./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 35987657 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-?-3598765 [2022-07-21 08:34:48,443 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 08:34:48,446 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 08:34:48,490 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 08:34:48,490 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 08:34:48,491 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 08:34:48,496 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 08:34:48,499 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 08:34:48,501 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 08:34:48,507 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 08:34:48,508 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 08:34:48,510 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 08:34:48,511 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 08:34:48,513 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 08:34:48,514 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 08:34:48,521 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 08:34:48,522 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 08:34:48,524 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 08:34:48,526 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 08:34:48,532 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 08:34:48,534 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 08:34:48,536 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 08:34:48,537 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 08:34:48,538 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 08:34:48,540 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 08:34:48,542 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 08:34:48,543 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 08:34:48,543 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 08:34:48,544 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 08:34:48,544 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 08:34:48,545 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 08:34:48,545 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 08:34:48,547 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 08:34:48,548 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 08:34:48,549 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 08:34:48,550 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 08:34:48,550 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 08:34:48,551 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 08:34:48,551 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 08:34:48,551 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 08:34:48,552 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 08:34:48,553 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 08:34:48,554 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-21 08:34:48,588 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 08:34:48,588 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 08:34:48,589 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 08:34:48,589 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 08:34:48,590 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 08:34:48,590 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 08:34:48,591 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 08:34:48,591 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 08:34:48,591 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 08:34:48,592 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 08:34:48,592 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 08:34:48,593 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 08:34:48,593 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 08:34:48,593 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 08:34:48,593 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 08:34:48,593 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 08:34:48,594 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 08:34:48,594 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 08:34:48,594 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 08:34:48,594 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 08:34:48,595 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 08:34:48,595 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 08:34:48,595 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 08:34:48,595 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 08:34:48,595 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 08:34:48,596 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 08:34:48,596 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 08:34:48,596 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 08:34:48,596 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 08:34:48,596 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 08:34:48,597 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 08:34:48,597 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 08:34:48,597 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 08:34:48,597 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3e2f466b16db44ce2fec1aabf9e70b4ab734ef2801c32e66d10c5bcbcceb5301 [2022-07-21 08:34:48,959 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 08:34:48,989 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 08:34:48,992 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 08:34:48,993 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 08:34:48,993 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 08:34:48,995 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-atomic/read_write_lock-2.i [2022-07-21 08:34:49,061 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c48d0d073/508e93cd695e4fdc83808c8325eff9ab/FLAG4365accd6 [2022-07-21 08:34:49,612 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 08:34:49,613 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-atomic/read_write_lock-2.i [2022-07-21 08:34:49,625 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c48d0d073/508e93cd695e4fdc83808c8325eff9ab/FLAG4365accd6 [2022-07-21 08:34:50,069 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c48d0d073/508e93cd695e4fdc83808c8325eff9ab [2022-07-21 08:34:50,071 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 08:34:50,072 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 08:34:50,075 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 08:34:50,075 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 08:34:50,082 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 08:34:50,082 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:34:50" (1/1) ... [2022-07-21 08:34:50,084 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@189b034a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:34:50, skipping insertion in model container [2022-07-21 08:34:50,084 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:34:50" (1/1) ... [2022-07-21 08:34:50,093 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 08:34:50,133 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 08:34:50,270 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-07-21 08:34:50,396 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] [2022-07-21 08:34:50,409 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 08:34:50,425 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 08:34:50,453 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-07-21 08:34:50,477 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] [2022-07-21 08:34:50,486 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 08:34:50,523 INFO L208 MainTranslator]: Completed translation [2022-07-21 08:34:50,523 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:34:50 WrapperNode [2022-07-21 08:34:50,524 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 08:34:50,525 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 08:34:50,525 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 08:34:50,525 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 08:34:50,531 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:34:50" (1/1) ... [2022-07-21 08:34:50,563 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:34:50" (1/1) ... [2022-07-21 08:34:50,590 INFO L137 Inliner]: procedures = 174, calls = 51, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 119 [2022-07-21 08:34:50,590 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 08:34:50,591 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 08:34:50,592 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 08:34:50,592 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 08:34:50,598 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:34:50" (1/1) ... [2022-07-21 08:34:50,599 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:34:50" (1/1) ... [2022-07-21 08:34:50,615 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:34:50" (1/1) ... [2022-07-21 08:34:50,616 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:34:50" (1/1) ... [2022-07-21 08:34:50,620 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:34:50" (1/1) ... [2022-07-21 08:34:50,629 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:34:50" (1/1) ... [2022-07-21 08:34:50,630 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:34:50" (1/1) ... [2022-07-21 08:34:50,639 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 08:34:50,649 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 08:34:50,650 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 08:34:50,650 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 08:34:50,652 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:34:50" (1/1) ... [2022-07-21 08:34:50,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 08:34:50,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:34:50,688 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) [2022-07-21 08:34:50,712 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 [2022-07-21 08:34:50,727 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-21 08:34:50,728 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-21 08:34:50,728 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-21 08:34:50,728 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 08:34:50,729 INFO L130 BoogieDeclarations]: Found specification of procedure reader [2022-07-21 08:34:50,729 INFO L138 BoogieDeclarations]: Found implementation of procedure reader [2022-07-21 08:34:50,730 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-21 08:34:50,730 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 08:34:50,730 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 08:34:50,730 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-21 08:34:50,730 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 08:34:50,730 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 08:34:50,731 INFO L130 BoogieDeclarations]: Found specification of procedure writer [2022-07-21 08:34:50,731 INFO L138 BoogieDeclarations]: Found implementation of procedure writer [2022-07-21 08:34:50,732 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-21 08:34:50,894 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 08:34:50,895 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 08:34:51,093 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 08:34:51,117 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 08:34:51,117 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-07-21 08:34:51,119 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:34:51 BoogieIcfgContainer [2022-07-21 08:34:51,119 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 08:34:51,129 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 08:34:51,129 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 08:34:51,132 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 08:34:51,132 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 08:34:50" (1/3) ... [2022-07-21 08:34:51,132 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@483ca194 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:34:51, skipping insertion in model container [2022-07-21 08:34:51,133 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:34:50" (2/3) ... [2022-07-21 08:34:51,133 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@483ca194 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:34:51, skipping insertion in model container [2022-07-21 08:34:51,133 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:34:51" (3/3) ... [2022-07-21 08:34:51,136 INFO L111 eAbstractionObserver]: Analyzing ICFG read_write_lock-2.i [2022-07-21 08:34:51,141 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-21 08:34:51,149 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 08:34:51,150 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-21 08:34:51,150 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-21 08:34:51,232 INFO L135 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-07-21 08:34:51,263 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 125 places, 114 transitions, 260 flow [2022-07-21 08:34:51,310 INFO L129 PetriNetUnfolder]: 2/110 cut-off events. [2022-07-21 08:34:51,311 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-07-21 08:34:51,316 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. [2022-07-21 08:34:51,317 INFO L82 GeneralOperation]: Start removeDead. Operand has 125 places, 114 transitions, 260 flow [2022-07-21 08:34:51,324 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 107 places, 96 transitions, 213 flow [2022-07-21 08:34:51,341 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:34:51,348 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@5a07664, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@761dafc1 [2022-07-21 08:34:51,349 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-07-21 08:34:51,379 INFO L129 PetriNetUnfolder]: 1/58 cut-off events. [2022-07-21 08:34:51,381 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-21 08:34:51,382 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:34:51,382 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] [2022-07-21 08:34:51,383 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)] === [2022-07-21 08:34:51,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:34:51,388 INFO L85 PathProgramCache]: Analyzing trace with hash 2006515335, now seen corresponding path program 1 times [2022-07-21 08:34:51,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:34:51,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547220471] [2022-07-21 08:34:51,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:34:51,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:34:51,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:34:51,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:34:51,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:34:51,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547220471] [2022-07-21 08:34:51,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547220471] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:34:51,689 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:34:51,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 08:34:51,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244189682] [2022-07-21 08:34:51,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:34:51,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 08:34:51,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:34:51,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 08:34:51,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-21 08:34:51,731 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 114 [2022-07-21 08:34:51,737 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) [2022-07-21 08:34:51,737 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:34:51,737 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 114 [2022-07-21 08:34:51,738 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:34:53,208 INFO L129 PetriNetUnfolder]: 3525/7769 cut-off events. [2022-07-21 08:34:53,208 INFO L130 PetriNetUnfolder]: For 1654/1654 co-relation queries the response was YES. [2022-07-21 08:34:53,233 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. [2022-07-21 08:34:53,284 INFO L132 encePairwiseOnDemand]: 102/114 looper letters, 116 selfloop transitions, 32 changer transitions 0/214 dead transitions. [2022-07-21 08:34:53,285 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 214 transitions, 823 flow [2022-07-21 08:34:53,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-21 08:34:53,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-07-21 08:34:53,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1160 transitions. [2022-07-21 08:34:53,304 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.847953216374269 [2022-07-21 08:34:53,305 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1160 transitions. [2022-07-21 08:34:53,305 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1160 transitions. [2022-07-21 08:34:53,309 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:34:53,311 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1160 transitions. [2022-07-21 08:34:53,318 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) [2022-07-21 08:34:53,327 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) [2022-07-21 08:34:53,328 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) [2022-07-21 08:34:53,330 INFO L186 Difference]: Start difference. First operand has 107 places, 96 transitions, 213 flow. Second operand 12 states and 1160 transitions. [2022-07-21 08:34:53,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 214 transitions, 823 flow [2022-07-21 08:34:53,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 214 transitions, 764 flow, removed 0 selfloop flow, removed 7 redundant places. [2022-07-21 08:34:53,354 INFO L242 Difference]: Finished difference. Result has 119 places, 129 transitions, 416 flow [2022-07-21 08:34:53,356 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} [2022-07-21 08:34:53,359 INFO L279 CegarLoopForPetriNet]: 107 programPoint places, 12 predicate places. [2022-07-21 08:34:53,360 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 129 transitions, 416 flow [2022-07-21 08:34:53,360 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) [2022-07-21 08:34:53,360 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:34:53,361 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] [2022-07-21 08:34:53,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 08:34:53,361 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)] === [2022-07-21 08:34:53,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:34:53,362 INFO L85 PathProgramCache]: Analyzing trace with hash 1738116757, now seen corresponding path program 1 times [2022-07-21 08:34:53,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:34:53,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036084500] [2022-07-21 08:34:53,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:34:53,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:34:53,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:34:53,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:34:53,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:34:53,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036084500] [2022-07-21 08:34:53,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036084500] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:34:53,444 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:34:53,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 08:34:53,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65331533] [2022-07-21 08:34:53,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:34:53,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 08:34:53,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:34:53,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 08:34:53,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 08:34:53,449 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 114 [2022-07-21 08:34:53,449 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) [2022-07-21 08:34:53,450 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:34:53,450 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 114 [2022-07-21 08:34:53,450 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:34:53,751 INFO L129 PetriNetUnfolder]: 398/2267 cut-off events. [2022-07-21 08:34:53,751 INFO L130 PetriNetUnfolder]: For 379/391 co-relation queries the response was YES. [2022-07-21 08:34:53,762 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. [2022-07-21 08:34:53,772 INFO L132 encePairwiseOnDemand]: 108/114 looper letters, 15 selfloop transitions, 4 changer transitions 0/134 dead transitions. [2022-07-21 08:34:53,772 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 134 transitions, 470 flow [2022-07-21 08:34:53,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 08:34:53,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-21 08:34:53,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 314 transitions. [2022-07-21 08:34:53,775 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9181286549707602 [2022-07-21 08:34:53,775 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 314 transitions. [2022-07-21 08:34:53,775 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 314 transitions. [2022-07-21 08:34:53,776 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:34:53,776 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 314 transitions. [2022-07-21 08:34:53,777 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) [2022-07-21 08:34:53,777 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) [2022-07-21 08:34:53,778 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) [2022-07-21 08:34:53,778 INFO L186 Difference]: Start difference. First operand has 119 places, 129 transitions, 416 flow. Second operand 3 states and 314 transitions. [2022-07-21 08:34:53,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 134 transitions, 470 flow [2022-07-21 08:34:53,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 134 transitions, 470 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 08:34:53,794 INFO L242 Difference]: Finished difference. Result has 122 places, 129 transitions, 432 flow [2022-07-21 08:34:53,795 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} [2022-07-21 08:34:53,795 INFO L279 CegarLoopForPetriNet]: 107 programPoint places, 15 predicate places. [2022-07-21 08:34:53,796 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 129 transitions, 432 flow [2022-07-21 08:34:53,796 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) [2022-07-21 08:34:53,796 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:34:53,796 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] [2022-07-21 08:34:53,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 08:34:53,797 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)] === [2022-07-21 08:34:53,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:34:53,797 INFO L85 PathProgramCache]: Analyzing trace with hash 195211785, now seen corresponding path program 2 times [2022-07-21 08:34:53,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:34:53,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866292073] [2022-07-21 08:34:53,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:34:53,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:34:53,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:34:53,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:34:53,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:34:53,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866292073] [2022-07-21 08:34:53,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866292073] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:34:53,898 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:34:53,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 08:34:53,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329684899] [2022-07-21 08:34:53,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:34:53,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 08:34:53,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:34:53,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 08:34:53,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 08:34:53,901 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 114 [2022-07-21 08:34:53,901 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) [2022-07-21 08:34:53,902 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:34:53,902 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 114 [2022-07-21 08:34:53,902 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:34:54,549 INFO L129 PetriNetUnfolder]: 1590/4818 cut-off events. [2022-07-21 08:34:54,550 INFO L130 PetriNetUnfolder]: For 2362/2464 co-relation queries the response was YES. [2022-07-21 08:34:54,576 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. [2022-07-21 08:34:54,598 INFO L132 encePairwiseOnDemand]: 105/114 looper letters, 45 selfloop transitions, 19 changer transitions 4/175 dead transitions. [2022-07-21 08:34:54,599 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 175 transitions, 737 flow [2022-07-21 08:34:54,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 08:34:54,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-21 08:34:54,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 518 transitions. [2022-07-21 08:34:54,602 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9087719298245615 [2022-07-21 08:34:54,603 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 518 transitions. [2022-07-21 08:34:54,603 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 518 transitions. [2022-07-21 08:34:54,604 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:34:54,604 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 518 transitions. [2022-07-21 08:34:54,605 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) [2022-07-21 08:34:54,607 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) [2022-07-21 08:34:54,607 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) [2022-07-21 08:34:54,607 INFO L186 Difference]: Start difference. First operand has 122 places, 129 transitions, 432 flow. Second operand 5 states and 518 transitions. [2022-07-21 08:34:54,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 175 transitions, 737 flow [2022-07-21 08:34:54,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 175 transitions, 717 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-07-21 08:34:54,632 INFO L242 Difference]: Finished difference. Result has 124 places, 143 transitions, 510 flow [2022-07-21 08:34:54,632 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} [2022-07-21 08:34:54,634 INFO L279 CegarLoopForPetriNet]: 107 programPoint places, 17 predicate places. [2022-07-21 08:34:54,635 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 143 transitions, 510 flow [2022-07-21 08:34:54,635 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) [2022-07-21 08:34:54,635 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:34:54,636 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] [2022-07-21 08:34:54,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-21 08:34:54,636 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)] === [2022-07-21 08:34:54,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:34:54,637 INFO L85 PathProgramCache]: Analyzing trace with hash 579299824, now seen corresponding path program 1 times [2022-07-21 08:34:54,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:34:54,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808651442] [2022-07-21 08:34:54,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:34:54,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:34:54,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:34:54,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:34:54,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:34:54,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808651442] [2022-07-21 08:34:54,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808651442] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:34:54,703 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:34:54,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 08:34:54,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289267732] [2022-07-21 08:34:54,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:34:54,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 08:34:54,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:34:54,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 08:34:54,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-21 08:34:54,706 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 114 [2022-07-21 08:34:54,707 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) [2022-07-21 08:34:54,707 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:34:54,708 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 114 [2022-07-21 08:34:54,708 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:34:56,944 INFO L129 PetriNetUnfolder]: 8131/17870 cut-off events. [2022-07-21 08:34:56,945 INFO L130 PetriNetUnfolder]: For 15561/15640 co-relation queries the response was YES. [2022-07-21 08:34:57,047 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. [2022-07-21 08:34:57,146 INFO L132 encePairwiseOnDemand]: 104/114 looper letters, 207 selfloop transitions, 134 changer transitions 25/442 dead transitions. [2022-07-21 08:34:57,147 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 442 transitions, 2686 flow [2022-07-21 08:34:57,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-21 08:34:57,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-07-21 08:34:57,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1151 transitions. [2022-07-21 08:34:57,150 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.841374269005848 [2022-07-21 08:34:57,151 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1151 transitions. [2022-07-21 08:34:57,151 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1151 transitions. [2022-07-21 08:34:57,152 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:34:57,154 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1151 transitions. [2022-07-21 08:34:57,158 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) [2022-07-21 08:34:57,160 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) [2022-07-21 08:34:57,161 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) [2022-07-21 08:34:57,161 INFO L186 Difference]: Start difference. First operand has 124 places, 143 transitions, 510 flow. Second operand 12 states and 1151 transitions. [2022-07-21 08:34:57,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 442 transitions, 2686 flow [2022-07-21 08:34:57,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 442 transitions, 2680 flow, removed 3 selfloop flow, removed 0 redundant places. [2022-07-21 08:34:57,358 INFO L242 Difference]: Finished difference. Result has 143 places, 298 transitions, 1900 flow [2022-07-21 08:34:57,359 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} [2022-07-21 08:34:57,364 INFO L279 CegarLoopForPetriNet]: 107 programPoint places, 36 predicate places. [2022-07-21 08:34:57,364 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 298 transitions, 1900 flow [2022-07-21 08:34:57,365 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) [2022-07-21 08:34:57,365 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:34:57,365 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] [2022-07-21 08:34:57,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-21 08:34:57,366 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)] === [2022-07-21 08:34:57,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:34:57,367 INFO L85 PathProgramCache]: Analyzing trace with hash -1097766141, now seen corresponding path program 1 times [2022-07-21 08:34:57,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:34:57,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677341372] [2022-07-21 08:34:57,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:34:57,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:34:57,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:34:57,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:34:57,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:34:57,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677341372] [2022-07-21 08:34:57,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677341372] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:34:57,461 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:34:57,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 08:34:57,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581193455] [2022-07-21 08:34:57,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:34:57,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 08:34:57,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:34:57,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 08:34:57,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-21 08:34:57,463 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 114 [2022-07-21 08:34:57,464 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) [2022-07-21 08:34:57,464 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:34:57,464 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 114 [2022-07-21 08:34:57,465 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:35:00,171 INFO L129 PetriNetUnfolder]: 9006/19880 cut-off events. [2022-07-21 08:35:00,172 INFO L130 PetriNetUnfolder]: For 29259/29357 co-relation queries the response was YES. [2022-07-21 08:35:00,338 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. [2022-07-21 08:35:00,454 INFO L132 encePairwiseOnDemand]: 104/114 looper letters, 237 selfloop transitions, 206 changer transitions 5/524 dead transitions. [2022-07-21 08:35:00,454 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 524 transitions, 4189 flow [2022-07-21 08:35:00,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-21 08:35:00,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-07-21 08:35:00,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1235 transitions. [2022-07-21 08:35:00,458 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8333333333333334 [2022-07-21 08:35:00,458 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1235 transitions. [2022-07-21 08:35:00,458 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1235 transitions. [2022-07-21 08:35:00,459 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:35:00,459 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1235 transitions. [2022-07-21 08:35:00,461 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) [2022-07-21 08:35:00,464 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) [2022-07-21 08:35:00,465 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) [2022-07-21 08:35:00,465 INFO L186 Difference]: Start difference. First operand has 143 places, 298 transitions, 1900 flow. Second operand 13 states and 1235 transitions. [2022-07-21 08:35:00,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 524 transitions, 4189 flow [2022-07-21 08:35:01,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 524 transitions, 4189 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-21 08:35:01,117 INFO L242 Difference]: Finished difference. Result has 163 places, 386 transitions, 3338 flow [2022-07-21 08:35:01,117 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} [2022-07-21 08:35:01,118 INFO L279 CegarLoopForPetriNet]: 107 programPoint places, 56 predicate places. [2022-07-21 08:35:01,118 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 386 transitions, 3338 flow [2022-07-21 08:35:01,119 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) [2022-07-21 08:35:01,119 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:35:01,119 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] [2022-07-21 08:35:01,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-21 08:35:01,120 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)] === [2022-07-21 08:35:01,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:35:01,121 INFO L85 PathProgramCache]: Analyzing trace with hash -1042275993, now seen corresponding path program 1 times [2022-07-21 08:35:01,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:35:01,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406952508] [2022-07-21 08:35:01,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:35:01,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:35:01,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:35:01,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:35:01,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:35:01,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406952508] [2022-07-21 08:35:01,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406952508] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:35:01,196 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:35:01,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 08:35:01,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998942214] [2022-07-21 08:35:01,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:35:01,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 08:35:01,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:35:01,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 08:35:01,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-21 08:35:01,199 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 114 [2022-07-21 08:35:01,200 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) [2022-07-21 08:35:01,200 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:35:01,200 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 114 [2022-07-21 08:35:01,200 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:35:03,949 INFO L129 PetriNetUnfolder]: 9876/21673 cut-off events. [2022-07-21 08:35:03,949 INFO L130 PetriNetUnfolder]: For 52197/52248 co-relation queries the response was YES. [2022-07-21 08:35:04,137 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. [2022-07-21 08:35:04,254 INFO L132 encePairwiseOnDemand]: 104/114 looper letters, 295 selfloop transitions, 249 changer transitions 8/643 dead transitions. [2022-07-21 08:35:04,255 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 643 transitions, 6329 flow [2022-07-21 08:35:04,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-21 08:35:04,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-07-21 08:35:04,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1239 transitions. [2022-07-21 08:35:04,260 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8360323886639676 [2022-07-21 08:35:04,260 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1239 transitions. [2022-07-21 08:35:04,260 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1239 transitions. [2022-07-21 08:35:04,261 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:35:04,261 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1239 transitions. [2022-07-21 08:35:04,264 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) [2022-07-21 08:35:04,267 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) [2022-07-21 08:35:04,268 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) [2022-07-21 08:35:04,268 INFO L186 Difference]: Start difference. First operand has 163 places, 386 transitions, 3338 flow. Second operand 13 states and 1239 transitions. [2022-07-21 08:35:04,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 643 transitions, 6329 flow [2022-07-21 08:35:05,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 643 transitions, 6261 flow, removed 18 selfloop flow, removed 1 redundant places. [2022-07-21 08:35:05,253 INFO L242 Difference]: Finished difference. Result has 182 places, 484 transitions, 5114 flow [2022-07-21 08:35:05,253 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} [2022-07-21 08:35:05,254 INFO L279 CegarLoopForPetriNet]: 107 programPoint places, 75 predicate places. [2022-07-21 08:35:05,254 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 484 transitions, 5114 flow [2022-07-21 08:35:05,255 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) [2022-07-21 08:35:05,255 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:35:05,255 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] [2022-07-21 08:35:05,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-21 08:35:05,255 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)] === [2022-07-21 08:35:05,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:35:05,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1127280812, now seen corresponding path program 1 times [2022-07-21 08:35:05,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:35:05,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214856805] [2022-07-21 08:35:05,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:35:05,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:35:05,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:35:05,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:35:05,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:35:05,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214856805] [2022-07-21 08:35:05,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214856805] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:35:05,312 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:35:05,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 08:35:05,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765773673] [2022-07-21 08:35:05,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:35:05,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 08:35:05,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:35:05,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 08:35:05,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-21 08:35:05,315 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 114 [2022-07-21 08:35:05,316 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) [2022-07-21 08:35:05,316 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:35:05,316 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 114 [2022-07-21 08:35:05,316 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:35:05,827 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|)]) [2022-07-21 08:35:05,827 INFO L384 tUnfolder$Statistics]: this new event has 79 ancestors and is cut-off event [2022-07-21 08:35:05,827 INFO L387 tUnfolder$Statistics]: existing Event has 79 ancestors and is cut-off event [2022-07-21 08:35:05,827 INFO L387 tUnfolder$Statistics]: existing Event has 79 ancestors and is cut-off event [2022-07-21 08:35:05,827 INFO L387 tUnfolder$Statistics]: existing Event has 79 ancestors and is cut-off event [2022-07-21 08:35:05,856 INFO L129 PetriNetUnfolder]: 947/3465 cut-off events. [2022-07-21 08:35:05,856 INFO L130 PetriNetUnfolder]: For 8687/8759 co-relation queries the response was YES. [2022-07-21 08:35:05,878 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. [2022-07-21 08:35:05,885 INFO L132 encePairwiseOnDemand]: 107/114 looper letters, 40 selfloop transitions, 11 changer transitions 44/281 dead transitions. [2022-07-21 08:35:05,886 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 281 transitions, 2262 flow [2022-07-21 08:35:05,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 08:35:05,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-21 08:35:05,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 522 transitions. [2022-07-21 08:35:05,890 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9157894736842105 [2022-07-21 08:35:05,890 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 522 transitions. [2022-07-21 08:35:05,890 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 522 transitions. [2022-07-21 08:35:05,892 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:35:05,892 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 522 transitions. [2022-07-21 08:35:05,895 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) [2022-07-21 08:35:05,897 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) [2022-07-21 08:35:05,898 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) [2022-07-21 08:35:05,898 INFO L186 Difference]: Start difference. First operand has 182 places, 484 transitions, 5114 flow. Second operand 5 states and 522 transitions. [2022-07-21 08:35:05,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 281 transitions, 2262 flow [2022-07-21 08:35:05,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 281 transitions, 2219 flow, removed 8 selfloop flow, removed 1 redundant places. [2022-07-21 08:35:05,975 INFO L242 Difference]: Finished difference. Result has 185 places, 226 transitions, 1692 flow [2022-07-21 08:35:05,976 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} [2022-07-21 08:35:05,976 INFO L279 CegarLoopForPetriNet]: 107 programPoint places, 78 predicate places. [2022-07-21 08:35:05,977 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 226 transitions, 1692 flow [2022-07-21 08:35:05,977 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) [2022-07-21 08:35:05,977 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:35:05,977 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] [2022-07-21 08:35:05,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-21 08:35:05,978 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)] === [2022-07-21 08:35:05,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:35:05,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1072455534, now seen corresponding path program 1 times [2022-07-21 08:35:05,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:35:05,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225207962] [2022-07-21 08:35:05,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:35:05,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:35:06,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:35:06,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:35:06,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:35:06,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225207962] [2022-07-21 08:35:06,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225207962] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:35:06,095 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:35:06,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 08:35:06,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348641946] [2022-07-21 08:35:06,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:35:06,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 08:35:06,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:35:06,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 08:35:06,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-21 08:35:06,098 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 114 [2022-07-21 08:35:06,099 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) [2022-07-21 08:35:06,099 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:35:06,099 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 114 [2022-07-21 08:35:06,099 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:35:06,580 INFO L129 PetriNetUnfolder]: 879/3214 cut-off events. [2022-07-21 08:35:06,580 INFO L130 PetriNetUnfolder]: For 8924/8988 co-relation queries the response was YES. [2022-07-21 08:35:06,601 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. [2022-07-21 08:35:06,608 INFO L132 encePairwiseOnDemand]: 106/114 looper letters, 55 selfloop transitions, 17 changer transitions 37/283 dead transitions. [2022-07-21 08:35:06,608 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 283 transitions, 2246 flow [2022-07-21 08:35:06,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-21 08:35:06,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-21 08:35:06,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 803 transitions. [2022-07-21 08:35:06,613 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8804824561403509 [2022-07-21 08:35:06,613 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 803 transitions. [2022-07-21 08:35:06,613 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 803 transitions. [2022-07-21 08:35:06,614 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:35:06,614 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 803 transitions. [2022-07-21 08:35:06,617 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) [2022-07-21 08:35:06,619 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) [2022-07-21 08:35:06,619 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) [2022-07-21 08:35:06,619 INFO L186 Difference]: Start difference. First operand has 185 places, 226 transitions, 1692 flow. Second operand 8 states and 803 transitions. [2022-07-21 08:35:06,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 283 transitions, 2246 flow [2022-07-21 08:35:06,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 283 transitions, 2191 flow, removed 6 selfloop flow, removed 4 redundant places. [2022-07-21 08:35:06,679 INFO L242 Difference]: Finished difference. Result has 189 places, 226 transitions, 1707 flow [2022-07-21 08:35:06,679 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} [2022-07-21 08:35:06,680 INFO L279 CegarLoopForPetriNet]: 107 programPoint places, 82 predicate places. [2022-07-21 08:35:06,680 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 226 transitions, 1707 flow [2022-07-21 08:35:06,681 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) [2022-07-21 08:35:06,681 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:35:06,681 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] [2022-07-21 08:35:06,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-21 08:35:06,681 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)] === [2022-07-21 08:35:06,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:35:06,682 INFO L85 PathProgramCache]: Analyzing trace with hash -143796270, now seen corresponding path program 2 times [2022-07-21 08:35:06,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:35:06,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243269370] [2022-07-21 08:35:06,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:35:06,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:35:06,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:35:06,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:35:06,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:35:06,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243269370] [2022-07-21 08:35:06,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243269370] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:35:06,776 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:35:06,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 08:35:06,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646931967] [2022-07-21 08:35:06,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:35:06,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 08:35:06,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:35:06,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 08:35:06,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-21 08:35:06,779 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 114 [2022-07-21 08:35:06,781 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) [2022-07-21 08:35:06,781 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:35:06,781 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 114 [2022-07-21 08:35:06,781 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:35:07,208 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|)]) [2022-07-21 08:35:07,209 INFO L384 tUnfolder$Statistics]: this new event has 74 ancestors and is cut-off event [2022-07-21 08:35:07,209 INFO L387 tUnfolder$Statistics]: existing Event has 74 ancestors and is cut-off event [2022-07-21 08:35:07,209 INFO L387 tUnfolder$Statistics]: existing Event has 74 ancestors and is cut-off event [2022-07-21 08:35:07,209 INFO L387 tUnfolder$Statistics]: existing Event has 74 ancestors and is cut-off event [2022-07-21 08:35:07,245 INFO L129 PetriNetUnfolder]: 672/2660 cut-off events. [2022-07-21 08:35:07,245 INFO L130 PetriNetUnfolder]: For 7007/7077 co-relation queries the response was YES. [2022-07-21 08:35:07,262 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. [2022-07-21 08:35:07,267 INFO L132 encePairwiseOnDemand]: 106/114 looper letters, 51 selfloop transitions, 14 changer transitions 23/244 dead transitions. [2022-07-21 08:35:07,267 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 244 transitions, 1889 flow [2022-07-21 08:35:07,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 08:35:07,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-21 08:35:07,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 699 transitions. [2022-07-21 08:35:07,269 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8759398496240601 [2022-07-21 08:35:07,269 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 699 transitions. [2022-07-21 08:35:07,269 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 699 transitions. [2022-07-21 08:35:07,270 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:35:07,270 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 699 transitions. [2022-07-21 08:35:07,271 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) [2022-07-21 08:35:07,273 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) [2022-07-21 08:35:07,273 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) [2022-07-21 08:35:07,273 INFO L186 Difference]: Start difference. First operand has 189 places, 226 transitions, 1707 flow. Second operand 7 states and 699 transitions. [2022-07-21 08:35:07,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 244 transitions, 1889 flow [2022-07-21 08:35:07,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 244 transitions, 1830 flow, removed 1 selfloop flow, removed 3 redundant places. [2022-07-21 08:35:07,312 INFO L242 Difference]: Finished difference. Result has 192 places, 203 transitions, 1418 flow [2022-07-21 08:35:07,312 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} [2022-07-21 08:35:07,313 INFO L279 CegarLoopForPetriNet]: 107 programPoint places, 85 predicate places. [2022-07-21 08:35:07,313 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 203 transitions, 1418 flow [2022-07-21 08:35:07,313 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) [2022-07-21 08:35:07,313 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:35:07,314 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] [2022-07-21 08:35:07,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-21 08:35:07,314 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)] === [2022-07-21 08:35:07,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:35:07,314 INFO L85 PathProgramCache]: Analyzing trace with hash 571210246, now seen corresponding path program 3 times [2022-07-21 08:35:07,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:35:07,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676410621] [2022-07-21 08:35:07,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:35:07,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:35:07,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:35:07,332 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 08:35:07,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 08:35:07,369 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 08:35:07,369 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 08:35:07,370 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location readerErr0ASSERT_VIOLATIONERROR_FUNCTION (6 of 7 remaining) [2022-07-21 08:35:07,372 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location readerErr0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2022-07-21 08:35:07,372 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 7 remaining) [2022-07-21 08:35:07,372 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 7 remaining) [2022-07-21 08:35:07,372 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 7 remaining) [2022-07-21 08:35:07,373 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 7 remaining) [2022-07-21 08:35:07,373 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location readerErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2022-07-21 08:35:07,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-21 08:35:07,373 INFO L356 BasicCegarLoop]: Path program histogram: [3, 2, 1, 1, 1, 1, 1] [2022-07-21 08:35:07,379 INFO L226 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-07-21 08:35:07,379 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-21 08:35:07,435 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 08:35:07 BasicIcfg [2022-07-21 08:35:07,435 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-21 08:35:07,435 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-21 08:35:07,436 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-21 08:35:07,436 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-21 08:35:07,436 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:34:51" (3/4) ... [2022-07-21 08:35:07,438 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-07-21 08:35:07,526 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2022-07-21 08:35:07,526 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-21 08:35:07,527 INFO L158 Benchmark]: Toolchain (without parser) took 17454.53ms. Allocated memory was 58.7MB in the beginning and 3.6GB in the end (delta: 3.5GB). Free memory was 41.4MB in the beginning and 1.3GB in the end (delta: -1.2GB). Peak memory consumption was 2.3GB. Max. memory is 16.1GB. [2022-07-21 08:35:07,527 INFO L158 Benchmark]: CDTParser took 0.30ms. Allocated memory is still 46.1MB. Free memory was 27.9MB in the beginning and 27.8MB in the end (delta: 43.7kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-21 08:35:07,528 INFO L158 Benchmark]: CACSL2BoogieTranslator took 448.91ms. Allocated memory is still 58.7MB. Free memory was 41.3MB in the beginning and 32.0MB in the end (delta: 9.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-07-21 08:35:07,528 INFO L158 Benchmark]: Boogie Procedure Inliner took 65.52ms. Allocated memory is still 58.7MB. Free memory was 31.8MB in the beginning and 29.7MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-21 08:35:07,528 INFO L158 Benchmark]: Boogie Preprocessor took 47.76ms. Allocated memory is still 58.7MB. Free memory was 29.7MB in the beginning and 28.4MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-21 08:35:07,529 INFO L158 Benchmark]: RCFGBuilder took 470.27ms. Allocated memory is still 58.7MB. Free memory was 41.8MB in the beginning and 27.7MB in the end (delta: 14.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-07-21 08:35:07,529 INFO L158 Benchmark]: TraceAbstraction took 16306.35ms. Allocated memory was 58.7MB in the beginning and 3.6GB in the end (delta: 3.5GB). Free memory was 40.0MB in the beginning and 1.3GB in the end (delta: -1.2GB). Peak memory consumption was 2.3GB. Max. memory is 16.1GB. [2022-07-21 08:35:07,529 INFO L158 Benchmark]: Witness Printer took 90.99ms. Allocated memory is still 3.6GB. Free memory was 1.3GB in the beginning and 1.3GB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-07-21 08:35:07,531 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30ms. Allocated memory is still 46.1MB. Free memory was 27.9MB in the beginning and 27.8MB in the end (delta: 43.7kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 448.91ms. Allocated memory is still 58.7MB. Free memory was 41.3MB in the beginning and 32.0MB in the end (delta: 9.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 65.52ms. Allocated memory is still 58.7MB. Free memory was 31.8MB in the beginning and 29.7MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 47.76ms. Allocated memory is still 58.7MB. Free memory was 29.7MB in the beginning and 28.4MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 470.27ms. Allocated memory is still 58.7MB. Free memory was 41.8MB in the beginning and 27.7MB in the end (delta: 14.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 16306.35ms. Allocated memory was 58.7MB in the beginning and 3.6GB in the end (delta: 3.5GB). Free memory was 40.0MB in the beginning and 1.3GB in the end (delta: -1.2GB). Peak memory consumption was 2.3GB. Max. memory is 16.1GB. * Witness Printer took 90.99ms. Allocated memory is still 3.6GB. Free memory was 1.3GB in the beginning and 1.3GB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. 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: 16.1s, OverallIterations: 10, TraceHistogramMax: 1, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 14.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 600 SdHoareTripleChecker+Valid, 1.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 600 mSDsluCounter, 391 SdHoareTripleChecker+Invalid, 0.8s 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: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.5s 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! [2022-07-21 08:35:07,572 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE