./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-atomic/read_write_lock-2.i --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d 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 ../../../trunk/examples/svcomp/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 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 16:23:32,391 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 16:23:32,392 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 16:23:32,423 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 16:23:32,425 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 16:23:32,427 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 16:23:32,428 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 16:23:32,430 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 16:23:32,432 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 16:23:32,435 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 16:23:32,435 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 16:23:32,437 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 16:23:32,437 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 16:23:32,439 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 16:23:32,440 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 16:23:32,443 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 16:23:32,444 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 16:23:32,445 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 16:23:32,447 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 16:23:32,451 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 16:23:32,456 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 16:23:32,457 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 16:23:32,458 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 16:23:32,458 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 16:23:32,463 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 16:23:32,463 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 16:23:32,463 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 16:23:32,465 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 16:23:32,465 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 16:23:32,466 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 16:23:32,466 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 16:23:32,469 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 16:23:32,470 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 16:23:32,471 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 16:23:32,472 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 16:23:32,472 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 16:23:32,473 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 16:23:32,473 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 16:23:32,473 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 16:23:32,474 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 16:23:32,474 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 16:23:32,475 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 16:23:32,500 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 16:23:32,501 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 16:23:32,502 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 16:23:32,502 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 16:23:32,502 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 16:23:32,502 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 16:23:32,503 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 16:23:32,503 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 16:23:32,503 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 16:23:32,503 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 16:23:32,504 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 16:23:32,504 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 16:23:32,504 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 16:23:32,504 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 16:23:32,504 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 16:23:32,505 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 16:23:32,505 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 16:23:32,505 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 16:23:32,505 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 16:23:32,505 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 16:23:32,505 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 16:23:32,506 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 16:23:32,506 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 16:23:32,506 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 16:23:32,506 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 16:23:32,506 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 16:23:32,506 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 16:23:32,507 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 16:23:32,507 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 16:23:32,507 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 16:23:32,507 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 16:23:32,507 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 16:23:32,507 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 16:23:32,507 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 16:23:32,508 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 16:23:32,508 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3e2f466b16db44ce2fec1aabf9e70b4ab734ef2801c32e66d10c5bcbcceb5301 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 16:23:32,715 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 16:23:32,748 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 16:23:32,749 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 16:23:32,750 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 16:23:32,750 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 16:23:32,751 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-atomic/read_write_lock-2.i [2023-08-30 16:23:33,669 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 16:23:33,856 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 16:23:33,856 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-atomic/read_write_lock-2.i [2023-08-30 16:23:33,864 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2c4f9dd6c/eb30d936890342cb872a6c16bb606b1c/FLAGea6f94fd8 [2023-08-30 16:23:33,873 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2c4f9dd6c/eb30d936890342cb872a6c16bb606b1c [2023-08-30 16:23:33,874 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 16:23:33,875 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 16:23:33,876 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 16:23:33,876 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 16:23:33,883 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 16:23:33,883 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:23:33" (1/1) ... [2023-08-30 16:23:33,884 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5dd61903 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:23:33, skipping insertion in model container [2023-08-30 16:23:33,884 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:23:33" (1/1) ... [2023-08-30 16:23:33,888 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 16:23:33,915 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 16:23:34,023 WARN L633 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-08-30 16:23:34,114 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-atomic/read_write_lock-2.i[31244,31257] [2023-08-30 16:23:34,124 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 16:23:34,132 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 16:23:34,150 WARN L633 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-08-30 16:23:34,164 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-atomic/read_write_lock-2.i[31244,31257] [2023-08-30 16:23:34,173 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 16:23:34,206 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 16:23:34,207 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 16:23:34,207 WARN L667 CHandler]: The function __builtin_bswap16 is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 16:23:34,211 INFO L208 MainTranslator]: Completed translation [2023-08-30 16:23:34,212 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:23:34 WrapperNode [2023-08-30 16:23:34,212 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 16:23:34,213 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 16:23:34,213 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 16:23:34,213 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 16:23:34,218 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:23:34" (1/1) ... [2023-08-30 16:23:34,242 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:23:34" (1/1) ... [2023-08-30 16:23:34,256 INFO L138 Inliner]: procedures = 174, calls = 51, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 119 [2023-08-30 16:23:34,258 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 16:23:34,259 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 16:23:34,259 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 16:23:34,259 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 16:23:34,265 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:23:34" (1/1) ... [2023-08-30 16:23:34,265 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:23:34" (1/1) ... [2023-08-30 16:23:34,275 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:23:34" (1/1) ... [2023-08-30 16:23:34,275 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:23:34" (1/1) ... [2023-08-30 16:23:34,279 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:23:34" (1/1) ... [2023-08-30 16:23:34,291 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:23:34" (1/1) ... [2023-08-30 16:23:34,292 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:23:34" (1/1) ... [2023-08-30 16:23:34,293 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:23:34" (1/1) ... [2023-08-30 16:23:34,294 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 16:23:34,295 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 16:23:34,300 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 16:23:34,300 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 16:23:34,300 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:23:34" (1/1) ... [2023-08-30 16:23:34,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 16:23:34,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 16:23:34,322 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) [2023-08-30 16:23:34,326 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 [2023-08-30 16:23:34,352 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 16:23:34,352 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 16:23:34,352 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 16:23:34,352 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 16:23:34,352 INFO L130 BoogieDeclarations]: Found specification of procedure reader [2023-08-30 16:23:34,352 INFO L138 BoogieDeclarations]: Found implementation of procedure reader [2023-08-30 16:23:34,352 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 16:23:34,352 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 16:23:34,352 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 16:23:34,352 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 16:23:34,352 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 16:23:34,352 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 16:23:34,353 INFO L130 BoogieDeclarations]: Found specification of procedure writer [2023-08-30 16:23:34,353 INFO L138 BoogieDeclarations]: Found implementation of procedure writer [2023-08-30 16:23:34,354 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 16:23:34,436 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 16:23:34,437 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 16:23:34,609 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 16:23:34,630 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 16:23:34,630 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-08-30 16:23:34,632 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:23:34 BoogieIcfgContainer [2023-08-30 16:23:34,632 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 16:23:34,633 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 16:23:34,633 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 16:23:34,635 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 16:23:34,636 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 04:23:33" (1/3) ... [2023-08-30 16:23:34,636 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b6aabda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 04:23:34, skipping insertion in model container [2023-08-30 16:23:34,636 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:23:34" (2/3) ... [2023-08-30 16:23:34,636 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b6aabda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 04:23:34, skipping insertion in model container [2023-08-30 16:23:34,636 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:23:34" (3/3) ... [2023-08-30 16:23:34,637 INFO L112 eAbstractionObserver]: Analyzing ICFG read_write_lock-2.i [2023-08-30 16:23:34,642 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 16:23:34,648 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 16:23:34,648 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-30 16:23:34,649 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 16:23:34,694 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-30 16:23:34,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 121 places, 110 transitions, 252 flow [2023-08-30 16:23:34,745 INFO L130 PetriNetUnfolder]: 2/106 cut-off events. [2023-08-30 16:23:34,745 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-30 16:23:34,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123 conditions, 106 events. 2/106 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 96 event pairs, 0 based on Foata normal form. 0/102 useless extension candidates. Maximal degree in co-relation 71. Up to 2 conditions per place. [2023-08-30 16:23:34,749 INFO L82 GeneralOperation]: Start removeDead. Operand has 121 places, 110 transitions, 252 flow [2023-08-30 16:23:34,751 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 104 places, 93 transitions, 207 flow [2023-08-30 16:23:34,753 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 16:23:34,776 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 104 places, 93 transitions, 207 flow [2023-08-30 16:23:34,781 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 104 places, 93 transitions, 207 flow [2023-08-30 16:23:34,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 104 places, 93 transitions, 207 flow [2023-08-30 16:23:34,804 INFO L130 PetriNetUnfolder]: 2/93 cut-off events. [2023-08-30 16:23:34,804 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 16:23:34,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109 conditions, 93 events. 2/93 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 96 event pairs, 0 based on Foata normal form. 0/89 useless extension candidates. Maximal degree in co-relation 71. Up to 2 conditions per place. [2023-08-30 16:23:34,807 INFO L119 LiptonReduction]: Number of co-enabled transitions 2574 [2023-08-30 16:23:36,836 INFO L134 LiptonReduction]: Checked pairs total: 8742 [2023-08-30 16:23:36,836 INFO L136 LiptonReduction]: Total number of compositions: 62 [2023-08-30 16:23:36,845 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 16:23:36,852 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=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@454c5894, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 16:23:36,853 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-08-30 16:23:36,859 INFO L130 PetriNetUnfolder]: 0/18 cut-off events. [2023-08-30 16:23:36,860 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 16:23:36,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:23:36,861 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:23:36,861 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)] === [2023-08-30 16:23:36,865 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:23:36,865 INFO L85 PathProgramCache]: Analyzing trace with hash -71968847, now seen corresponding path program 1 times [2023-08-30 16:23:36,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:23:36,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966736172] [2023-08-30 16:23:36,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:23:36,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:23:36,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:23:37,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:23:37,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:23:37,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966736172] [2023-08-30 16:23:37,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966736172] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:23:37,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:23:37,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 16:23:37,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546430534] [2023-08-30 16:23:37,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:23:37,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 16:23:37,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:23:37,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 16:23:37,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 16:23:37,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 172 [2023-08-30 16:23:37,246 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 37 transitions, 95 flow. Second operand has 5 states, 5 states have (on average 87.8) internal successors, (439), 5 states have internal predecessors, (439), 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) [2023-08-30 16:23:37,246 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:23:37,246 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 172 [2023-08-30 16:23:37,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:23:38,337 INFO L130 PetriNetUnfolder]: 11095/16828 cut-off events. [2023-08-30 16:23:38,338 INFO L131 PetriNetUnfolder]: For 1528/1528 co-relation queries the response was YES. [2023-08-30 16:23:38,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33348 conditions, 16828 events. 11095/16828 cut-off events. For 1528/1528 co-relation queries the response was YES. Maximal size of possible extension queue 819. Compared 110772 event pairs, 1883 based on Foata normal form. 440/16468 useless extension candidates. Maximal degree in co-relation 26348. Up to 7825 conditions per place. [2023-08-30 16:23:38,415 INFO L137 encePairwiseOnDemand]: 163/172 looper letters, 132 selfloop transitions, 26 changer transitions 4/166 dead transitions. [2023-08-30 16:23:38,415 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 166 transitions, 740 flow [2023-08-30 16:23:38,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 16:23:38,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 16:23:38,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 938 transitions. [2023-08-30 16:23:38,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6059431524547804 [2023-08-30 16:23:38,426 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 938 transitions. [2023-08-30 16:23:38,427 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 938 transitions. [2023-08-30 16:23:38,428 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:23:38,430 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 938 transitions. [2023-08-30 16:23:38,433 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 104.22222222222223) internal successors, (938), 9 states have internal predecessors, (938), 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) [2023-08-30 16:23:38,437 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 172.0) internal successors, (1720), 10 states have internal predecessors, (1720), 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) [2023-08-30 16:23:38,438 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 172.0) internal successors, (1720), 10 states have internal predecessors, (1720), 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) [2023-08-30 16:23:38,439 INFO L175 Difference]: Start difference. First operand has 50 places, 37 transitions, 95 flow. Second operand 9 states and 938 transitions. [2023-08-30 16:23:38,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 166 transitions, 740 flow [2023-08-30 16:23:38,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 166 transitions, 690 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-08-30 16:23:38,452 INFO L231 Difference]: Finished difference. Result has 55 places, 62 transitions, 223 flow [2023-08-30 16:23:38,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=223, PETRI_PLACES=55, PETRI_TRANSITIONS=62} [2023-08-30 16:23:38,455 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 5 predicate places. [2023-08-30 16:23:38,455 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 62 transitions, 223 flow [2023-08-30 16:23:38,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 87.8) internal successors, (439), 5 states have internal predecessors, (439), 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) [2023-08-30 16:23:38,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:23:38,456 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:23:38,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 16:23:38,457 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)] === [2023-08-30 16:23:38,457 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:23:38,457 INFO L85 PathProgramCache]: Analyzing trace with hash 993862366, now seen corresponding path program 1 times [2023-08-30 16:23:38,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:23:38,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678236060] [2023-08-30 16:23:38,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:23:38,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:23:38,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:23:38,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:23:38,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:23:38,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678236060] [2023-08-30 16:23:38,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678236060] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:23:38,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:23:38,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 16:23:38,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058244700] [2023-08-30 16:23:38,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:23:38,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 16:23:38,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:23:38,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 16:23:38,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 16:23:38,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 172 [2023-08-30 16:23:38,519 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 62 transitions, 223 flow. Second operand has 3 states, 3 states have (on average 95.33333333333333) internal successors, (286), 3 states have internal predecessors, (286), 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) [2023-08-30 16:23:38,519 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:23:38,519 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 172 [2023-08-30 16:23:38,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:23:39,002 INFO L130 PetriNetUnfolder]: 4668/7927 cut-off events. [2023-08-30 16:23:39,003 INFO L131 PetriNetUnfolder]: For 2413/2672 co-relation queries the response was YES. [2023-08-30 16:23:39,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17959 conditions, 7927 events. 4668/7927 cut-off events. For 2413/2672 co-relation queries the response was YES. Maximal size of possible extension queue 593. Compared 59509 event pairs, 1461 based on Foata normal form. 893/7913 useless extension candidates. Maximal degree in co-relation 13414. Up to 3478 conditions per place. [2023-08-30 16:23:39,042 INFO L137 encePairwiseOnDemand]: 166/172 looper letters, 46 selfloop transitions, 4 changer transitions 0/82 dead transitions. [2023-08-30 16:23:39,043 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 82 transitions, 384 flow [2023-08-30 16:23:39,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 16:23:39,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 16:23:39,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 327 transitions. [2023-08-30 16:23:39,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6337209302325582 [2023-08-30 16:23:39,044 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 327 transitions. [2023-08-30 16:23:39,045 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 327 transitions. [2023-08-30 16:23:39,045 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:23:39,045 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 327 transitions. [2023-08-30 16:23:39,046 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 109.0) internal successors, (327), 3 states have internal predecessors, (327), 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) [2023-08-30 16:23:39,047 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 172.0) internal successors, (688), 4 states have internal predecessors, (688), 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) [2023-08-30 16:23:39,047 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 172.0) internal successors, (688), 4 states have internal predecessors, (688), 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) [2023-08-30 16:23:39,047 INFO L175 Difference]: Start difference. First operand has 55 places, 62 transitions, 223 flow. Second operand 3 states and 327 transitions. [2023-08-30 16:23:39,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 82 transitions, 384 flow [2023-08-30 16:23:39,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 82 transitions, 384 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-30 16:23:39,061 INFO L231 Difference]: Finished difference. Result has 58 places, 62 transitions, 239 flow [2023-08-30 16:23:39,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=223, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=239, PETRI_PLACES=58, PETRI_TRANSITIONS=62} [2023-08-30 16:23:39,063 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 8 predicate places. [2023-08-30 16:23:39,063 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 62 transitions, 239 flow [2023-08-30 16:23:39,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 95.33333333333333) internal successors, (286), 3 states have internal predecessors, (286), 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) [2023-08-30 16:23:39,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:23:39,064 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:23:39,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 16:23:39,064 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)] === [2023-08-30 16:23:39,066 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:23:39,066 INFO L85 PathProgramCache]: Analyzing trace with hash 1474564512, now seen corresponding path program 2 times [2023-08-30 16:23:39,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:23:39,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927826098] [2023-08-30 16:23:39,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:23:39,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:23:39,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:23:39,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:23:39,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:23:39,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927826098] [2023-08-30 16:23:39,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927826098] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:23:39,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:23:39,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 16:23:39,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89771297] [2023-08-30 16:23:39,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:23:39,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 16:23:39,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:23:39,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 16:23:39,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 16:23:39,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 172 [2023-08-30 16:23:39,181 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 62 transitions, 239 flow. Second operand has 4 states, 4 states have (on average 94.75) internal successors, (379), 4 states have internal predecessors, (379), 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) [2023-08-30 16:23:39,181 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:23:39,181 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 172 [2023-08-30 16:23:39,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:23:39,492 INFO L130 PetriNetUnfolder]: 1766/3702 cut-off events. [2023-08-30 16:23:39,492 INFO L131 PetriNetUnfolder]: For 2875/2954 co-relation queries the response was YES. [2023-08-30 16:23:39,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8958 conditions, 3702 events. 1766/3702 cut-off events. For 2875/2954 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 29737 event pairs, 430 based on Foata normal form. 367/3682 useless extension candidates. Maximal degree in co-relation 7699. Up to 1188 conditions per place. [2023-08-30 16:23:39,503 INFO L137 encePairwiseOnDemand]: 165/172 looper letters, 55 selfloop transitions, 7 changer transitions 14/108 dead transitions. [2023-08-30 16:23:39,503 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 108 transitions, 541 flow [2023-08-30 16:23:39,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 16:23:39,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 16:23:39,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 443 transitions. [2023-08-30 16:23:39,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6438953488372093 [2023-08-30 16:23:39,505 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 443 transitions. [2023-08-30 16:23:39,505 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 443 transitions. [2023-08-30 16:23:39,505 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:23:39,505 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 443 transitions. [2023-08-30 16:23:39,506 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 110.75) internal successors, (443), 4 states have internal predecessors, (443), 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) [2023-08-30 16:23:39,507 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 172.0) internal successors, (860), 5 states have internal predecessors, (860), 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) [2023-08-30 16:23:39,508 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 172.0) internal successors, (860), 5 states have internal predecessors, (860), 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) [2023-08-30 16:23:39,508 INFO L175 Difference]: Start difference. First operand has 58 places, 62 transitions, 239 flow. Second operand 4 states and 443 transitions. [2023-08-30 16:23:39,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 108 transitions, 541 flow [2023-08-30 16:23:39,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 108 transitions, 525 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-30 16:23:39,513 INFO L231 Difference]: Finished difference. Result has 62 places, 65 transitions, 281 flow [2023-08-30 16:23:39,513 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=231, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=281, PETRI_PLACES=62, PETRI_TRANSITIONS=65} [2023-08-30 16:23:39,514 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 12 predicate places. [2023-08-30 16:23:39,514 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 65 transitions, 281 flow [2023-08-30 16:23:39,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 94.75) internal successors, (379), 4 states have internal predecessors, (379), 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) [2023-08-30 16:23:39,514 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:23:39,515 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:23:39,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 16:23:39,515 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)] === [2023-08-30 16:23:39,515 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:23:39,515 INFO L85 PathProgramCache]: Analyzing trace with hash -941351057, now seen corresponding path program 1 times [2023-08-30 16:23:39,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:23:39,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686852407] [2023-08-30 16:23:39,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:23:39,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:23:39,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:23:39,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:23:39,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:23:39,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686852407] [2023-08-30 16:23:39,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686852407] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:23:39,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:23:39,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 16:23:39,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030213530] [2023-08-30 16:23:39,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:23:39,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 16:23:39,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:23:39,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 16:23:39,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 16:23:39,583 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 172 [2023-08-30 16:23:39,585 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 65 transitions, 281 flow. Second operand has 5 states, 5 states have (on average 88.6) internal successors, (443), 5 states have internal predecessors, (443), 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) [2023-08-30 16:23:39,586 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:23:39,586 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 172 [2023-08-30 16:23:39,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:23:40,084 INFO L130 PetriNetUnfolder]: 3190/5891 cut-off events. [2023-08-30 16:23:40,085 INFO L131 PetriNetUnfolder]: For 5472/5628 co-relation queries the response was YES. [2023-08-30 16:23:40,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16428 conditions, 5891 events. 3190/5891 cut-off events. For 5472/5628 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 42008 event pairs, 465 based on Foata normal form. 156/5921 useless extension candidates. Maximal degree in co-relation 14805. Up to 2100 conditions per place. [2023-08-30 16:23:40,104 INFO L137 encePairwiseOnDemand]: 162/172 looper letters, 133 selfloop transitions, 43 changer transitions 36/217 dead transitions. [2023-08-30 16:23:40,105 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 217 transitions, 1342 flow [2023-08-30 16:23:40,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 16:23:40,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 16:23:40,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 936 transitions. [2023-08-30 16:23:40,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6046511627906976 [2023-08-30 16:23:40,110 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 936 transitions. [2023-08-30 16:23:40,110 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 936 transitions. [2023-08-30 16:23:40,110 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:23:40,110 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 936 transitions. [2023-08-30 16:23:40,112 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 104.0) internal successors, (936), 9 states have internal predecessors, (936), 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) [2023-08-30 16:23:40,114 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 172.0) internal successors, (1720), 10 states have internal predecessors, (1720), 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) [2023-08-30 16:23:40,115 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 172.0) internal successors, (1720), 10 states have internal predecessors, (1720), 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) [2023-08-30 16:23:40,115 INFO L175 Difference]: Start difference. First operand has 62 places, 65 transitions, 281 flow. Second operand 9 states and 936 transitions. [2023-08-30 16:23:40,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 217 transitions, 1342 flow [2023-08-30 16:23:40,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 217 transitions, 1326 flow, removed 8 selfloop flow, removed 0 redundant places. [2023-08-30 16:23:40,127 INFO L231 Difference]: Finished difference. Result has 77 places, 97 transitions, 620 flow [2023-08-30 16:23:40,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=277, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=620, PETRI_PLACES=77, PETRI_TRANSITIONS=97} [2023-08-30 16:23:40,128 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 27 predicate places. [2023-08-30 16:23:40,128 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 97 transitions, 620 flow [2023-08-30 16:23:40,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 88.6) internal successors, (443), 5 states have internal predecessors, (443), 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) [2023-08-30 16:23:40,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:23:40,128 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:23:40,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 16:23:40,129 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)] === [2023-08-30 16:23:40,129 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:23:40,129 INFO L85 PathProgramCache]: Analyzing trace with hash -671571630, now seen corresponding path program 1 times [2023-08-30 16:23:40,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:23:40,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217742442] [2023-08-30 16:23:40,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:23:40,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:23:40,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:23:40,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:23:40,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:23:40,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217742442] [2023-08-30 16:23:40,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217742442] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:23:40,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:23:40,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 16:23:40,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794384495] [2023-08-30 16:23:40,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:23:40,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 16:23:40,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:23:40,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 16:23:40,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 16:23:40,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 172 [2023-08-30 16:23:40,199 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 97 transitions, 620 flow. Second operand has 5 states, 5 states have (on average 89.0) internal successors, (445), 5 states have internal predecessors, (445), 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) [2023-08-30 16:23:40,199 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:23:40,199 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 172 [2023-08-30 16:23:40,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:23:40,640 INFO L130 PetriNetUnfolder]: 2901/5550 cut-off events. [2023-08-30 16:23:40,640 INFO L131 PetriNetUnfolder]: For 9076/9164 co-relation queries the response was YES. [2023-08-30 16:23:40,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18593 conditions, 5550 events. 2901/5550 cut-off events. For 9076/9164 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 40475 event pairs, 624 based on Foata normal form. 146/5665 useless extension candidates. Maximal degree in co-relation 17587. Up to 2486 conditions per place. [2023-08-30 16:23:40,661 INFO L137 encePairwiseOnDemand]: 163/172 looper letters, 120 selfloop transitions, 46 changer transitions 20/191 dead transitions. [2023-08-30 16:23:40,662 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 191 transitions, 1416 flow [2023-08-30 16:23:40,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 16:23:40,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 16:23:40,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 735 transitions. [2023-08-30 16:23:40,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6104651162790697 [2023-08-30 16:23:40,664 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 735 transitions. [2023-08-30 16:23:40,664 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 735 transitions. [2023-08-30 16:23:40,664 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:23:40,664 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 735 transitions. [2023-08-30 16:23:40,667 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 105.0) internal successors, (735), 7 states have internal predecessors, (735), 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) [2023-08-30 16:23:40,668 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 172.0) internal successors, (1376), 8 states have internal predecessors, (1376), 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) [2023-08-30 16:23:40,668 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 172.0) internal successors, (1376), 8 states have internal predecessors, (1376), 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) [2023-08-30 16:23:40,668 INFO L175 Difference]: Start difference. First operand has 77 places, 97 transitions, 620 flow. Second operand 7 states and 735 transitions. [2023-08-30 16:23:40,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 191 transitions, 1416 flow [2023-08-30 16:23:40,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 191 transitions, 1414 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-30 16:23:40,697 INFO L231 Difference]: Finished difference. Result has 85 places, 106 transitions, 790 flow [2023-08-30 16:23:40,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=618, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=790, PETRI_PLACES=85, PETRI_TRANSITIONS=106} [2023-08-30 16:23:40,699 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 35 predicate places. [2023-08-30 16:23:40,699 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 106 transitions, 790 flow [2023-08-30 16:23:40,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 89.0) internal successors, (445), 5 states have internal predecessors, (445), 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) [2023-08-30 16:23:40,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:23:40,699 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:23:40,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 16:23:40,700 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)] === [2023-08-30 16:23:40,700 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:23:40,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1009867708, now seen corresponding path program 1 times [2023-08-30 16:23:40,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:23:40,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073488118] [2023-08-30 16:23:40,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:23:40,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:23:40,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 16:23:40,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 16:23:40,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 16:23:40,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073488118] [2023-08-30 16:23:40,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073488118] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 16:23:40,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 16:23:40,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 16:23:40,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000439914] [2023-08-30 16:23:40,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 16:23:40,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 16:23:40,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 16:23:40,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 16:23:40,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 16:23:40,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 172 [2023-08-30 16:23:40,777 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 106 transitions, 790 flow. Second operand has 5 states, 5 states have (on average 89.0) internal successors, (445), 5 states have internal predecessors, (445), 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) [2023-08-30 16:23:40,777 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 16:23:40,778 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 172 [2023-08-30 16:23:40,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 16:23:41,246 INFO L130 PetriNetUnfolder]: 2518/5053 cut-off events. [2023-08-30 16:23:41,246 INFO L131 PetriNetUnfolder]: For 10689/10808 co-relation queries the response was YES. [2023-08-30 16:23:41,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17727 conditions, 5053 events. 2518/5053 cut-off events. For 10689/10808 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 37771 event pairs, 500 based on Foata normal form. 169/5161 useless extension candidates. Maximal degree in co-relation 16848. Up to 2139 conditions per place. [2023-08-30 16:23:41,271 INFO L137 encePairwiseOnDemand]: 162/172 looper letters, 124 selfloop transitions, 53 changer transitions 27/214 dead transitions. [2023-08-30 16:23:41,272 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 214 transitions, 1709 flow [2023-08-30 16:23:41,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 16:23:41,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 16:23:41,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 922 transitions. [2023-08-30 16:23:41,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5956072351421189 [2023-08-30 16:23:41,274 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 922 transitions. [2023-08-30 16:23:41,274 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 922 transitions. [2023-08-30 16:23:41,275 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 16:23:41,275 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 922 transitions. [2023-08-30 16:23:41,276 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 102.44444444444444) internal successors, (922), 9 states have internal predecessors, (922), 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) [2023-08-30 16:23:41,278 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 172.0) internal successors, (1720), 10 states have internal predecessors, (1720), 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) [2023-08-30 16:23:41,279 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 172.0) internal successors, (1720), 10 states have internal predecessors, (1720), 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) [2023-08-30 16:23:41,279 INFO L175 Difference]: Start difference. First operand has 85 places, 106 transitions, 790 flow. Second operand 9 states and 922 transitions. [2023-08-30 16:23:41,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 214 transitions, 1709 flow [2023-08-30 16:23:41,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 214 transitions, 1688 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 16:23:41,324 INFO L231 Difference]: Finished difference. Result has 95 places, 116 transitions, 980 flow [2023-08-30 16:23:41,324 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=172, PETRI_DIFFERENCE_MINUEND_FLOW=774, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=980, PETRI_PLACES=95, PETRI_TRANSITIONS=116} [2023-08-30 16:23:41,325 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 45 predicate places. [2023-08-30 16:23:41,325 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 116 transitions, 980 flow [2023-08-30 16:23:41,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 89.0) internal successors, (445), 5 states have internal predecessors, (445), 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) [2023-08-30 16:23:41,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 16:23:41,325 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 16:23:41,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 16:23:41,326 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)] === [2023-08-30 16:23:41,326 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 16:23:41,326 INFO L85 PathProgramCache]: Analyzing trace with hash 1454147340, now seen corresponding path program 1 times [2023-08-30 16:23:41,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 16:23:41,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939554829] [2023-08-30 16:23:41,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 16:23:41,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 16:23:41,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 16:23:41,340 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 16:23:41,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 16:23:41,362 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 16:23:41,363 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 16:23:41,363 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location readerErr0ASSERT_VIOLATIONERROR_FUNCTION (6 of 7 remaining) [2023-08-30 16:23:41,364 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location readerErr0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2023-08-30 16:23:41,365 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 7 remaining) [2023-08-30 16:23:41,365 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 7 remaining) [2023-08-30 16:23:41,365 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 7 remaining) [2023-08-30 16:23:41,365 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 7 remaining) [2023-08-30 16:23:41,365 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location readerErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2023-08-30 16:23:41,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 16:23:41,366 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1] [2023-08-30 16:23:41,369 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-30 16:23:41,370 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-30 16:23:41,396 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.08 04:23:41 BasicIcfg [2023-08-30 16:23:41,396 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-30 16:23:41,396 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-08-30 16:23:41,397 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-08-30 16:23:41,397 INFO L275 PluginConnector]: Witness Printer initialized [2023-08-30 16:23:41,397 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:23:34" (3/4) ... [2023-08-30 16:23:41,398 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2023-08-30 16:23:41,445 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2023-08-30 16:23:41,445 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-08-30 16:23:41,446 INFO L158 Benchmark]: Toolchain (without parser) took 7570.74ms. Allocated memory was 69.2MB in the beginning and 1.4GB in the end (delta: 1.4GB). Free memory was 42.3MB in the beginning and 1.0GB in the end (delta: -997.1MB). Peak memory consumption was 360.0MB. Max. memory is 16.1GB. [2023-08-30 16:23:41,446 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 69.2MB. Free memory is still 47.8MB. There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 16:23:41,446 INFO L158 Benchmark]: CACSL2BoogieTranslator took 336.20ms. Allocated memory was 69.2MB in the beginning and 100.7MB in the end (delta: 31.5MB). Free memory was 42.1MB in the beginning and 75.9MB in the end (delta: -33.8MB). Peak memory consumption was 19.7MB. Max. memory is 16.1GB. [2023-08-30 16:23:41,446 INFO L158 Benchmark]: Boogie Procedure Inliner took 45.49ms. Allocated memory is still 100.7MB. Free memory was 75.9MB in the beginning and 73.3MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-08-30 16:23:41,447 INFO L158 Benchmark]: Boogie Preprocessor took 35.54ms. Allocated memory is still 100.7MB. Free memory was 73.3MB in the beginning and 72.2MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 16:23:41,447 INFO L158 Benchmark]: RCFGBuilder took 337.45ms. Allocated memory is still 100.7MB. Free memory was 71.7MB in the beginning and 56.0MB in the end (delta: 15.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2023-08-30 16:23:41,447 INFO L158 Benchmark]: TraceAbstraction took 6762.87ms. Allocated memory was 100.7MB in the beginning and 1.4GB in the end (delta: 1.3GB). Free memory was 55.5MB in the beginning and 1.0GB in the end (delta: -991.3MB). Peak memory consumption was 336.2MB. Max. memory is 16.1GB. [2023-08-30 16:23:41,447 INFO L158 Benchmark]: Witness Printer took 48.95ms. Allocated memory is still 1.4GB. Free memory was 1.0GB in the beginning and 1.0GB in the end (delta: 7.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2023-08-30 16:23:41,449 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 69.2MB. Free memory is still 47.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 336.20ms. Allocated memory was 69.2MB in the beginning and 100.7MB in the end (delta: 31.5MB). Free memory was 42.1MB in the beginning and 75.9MB in the end (delta: -33.8MB). Peak memory consumption was 19.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 45.49ms. Allocated memory is still 100.7MB. Free memory was 75.9MB in the beginning and 73.3MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 35.54ms. Allocated memory is still 100.7MB. Free memory was 73.3MB in the beginning and 72.2MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 337.45ms. Allocated memory is still 100.7MB. Free memory was 71.7MB in the beginning and 56.0MB in the end (delta: 15.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 6762.87ms. Allocated memory was 100.7MB in the beginning and 1.4GB in the end (delta: 1.3GB). Free memory was 55.5MB in the beginning and 1.0GB in the end (delta: -991.3MB). Peak memory consumption was 336.2MB. Max. memory is 16.1GB. * Witness Printer took 48.95ms. Allocated memory is still 1.4GB. Free memory was 1.0GB in the beginning and 1.0GB in the end (delta: 7.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.1s, 104 PlacesBefore, 50 PlacesAfterwards, 93 TransitionsBefore, 37 TransitionsAfterwards, 2574 CoEnabledTransitionPairs, 6 FixpointIterations, 19 TrivialSequentialCompositions, 39 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 2 ConcurrentYvCompositions, 2 ChoiceCompositions, 62 TotalNumberOfCompositions, 8742 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 6068, independent: 5817, independent conditional: 0, independent unconditional: 5817, dependent: 251, dependent conditional: 0, dependent unconditional: 251, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1419, independent: 1380, independent conditional: 0, independent unconditional: 1380, dependent: 39, dependent conditional: 0, dependent unconditional: 39, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 6068, independent: 4437, independent conditional: 0, independent unconditional: 4437, dependent: 212, dependent conditional: 0, dependent unconditional: 212, unknown: 1419, unknown conditional: 0, unknown unconditional: 1419] , Statistics on independence cache: Total cache size (in pairs): 275, Positive cache size: 254, Positive conditional cache size: 0, Positive unconditional cache size: 254, Negative cache size: 21, Negative conditional cache size: 0, Negative unconditional cache size: 21, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - 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; [L748] 0 pthread_t t1, t2, t3, t4; [L749] FCALL, FORK 0 pthread_create(&t1, 0, writer, 0) VAL [pthread_create(&t1, 0, writer, 0)=-3, r=0, t1={8:0}, t2={7:0}, t3={5:0}, t4={6:0}, 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={8:0}, t2={7:0}, t3={5:0}, t4={6:0}, w=0, x=0, y=0] [L724] 2 int l; [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={8:0}, t2={7:0}, t3={5:0}, t4={6:0}, 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)) [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] [L752] FCALL, FORK 0 pthread_create(&t4, 0, reader, 0) VAL [pthread_create(&t4, 0, reader, 0)=0, r=1, t1={8:0}, t2={7:0}, t3={5:0}, t4={6:0}, w=0, x=0, y=0] [L724] 4 int l; [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 [L745] 2 return 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 [\result={0:0}, 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 [\result={0:0}, 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 [\result={0:0}, 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; [L738] COND TRUE 4 !(ly == lx) [L738] 4 reach_error() VAL [\result={0:0}, arg={0:0}, arg={0:0}, l=0, lx=0, 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: 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. - 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. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 135 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: 6.7s, OverallIterations: 7, TraceHistogramMax: 1, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 3.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 652 SdHoareTripleChecker+Valid, 0.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 552 mSDsluCounter, 153 SdHoareTripleChecker+Invalid, 0.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 86 mSDsCounter, 18 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1456 IncrementalHoareTripleChecker+Invalid, 1474 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 18 mSolverCounterUnsat, 67 mSDtfsCounter, 1456 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=980occurred in iteration=6, InterpolantAutomatonStates: 41, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 98 NumberOfCodeBlocks, 98 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 70 ConstructedInterpolants, 0 QuantifiedInterpolants, 122 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 6 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! [2023-08-30 16:23:41,467 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