0, x=0, y=0] [L752] FCALL, FORK 0 pthread_create(&t4, 0, reader, 0) VAL [pthread_create(&t4, 0, reader, 0)=0, r=1, t1={6:0}, t2={7:0}, t3={8:0}, t4={5:0}, w=0, x=0, y=0] [L727] 2 l = x VAL [arg={0:0}, arg={0:0}, l=0, r=1, w=0, x=0, y=0] [L730] 2 y = l VAL [arg={0:0}, arg={0:0}, l=0, r=1, w=0, x=0, y=0] [L733] 2 int ly = y; VAL [arg={0:0}, arg={0:0}, l=0, ly=0, r=1, w=0, x=0, y=0] [L736] 2 int lx = x; VAL [arg={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=1, w=0, x=0, y=0] [L738] COND FALSE 2 !(!(ly == lx)) VAL [arg={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=1, w=0, x=0, y=0] [L740] 2 l = r-1 VAL [arg={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=1, w=0, x=0, y=0] [L724] 4 int l; VAL [arg={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=1, w=0, x=0, y=0] [L725] CALL 4 __VERIFIER_atomic_take_read_lock() [L710] CALL 4 assume_abort_if_not(w==0) [L3] COND FALSE 4 !(!cond) [L710] RET 4 assume_abort_if_not(w==0) [L711] 4 r = r+1 [L725] RET 4 __VERIFIER_atomic_take_read_lock() [L743] 2 r = l VAL [arg={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=0, w=0, x=0, y=0] [L714] CALL 1 __VERIFIER_atomic_take_write_lock() [L706] CALL 1 assume_abort_if_not(w==0 && r==0) [L3] COND FALSE 1 !(!cond) [L706] RET 1 assume_abort_if_not(w==0 && r==0) [L707] 1 w = 1 [L714] RET 1 __VERIFIER_atomic_take_write_lock() [L727] 4 l = x VAL [arg={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=0, w=1, x=0, y=0] [L730] 4 y = l VAL [arg={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=0, w=1, x=0, y=0] [L733] 4 int ly = y; VAL [arg={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=0, w=1, x=0, y=0] [L716] 1 x = 3 VAL [arg={0:0}, arg={0:0}, r=0, w=1, x=3, y=0] [L736] 4 int lx = x; VAL [arg={0:0}, arg={0:0}, l=0, lx=3, ly=0, r=0, w=1, x=3, y=0] [L738] COND TRUE 4 !(ly == lx) VAL [arg={0:0}, arg={0:0}, l=0, lx=3, ly=0, r=0, w=1, x=3, y=0] [L738] 4 reach_error() VAL [arg={0:0}, arg={0:0}, l=0, lx=3, ly=0, r=0, w=1, x=3, y=0] - UnprovableResult [Line: 749]: 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. - UnprovableResult [Line: 752]: 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. - UnprovableResult [Line: 750]: 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. - UnprovableResult [Line: 751]: 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 7 procedures, 139 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: 15.4s, OverallIterations: 10, TraceHistogramMax: 1, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 14.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 600 SdHoareTripleChecker+Valid, 1.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 600 mSDsluCounter, 391 SdHoareTripleChecker+Invalid, 0.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 767 mSDsCounter, 51 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1491 IncrementalHoareTripleChecker+Invalid, 1542 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 51 mSolverCounterUnsat, 169 mSDtfsCounter, 1491 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 90 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=5114occurred in iteration=6, InterpolantAutomatonStates: 78, 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, 0.2s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 535 NumberOfCodeBlocks, 535 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 462 ConstructedInterpolants, 0 QuantifiedInterpolants, 856 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 9 InterpolantComputations, 9 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-07-12 10:00:50,611 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