/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread-atomic/read_write_lock-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-27 17:45:44,192 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-27 17:45:44,194 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-27 17:45:44,232 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-27 17:45:44,233 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-27 17:45:44,235 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-27 17:45:44,238 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-27 17:45:44,241 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-27 17:45:44,243 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-27 17:45:44,247 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-27 17:45:44,248 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-27 17:45:44,250 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-27 17:45:44,250 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-27 17:45:44,253 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-27 17:45:44,254 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-27 17:45:44,255 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-27 17:45:44,255 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-27 17:45:44,256 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-27 17:45:44,258 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-27 17:45:44,262 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-27 17:45:44,263 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-27 17:45:44,264 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-27 17:45:44,265 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-27 17:45:44,266 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-27 17:45:44,274 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-01-27 17:45:44,274 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-01-27 17:45:44,274 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-01-27 17:45:44,275 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-01-27 17:45:44,276 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-01-27 17:45:44,276 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-01-27 17:45:44,276 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-01-27 17:45:44,277 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-01-27 17:45:44,278 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-01-27 17:45:44,279 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-01-27 17:45:44,279 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-01-27 17:45:44,280 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-01-27 17:45:44,280 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-01-27 17:45:44,281 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-01-27 17:45:44,281 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-27 17:45:44,281 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-27 17:45:44,282 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-27 17:45:44,283 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-01-27 17:45:44,310 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-27 17:45:44,310 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-27 17:45:44,311 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-27 17:45:44,311 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-27 17:45:44,312 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-27 17:45:44,312 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-27 17:45:44,313 INFO L138 SettingsManager]: * Use SBE=true [2023-01-27 17:45:44,313 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-27 17:45:44,313 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-27 17:45:44,313 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-27 17:45:44,314 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-27 17:45:44,314 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-27 17:45:44,314 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-27 17:45:44,314 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-27 17:45:44,314 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-27 17:45:44,314 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-27 17:45:44,314 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-27 17:45:44,314 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-27 17:45:44,314 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-27 17:45:44,315 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-27 17:45:44,315 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-27 17:45:44,315 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-27 17:45:44,315 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-27 17:45:44,315 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 17:45:44,315 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-27 17:45:44,315 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-27 17:45:44,315 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-27 17:45:44,316 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-27 17:45:44,316 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-27 17:45:44,316 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-27 17:45:44,316 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-27 17:45:44,316 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-01-27 17:45:44,553 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-27 17:45:44,584 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-27 17:45:44,586 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-27 17:45:44,587 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-27 17:45:44,587 INFO L275 PluginConnector]: CDTParser initialized [2023-01-27 17:45:44,588 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-atomic/read_write_lock-1.i [2023-01-27 17:45:45,826 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-27 17:45:46,064 INFO L351 CDTParser]: Found 1 translation units. [2023-01-27 17:45:46,064 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-atomic/read_write_lock-1.i [2023-01-27 17:45:46,081 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da592c3f2/62de44f8680b46709cd8367f3bf61e71/FLAGa05a1b00b [2023-01-27 17:45:46,098 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da592c3f2/62de44f8680b46709cd8367f3bf61e71 [2023-01-27 17:45:46,100 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-27 17:45:46,101 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-27 17:45:46,103 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-27 17:45:46,104 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-27 17:45:46,106 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-27 17:45:46,107 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 05:45:46" (1/1) ... [2023-01-27 17:45:46,108 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ef631fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:45:46, skipping insertion in model container [2023-01-27 17:45:46,108 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 05:45:46" (1/1) ... [2023-01-27 17:45:46,114 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-27 17:45:46,152 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-27 17:45:46,326 WARN L633 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-01-27 17:45:46,440 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-1.i[31246,31259] [2023-01-27 17:45:46,452 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 17:45:46,463 INFO L203 MainTranslator]: Completed pre-run [2023-01-27 17:45:46,490 WARN L633 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2023-01-27 17:45:46,504 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-1.i[31246,31259] [2023-01-27 17:45:46,518 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-27 17:45:46,539 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-01-27 17:45:46,540 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-01-27 17:45:46,540 WARN L667 CHandler]: The function __builtin_bswap16 is called, but not defined or handled by StandardFunctionHandler. [2023-01-27 17:45:46,544 INFO L208 MainTranslator]: Completed translation [2023-01-27 17:45:46,544 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:45:46 WrapperNode [2023-01-27 17:45:46,544 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-27 17:45:46,545 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-27 17:45:46,545 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-27 17:45:46,545 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-27 17:45:46,551 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:45:46" (1/1) ... [2023-01-27 17:45:46,566 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:45:46" (1/1) ... [2023-01-27 17:45:46,591 INFO L138 Inliner]: procedures = 175, calls = 46, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 114 [2023-01-27 17:45:46,592 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-27 17:45:46,592 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-27 17:45:46,592 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-27 17:45:46,593 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-27 17:45:46,600 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:45:46" (1/1) ... [2023-01-27 17:45:46,600 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:45:46" (1/1) ... [2023-01-27 17:45:46,602 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:45:46" (1/1) ... [2023-01-27 17:45:46,603 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:45:46" (1/1) ... [2023-01-27 17:45:46,607 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:45:46" (1/1) ... [2023-01-27 17:45:46,608 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:45:46" (1/1) ... [2023-01-27 17:45:46,613 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:45:46" (1/1) ... [2023-01-27 17:45:46,614 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:45:46" (1/1) ... [2023-01-27 17:45:46,616 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-27 17:45:46,617 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-27 17:45:46,617 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-27 17:45:46,617 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-27 17:45:46,618 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:45:46" (1/1) ... [2023-01-27 17:45:46,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-27 17:45:46,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-27 17:45:46,664 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) [2023-01-27 17:45:46,692 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 [2023-01-27 17:45:46,705 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-27 17:45:46,705 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-27 17:45:46,705 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-01-27 17:45:46,706 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-27 17:45:46,706 INFO L130 BoogieDeclarations]: Found specification of procedure reader [2023-01-27 17:45:46,706 INFO L138 BoogieDeclarations]: Found implementation of procedure reader [2023-01-27 17:45:46,707 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-27 17:45:46,707 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-27 17:45:46,707 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-27 17:45:46,707 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-01-27 17:45:46,707 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-27 17:45:46,707 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-27 17:45:46,707 INFO L130 BoogieDeclarations]: Found specification of procedure writer [2023-01-27 17:45:46,707 INFO L138 BoogieDeclarations]: Found implementation of procedure writer [2023-01-27 17:45:46,708 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-01-27 17:45:46,885 INFO L236 CfgBuilder]: Building ICFG [2023-01-27 17:45:46,887 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-27 17:45:47,130 INFO L277 CfgBuilder]: Performing block encoding [2023-01-27 17:45:47,182 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-27 17:45:47,182 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-01-27 17:45:47,184 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 05:45:47 BoogieIcfgContainer [2023-01-27 17:45:47,184 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-27 17:45:47,186 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-27 17:45:47,186 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-27 17:45:47,189 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-27 17:45:47,189 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 05:45:46" (1/3) ... [2023-01-27 17:45:47,190 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27d0c7bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 05:45:47, skipping insertion in model container [2023-01-27 17:45:47,190 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 05:45:46" (2/3) ... [2023-01-27 17:45:47,190 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27d0c7bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 05:45:47, skipping insertion in model container [2023-01-27 17:45:47,190 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 05:45:47" (3/3) ... [2023-01-27 17:45:47,191 INFO L112 eAbstractionObserver]: Analyzing ICFG read_write_lock-1.i [2023-01-27 17:45:47,209 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-27 17:45:47,210 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-27 17:45:47,210 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-27 17:45:47,286 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-01-27 17:45:47,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 119 places, 108 transitions, 248 flow [2023-01-27 17:45:47,357 INFO L130 PetriNetUnfolder]: 2/104 cut-off events. [2023-01-27 17:45:47,357 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-01-27 17:45:47,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121 conditions, 104 events. 2/104 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 92 event pairs, 0 based on Foata normal form. 0/100 useless extension candidates. Maximal degree in co-relation 70. Up to 2 conditions per place. [2023-01-27 17:45:47,363 INFO L82 GeneralOperation]: Start removeDead. Operand has 119 places, 108 transitions, 248 flow [2023-01-27 17:45:47,366 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 102 places, 91 transitions, 203 flow [2023-01-27 17:45:47,370 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-27 17:45:47,377 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 102 places, 91 transitions, 203 flow [2023-01-27 17:45:47,380 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 102 places, 91 transitions, 203 flow [2023-01-27 17:45:47,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 102 places, 91 transitions, 203 flow [2023-01-27 17:45:47,403 INFO L130 PetriNetUnfolder]: 2/91 cut-off events. [2023-01-27 17:45:47,403 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-01-27 17:45:47,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107 conditions, 91 events. 2/91 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 92 event pairs, 0 based on Foata normal form. 0/87 useless extension candidates. Maximal degree in co-relation 70. Up to 2 conditions per place. [2023-01-27 17:45:47,409 INFO L119 LiptonReduction]: Number of co-enabled transitions 2408 [2023-01-27 17:45:50,353 INFO L134 LiptonReduction]: Checked pairs total: 8945 [2023-01-27 17:45:50,353 INFO L136 LiptonReduction]: Total number of compositions: 63 [2023-01-27 17:45:50,366 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-27 17:45:50,371 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@6320b81d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-27 17:45:50,371 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-01-27 17:45:50,377 INFO L130 PetriNetUnfolder]: 1/21 cut-off events. [2023-01-27 17:45:50,377 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2023-01-27 17:45:50,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:45:50,378 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 17:45:50,379 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)] === [2023-01-27 17:45:50,383 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:45:50,383 INFO L85 PathProgramCache]: Analyzing trace with hash -1113232104, now seen corresponding path program 1 times [2023-01-27 17:45:50,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:45:50,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960121003] [2023-01-27 17:45:50,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:45:50,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:45:50,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 17:45:50,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 17:45:50,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 17:45:50,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960121003] [2023-01-27 17:45:50,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960121003] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 17:45:50,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 17:45:50,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-27 17:45:50,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687318449] [2023-01-27 17:45:50,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 17:45:50,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-27 17:45:50,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 17:45:50,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-27 17:45:50,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-01-27 17:45:50,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 171 [2023-01-27 17:45:50,717 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 39 transitions, 99 flow. Second operand has 5 states, 5 states have (on average 78.8) internal successors, (394), 5 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:45:50,717 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 17:45:50,717 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 171 [2023-01-27 17:45:50,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 17:45:52,623 INFO L130 PetriNetUnfolder]: 17447/24372 cut-off events. [2023-01-27 17:45:52,624 INFO L131 PetriNetUnfolder]: For 2370/2370 co-relation queries the response was YES. [2023-01-27 17:45:52,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50018 conditions, 24372 events. 17447/24372 cut-off events. For 2370/2370 co-relation queries the response was YES. Maximal size of possible extension queue 814. Compared 136289 event pairs, 3315 based on Foata normal form. 832/22984 useless extension candidates. Maximal degree in co-relation 39022. Up to 11107 conditions per place. [2023-01-27 17:45:52,798 INFO L137 encePairwiseOnDemand]: 161/171 looper letters, 134 selfloop transitions, 18 changer transitions 0/152 dead transitions. [2023-01-27 17:45:52,798 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 152 transitions, 686 flow [2023-01-27 17:45:52,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-27 17:45:52,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-27 17:45:52,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 701 transitions. [2023-01-27 17:45:52,812 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5856307435254804 [2023-01-27 17:45:52,812 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 701 transitions. [2023-01-27 17:45:52,812 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 701 transitions. [2023-01-27 17:45:52,814 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 17:45:52,817 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 701 transitions. [2023-01-27 17:45:52,821 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 100.14285714285714) internal successors, (701), 7 states have internal predecessors, (701), 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) [2023-01-27 17:45:52,828 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 171.0) internal successors, (1368), 8 states have internal predecessors, (1368), 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) [2023-01-27 17:45:52,829 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 171.0) internal successors, (1368), 8 states have internal predecessors, (1368), 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) [2023-01-27 17:45:52,831 INFO L175 Difference]: Start difference. First operand has 50 places, 39 transitions, 99 flow. Second operand 7 states and 701 transitions. [2023-01-27 17:45:52,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 152 transitions, 686 flow [2023-01-27 17:45:52,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 152 transitions, 639 flow, removed 0 selfloop flow, removed 7 redundant places. [2023-01-27 17:45:52,859 INFO L231 Difference]: Finished difference. Result has 52 places, 53 transitions, 184 flow [2023-01-27 17:45:52,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=184, PETRI_PLACES=52, PETRI_TRANSITIONS=53} [2023-01-27 17:45:52,864 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 2 predicate places. [2023-01-27 17:45:52,864 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 53 transitions, 184 flow [2023-01-27 17:45:52,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 78.8) internal successors, (394), 5 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:45:52,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:45:52,865 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 17:45:52,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-27 17:45:52,865 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)] === [2023-01-27 17:45:52,866 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:45:52,866 INFO L85 PathProgramCache]: Analyzing trace with hash 1463498058, now seen corresponding path program 1 times [2023-01-27 17:45:52,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:45:52,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009127203] [2023-01-27 17:45:52,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:45:52,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:45:52,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 17:45:52,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 17:45:52,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 17:45:52,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009127203] [2023-01-27 17:45:52,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009127203] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 17:45:52,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 17:45:52,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-27 17:45:52,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616945791] [2023-01-27 17:45:52,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 17:45:52,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-01-27 17:45:52,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 17:45:52,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-01-27 17:45:52,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-01-27 17:45:52,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 171 [2023-01-27 17:45:52,997 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 53 transitions, 184 flow. Second operand has 3 states, 3 states have (on average 91.33333333333333) internal successors, (274), 3 states have internal predecessors, (274), 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) [2023-01-27 17:45:52,997 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 17:45:52,998 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 171 [2023-01-27 17:45:52,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 17:45:53,524 INFO L130 PetriNetUnfolder]: 3521/6234 cut-off events. [2023-01-27 17:45:53,524 INFO L131 PetriNetUnfolder]: For 1594/1710 co-relation queries the response was YES. [2023-01-27 17:45:53,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13346 conditions, 6234 events. 3521/6234 cut-off events. For 1594/1710 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 48950 event pairs, 1266 based on Foata normal form. 618/6051 useless extension candidates. Maximal degree in co-relation 8713. Up to 2671 conditions per place. [2023-01-27 17:45:53,635 INFO L137 encePairwiseOnDemand]: 165/171 looper letters, 38 selfloop transitions, 4 changer transitions 0/69 dead transitions. [2023-01-27 17:45:53,635 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 69 transitions, 310 flow [2023-01-27 17:45:53,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-01-27 17:45:53,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-01-27 17:45:53,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 313 transitions. [2023-01-27 17:45:53,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6101364522417154 [2023-01-27 17:45:53,637 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 313 transitions. [2023-01-27 17:45:53,637 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 313 transitions. [2023-01-27 17:45:53,637 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 17:45:53,637 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 313 transitions. [2023-01-27 17:45:53,638 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 104.33333333333333) internal successors, (313), 3 states have internal predecessors, (313), 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) [2023-01-27 17:45:53,639 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:45:53,640 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:45:53,640 INFO L175 Difference]: Start difference. First operand has 52 places, 53 transitions, 184 flow. Second operand 3 states and 313 transitions. [2023-01-27 17:45:53,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 69 transitions, 310 flow [2023-01-27 17:45:53,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 69 transitions, 310 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-27 17:45:53,653 INFO L231 Difference]: Finished difference. Result has 55 places, 53 transitions, 200 flow [2023-01-27 17:45:53,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=200, PETRI_PLACES=55, PETRI_TRANSITIONS=53} [2023-01-27 17:45:53,654 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 5 predicate places. [2023-01-27 17:45:53,654 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 53 transitions, 200 flow [2023-01-27 17:45:53,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 91.33333333333333) internal successors, (274), 3 states have internal predecessors, (274), 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) [2023-01-27 17:45:53,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:45:53,654 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 17:45:53,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-01-27 17:45:53,655 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)] === [2023-01-27 17:45:53,655 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:45:53,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1547960262, now seen corresponding path program 2 times [2023-01-27 17:45:53,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:45:53,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245100947] [2023-01-27 17:45:53,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:45:53,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:45:53,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 17:45:53,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 17:45:53,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 17:45:53,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245100947] [2023-01-27 17:45:53,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245100947] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 17:45:53,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 17:45:53,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-27 17:45:53,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702834302] [2023-01-27 17:45:53,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 17:45:53,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-27 17:45:53,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 17:45:53,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-27 17:45:53,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-01-27 17:45:53,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 171 [2023-01-27 17:45:53,729 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 53 transitions, 200 flow. Second operand has 4 states, 4 states have (on average 92.75) internal successors, (371), 4 states have internal predecessors, (371), 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) [2023-01-27 17:45:53,729 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 17:45:53,729 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 171 [2023-01-27 17:45:53,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 17:45:54,004 INFO L130 PetriNetUnfolder]: 1378/3038 cut-off events. [2023-01-27 17:45:54,004 INFO L131 PetriNetUnfolder]: For 2119/2156 co-relation queries the response was YES. [2023-01-27 17:45:54,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7163 conditions, 3038 events. 1378/3038 cut-off events. For 2119/2156 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 24605 event pairs, 358 based on Foata normal form. 215/2923 useless extension candidates. Maximal degree in co-relation 5162. Up to 1013 conditions per place. [2023-01-27 17:45:54,019 INFO L137 encePairwiseOnDemand]: 164/171 looper letters, 52 selfloop transitions, 9 changer transitions 5/93 dead transitions. [2023-01-27 17:45:54,020 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 93 transitions, 452 flow [2023-01-27 17:45:54,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-27 17:45:54,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-27 17:45:54,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 432 transitions. [2023-01-27 17:45:54,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.631578947368421 [2023-01-27 17:45:54,022 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 432 transitions. [2023-01-27 17:45:54,022 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 432 transitions. [2023-01-27 17:45:54,022 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 17:45:54,022 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 432 transitions. [2023-01-27 17:45:54,023 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 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) [2023-01-27 17:45:54,025 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 171.0) internal successors, (855), 5 states have internal predecessors, (855), 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) [2023-01-27 17:45:54,025 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 171.0) internal successors, (855), 5 states have internal predecessors, (855), 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) [2023-01-27 17:45:54,025 INFO L175 Difference]: Start difference. First operand has 55 places, 53 transitions, 200 flow. Second operand 4 states and 432 transitions. [2023-01-27 17:45:54,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 93 transitions, 452 flow [2023-01-27 17:45:54,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 93 transitions, 436 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-01-27 17:45:54,035 INFO L231 Difference]: Finished difference. Result has 59 places, 59 transitions, 258 flow [2023-01-27 17:45:54,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=258, PETRI_PLACES=59, PETRI_TRANSITIONS=59} [2023-01-27 17:45:54,037 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 9 predicate places. [2023-01-27 17:45:54,039 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 59 transitions, 258 flow [2023-01-27 17:45:54,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 92.75) internal successors, (371), 4 states have internal predecessors, (371), 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) [2023-01-27 17:45:54,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:45:54,040 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 17:45:54,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-01-27 17:45:54,040 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)] === [2023-01-27 17:45:54,040 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:45:54,041 INFO L85 PathProgramCache]: Analyzing trace with hash -1560868813, now seen corresponding path program 1 times [2023-01-27 17:45:54,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:45:54,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111217107] [2023-01-27 17:45:54,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:45:54,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:45:54,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 17:45:54,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 17:45:54,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 17:45:54,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111217107] [2023-01-27 17:45:54,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111217107] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 17:45:54,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 17:45:54,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-27 17:45:54,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035754018] [2023-01-27 17:45:54,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 17:45:54,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-27 17:45:54,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 17:45:54,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-27 17:45:54,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-01-27 17:45:54,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 171 [2023-01-27 17:45:54,143 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 59 transitions, 258 flow. Second operand has 5 states, 5 states have (on average 79.6) internal successors, (398), 5 states have internal predecessors, (398), 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) [2023-01-27 17:45:54,143 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 17:45:54,144 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 171 [2023-01-27 17:45:54,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 17:45:54,812 INFO L130 PetriNetUnfolder]: 3858/6669 cut-off events. [2023-01-27 17:45:54,812 INFO L131 PetriNetUnfolder]: For 6248/6248 co-relation queries the response was YES. [2023-01-27 17:45:54,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19094 conditions, 6669 events. 3858/6669 cut-off events. For 6248/6248 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 43437 event pairs, 831 based on Foata normal form. 0/6465 useless extension candidates. Maximal degree in co-relation 14955. Up to 2733 conditions per place. [2023-01-27 17:45:54,843 INFO L137 encePairwiseOnDemand]: 162/171 looper letters, 131 selfloop transitions, 36 changer transitions 17/184 dead transitions. [2023-01-27 17:45:54,843 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 184 transitions, 1166 flow [2023-01-27 17:45:54,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-01-27 17:45:54,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-01-27 17:45:54,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 680 transitions. [2023-01-27 17:45:54,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5680868838763575 [2023-01-27 17:45:54,846 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 680 transitions. [2023-01-27 17:45:54,846 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 680 transitions. [2023-01-27 17:45:54,846 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 17:45:54,846 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 680 transitions. [2023-01-27 17:45:54,848 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 97.14285714285714) internal successors, (680), 7 states have internal predecessors, (680), 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) [2023-01-27 17:45:54,850 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 171.0) internal successors, (1368), 8 states have internal predecessors, (1368), 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) [2023-01-27 17:45:54,851 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 171.0) internal successors, (1368), 8 states have internal predecessors, (1368), 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) [2023-01-27 17:45:54,851 INFO L175 Difference]: Start difference. First operand has 59 places, 59 transitions, 258 flow. Second operand 7 states and 680 transitions. [2023-01-27 17:45:54,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 184 transitions, 1166 flow [2023-01-27 17:45:54,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 184 transitions, 1166 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-01-27 17:45:54,868 INFO L231 Difference]: Finished difference. Result has 69 places, 84 transitions, 516 flow [2023-01-27 17:45:54,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=516, PETRI_PLACES=69, PETRI_TRANSITIONS=84} [2023-01-27 17:45:54,869 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 19 predicate places. [2023-01-27 17:45:54,869 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 84 transitions, 516 flow [2023-01-27 17:45:54,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 79.6) internal successors, (398), 5 states have internal predecessors, (398), 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) [2023-01-27 17:45:54,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:45:54,870 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 17:45:54,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-01-27 17:45:54,870 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)] === [2023-01-27 17:45:54,870 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:45:54,871 INFO L85 PathProgramCache]: Analyzing trace with hash -472286317, now seen corresponding path program 1 times [2023-01-27 17:45:54,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:45:54,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392856602] [2023-01-27 17:45:54,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:45:54,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:45:54,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 17:45:54,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 17:45:54,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 17:45:54,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392856602] [2023-01-27 17:45:54,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392856602] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 17:45:54,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 17:45:54,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-27 17:45:54,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25771692] [2023-01-27 17:45:54,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 17:45:54,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-27 17:45:54,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 17:45:54,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-27 17:45:54,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-01-27 17:45:54,924 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 171 [2023-01-27 17:45:54,925 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 84 transitions, 516 flow. Second operand has 5 states, 5 states have (on average 80.2) internal successors, (401), 5 states have internal predecessors, (401), 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) [2023-01-27 17:45:54,925 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 17:45:54,925 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 171 [2023-01-27 17:45:54,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 17:45:55,554 INFO L130 PetriNetUnfolder]: 3306/5825 cut-off events. [2023-01-27 17:45:55,555 INFO L131 PetriNetUnfolder]: For 7921/7921 co-relation queries the response was YES. [2023-01-27 17:45:55,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18862 conditions, 5825 events. 3306/5825 cut-off events. For 7921/7921 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 37754 event pairs, 701 based on Foata normal form. 58/5883 useless extension candidates. Maximal degree in co-relation 16220. Up to 2373 conditions per place. [2023-01-27 17:45:55,588 INFO L137 encePairwiseOnDemand]: 163/171 looper letters, 113 selfloop transitions, 38 changer transitions 5/156 dead transitions. [2023-01-27 17:45:55,588 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 156 transitions, 1142 flow [2023-01-27 17:45:55,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-27 17:45:55,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-27 17:45:55,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 576 transitions. [2023-01-27 17:45:55,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5614035087719298 [2023-01-27 17:45:55,591 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 576 transitions. [2023-01-27 17:45:55,591 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 576 transitions. [2023-01-27 17:45:55,591 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 17:45:55,591 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 576 transitions. [2023-01-27 17:45:55,593 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 96.0) internal successors, (576), 6 states have internal predecessors, (576), 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) [2023-01-27 17:45:55,594 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 171.0) internal successors, (1197), 7 states have internal predecessors, (1197), 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) [2023-01-27 17:45:55,595 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 171.0) internal successors, (1197), 7 states have internal predecessors, (1197), 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) [2023-01-27 17:45:55,595 INFO L175 Difference]: Start difference. First operand has 69 places, 84 transitions, 516 flow. Second operand 6 states and 576 transitions. [2023-01-27 17:45:55,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 156 transitions, 1142 flow [2023-01-27 17:45:55,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 156 transitions, 1128 flow, removed 7 selfloop flow, removed 0 redundant places. [2023-01-27 17:45:55,621 INFO L231 Difference]: Finished difference. Result has 75 places, 87 transitions, 634 flow [2023-01-27 17:45:55,622 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=510, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=634, PETRI_PLACES=75, PETRI_TRANSITIONS=87} [2023-01-27 17:45:55,622 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 25 predicate places. [2023-01-27 17:45:55,622 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 87 transitions, 634 flow [2023-01-27 17:45:55,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 80.2) internal successors, (401), 5 states have internal predecessors, (401), 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) [2023-01-27 17:45:55,623 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:45:55,623 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-27 17:45:55,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-01-27 17:45:55,623 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)] === [2023-01-27 17:45:55,624 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:45:55,624 INFO L85 PathProgramCache]: Analyzing trace with hash -486096312, now seen corresponding path program 1 times [2023-01-27 17:45:55,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:45:55,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378420200] [2023-01-27 17:45:55,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:45:55,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:45:55,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 17:45:55,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 17:45:55,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 17:45:55,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378420200] [2023-01-27 17:45:55,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378420200] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 17:45:55,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 17:45:55,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-27 17:45:55,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766953514] [2023-01-27 17:45:55,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 17:45:55,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-27 17:45:55,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 17:45:55,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-27 17:45:55,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-01-27 17:45:55,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 171 [2023-01-27 17:45:55,682 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 87 transitions, 634 flow. Second operand has 5 states, 5 states have (on average 80.2) internal successors, (401), 5 states have internal predecessors, (401), 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) [2023-01-27 17:45:55,682 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 17:45:55,682 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 171 [2023-01-27 17:45:55,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 17:45:56,342 INFO L130 PetriNetUnfolder]: 3200/5653 cut-off events. [2023-01-27 17:45:56,342 INFO L131 PetriNetUnfolder]: For 9412/9412 co-relation queries the response was YES. [2023-01-27 17:45:56,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19230 conditions, 5653 events. 3200/5653 cut-off events. For 9412/9412 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 36924 event pairs, 723 based on Foata normal form. 66/5719 useless extension candidates. Maximal degree in co-relation 17043. Up to 2353 conditions per place. [2023-01-27 17:45:56,378 INFO L137 encePairwiseOnDemand]: 163/171 looper letters, 118 selfloop transitions, 39 changer transitions 7/164 dead transitions. [2023-01-27 17:45:56,378 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 164 transitions, 1281 flow [2023-01-27 17:45:56,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-27 17:45:56,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-27 17:45:56,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 583 transitions. [2023-01-27 17:45:56,380 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5682261208576999 [2023-01-27 17:45:56,381 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 583 transitions. [2023-01-27 17:45:56,381 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 583 transitions. [2023-01-27 17:45:56,381 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 17:45:56,381 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 583 transitions. [2023-01-27 17:45:56,383 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 97.16666666666667) internal successors, (583), 6 states have internal predecessors, (583), 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) [2023-01-27 17:45:56,384 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 171.0) internal successors, (1197), 7 states have internal predecessors, (1197), 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) [2023-01-27 17:45:56,385 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 171.0) internal successors, (1197), 7 states have internal predecessors, (1197), 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) [2023-01-27 17:45:56,385 INFO L175 Difference]: Start difference. First operand has 75 places, 87 transitions, 634 flow. Second operand 6 states and 583 transitions. [2023-01-27 17:45:56,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 164 transitions, 1281 flow [2023-01-27 17:45:56,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 164 transitions, 1220 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-01-27 17:45:56,429 INFO L231 Difference]: Finished difference. Result has 79 places, 90 transitions, 707 flow [2023-01-27 17:45:56,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=582, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=707, PETRI_PLACES=79, PETRI_TRANSITIONS=90} [2023-01-27 17:45:56,429 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 29 predicate places. [2023-01-27 17:45:56,430 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 90 transitions, 707 flow [2023-01-27 17:45:56,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 80.2) internal successors, (401), 5 states have internal predecessors, (401), 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) [2023-01-27 17:45:56,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:45:56,430 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] [2023-01-27 17:45:56,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-01-27 17:45:56,430 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)] === [2023-01-27 17:45:56,431 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:45:56,431 INFO L85 PathProgramCache]: Analyzing trace with hash -184054503, now seen corresponding path program 1 times [2023-01-27 17:45:56,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:45:56,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391009653] [2023-01-27 17:45:56,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:45:56,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:45:56,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 17:45:56,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 17:45:56,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 17:45:56,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391009653] [2023-01-27 17:45:56,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391009653] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 17:45:56,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 17:45:56,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-27 17:45:56,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638674199] [2023-01-27 17:45:56,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 17:45:56,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-27 17:45:56,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 17:45:56,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-27 17:45:56,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-01-27 17:45:56,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 171 [2023-01-27 17:45:56,528 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 90 transitions, 707 flow. Second operand has 5 states, 5 states have (on average 93.6) internal successors, (468), 5 states have internal predecessors, (468), 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) [2023-01-27 17:45:56,528 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 17:45:56,528 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 171 [2023-01-27 17:45:56,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 17:45:56,809 INFO L130 PetriNetUnfolder]: 625/2070 cut-off events. [2023-01-27 17:45:56,809 INFO L131 PetriNetUnfolder]: For 4540/4689 co-relation queries the response was YES. [2023-01-27 17:45:56,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6803 conditions, 2070 events. 625/2070 cut-off events. For 4540/4689 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 18158 event pairs, 269 based on Foata normal form. 197/2219 useless extension candidates. Maximal degree in co-relation 6428. Up to 728 conditions per place. [2023-01-27 17:45:56,822 INFO L137 encePairwiseOnDemand]: 164/171 looper letters, 38 selfloop transitions, 7 changer transitions 20/111 dead transitions. [2023-01-27 17:45:56,822 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 111 transitions, 814 flow [2023-01-27 17:45:56,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-27 17:45:56,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-27 17:45:56,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 515 transitions. [2023-01-27 17:45:56,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6023391812865497 [2023-01-27 17:45:56,824 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 515 transitions. [2023-01-27 17:45:56,824 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 515 transitions. [2023-01-27 17:45:56,824 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 17:45:56,824 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 515 transitions. [2023-01-27 17:45:56,825 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 103.0) internal successors, (515), 5 states have internal predecessors, (515), 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) [2023-01-27 17:45:56,826 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 171.0) internal successors, (1026), 6 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:45:56,827 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 171.0) internal successors, (1026), 6 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:45:56,827 INFO L175 Difference]: Start difference. First operand has 79 places, 90 transitions, 707 flow. Second operand 5 states and 515 transitions. [2023-01-27 17:45:56,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 111 transitions, 814 flow [2023-01-27 17:45:56,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 111 transitions, 771 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-01-27 17:45:56,848 INFO L231 Difference]: Finished difference. Result has 81 places, 75 transitions, 520 flow [2023-01-27 17:45:56,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=572, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=520, PETRI_PLACES=81, PETRI_TRANSITIONS=75} [2023-01-27 17:45:56,849 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 31 predicate places. [2023-01-27 17:45:56,849 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 75 transitions, 520 flow [2023-01-27 17:45:56,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 93.6) internal successors, (468), 5 states have internal predecessors, (468), 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) [2023-01-27 17:45:56,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-27 17:45:56,850 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] [2023-01-27 17:45:56,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-01-27 17:45:56,850 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2023-01-27 17:45:56,850 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-27 17:45:56,850 INFO L85 PathProgramCache]: Analyzing trace with hash -1690172749, now seen corresponding path program 2 times [2023-01-27 17:45:56,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-27 17:45:56,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127554142] [2023-01-27 17:45:56,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-27 17:45:56,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-27 17:45:56,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-27 17:45:56,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-27 17:45:56,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-27 17:45:56,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127554142] [2023-01-27 17:45:56,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127554142] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-27 17:45:56,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-27 17:45:56,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-01-27 17:45:56,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007394172] [2023-01-27 17:45:56,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-27 17:45:56,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-01-27 17:45:56,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-27 17:45:56,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-01-27 17:45:56,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-01-27 17:45:56,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 171 [2023-01-27 17:45:56,951 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 75 transitions, 520 flow. Second operand has 5 states, 5 states have (on average 93.6) internal successors, (468), 5 states have internal predecessors, (468), 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) [2023-01-27 17:45:56,951 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-27 17:45:56,951 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 171 [2023-01-27 17:45:56,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-27 17:45:57,076 INFO L130 PetriNetUnfolder]: 260/983 cut-off events. [2023-01-27 17:45:57,076 INFO L131 PetriNetUnfolder]: For 2558/2558 co-relation queries the response was YES. [2023-01-27 17:45:57,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3354 conditions, 983 events. 260/983 cut-off events. For 2558/2558 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 7018 event pairs, 100 based on Foata normal form. 22/993 useless extension candidates. Maximal degree in co-relation 3332. Up to 289 conditions per place. [2023-01-27 17:45:57,082 INFO L137 encePairwiseOnDemand]: 164/171 looper letters, 0 selfloop transitions, 0 changer transitions 71/71 dead transitions. [2023-01-27 17:45:57,083 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 71 transitions, 450 flow [2023-01-27 17:45:57,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-01-27 17:45:57,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-01-27 17:45:57,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 506 transitions. [2023-01-27 17:45:57,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.591812865497076 [2023-01-27 17:45:57,088 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 506 transitions. [2023-01-27 17:45:57,088 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 506 transitions. [2023-01-27 17:45:57,089 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-27 17:45:57,089 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 506 transitions. [2023-01-27 17:45:57,090 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 101.2) internal successors, (506), 5 states have internal predecessors, (506), 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) [2023-01-27 17:45:57,091 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 171.0) internal successors, (1026), 6 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:45:57,091 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 171.0) internal successors, (1026), 6 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-27 17:45:57,092 INFO L175 Difference]: Start difference. First operand has 81 places, 75 transitions, 520 flow. Second operand 5 states and 506 transitions. [2023-01-27 17:45:57,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 71 transitions, 450 flow [2023-01-27 17:45:57,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 71 transitions, 382 flow, removed 1 selfloop flow, removed 16 redundant places. [2023-01-27 17:45:57,102 INFO L231 Difference]: Finished difference. Result has 64 places, 0 transitions, 0 flow [2023-01-27 17:45:57,102 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=64, PETRI_TRANSITIONS=0} [2023-01-27 17:45:57,105 INFO L281 CegarLoopForPetriNet]: 50 programPoint places, 14 predicate places. [2023-01-27 17:45:57,105 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 0 transitions, 0 flow [2023-01-27 17:45:57,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 93.6) internal successors, (468), 5 states have internal predecessors, (468), 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) [2023-01-27 17:45:57,108 INFO L805 garLoopResultBuilder]: Registering result SAFE for location readerErr0ASSERT_VIOLATIONERROR_FUNCTION (6 of 7 remaining) [2023-01-27 17:45:57,109 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 7 remaining) [2023-01-27 17:45:57,109 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 7 remaining) [2023-01-27 17:45:57,109 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 7 remaining) [2023-01-27 17:45:57,109 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 7 remaining) [2023-01-27 17:45:57,109 INFO L805 garLoopResultBuilder]: Registering result SAFE for location readerErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2023-01-27 17:45:57,109 INFO L805 garLoopResultBuilder]: Registering result SAFE for location readerErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2023-01-27 17:45:57,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-01-27 17:45:57,110 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1] [2023-01-27 17:45:57,115 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-01-27 17:45:57,115 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-01-27 17:45:57,125 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.01 05:45:57 BasicIcfg [2023-01-27 17:45:57,125 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-01-27 17:45:57,126 INFO L158 Benchmark]: Toolchain (without parser) took 11024.50ms. Allocated memory was 350.2MB in the beginning and 1.3GB in the end (delta: 989.9MB). Free memory was 289.7MB in the beginning and 494.2MB in the end (delta: -204.5MB). Peak memory consumption was 786.7MB. Max. memory is 16.0GB. [2023-01-27 17:45:57,126 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 350.2MB. Free memory is still 296.8MB. There was no memory consumed. Max. memory is 16.0GB. [2023-01-27 17:45:57,126 INFO L158 Benchmark]: CACSL2BoogieTranslator took 441.04ms. Allocated memory is still 350.2MB. Free memory was 289.4MB in the beginning and 269.6MB in the end (delta: 19.8MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. [2023-01-27 17:45:57,126 INFO L158 Benchmark]: Boogie Procedure Inliner took 46.78ms. Allocated memory is still 350.2MB. Free memory was 269.6MB in the beginning and 267.3MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-27 17:45:57,126 INFO L158 Benchmark]: Boogie Preprocessor took 24.14ms. Allocated memory is still 350.2MB. Free memory was 267.3MB in the beginning and 265.8MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-27 17:45:57,127 INFO L158 Benchmark]: RCFGBuilder took 567.20ms. Allocated memory was 350.2MB in the beginning and 518.0MB in the end (delta: 167.8MB). Free memory was 265.8MB in the beginning and 471.0MB in the end (delta: -205.2MB). Peak memory consumption was 8.8MB. Max. memory is 16.0GB. [2023-01-27 17:45:57,127 INFO L158 Benchmark]: TraceAbstraction took 9939.27ms. Allocated memory was 518.0MB in the beginning and 1.3GB in the end (delta: 822.1MB). Free memory was 469.9MB in the beginning and 494.2MB in the end (delta: -24.3MB). Peak memory consumption was 798.9MB. Max. memory is 16.0GB. [2023-01-27 17:45:57,128 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 350.2MB. Free memory is still 296.8MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 441.04ms. Allocated memory is still 350.2MB. Free memory was 289.4MB in the beginning and 269.6MB in the end (delta: 19.8MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 46.78ms. Allocated memory is still 350.2MB. Free memory was 269.6MB in the beginning and 267.3MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 24.14ms. Allocated memory is still 350.2MB. Free memory was 267.3MB in the beginning and 265.8MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 567.20ms. Allocated memory was 350.2MB in the beginning and 518.0MB in the end (delta: 167.8MB). Free memory was 265.8MB in the beginning and 471.0MB in the end (delta: -205.2MB). Peak memory consumption was 8.8MB. Max. memory is 16.0GB. * TraceAbstraction took 9939.27ms. Allocated memory was 518.0MB in the beginning and 1.3GB in the end (delta: 822.1MB). Free memory was 469.9MB in the beginning and 494.2MB in the end (delta: -24.3MB). Peak memory consumption was 798.9MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.0s, 102 PlacesBefore, 50 PlacesAfterwards, 91 TransitionsBefore, 39 TransitionsAfterwards, 2408 CoEnabledTransitionPairs, 6 FixpointIterations, 19 TrivialSequentialCompositions, 37 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 7 ConcurrentYvCompositions, 0 ChoiceCompositions, 63 TotalNumberOfCompositions, 8945 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 6167, independent: 5913, independent conditional: 0, independent unconditional: 5913, dependent: 254, dependent conditional: 0, dependent unconditional: 254, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1392, independent: 1358, independent conditional: 0, independent unconditional: 1358, dependent: 34, dependent conditional: 0, dependent unconditional: 34, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 6167, independent: 4555, independent conditional: 0, independent unconditional: 4555, dependent: 220, dependent conditional: 0, dependent unconditional: 220, unknown: 1392, unknown conditional: 0, unknown unconditional: 1392] , Statistics on independence cache: Total cache size (in pairs): 309, Positive cache size: 286, Positive conditional cache size: 0, Positive unconditional cache size: 286, Negative cache size: 23, Negative conditional cache size: 0, Negative unconditional cache size: 23, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 739]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 132 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: 9.8s, OverallIterations: 8, TraceHistogramMax: 1, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 5.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 476 SdHoareTripleChecker+Valid, 0.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 476 mSDsluCounter, 69 SdHoareTripleChecker+Invalid, 0.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 24 mSDsCounter, 28 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1311 IncrementalHoareTripleChecker+Invalid, 1339 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 28 mSolverCounterUnsat, 45 mSDtfsCounter, 1311 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 44 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=707occurred in iteration=6, InterpolantAutomatonStates: 43, 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, 0.6s InterpolantComputationTime, 118 NumberOfCodeBlocks, 118 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 110 ConstructedInterpolants, 0 QuantifiedInterpolants, 220 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-01-27 17:45:57,145 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...