./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-ext/18_read_write_lock.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/pthread-ext/18_read_write_lock.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 72289b7b84ec29dc48aff6fa2f8d521998f594af518139867a01f104107e1865 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 21:18:12,452 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 21:18:12,454 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 21:18:12,497 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 21:18:12,498 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 21:18:12,500 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 21:18:12,503 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 21:18:12,508 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 21:18:12,510 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 21:18:12,515 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 21:18:12,517 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 21:18:12,523 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 21:18:12,523 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 21:18:12,525 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 21:18:12,527 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 21:18:12,531 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 21:18:12,532 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 21:18:12,534 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 21:18:12,535 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 21:18:12,541 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 21:18:12,543 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 21:18:12,545 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 21:18:12,546 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 21:18:12,547 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 21:18:12,548 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 21:18:12,556 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 21:18:12,556 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 21:18:12,557 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 21:18:12,558 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 21:18:12,559 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 21:18:12,560 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 21:18:12,560 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 21:18:12,562 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 21:18:12,563 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 21:18:12,564 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 21:18:12,566 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 21:18:12,566 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 21:18:12,567 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 21:18:12,567 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 21:18:12,567 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 21:18:12,568 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 21:18:12,570 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 21:18:12,571 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 21:18:12,608 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 21:18:12,611 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 21:18:12,611 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 21:18:12,612 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 21:18:12,612 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 21:18:12,613 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 21:18:12,613 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 21:18:12,613 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 21:18:12,614 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 21:18:12,615 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 21:18:12,615 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 21:18:12,615 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 21:18:12,615 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 21:18:12,615 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 21:18:12,616 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 21:18:12,616 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 21:18:12,616 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 21:18:12,616 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 21:18:12,616 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 21:18:12,618 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 21:18:12,618 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 21:18:12,618 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 21:18:12,619 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 21:18:12,619 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 21:18:12,619 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:18:12,619 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 21:18:12,620 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 21:18:12,620 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 21:18:12,620 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 21:18:12,620 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 21:18:12,620 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 21:18:12,621 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 21:18:12,621 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 21:18:12,621 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 72289b7b84ec29dc48aff6fa2f8d521998f594af518139867a01f104107e1865 [2022-07-22 21:18:12,851 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 21:18:12,873 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 21:18:12,876 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 21:18:12,878 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 21:18:12,879 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 21:18:12,880 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-ext/18_read_write_lock.i [2022-07-22 21:18:12,957 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/77d6a1df8/59016ff69ea94f5bb71882343e7372c0/FLAG1d6761210 [2022-07-22 21:18:13,587 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 21:18:13,588 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/18_read_write_lock.i [2022-07-22 21:18:13,607 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/77d6a1df8/59016ff69ea94f5bb71882343e7372c0/FLAG1d6761210 [2022-07-22 21:18:13,862 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/77d6a1df8/59016ff69ea94f5bb71882343e7372c0 [2022-07-22 21:18:13,865 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 21:18:13,867 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 21:18:13,872 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 21:18:13,873 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 21:18:13,876 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 21:18:13,876 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:18:13" (1/1) ... [2022-07-22 21:18:13,877 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a03d9a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:18:13, skipping insertion in model container [2022-07-22 21:18:13,878 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:18:13" (1/1) ... [2022-07-22 21:18:13,885 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 21:18:13,932 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 21:18:14,078 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-07-22 21:18:14,205 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/18_read_write_lock.i[31161,31174] [2022-07-22 21:18:14,216 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:18:14,225 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 21:18:14,253 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-07-22 21:18:14,279 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-ext/18_read_write_lock.i[31161,31174] [2022-07-22 21:18:14,282 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:18:14,312 INFO L208 MainTranslator]: Completed translation [2022-07-22 21:18:14,313 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:18:14 WrapperNode [2022-07-22 21:18:14,313 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 21:18:14,322 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 21:18:14,323 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 21:18:14,323 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 21:18:14,329 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:18:14" (1/1) ... [2022-07-22 21:18:14,351 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:18:14" (1/1) ... [2022-07-22 21:18:14,377 INFO L137 Inliner]: procedures = 174, calls = 32, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 78 [2022-07-22 21:18:14,378 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 21:18:14,379 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 21:18:14,379 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 21:18:14,379 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 21:18:14,386 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:18:14" (1/1) ... [2022-07-22 21:18:14,386 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:18:14" (1/1) ... [2022-07-22 21:18:14,394 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:18:14" (1/1) ... [2022-07-22 21:18:14,395 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:18:14" (1/1) ... [2022-07-22 21:18:14,411 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:18:14" (1/1) ... [2022-07-22 21:18:14,416 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:18:14" (1/1) ... [2022-07-22 21:18:14,418 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:18:14" (1/1) ... [2022-07-22 21:18:14,421 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 21:18:14,426 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 21:18:14,427 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 21:18:14,427 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 21:18:14,429 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:18:14" (1/1) ... [2022-07-22 21:18:14,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:18:14,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:18:14,465 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-22 21:18:14,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-22 21:18:14,515 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2022-07-22 21:18:14,515 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2022-07-22 21:18:14,515 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-22 21:18:14,515 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-22 21:18:14,516 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 21:18:14,516 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-22 21:18:14,516 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-22 21:18:14,516 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 21:18:14,516 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-22 21:18:14,516 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 21:18:14,517 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 21:18:14,518 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-22 21:18:14,668 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 21:18:14,669 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 21:18:14,813 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 21:18:14,845 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 21:18:14,845 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-07-22 21:18:14,847 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:18:14 BoogieIcfgContainer [2022-07-22 21:18:14,848 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 21:18:14,849 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 21:18:14,850 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 21:18:14,852 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 21:18:14,852 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 09:18:13" (1/3) ... [2022-07-22 21:18:14,853 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28f2058e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:18:14, skipping insertion in model container [2022-07-22 21:18:14,853 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:18:14" (2/3) ... [2022-07-22 21:18:14,853 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28f2058e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:18:14, skipping insertion in model container [2022-07-22 21:18:14,853 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:18:14" (3/3) ... [2022-07-22 21:18:14,855 INFO L111 eAbstractionObserver]: Analyzing ICFG 18_read_write_lock.i [2022-07-22 21:18:14,860 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-22 21:18:14,869 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 21:18:14,869 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 21:18:14,869 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-22 21:18:14,906 INFO L135 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-07-22 21:18:14,936 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 60 places, 57 transitions, 119 flow [2022-07-22 21:18:14,961 INFO L129 PetriNetUnfolder]: 1/56 cut-off events. [2022-07-22 21:18:14,962 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-22 21:18:14,964 INFO L84 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 56 events. 1/56 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 18 event pairs, 0 based on Foata normal form. 0/54 useless extension candidates. Maximal degree in co-relation 35. Up to 2 conditions per place. [2022-07-22 21:18:14,965 INFO L82 GeneralOperation]: Start removeDead. Operand has 60 places, 57 transitions, 119 flow [2022-07-22 21:18:14,968 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 45 places, 41 transitions, 85 flow [2022-07-22 21:18:14,979 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:18:14,991 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@2fc87bef, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@69a4c6de [2022-07-22 21:18:14,992 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-22 21:18:15,015 INFO L129 PetriNetUnfolder]: 0/40 cut-off events. [2022-07-22 21:18:15,016 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-07-22 21:18:15,016 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:18:15,017 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:18:15,018 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:18:15,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:18:15,023 INFO L85 PathProgramCache]: Analyzing trace with hash 2066246596, now seen corresponding path program 1 times [2022-07-22 21:18:15,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:18:15,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306360795] [2022-07-22 21:18:15,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:18:15,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:18:15,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:18:15,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:18:15,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:18:15,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306360795] [2022-07-22 21:18:15,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306360795] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:18:15,309 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:18:15,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 21:18:15,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817107344] [2022-07-22 21:18:15,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:18:15,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 21:18:15,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:18:15,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 21:18:15,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-22 21:18:15,361 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 57 [2022-07-22 21:18:15,366 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 41 transitions, 85 flow. Second operand has 6 states, 6 states have (on average 43.666666666666664) internal successors, (262), 6 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:18:15,366 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:18:15,367 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 57 [2022-07-22 21:18:15,368 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:18:15,523 INFO L129 PetriNetUnfolder]: 10/86 cut-off events. [2022-07-22 21:18:15,524 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-22 21:18:15,525 INFO L84 FinitePrefix]: Finished finitePrefix Result has 130 conditions, 86 events. 10/86 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 188 event pairs, 4 based on Foata normal form. 4/88 useless extension candidates. Maximal degree in co-relation 101. Up to 23 conditions per place. [2022-07-22 21:18:15,527 INFO L132 encePairwiseOnDemand]: 51/57 looper letters, 13 selfloop transitions, 6 changer transitions 4/52 dead transitions. [2022-07-22 21:18:15,527 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 52 transitions, 153 flow [2022-07-22 21:18:15,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 21:18:15,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-22 21:18:15,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 319 transitions. [2022-07-22 21:18:15,555 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7994987468671679 [2022-07-22 21:18:15,556 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 319 transitions. [2022-07-22 21:18:15,556 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 319 transitions. [2022-07-22 21:18:15,559 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:18:15,562 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 319 transitions. [2022-07-22 21:18:15,569 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 45.57142857142857) internal successors, (319), 7 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:18:15,595 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 57.0) internal successors, (456), 8 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:18:15,596 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 57.0) internal successors, (456), 8 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:18:15,598 INFO L186 Difference]: Start difference. First operand has 45 places, 41 transitions, 85 flow. Second operand 7 states and 319 transitions. [2022-07-22 21:18:15,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 52 transitions, 153 flow [2022-07-22 21:18:15,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 52 transitions, 152 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-07-22 21:18:15,611 INFO L242 Difference]: Finished difference. Result has 55 places, 45 transitions, 122 flow [2022-07-22 21:18:15,613 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=122, PETRI_PLACES=55, PETRI_TRANSITIONS=45} [2022-07-22 21:18:15,618 INFO L279 CegarLoopForPetriNet]: 45 programPoint places, 10 predicate places. [2022-07-22 21:18:15,618 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 45 transitions, 122 flow [2022-07-22 21:18:15,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 43.666666666666664) internal successors, (262), 6 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:18:15,619 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:18:15,619 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:18:15,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 21:18:15,620 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:18:15,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:18:15,622 INFO L85 PathProgramCache]: Analyzing trace with hash 924971105, now seen corresponding path program 1 times [2022-07-22 21:18:15,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:18:15,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472463773] [2022-07-22 21:18:15,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:18:15,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:18:15,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:18:15,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:18:15,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:18:15,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472463773] [2022-07-22 21:18:15,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472463773] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:18:15,724 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:18:15,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 21:18:15,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334412072] [2022-07-22 21:18:15,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:18:15,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 21:18:15,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:18:15,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 21:18:15,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 21:18:15,727 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 57 [2022-07-22 21:18:15,728 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 45 transitions, 122 flow. Second operand has 4 states, 4 states have (on average 50.0) internal successors, (200), 4 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:18:15,728 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:18:15,728 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 57 [2022-07-22 21:18:15,728 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:18:15,744 INFO L129 PetriNetUnfolder]: 2/55 cut-off events. [2022-07-22 21:18:15,744 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-22 21:18:15,745 INFO L84 FinitePrefix]: Finished finitePrefix Result has 91 conditions, 55 events. 2/55 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 49 event pairs, 0 based on Foata normal form. 1/55 useless extension candidates. Maximal degree in co-relation 79. Up to 5 conditions per place. [2022-07-22 21:18:15,745 INFO L132 encePairwiseOnDemand]: 54/57 looper letters, 2 selfloop transitions, 2 changer transitions 0/45 dead transitions. [2022-07-22 21:18:15,746 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 45 transitions, 130 flow [2022-07-22 21:18:15,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 21:18:15,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-22 21:18:15,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 201 transitions. [2022-07-22 21:18:15,747 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.881578947368421 [2022-07-22 21:18:15,747 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 201 transitions. [2022-07-22 21:18:15,748 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 201 transitions. [2022-07-22 21:18:15,748 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:18:15,748 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 201 transitions. [2022-07-22 21:18:15,749 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 50.25) internal successors, (201), 4 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:18:15,750 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 57.0) internal successors, (285), 5 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:18:15,750 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 57.0) internal successors, (285), 5 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:18:15,751 INFO L186 Difference]: Start difference. First operand has 55 places, 45 transitions, 122 flow. Second operand 4 states and 201 transitions. [2022-07-22 21:18:15,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 45 transitions, 130 flow [2022-07-22 21:18:15,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 45 transitions, 122 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-07-22 21:18:15,753 INFO L242 Difference]: Finished difference. Result has 54 places, 45 transitions, 121 flow [2022-07-22 21:18:15,753 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=121, PETRI_PLACES=54, PETRI_TRANSITIONS=45} [2022-07-22 21:18:15,754 INFO L279 CegarLoopForPetriNet]: 45 programPoint places, 9 predicate places. [2022-07-22 21:18:15,754 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 45 transitions, 121 flow [2022-07-22 21:18:15,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 50.0) internal successors, (200), 4 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:18:15,755 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:18:15,755 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:18:15,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 21:18:15,756 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:18:15,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:18:15,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1654750303, now seen corresponding path program 2 times [2022-07-22 21:18:15,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:18:15,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625563920] [2022-07-22 21:18:15,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:18:15,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:18:15,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:18:15,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:18:15,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:18:15,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625563920] [2022-07-22 21:18:15,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625563920] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:18:15,801 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:18:15,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 21:18:15,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23722122] [2022-07-22 21:18:15,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:18:15,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 21:18:15,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:18:15,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 21:18:15,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 21:18:15,804 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 57 [2022-07-22 21:18:15,804 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 45 transitions, 121 flow. Second operand has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:18:15,804 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:18:15,805 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 57 [2022-07-22 21:18:15,805 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:18:15,815 INFO L129 PetriNetUnfolder]: 0/34 cut-off events. [2022-07-22 21:18:15,816 INFO L130 PetriNetUnfolder]: For 7/9 co-relation queries the response was YES. [2022-07-22 21:18:15,816 INFO L84 FinitePrefix]: Finished finitePrefix Result has 55 conditions, 34 events. 0/34 cut-off events. For 7/9 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 4 event pairs, 0 based on Foata normal form. 1/35 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2022-07-22 21:18:15,816 INFO L132 encePairwiseOnDemand]: 55/57 looper letters, 0 selfloop transitions, 0 changer transitions 34/34 dead transitions. [2022-07-22 21:18:15,816 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 34 transitions, 95 flow [2022-07-22 21:18:15,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 21:18:15,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-07-22 21:18:15,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 155 transitions. [2022-07-22 21:18:15,818 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9064327485380117 [2022-07-22 21:18:15,819 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 155 transitions. [2022-07-22 21:18:15,819 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 155 transitions. [2022-07-22 21:18:15,819 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:18:15,821 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 155 transitions. [2022-07-22 21:18:15,821 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 51.666666666666664) internal successors, (155), 3 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:18:15,823 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 57.0) internal successors, (228), 4 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:18:15,825 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 57.0) internal successors, (228), 4 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:18:15,825 INFO L186 Difference]: Start difference. First operand has 54 places, 45 transitions, 121 flow. Second operand 3 states and 155 transitions. [2022-07-22 21:18:15,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 34 transitions, 95 flow [2022-07-22 21:18:15,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 34 transitions, 83 flow, removed 0 selfloop flow, removed 7 redundant places. [2022-07-22 21:18:15,827 INFO L242 Difference]: Finished difference. Result has 42 places, 0 transitions, 0 flow [2022-07-22 21:18:15,827 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=75, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=42, PETRI_TRANSITIONS=0} [2022-07-22 21:18:15,828 INFO L279 CegarLoopForPetriNet]: 45 programPoint places, -3 predicate places. [2022-07-22 21:18:15,829 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 0 transitions, 0 flow [2022-07-22 21:18:15,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:18:15,832 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2022-07-22 21:18:15,832 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2022-07-22 21:18:15,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-22 21:18:15,833 INFO L356 BasicCegarLoop]: Path program histogram: [2, 1] [2022-07-22 21:18:15,838 INFO L226 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-07-22 21:18:15,839 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-22 21:18:15,848 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.07 09:18:15 BasicIcfg [2022-07-22 21:18:15,848 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-22 21:18:15,849 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-22 21:18:15,849 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-22 21:18:15,849 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-22 21:18:15,850 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:18:14" (3/4) ... [2022-07-22 21:18:15,852 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-07-22 21:18:15,857 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thr1 [2022-07-22 21:18:15,861 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 20 nodes and edges [2022-07-22 21:18:15,861 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2022-07-22 21:18:15,861 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2022-07-22 21:18:15,861 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-07-22 21:18:15,888 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2022-07-22 21:18:15,888 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-22 21:18:15,889 INFO L158 Benchmark]: Toolchain (without parser) took 2022.36ms. Allocated memory is still 100.7MB. Free memory was 67.7MB in the beginning and 49.0MB in the end (delta: 18.6MB). Peak memory consumption was 19.8MB. Max. memory is 16.1GB. [2022-07-22 21:18:15,889 INFO L158 Benchmark]: CDTParser took 0.33ms. Allocated memory is still 79.7MB. Free memory is still 47.0MB. There was no memory consumed. Max. memory is 16.1GB. [2022-07-22 21:18:15,890 INFO L158 Benchmark]: CACSL2BoogieTranslator took 440.92ms. Allocated memory is still 100.7MB. Free memory was 67.5MB in the beginning and 48.3MB in the end (delta: 19.1MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2022-07-22 21:18:15,890 INFO L158 Benchmark]: Boogie Procedure Inliner took 55.51ms. Allocated memory is still 100.7MB. Free memory was 79.4MB in the beginning and 77.4MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-22 21:18:15,890 INFO L158 Benchmark]: Boogie Preprocessor took 46.47ms. Allocated memory is still 100.7MB. Free memory was 77.4MB in the beginning and 76.3MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-22 21:18:15,891 INFO L158 Benchmark]: RCFGBuilder took 422.04ms. Allocated memory is still 100.7MB. Free memory was 76.3MB in the beginning and 62.7MB in the end (delta: 13.5MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-07-22 21:18:15,891 INFO L158 Benchmark]: TraceAbstraction took 999.04ms. Allocated memory is still 100.7MB. Free memory was 62.4MB in the beginning and 51.7MB in the end (delta: 10.6MB). Peak memory consumption was 7.3MB. Max. memory is 16.1GB. [2022-07-22 21:18:15,891 INFO L158 Benchmark]: Witness Printer took 39.59ms. Allocated memory is still 100.7MB. Free memory was 51.7MB in the beginning and 49.0MB in the end (delta: 2.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-07-22 21:18:15,893 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33ms. Allocated memory is still 79.7MB. Free memory is still 47.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 440.92ms. Allocated memory is still 100.7MB. Free memory was 67.5MB in the beginning and 48.3MB in the end (delta: 19.1MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 55.51ms. Allocated memory is still 100.7MB. Free memory was 79.4MB in the beginning and 77.4MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 46.47ms. Allocated memory is still 100.7MB. Free memory was 77.4MB in the beginning and 76.3MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 422.04ms. Allocated memory is still 100.7MB. Free memory was 76.3MB in the beginning and 62.7MB in the end (delta: 13.5MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 999.04ms. Allocated memory is still 100.7MB. Free memory was 62.4MB in the beginning and 51.7MB in the end (delta: 10.6MB). Peak memory consumption was 7.3MB. Max. memory is 16.1GB. * Witness Printer took 39.59ms. Allocated memory is still 100.7MB. Free memory was 51.7MB in the beginning and 49.0MB in the end (delta: 2.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 738]: 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 3 procedures, 65 locations, 2 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: 0.9s, OverallIterations: 3, TraceHistogramMax: 1, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 12 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 12 mSDsluCounter, 25 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 33 mSDsCounter, 0 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 78 IncrementalHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 0 mSolverCounterUnsat, 12 mSDtfsCounter, 78 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=122occurred in iteration=1, InterpolantAutomatonStates: 14, 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, 0.2s InterpolantComputationTime, 111 NumberOfCodeBlocks, 111 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 108 ConstructedInterpolants, 0 QuantifiedInterpolants, 176 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 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! [2022-07-22 21:18:15,929 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE