./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 eb692b52 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-?-eb692b5 [2022-07-19 21:15:07,635 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 21:15:07,637 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 21:15:07,663 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 21:15:07,664 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 21:15:07,665 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 21:15:07,667 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 21:15:07,671 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 21:15:07,676 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 21:15:07,680 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 21:15:07,682 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 21:15:07,683 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 21:15:07,684 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 21:15:07,686 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 21:15:07,686 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 21:15:07,687 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 21:15:07,688 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 21:15:07,689 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 21:15:07,690 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 21:15:07,691 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 21:15:07,696 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 21:15:07,696 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 21:15:07,697 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 21:15:07,698 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 21:15:07,698 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 21:15:07,701 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 21:15:07,701 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 21:15:07,701 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 21:15:07,702 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 21:15:07,702 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 21:15:07,703 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 21:15:07,703 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 21:15:07,704 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 21:15:07,704 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 21:15:07,705 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 21:15:07,706 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 21:15:07,706 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 21:15:07,707 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 21:15:07,707 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 21:15:07,707 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 21:15:07,708 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 21:15:07,709 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 21:15:07,709 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 21:15:07,727 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 21:15:07,727 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 21:15:07,727 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 21:15:07,728 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 21:15:07,728 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 21:15:07,728 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 21:15:07,729 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 21:15:07,729 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 21:15:07,729 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 21:15:07,730 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 21:15:07,730 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 21:15:07,730 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 21:15:07,730 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 21:15:07,731 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 21:15:07,731 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 21:15:07,731 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 21:15:07,731 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 21:15:07,732 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 21:15:07,732 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 21:15:07,732 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 21:15:07,732 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 21:15:07,733 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 21:15:07,733 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 21:15:07,733 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 21:15:07,733 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:15:07,733 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 21:15:07,734 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 21:15:07,734 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 21:15:07,734 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 21:15:07,734 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 21:15:07,735 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 21:15:07,735 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 21:15:07,735 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 21:15:07,735 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 509c3c8c1895397e4c0d03f6462ad0ca0ed3ce99b40d08b775ab8473dba5ee1f [2022-07-19 21:15:07,937 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 21:15:07,958 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 21:15:07,963 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 21:15:07,964 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 21:15:07,965 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 21:15:07,966 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread-divine/ring_2w1r-1.i [2022-07-19 21:15:08,029 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/25b81336d/06f02ed886554d0bb7d5be91b09e1cb7/FLAG253bc4408 [2022-07-19 21:15:08,490 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 21:15:08,503 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread-divine/ring_2w1r-1.i [2022-07-19 21:15:08,536 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/25b81336d/06f02ed886554d0bb7d5be91b09e1cb7/FLAG253bc4408 [2022-07-19 21:15:09,045 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/25b81336d/06f02ed886554d0bb7d5be91b09e1cb7 [2022-07-19 21:15:09,048 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 21:15:09,049 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 21:15:09,051 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 21:15:09,051 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 21:15:09,057 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 21:15:09,058 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:15:09" (1/1) ... [2022-07-19 21:15:09,059 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@741abab7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:15:09, skipping insertion in model container [2022-07-19 21:15:09,059 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:15:09" (1/1) ... [2022-07-19 21:15:09,066 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 21:15:09,110 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 21:15:09,249 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-07-19 21:15:09,483 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] [2022-07-19 21:15:09,487 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] [2022-07-19 21:15:09,488 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] [2022-07-19 21:15:09,549 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] [2022-07-19 21:15:09,550 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] [2022-07-19 21:15:09,552 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] [2022-07-19 21:15:09,553 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] [2022-07-19 21:15:09,561 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:15:09,571 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 21:15:09,587 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-07-19 21:15:09,611 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] [2022-07-19 21:15:09,615 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] [2022-07-19 21:15:09,616 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] [2022-07-19 21:15:09,633 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] [2022-07-19 21:15:09,637 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] [2022-07-19 21:15:09,638 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] [2022-07-19 21:15:09,639 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] [2022-07-19 21:15:09,644 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 21:15:09,712 INFO L208 MainTranslator]: Completed translation [2022-07-19 21:15:09,713 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:15:09 WrapperNode [2022-07-19 21:15:09,713 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 21:15:09,714 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 21:15:09,715 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 21:15:09,715 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 21:15:09,721 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:15:09" (1/1) ... [2022-07-19 21:15:09,755 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:15:09" (1/1) ... [2022-07-19 21:15:09,795 INFO L137 Inliner]: procedures = 310, calls = 70, calls flagged for inlining = 10, calls inlined = 8, statements flattened = 203 [2022-07-19 21:15:09,796 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 21:15:09,797 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 21:15:09,798 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 21:15:09,798 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 21:15:09,805 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:15:09" (1/1) ... [2022-07-19 21:15:09,806 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:15:09" (1/1) ... [2022-07-19 21:15:09,820 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:15:09" (1/1) ... [2022-07-19 21:15:09,821 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:15:09" (1/1) ... [2022-07-19 21:15:09,829 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:15:09" (1/1) ... [2022-07-19 21:15:09,844 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:15:09" (1/1) ... [2022-07-19 21:15:09,848 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:15:09" (1/1) ... [2022-07-19 21:15:09,852 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 21:15:09,856 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 21:15:09,856 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 21:15:09,856 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 21:15:09,857 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:15:09" (1/1) ... [2022-07-19 21:15:09,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 21:15:09,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 21:15:09,891 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) [2022-07-19 21:15:09,906 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 [2022-07-19 21:15:09,939 INFO L130 BoogieDeclarations]: Found specification of procedure reader_two [2022-07-19 21:15:09,940 INFO L138 BoogieDeclarations]: Found implementation of procedure reader_two [2022-07-19 21:15:09,940 INFO L130 BoogieDeclarations]: Found specification of procedure writer_fn [2022-07-19 21:15:09,940 INFO L138 BoogieDeclarations]: Found implementation of procedure writer_fn [2022-07-19 21:15:09,940 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-19 21:15:09,940 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-19 21:15:09,941 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-19 21:15:09,941 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-19 21:15:09,941 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-07-19 21:15:09,941 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 21:15:09,941 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 21:15:09,941 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 21:15:09,941 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 21:15:09,943 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-19 21:15:10,079 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 21:15:10,082 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 21:15:10,367 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 21:15:10,386 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 21:15:10,386 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-07-19 21:15:10,388 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:15:10 BoogieIcfgContainer [2022-07-19 21:15:10,388 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 21:15:10,390 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 21:15:10,390 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 21:15:10,392 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 21:15:10,393 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 09:15:09" (1/3) ... [2022-07-19 21:15:10,393 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65789fd7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:15:10, skipping insertion in model container [2022-07-19 21:15:10,393 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:15:09" (2/3) ... [2022-07-19 21:15:10,394 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65789fd7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:15:10, skipping insertion in model container [2022-07-19 21:15:10,394 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:15:10" (3/3) ... [2022-07-19 21:15:10,395 INFO L111 eAbstractionObserver]: Analyzing ICFG ring_2w1r-1.i [2022-07-19 21:15:10,399 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-19 21:15:10,406 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 21:15:10,407 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2022-07-19 21:15:10,407 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-19 21:15:10,554 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-19 21:15:10,585 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 223 places, 233 transitions, 482 flow [2022-07-19 21:15:10,665 INFO L129 PetriNetUnfolder]: 17/231 cut-off events. [2022-07-19 21:15:10,665 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-19 21:15:10,682 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. [2022-07-19 21:15:10,683 INFO L82 GeneralOperation]: Start removeDead. Operand has 223 places, 233 transitions, 482 flow [2022-07-19 21:15:10,689 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 210 places, 220 transitions, 449 flow [2022-07-19 21:15:10,702 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 21:15:10,711 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@4420d3e4, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6c9a287 [2022-07-19 21:15:10,712 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2022-07-19 21:15:10,749 INFO L129 PetriNetUnfolder]: 11/188 cut-off events. [2022-07-19 21:15:10,750 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-07-19 21:15:10,750 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:15:10,750 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] [2022-07-19 21:15:10,751 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)] === [2022-07-19 21:15:10,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:15:10,755 INFO L85 PathProgramCache]: Analyzing trace with hash 508547485, now seen corresponding path program 1 times [2022-07-19 21:15:10,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:15:10,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017800815] [2022-07-19 21:15:10,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:15:10,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:15:10,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:15:11,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:15:11,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:15:11,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017800815] [2022-07-19 21:15:11,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017800815] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:15:11,611 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:15:11,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-07-19 21:15:11,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802252637] [2022-07-19 21:15:11,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:15:11,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-19 21:15:11,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:15:11,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-19 21:15:11,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2022-07-19 21:15:11,667 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 233 [2022-07-19 21:15:11,678 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) [2022-07-19 21:15:11,678 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:15:11,678 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 233 [2022-07-19 21:15:11,679 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:15:16,926 INFO L129 PetriNetUnfolder]: 6891/21160 cut-off events. [2022-07-19 21:15:16,927 INFO L130 PetriNetUnfolder]: For 74/74 co-relation queries the response was YES. [2022-07-19 21:15:17,073 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. [2022-07-19 21:15:17,164 INFO L132 encePairwiseOnDemand]: 201/233 looper letters, 182 selfloop transitions, 40 changer transitions 0/350 dead transitions. [2022-07-19 21:15:17,164 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 350 transitions, 1174 flow [2022-07-19 21:15:17,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-19 21:15:17,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-07-19 21:15:17,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 3769 transitions. [2022-07-19 21:15:17,185 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.622152525586002 [2022-07-19 21:15:17,186 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 3769 transitions. [2022-07-19 21:15:17,186 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 3769 transitions. [2022-07-19 21:15:17,191 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:15:17,193 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 3769 transitions. [2022-07-19 21:15:17,204 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) [2022-07-19 21:15:17,222 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) [2022-07-19 21:15:17,225 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) [2022-07-19 21:15:17,227 INFO L186 Difference]: Start difference. First operand has 210 places, 220 transitions, 449 flow. Second operand 26 states and 3769 transitions. [2022-07-19 21:15:17,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 350 transitions, 1174 flow [2022-07-19 21:15:17,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 350 transitions, 1161 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-07-19 21:15:17,248 INFO L242 Difference]: Finished difference. Result has 242 places, 241 transitions, 636 flow [2022-07-19 21:15:17,250 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} [2022-07-19 21:15:17,254 INFO L279 CegarLoopForPetriNet]: 210 programPoint places, 32 predicate places. [2022-07-19 21:15:17,254 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 241 transitions, 636 flow [2022-07-19 21:15:17,256 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) [2022-07-19 21:15:17,256 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:15:17,257 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] [2022-07-19 21:15:17,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 21:15:17,258 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)] === [2022-07-19 21:15:17,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:15:17,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1573639700, now seen corresponding path program 1 times [2022-07-19 21:15:17,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:15:17,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090171670] [2022-07-19 21:15:17,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:15:17,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:15:17,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:15:17,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:15:17,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:15:17,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090171670] [2022-07-19 21:15:17,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090171670] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:15:17,835 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:15:17,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-07-19 21:15:17,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173798820] [2022-07-19 21:15:17,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:15:17,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-19 21:15:17,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:15:17,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-19 21:15:17,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2022-07-19 21:15:17,840 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 233 [2022-07-19 21:15:17,843 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) [2022-07-19 21:15:17,843 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:15:17,843 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 233 [2022-07-19 21:15:17,843 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:15:22,963 INFO L129 PetriNetUnfolder]: 8787/26100 cut-off events. [2022-07-19 21:15:22,964 INFO L130 PetriNetUnfolder]: For 2473/2479 co-relation queries the response was YES. [2022-07-19 21:15:23,043 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. [2022-07-19 21:15:23,133 INFO L132 encePairwiseOnDemand]: 209/233 looper letters, 221 selfloop transitions, 67 changer transitions 8/424 dead transitions. [2022-07-19 21:15:23,134 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 424 transitions, 1675 flow [2022-07-19 21:15:23,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-19 21:15:23,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-07-19 21:15:23,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 3219 transitions. [2022-07-19 21:15:23,142 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6279750292625829 [2022-07-19 21:15:23,142 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 3219 transitions. [2022-07-19 21:15:23,142 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 3219 transitions. [2022-07-19 21:15:23,144 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:15:23,144 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 3219 transitions. [2022-07-19 21:15:23,151 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) [2022-07-19 21:15:23,159 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) [2022-07-19 21:15:23,162 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) [2022-07-19 21:15:23,162 INFO L186 Difference]: Start difference. First operand has 242 places, 241 transitions, 636 flow. Second operand 22 states and 3219 transitions. [2022-07-19 21:15:23,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 424 transitions, 1675 flow [2022-07-19 21:15:23,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 424 transitions, 1664 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-07-19 21:15:23,190 INFO L242 Difference]: Finished difference. Result has 267 places, 286 transitions, 1026 flow [2022-07-19 21:15:23,191 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} [2022-07-19 21:15:23,192 INFO L279 CegarLoopForPetriNet]: 210 programPoint places, 57 predicate places. [2022-07-19 21:15:23,192 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 286 transitions, 1026 flow [2022-07-19 21:15:23,194 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) [2022-07-19 21:15:23,194 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:15:23,194 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] [2022-07-19 21:15:23,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 21:15:23,195 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)] === [2022-07-19 21:15:23,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:15:23,198 INFO L85 PathProgramCache]: Analyzing trace with hash 1121263530, now seen corresponding path program 1 times [2022-07-19 21:15:23,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:15:23,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231686428] [2022-07-19 21:15:23,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:15:23,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:15:23,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:15:24,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:15:24,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:15:24,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231686428] [2022-07-19 21:15:24,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231686428] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:15:24,003 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:15:24,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-07-19 21:15:24,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918140304] [2022-07-19 21:15:24,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:15:24,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-19 21:15:24,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:15:24,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-19 21:15:24,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=545, Unknown=0, NotChecked=0, Total=600 [2022-07-19 21:15:24,008 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 233 [2022-07-19 21:15:24,010 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) [2022-07-19 21:15:24,010 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:15:24,011 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 233 [2022-07-19 21:15:24,011 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:15:33,969 INFO L129 PetriNetUnfolder]: 20350/56173 cut-off events. [2022-07-19 21:15:33,970 INFO L130 PetriNetUnfolder]: For 22511/22539 co-relation queries the response was YES. [2022-07-19 21:15:34,187 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. [2022-07-19 21:15:34,398 INFO L132 encePairwiseOnDemand]: 204/233 looper letters, 580 selfloop transitions, 160 changer transitions 2/865 dead transitions. [2022-07-19 21:15:34,398 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 865 transitions, 4698 flow [2022-07-19 21:15:34,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-07-19 21:15:34,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2022-07-19 21:15:34,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 5363 transitions. [2022-07-19 21:15:34,411 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.622085604918223 [2022-07-19 21:15:34,412 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 5363 transitions. [2022-07-19 21:15:34,412 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 5363 transitions. [2022-07-19 21:15:34,415 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:15:34,415 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 5363 transitions. [2022-07-19 21:15:34,426 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) [2022-07-19 21:15:34,439 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) [2022-07-19 21:15:34,441 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) [2022-07-19 21:15:34,442 INFO L186 Difference]: Start difference. First operand has 267 places, 286 transitions, 1026 flow. Second operand 37 states and 5363 transitions. [2022-07-19 21:15:34,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 865 transitions, 4698 flow [2022-07-19 21:15:34,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 865 transitions, 4618 flow, removed 32 selfloop flow, removed 8 redundant places. [2022-07-19 21:15:34,540 INFO L242 Difference]: Finished difference. Result has 317 places, 404 transitions, 2183 flow [2022-07-19 21:15:34,541 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} [2022-07-19 21:15:34,543 INFO L279 CegarLoopForPetriNet]: 210 programPoint places, 107 predicate places. [2022-07-19 21:15:34,543 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 404 transitions, 2183 flow [2022-07-19 21:15:34,544 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) [2022-07-19 21:15:34,544 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:15:34,545 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] [2022-07-19 21:15:34,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-19 21:15:34,545 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)] === [2022-07-19 21:15:34,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:15:34,546 INFO L85 PathProgramCache]: Analyzing trace with hash -80024368, now seen corresponding path program 2 times [2022-07-19 21:15:34,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:15:34,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277449876] [2022-07-19 21:15:34,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:15:34,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:15:34,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:15:35,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:15:35,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:15:35,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277449876] [2022-07-19 21:15:35,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277449876] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:15:35,196 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:15:35,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-07-19 21:15:35,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919532067] [2022-07-19 21:15:35,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:15:35,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-19 21:15:35,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:15:35,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-19 21:15:35,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=584, Unknown=0, NotChecked=0, Total=650 [2022-07-19 21:15:35,200 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 233 [2022-07-19 21:15:35,203 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) [2022-07-19 21:15:35,203 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:15:35,203 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 233 [2022-07-19 21:15:35,204 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-19 21:15:47,700 INFO L129 PetriNetUnfolder]: 27406/69290 cut-off events. [2022-07-19 21:15:47,700 INFO L130 PetriNetUnfolder]: For 51830/52016 co-relation queries the response was YES. [2022-07-19 21:15:48,386 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. [2022-07-19 21:15:48,649 INFO L132 encePairwiseOnDemand]: 203/233 looper letters, 492 selfloop transitions, 217 changer transitions 0/832 dead transitions. [2022-07-19 21:15:48,650 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 832 transitions, 5246 flow [2022-07-19 21:15:48,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-19 21:15:48,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2022-07-19 21:15:48,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 5036 transitions. [2022-07-19 21:15:48,660 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6175352544451257 [2022-07-19 21:15:48,660 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 5036 transitions. [2022-07-19 21:15:48,660 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 5036 transitions. [2022-07-19 21:15:48,664 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-19 21:15:48,664 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 5036 transitions. [2022-07-19 21:15:48,674 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) [2022-07-19 21:15:48,691 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) [2022-07-19 21:15:48,694 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) [2022-07-19 21:15:48,694 INFO L186 Difference]: Start difference. First operand has 317 places, 404 transitions, 2183 flow. Second operand 35 states and 5036 transitions. [2022-07-19 21:15:48,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 832 transitions, 5246 flow [2022-07-19 21:15:49,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 832 transitions, 5164 flow, removed 29 selfloop flow, removed 9 redundant places. [2022-07-19 21:15:49,160 INFO L242 Difference]: Finished difference. Result has 354 places, 452 transitions, 3102 flow [2022-07-19 21:15:49,161 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} [2022-07-19 21:15:49,162 INFO L279 CegarLoopForPetriNet]: 210 programPoint places, 144 predicate places. [2022-07-19 21:15:49,162 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 452 transitions, 3102 flow [2022-07-19 21:15:49,163 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) [2022-07-19 21:15:49,163 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-19 21:15:49,164 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] [2022-07-19 21:15:49,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-19 21:15:49,164 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)] === [2022-07-19 21:15:49,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 21:15:49,165 INFO L85 PathProgramCache]: Analyzing trace with hash 1907524322, now seen corresponding path program 3 times [2022-07-19 21:15:49,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 21:15:49,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343734080] [2022-07-19 21:15:49,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 21:15:49,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 21:15:49,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 21:15:50,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 21:15:50,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 21:15:50,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343734080] [2022-07-19 21:15:50,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343734080] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 21:15:50,058 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 21:15:50,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-07-19 21:15:50,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991041583] [2022-07-19 21:15:50,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 21:15:50,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-19 21:15:50,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 21:15:50,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-19 21:15:50,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=745, Unknown=0, NotChecked=0, Total=812 [2022-07-19 21:15:50,062 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 233 [2022-07-19 21:15:50,065 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) [2022-07-19 21:15:50,065 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-19 21:15:50,065 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 233 [2022-07-19 21:15:50,065 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand