./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 TOGETHER --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 TOGETHER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 22:52:03,120 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 22:52:03,122 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 22:52:03,166 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 22:52:03,168 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 22:52:03,171 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 22:52:03,173 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 22:52:03,175 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 22:52:03,178 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 22:52:03,186 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 22:52:03,187 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 22:52:03,188 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 22:52:03,188 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 22:52:03,190 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 22:52:03,191 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 22:52:03,195 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 22:52:03,196 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 22:52:03,197 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 22:52:03,198 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 22:52:03,200 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 22:52:03,208 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 22:52:03,209 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 22:52:03,210 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 22:52:03,211 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 22:52:03,221 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 22:52:03,221 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 22:52:03,222 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 22:52:03,223 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 22:52:03,224 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 22:52:03,225 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 22:52:03,225 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 22:52:03,230 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 22:52:03,231 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 22:52:03,232 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 22:52:03,233 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 22:52:03,234 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 22:52:03,234 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 22:52:03,235 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 22:52:03,235 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 22:52:03,236 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 22:52:03,236 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 22:52:03,238 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 22:52:03,271 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 22:52:03,272 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 22:52:03,273 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 22:52:03,273 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 22:52:03,274 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 22:52:03,274 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 22:52:03,274 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 22:52:03,275 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 22:52:03,275 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 22:52:03,275 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 22:52:03,276 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 22:52:03,276 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 22:52:03,276 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 22:52:03,276 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 22:52:03,277 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 22:52:03,277 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 22:52:03,277 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 22:52:03,277 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 22:52:03,277 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 22:52:03,278 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 22:52:03,278 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 22:52:03,278 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 22:52:03,278 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 22:52:03,278 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 22:52:03,279 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 22:52:03,279 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 22:52:03,279 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 22:52:03,279 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 22:52:03,279 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 22:52:03,280 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 22:52:03,280 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 22:52:03,280 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 22:52:03,280 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 22:52:03,280 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 22:52:03,281 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 22:52:03,281 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3e2f466b16db44ce2fec1aabf9e70b4ab734ef2801c32e66d10c5bcbcceb5301 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> TOGETHER [2023-08-30 22:52:03,600 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 22:52:03,619 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 22:52:03,622 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 22:52:03,623 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 22:52:03,623 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 22:52:03,624 INFO L432 ainManager$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 22:52:04,809 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 22:52:05,121 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 22:52:05,125 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-atomic/read_write_lock-2.i [2023-08-30 22:52:05,144 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b29adec40/7ae4f2627a3d40648f127d6260f2b6ff/FLAGbd0bf9897 [2023-08-30 22:52:05,166 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b29adec40/7ae4f2627a3d40648f127d6260f2b6ff [2023-08-30 22:52:05,167 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 22:52:05,168 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 22:52:05,169 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 22:52:05,170 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 22:52:05,172 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 22:52:05,172 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 10:52:05" (1/1) ... [2023-08-30 22:52:05,173 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e6d693 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:52:05, skipping insertion in model container [2023-08-30 22:52:05,173 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 10:52:05" (1/1) ... [2023-08-30 22:52:05,179 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 22:52:05,203 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 22:52:05,349 WARN L633 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-08-30 22:52:05,499 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 22:52:05,513 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 22:52:05,525 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 22:52:05,549 WARN L633 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-08-30 22:52:05,574 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 22:52:05,584 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 22:52:05,626 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 22:52:05,626 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 22:52:05,626 WARN L667 CHandler]: The function __builtin_bswap16 is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 22:52:05,632 INFO L208 MainTranslator]: Completed translation [2023-08-30 22:52:05,632 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:52:05 WrapperNode [2023-08-30 22:52:05,633 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 22:52:05,634 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 22:52:05,634 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 22:52:05,634 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 22:52:05,640 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:52:05" (1/1) ... [2023-08-30 22:52:05,678 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:52:05" (1/1) ... [2023-08-30 22:52:05,704 INFO L138 Inliner]: procedures = 174, calls = 51, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 119 [2023-08-30 22:52:05,705 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 22:52:05,705 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 22:52:05,706 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 22:52:05,706 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 22:52:05,713 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:52:05" (1/1) ... [2023-08-30 22:52:05,713 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:52:05" (1/1) ... [2023-08-30 22:52:05,730 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:52:05" (1/1) ... [2023-08-30 22:52:05,731 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:52:05" (1/1) ... [2023-08-30 22:52:05,735 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:52:05" (1/1) ... [2023-08-30 22:52:05,744 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:52:05" (1/1) ... [2023-08-30 22:52:05,745 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:52:05" (1/1) ... [2023-08-30 22:52:05,752 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:52:05" (1/1) ... [2023-08-30 22:52:05,755 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 22:52:05,755 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 22:52:05,756 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 22:52:05,756 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 22:52:05,756 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:52:05" (1/1) ... [2023-08-30 22:52:05,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 22:52:05,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 22:52:05,790 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 22:52:05,802 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 22:52:05,821 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 22:52:05,821 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 22:52:05,821 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 22:52:05,821 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 22:52:05,821 INFO L130 BoogieDeclarations]: Found specification of procedure reader [2023-08-30 22:52:05,821 INFO L138 BoogieDeclarations]: Found implementation of procedure reader [2023-08-30 22:52:05,821 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 22:52:05,821 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 22:52:05,821 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 22:52:05,822 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 22:52:05,822 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 22:52:05,822 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 22:52:05,822 INFO L130 BoogieDeclarations]: Found specification of procedure writer [2023-08-30 22:52:05,822 INFO L138 BoogieDeclarations]: Found implementation of procedure writer [2023-08-30 22:52:05,823 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 22:52:05,928 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 22:52:05,930 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 22:52:06,179 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 22:52:06,225 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 22:52:06,231 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-08-30 22:52:06,234 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 10:52:06 BoogieIcfgContainer [2023-08-30 22:52:06,234 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 22:52:06,236 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 22:52:06,236 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 22:52:06,238 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 22:52:06,240 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 10:52:05" (1/3) ... [2023-08-30 22:52:06,241 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52021a4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 10:52:06, skipping insertion in model container [2023-08-30 22:52:06,241 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 10:52:05" (2/3) ... [2023-08-30 22:52:06,242 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52021a4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 10:52:06, skipping insertion in model container [2023-08-30 22:52:06,242 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 10:52:06" (3/3) ... [2023-08-30 22:52:06,243 INFO L112 eAbstractionObserver]: Analyzing ICFG read_write_lock-2.i [2023-08-30 22:52:06,249 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 22:52:06,255 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 22:52:06,255 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-30 22:52:06,255 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 22:52:06,348 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-30 22:52:06,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 121 places, 110 transitions, 252 flow [2023-08-30 22:52:06,431 INFO L130 PetriNetUnfolder]: 2/106 cut-off events. [2023-08-30 22:52:06,431 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-08-30 22:52:06,437 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 22:52:06,437 INFO L82 GeneralOperation]: Start removeDead. Operand has 121 places, 110 transitions, 252 flow [2023-08-30 22:52:06,441 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 104 places, 93 transitions, 207 flow [2023-08-30 22:52:06,444 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 22:52:06,452 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 104 places, 93 transitions, 207 flow [2023-08-30 22:52:06,454 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 104 places, 93 transitions, 207 flow [2023-08-30 22:52:06,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 104 places, 93 transitions, 207 flow [2023-08-30 22:52:06,488 INFO L130 PetriNetUnfolder]: 2/93 cut-off events. [2023-08-30 22:52:06,493 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 22:52:06,494 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 22:52:06,496 INFO L119 LiptonReduction]: Number of co-enabled transitions 2574 [2023-08-30 22:52:08,851 INFO L134 LiptonReduction]: Checked pairs total: 8742 [2023-08-30 22:52:08,852 INFO L136 LiptonReduction]: Total number of compositions: 62 [2023-08-30 22:52:08,864 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 22:52:08,868 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;@366737e8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 22:52:08,869 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-08-30 22:52:08,874 INFO L130 PetriNetUnfolder]: 0/18 cut-off events. [2023-08-30 22:52:08,875 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-08-30 22:52:08,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:52:08,876 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:52:08,876 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 22:52:08,880 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:52:08,881 INFO L85 PathProgramCache]: Analyzing trace with hash -71968847, now seen corresponding path program 1 times [2023-08-30 22:52:08,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:52:08,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972641032] [2023-08-30 22:52:08,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:52:08,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:52:08,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:52:09,163 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 22:52:09,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:52:09,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972641032] [2023-08-30 22:52:09,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972641032] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 22:52:09,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 22:52:09,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 22:52:09,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968098771] [2023-08-30 22:52:09,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 22:52:09,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 22:52:09,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:52:09,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 22:52:09,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 22:52:09,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 172 [2023-08-30 22:52:09,271 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 22:52:09,272 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:52:09,272 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 172 [2023-08-30 22:52:09,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:52:10,715 INFO L130 PetriNetUnfolder]: 11095/16828 cut-off events. [2023-08-30 22:52:10,716 INFO L131 PetriNetUnfolder]: For 1528/1528 co-relation queries the response was YES. [2023-08-30 22:52:10,752 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 22:52:10,827 INFO L137 encePairwiseOnDemand]: 163/172 looper letters, 132 selfloop transitions, 26 changer transitions 4/166 dead transitions. [2023-08-30 22:52:10,827 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 166 transitions, 740 flow [2023-08-30 22:52:10,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 22:52:10,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 22:52:10,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 938 transitions. [2023-08-30 22:52:10,843 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6059431524547804 [2023-08-30 22:52:10,843 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 938 transitions. [2023-08-30 22:52:10,844 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 938 transitions. [2023-08-30 22:52:10,846 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:52:10,848 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 938 transitions. [2023-08-30 22:52:10,853 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 22:52:10,859 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 22:52:10,860 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 22:52:10,861 INFO L175 Difference]: Start difference. First operand has 50 places, 37 transitions, 95 flow. Second operand 9 states and 938 transitions. [2023-08-30 22:52:10,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 166 transitions, 740 flow [2023-08-30 22:52:10,878 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 22:52:10,914 INFO L231 Difference]: Finished difference. Result has 55 places, 62 transitions, 223 flow [2023-08-30 22:52:10,916 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 22:52:10,918 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 5 predicate places. [2023-08-30 22:52:10,919 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 62 transitions, 223 flow [2023-08-30 22:52:10,919 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 22:52:10,919 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:52:10,919 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:52:10,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 22:52:10,920 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 22:52:10,920 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:52:10,920 INFO L85 PathProgramCache]: Analyzing trace with hash 993862366, now seen corresponding path program 1 times [2023-08-30 22:52:10,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:52:10,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556055876] [2023-08-30 22:52:10,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:52:10,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:52:10,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:52:11,061 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 22:52:11,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:52:11,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556055876] [2023-08-30 22:52:11,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556055876] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 22:52:11,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 22:52:11,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 22:52:11,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118996143] [2023-08-30 22:52:11,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 22:52:11,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 22:52:11,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:52:11,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 22:52:11,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 22:52:11,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 172 [2023-08-30 22:52:11,070 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 22:52:11,070 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:52:11,070 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 172 [2023-08-30 22:52:11,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:52:11,714 INFO L130 PetriNetUnfolder]: 4668/7927 cut-off events. [2023-08-30 22:52:11,715 INFO L131 PetriNetUnfolder]: For 2413/2672 co-relation queries the response was YES. [2023-08-30 22:52:11,734 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 22:52:11,775 INFO L137 encePairwiseOnDemand]: 166/172 looper letters, 46 selfloop transitions, 4 changer transitions 0/82 dead transitions. [2023-08-30 22:52:11,776 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 82 transitions, 384 flow [2023-08-30 22:52:11,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 22:52:11,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 22:52:11,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 327 transitions. [2023-08-30 22:52:11,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6337209302325582 [2023-08-30 22:52:11,778 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 327 transitions. [2023-08-30 22:52:11,778 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 327 transitions. [2023-08-30 22:52:11,778 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:52:11,778 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 327 transitions. [2023-08-30 22:52:11,779 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 22:52:11,781 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 22:52:11,781 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 22:52:11,781 INFO L175 Difference]: Start difference. First operand has 55 places, 62 transitions, 223 flow. Second operand 3 states and 327 transitions. [2023-08-30 22:52:11,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 82 transitions, 384 flow [2023-08-30 22:52:11,797 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 22:52:11,800 INFO L231 Difference]: Finished difference. Result has 58 places, 62 transitions, 239 flow [2023-08-30 22:52:11,800 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 22:52:11,801 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 8 predicate places. [2023-08-30 22:52:11,801 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 62 transitions, 239 flow [2023-08-30 22:52:11,801 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 22:52:11,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:52:11,802 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:52:11,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 22:52:11,802 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 22:52:11,804 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:52:11,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1474564512, now seen corresponding path program 2 times [2023-08-30 22:52:11,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:52:11,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539724479] [2023-08-30 22:52:11,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:52:11,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:52:11,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:52:11,924 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 22:52:11,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:52:11,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539724479] [2023-08-30 22:52:11,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539724479] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 22:52:11,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 22:52:11,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-30 22:52:11,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820529143] [2023-08-30 22:52:11,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 22:52:11,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-30 22:52:11,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:52:11,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-30 22:52:11,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-30 22:52:11,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 172 [2023-08-30 22:52:11,941 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 22:52:11,941 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:52:11,941 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 172 [2023-08-30 22:52:11,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:52:12,347 INFO L130 PetriNetUnfolder]: 1766/3702 cut-off events. [2023-08-30 22:52:12,347 INFO L131 PetriNetUnfolder]: For 2875/2954 co-relation queries the response was YES. [2023-08-30 22:52:12,353 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 22:52:12,361 INFO L137 encePairwiseOnDemand]: 165/172 looper letters, 55 selfloop transitions, 7 changer transitions 14/108 dead transitions. [2023-08-30 22:52:12,361 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 108 transitions, 541 flow [2023-08-30 22:52:12,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-30 22:52:12,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-30 22:52:12,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 443 transitions. [2023-08-30 22:52:12,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6438953488372093 [2023-08-30 22:52:12,363 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 443 transitions. [2023-08-30 22:52:12,363 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 443 transitions. [2023-08-30 22:52:12,363 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:52:12,364 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 443 transitions. [2023-08-30 22:52:12,365 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 22:52:12,366 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 22:52:12,366 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 22:52:12,366 INFO L175 Difference]: Start difference. First operand has 58 places, 62 transitions, 239 flow. Second operand 4 states and 443 transitions. [2023-08-30 22:52:12,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 108 transitions, 541 flow [2023-08-30 22:52:12,374 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 22:52:12,375 INFO L231 Difference]: Finished difference. Result has 62 places, 65 transitions, 281 flow [2023-08-30 22:52:12,375 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 22:52:12,376 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 12 predicate places. [2023-08-30 22:52:12,376 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 65 transitions, 281 flow [2023-08-30 22:52:12,376 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 22:52:12,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:52:12,377 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:52:12,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 22:52:12,377 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 22:52:12,377 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:52:12,377 INFO L85 PathProgramCache]: Analyzing trace with hash -941351057, now seen corresponding path program 1 times [2023-08-30 22:52:12,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:52:12,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655597034] [2023-08-30 22:52:12,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:52:12,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:52:12,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:52:12,427 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 22:52:12,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:52:12,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655597034] [2023-08-30 22:52:12,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655597034] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 22:52:12,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 22:52:12,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 22:52:12,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118810692] [2023-08-30 22:52:12,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 22:52:12,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 22:52:12,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:52:12,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 22:52:12,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 22:52:12,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 172 [2023-08-30 22:52:12,459 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 22:52:12,459 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:52:12,460 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 172 [2023-08-30 22:52:12,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:52:13,138 INFO L130 PetriNetUnfolder]: 3190/5891 cut-off events. [2023-08-30 22:52:13,138 INFO L131 PetriNetUnfolder]: For 5472/5628 co-relation queries the response was YES. [2023-08-30 22:52:13,147 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 22:52:13,159 INFO L137 encePairwiseOnDemand]: 162/172 looper letters, 133 selfloop transitions, 43 changer transitions 36/217 dead transitions. [2023-08-30 22:52:13,159 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 217 transitions, 1342 flow [2023-08-30 22:52:13,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 22:52:13,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 22:52:13,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 936 transitions. [2023-08-30 22:52:13,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6046511627906976 [2023-08-30 22:52:13,166 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 936 transitions. [2023-08-30 22:52:13,166 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 936 transitions. [2023-08-30 22:52:13,166 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:52:13,166 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 936 transitions. [2023-08-30 22:52:13,168 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 22:52:13,172 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 22:52:13,172 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 22:52:13,172 INFO L175 Difference]: Start difference. First operand has 62 places, 65 transitions, 281 flow. Second operand 9 states and 936 transitions. [2023-08-30 22:52:13,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 217 transitions, 1342 flow [2023-08-30 22:52:13,186 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 22:52:13,190 INFO L231 Difference]: Finished difference. Result has 77 places, 97 transitions, 620 flow [2023-08-30 22:52:13,190 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 22:52:13,191 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 27 predicate places. [2023-08-30 22:52:13,192 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 97 transitions, 620 flow [2023-08-30 22:52:13,192 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 22:52:13,192 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:52:13,192 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:52:13,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 22:52:13,192 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 22:52:13,193 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:52:13,193 INFO L85 PathProgramCache]: Analyzing trace with hash -671571630, now seen corresponding path program 1 times [2023-08-30 22:52:13,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:52:13,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812291736] [2023-08-30 22:52:13,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:52:13,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:52:13,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:52:13,276 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 22:52:13,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:52:13,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812291736] [2023-08-30 22:52:13,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812291736] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 22:52:13,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 22:52:13,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 22:52:13,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563922084] [2023-08-30 22:52:13,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 22:52:13,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 22:52:13,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:52:13,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 22:52:13,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 22:52:13,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 172 [2023-08-30 22:52:13,308 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 22:52:13,308 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:52:13,308 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 172 [2023-08-30 22:52:13,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:52:14,049 INFO L130 PetriNetUnfolder]: 2901/5550 cut-off events. [2023-08-30 22:52:14,050 INFO L131 PetriNetUnfolder]: For 9076/9164 co-relation queries the response was YES. [2023-08-30 22:52:14,062 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 22:52:14,073 INFO L137 encePairwiseOnDemand]: 163/172 looper letters, 120 selfloop transitions, 46 changer transitions 20/191 dead transitions. [2023-08-30 22:52:14,073 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 191 transitions, 1416 flow [2023-08-30 22:52:14,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 22:52:14,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 22:52:14,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 735 transitions. [2023-08-30 22:52:14,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6104651162790697 [2023-08-30 22:52:14,076 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 735 transitions. [2023-08-30 22:52:14,076 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 735 transitions. [2023-08-30 22:52:14,076 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:52:14,076 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 735 transitions. [2023-08-30 22:52:14,079 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 22:52:14,081 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 22:52:14,081 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 22:52:14,082 INFO L175 Difference]: Start difference. First operand has 77 places, 97 transitions, 620 flow. Second operand 7 states and 735 transitions. [2023-08-30 22:52:14,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 191 transitions, 1416 flow [2023-08-30 22:52:14,125 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 22:52:14,128 INFO L231 Difference]: Finished difference. Result has 85 places, 106 transitions, 790 flow [2023-08-30 22:52:14,128 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 22:52:14,130 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 35 predicate places. [2023-08-30 22:52:14,130 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 106 transitions, 790 flow [2023-08-30 22:52:14,131 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 22:52:14,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:52:14,131 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 22:52:14,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 22:52:14,131 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 22:52:14,131 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:52:14,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1009867708, now seen corresponding path program 1 times [2023-08-30 22:52:14,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:52:14,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422705774] [2023-08-30 22:52:14,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:52:14,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:52:14,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 22:52:14,210 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 22:52:14,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 22:52:14,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422705774] [2023-08-30 22:52:14,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422705774] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 22:52:14,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 22:52:14,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 22:52:14,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323511070] [2023-08-30 22:52:14,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 22:52:14,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 22:52:14,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 22:52:14,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 22:52:14,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 22:52:14,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 172 [2023-08-30 22:52:14,238 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 22:52:14,238 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 22:52:14,238 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 172 [2023-08-30 22:52:14,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 22:52:14,862 INFO L130 PetriNetUnfolder]: 2518/5053 cut-off events. [2023-08-30 22:52:14,862 INFO L131 PetriNetUnfolder]: For 10689/10808 co-relation queries the response was YES. [2023-08-30 22:52:14,874 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 22:52:14,886 INFO L137 encePairwiseOnDemand]: 162/172 looper letters, 124 selfloop transitions, 53 changer transitions 27/214 dead transitions. [2023-08-30 22:52:14,886 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 214 transitions, 1709 flow [2023-08-30 22:52:14,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 22:52:14,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 22:52:14,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 922 transitions. [2023-08-30 22:52:14,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5956072351421189 [2023-08-30 22:52:14,889 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 922 transitions. [2023-08-30 22:52:14,890 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 922 transitions. [2023-08-30 22:52:14,890 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 22:52:14,890 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 922 transitions. [2023-08-30 22:52:14,892 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 22:52:14,895 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 22:52:14,895 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 22:52:14,895 INFO L175 Difference]: Start difference. First operand has 85 places, 106 transitions, 790 flow. Second operand 9 states and 922 transitions. [2023-08-30 22:52:14,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 214 transitions, 1709 flow [2023-08-30 22:52:14,961 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 22:52:14,964 INFO L231 Difference]: Finished difference. Result has 95 places, 116 transitions, 980 flow [2023-08-30 22:52:14,964 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 22:52:14,967 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 45 predicate places. [2023-08-30 22:52:14,967 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 116 transitions, 980 flow [2023-08-30 22:52:14,968 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 22:52:14,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 22:52:14,968 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 22:52:14,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 22:52:14,969 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 22:52:14,970 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 22:52:14,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1454147340, now seen corresponding path program 1 times [2023-08-30 22:52:14,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 22:52:14,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122847451] [2023-08-30 22:52:14,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 22:52:14,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 22:52:14,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 22:52:14,998 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-30 22:52:15,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-30 22:52:15,046 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-30 22:52:15,047 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-30 22:52:15,047 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location readerErr0ASSERT_VIOLATIONERROR_FUNCTION (6 of 7 remaining) [2023-08-30 22:52:15,051 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location readerErr0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2023-08-30 22:52:15,052 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 7 remaining) [2023-08-30 22:52:15,052 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 7 remaining) [2023-08-30 22:52:15,052 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 7 remaining) [2023-08-30 22:52:15,052 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 7 remaining) [2023-08-30 22:52:15,052 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location readerErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2023-08-30 22:52:15,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-30 22:52:15,053 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1] [2023-08-30 22:52:15,058 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-30 22:52:15,059 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-30 22:52:15,103 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.08 10:52:15 BasicIcfg [2023-08-30 22:52:15,106 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-30 22:52:15,107 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-08-30 22:52:15,107 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-08-30 22:52:15,107 INFO L275 PluginConnector]: Witness Printer initialized [2023-08-30 22:52:15,107 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 10:52:06" (3/4) ... [2023-08-30 22:52:15,109 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2023-08-30 22:52:15,181 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2023-08-30 22:52:15,181 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-08-30 22:52:15,182 INFO L158 Benchmark]: Toolchain (without parser) took 10013.06ms. Allocated memory was 73.4MB in the beginning and 2.0GB in the end (delta: 1.9GB). Free memory was 50.3MB in the beginning and 1.7GB in the end (delta: -1.7GB). Peak memory consumption was 249.6MB. Max. memory is 16.1GB. [2023-08-30 22:52:15,182 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 60.8MB. Free memory is still 38.9MB. There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 22:52:15,182 INFO L158 Benchmark]: CACSL2BoogieTranslator took 464.02ms. Allocated memory is still 73.4MB. Free memory was 50.1MB in the beginning and 48.1MB in the end (delta: 2.0MB). Peak memory consumption was 21.8MB. Max. memory is 16.1GB. [2023-08-30 22:52:15,182 INFO L158 Benchmark]: Boogie Procedure Inliner took 70.89ms. Allocated memory is still 73.4MB. Free memory was 48.1MB in the beginning and 46.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-08-30 22:52:15,182 INFO L158 Benchmark]: Boogie Preprocessor took 49.31ms. Allocated memory is still 73.4MB. Free memory was 46.0MB in the beginning and 44.5MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 22:52:15,183 INFO L158 Benchmark]: RCFGBuilder took 478.65ms. Allocated memory is still 73.4MB. Free memory was 44.5MB in the beginning and 50.9MB in the end (delta: -6.4MB). Peak memory consumption was 21.4MB. Max. memory is 16.1GB. [2023-08-30 22:52:15,183 INFO L158 Benchmark]: TraceAbstraction took 8870.62ms. Allocated memory was 73.4MB in the beginning and 2.0GB in the end (delta: 1.9GB). Free memory was 50.6MB in the beginning and 1.8GB in the end (delta: -1.7GB). Peak memory consumption was 240.0MB. Max. memory is 16.1GB. [2023-08-30 22:52:15,183 INFO L158 Benchmark]: Witness Printer took 74.49ms. Allocated memory is still 2.0GB. Free memory was 1.8GB in the beginning and 1.7GB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-08-30 22:52:15,184 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 60.8MB. Free memory is still 38.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 464.02ms. Allocated memory is still 73.4MB. Free memory was 50.1MB in the beginning and 48.1MB in the end (delta: 2.0MB). Peak memory consumption was 21.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 70.89ms. Allocated memory is still 73.4MB. Free memory was 48.1MB in the beginning and 46.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 49.31ms. Allocated memory is still 73.4MB. Free memory was 46.0MB in the beginning and 44.5MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 478.65ms. Allocated memory is still 73.4MB. Free memory was 44.5MB in the beginning and 50.9MB in the end (delta: -6.4MB). Peak memory consumption was 21.4MB. Max. memory is 16.1GB. * TraceAbstraction took 8870.62ms. Allocated memory was 73.4MB in the beginning and 2.0GB in the end (delta: 1.9GB). Free memory was 50.6MB in the beginning and 1.8GB in the end (delta: -1.7GB). Peak memory consumption was 240.0MB. Max. memory is 16.1GB. * Witness Printer took 74.49ms. Allocated memory is still 2.0GB. Free memory was 1.8GB in the beginning and 1.7GB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.4s, 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: 8.7s, OverallIterations: 7, TraceHistogramMax: 1, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 5.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.5s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 652 SdHoareTripleChecker+Valid, 0.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 552 mSDsluCounter, 153 SdHoareTripleChecker+Invalid, 0.7s 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, 0.5s 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 22:52:15,209 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE