./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread-divine/ring_2w1r-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 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-divine/ring_2w1r-1.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 509c3c8c1895397e4c0d03f6462ad0ca0ed3ce99b40d08b775ab8473dba5ee1f --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 08:47:47,453 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 08:47:47,456 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 08:47:47,489 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 08:47:47,489 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 08:47:47,490 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 08:47:47,494 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 08:47:47,496 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 08:47:47,498 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 08:47:47,501 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 08:47:47,502 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 08:47:47,504 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 08:47:47,504 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 08:47:47,505 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 08:47:47,506 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 08:47:47,510 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 08:47:47,511 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 08:47:47,512 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 08:47:47,513 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 08:47:47,518 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 08:47:47,519 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 08:47:47,520 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 08:47:47,521 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 08:47:47,522 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 08:47:47,523 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 08:47:47,528 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 08:47:47,529 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 08:47:47,529 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 08:47:47,530 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 08:47:47,530 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 08:47:47,531 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 08:47:47,531 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 08:47:47,532 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 08:47:47,533 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 08:47:47,534 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 08:47:47,534 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 08:47:47,534 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 08:47:47,535 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 08:47:47,535 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 08:47:47,535 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 08:47:47,536 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 08:47:47,537 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 08:47:47,544 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-21 08:47:47,575 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 08:47:47,575 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 08:47:47,576 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 08:47:47,576 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 08:47:47,576 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 08:47:47,577 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 08:47:47,577 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 08:47:47,577 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 08:47:47,578 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 08:47:47,578 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 08:47:47,578 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 08:47:47,579 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 08:47:47,579 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 08:47:47,579 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 08:47:47,579 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 08:47:47,580 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 08:47:47,580 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 08:47:47,580 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 08:47:47,580 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 08:47:47,580 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 08:47:47,580 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 08:47:47,581 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 08:47:47,581 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 08:47:47,581 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 08:47:47,581 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 08:47:47,581 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 08:47:47,582 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 08:47:47,582 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 08:47:47,582 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 08:47:47,582 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 08:47:47,582 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 08:47:47,582 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 08:47:47,583 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 08:47:47,583 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 509c3c8c1895397e4c0d03f6462ad0ca0ed3ce99b40d08b775ab8473dba5ee1f [2022-07-21 08:47:47,851 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 08:47:47,867 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 08:47:47,869 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 08:47:47,870 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 08:47:47,870 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 08:47:47,872 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-divine/ring_2w1r-1.i [2022-07-21 08:47:47,919 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/436d9e7db/30572e1710dc4cb4972b06cb9a0ae936/FLAGe09be4bcb [2022-07-21 08:47:48,314 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 08:47:48,314 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-divine/ring_2w1r-1.i [2022-07-21 08:47:48,327 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/436d9e7db/30572e1710dc4cb4972b06cb9a0ae936/FLAGe09be4bcb [2022-07-21 08:47:48,659 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/436d9e7db/30572e1710dc4cb4972b06cb9a0ae936 [2022-07-21 08:47:48,661 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 08:47:48,662 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 08:47:48,663 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 08:47:48,663 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 08:47:48,667 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 08:47:48,668 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:47:48" (1/1) ... [2022-07-21 08:47:48,668 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c4fbe14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:47:48, skipping insertion in model container [2022-07-21 08:47:48,669 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:47:48" (1/1) ... [2022-07-21 08:47:48,673 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 08:47:48,718 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 08:47:48,841 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-07-21 08:47:49,048 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-divine/ring_2w1r-1.i[39095,39108] [2022-07-21 08:47:49,053 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-divine/ring_2w1r-1.i[39180,39193] [2022-07-21 08:47:49,054 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-divine/ring_2w1r-1.i[39232,39245] [2022-07-21 08:47:49,103 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-divine/ring_2w1r-1.i[49388,49401] [2022-07-21 08:47:49,104 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-divine/ring_2w1r-1.i[49437,49450] [2022-07-21 08:47:49,106 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-divine/ring_2w1r-1.i[49565,49578] [2022-07-21 08:47:49,107 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-divine/ring_2w1r-1.i[49623,49636] [2022-07-21 08:47:49,112 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 08:47:49,126 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 08:47:49,139 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-07-21 08:47:49,158 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-divine/ring_2w1r-1.i[39095,39108] [2022-07-21 08:47:49,160 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-divine/ring_2w1r-1.i[39180,39193] [2022-07-21 08:47:49,161 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-divine/ring_2w1r-1.i[39232,39245] [2022-07-21 08:47:49,180 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-divine/ring_2w1r-1.i[49388,49401] [2022-07-21 08:47:49,181 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-divine/ring_2w1r-1.i[49437,49450] [2022-07-21 08:47:49,182 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-divine/ring_2w1r-1.i[49565,49578] [2022-07-21 08:47:49,182 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-divine/ring_2w1r-1.i[49623,49636] [2022-07-21 08:47:49,190 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 08:47:49,260 INFO L208 MainTranslator]: Completed translation [2022-07-21 08:47:49,261 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:47:49 WrapperNode [2022-07-21 08:47:49,261 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 08:47:49,262 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 08:47:49,263 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 08:47:49,263 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 08:47:49,267 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:47:49" (1/1) ... [2022-07-21 08:47:49,294 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:47:49" (1/1) ... [2022-07-21 08:47:49,326 INFO L137 Inliner]: procedures = 310, calls = 70, calls flagged for inlining = 10, calls inlined = 8, statements flattened = 203 [2022-07-21 08:47:49,327 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 08:47:49,328 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 08:47:49,328 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 08:47:49,329 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 08:47:49,334 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:47:49" (1/1) ... [2022-07-21 08:47:49,335 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:47:49" (1/1) ... [2022-07-21 08:47:49,349 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:47:49" (1/1) ... [2022-07-21 08:47:49,350 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:47:49" (1/1) ... [2022-07-21 08:47:49,356 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:47:49" (1/1) ... [2022-07-21 08:47:49,359 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:47:49" (1/1) ... [2022-07-21 08:47:49,360 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:47:49" (1/1) ... [2022-07-21 08:47:49,364 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 08:47:49,365 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 08:47:49,365 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 08:47:49,365 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 08:47:49,366 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:47:49" (1/1) ... [2022-07-21 08:47:49,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 08:47:49,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 08:47:49,388 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) [2022-07-21 08:47:49,393 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 [2022-07-21 08:47:49,418 INFO L130 BoogieDeclarations]: Found specification of procedure reader_two [2022-07-21 08:47:49,418 INFO L138 BoogieDeclarations]: Found implementation of procedure reader_two [2022-07-21 08:47:49,418 INFO L130 BoogieDeclarations]: Found specification of procedure writer_fn [2022-07-21 08:47:49,418 INFO L138 BoogieDeclarations]: Found implementation of procedure writer_fn [2022-07-21 08:47:49,418 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-21 08:47:49,418 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 08:47:49,419 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-21 08:47:49,419 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-21 08:47:49,419 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-07-21 08:47:49,419 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 08:47:49,419 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 08:47:49,419 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 08:47:49,419 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 08:47:49,421 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-21 08:47:49,567 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 08:47:49,568 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 08:47:49,878 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 08:47:49,891 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 08:47:49,891 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-07-21 08:47:49,893 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:47:49 BoogieIcfgContainer [2022-07-21 08:47:49,893 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 08:47:49,894 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 08:47:49,894 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 08:47:49,896 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 08:47:49,896 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 08:47:48" (1/3) ... [2022-07-21 08:47:49,897 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d3625cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:47:49, skipping insertion in model container [2022-07-21 08:47:49,897 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:47:49" (2/3) ... [2022-07-21 08:47:49,897 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d3625cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:47:49, skipping insertion in model container [2022-07-21 08:47:49,897 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:47:49" (3/3) ... [2022-07-21 08:47:49,898 INFO L111 eAbstractionObserver]: Analyzing ICFG ring_2w1r-1.i [2022-07-21 08:47:49,902 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-21 08:47:49,908 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 08:47:49,908 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2022-07-21 08:47:49,908 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-21 08:47:49,989 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-21 08:47:50,030 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 223 places, 233 transitions, 482 flow [2022-07-21 08:47:50,126 INFO L129 PetriNetUnfolder]: 17/231 cut-off events. [2022-07-21 08:47:50,128 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-21 08:47:50,135 INFO L84 FinitePrefix]: Finished finitePrefix Result has 240 conditions, 231 events. 17/231 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 462 event pairs, 0 based on Foata normal form. 0/210 useless extension candidates. Maximal degree in co-relation 179. Up to 2 conditions per place. [2022-07-21 08:47:50,136 INFO L82 GeneralOperation]: Start removeDead. Operand has 223 places, 233 transitions, 482 flow [2022-07-21 08:47:50,144 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 210 places, 220 transitions, 449 flow [2022-07-21 08:47:50,158 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 08:47:50,164 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@48e1a895, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3e12addc [2022-07-21 08:47:50,165 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2022-07-21 08:47:50,211 INFO L129 PetriNetUnfolder]: 11/188 cut-off events. [2022-07-21 08:47:50,213 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-21 08:47:50,214 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:47:50,214 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:47:50,215 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION === [reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr1ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2022-07-21 08:47:50,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:47:50,220 INFO L85 PathProgramCache]: Analyzing trace with hash 508547485, now seen corresponding path program 1 times [2022-07-21 08:47:50,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:47:50,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068365276] [2022-07-21 08:47:50,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:47:50,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:47:50,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:47:50,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:47:50,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:47:50,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068365276] [2022-07-21 08:47:50,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068365276] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:47:50,850 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:47:50,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-07-21 08:47:50,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857878386] [2022-07-21 08:47:50,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:47:50,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-21 08:47:50,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:47:50,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-21 08:47:50,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2022-07-21 08:47:50,895 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 233 [2022-07-21 08:47:50,902 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 220 transitions, 449 flow. Second operand has 18 states, 18 states have (on average 138.16666666666666) internal successors, (2487), 18 states have internal predecessors, (2487), 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) [2022-07-21 08:47:50,902 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:47:50,902 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 233 [2022-07-21 08:47:50,903 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:47:54,851 INFO L129 PetriNetUnfolder]: 6891/21160 cut-off events. [2022-07-21 08:47:54,851 INFO L130 PetriNetUnfolder]: For 74/74 co-relation queries the response was YES. [2022-07-21 08:47:54,900 INFO L84 FinitePrefix]: Finished finitePrefix Result has 30740 conditions, 21160 events. 6891/21160 cut-off events. For 74/74 co-relation queries the response was YES. Maximal size of possible extension queue 601. Compared 233895 event pairs, 3603 based on Foata normal form. 1581/20932 useless extension candidates. Maximal degree in co-relation 30525. Up to 7338 conditions per place. [2022-07-21 08:47:54,975 INFO L132 encePairwiseOnDemand]: 201/233 looper letters, 182 selfloop transitions, 40 changer transitions 0/350 dead transitions. [2022-07-21 08:47:54,975 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 350 transitions, 1174 flow [2022-07-21 08:47:54,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-21 08:47:54,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-07-21 08:47:54,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 3769 transitions. [2022-07-21 08:47:54,992 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.622152525586002 [2022-07-21 08:47:54,993 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 3769 transitions. [2022-07-21 08:47:54,993 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 3769 transitions. [2022-07-21 08:47:54,997 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:47:54,999 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 3769 transitions. [2022-07-21 08:47:55,008 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 144.96153846153845) internal successors, (3769), 26 states have internal predecessors, (3769), 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) [2022-07-21 08:47:55,021 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 233.0) internal successors, (6291), 27 states have internal predecessors, (6291), 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) [2022-07-21 08:47:55,023 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 233.0) internal successors, (6291), 27 states have internal predecessors, (6291), 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) [2022-07-21 08:47:55,025 INFO L186 Difference]: Start difference. First operand has 210 places, 220 transitions, 449 flow. Second operand 26 states and 3769 transitions. [2022-07-21 08:47:55,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 350 transitions, 1174 flow [2022-07-21 08:47:55,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 350 transitions, 1161 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-07-21 08:47:55,040 INFO L242 Difference]: Finished difference. Result has 242 places, 241 transitions, 636 flow [2022-07-21 08:47:55,041 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=233, PETRI_DIFFERENCE_MINUEND_FLOW=424, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=636, PETRI_PLACES=242, PETRI_TRANSITIONS=241} [2022-07-21 08:47:55,045 INFO L279 CegarLoopForPetriNet]: 210 programPoint places, 32 predicate places. [2022-07-21 08:47:55,045 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 241 transitions, 636 flow [2022-07-21 08:47:55,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 138.16666666666666) internal successors, (2487), 18 states have internal predecessors, (2487), 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) [2022-07-21 08:47:55,047 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:47:55,047 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:47:55,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 08:47:55,048 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION === [reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr1ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2022-07-21 08:47:55,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:47:55,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1573639700, now seen corresponding path program 1 times [2022-07-21 08:47:55,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:47:55,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526018651] [2022-07-21 08:47:55,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:47:55,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:47:55,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:47:55,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:47:55,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:47:55,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526018651] [2022-07-21 08:47:55,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526018651] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:47:55,550 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:47:55,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-07-21 08:47:55,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140239356] [2022-07-21 08:47:55,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:47:55,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-21 08:47:55,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:47:55,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-21 08:47:55,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2022-07-21 08:47:55,555 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 233 [2022-07-21 08:47:55,557 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 241 transitions, 636 flow. Second operand has 20 states, 20 states have (on average 136.9) internal successors, (2738), 20 states have internal predecessors, (2738), 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) [2022-07-21 08:47:55,558 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:47:55,558 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 233 [2022-07-21 08:47:55,558 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:47:59,818 INFO L129 PetriNetUnfolder]: 8787/26100 cut-off events. [2022-07-21 08:47:59,818 INFO L130 PetriNetUnfolder]: For 2473/2479 co-relation queries the response was YES. [2022-07-21 08:47:59,912 INFO L84 FinitePrefix]: Finished finitePrefix Result has 40949 conditions, 26100 events. 8787/26100 cut-off events. For 2473/2479 co-relation queries the response was YES. Maximal size of possible extension queue 695. Compared 299547 event pairs, 1445 based on Foata normal form. 31/24401 useless extension candidates. Maximal degree in co-relation 39805. Up to 8791 conditions per place. [2022-07-21 08:47:59,993 INFO L132 encePairwiseOnDemand]: 209/233 looper letters, 221 selfloop transitions, 67 changer transitions 8/424 dead transitions. [2022-07-21 08:47:59,993 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 424 transitions, 1675 flow [2022-07-21 08:47:59,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-21 08:47:59,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-07-21 08:47:59,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 3219 transitions. [2022-07-21 08:48:00,000 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6279750292625829 [2022-07-21 08:48:00,000 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 3219 transitions. [2022-07-21 08:48:00,000 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 3219 transitions. [2022-07-21 08:48:00,001 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:48:00,002 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 3219 transitions. [2022-07-21 08:48:00,007 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 146.3181818181818) internal successors, (3219), 22 states have internal predecessors, (3219), 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) [2022-07-21 08:48:00,013 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 233.0) internal successors, (5359), 23 states have internal predecessors, (5359), 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) [2022-07-21 08:48:00,014 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 233.0) internal successors, (5359), 23 states have internal predecessors, (5359), 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) [2022-07-21 08:48:00,015 INFO L186 Difference]: Start difference. First operand has 242 places, 241 transitions, 636 flow. Second operand 22 states and 3219 transitions. [2022-07-21 08:48:00,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 424 transitions, 1675 flow [2022-07-21 08:48:00,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 424 transitions, 1664 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-07-21 08:48:00,038 INFO L242 Difference]: Finished difference. Result has 267 places, 286 transitions, 1026 flow [2022-07-21 08:48:00,039 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=233, PETRI_DIFFERENCE_MINUEND_FLOW=625, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1026, PETRI_PLACES=267, PETRI_TRANSITIONS=286} [2022-07-21 08:48:00,039 INFO L279 CegarLoopForPetriNet]: 210 programPoint places, 57 predicate places. [2022-07-21 08:48:00,040 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 286 transitions, 1026 flow [2022-07-21 08:48:00,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 136.9) internal successors, (2738), 20 states have internal predecessors, (2738), 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) [2022-07-21 08:48:00,041 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:48:00,042 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:48:00,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 08:48:00,042 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION === [reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr1ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2022-07-21 08:48:00,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:48:00,043 INFO L85 PathProgramCache]: Analyzing trace with hash 1121263530, now seen corresponding path program 1 times [2022-07-21 08:48:00,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:48:00,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210679596] [2022-07-21 08:48:00,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:48:00,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:48:00,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:48:00,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:48:00,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:48:00,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210679596] [2022-07-21 08:48:00,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210679596] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:48:00,607 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:48:00,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-07-21 08:48:00,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068937217] [2022-07-21 08:48:00,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:48:00,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-21 08:48:00,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:48:00,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-21 08:48:00,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=545, Unknown=0, NotChecked=0, Total=600 [2022-07-21 08:48:00,612 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 233 [2022-07-21 08:48:00,616 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 286 transitions, 1026 flow. Second operand has 25 states, 25 states have (on average 131.72) internal successors, (3293), 25 states have internal predecessors, (3293), 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) [2022-07-21 08:48:00,616 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:48:00,616 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 233 [2022-07-21 08:48:00,617 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:48:09,670 INFO L129 PetriNetUnfolder]: 20350/56173 cut-off events. [2022-07-21 08:48:09,670 INFO L130 PetriNetUnfolder]: For 22511/22539 co-relation queries the response was YES. [2022-07-21 08:48:09,900 INFO L84 FinitePrefix]: Finished finitePrefix Result has 102649 conditions, 56173 events. 20350/56173 cut-off events. For 22511/22539 co-relation queries the response was YES. Maximal size of possible extension queue 1375. Compared 692418 event pairs, 3305 based on Foata normal form. 105/53064 useless extension candidates. Maximal degree in co-relation 100590. Up to 14605 conditions per place. [2022-07-21 08:48:10,073 INFO L132 encePairwiseOnDemand]: 204/233 looper letters, 580 selfloop transitions, 160 changer transitions 2/865 dead transitions. [2022-07-21 08:48:10,073 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 865 transitions, 4698 flow [2022-07-21 08:48:10,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-07-21 08:48:10,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2022-07-21 08:48:10,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 5363 transitions. [2022-07-21 08:48:10,081 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.622085604918223 [2022-07-21 08:48:10,081 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 5363 transitions. [2022-07-21 08:48:10,081 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 5363 transitions. [2022-07-21 08:48:10,083 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:48:10,083 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 5363 transitions. [2022-07-21 08:48:10,091 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 144.94594594594594) internal successors, (5363), 37 states have internal predecessors, (5363), 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) [2022-07-21 08:48:10,100 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 233.0) internal successors, (8854), 38 states have internal predecessors, (8854), 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) [2022-07-21 08:48:10,101 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 233.0) internal successors, (8854), 38 states have internal predecessors, (8854), 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) [2022-07-21 08:48:10,102 INFO L186 Difference]: Start difference. First operand has 267 places, 286 transitions, 1026 flow. Second operand 37 states and 5363 transitions. [2022-07-21 08:48:10,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 865 transitions, 4698 flow [2022-07-21 08:48:10,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 865 transitions, 4618 flow, removed 32 selfloop flow, removed 8 redundant places. [2022-07-21 08:48:10,192 INFO L242 Difference]: Finished difference. Result has 317 places, 404 transitions, 2183 flow [2022-07-21 08:48:10,192 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=233, PETRI_DIFFERENCE_MINUEND_FLOW=992, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=2183, PETRI_PLACES=317, PETRI_TRANSITIONS=404} [2022-07-21 08:48:10,194 INFO L279 CegarLoopForPetriNet]: 210 programPoint places, 107 predicate places. [2022-07-21 08:48:10,194 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 404 transitions, 2183 flow [2022-07-21 08:48:10,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 131.72) internal successors, (3293), 25 states have internal predecessors, (3293), 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) [2022-07-21 08:48:10,195 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:48:10,196 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:48:10,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-21 08:48:10,196 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION === [reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr1ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2022-07-21 08:48:10,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:48:10,198 INFO L85 PathProgramCache]: Analyzing trace with hash -80024368, now seen corresponding path program 2 times [2022-07-21 08:48:10,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:48:10,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064579342] [2022-07-21 08:48:10,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:48:10,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:48:10,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:48:10,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:48:10,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:48:10,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064579342] [2022-07-21 08:48:10,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064579342] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:48:10,779 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:48:10,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-07-21 08:48:10,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933608625] [2022-07-21 08:48:10,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:48:10,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-21 08:48:10,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:48:10,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-21 08:48:10,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=584, Unknown=0, NotChecked=0, Total=650 [2022-07-21 08:48:10,782 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 233 [2022-07-21 08:48:10,785 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 404 transitions, 2183 flow. Second operand has 26 states, 26 states have (on average 131.6153846153846) internal successors, (3422), 26 states have internal predecessors, (3422), 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) [2022-07-21 08:48:10,785 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:48:10,785 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 233 [2022-07-21 08:48:10,785 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-21 08:48:22,476 INFO L129 PetriNetUnfolder]: 27406/69290 cut-off events. [2022-07-21 08:48:22,476 INFO L130 PetriNetUnfolder]: For 51830/52016 co-relation queries the response was YES. [2022-07-21 08:48:23,222 INFO L84 FinitePrefix]: Finished finitePrefix Result has 147640 conditions, 69290 events. 27406/69290 cut-off events. For 51830/52016 co-relation queries the response was YES. Maximal size of possible extension queue 1877. Compared 855967 event pairs, 5524 based on Foata normal form. 335/65358 useless extension candidates. Maximal degree in co-relation 145461. Up to 16888 conditions per place. [2022-07-21 08:48:23,433 INFO L132 encePairwiseOnDemand]: 203/233 looper letters, 492 selfloop transitions, 217 changer transitions 0/832 dead transitions. [2022-07-21 08:48:23,433 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 832 transitions, 5246 flow [2022-07-21 08:48:23,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-21 08:48:23,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2022-07-21 08:48:23,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 5036 transitions. [2022-07-21 08:48:23,443 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6175352544451257 [2022-07-21 08:48:23,444 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 5036 transitions. [2022-07-21 08:48:23,447 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 5036 transitions. [2022-07-21 08:48:23,450 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-21 08:48:23,450 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 5036 transitions. [2022-07-21 08:48:23,468 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 143.88571428571427) internal successors, (5036), 35 states have internal predecessors, (5036), 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) [2022-07-21 08:48:23,478 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 233.0) internal successors, (8388), 36 states have internal predecessors, (8388), 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) [2022-07-21 08:48:23,479 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 233.0) internal successors, (8388), 36 states have internal predecessors, (8388), 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) [2022-07-21 08:48:23,479 INFO L186 Difference]: Start difference. First operand has 317 places, 404 transitions, 2183 flow. Second operand 35 states and 5036 transitions. [2022-07-21 08:48:23,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 832 transitions, 5246 flow [2022-07-21 08:48:23,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 832 transitions, 5164 flow, removed 29 selfloop flow, removed 9 redundant places. [2022-07-21 08:48:23,923 INFO L242 Difference]: Finished difference. Result has 354 places, 452 transitions, 3102 flow [2022-07-21 08:48:23,924 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=233, PETRI_DIFFERENCE_MINUEND_FLOW=2117, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=3102, PETRI_PLACES=354, PETRI_TRANSITIONS=452} [2022-07-21 08:48:23,925 INFO L279 CegarLoopForPetriNet]: 210 programPoint places, 144 predicate places. [2022-07-21 08:48:23,925 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 452 transitions, 3102 flow [2022-07-21 08:48:23,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 131.6153846153846) internal successors, (3422), 26 states have internal predecessors, (3422), 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) [2022-07-21 08:48:23,926 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-21 08:48:23,926 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 08:48:23,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-21 08:48:23,926 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION === [reader_twoErr0ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr1ASSERT_VIOLATIONERROR_FUNCTION, reader_twoErr2ASSERT_VIOLATIONERROR_FUNCTION (and 7 more)] === [2022-07-21 08:48:23,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 08:48:23,927 INFO L85 PathProgramCache]: Analyzing trace with hash 1907524322, now seen corresponding path program 3 times [2022-07-21 08:48:23,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 08:48:23,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70868380] [2022-07-21 08:48:23,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 08:48:23,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 08:48:23,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 08:48:24,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 08:48:24,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 08:48:24,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70868380] [2022-07-21 08:48:24,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70868380] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 08:48:24,579 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 08:48:24,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-07-21 08:48:24,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873318616] [2022-07-21 08:48:24,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 08:48:24,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-21 08:48:24,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 08:48:24,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-21 08:48:24,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=745, Unknown=0, NotChecked=0, Total=812 [2022-07-21 08:48:24,582 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 233 [2022-07-21 08:48:24,584 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 452 transitions, 3102 flow. Second operand has 29 states, 29 states have (on average 126.41379310344827) internal successors, (3666), 29 states have internal predecessors, (3666), 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) [2022-07-21 08:48:24,584 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-21 08:48:24,584 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 233 [2022-07-21 08:48:24,584 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand