/usr/bin/java -Xmx8000000000 -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-NoLbe.epf --traceabstraction.use.on-demand.petri.net.difference true -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread-atomic/read_write_lock-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.repeated-lipton-8d0d62b [2022-12-06 16:15:23,052 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-06 16:15:23,054 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-06 16:15:23,096 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-06 16:15:23,096 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-06 16:15:23,099 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-06 16:15:23,102 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-06 16:15:23,106 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-06 16:15:23,107 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-06 16:15:23,112 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-06 16:15:23,113 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-06 16:15:23,115 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-06 16:15:23,115 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-06 16:15:23,117 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-06 16:15:23,118 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-06 16:15:23,118 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-06 16:15:23,119 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-06 16:15:23,119 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-06 16:15:23,122 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-06 16:15:23,126 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-06 16:15:23,127 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-06 16:15:23,128 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-06 16:15:23,129 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-06 16:15:23,130 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-06 16:15:23,135 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-06 16:15:23,135 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-06 16:15:23,135 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-06 16:15:23,136 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-06 16:15:23,137 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-06 16:15:23,137 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-06 16:15:23,138 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-06 16:15:23,138 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-06 16:15:23,139 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-06 16:15:23,140 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-06 16:15:23,140 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-06 16:15:23,141 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-06 16:15:23,141 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-06 16:15:23,141 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-06 16:15:23,141 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-06 16:15:23,142 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-06 16:15:23,142 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-06 16:15:23,143 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-NoLbe.epf [2022-12-06 16:15:23,170 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-06 16:15:23,170 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-06 16:15:23,171 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-06 16:15:23,171 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-06 16:15:23,172 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-06 16:15:23,172 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-06 16:15:23,172 INFO L138 SettingsManager]: * Use SBE=true [2022-12-06 16:15:23,172 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-06 16:15:23,172 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-06 16:15:23,173 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-06 16:15:23,173 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-06 16:15:23,173 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-06 16:15:23,173 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-06 16:15:23,173 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-06 16:15:23,174 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-06 16:15:23,174 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-06 16:15:23,174 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-06 16:15:23,174 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-06 16:15:23,174 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-06 16:15:23,174 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-06 16:15:23,174 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-06 16:15:23,174 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-12-06 16:15:23,174 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-06 16:15:23,174 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-06 16:15:23,175 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-06 16:15:23,175 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-06 16:15:23,175 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-06 16:15:23,175 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-06 16:15:23,175 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-06 16:15:23,175 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-12-06 16:15:23,175 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-06 16:15:23,175 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use on-demand Petri net difference -> true [2022-12-06 16:15:23,436 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-06 16:15:23,450 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-06 16:15:23,452 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-06 16:15:23,453 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-06 16:15:23,454 INFO L275 PluginConnector]: CDTParser initialized [2022-12-06 16:15:23,455 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-atomic/read_write_lock-2.i [2022-12-06 16:15:24,462 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-06 16:15:24,692 INFO L351 CDTParser]: Found 1 translation units. [2022-12-06 16:15:24,692 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-atomic/read_write_lock-2.i [2022-12-06 16:15:24,700 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/86171ef4d/179ec962339d4a0293b683c826f9fe6e/FLAGed04ae0b3 [2022-12-06 16:15:25,025 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/86171ef4d/179ec962339d4a0293b683c826f9fe6e [2022-12-06 16:15:25,026 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-06 16:15:25,027 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-12-06 16:15:25,028 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-06 16:15:25,028 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-06 16:15:25,030 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-06 16:15:25,030 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 04:15:25" (1/1) ... [2022-12-06 16:15:25,031 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3577206a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 04:15:25, skipping insertion in model container [2022-12-06 16:15:25,031 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 04:15:25" (1/1) ... [2022-12-06 16:15:25,035 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-06 16:15:25,074 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-06 16:15:25,225 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-12-06 16:15:25,333 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-06 16:15:25,334 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-06 16:15:25,334 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-06 16:15:25,334 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-06 16:15:25,335 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-06 16:15:25,336 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-06 16:15:25,336 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-06 16:15:25,336 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-06 16:15:25,336 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-06 16:15:25,337 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-06 16:15:25,337 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-06 16:15:25,337 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-06 16:15:25,338 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-atomic/read_write_lock-2.i[31244,31257] [2022-12-06 16:15:25,341 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-06 16:15:25,342 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-06 16:15:25,342 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-06 16:15:25,343 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-06 16:15:25,351 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-06 16:15:25,360 INFO L203 MainTranslator]: Completed pre-run [2022-12-06 16:15:25,381 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-12-06 16:15:25,397 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-06 16:15:25,397 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-06 16:15:25,397 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-06 16:15:25,398 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-06 16:15:25,398 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-06 16:15:25,399 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-06 16:15:25,399 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-06 16:15:25,399 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-06 16:15:25,400 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-06 16:15:25,401 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-06 16:15:25,401 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-06 16:15:25,401 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-06 16:15:25,402 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-atomic/read_write_lock-2.i[31244,31257] [2022-12-06 16:15:25,403 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-06 16:15:25,403 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-06 16:15:25,403 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-06 16:15:25,403 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-06 16:15:25,410 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-06 16:15:25,440 INFO L208 MainTranslator]: Completed translation [2022-12-06 16:15:25,441 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 04:15:25 WrapperNode [2022-12-06 16:15:25,441 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-06 16:15:25,442 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-06 16:15:25,442 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-06 16:15:25,442 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-06 16:15:25,447 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 04:15:25" (1/1) ... [2022-12-06 16:15:25,472 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 04:15:25" (1/1) ... [2022-12-06 16:15:25,492 INFO L138 Inliner]: procedures = 174, calls = 51, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 119 [2022-12-06 16:15:25,493 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-06 16:15:25,493 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-06 16:15:25,493 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-06 16:15:25,494 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-06 16:15:25,499 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 04:15:25" (1/1) ... [2022-12-06 16:15:25,500 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 04:15:25" (1/1) ... [2022-12-06 16:15:25,513 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 04:15:25" (1/1) ... [2022-12-06 16:15:25,513 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 04:15:25" (1/1) ... [2022-12-06 16:15:25,516 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 04:15:25" (1/1) ... [2022-12-06 16:15:25,518 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 04:15:25" (1/1) ... [2022-12-06 16:15:25,519 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 04:15:25" (1/1) ... [2022-12-06 16:15:25,519 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 04:15:25" (1/1) ... [2022-12-06 16:15:25,521 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-06 16:15:25,522 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-06 16:15:25,522 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-06 16:15:25,522 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-06 16:15:25,522 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 04:15:25" (1/1) ... [2022-12-06 16:15:25,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-06 16:15:25,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-12-06 16:15:25,570 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-06 16:15:25,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-06 16:15:25,615 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-06 16:15:25,615 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-06 16:15:25,615 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-06 16:15:25,615 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-06 16:15:25,615 INFO L130 BoogieDeclarations]: Found specification of procedure reader [2022-12-06 16:15:25,616 INFO L138 BoogieDeclarations]: Found implementation of procedure reader [2022-12-06 16:15:25,616 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-06 16:15:25,616 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-06 16:15:25,616 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-06 16:15:25,616 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-06 16:15:25,616 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-06 16:15:25,616 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-06 16:15:25,616 INFO L130 BoogieDeclarations]: Found specification of procedure writer [2022-12-06 16:15:25,616 INFO L138 BoogieDeclarations]: Found implementation of procedure writer [2022-12-06 16:15:25,618 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2022-12-06 16:15:25,769 INFO L236 CfgBuilder]: Building ICFG [2022-12-06 16:15:25,770 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-06 16:15:25,907 INFO L277 CfgBuilder]: Performing block encoding [2022-12-06 16:15:25,933 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-06 16:15:25,933 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2022-12-06 16:15:25,935 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 04:15:25 BoogieIcfgContainer [2022-12-06 16:15:25,935 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-06 16:15:25,937 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-06 16:15:25,937 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-06 16:15:25,939 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-06 16:15:25,939 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 04:15:25" (1/3) ... [2022-12-06 16:15:25,939 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2504d62a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 04:15:25, skipping insertion in model container [2022-12-06 16:15:25,940 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 04:15:25" (2/3) ... [2022-12-06 16:15:25,940 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2504d62a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 04:15:25, skipping insertion in model container [2022-12-06 16:15:25,940 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 04:15:25" (3/3) ... [2022-12-06 16:15:25,941 INFO L112 eAbstractionObserver]: Analyzing ICFG read_write_lock-2.i [2022-12-06 16:15:25,953 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-06 16:15:25,953 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-06 16:15:25,953 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-06 16:15:26,047 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-12-06 16:15:26,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 121 places, 110 transitions, 252 flow [2022-12-06 16:15:26,144 INFO L130 PetriNetUnfolder]: 2/106 cut-off events. [2022-12-06 16:15:26,144 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-12-06 16:15:26,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123 conditions, 106 events. 2/106 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 96 event pairs, 0 based on Foata normal form. 0/102 useless extension candidates. Maximal degree in co-relation 71. Up to 2 conditions per place. [2022-12-06 16:15:26,148 INFO L82 GeneralOperation]: Start removeDead. Operand has 121 places, 110 transitions, 252 flow [2022-12-06 16:15:26,152 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 104 places, 93 transitions, 207 flow [2022-12-06 16:15:26,163 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-06 16:15:26,168 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;@3790bd14, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, Conditionality=CONDITIONAL_DISJUNCTIVE, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-06 16:15:26,169 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-12-06 16:15:26,189 INFO L130 PetriNetUnfolder]: 1/56 cut-off events. [2022-12-06 16:15:26,189 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-06 16:15:26,189 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-06 16:15:26,190 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-06 16:15:26,190 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-06 16:15:26,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-06 16:15:26,194 INFO L85 PathProgramCache]: Analyzing trace with hash 1181809175, now seen corresponding path program 1 times [2022-12-06 16:15:26,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-06 16:15:26,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675919489] [2022-12-06 16:15:26,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-06 16:15:26,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-06 16:15:26,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-06 16:15:26,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 16:15:26,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-06 16:15:26,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675919489] [2022-12-06 16:15:26,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675919489] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-06 16:15:26,515 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-06 16:15:26,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-06 16:15:26,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460031037] [2022-12-06 16:15:26,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-06 16:15:26,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-06 16:15:26,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-06 16:15:26,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-06 16:15:26,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-06 16:15:26,546 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 110 [2022-12-06 16:15:26,549 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 93 transitions, 207 flow. Second operand has 6 states, 6 states have (on average 80.83333333333333) internal successors, (485), 6 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-06 16:15:26,549 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-06 16:15:26,549 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 110 [2022-12-06 16:15:26,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-06 16:15:27,484 INFO L130 PetriNetUnfolder]: 3525/7707 cut-off events. [2022-12-06 16:15:27,486 INFO L131 PetriNetUnfolder]: For 1654/1654 co-relation queries the response was YES. [2022-12-06 16:15:27,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13861 conditions, 7707 events. 3525/7707 cut-off events. For 1654/1654 co-relation queries the response was YES. Maximal size of possible extension queue 558. Compared 71405 event pairs, 957 based on Foata normal form. 422/7821 useless extension candidates. Maximal degree in co-relation 13400. Up to 1729 conditions per place. [2022-12-06 16:15:27,545 INFO L137 encePairwiseOnDemand]: 98/110 looper letters, 116 selfloop transitions, 32 changer transitions 0/211 dead transitions. [2022-12-06 16:15:27,545 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 211 transitions, 817 flow [2022-12-06 16:15:27,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-06 16:15:27,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-06 16:15:27,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1112 transitions. [2022-12-06 16:15:27,605 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.8424242424242424 [2022-12-06 16:15:27,610 INFO L294 CegarLoopForPetriNet]: 104 programPoint places, 11 predicate places. [2022-12-06 16:15:27,610 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 211 transitions, 817 flow [2022-12-06 16:15:27,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 80.83333333333333) internal successors, (485), 6 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-06 16:15:27,611 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-06 16:15:27,611 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-06 16:15:27,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-06 16:15:27,613 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-06 16:15:27,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-06 16:15:27,615 INFO L85 PathProgramCache]: Analyzing trace with hash -1324933873, now seen corresponding path program 1 times [2022-12-06 16:15:27,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-06 16:15:27,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605203440] [2022-12-06 16:15:27,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-06 16:15:27,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-06 16:15:27,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-06 16:15:27,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 16:15:27,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-06 16:15:27,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605203440] [2022-12-06 16:15:27,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605203440] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-06 16:15:27,794 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-06 16:15:27,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-06 16:15:27,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821778571] [2022-12-06 16:15:27,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-06 16:15:27,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-06 16:15:27,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-06 16:15:27,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-06 16:15:27,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-06 16:15:27,796 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 110 [2022-12-06 16:15:27,796 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 211 transitions, 817 flow. Second operand has 3 states, 3 states have (on average 94.66666666666667) internal successors, (284), 3 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-06 16:15:27,796 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-06 16:15:27,796 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 110 [2022-12-06 16:15:27,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-06 16:15:28,447 INFO L130 PetriNetUnfolder]: 3675/8740 cut-off events. [2022-12-06 16:15:28,448 INFO L131 PetriNetUnfolder]: For 6351/6554 co-relation queries the response was YES. [2022-12-06 16:15:28,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18049 conditions, 8740 events. 3675/8740 cut-off events. For 6351/6554 co-relation queries the response was YES. Maximal size of possible extension queue 652. Compared 88459 event pairs, 876 based on Foata normal form. 810/9140 useless extension candidates. Maximal degree in co-relation 17343. Up to 1826 conditions per place. [2022-12-06 16:15:28,502 INFO L137 encePairwiseOnDemand]: 104/110 looper letters, 71 selfloop transitions, 24 changer transitions 0/240 dead transitions. [2022-12-06 16:15:28,502 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 240 transitions, 1210 flow [2022-12-06 16:15:28,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-06 16:15:28,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-06 16:15:28,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 302 transitions. [2022-12-06 16:15:28,504 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.9151515151515152 [2022-12-06 16:15:28,505 INFO L294 CegarLoopForPetriNet]: 104 programPoint places, 13 predicate places. [2022-12-06 16:15:28,506 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 240 transitions, 1210 flow [2022-12-06 16:15:28,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 94.66666666666667) internal successors, (284), 3 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-06 16:15:28,506 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-06 16:15:28,506 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-06 16:15:28,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-06 16:15:28,506 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-06 16:15:28,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-06 16:15:28,507 INFO L85 PathProgramCache]: Analyzing trace with hash -1566848441, now seen corresponding path program 2 times [2022-12-06 16:15:28,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-06 16:15:28,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299709104] [2022-12-06 16:15:28,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-06 16:15:28,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-06 16:15:28,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-06 16:15:28,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 16:15:28,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-06 16:15:28,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299709104] [2022-12-06 16:15:28,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299709104] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-06 16:15:28,603 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-06 16:15:28,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-06 16:15:28,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443316660] [2022-12-06 16:15:28,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-06 16:15:28,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-06 16:15:28,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-06 16:15:28,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-06 16:15:28,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-06 16:15:28,605 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 110 [2022-12-06 16:15:28,605 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 240 transitions, 1210 flow. Second operand has 4 states, 4 states have (on average 89.5) internal successors, (358), 4 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-06 16:15:28,605 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-06 16:15:28,605 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 110 [2022-12-06 16:15:28,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-06 16:15:29,569 INFO L130 PetriNetUnfolder]: 5283/11447 cut-off events. [2022-12-06 16:15:29,569 INFO L131 PetriNetUnfolder]: For 16058/16883 co-relation queries the response was YES. [2022-12-06 16:15:29,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28511 conditions, 11447 events. 5283/11447 cut-off events. For 16058/16883 co-relation queries the response was YES. Maximal size of possible extension queue 1016. Compared 115517 event pairs, 832 based on Foata normal form. 768/11687 useless extension candidates. Maximal degree in co-relation 26759. Up to 1924 conditions per place. [2022-12-06 16:15:29,645 INFO L137 encePairwiseOnDemand]: 101/110 looper letters, 124 selfloop transitions, 71 changer transitions 5/335 dead transitions. [2022-12-06 16:15:29,645 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 335 transitions, 2220 flow [2022-12-06 16:15:29,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-06 16:15:29,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-06 16:15:29,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 498 transitions. [2022-12-06 16:15:29,647 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.9054545454545454 [2022-12-06 16:15:29,647 INFO L294 CegarLoopForPetriNet]: 104 programPoint places, 17 predicate places. [2022-12-06 16:15:29,647 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 335 transitions, 2220 flow [2022-12-06 16:15:29,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 89.5) internal successors, (358), 4 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-06 16:15:29,648 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-06 16:15:29,648 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-06 16:15:29,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-06 16:15:29,648 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-06 16:15:29,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-06 16:15:29,649 INFO L85 PathProgramCache]: Analyzing trace with hash -901588045, now seen corresponding path program 1 times [2022-12-06 16:15:29,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-06 16:15:29,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453621515] [2022-12-06 16:15:29,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-06 16:15:29,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-06 16:15:29,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-06 16:15:29,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 16:15:29,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-06 16:15:29,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453621515] [2022-12-06 16:15:29,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453621515] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-06 16:15:29,713 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-06 16:15:29,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-06 16:15:29,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45436069] [2022-12-06 16:15:29,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-06 16:15:29,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-06 16:15:29,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-06 16:15:29,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-06 16:15:29,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-06 16:15:29,714 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 110 [2022-12-06 16:15:29,715 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 335 transitions, 2220 flow. Second operand has 6 states, 6 states have (on average 81.16666666666667) internal successors, (487), 6 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-06 16:15:29,715 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-06 16:15:29,715 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 110 [2022-12-06 16:15:29,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-06 16:15:32,198 INFO L130 PetriNetUnfolder]: 13851/27481 cut-off events. [2022-12-06 16:15:32,199 INFO L131 PetriNetUnfolder]: For 54665/56516 co-relation queries the response was YES. [2022-12-06 16:15:32,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85187 conditions, 27481 events. 13851/27481 cut-off events. For 54665/56516 co-relation queries the response was YES. Maximal size of possible extension queue 2612. Compared 296530 event pairs, 995 based on Foata normal form. 371/26646 useless extension candidates. Maximal degree in co-relation 49824. Up to 4844 conditions per place. [2022-12-06 16:15:32,351 INFO L137 encePairwiseOnDemand]: 100/110 looper letters, 701 selfloop transitions, 138 changer transitions 313/1242 dead transitions. [2022-12-06 16:15:32,351 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 1242 transitions, 11770 flow [2022-12-06 16:15:32,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-06 16:15:32,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-06 16:15:32,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1103 transitions. [2022-12-06 16:15:32,354 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.8356060606060606 [2022-12-06 16:15:32,355 INFO L294 CegarLoopForPetriNet]: 104 programPoint places, 28 predicate places. [2022-12-06 16:15:32,355 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 1242 transitions, 11770 flow [2022-12-06 16:15:32,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 81.16666666666667) internal successors, (487), 6 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-06 16:15:32,356 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-06 16:15:32,356 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-06 16:15:32,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-06 16:15:32,356 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-06 16:15:32,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-06 16:15:32,356 INFO L85 PathProgramCache]: Analyzing trace with hash -1594958595, now seen corresponding path program 1 times [2022-12-06 16:15:32,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-06 16:15:32,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531768156] [2022-12-06 16:15:32,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-06 16:15:32,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-06 16:15:32,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-06 16:15:32,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 16:15:32,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-06 16:15:32,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531768156] [2022-12-06 16:15:32,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531768156] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-06 16:15:32,439 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-06 16:15:32,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-06 16:15:32,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119162126] [2022-12-06 16:15:32,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-06 16:15:32,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-06 16:15:32,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-06 16:15:32,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-06 16:15:32,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-06 16:15:32,442 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 110 [2022-12-06 16:15:32,443 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 1242 transitions, 11770 flow. Second operand has 6 states, 6 states have (on average 81.66666666666667) internal successors, (490), 6 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-06 16:15:32,443 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-06 16:15:32,443 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 110 [2022-12-06 16:15:32,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-06 16:15:36,149 INFO L130 PetriNetUnfolder]: 14869/29139 cut-off events. [2022-12-06 16:15:36,149 INFO L131 PetriNetUnfolder]: For 75942/79583 co-relation queries the response was YES. [2022-12-06 16:15:36,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109074 conditions, 29139 events. 14869/29139 cut-off events. For 75942/79583 co-relation queries the response was YES. Maximal size of possible extension queue 2752. Compared 313830 event pairs, 941 based on Foata normal form. 400/28614 useless extension candidates. Maximal degree in co-relation 107492. Up to 5817 conditions per place. [2022-12-06 16:15:36,354 INFO L137 encePairwiseOnDemand]: 100/110 looper letters, 1012 selfloop transitions, 240 changer transitions 366/1708 dead transitions. [2022-12-06 16:15:36,354 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 1708 transitions, 19372 flow [2022-12-06 16:15:36,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-06 16:15:36,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-12-06 16:15:36,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1183 transitions. [2022-12-06 16:15:36,356 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.8272727272727273 [2022-12-06 16:15:36,357 INFO L294 CegarLoopForPetriNet]: 104 programPoint places, 40 predicate places. [2022-12-06 16:15:36,357 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 1708 transitions, 19372 flow [2022-12-06 16:15:36,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 81.66666666666667) internal successors, (490), 6 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-06 16:15:36,358 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-06 16:15:36,358 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-06 16:15:36,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-06 16:15:36,358 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-06 16:15:36,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-06 16:15:36,358 INFO L85 PathProgramCache]: Analyzing trace with hash 1426871899, now seen corresponding path program 1 times [2022-12-06 16:15:36,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-06 16:15:36,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751248543] [2022-12-06 16:15:36,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-06 16:15:36,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-06 16:15:36,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-06 16:15:36,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 16:15:36,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-06 16:15:36,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751248543] [2022-12-06 16:15:36,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751248543] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-06 16:15:36,446 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-06 16:15:36,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-06 16:15:36,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259611760] [2022-12-06 16:15:36,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-06 16:15:36,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-06 16:15:36,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-06 16:15:36,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-06 16:15:36,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-12-06 16:15:36,448 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 110 [2022-12-06 16:15:36,449 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 1708 transitions, 19372 flow. Second operand has 6 states, 6 states have (on average 81.66666666666667) internal successors, (490), 6 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-06 16:15:36,449 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-06 16:15:36,449 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 110 [2022-12-06 16:15:36,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-06 16:15:41,092 INFO L130 PetriNetUnfolder]: 15983/30944 cut-off events. [2022-12-06 16:15:41,092 INFO L131 PetriNetUnfolder]: For 100445/105801 co-relation queries the response was YES. [2022-12-06 16:15:41,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134598 conditions, 30944 events. 15983/30944 cut-off events. For 100445/105801 co-relation queries the response was YES. Maximal size of possible extension queue 2943. Compared 331450 event pairs, 769 based on Foata normal form. 517/30633 useless extension candidates. Maximal degree in co-relation 79307. Up to 6813 conditions per place. [2022-12-06 16:15:41,332 INFO L137 encePairwiseOnDemand]: 100/110 looper letters, 1309 selfloop transitions, 306 changer transitions 599/2346 dead transitions. [2022-12-06 16:15:41,332 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 2346 transitions, 31144 flow [2022-12-06 16:15:41,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-06 16:15:41,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-12-06 16:15:41,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1187 transitions. [2022-12-06 16:15:41,335 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.83006993006993 [2022-12-06 16:15:41,338 INFO L294 CegarLoopForPetriNet]: 104 programPoint places, 52 predicate places. [2022-12-06 16:15:41,338 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 2346 transitions, 31144 flow [2022-12-06 16:15:41,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 81.66666666666667) internal successors, (490), 6 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-06 16:15:41,338 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-06 16:15:41,338 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-06 16:15:41,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-06 16:15:41,339 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-06 16:15:41,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-06 16:15:41,339 INFO L85 PathProgramCache]: Analyzing trace with hash 1227147946, now seen corresponding path program 1 times [2022-12-06 16:15:41,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-06 16:15:41,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308430650] [2022-12-06 16:15:41,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-06 16:15:41,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-06 16:15:41,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-06 16:15:41,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 16:15:41,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-06 16:15:41,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308430650] [2022-12-06 16:15:41,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308430650] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-06 16:15:41,438 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-06 16:15:41,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-06 16:15:41,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615503531] [2022-12-06 16:15:41,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-06 16:15:41,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-06 16:15:41,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-06 16:15:41,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-06 16:15:41,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-06 16:15:41,444 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 110 [2022-12-06 16:15:41,445 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 2346 transitions, 31144 flow. Second operand has 5 states, 5 states have (on average 92.6) internal successors, (463), 5 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-06 16:15:41,445 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-06 16:15:41,445 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 110 [2022-12-06 16:15:41,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-06 16:15:42,553 INFO L130 PetriNetUnfolder]: 2665/6113 cut-off events. [2022-12-06 16:15:42,553 INFO L131 PetriNetUnfolder]: For 34586/36990 co-relation queries the response was YES. [2022-12-06 16:15:42,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30599 conditions, 6113 events. 2665/6113 cut-off events. For 34586/36990 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 57031 event pairs, 168 based on Foata normal form. 662/6715 useless extension candidates. Maximal degree in co-relation 29172. Up to 1254 conditions per place. [2022-12-06 16:15:42,578 INFO L137 encePairwiseOnDemand]: 103/110 looper letters, 208 selfloop transitions, 59 changer transitions 452/930 dead transitions. [2022-12-06 16:15:42,578 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 930 transitions, 13176 flow [2022-12-06 16:15:42,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-06 16:15:42,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-06 16:15:42,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 502 transitions. [2022-12-06 16:15:42,580 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.9127272727272727 [2022-12-06 16:15:42,580 INFO L294 CegarLoopForPetriNet]: 104 programPoint places, 56 predicate places. [2022-12-06 16:15:42,580 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 930 transitions, 13176 flow [2022-12-06 16:15:42,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 92.6) internal successors, (463), 5 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-06 16:15:42,581 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-06 16:15:42,581 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-06 16:15:42,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-06 16:15:42,581 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-06 16:15:42,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-06 16:15:42,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1216648497, now seen corresponding path program 1 times [2022-12-06 16:15:42,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-06 16:15:42,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616407362] [2022-12-06 16:15:42,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-06 16:15:42,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-06 16:15:42,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-06 16:15:42,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-06 16:15:42,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-06 16:15:42,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616407362] [2022-12-06 16:15:42,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616407362] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-06 16:15:42,669 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-06 16:15:42,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-06 16:15:42,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017712356] [2022-12-06 16:15:42,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-06 16:15:42,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-06 16:15:42,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-06 16:15:42,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-06 16:15:42,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-12-06 16:15:42,670 INFO L490 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 110 [2022-12-06 16:15:42,671 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 930 transitions, 13176 flow. Second operand has 7 states, 7 states have (on average 87.0) internal successors, (609), 7 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-06 16:15:42,671 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-06 16:15:42,671 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 110 [2022-12-06 16:15:42,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-06 16:15:43,665 INFO L130 PetriNetUnfolder]: 2863/7085 cut-off events. [2022-12-06 16:15:43,665 INFO L131 PetriNetUnfolder]: For 45022/47680 co-relation queries the response was YES. [2022-12-06 16:15:43,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37778 conditions, 7085 events. 2863/7085 cut-off events. For 45022/47680 co-relation queries the response was YES. Maximal size of possible extension queue 589. Compared 70531 event pairs, 113 based on Foata normal form. 277/7298 useless extension candidates. Maximal degree in co-relation 31933. Up to 1411 conditions per place. [2022-12-06 16:15:43,691 INFO L137 encePairwiseOnDemand]: 100/110 looper letters, 228 selfloop transitions, 72 changer transitions 593/1082 dead transitions. [2022-12-06 16:15:43,691 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 1082 transitions, 17191 flow [2022-12-06 16:15:43,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-06 16:15:43,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-12-06 16:15:43,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1216 transitions. [2022-12-06 16:15:43,693 INFO L535 CegarLoopForPetriNet]: DFA transition density 0.8503496503496504 [2022-12-06 16:15:43,693 INFO L294 CegarLoopForPetriNet]: 104 programPoint places, 68 predicate places. [2022-12-06 16:15:43,694 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 1082 transitions, 17191 flow [2022-12-06 16:15:43,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 87.0) internal successors, (609), 7 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-06 16:15:43,694 INFO L205 CegarLoopForPetriNet]: Found error trace [2022-12-06 16:15:43,694 INFO L213 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-06 16:15:43,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-06 16:15:43,694 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-12-06 16:15:43,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-06 16:15:43,695 INFO L85 PathProgramCache]: Analyzing trace with hash -276144235, now seen corresponding path program 2 times [2022-12-06 16:15:43,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-06 16:15:43,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945618521] [2022-12-06 16:15:43,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-06 16:15:43,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-06 16:15:43,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-06 16:15:43,707 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-06 16:15:43,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-06 16:15:43,733 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-06 16:15:43,733 INFO L373 BasicCegarLoop]: Counterexample is feasible [2022-12-06 16:15:43,734 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location readerErr0ASSERT_VIOLATIONERROR_FUNCTION (6 of 7 remaining) [2022-12-06 16:15:43,735 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location readerErr0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2022-12-06 16:15:43,735 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 7 remaining) [2022-12-06 16:15:43,735 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 7 remaining) [2022-12-06 16:15:43,735 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 7 remaining) [2022-12-06 16:15:43,735 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 7 remaining) [2022-12-06 16:15:43,736 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location readerErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2022-12-06 16:15:43,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-06 16:15:43,736 INFO L458 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1] [2022-12-06 16:15:43,740 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-12-06 16:15:43,740 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-06 16:15:43,776 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.12 04:15:43 BasicIcfg [2022-12-06 16:15:43,776 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-06 16:15:43,776 INFO L158 Benchmark]: Toolchain (without parser) took 18749.06ms. Allocated memory was 196.1MB in the beginning and 4.3GB in the end (delta: 4.1GB). Free memory was 170.9MB in the beginning and 3.4GB in the end (delta: -3.2GB). Peak memory consumption was 873.3MB. Max. memory is 8.0GB. [2022-12-06 16:15:43,776 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 196.1MB. Free memory is still 173.2MB. There was no memory consumed. Max. memory is 8.0GB. [2022-12-06 16:15:43,777 INFO L158 Benchmark]: CACSL2BoogieTranslator took 413.46ms. Allocated memory is still 196.1MB. Free memory was 170.6MB in the beginning and 149.1MB in the end (delta: 21.5MB). Peak memory consumption was 22.0MB. Max. memory is 8.0GB. [2022-12-06 16:15:43,777 INFO L158 Benchmark]: Boogie Procedure Inliner took 51.00ms. Allocated memory is still 196.1MB. Free memory was 149.1MB in the beginning and 147.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-12-06 16:15:43,777 INFO L158 Benchmark]: Boogie Preprocessor took 27.65ms. Allocated memory is still 196.1MB. Free memory was 146.5MB in the beginning and 145.4MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-12-06 16:15:43,777 INFO L158 Benchmark]: RCFGBuilder took 413.72ms. Allocated memory is still 196.1MB. Free memory was 144.9MB in the beginning and 129.2MB in the end (delta: 15.7MB). Peak memory consumption was 15.7MB. Max. memory is 8.0GB. [2022-12-06 16:15:43,778 INFO L158 Benchmark]: TraceAbstraction took 17839.11ms. Allocated memory was 196.1MB in the beginning and 4.3GB in the end (delta: 4.1GB). Free memory was 128.6MB in the beginning and 3.4GB in the end (delta: -3.2GB). Peak memory consumption was 831.4MB. Max. memory is 8.0GB. [2022-12-06 16:15:43,779 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 196.1MB. Free memory is still 173.2MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 413.46ms. Allocated memory is still 196.1MB. Free memory was 170.6MB in the beginning and 149.1MB in the end (delta: 21.5MB). Peak memory consumption was 22.0MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 51.00ms. Allocated memory is still 196.1MB. Free memory was 149.1MB in the beginning and 147.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 27.65ms. Allocated memory is still 196.1MB. Free memory was 146.5MB in the beginning and 145.4MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 413.72ms. Allocated memory is still 196.1MB. Free memory was 144.9MB in the beginning and 129.2MB in the end (delta: 15.7MB). Peak memory consumption was 15.7MB. Max. memory is 8.0GB. * TraceAbstraction took 17839.11ms. Allocated memory was 196.1MB in the beginning and 4.3GB in the end (delta: 4.1GB). Free memory was 128.6MB in the beginning and 3.4GB in the end (delta: -3.2GB). Peak memory consumption was 831.4MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 738]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L704] 0 int w=0, r=0, x, y; VAL [r=0, w=0, x=0, y=0] [L748] 0 pthread_t t1, t2, t3, t4; VAL [r=0, t1={6:0}, t2={7:0}, t3={8:0}, t4={5:0}, w=0, x=0, y=0] [L749] FCALL, FORK 0 pthread_create(&t1, 0, writer, 0) VAL [pthread_create(&t1, 0, writer, 0)=-3, r=0, t1={6:0}, t2={7:0}, t3={8:0}, t4={5:0}, w=0, x=0, y=0] [L750] FCALL, FORK 0 pthread_create(&t2, 0, reader, 0) VAL [pthread_create(&t2, 0, reader, 0)=-2, r=0, t1={6:0}, t2={7:0}, t3={8:0}, t4={5:0}, w=0, x=0, y=0] [L724] 2 int l; VAL [arg={0:0}, arg={0:0}, r=0, w=0, x=0, y=0] [L725] CALL 2 __VERIFIER_atomic_take_read_lock() [L710] CALL 2 assume_abort_if_not(w==0) [L3] COND FALSE 2 !(!cond) [L710] RET 2 assume_abort_if_not(w==0) [L711] 2 r = r+1 [L725] RET 2 __VERIFIER_atomic_take_read_lock() [L751] FCALL, FORK 0 pthread_create(&t3, 0, writer, 0) VAL [pthread_create(&t3, 0, writer, 0)=-1, r=1, t1={6:0}, t2={7:0}, t3={8:0}, t4={5:0}, w=0, x=0, y=0] [L752] FCALL, FORK 0 pthread_create(&t4, 0, reader, 0) VAL [pthread_create(&t4, 0, reader, 0)=0, r=1, t1={6:0}, t2={7:0}, t3={8:0}, t4={5:0}, w=0, x=0, y=0] [L724] 4 int l; VAL [arg={0:0}, arg={0:0}, r=1, w=0, x=0, y=0] [L727] 2 l = x VAL [arg={0:0}, arg={0:0}, l=0, r=1, w=0, x=0, y=0] [L730] 2 y = l VAL [arg={0:0}, arg={0:0}, l=0, r=1, w=0, x=0, y=0] [L733] 2 int ly = y; VAL [arg={0:0}, arg={0:0}, l=0, ly=0, r=1, w=0, x=0, y=0] [L736] 2 int lx = x; VAL [arg={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=1, w=0, x=0, y=0] [L738] COND FALSE 2 !(!(ly == lx)) VAL [arg={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=1, w=0, x=0, y=0] [L740] 2 l = r-1 VAL [arg={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=1, w=0, x=0, y=0] [L725] CALL 4 __VERIFIER_atomic_take_read_lock() [L710] CALL 4 assume_abort_if_not(w==0) [L3] COND FALSE 4 !(!cond) [L710] RET 4 assume_abort_if_not(w==0) [L711] 4 r = r+1 [L725] RET 4 __VERIFIER_atomic_take_read_lock() [L743] 2 r = l VAL [arg={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=0, w=0, x=0, y=0] [L714] CALL 1 __VERIFIER_atomic_take_write_lock() [L706] CALL 1 assume_abort_if_not(w==0 && r==0) [L3] COND FALSE 1 !(!cond) [L706] RET 1 assume_abort_if_not(w==0 && r==0) [L707] 1 w = 1 [L714] RET 1 __VERIFIER_atomic_take_write_lock() [L727] 4 l = x VAL [arg={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=0, w=1, x=0, y=0] [L730] 4 y = l VAL [arg={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=0, w=1, x=0, y=0] [L733] 4 int ly = y; VAL [arg={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=0, w=1, x=0, y=0] [L716] 1 x = 3 VAL [arg={0:0}, arg={0:0}, r=0, w=1, x=3, y=0] [L736] 4 int lx = x; VAL [arg={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=0, w=1, x=3, y=0] [L738] COND TRUE 4 !(ly == lx) VAL [arg={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=0, w=1, x=3, y=0] [L738] 4 reach_error() VAL [arg={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=0, w=1, x=3, y=0] - UnprovableResult [Line: 749]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 752]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 751]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 750]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 135 locations, 7 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 17.7s, OverallIterations: 9, TraceHistogramMax: 1, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 16.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 609 SdHoareTripleChecker+Valid, 0.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 609 mSDsluCounter, 395 SdHoareTripleChecker+Invalid, 0.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 227 mSDsCounter, 48 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1481 IncrementalHoareTripleChecker+Invalid, 1529 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 48 mSolverCounterUnsat, 168 mSDtfsCounter, 1481 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 85 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=31144occurred in iteration=6, InterpolantAutomatonStates: 76, 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, 0.7s InterpolantComputationTime, 444 NumberOfCodeBlocks, 444 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 375 ConstructedInterpolants, 0 QuantifiedInterpolants, 650 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 RESULT: Ultimate proved your program to be incorrect! [2022-12-06 16:15:43,793 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...